/* roulang page: index */
:root {
            --primary: #1f6feb;
            --primary-hover: #174ea6;
            --primary-active: #123f85;
            --primary-light: rgba(42, 109, 244, 0.08);
            --primary-focus: rgba(42, 109, 244, 0.35);
            --secondary: #e8eef7;
            --bg: #f5f7fb;
            --card: #ffffff;
            --text: #0f1b2d;
            --text-secondary: #5a6b85;
            --text-muted: #9aa8bf;
            --border: #dce5f2;
            --border-light: #e5eaf3;
            --success: #16a34a;
            --warning: #f59e0b;
            --danger: #dc2626;
            --radius-sm: 12px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --radius-xl: 22px;
            --shadow-sm: 0 2px 8px rgba(31, 60, 110, 0.06);
            --shadow-md: 0 6px 24px rgba(31, 60, 110, 0.08);
            --shadow-lg: 0 12px 36px rgba(31, 60, 110, 0.12);
            --font-family: 'Inter', 'Roboto', 'Hiragino Sans GB', 'HarmonyOS Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container-max: 1200px;
            --section-gap: 76px;
            --section-gap-mobile: 48px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 15px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--primary);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border-width: 0;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 16px;
            z-index: 100;
            padding: 0 20px;
            margin-bottom: 0;
        }

        .nav-panel {
            max-width: var(--container-max);
            margin: 0 auto;
            background-color: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: 0 4px 18px rgba(31, 60, 110, 0.06);
            border: 1px solid var(--border-light);
            padding: 12px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 17px;
            color: var(--text);
            white-space: nowrap;
        }

        .nav-brand:hover {
            color: var(--primary);
        }

        .nav-brand-icon {
            width: 34px;
            height: 34px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            border-radius: 10px;
            color: #fff;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            overflow-x: auto;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            background: transparent;
            border: 1px solid transparent;
            transition: var(--transition);
            min-height: 44px;
        }

        .nav-link:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .nav-link.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
            border-color: rgba(42, 109, 244, 0.15);
            position: relative;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-link .nav-icon {
            font-size: 14px;
            line-height: 1;
        }

        .nav-cta {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: var(--transition);
            min-height: 44px;
        }

        .nav-cta:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .nav-cta:active {
            background: var(--primary-active);
            transform: translateY(0);
        }

        .nav-cta:focus-visible,
        .nav-link:focus-visible,
        .btn:focus-visible {
            outline: 3px solid var(--primary-focus);
            outline-offset: 2px;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: var(--card);
            color: var(--text);
            flex-shrink: 0;
        }

        .nav-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ===== Hero Section ===== */
        .hero-section {
            padding: 40px 0 0;
        }

        .hero-card {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            min-height: 520px;
            display: flex;
            align-items: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-md);
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(245, 247, 251, 0.96) 0%, rgba(245, 247, 251, 0.88) 35%, rgba(232, 238, 247, 0.65) 65%, rgba(232, 238, 247, 0.4) 100%);
            z-index: 1;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            padding: 56px 48px;
            max-width: 680px;
        }

        .hero-tag {
            display: inline-block;
            padding: 6px 14px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 12px;
            background: rgba(255, 255, 255, 0.85);
            border: 1px solid var(--border);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-left: 8px;
        }

        .hero-title {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .hero-title .highlight {
            color: var(--primary);
        }

        .hero-subtitle {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 560px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 26px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            min-height: 48px;
            text-align: center;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(31, 111, 235, 0.3);
        }

        .btn-primary:active {
            background: var(--primary-active);
            transform: translateY(0);
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }

        .btn-secondary:hover {
            background: var(--primary-light);
            color: var(--primary);
            transform: translateY(-2px);
        }

        .btn-secondary:active {
            transform: translateY(0);
        }

        .btn-outline-light {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.3);
            color: #fff;
            transform: translateY(-2px);
        }

        .hero-trust {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 12px;
            color: var(--text-muted);
        }

        .hero-trust span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .hero-trust .dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--success);
            display: inline-block;
        }

        /* ===== Section Common ===== */
        .section {
            padding: var(--section-gap) 0 0;
        }

        .section-header {
            margin-bottom: 36px;
        }

        .section-tag {
            display: inline-block;
            padding: 5px 14px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
            line-height: 1.3;
            letter-spacing: -0.3px;
        }

        .section-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 640px;
        }

        /* ===== Series Navigation ===== */
        .series-nav-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 14px;
        }

        .series-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 20px 16px;
            text-align: center;
            transition: var(--transition);
            display: block;
            min-height: 90px;
        }

        .series-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            color: var(--primary);
        }

        .series-card-icon {
            font-size: 24px;
            margin-bottom: 8px;
            display: block;
        }

        .series-card-name {
            font-size: 13px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
        }

        .series-card:hover .series-card-name {
            color: var(--primary);
        }

        /* ===== Solution Steps ===== */
        .solution-layout {
            display: grid;
            grid-template-columns: 340px 1fr;
            gap: 36px;
            align-items: stretch;
        }

        .solution-intro {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
        }

        .solution-intro h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }

        .solution-intro p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        .solution-steps {
            display: flex;
            gap: 14px;
            overflow-x: auto;
            scrollbar-width: thin;
            scrollbar-color: var(--border) transparent;
            padding-bottom: 8px;
            -webkit-overflow-scrolling: touch;
        }

        .solution-steps::-webkit-scrollbar {
            height: 5px;
        }

        .solution-steps::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 4px;
        }

        .step-card {
            flex: 0 0 220px;
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 22px 18px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .step-card:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .step-num {
            font-size: 36px;
            font-weight: 700;
            color: var(--secondary);
            line-height: 1;
            letter-spacing: -1px;
        }

        .step-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
        }

        .step-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Stats Panel ===== */
        .stats-panel {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-xl);
            padding: 36px 32px;
            box-shadow: var(--shadow-sm);
            position: relative;
            overflow: hidden;
        }

        .stats-panel::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
            opacity: 0.5;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 20px;
        }

        .stat-item {
            text-align: center;
            padding: 8px 0;
        }

        .stat-num {
            font-size: 34px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -1px;
        }

        .stat-label {
            font-size: 12px;
            color: var(--text-secondary);
            margin-top: 6px;
            line-height: 1.5;
        }

        .stat-divider {
            width: 100%;
            height: 1px;
            background: var(--border-light);
            margin: 20px 0;
        }

        .stats-bars {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 20px;
        }

        .stats-bar-item {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .stats-bar-label {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            min-width: 70px;
        }

        .stats-bar-track {
            flex: 1;
            height: 6px;
            background: var(--secondary);
            border-radius: 4px;
            overflow: hidden;
        }

        .stats-bar-fill {
            height: 100%;
            background: var(--primary);
            border-radius: 4px;
            transition: width 0.6s ease;
        }

        .stats-bar-pct {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            min-width: 38px;
            text-align: right;
        }

        /* ===== Featured Cards ===== */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .featured-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .featured-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--border);
        }

        .featured-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }

        .featured-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .featured-card-tag {
            display: inline-block;
            padding: 3px 10px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            font-size: 11px;
            font-weight: 600;
            align-self: flex-start;
        }

        .featured-card h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.4;
        }

        .featured-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }

        .featured-card-meta {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        /* ===== News Section ===== */
        .news-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 28px;
            align-items: start;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .news-item {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            transition: var(--transition);
            display: block;
        }

        .news-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-sm);
        }

        .news-item-header {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 8px;
        }

        .news-item-tag {
            padding: 3px 10px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            font-size: 11px;
            font-weight: 600;
        }

        .news-item-date {
            font-size: 12px;
            color: var(--text-muted);
        }

        .news-item h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .news-item p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        .news-sidebar {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 24px 20px;
        }

        .news-sidebar h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 14px;
        }

        .news-sidebar-item {
            display: flex;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
            align-items: center;
            transition: var(--transition);
        }

        .news-sidebar-item:last-child {
            border-bottom: none;
        }

        .news-sidebar-item:hover {
            color: var(--primary);
        }

        .news-sidebar-num {
            font-size: 20px;
            font-weight: 700;
            color: var(--secondary);
            min-width: 30px;
            text-align: center;
            flex-shrink: 0;
        }

        .news-sidebar-item span {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            line-height: 1.4;
        }

        .news-sidebar-item:hover span {
            color: var(--primary);
        }

        /* ===== Scenario Demo ===== */
        .scenario-steps {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }

        .scenario-step {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 20px 16px;
            text-align: center;
            transition: var(--transition);
            position: relative;
        }

        .scenario-step:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .scenario-step-icon {
            font-size: 28px;
            margin-bottom: 8px;
            display: block;
        }

        .scenario-step h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }

        .scenario-step p {
            font-size: 12px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .scenario-step::after {
            content: '→';
            position: absolute;
            right: -14px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 18px;
            color: var(--border);
            z-index: 1;
        }

        .scenario-step:last-child::after {
            display: none;
        }

        /* ===== Testimonials ===== */
        .testimonial-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-xl);
            padding: 32px 36px;
            box-shadow: var(--shadow-sm);
            position: relative;
        }

        .testimonial-quote {
            font-size: 48px;
            color: var(--secondary);
            line-height: 1;
            position: absolute;
            top: 24px;
            left: 28px;
            font-weight: 700;
            opacity: 0.8;
        }

        .testimonial-text {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.7;
            margin-bottom: 18px;
            padding-left: 36px;
            padding-top: 16px;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
            padding-left: 36px;
        }

        .testimonial-author-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            flex-shrink: 0;
        }

        .testimonial-author-info {
            display: flex;
            flex-direction: column;
        }

        .testimonial-author-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
        }

        .testimonial-author-tag {
            font-size: 12px;
            color: var(--text-muted);
        }

        .testimonial-stars {
            color: var(--warning);
            font-size: 14px;
            letter-spacing: 2px;
            margin-left: auto;
        }

        .testimonial-nav {
            display: flex;
            gap: 8px;
            justify-content: center;
            margin-top: 18px;
        }

        .testimonial-dot {
            width: 28px;
            height: 4px;
            border-radius: 4px;
            background: var(--border);
            transition: var(--transition);
            cursor: pointer;
        }

        .testimonial-dot.active {
            background: var(--primary);
            width: 40px;
        }

        .testimonial-dot:hover {
            background: var(--primary);
            opacity: 0.7;
        }

        /* ===== Partners ===== */
        .partners-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 14px;
        }

        .partner-tag {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 16px 14px;
            text-align: center;
            transition: var(--transition);
        }

        .partner-tag:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .partner-tag-name {
            font-size: 13px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 4px;
        }

        .partner-tag-desc {
            font-size: 11px;
            color: var(--text-muted);
            line-height: 1.45;
        }

        /* ===== Brand Intro ===== */
        .brand-intro-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-xl);
            padding: 36px 40px;
            box-shadow: var(--shadow-sm);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }

        .brand-intro-text h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 14px;
        }

        .brand-intro-text p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .brand-intro-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 280px;
        }

        .brand-intro-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ===== Guide ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .guide-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 22px 18px;
            transition: var(--transition);
        }

        .guide-card:hover {
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
            border-color: var(--border);
        }

        .guide-card-icon {
            font-size: 26px;
            display: block;
            margin-bottom: 8px;
        }

        .guide-card h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }

        .guide-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Limited Time ===== */
        .limited-card {
            background: linear-gradient(135deg, #0f1b2d 0%, #1a2c4a 100%);
            border-radius: var(--radius-xl);
            padding: 36px 40px;
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 32px;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .limited-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: repeating-linear-gradient(90deg, transparent, transparent 20px, rgba(255, 255, 255, 0.03) 20px, rgba(255, 255, 255, 0.03) 40px);
            z-index: 0;
        }

        .limited-card > * {
            position: relative;
            z-index: 1;
        }

        .limited-card h3 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .limited-card p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .countdown {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .countdown-item {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            text-align: center;
            min-width: 60px;
        }

        .countdown-num {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            line-height: 1;
        }

        .countdown-label {
            font-size: 10px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 4px;
        }

        .limite-actions {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        /* ===== FAQ ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            background: rgba(42, 109, 244, 0.04);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            width: 100%;
            text-align: left;
            transition: var(--transition);
            min-height: 44px;
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-toggle {
            font-size: 20px;
            font-weight: 300;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--secondary);
        }

        .faq-item.open .faq-toggle {
            transform: rotate(45deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 20px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: var(--section-gap) 0;
        }

        .cta-panel {
            background: #0f1b2d;
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-panel::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
            opacity: 0.7;
        }

        .cta-panel h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .cta-panel p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 520px;
            margin: 0 auto 24px;
            line-height: 1.75;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn-white {
            background: #fff;
            color: var(--text);
        }

        .btn-white:hover {
            background: var(--secondary);
            color: var(--text);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--card);
            border-top: 1px solid var(--border-light);
            border-radius: var(--radius-xl) var(--radius-xl) 0 0;
            margin-top: 40px;
            padding: 40px 0 20px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 28px;
            padding-bottom: 28px;
            border-bottom: 1px solid var(--border-light);
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-top: 10px;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 14px;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            color: var(--text-secondary);
            padding: 5px 0;
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            padding: 5px 0;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 18px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-bottom a {
            color: var(--text-muted);
        }

        .footer-bottom a:hover {
            color: var(--primary);
        }

        .footer-links {
            display: flex;
            gap: 16px;
            align-items: center;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .series-nav-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .featured-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .partners-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenario-steps {
                grid-template-columns: repeat(3, 1fr);
            }
            .scenario-step::after {
                display: none;
            }
            .solution-layout {
                grid-template-columns: 1fr;
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .brand-intro-card {
                grid-template-columns: 1fr;
            }
            .limited-card {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 48px;
            }
            .nav-panel {
                flex-wrap: wrap;
                padding: 10px 14px;
            }
            .nav-links {
                order: 3;
                width: 100%;
                justify-content: flex-start;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-links.collapsed {
                display: none;
            }
            .hero-inner {
                padding: 36px 22px;
            }
            .hero-title {
                font-size: 30px;
            }
            .hero-card {
                min-height: 420px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .stats-bars {
                grid-template-columns: 1fr;
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .scenario-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .partners-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 22px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-links {
                flex-wrap: wrap;
                justify-content: center;
            }
            .cta-panel {
                padding: 32px 20px;
            }
            .cta-panel h2 {
                font-size: 22px;
            }
            .stats-panel {
                padding: 24px 16px;
            }
            .stat-num {
                font-size: 26px;
            }
            .testimonial-card {
                padding: 24px 18px;
            }
            .testimonial-text {
                font-size: 15px;
                padding-left: 0;
            }
            .testimonial-author {
                padding-left: 0;
            }
            .brand-intro-card {
                padding: 24px 18px;
            }
            .limited-card {
                padding: 24px 18px;
            }
            .countdown {
                flex-wrap: wrap;
            }
            .series-nav-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .site-header {
                padding: 0 10px;
                top: 10px;
            }
            .nav-panel {
                border-radius: var(--radius-md);
                gap: 10px;
            }
            .nav-brand {
                font-size: 15px;
            }
            .nav-brand-icon {
                width: 30px;
                height: 30px;
                font-size: 12px;
            }
            .nav-cta {
                padding: 8px 14px;
                font-size: 12px;
                min-height: 38px;
            }
            .nav-link {
                padding: 6px 10px;
                font-size: 12px;
                min-height: 38px;
            }
            .hero-card {
                min-height: 380px;
            }
            .hero-inner {
                padding: 24px 18px;
            }
            .hero-title {
                font-size: 26px;
            }
            .hero-subtitle {
                font-size: 14px;
            }
            .hero-tag {
                font-size: 11px;
                padding: 4px 10px;
            }
            .hero-actions {
                gap: 10px;
            }
            .btn {
                font-size: 13px;
                padding: 11px 18px;
                min-height: 44px;
            }
            .section {
                padding-top: 36px;
            }
            .section-title {
                font-size: 20px;
            }
            .section-desc {
                font-size: 13px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .stat-num {
                font-size: 22px;
            }
            .stat-label {
                font-size: 11px;
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .featured-card-img {
                height: 150px;
            }
            .series-nav-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
            .series-card {
                padding: 14px 10px;
                min-height: 70px;
            }
            .series-card-icon {
                font-size: 20px;
            }
            .series-card-name {
                font-size: 11px;
            }
            .scenario-steps {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .partners-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .partner-tag {
                padding: 12px 10px;
            }
            .partner-tag-name {
                font-size: 12px;
            }
            .partner-tag-desc {
                font-size: 10px;
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .news-item {
                padding: 14px 14px;
            }
            .news-item h4 {
                font-size: 14px;
            }
            .news-item p {
                font-size: 12px;
            }
            .news-sidebar {
                padding: 18px 14px;
            }
            .news-sidebar-item span {
                font-size: 12px;
            }
            .cta-panel h2 {
                font-size: 20px;
            }
            .cta-panel p {
                font-size: 13px;
            }
            .testimonial-text {
                font-size: 14px;
            }
            .testimonial-quote {
                font-size: 36px;
                top: 16px;
                left: 16px;
            }
            .footer-grid {
                gap: 16px;
            }
            .footer-col h4 {
                font-size: 13px;
                margin-bottom: 8px;
            }
            .footer-col a {
                font-size: 12px;
                padding: 4px 0;
            }
            .footer-bottom {
                font-size: 11px;
            }
            .countdown-item {
                padding: 8px 10px;
                min-width: 48px;
            }
            .countdown-num {
                font-size: 18px;
            }
            .stats-bars {
                grid-template-columns: 1fr;
            }
            .brand-intro-text h3 {
                font-size: 18px;
            }
            .brand-intro-img {
                height: 180px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1f6feb;
            --primary-hover: #174ea6;
            --primary-active: #123f85;
            --primary-light: rgba(42, 109, 244, 0.08);
            --primary-focus: rgba(42, 109, 244, 0.35);
            --secondary: #e8eef7;
            --bg: #f5f7fb;
            --card: #ffffff;
            --text: #0f1b2d;
            --text-secondary: #5a6b85;
            --text-muted: #9aa8bf;
            --border: #dce5f2;
            --border-light: #e5eaf3;
            --success: #16a34a;
            --warning: #f59e0b;
            --danger: #dc2626;
            --radius-sm: 12px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --radius-xl: 22px;
            --shadow-sm: 0 2px 8px rgba(31, 60, 110, 0.06);
            --shadow-md: 0 6px 24px rgba(31, 60, 110, 0.08);
            --shadow-lg: 0 12px 36px rgba(31, 60, 110, 0.12);
            --font-family: 'Inter', 'Roboto', 'Hiragino Sans GB', 'HarmonyOS Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container-max: 1200px;
            --section-gap: 56px;
            --section-gap-mobile: 36px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 15px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        main {
            flex: 1;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--primary);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 12px;
            z-index: 100;
            padding: 0 20px;
            margin-bottom: 28px;
        }

        .nav-panel {
            max-width: var(--container-max);
            margin: 0 auto;
            background-color: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: 0 4px 18px rgba(31, 60, 110, 0.06);
            border: 1px solid var(--border-light);
            padding: 10px 18px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            flex-wrap: wrap;
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 17px;
            color: var(--text);
            white-space: nowrap;
        }

        .nav-brand:hover {
            color: var(--primary);
        }

        .nav-brand-icon {
            width: 34px;
            height: 34px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            border-radius: 10px;
            color: #fff;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            overflow-x: auto;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 13px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            background: transparent;
            border: 1px solid transparent;
            transition: var(--transition);
            min-height: 44px;
            position: relative;
        }

        .nav-link:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .nav-link.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
            border-color: rgba(42, 109, 244, 0.15);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 6px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-link .nav-icon {
            font-size: 14px;
            line-height: 1;
            flex-shrink: 0;
        }

        .nav-cta {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            white-space: nowrap;
            transition: var(--transition);
            min-height: 44px;
        }

        .nav-cta:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--primary-light);
            color: var(--primary);
            align-items: center;
            justify-content: center;
            transition: var(--transition);
            flex-shrink: 0;
        }

        .nav-toggle:hover {
            background: rgba(42, 109, 244, 0.18);
        }

        .nav-toggle svg {
            width: 20px;
            height: 20px;
        }

        /* ===== Hero ===== */
        .hero {
            padding: 36px 0 20px;
            margin-bottom: 28px;
        }

        .hero-wrapper {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 28px;
            align-items: stretch;
        }

        .hero-main {
            background: var(--card);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            padding: 36px 32px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: relative;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center right;
            background-repeat: no-repeat;
            min-height: 420px;
        }

        .hero-main::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.96) 35%, rgba(255, 255, 255, 0.72) 65%, rgba(255, 255, 255, 0.45) 100%);
            border-radius: var(--radius-xl);
            z-index: 1;
        }

        .hero-main-content {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 20px;
            margin-bottom: 14px;
            border: 1px solid rgba(42, 109, 244, 0.15);
        }

        .hero-title {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .hero-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 520px;
            margin-bottom: 22px;
        }

        .hero-progress-wrap {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
            margin-bottom: 22px;
            background: rgba(255, 255, 255, 0.7);
            border-radius: var(--radius-md);
            padding: 16px 20px;
            border: 1px solid var(--border-light);
            max-width: 480px;
        }

        .progress-ring {
            position: relative;
            width: 88px;
            height: 88px;
            flex-shrink: 0;
        }

        .progress-ring svg {
            width: 88px;
            height: 88px;
            transform: rotate(-90deg);
        }

        .progress-ring .ring-bg {
            fill: none;
            stroke: var(--secondary);
            stroke-width: 8;
        }

        .progress-ring .ring-fill {
            fill: none;
            stroke: var(--primary);
            stroke-width: 8;
            stroke-linecap: round;
            stroke-dasharray: 283;
            stroke-dashoffset: calc(283 * (1 - 0.87));
            transition: stroke-dashoffset 1.2s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .progress-ring .ring-center {
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
        }

        .progress-ring .ring-center small {
            font-size: 11px;
            font-weight: 400;
            color: var(--text-secondary);
            display: block;
            text-align: center;
            line-height: 1.2;
        }

        .progress-info h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }

        .progress-info p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: var(--transition);
            min-height: 48px;
            min-width: 140px;
            text-align: center;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(31, 111, 235, 0.25);
        }

        .btn-primary:active {
            background: var(--primary-active);
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-primary:focus-visible {
            outline: 3px solid var(--primary-focus);
            outline-offset: 2px;
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }

        .btn-secondary:hover {
            background: rgba(42, 109, 244, 0.08);
            color: var(--primary);
            transform: translateY(-2px);
        }

        .btn-secondary:active {
            background: rgba(42, 109, 244, 0.15);
            transform: translateY(0);
        }

        .btn-secondary:focus-visible {
            outline: 3px solid var(--primary-focus);
            outline-offset: 2px;
        }

        .hero-trust {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            margin-top: 16px;
            position: relative;
            z-index: 2;
            font-size: 12px;
            color: var(--text-secondary);
        }

        .hero-trust span {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .hero-trust svg {
            width: 14px;
            height: 14px;
            color: var(--success);
            flex-shrink: 0;
        }

        /* Hero tiers preview */
        .hero-tiers {
            display: flex;
            flex-direction: column;
            gap: 12px;
            justify-content: center;
        }

        .hero-tier-card {
            background: var(--card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            gap: 14px;
            transition: var(--transition);
            cursor: pointer;
        }

        .hero-tier-card:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(42, 109, 244, 0.25);
            transform: translateY(-2px);
        }

        .hero-tier-card .tier-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }

        .hero-tier-card .tier-info h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 2px;
        }

        .hero-tier-card .tier-info p {
            font-size: 12px;
            color: var(--text-secondary);
            line-height: 1.45;
        }

        .hero-tier-card .tier-badge {
            margin-left: auto;
            font-size: 11px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 20px;
            background: var(--secondary);
            color: var(--text-secondary);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .hero-tier-card.featured .tier-badge {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ===== Sections general ===== */
        .section {
            padding: 40px 0;
            margin-bottom: 8px;
        }

        .section-head {
            margin-bottom: 28px;
        }

        .section-head h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }

        .section-head p {
            font-size: 14px;
            color: var(--text-secondary);
            max-width: 560px;
            line-height: 1.7;
        }

        .section-label {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 10px;
            letter-spacing: 0.04em;
        }

        /* ===== Metrics Panel ===== */
        .metrics-panel {
            background: var(--card);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            padding: 28px 32px;
            position: relative;
            overflow: hidden;
        }

        .metrics-panel::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), #4facfe, var(--primary));
            opacity: 0.6;
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .metric-item {
            text-align: center;
            padding: 12px 8px;
            border-right: 1px solid var(--border-light);
        }

        .metric-item:last-child {
            border-right: none;
        }

        .metric-number {
            font-size: 34px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 4px;
            letter-spacing: -0.02em;
        }

        .metric-label {
            font-size: 12px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .metric-desc {
            font-size: 11px;
            color: var(--text-muted);
            margin-top: 2px;
            line-height: 1.4;
        }

        /* ===== Chart bars ===== */
        .chart-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 24px;
        }

        .chart-card {
            background: #f8fafc;
            border-radius: var(--radius-md);
            padding: 18px 20px;
            border: 1px solid var(--border-light);
        }

        .chart-card h4 {
            font-size: 13px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 12px;
        }

        .chart-bar-row {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
        }

        .chart-bar-label {
            font-size: 12px;
            color: var(--text-secondary);
            min-width: 72px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .chart-bar-track {
            flex: 1;
            height: 8px;
            background: var(--secondary);
            border-radius: 4px;
            overflow: hidden;
        }

        .chart-bar-fill {
            height: 100%;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--primary), #4facfe);
            transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .chart-bar-value {
            font-size: 12px;
            font-weight: 600;
            color: var(--text);
            min-width: 36px;
            text-align: right;
        }

        /* ===== List cards ===== */
        .tier-showcase {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 24px;
            align-items: start;
        }

        .showcase-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .showcase-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 20px 22px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            transition: var(--transition);
            cursor: pointer;
        }

        .showcase-card:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(42, 109, 244, 0.2);
            transform: translateY(-2px);
        }

        .showcase-card-img {
            width: 84px;
            height: 68px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            border: 1px solid var(--border-light);
        }

        .showcase-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .showcase-card-body {
            flex: 1;
            min-width: 0;
        }

        .showcase-card-body h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
            line-height: 1.35;
        }

        .showcase-card-body p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .showcase-card-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            margin-top: 8px;
        }

        .tag {
            font-size: 11px;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: 20px;
            background: var(--primary-light);
            color: var(--primary);
            white-space: nowrap;
        }

        .tag-alt {
            background: rgba(22, 163, 74, 0.1);
            color: var(--success);
        }

        .tag-warm {
            background: rgba(245, 158, 11, 0.12);
            color: var(--warning);
        }

        .showcase-side {
            background: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 24px 22px;
        }

        .showcase-side h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 14px;
        }

        .hot-rank-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .hot-rank-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            background: #f8fafc;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            cursor: pointer;
            font-size: 13px;
        }

        .hot-rank-item:hover {
            background: var(--primary-light);
            border-color: rgba(42, 109, 244, 0.2);
        }

        .hot-rank-num {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--secondary);
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .hot-rank-item:nth-child(1) .hot-rank-num {
            background: rgba(245, 158, 11, 0.25);
            color: var(--warning);
        }

        .hot-rank-item:nth-child(2) .hot-rank-num {
            background: rgba(150, 150, 160, 0.2);
            color: var(--text-secondary);
        }

        .hot-rank-item:nth-child(3) .hot-rank-num {
            background: rgba(180, 120, 50, 0.2);
            color: #b87c32;
        }

        .hot-rank-name {
            flex: 1;
            font-weight: 500;
            color: var(--text);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .hot-rank-value {
            font-weight: 600;
            color: var(--primary);
            white-space: nowrap;
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .step-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 22px 20px;
            transition: var(--transition);
            position: relative;
        }

        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .step-number {
            font-size: 36px;
            font-weight: 700;
            color: var(--secondary);
            line-height: 1;
            margin-bottom: 10px;
            letter-spacing: -0.02em;
        }

        .step-card h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .step-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ===== Scenario ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .scenario-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 24px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            transition: var(--transition);
        }

        .scenario-card:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(42, 109, 244, 0.18);
        }

        .scenario-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }

        .scenario-card h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }

        .scenario-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(42, 109, 244, 0.22);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px 20px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            user-select: none;
            transition: var(--transition);
            min-height: 44px;
            width: 100%;
            text-align: left;
        }

        .faq-question:hover {
            background: rgba(42, 109, 244, 0.04);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            transition: var(--transition);
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 0 20px;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 20px 18px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 40px 0 20px;
        }

        .cta-panel {
            background: #0f1b2d;
            border-radius: var(--radius-xl);
            padding: 44px 36px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 16px 44px rgba(15, 27, 45, 0.2);
        }

        .cta-panel::before {
            content: '';
            position: absolute;
            top: 0;
            left: 10%;
            right: 10%;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--primary), #4facfe, transparent);
            border-radius: 2px;
        }

        .cta-panel .wave-decoration {
            position: absolute;
            bottom: 20px;
            left: 0;
            right: 0;
            display: flex;
            justify-content: center;
            gap: 4px;
            opacity: 0.15;
            pointer-events: none;
        }

        .cta-panel .wave-decoration span {
            width: 4px;
            border-radius: 2px;
            background: #4facfe;
            animation: wavePulse 1.6s ease-in-out infinite;
        }

        .cta-panel .wave-decoration span:nth-child(1) { height: 20px; animation-delay: 0s; }
        .cta-panel .wave-decoration span:nth-child(2) { height: 34px; animation-delay: 0.1s; }
        .cta-panel .wave-decoration span:nth-child(3) { height: 46px; animation-delay: 0.2s; }
        .cta-panel .wave-decoration span:nth-child(4) { height: 30px; animation-delay: 0.3s; }
        .cta-panel .wave-decoration span:nth-child(5) { height: 16px; animation-delay: 0.4s; }
        .cta-panel .wave-decoration span:nth-child(6) { height: 26px; animation-delay: 0.5s; }
        .cta-panel .wave-decoration span:nth-child(7) { height: 40px; animation-delay: 0.6s; }
        .cta-panel .wave-decoration span:nth-child(8) { height: 24px; animation-delay: 0.7s; }
        .cta-panel .wave-decoration span:nth-child(9) { height: 18px; animation-delay: 0.8s; }
        .cta-panel .wave-decoration span:nth-child(10) { height: 32px; animation-delay: 0.9s; }

        @keyframes wavePulse {
            0%, 100% { transform: scaleY(1); }
            50% { transform: scaleY(1.8); }
        }

        .cta-panel h2 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
            letter-spacing: -0.01em;
        }

        .cta-panel p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 480px;
            margin: 0 auto 24px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }

        .cta-actions {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .btn-white {
            background: #fff;
            color: var(--text);
            padding: 12px 26px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
            min-height: 48px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-white:hover {
            background: var(--secondary);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }

        .btn-outline-white {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.4);
            padding: 12px 26px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
            min-height: 48px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-outline-white:hover {
            border-color: rgba(255, 255, 255, 0.8);
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #fff;
            border-top: 1px solid var(--border-light);
            margin-top: 28px;
            padding: 40px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 28px;
            margin-bottom: 28px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-top: 10px;
            max-width: 260px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 12px;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            color: var(--text-secondary);
            padding: 5px 0;
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--primary);
            transform: translateX(3px);
        }

        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            padding: 5px 0;
        }

        .footer-contact-item span[aria-hidden="true"] {
            width: 20px;
            text-align: center;
            flex-shrink: 0;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 18px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-links {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-links a {
            color: var(--text-muted);
            transition: var(--transition);
            font-size: 12px;
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-wrapper {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .hero-tiers {
                flex-direction: row;
                flex-wrap: wrap;
            }

            .hero-tier-card {
                flex: 1;
                min-width: 200px;
            }

            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .metric-item:nth-child(2) {
                border-right: none;
            }

            .chart-row {
                grid-template-columns: 1fr;
            }

            .tier-showcase {
                grid-template-columns: 1fr;
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .scenario-grid {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                padding: 0 12px;
                top: 8px;
                margin-bottom: 16px;
            }

            .nav-panel {
                padding: 8px 12px;
                gap: 10px;
                border-radius: var(--radius-md);
            }

            .nav-cta {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-links {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding-top: 8px;
                border-top: 1px solid var(--border-light);
                margin-top: 4px;
            }

            .nav-links.open {
                display: flex;
            }

            .nav-link {
                justify-content: flex-start;
                width: 100%;
                padding: 10px 14px;
                min-height: 44px;
            }

            .nav-link.active::after {
                left: 14px;
                right: auto;
                bottom: 6px;
                width: 3px;
                height: auto;
                top: 10px;
                bottom: 10px;
                background: var(--primary);
                border-radius: 2px;
            }

            .hero-main {
                padding: 24px 20px;
                min-height: 380px;
            }

            .hero-title {
                font-size: 28px;
            }

            .hero-subtitle {
                font-size: 14px;
            }

            .hero-progress-wrap {
                gap: 14px;
                padding: 12px 14px;
            }

            .progress-ring {
                width: 70px;
                height: 70px;
            }

            .progress-ring svg {
                width: 70px;
                height: 70px;
            }

            .progress-ring .ring-center {
                font-size: 18px;
            }

            .btn {
                width: 100%;
                min-width: 0;
            }

            .hero-actions {
                flex-direction: column;
            }

            .hero-tiers {
                flex-direction: column;
            }

            .hero-tier-card {
                min-width: 0;
            }

            .section {
                padding: 28px 0;
            }

            .section-head h2 {
                font-size: 22px;
            }

            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }

            .metric-number {
                font-size: 26px;
            }

            .steps-grid {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .cta-panel {
                padding: 32px 20px;
            }

            .cta-panel h2 {
                font-size: 22px;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        @media (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: 1fr;
                gap: 6px;
            }

            .metric-item {
                border-right: none;
                border-bottom: 1px solid var(--border-light);
                padding: 8px;
            }

            .metric-item:last-child {
                border-bottom: none;
            }

            .hero-title {
                font-size: 24px;
            }

            .hero-badge {
                font-size: 11px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1f6feb;
            --primary-hover: #174ea6;
            --primary-active: #123f85;
            --primary-light: rgba(42, 109, 244, 0.08);
            --primary-focus: rgba(42, 109, 244, 0.35);
            --secondary: #e8eef7;
            --bg: #f5f7fb;
            --card: #ffffff;
            --text: #0f1b2d;
            --text-secondary: #5a6b85;
            --text-muted: #9aa8bf;
            --border: #dce5f2;
            --border-light: #e5eaf3;
            --success: #16a34a;
            --warning: #f59e0b;
            --danger: #dc2626;
            --radius-sm: 12px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --radius-xl: 22px;
            --shadow-sm: 0 2px 8px rgba(31, 60, 110, 0.06);
            --shadow-md: 0 6px 24px rgba(31, 60, 110, 0.08);
            --shadow-lg: 0 12px 36px rgba(31, 60, 110, 0.12);
            --font-family: 'Inter', 'Roboto', 'Hiragino Sans GB', 'HarmonyOS Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container-max: 1200px;
            --section-gap: 48px;
            --section-gap-mobile: 40px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 15px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--primary);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 16px;
            z-index: 100;
            padding: 0 20px;
            margin-bottom: 0;
        }

        .nav-panel {
            max-width: var(--container-max);
            margin: 0 auto;
            background-color: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: 0 4px 18px rgba(31, 60, 110, 0.06);
            border: 1px solid var(--border-light);
            padding: 12px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 17px;
            color: var(--text);
            white-space: nowrap;
        }

        .nav-brand:hover {
            color: var(--primary);
        }

        .nav-brand-icon {
            width: 34px;
            height: 34px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            border-radius: 10px;
            color: #fff;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            overflow-x: auto;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            background: transparent;
            border: 1px solid transparent;
            transition: var(--transition);
            min-height: 44px;
        }

        .nav-link:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .nav-link.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
            border-color: rgba(42, 109, 244, 0.15);
            position: relative;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-link .nav-icon {
            font-size: 14px;
            line-height: 1;
        }

        .nav-cta {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: var(--transition);
            min-height: 44px;
        }

        .nav-cta:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .nav-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            padding: 28px 0 0;
        }

        .breadcrumb-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .breadcrumb-left {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-secondary);
            flex-wrap: wrap;
        }

        .breadcrumb-left a {
            color: var(--text-secondary);
            font-weight: 500;
        }

        .breadcrumb-left a:hover {
            color: var(--primary);
        }

        .breadcrumb-left .sep {
            color: var(--text-muted);
        }

        .breadcrumb-left .current {
            color: var(--primary);
            font-weight: 600;
        }

        .breadcrumb-right {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .breadcrumb-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg);
            border-radius: var(--radius-sm);
            padding: 8px 14px;
            border: 1px solid var(--border);
            transition: var(--transition);
            min-width: 200px;
        }

        .breadcrumb-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(42, 109, 244, 0.18);
        }

        .breadcrumb-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 13px;
            color: var(--text);
            width: 100%;
            min-width: 140px;
        }

        .breadcrumb-search input::placeholder {
            color: var(--text-muted);
        }

        .breadcrumb-search svg {
            flex-shrink: 0;
            color: var(--text-muted);
        }

        /* ===== Hero Section ===== */
        .hero-section {
            padding: 28px 0 0;
        }

        .hero-card {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            min-height: 320px;
            display: flex;
            align-items: center;
            box-shadow: var(--shadow-md);
        }

        .hero-card::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.88) 40%, rgba(255, 255, 255, 0.55) 70%, rgba(255, 255, 255, 0.25) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 40px 44px;
            max-width: 680px;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 14px;
            border: 1px solid rgba(42, 109, 244, 0.15);
        }

        .hero-content h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: 14px;
            letter-spacing: -0.02em;
        }

        .hero-content .hero-sub {
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-secondary);
            margin-bottom: 24px;
            max-width: 560px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 26px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            white-space: nowrap;
            min-height: 48px;
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-primary:active {
            background: var(--primary-active);
            transform: translateY(0);
        }

        .btn-primary:focus-visible,
        .btn-outline:focus-visible {
            outline: 3px solid var(--primary-focus);
            outline-offset: 2px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 26px;
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            white-space: nowrap;
            min-height: 48px;
        }

        .btn-outline:hover {
            background: rgba(42, 109, 244, 0.08);
            color: var(--primary-hover);
            transform: translateY(-2px);
        }

        .btn-outline:active {
            background: rgba(42, 109, 244, 0.12);
            transform: translateY(0);
        }

        .hero-stats-row {
            display: flex;
            gap: 24px;
            margin-top: 22px;
            flex-wrap: wrap;
        }

        .hero-stat-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .hero-stat-item .stat-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--success);
            animation: pulse-dot 2s infinite;
        }

        .hero-stat-item .stat-dot.warning {
            background: var(--warning);
        }

        .hero-stat-item .stat-dot.blue {
            background: var(--primary);
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(0.8); }
        }

        /* ===== Main Content Layout ===== */
        .main-section {
            padding: 32px 0 0;
        }

        .content-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 24px;
            align-items: start;
        }

        /* ===== Left Main Panel ===== */
        .main-panel {
            background: var(--card);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 28px;
        }

        .panel-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 20px;
            padding-bottom: 18px;
            border-bottom: 1px solid var(--border-light);
        }

        .panel-header h2 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.01em;
        }

        .panel-header .panel-sub {
            font-size: 13px;
            color: var(--text-secondary);
        }

        .filter-bar {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .filter-chip {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 7px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg);
            border: 1px solid var(--border);
            transition: var(--transition);
            min-height: 36px;
            white-space: nowrap;
        }

        .filter-chip:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: rgba(42, 109, 244, 0.2);
        }

        .filter-chip.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            font-weight: 600;
        }

        .sort-bar {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 20px;
            padding: 10px 14px;
            background: var(--bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            flex-wrap: wrap;
        }

        .sort-bar label {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .sort-select {
            padding: 8px 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--card);
            color: var(--text);
            font-size: 13px;
            outline: none;
            transition: var(--transition);
            min-height: 40px;
            cursor: pointer;
        }

        .sort-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(42, 109, 244, 0.18);
        }

        .live-count {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--success);
            font-weight: 600;
            margin-left: auto;
        }

        .live-count .live-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--success);
            animation: pulse-dot 1.5s infinite;
        }

        /* ===== Live Stream Cards ===== */
        .live-card-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .live-card {
            display: grid;
            grid-template-columns: 180px 1fr;
            gap: 18px;
            background: var(--bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            padding: 16px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .live-card:hover {
            border-color: rgba(42, 109, 244, 0.25);
            box-shadow: var(--shadow-sm);
            transform: translateY(-1px);
        }

        .live-card-cover {
            border-radius: var(--radius-sm);
            overflow: hidden;
            aspect-ratio: 16/10;
            position: relative;
            background: var(--secondary);
        }

        .live-card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .live-badge {
            position: absolute;
            top: 10px;
            left: 10px;
            background: var(--danger);
            color: #fff;
            font-size: 11px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 10px;
            letter-spacing: 0.5px;
        }

        .live-badge.soon {
            background: var(--warning);
        }

        .live-badge.booked {
            background: var(--primary);
        }

        .live-card-body {
            display: flex;
            flex-direction: column;
            gap: 8px;
            min-width: 0;
        }

        .live-card-top {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .live-card-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.4;
        }

        .live-card-league {
            font-size: 11px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 3px 10px;
            border-radius: 10px;
            white-space: nowrap;
        }

        .live-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-secondary);
            flex-wrap: wrap;
        }

        .live-card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .live-card-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .live-card-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        .live-tag {
            font-size: 11px;
            color: var(--text-secondary);
            background: var(--card);
            border: 1px solid var(--border-light);
            padding: 3px 10px;
            border-radius: 10px;
            font-weight: 500;
        }

        .live-progress {
            height: 4px;
            background: var(--border-light);
            border-radius: 4px;
            overflow: hidden;
            margin-top: 2px;
        }

        .live-progress-bar {
            height: 100%;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--primary), #4a8df4);
            transition: width 0.6s ease;
        }

        .live-progress-bar.hot {
            background: linear-gradient(90deg, var(--warning), #fbbf24);
        }

        .live-progress-bar.urgent {
            background: linear-gradient(90deg, var(--danger), #f87171);
        }

        /* ===== Sidebar ===== */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .sidebar-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 20px;
        }

        .sidebar-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-light);
        }

        .hot-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .hot-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 10px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            cursor: pointer;
        }

        .hot-item:hover {
            background: var(--primary-light);
        }

        .hot-rank {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-muted);
            width: 28px;
            text-align: center;
            flex-shrink: 0;
        }

        .hot-rank.top1 { color: #f59e0b; }
        .hot-rank.top2 { color: #6b7280; }
        .hot-rank.top3 { color: #b45309; }

        .hot-info {
            flex: 1;
            min-width: 0;
        }

        .hot-info .hot-name {
            font-size: 13px;
            font-weight: 600;
            color: var(--text);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .hot-info .hot-meta {
            font-size: 11px;
            color: var(--text-secondary);
        }

        .hot-viewers {
            font-size: 12px;
            color: var(--text-secondary);
            font-weight: 500;
            flex-shrink: 0;
        }

        .quick-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .quick-link {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg);
            border: 1px solid transparent;
            transition: var(--transition);
            min-height: 44px;
        }

        .quick-link:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: rgba(42, 109, 244, 0.15);
        }

        .quick-link .ql-icon {
            font-size: 16px;
            flex-shrink: 0;
        }

        /* ===== Features Section ===== */
        .features-section {
            padding: var(--section-gap) 0 0;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .feature-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 24px 22px;
            transition: var(--transition);
        }

        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .feature-icon {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            border-radius: var(--radius-sm);
            color: var(--primary);
            font-size: 20px;
            margin-bottom: 14px;
        }

        .feature-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }

        .feature-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Process Section ===== */
        .process-section {
            padding: var(--section-gap) 0 0;
        }

        .process-card {
            background: var(--card);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 32px 28px;
        }

        .process-card h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }

        .process-card .process-sub {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 22px;
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .process-step {
            background: var(--bg);
            border-radius: var(--radius-md);
            padding: 18px 16px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .process-step:hover {
            border-color: rgba(42, 109, 244, 0.25);
            background: var(--primary-light);
        }

        .step-number {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            opacity: 0.35;
            margin-bottom: 8px;
            line-height: 1;
        }

        .process-step h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }

        .process-step p {
            font-size: 12px;
            color: var(--text-secondary);
            line-height: 1.55;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: var(--section-gap) 0 0;
        }

        .faq-card {
            background: var(--card);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 32px 28px;
        }

        .faq-card h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 20px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            background: var(--bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            background: rgba(42, 109, 244, 0.04);
            border-color: rgba(42, 109, 244, 0.15);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 16px 18px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            user-select: none;
            min-height: 44px;
            width: 100%;
            text-align: left;
        }

        .faq-question .faq-toggle-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--card);
            border-radius: 50%;
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 18px;
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 200px;
            padding: 0 18px 16px;
        }

        .faq-item.open .faq-toggle-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: var(--section-gap) 0 0;
        }

        .cta-panel {
            background: #0f1b2d;
            border-radius: var(--radius-xl);
            padding: 44px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-panel::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), #4a8df4, var(--primary));
            border-radius: 4px 4px 0 0;
        }

        .cta-panel::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(42, 109, 244, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-panel h2 {
            font-size: 26px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
            letter-spacing: -0.01em;
        }

        .cta-panel p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }

        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            background: #ffffff;
            color: var(--text);
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            white-space: nowrap;
            min-height: 48px;
        }

        .btn-white:hover {
            background: #e8eef7;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 255, 255, 0.15);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            background: transparent;
            color: rgba(255, 255, 255, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.4);
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            white-space: nowrap;
            min-height: 48px;
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.7);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            margin-top: var(--section-gap);
            padding: 0 0 32px;
        }

        .site-footer .container {
            background: var(--card);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 36px 32px 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 28px;
        }

        .footer-brand .nav-brand {
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 8px;
            transition: var(--transition);
            padding: 4px 0;
        }

        .footer-col a:hover {
            color: var(--primary);
        }

        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 8px;
            padding: 4px 0;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding-top: 20px;
            border-top: 1px solid var(--border-light);
            flex-wrap: wrap;
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-links {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 12px;
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .content-layout {
                grid-template-columns: 1fr;
            }
            .sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                padding: 0 12px;
                top: 10px;
            }
            .nav-panel {
                padding: 10px 14px;
                gap: 10px;
                flex-wrap: nowrap;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--card);
                border-radius: var(--radius-md);
                box-shadow: var(--shadow-lg);
                border: 1px solid var(--border-light);
                padding: 12px;
                flex-direction: column;
                gap: 4px;
                margin-top: 8px;
                z-index: 99;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .nav-cta {
                display: none;
            }
            .nav-panel {
                position: relative;
            }
            .nav-brand {
                font-size: 15px;
            }
            .nav-brand-icon {
                width: 30px;
                height: 30px;
                border-radius: 8px;
            }
            .hero-card {
                min-height: 260px;
            }
            .hero-content {
                padding: 28px 22px;
            }
            .hero-content h1 {
                font-size: 26px;
            }
            .hero-content .hero-sub {
                font-size: 14px;
            }
            .hero-stats-row {
                gap: 14px;
            }
            .main-panel {
                padding: 18px 16px;
            }
            .panel-header h2 {
                font-size: 18px;
            }
            .live-card {
                grid-template-columns: 1fr;
                gap: 12px;
                padding: 14px;
            }
            .live-card-cover {
                aspect-ratio: 16/9;
            }
            .live-card-title {
                font-size: 15px;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .feature-card {
                padding: 18px 16px;
            }
            .process-steps {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .process-card {
                padding: 22px 18px;
            }
            .process-card h2 {
                font-size: 19px;
            }
            .faq-card {
                padding: 22px 18px;
            }
            .faq-card h2 {
                font-size: 19px;
            }
            .faq-question {
                font-size: 14px;
                padding: 13px 14px;
            }
            .cta-panel {
                padding: 32px 20px;
            }
            .cta-panel h2 {
                font-size: 22px;
            }
            .cta-panel p {
                font-size: 14px;
            }
            .btn-primary,
            .btn-outline,
            .btn-white,
            .btn-ghost {
                width: 100%;
                justify-content: center;
                min-height: 48px;
                padding: 12px 20px;
            }
            .hero-actions,
            .cta-actions {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .footer-links {
                gap: 10px;
            }
            .breadcrumb-card {
                padding: 14px 16px;
                flex-direction: column;
                align-items: flex-start;
            }
            .breadcrumb-search {
                width: 100%;
                min-width: 0;
            }
            .breadcrumb-search input {
                min-width: 0;
            }
            .filter-bar {
                gap: 6px;
            }
            .filter-chip {
                padding: 6px 12px;
                font-size: 12px;
                min-height: 34px;
            }
            .sort-bar {
                gap: 6px;
            }
            .section-gap-responsive {
                padding-top: 40px !important;
            }
            :root {
                --section-gap: 40px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }
            .hero-content {
                padding: 22px 16px;
            }
            .hero-content h1 {
                font-size: 24px;
            }
            .hero-stats-row {
                gap: 10px;
                font-size: 12px;
            }
            .main-panel {
                padding: 14px 12px;
            }
            .live-card {
                padding: 10px;
            }
            .live-card-desc {
                font-size: 12px;
            }
            .live-card-meta {
                font-size: 11px;
                gap: 8px;
            }
            .site-footer .container {
                padding: 24px 18px 18px;
            }
            .footer-brand p {
                font-size: 12px;
            }
            .cta-panel h2 {
                font-size: 20px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #1f6feb;
            --primary-hover: #174ea6;
            --primary-active: #123f85;
            --primary-light: rgba(42, 109, 244, 0.08);
            --primary-focus: rgba(42, 109, 244, 0.35);
            --secondary: #e8eef7;
            --bg: #f5f7fb;
            --card: #ffffff;
            --text: #0f1b2d;
            --text-secondary: #5a6b85;
            --text-muted: #9aa8bf;
            --border: #dce5f2;
            --border-light: #e5eaf3;
            --success: #16a34a;
            --warning: #f59e0b;
            --danger: #dc2626;
            --radius-sm: 12px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --radius-xl: 22px;
            --shadow-sm: 0 2px 8px rgba(31, 60, 110, 0.06);
            --shadow-md: 0 6px 24px rgba(31, 60, 110, 0.08);
            --shadow-lg: 0 12px 36px rgba(31, 60, 110, 0.12);
            --font-family: 'Inter', 'Roboto', 'Hiragino Sans GB', 'HarmonyOS Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container-max: 1200px;
            --section-gap: 56px;
            --section-gap-mobile: 40px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 15px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            margin: 0;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 16px;
            z-index: 100;
            padding: 0 20px;
            margin-bottom: 0;
        }
        .nav-panel {
            max-width: var(--container-max);
            margin: 0 auto;
            background-color: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: 0 4px 18px rgba(31, 60, 110, 0.06);
            border: 1px solid var(--border-light);
            padding: 12px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 17px;
            color: var(--text);
            white-space: nowrap;
        }
        .nav-brand:hover {
            color: var(--primary);
        }
        .nav-brand-icon {
            width: 34px;
            height: 34px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            border-radius: 10px;
            color: #fff;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            overflow-x: auto;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
        }
        .nav-links::-webkit-scrollbar {
            display: none;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            background: transparent;
            border: 1px solid transparent;
            transition: var(--transition);
            min-height: 44px;
        }
        .nav-link:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .nav-link.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
            border-color: rgba(42, 109, 244, 0.15);
            position: relative;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-link .nav-icon {
            font-size: 14px;
            line-height: 1;
        }
        .nav-cta {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: var(--transition);
            min-height: 44px;
        }
        .nav-cta:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .nav-cta:active {
            background: var(--primary-active);
            transform: translateY(0);
        }
        .nav-cta:focus-visible,
        .nav-link:focus-visible,
        .nav-brand:focus-visible {
            outline: 3px solid var(--primary-focus);
            outline-offset: 2px;
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            color: var(--text);
            border: 1px solid var(--border);
            background: var(--card);
            flex-shrink: 0;
        }
        .nav-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-wrapper {
            padding-top: 24px;
            padding-bottom: 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .separator {
            color: var(--text-muted);
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* ===== Hero Section ===== */
        .hero-category {
            position: relative;
            margin-top: 16px;
            border-radius: var(--radius-xl);
            overflow: hidden;
            background: var(--card);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-md);
        }
        .hero-category-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.14;
            z-index: 0;
        }
        .hero-category-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.92) 0%, rgba(245, 247, 251, 0.78) 55%, rgba(232, 238, 247, 0.65) 100%);
            z-index: 1;
        }
        .hero-category-content {
            position: relative;
            z-index: 2;
            padding: 48px 40px 40px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .hero-category-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            width: fit-content;
            border: 1px solid rgba(42, 109, 244, 0.15);
        }
        .hero-category h1 {
            font-size: 36px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
            margin: 0;
            letter-spacing: -0.02em;
        }
        .hero-category .hero-sub {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 680px;
            margin: 0;
        }
        .hero-search {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 8px;
            max-width: 560px;
        }
        .hero-search input {
            flex: 1;
            min-width: 220px;
            padding: 12px 18px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: var(--card);
            font-size: 14px;
            color: var(--text);
            transition: var(--transition);
            min-height: 48px;
        }
        .hero-search input::placeholder {
            color: var(--text-muted);
        }
        .hero-search input:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(42, 109, 244, 0.18);
        }
        .hero-search .btn-search {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
            min-height: 48px;
            white-space: nowrap;
        }
        .hero-search .btn-search:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .hero-search .btn-search:active {
            background: var(--primary-active);
            transform: translateY(0);
        }
        .hero-stats-mini {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            margin-top: 4px;
        }
        .hero-stat-mini {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-secondary);
        }
        .hero-stat-mini strong {
            color: var(--primary);
            font-weight: 700;
            font-size: 16px;
        }

        /* ===== Main Content Area ===== */
        .main-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 24px;
            margin-top: 32px;
            align-items: start;
        }
        .content-panel {
            background: var(--card);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
        }
        .content-panel-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 20px;
        }
        .content-panel-header h2 {
            font-size: 20px;
            font-weight: 700;
            margin: 0;
            color: var(--text);
        }
        .filter-bar {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-select {
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: var(--card);
            font-size: 13px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition);
            min-height: 44px;
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%235a6b85' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 12px center;
            padding-right: 32px;
        }
        .filter-select:hover {
            border-color: var(--primary);
        }
        .filter-select:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(42, 109, 244, 0.18);
        }
        .filter-btn {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: var(--card);
            font-size: 13px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition);
            min-height: 44px;
            white-space: nowrap;
        }
        .filter-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .filter-btn.active {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        /* ===== Ranking Cards ===== */
        .rank-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .rank-card {
            display: flex;
            gap: 16px;
            padding: 16px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            background: var(--card);
            transition: var(--transition);
        }
        .rank-card:hover {
            border-color: rgba(42, 109, 244, 0.25);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .rank-card-cover {
            width: 130px;
            height: 100px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--secondary);
        }
        .rank-card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .rank-card-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 6px;
            min-width: 0;
        }
        .rank-card-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
        }
        .rank-card-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin: 0;
            line-height: 1.4;
        }
        .rank-card-status {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12px;
            color: var(--success);
            background: rgba(22, 163, 74, 0.08);
            padding: 3px 10px;
            border-radius: 20px;
            font-weight: 600;
            white-space: nowrap;
        }
        .rank-card-status.updated {
            color: var(--primary);
            background: var(--primary-light);
        }
        .rank-card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .rank-card-tags {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .rank-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 500;
            color: var(--primary);
            background: var(--primary-light);
            padding: 3px 10px;
            border-radius: 20px;
            border: 1px solid rgba(42, 109, 244, 0.12);
        }
        .rank-card-footer {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 4px;
        }
        .rank-heat {
            flex: 1;
            max-width: 180px;
            height: 4px;
            background: var(--border-light);
            border-radius: 2px;
            overflow: hidden;
        }
        .rank-heat-bar {
            height: 100%;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.6s ease;
        }
        .rank-heat-label {
            font-size: 11px;
            color: var(--text-muted);
            white-space: nowrap;
        }

        /* ===== Sidebar ===== */
        .sidebar-panel {
            background: var(--card);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            padding: 24px 20px;
            position: sticky;
            top: 90px;
        }
        .sidebar-panel h3 {
            font-size: 17px;
            font-weight: 700;
            margin: 0 0 16px;
            color: var(--text);
        }
        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .sidebar-item {
            display: flex;
            gap: 10px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            background: var(--bg);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .sidebar-item:hover {
            background: var(--primary-light);
            border-color: rgba(42, 109, 244, 0.18);
        }
        .sidebar-item-rank {
            width: 26px;
            height: 26px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
            background: var(--primary);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .sidebar-item-rank.top1 {
            background: #f59e0b;
        }
        .sidebar-item-rank.top2 {
            background: #94a3b8;
        }
        .sidebar-item-rank.top3 {
            background: #c8815a;
        }
        .sidebar-item-info {
            flex: 1;
            min-width: 0;
        }
        .sidebar-item-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            margin: 0;
        }
        .sidebar-item-meta {
            font-size: 11px;
            color: var(--text-muted);
        }
        .sidebar-divider {
            height: 1px;
            background: var(--border-light);
            margin: 20px 0;
        }
        .sidebar-shortcuts {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-shortcut {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            color: var(--text-secondary);
            background: var(--bg);
            border: 1px solid var(--border-light);
            padding: 6px 12px;
            border-radius: 20px;
            transition: var(--transition);
            min-height: 36px;
        }
        .sidebar-shortcut:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: rgba(42, 109, 244, 0.2);
        }

        /* ===== Data Highlights Section ===== */
        .data-highlights {
            margin-top: 40px;
            background: var(--card);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            padding: 32px 28px;
        }
        .data-highlights h2 {
            font-size: 22px;
            font-weight: 700;
            margin: 0 0 20px;
            color: var(--text);
        }
        .highlight-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 16px;
        }
        .highlight-card {
            background: var(--bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            padding: 20px 18px;
            transition: var(--transition);
        }
        .highlight-card:hover {
            border-color: rgba(42, 109, 244, 0.2);
            box-shadow: var(--shadow-sm);
        }
        .highlight-num {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }
        .highlight-unit {
            font-size: 13px;
            color: var(--text-secondary);
            margin-left: 4px;
        }
        .highlight-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-top: 4px;
        }
        .highlight-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-top: 4px;
        }
        .highlight-progress {
            height: 5px;
            background: var(--border-light);
            border-radius: 3px;
            margin-top: 12px;
            overflow: hidden;
        }
        .highlight-progress-bar {
            height: 100%;
            background: var(--primary);
            border-radius: 3px;
        }

        /* ===== Usage Scenarios ===== */
        .scenarios-section {
            margin-top: 40px;
            background: var(--card);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            padding: 32px 28px;
        }
        .scenarios-section h2 {
            font-size: 22px;
            font-weight: 700;
            margin: 0 0 20px;
            color: var(--text);
        }
        .scenario-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 16px;
        }
        .scenario-step {
            background: var(--bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            padding: 20px 18px;
            transition: var(--transition);
        }
        .scenario-step:hover {
            border-color: rgba(42, 109, 244, 0.2);
            box-shadow: var(--shadow-sm);
        }
        .scenario-step-num {
            font-size: 28px;
            font-weight: 700;
            color: rgba(31, 111, 235, 0.18);
            line-height: 1;
            margin-bottom: 10px;
        }
        .scenario-step-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 6px;
        }
        .scenario-step-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0;
        }

        /* ===== FAQ ===== */
        .faq-section {
            margin-top: 40px;
            background: var(--card);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            padding: 32px 28px;
        }
        .faq-section h2 {
            font-size: 22px;
            font-weight: 700;
            margin: 0 0 20px;
            color: var(--text);
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            overflow: hidden;
        }
        .faq-item:hover {
            background: rgba(42, 109, 244, 0.04);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 16px 18px;
            cursor: pointer;
            font-weight: 600;
            font-size: 15px;
            color: var(--text);
            transition: var(--transition);
            min-height: 48px;
            user-select: none;
            width: 100%;
            text-align: left;
            background: transparent;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--card);
            border: 1px solid var(--border);
            font-size: 16px;
            color: var(--primary);
            transition: var(--transition);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 18px 16px;
        }
        .faq-item.open .faq-icon {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== CTA Section ===== */
        .cta-section {
            margin-top: 40px;
            background: var(--text);
            border-radius: var(--radius-xl);
            padding: 48px 36px;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .cta-wave {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            opacity: 0.25;
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 16px;
        }
        .cta-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin: 0;
        }
        .cta-content p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.78);
            margin: 0;
            max-width: 520px;
            line-height: 1.7;
        }
        .cta-buttons {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: center;
            margin-top: 8px;
        }
        .cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            background: #fff;
            color: var(--text);
            font-size: 14px;
            font-weight: 700;
            transition: var(--transition);
            min-height: 48px;
        }
        .cta-primary:hover {
            background: var(--secondary);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
        }
        .cta-secondary {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            background: transparent;
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border: 1px solid rgba(255, 255, 255, 0.35);
            transition: var(--transition);
            min-height: 48px;
        }
        .cta-secondary:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: #fff;
            color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            margin-top: 48px;
            background: var(--card);
            border-radius: var(--radius-xl) var(--radius-xl) 0 0;
            border: 1px solid var(--border-light);
            padding: 44px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
            gap: 28px;
        }
        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 12px 0 0;
            max-width: 260px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 12px;
        }
        .footer-col {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col a {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .footer-col a:hover {
            color: var(--primary);
        }
        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .footer-bottom {
            margin-top: 32px;
            padding-top: 16px;
            border-top: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
        }
        .footer-links {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 12px;
            color: var(--text-muted);
        }
        .footer-links a {
            font-size: 12px;
            color: var(--text-muted);
        }
        .footer-links a:hover {
            color: var(--primary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .main-layout {
                grid-template-columns: 1fr;
            }
            .sidebar-panel {
                position: static;
                top: auto;
            }
            .hero-category h1 {
                font-size: 30px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .site-header {
                padding: 0 12px;
            }
            .nav-panel {
                padding: 10px 14px;
                flex-wrap: wrap;
                gap: 10px;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .nav-links {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding-top: 8px;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-link {
                width: 100%;
                justify-content: flex-start;
            }
            .hero-category-content {
                padding: 32px 20px 28px;
            }
            .hero-category h1 {
                font-size: 28px;
            }
            .hero-category .hero-sub {
                font-size: 14px;
            }
            .hero-search {
                flex-direction: column;
            }
            .hero-search input {
                width: 100%;
                min-width: auto;
            }
            .hero-search .btn-search {
                width: 100%;
                justify-content: center;
            }
            .content-panel {
                padding: 20px 16px;
            }
            .rank-card {
                flex-direction: column;
            }
            .rank-card-cover {
                width: 100%;
                height: 160px;
            }
            .data-highlights,
            .scenarios-section,
            .faq-section {
                padding: 24px 16px;
            }
            .cta-section {
                padding: 32px 20px;
            }
            .cta-content h2 {
                font-size: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-category-content {
                padding: 24px 16px 20px;
            }
            .hero-category h1 {
                font-size: 24px;
            }
            .hero-category-tag {
                font-size: 11px;
                padding: 4px 10px;
            }
            .content-panel-header {
                flex-direction: column;
                align-items: flex-start;
            }
            .rank-card-title {
                font-size: 15px;
            }
            .highlight-grid,
            .scenario-steps {
                grid-template-columns: 1fr;
            }
            .highlight-num {
                font-size: 28px;
            }
            .filter-bar {
                width: 100%;
                overflow-x: auto;
                flex-wrap: nowrap;
                padding-bottom: 4px;
            }
            .filter-select,
            .filter-btn {
                flex-shrink: 0;
            }
            .cta-buttons {
                flex-direction: column;
                width: 100%;
            }
            .cta-primary,
            .cta-secondary {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #1f6feb;
            --primary-hover: #174ea6;
            --primary-active: #123f85;
            --primary-light: rgba(42, 109, 244, 0.08);
            --primary-focus: rgba(42, 109, 244, 0.35);
            --secondary: #e8eef7;
            --bg: #f5f7fb;
            --card: #ffffff;
            --text: #0f1b2d;
            --text-secondary: #5a6b85;
            --text-muted: #9aa8bf;
            --border: #dce5f2;
            --border-light: #e5eaf3;
            --success: #16a34a;
            --warning: #f59e0b;
            --danger: #dc2626;
            --radius-sm: 12px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --radius-xl: 22px;
            --shadow-sm: 0 2px 8px rgba(31, 60, 110, 0.06);
            --shadow-md: 0 6px 24px rgba(31, 60, 110, 0.08);
            --shadow-lg: 0 12px 36px rgba(31, 60, 110, 0.12);
            --font-family: 'Inter', 'Roboto', 'Hiragino Sans GB', 'HarmonyOS Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container-max: 1200px;
            --section-gap: 48px;
            --section-gap-mobile: 40px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 15px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            margin: 0;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 16px;
            z-index: 100;
            padding: 0 20px;
            margin-bottom: 0;
        }
        .nav-panel {
            max-width: var(--container-max);
            margin: 0 auto;
            background-color: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: 0 4px 18px rgba(31, 60, 110, 0.06);
            border: 1px solid var(--border-light);
            padding: 12px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 17px;
            color: var(--text);
            white-space: nowrap;
        }
        .nav-brand:hover {
            color: var(--primary);
        }
        .nav-brand-icon {
            width: 34px;
            height: 34px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            border-radius: 10px;
            color: #fff;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            overflow-x: auto;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
        }
        .nav-links::-webkit-scrollbar {
            display: none;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            background: transparent;
            border: 1px solid transparent;
            transition: var(--transition);
            min-height: 44px;
        }
        .nav-link:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .nav-link.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
            border-color: rgba(42, 109, 244, 0.15);
            position: relative;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-link .nav-icon {
            font-size: 14px;
            line-height: 1;
        }
        .nav-cta {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: var(--transition);
            min-height: 44px;
        }
        .nav-cta:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .nav-cta:active {
            background: var(--primary-active);
            transform: translateY(0);
        }
        .nav-cta:focus-visible {
            outline: 3px solid var(--primary-focus);
            outline-offset: 2px;
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            color: var(--text);
            flex-shrink: 0;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .nav-toggle:focus-visible {
            outline: 3px solid var(--primary-focus);
            outline-offset: 2px;
        }

        /* ===== Breadcrumb Banner ===== */
        .page-banner {
            padding: 32px 0 8px;
        }
        .page-banner-inner {
            background: linear-gradient(135deg, #f8fafd 0%, #eef3fa 100%);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .separator {
            color: var(--text-muted);
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }
        .banner-search {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .banner-search input {
            width: 240px;
            height: 44px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            padding: 0 16px;
            font-size: 14px;
            color: var(--text);
            background: var(--card);
            transition: var(--transition);
            outline: none;
        }
        .banner-search input::placeholder {
            color: var(--text-muted);
        }
        .banner-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px var(--primary-focus);
        }
        .banner-search button {
            height: 44px;
            padding: 0 20px;
            border-radius: var(--radius-sm);
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .banner-search button:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
        }
        .banner-search button:active {
            background: var(--primary-active);
            transform: translateY(0);
        }

        /* ===== Page Title Section ===== */
        .page-title-section {
            padding: 20px 0 32px;
        }
        .page-title-inner {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .page-title-left h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 8px;
            line-height: 1.3;
        }
        .page-title-left p {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 0;
            max-width: 560px;
            line-height: 1.7;
        }
        .page-title-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            white-space: nowrap;
        }
        .page-title-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--success);
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.4); }
        }

        /* ===== Main Content Layout ===== */
        .main-content {
            padding: 0 0 56px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 28px;
            align-items: start;
        }

        /* Left panel */
        .content-panel {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }
        .panel-filters {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-light);
            flex-wrap: wrap;
        }
        .filter-group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-tag {
            padding: 7px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg);
            border: 1px solid var(--border);
            transition: var(--transition);
            cursor: pointer;
            white-space: nowrap;
            min-height: 36px;
            display: inline-flex;
            align-items: center;
        }
        .filter-tag:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: rgba(42, 109, 244, 0.2);
        }
        .filter-tag.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            font-weight: 600;
        }
        .sort-select {
            height: 40px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            padding: 0 12px;
            font-size: 13px;
            color: var(--text);
            background: var(--card);
            outline: none;
            transition: var(--transition);
            cursor: pointer;
            min-width: 140px;
        }
        .sort-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px var(--primary-focus);
        }

        /* Topic list cards */
        .topic-list {
            padding: 8px 24px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .topic-card {
            display: flex;
            gap: 20px;
            padding: 18px 0;
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
            border-radius: var(--radius-md);
            padding-left: 12px;
            padding-right: 12px;
            margin: 0 -12px;
            cursor: pointer;
            position: relative;
        }
        .topic-card:last-child {
            border-bottom: none;
        }
        .topic-card:hover {
            background: rgba(42, 109, 244, 0.03);
            transform: translateX(4px);
        }
        .topic-card-image {
            width: 160px;
            height: 110px;
            border-radius: var(--radius-md);
            overflow: hidden;
            flex-shrink: 0;
            position: relative;
        }
        .topic-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .topic-card:hover .topic-card-image img {
            transform: scale(1.05);
        }
        .topic-card-image .image-tag {
            position: absolute;
            bottom: 8px;
            left: 8px;
            padding: 3px 10px;
            background: rgba(15, 27, 45, 0.75);
            color: #fff;
            border-radius: 999px;
            font-size: 11px;
            font-weight: 500;
            backdrop-filter: blur(4px);
        }
        .topic-card-body {
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .topic-card-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 6px;
            line-height: 1.4;
        }
        .topic-card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0 0 10px;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .topic-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .topic-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }
        .topic-tag {
            padding: 3px 10px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            background: var(--primary-light);
            color: var(--primary);
            white-space: nowrap;
        }
        .topic-time {
            font-size: 12px;
            color: var(--text-muted);
            white-space: nowrap;
        }
        .topic-status {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 600;
            color: var(--success);
            white-space: nowrap;
        }
        .topic-status .status-dot {
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--success);
        }
        .topic-heat-bar {
            margin-top: 8px;
            height: 4px;
            background: var(--border-light);
            border-radius: 2px;
            overflow: hidden;
        }
        .topic-heat-bar .heat-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--primary), #4d8af0);
            border-radius: 2px;
            transition: width 0.6s ease;
        }

        /* Sidebar */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .sidebar-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 20px;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 .icon {
            color: var(--primary);
        }
        .hot-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
            cursor: pointer;
        }
        .hot-item:last-child {
            border-bottom: none;
        }
        .hot-item:hover {
            padding-left: 4px;
        }
        .hot-rank {
            width: 24px;
            height: 24px;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .hot-rank.top1 {
            background: #fee2e2;
            color: #dc2626;
        }
        .hot-rank.top2 {
            background: #fef3c7;
            color: #d97706;
        }
        .hot-rank.top3 {
            background: #e0e7ff;
            color: #4f46e5;
        }
        .hot-rank.normal {
            background: var(--bg);
            color: var(--text-muted);
        }
        .hot-text {
            font-size: 13px;
            font-weight: 500;
            color: var(--text);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .hot-count {
            font-size: 11px;
            color: var(--text-muted);
            margin-left: auto;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .quick-link {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 0;
            font-size: 13px;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .quick-link:last-child {
            border-bottom: none;
        }
        .quick-link:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .quick-link .arrow {
            margin-left: auto;
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ===== Features Section ===== */
        .features-section {
            padding: 48px 0;
        }
        .section-header {
            margin-bottom: 28px;
        }
        .section-header h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 8px;
            line-height: 1.35;
        }
        .section-header p {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 0;
            max-width: 640px;
            line-height: 1.7;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .feature-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: rgba(42, 109, 244, 0.2);
        }
        .feature-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            margin-bottom: 14px;
            font-size: 20px;
        }
        .feature-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 8px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.65;
        }
        .feature-card .feature-data {
            display: flex;
            gap: 16px;
            margin-top: 14px;
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
            flex-wrap: wrap;
        }
        .feature-data span {
            font-size: 13px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .feature-data strong {
            color: var(--primary);
            font-weight: 700;
        }

        /* ===== Steps Section ===== */
        .steps-section {
            padding: 48px 0;
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-xl);
            margin-bottom: 48px;
            box-shadow: var(--shadow-sm);
        }
        .steps-section-inner {
            padding: 32px;
        }
        .steps-row {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            scrollbar-width: thin;
            padding-bottom: 8px;
        }
        .step-card {
            min-width: 260px;
            background: var(--bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 20px;
            flex-shrink: 0;
            transition: var(--transition);
        }
        .step-card:hover {
            background: var(--card);
            box-shadow: var(--shadow-md);
            border-color: rgba(42, 109, 244, 0.2);
        }
        .step-number {
            font-size: 36px;
            font-weight: 800;
            color: rgba(42, 109, 244, 0.15);
            line-height: 1;
            margin-bottom: 10px;
        }
        .step-card h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 6px;
        }
        .step-card p {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        /* ===== Testimonials Section ===== */
        .testimonials-section {
            padding: 48px 0;
        }
        .testimonial-cards {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .testimonial-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .testimonial-quote {
            font-size: 48px;
            color: var(--primary-light);
            line-height: 1;
            margin-bottom: 8px;
            font-family: serif;
        }
        .testimonial-text {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.65;
            margin: 0 0 14px;
        }
        .testimonial-result {
            display: inline-block;
            padding: 5px 12px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 14px;
        }
        .testimonial-user {
            display: flex;
            align-items: center;
            gap: 10px;
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }
        .testimonial-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            flex-shrink: 0;
        }
        .testimonial-user-info span {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text);
        }
        .testimonial-user-info small {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ===== Capability Tags Section ===== */
        .tags-section {
            padding: 48px 0;
        }
        .tags-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .capability-tag {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .capability-tag:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(42, 109, 244, 0.2);
            transform: translateY(-2px);
        }
        .capability-tag .tag-icon {
            font-size: 18px;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .capability-tag h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 4px;
        }
        .capability-tag p {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.55;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 48px 0;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(42, 109, 244, 0.2);
            background: rgba(42, 109, 244, 0.02);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            gap: 12px;
            transition: var(--transition);
            min-height: 56px;
            text-align: left;
            width: 100%;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-toggle-icon {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg);
            color: var(--text-secondary);
            font-size: 16px;
            font-weight: 700;
            flex-shrink: 0;
            transition: var(--transition);
        }
        .faq-item.open .faq-toggle-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            padding: 0 20px;
            overflow: hidden;
            transition: all 0.3s ease;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }

        /* ===== CTA Panel ===== */
        .cta-panel {
            background: #0f1b2d;
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            margin: 32px 0 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-panel::before {
            content: '';
            position: absolute;
            top: -40px;
            left: 50%;
            transform: translateX(-50%);
            width: 500px;
            height: 80px;
            background: radial-gradient(ellipse at center, rgba(42, 109, 244, 0.25) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-panel h2 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 12px;
            position: relative;
        }
        .cta-panel p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            margin: 0 0 24px;
            position: relative;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
            position: relative;
        }
        .cta-btn-primary {
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            background: #fff;
            color: #0f1b2d;
            font-size: 15px;
            font-weight: 700;
            transition: var(--transition);
            min-height: 46px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .cta-btn-primary:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(42, 109, 244, 0.35);
        }
        .cta-btn-secondary {
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.35);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            min-height: 46px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .cta-btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.6);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-sm);
            padding: 40px 32px 20px;
            margin: 0 20px 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 28px;
        }
        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 12px 0 0;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 12px;
        }
        .footer-col a {
            display: block;
            font-size: 13px;
            color: var(--text-secondary);
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary);
        }
        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            padding: 4px 0;
        }
        .footer-contact-item span:first-child {
            font-size: 14px;
            color: var(--primary);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 16px;
            border-top: 1px solid var(--border-light);
            font-size: 12px;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 10px;
        }
        .footer-links {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 12px;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                flex-direction: row;
                flex-wrap: wrap;
                gap: 16px;
            }
            .sidebar-card {
                flex: 1;
                min-width: 280px;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .tags-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonial-cards {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--card);
                border-radius: var(--radius-md);
                border: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                padding: 12px;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                margin-top: 8px;
                z-index: 99;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-link {
                min-height: 44px;
                width: 100%;
                border-radius: var(--radius-sm);
                justify-content: flex-start;
            }
            .nav-link.active::after {
                left: 14px;
                right: auto;
                bottom: 8px;
                top: 8px;
                width: 3px;
                height: auto;
                border-radius: 2px;
            }
            .nav-cta {
                display: none;
            }
            .nav-panel {
                position: relative;
                flex-wrap: wrap;
            }
            .page-banner-inner {
                flex-direction: column;
                align-items: stretch;
            }
            .banner-search input {
                width: 100%;
            }
            .banner-search {
                flex-direction: column;
            }
            .banner-search button {
                width: 100%;
                justify-content: center;
            }
            .topic-card {
                flex-direction: column;
            }
            .topic-card-image {
                width: 100%;
                height: 180px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .tags-grid {
                grid-template-columns: 1fr;
            }
            .page-title-left h1 {
                font-size: 24px;
            }
            .section-header h2 {
                font-size: 20px;
            }
            .cta-panel {
                padding: 32px 20px;
            }
            .cta-panel h2 {
                font-size: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .steps-section-inner {
                padding: 20px;
            }
            .sidebar {
                flex-direction: column;
            }
            .sidebar-card {
                min-width: 100%;
            }
            .site-header {
                padding: 0 12px;
                top: 8px;
            }
            .nav-panel {
                padding: 10px 14px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }
        @media (max-width: 520px) {
            .page-title-left h1 {
                font-size: 20px;
            }
            .topic-card-image {
                height: 140px;
            }
            .panel-filters {
                flex-direction: column;
                align-items: stretch;
            }
            .sort-select {
                width: 100%;
            }
            .filter-group {
                overflow-x: auto;
                flex-wrap: nowrap;
                padding-bottom: 4px;
            }
            .filter-tag {
                flex-shrink: 0;
            }
            .topic-list {
                padding: 8px 16px;
            }
            .topic-card {
                padding: 14px 0;
            }
            .cta-btn-primary,
            .cta-btn-secondary {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category6 */
:root {
            --primary: #1f6feb;
            --primary-hover: #174ea6;
            --primary-active: #123f85;
            --primary-light: rgba(42, 109, 244, 0.08);
            --primary-focus: rgba(42, 109, 244, 0.35);
            --secondary: #e8eef7;
            --bg: #f5f7fb;
            --card: #ffffff;
            --text: #0f1b2d;
            --text-secondary: #5a6b85;
            --text-muted: #9aa8bf;
            --border: #dce5f2;
            --border-light: #e5eaf3;
            --success: #16a34a;
            --warning: #f59e0b;
            --danger: #dc2626;
            --radius-sm: 12px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --radius-xl: 22px;
            --shadow-sm: 0 2px 8px rgba(31, 60, 110, 0.06);
            --shadow-md: 0 6px 24px rgba(31, 60, 110, 0.08);
            --shadow-lg: 0 12px 36px rgba(31, 60, 110, 0.12);
            --font-family: 'Inter', 'Roboto', 'Hiragino Sans GB', 'HarmonyOS Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container-max: 1200px;
            --section-gap: 56px;
            --section-gap-mobile: 40px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 15px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            margin: 0;
            padding: 0;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 16px;
            z-index: 100;
            padding: 0 20px;
            margin-bottom: 24px;
        }
        .nav-panel {
            max-width: var(--container-max);
            margin: 0 auto;
            background-color: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: 0 4px 18px rgba(31, 60, 110, 0.06);
            border: 1px solid var(--border-light);
            padding: 12px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 17px;
            color: var(--text);
            white-space: nowrap;
        }
        .nav-brand:hover {
            color: var(--primary);
        }
        .nav-brand-icon {
            width: 34px;
            height: 34px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            border-radius: 10px;
            color: #fff;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            overflow-x: auto;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
        }
        .nav-links::-webkit-scrollbar {
            display: none;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            background: transparent;
            border: 1px solid transparent;
            transition: var(--transition);
            min-height: 44px;
        }
        .nav-link:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .nav-link.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
            border-color: rgba(42, 109, 244, 0.15);
            position: relative;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-link .nav-icon {
            font-size: 14px;
            line-height: 1;
        }
        .nav-cta {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: var(--transition);
            min-height: 44px;
        }
        .nav-cta:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .nav-cta:active {
            background: var(--primary-active);
            transform: translateY(0);
        }
        .nav-cta:focus-visible {
            outline: 3px solid var(--primary-focus);
            outline-offset: 2px;
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            color: var(--text);
            border: 1px solid var(--border);
            background: var(--card);
        }
        .nav-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .nav-toggle:focus-visible {
            outline: 3px solid var(--primary-focus);
            outline-offset: 2px;
        }

        /* ===== Page Header ===== */
        .page-header {
            background: var(--card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            padding: 28px 32px;
            margin-bottom: 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
        }
        .page-header h1 {
            font-size: 28px;
            font-weight: 700;
            margin: 0;
            color: var(--text);
            line-height: 1.3;
        }
        .search-inline {
            display: flex;
            align-items: center;
            gap: 10px;
            background: var(--bg);
            border-radius: var(--radius-sm);
            padding: 6px 6px 6px 16px;
            border: 1px solid var(--border);
            flex-shrink: 0;
        }
        .search-inline input {
            border: none;
            background: transparent;
            padding: 8px 0;
            font-size: 14px;
            color: var(--text);
            outline: none;
            width: 180px;
        }
        .search-inline input::placeholder {
            color: var(--text-muted);
        }
        .search-btn {
            background: var(--primary);
            color: #fff;
            padding: 10px 18px;
            border-radius: 10px;
            font-size: 13px;
            font-weight: 600;
            transition: var(--transition);
            white-space: nowrap;
            min-height: 40px;
        }
        .search-btn:hover {
            background: var(--primary-hover);
            color: #fff;
        }
        .search-btn:active {
            background: var(--primary-active);
        }
        .search-btn:focus-visible {
            outline: 3px solid var(--primary-focus);
            outline-offset: 2px;
        }

        /* ===== Main Content Layout ===== */
        .content-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 28px;
            align-items: start;
        }
        .main-panel {
            background: var(--card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            padding: 28px;
            overflow: hidden;
        }
        .main-panel h2 {
            font-size: 22px;
            font-weight: 700;
            margin: 0 0 16px;
            color: var(--text);
            line-height: 1.35;
        }

        /* ===== Help Topic Cards ===== */
        .help-topics-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-bottom: 28px;
        }
        .help-topic-card {
            background: var(--bg);
            border-radius: var(--radius-md);
            padding: 22px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }
        .help-topic-card:hover {
            background: var(--primary-light);
            border-color: rgba(42, 109, 244, 0.2);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .help-topic-card .topic-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--card);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 14px;
            box-shadow: var(--shadow-sm);
        }
        .help-topic-card h3 {
            font-size: 16px;
            font-weight: 600;
            margin: 0 0 8px;
            color: var(--text);
            line-height: 1.4;
        }
        .help-topic-card p {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.65;
        }
        .topic-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 12px;
        }
        .topic-tag {
            display: inline-flex;
            align-items: center;
            padding: 3px 10px;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: 20px;
            font-size: 11px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
        }
        .topic-tag:hover {
            background: var(--secondary);
            color: var(--primary);
            border-color: var(--primary);
        }

        /* ===== Steps / Process ===== */
        .process-steps {
            display: flex;
            flex-direction: column;
            gap: 0;
            margin: 24px 0 28px;
        }
        .process-step {
            display: flex;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-light);
            align-items: flex-start;
        }
        .process-step:last-child {
            border-bottom: none;
        }
        .step-num {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 700;
        }
        .step-content h4 {
            font-size: 15px;
            font-weight: 600;
            margin: 0 0 4px;
            color: var(--text);
        }
        .step-content p {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.65;
        }

        /* ===== Sidebar ===== */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .sidebar-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            padding: 22px;
        }
        .sidebar-card h3 {
            font-size: 15px;
            font-weight: 700;
            margin: 0 0 14px;
            color: var(--text);
        }
        .sidebar-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .sidebar-list li a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: 10px;
            transition: var(--transition);
            line-height: 1.5;
            min-height: 40px;
        }
        .sidebar-list li a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .sidebar-list li a .list-icon {
            display: inline-flex;
            width: 20px;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: var(--primary);
            font-size: 13px;
        }
        .hot-rank-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 13px;
            color: var(--text-secondary);
        }
        .hot-rank-item:last-child {
            border-bottom: none;
        }
        .hot-rank-num {
            width: 22px;
            height: 22px;
            flex-shrink: 0;
            border-radius: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 700;
            font-size: 11px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hot-rank-num.top {
            background: var(--primary);
            color: #fff;
        }
        .quick-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .quick-action-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
            min-height: 38px;
        }
        .quick-action-btn:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: rgba(42, 109, 244, 0.2);
        }

        /* ===== Scenario Section ===== */
        .scenario-section {
            background: var(--card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            padding: 28px 32px;
            margin-top: 28px;
        }
        .scenario-section h2 {
            font-size: 20px;
            font-weight: 700;
            margin: 0 0 16px;
            color: var(--text);
        }
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .scenario-item {
            display: flex;
            gap: 12px;
            padding: 16px;
            background: var(--bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            align-items: flex-start;
            transition: var(--transition);
        }
        .scenario-item:hover {
            background: var(--primary-light);
            border-color: rgba(42, 109, 244, 0.18);
        }
        .scenario-icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            border-radius: 10px;
            background: var(--card);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .scenario-item h4 {
            font-size: 14px;
            font-weight: 600;
            margin: 0 0 4px;
            color: var(--text);
        }
        .scenario-item p {
            font-size: 12px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            background: var(--card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            padding: 28px 32px;
            margin-top: 28px;
        }
        .faq-section h2 {
            font-size: 20px;
            font-weight: 700;
            margin: 0 0 16px;
            color: var(--text);
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            background: var(--primary-light);
            border-color: rgba(42, 109, 244, 0.18);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            transition: var(--transition);
            min-height: 44px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-toggle-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: var(--card);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .faq-answer {
            padding: 0 20px 16px;
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-toggle-icon {
            transform: rotate(45deg);
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: #0f1b2d;
            border-radius: var(--radius-xl);
            padding: 40px 36px;
            margin-top: 28px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--primary);
            opacity: 0.7;
        }
        .cta-section h2 {
            font-size: 24px;
            font-weight: 700;
            margin: 0 0 12px;
            color: #fff;
            line-height: 1.4;
        }
        .cta-section p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin: 0 auto 22px;
            max-width: 480px;
            line-height: 1.7;
        }
        .cta-buttons {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn-primary-white {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 12px 28px;
            background: #fff;
            color: var(--text);
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
            min-height: 46px;
        }
        .btn-primary-white:hover {
            background: var(--secondary);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 255, 255, 0.15);
        }
        .btn-outline-white {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 12px 28px;
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.4);
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
            min-height: 46px;
        }
        .btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.7);
        }
        .cta-buttons a:focus-visible,
        .btn-primary-white:focus-visible,
        .btn-outline-white:focus-visible {
            outline: 3px solid var(--primary-focus);
            outline-offset: 2px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            margin-top: 36px;
            padding: 32px 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 28px;
            margin-bottom: 24px;
        }
        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 12px 0 0;
            line-height: 1.7;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            margin: 0 0 12px;
            color: var(--text);
        }
        .footer-col a,
        .footer-col span {
            display: block;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 8px;
            transition: var(--transition);
            line-height: 1.5;
        }
        .footer-col a:hover {
            color: var(--primary);
        }
        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            padding-top: 18px;
            border-top: 1px solid var(--border-light);
            font-size: 12px;
            color: var(--text-muted);
        }
        .footer-links {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 12px;
            color: var(--text-muted);
        }
        .footer-links a {
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .content-layout {
                grid-template-columns: 1fr;
            }
            .sidebar {
                flex-direction: row;
                flex-wrap: wrap;
            }
            .sidebar-card {
                flex: 1 1 calc(50% - 12px);
                min-width: 260px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .site-header {
                padding: 0 8px;
                top: 8px;
                margin-bottom: 16px;
            }
            .nav-panel {
                padding: 10px 12px;
                gap: 8px;
                flex-wrap: wrap;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                gap: 4px;
                padding-top: 8px;
                order: 10;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-cta {
                display: none;
            }
            .nav-cta.mobile-visible {
                display: inline-flex;
                width: 100%;
                justify-content: center;
            }
            .nav-brand {
                font-size: 15px;
            }
            .nav-brand-icon {
                width: 28px;
                height: 28px;
                border-radius: 8px;
            }
            .page-header {
                flex-direction: column;
                align-items: flex-start;
                padding: 20px;
            }
            .search-inline {
                width: 100%;
            }
            .search-inline input {
                flex: 1;
                width: auto;
            }
            .help-topics-grid {
                grid-template-columns: 1fr;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                flex-direction: column;
            }
            .sidebar-card {
                flex: 1 1 100%;
                min-width: auto;
            }
            .cta-section {
                padding: 28px 20px;
            }
            .cta-section h2 {
                font-size: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .main-panel,
            .scenario-section,
            .faq-section {
                padding: 20px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 12px;
                padding-right: 12px;
            }
            .page-header h1 {
                font-size: 22px;
            }
            .help-topic-card {
                padding: 16px;
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 12px;
            }
            .cta-buttons {
                flex-direction: column;
                width: 100%;
            }
            .cta-buttons a {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category5 */
:root {
      --primary: #1f6feb;
      --primary-hover: #174ea6;
      --primary-active: #123f85;
      --primary-light: rgba(42, 109, 244, 0.08);
      --primary-focus: rgba(42, 109, 244, 0.35);
      --secondary: #e8eef7;
      --bg: #f5f7fb;
      --card: #ffffff;
      --text: #0f1b2d;
      --text-secondary: #5a6b85;
      --text-muted: #9aa8bf;
      --border: #dce5f2;
      --border-light: #e5eaf3;
      --success: #16a34a;
      --warning: #f59e0b;
      --danger: #dc2626;
      --radius-sm: 12px;
      --radius-md: 16px;
      --radius-lg: 20px;
      --radius-xl: 22px;
      --shadow-sm: 0 2px 8px rgba(31, 60, 110, 0.06);
      --shadow-md: 0 6px 24px rgba(31, 60, 110, 0.08);
      --shadow-lg: 0 12px 36px rgba(31, 60, 110, 0.12);
      --font-family: 'Inter', 'Roboto', 'Hiragino Sans GB', 'HarmonyOS Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --container-max: 1200px;
      --section-gap: 64px;
      --section-gap-mobile: 44px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }
    body {
      font-family: var(--font-family);
      font-size: 15px;
      line-height: 1.75;
      color: var(--text);
      background-color: var(--bg);
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      min-height: 100vh;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    a:hover {
      color: var(--primary);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button,
    input,
    select,
    textarea {
      font-family: inherit;
      font-size: inherit;
      line-height: inherit;
    }
    button {
      cursor: pointer;
      border: none;
      background: none;
    }
    button:focus-visible,
    a:focus-visible,
    input:focus-visible,
    select:focus-visible {
      outline: 3px solid var(--primary-focus);
      outline-offset: 2px;
    }
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    /* Header */
    .site-header {
      position: sticky;
      top: 16px;
      z-index: 100;
      padding: 0 20px;
      margin-bottom: 24px;
    }
    .nav-panel {
      max-width: var(--container-max);
      margin: 0 auto;
      background-color: var(--card);
      border-radius: var(--radius-lg);
      box-shadow: 0 4px 18px rgba(31, 60, 110, 0.06);
      border: 1px solid var(--border-light);
      padding: 12px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
      font-weight: 700;
      font-size: 17px;
      color: var(--text);
      white-space: nowrap;
      min-height: 44px;
    }
    .nav-brand:hover {
      color: var(--primary);
    }
    .nav-brand-icon {
      width: 34px;
      height: 34px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--primary);
      border-radius: 10px;
      color: #fff;
      flex-shrink: 0;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 6px;
      flex-wrap: wrap;
      overflow-x: auto;
      scrollbar-width: none;
      -webkit-overflow-scrolling: touch;
    }
    .nav-links::-webkit-scrollbar {
      display: none;
    }
    .nav-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      font-weight: 500;
      color: var(--text-secondary);
      white-space: nowrap;
      background: transparent;
      border: 1px solid transparent;
      transition: var(--transition);
      min-height: 44px;
    }
    .nav-link:hover {
      background: var(--primary-light);
      color: var(--primary);
    }
    .nav-link.active {
      background: var(--primary-light);
      color: var(--primary);
      font-weight: 600;
      border-color: rgba(42, 109, 244, 0.15);
      position: relative;
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -1px;
      left: 14px;
      right: 14px;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }
    .nav-link .nav-icon {
      font-size: 14px;
      line-height: 1;
    }
    .nav-cta {
      flex-shrink: 0;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      background: var(--primary);
      color: #fff;
      font-size: 14px;
      font-weight: 600;
      white-space: nowrap;
      transition: var(--transition);
      min-height: 44px;
    }
    .nav-cta:hover {
      background: var(--primary-hover);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }
    .nav-cta:active {
      background: var(--primary-active);
      transform: translateY(0);
    }
    .nav-toggle {
      display: none;
      width: 44px;
      height: 44px;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      color: var(--text);
      flex-shrink: 0;
      transition: var(--transition);
    }
    .nav-toggle:hover {
      background: var(--primary-light);
      color: var(--primary);
    }
    /* Breadcrumb */
    .breadcrumb-bar {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      font-size: 13px;
      color: var(--text-secondary);
      margin-bottom: 16px;
      min-height: 44px;
    }
    .breadcrumb-bar a {
      color: var(--text-secondary);
    }
    .breadcrumb-bar a:hover {
      color: var(--primary);
    }
    .breadcrumb-sep {
      color: var(--text-muted);
      font-size: 12px;
    }
    .breadcrumb-current {
      color: var(--primary);
      font-weight: 600;
    }
    /* Page Header Card */
    .page-head-card {
      background: var(--card);
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      padding: 20px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 28px;
    }
    .page-head-left {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .page-head-icon {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      flex-shrink: 0;
    }
    .page-head-text h2 {
      font-size: 20px;
      font-weight: 700;
      color: var(--text);
      line-height: 1.4;
    }
    .page-head-text p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.5;
    }
    .page-head-search {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .page-head-search input {
      padding: 10px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      background: var(--bg);
      color: var(--text);
      font-size: 13px;
      min-width: 200px;
      transition: var(--transition);
      min-height: 44px;
    }
    .page-head-search input::placeholder {
      color: var(--text-muted);
    }
    .page-head-search input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(42, 109, 244, 0.18);
      outline: none;
    }
    .page-head-search button {
      min-height: 44px;
      padding: 10px 18px;
      border-radius: var(--radius-sm);
      background: var(--primary);
      color: #fff;
      font-size: 13px;
      font-weight: 600;
      transition: var(--transition);
      white-space: nowrap;
    }
    .page-head-search button:hover {
      background: var(--primary-hover);
    }
    /* Hero */
    .category-hero {
      position: relative;
      border-radius: var(--radius-xl);
      overflow: hidden;
      background: var(--card);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-md);
      margin-bottom: var(--section-gap);
      min-height: 360px;
      display: flex;
      align-items: center;
    }
    .category-hero-bg {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-position: center;
      z-index: 0;
    }
    .category-hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(100deg, rgba(15, 27, 45, 0.88) 25%, rgba(15, 27, 45, 0.55) 70%, rgba(15, 27, 45, 0.3) 100%);
      z-index: 1;
    }
    .category-hero-content {
      position: relative;
      z-index: 2;
      padding: 56px 48px;
      max-width: 720px;
    }
    .category-hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(255, 255, 255, 0.15);
      border: 1px solid rgba(255, 255, 255, 0.25);
      color: #fff;
      font-size: 12px;
      font-weight: 500;
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 20px;
      backdrop-filter: blur(4px);
    }
    .category-hero-content h1 {
      font-size: 40px;
      font-weight: 700;
      color: #ffffff;
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.02em;
    }
    .category-hero-content p {
      font-size: 16px;
      color: rgba(255, 255, 255, 0.85);
      line-height: 1.8;
      margin-bottom: 24px;
      max-width: 560px;
    }
    .hero-actions {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      align-items: center;
    }
    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 13px 28px;
      border-radius: var(--radius-sm);
      background: var(--primary);
      color: #fff;
      font-size: 15px;
      font-weight: 600;
      transition: var(--transition);
      min-height: 48px;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }
    .btn-primary:active {
      background: var(--primary-active);
      transform: translateY(0);
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 13px 28px;
      border-radius: var(--radius-sm);
      background: transparent;
      color: var(--primary);
      font-size: 15px;
      font-weight: 600;
      transition: var(--transition);
      min-height: 48px;
      border: 1.5px solid var(--primary);
      cursor: pointer;
    }
    .btn-secondary:hover {
      background: var(--primary-light);
      color: var(--primary);
      transform: translateY(-2px);
    }
    .btn-secondary:active {
      transform: translateY(0);
    }
    .btn-secondary.on-dark {
      color: #fff;
      border-color: rgba(255, 255, 255, 0.5);
    }
    .btn-secondary.on-dark:hover {
      background: rgba(255, 255, 255, 0.12);
      color: #fff;
    }
    /* Section Common */
    .section {
      margin-bottom: var(--section-gap);
    }
    .section-header {
      margin-bottom: 28px;
    }
    .section-header h2 {
      font-size: 28px;
      font-weight: 700;
      color: var(--text);
      line-height: 1.4;
      margin-bottom: 8px;
      letter-spacing: -0.01em;
    }
    .section-header p {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.7;
      max-width: 640px;
    }
    /* Service Capabilities */
    .capability-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      align-items: start;
    }
    .capability-main-card {
      background: var(--card);
      border-radius: var(--radius-xl);
      padding: 36px 32px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
    }
    .capability-main-card h3 {
      font-size: 22px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 12px;
    }
    .capability-main-card p {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.8;
      margin-bottom: 20px;
    }
    .capability-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .capability-tag {
      display: inline-flex;
      align-items: center;
      padding: 6px 14px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 500;
      background: var(--primary-light);
      color: var(--primary);
      border: 1px solid rgba(42, 109, 244, 0.15);
    }
    .capability-steps {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .step-card {
      background: var(--card);
      border-radius: var(--radius-md);
      padding: 20px 22px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      display: flex;
      align-items: flex-start;
      gap: 16px;
      transition: var(--transition);
      cursor: default;
    }
    .step-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
      border-color: rgba(42, 109, 244, 0.2);
    }
    .step-number {
      width: 40px;
      height: 40px;
      border-radius: var(--radius-sm);
      background: var(--secondary);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 700;
      flex-shrink: 0;
    }
    .step-info h4 {
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 6px;
    }
    .step-info p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    /* Service Content List */
    .service-list-panel {
      background: var(--card);
      border-radius: var(--radius-xl);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      padding: 24px;
    }
    .list-filter-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      flex-wrap: wrap;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border-light);
      margin-bottom: 20px;
    }
    .filter-tabs {
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
    }
    .filter-tab {
      padding: 8px 16px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      font-weight: 500;
      color: var(--text-secondary);
      background: transparent;
      border: 1px solid transparent;
      transition: var(--transition);
      min-height: 40px;
      cursor: pointer;
    }
    .filter-tab:hover {
      background: var(--primary-light);
      color: var(--primary);
    }
    .filter-tab.active {
      background: var(--primary);
      color: #fff;
      font-weight: 600;
    }
    .sort-select {
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      background: var(--bg);
      color: var(--text);
      font-size: 13px;
      min-height: 40px;
      cursor: pointer;
    }
    .service-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .service-item {
      display: flex;
      gap: 20px;
      background: var(--bg);
      border-radius: var(--radius-md);
      padding: 20px;
      border: 1px solid var(--border-light);
      transition: var(--transition);
    }
    .service-item:hover {
      border-color: rgba(42, 109, 244, 0.25);
      box-shadow: var(--shadow-sm);
    }
    .service-item-cover {
      width: 180px;
      height: 130px;
      border-radius: var(--radius-sm);
      overflow: hidden;
      flex-shrink: 0;
      background: var(--secondary);
    }
    .service-item-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .service-item-body {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 8px;
      min-width: 0;
    }
    .service-item-body h3 {
      font-size: 17px;
      font-weight: 600;
      color: var(--text);
      line-height: 1.4;
    }
    .service-item-body p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .service-item-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
      font-size: 12px;
      color: var(--text-muted);
    }
    .service-item-meta .badge {
      display: inline-flex;
      align-items: center;
      padding: 3px 10px;
      border-radius: 999px;
      font-size: 11px;
      font-weight: 500;
      background: var(--primary-light);
      color: var(--primary);
    }
    .service-item-meta .badge-green {
      background: rgba(22, 163, 74, 0.12);
      color: var(--success);
    }
    .service-progress {
      width: 100%;
      height: 4px;
      border-radius: 2px;
      background: var(--border-light);
      overflow: hidden;
      margin-top: auto;
    }
    .service-progress-bar {
      height: 100%;
      border-radius: 2px;
      background: var(--primary);
      transition: var(--transition);
    }
    /* Scenarios */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }
    .scenario-card {
      background: var(--card);
      border-radius: var(--radius-md);
      padding: 22px 20px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      text-align: center;
    }
    .scenario-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
      border-color: rgba(42, 109, 244, 0.2);
    }
    .scenario-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin: 0 auto 14px;
    }
    .scenario-card h4 {
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 6px;
    }
    .scenario-card p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.6;
    }
    /* Process Flow */
    .process-flow {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      position: relative;
    }
    .process-step {
      background: var(--card);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      text-align: center;
      position: relative;
      transition: var(--transition);
    }
    .process-step:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }
    .process-num {
      font-size: 32px;
      font-weight: 700;
      color: var(--primary);
      opacity: 0.25;
      line-height: 1;
      margin-bottom: 8px;
    }
    .process-step h4 {
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 8px;
    }
    .process-step p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.6;
    }
    /* Stats Panel */
    .stats-panel {
      background: var(--card);
      border-radius: var(--radius-xl);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      padding: 36px 32px;
      position: relative;
      overflow: hidden;
    }
    .stats-panel::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: var(--primary);
      border-radius: 2px 2px 0 0;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .stat-item {
      text-align: center;
      padding: 12px 8px;
      border-right: 1px solid var(--border-light);
    }
    .stat-item:last-child {
      border-right: none;
    }
    .stat-number {
      font-size: 36px;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.2;
      letter-spacing: -0.02em;
    }
    .stat-label {
      font-size: 13px;
      color: var(--text-secondary);
      margin-top: 6px;
    }
    /* FAQ */
    .faq-list {
      background: var(--card);
      border-radius: var(--radius-xl);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      padding: 24px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .faq-item {
      background: var(--bg);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item:hover {
      background: rgba(42, 109, 244, 0.04);
      border-color: rgba(42, 109, 244, 0.18);
    }
    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 18px 20px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      text-align: left;
      min-height: 52px;
      cursor: pointer;
      transition: var(--transition);
    }
    .faq-question:hover {
      color: var(--primary);
    }
    .faq-toggle {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--secondary);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      font-weight: 700;
      flex-shrink: 0;
      transition: var(--transition);
    }
    .faq-item.open .faq-toggle {
      background: var(--primary);
      color: #fff;
      transform: rotate(45deg);
    }
    .faq-answer {
      padding: 0 20px 18px 20px;
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.8;
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
    }
    /* CTA */
    .cta-panel {
      background: #0f1b2d;
      border-radius: var(--radius-xl);
      padding: 48px 40px;
      text-align: center;
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }
    .cta-panel::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 100%;
      background-image: radial-gradient(ellipse at 20% 80%, rgba(42, 109, 244, 0.25) 0%, transparent 55%),
                        radial-gradient(ellipse at 80% 20%, rgba(42, 109, 244, 0.2) 0%, transparent 50%);
      z-index: 0;
    }
    .cta-panel-content {
      position: relative;
      z-index: 1;
    }
    .cta-wave {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 4px;
      margin-bottom: 16px;
    }
    .cta-wave span {
      width: 3px;
      height: 20px;
      border-radius: 2px;
      background: rgba(255, 255, 255, 0.4);
      display: inline-block;
    }
    .cta-wave span:nth-child(odd) {
      height: 28px;
    }
    .cta-panel h2 {
      font-size: 30px;
      font-weight: 700;
      color: #fff;
      line-height: 1.4;
      margin-bottom: 12px;
    }
    .cta-panel p {
      font-size: 15px;
      color: rgba(255, 255, 255, 0.75);
      line-height: 1.7;
      margin-bottom: 28px;
      max-width: 560px;
      margin-left: auto;
      margin-right: auto;
    }
    .cta-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      flex-wrap: wrap;
    }
    .btn-white {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 13px 28px;
      border-radius: var(--radius-sm);
      background: #ffffff;
      color: var(--primary);
      font-size: 15px;
      font-weight: 700;
      transition: var(--transition);
      min-height: 48px;
      border: none;
      cursor: pointer;
    }
    .btn-white:hover {
      background: #f0f4ff;
      color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    }
    /* Footer */
    .site-footer {
      background: var(--card);
      border-radius: var(--radius-xl);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      padding: 40px 32px 24px;
      margin-top: 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 28px;
    }
    .footer-brand .nav-brand {
      margin-bottom: 12px;
    }
    .footer-brand p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    .footer-col h4 {
      font-size: 14px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 12px;
    }
    .footer-col a,
    .footer-col span {
      display: block;
      font-size: 13px;
      color: var(--text-secondary);
      margin-bottom: 8px;
      transition: var(--transition);
      line-height: 1.6;
    }
    .footer-col a:hover {
      color: var(--primary);
    }
    .footer-contact-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--text-secondary);
      margin-bottom: 8px;
      line-height: 1.6;
    }
    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      flex-wrap: wrap;
      padding-top: 20px;
      border-top: 1px solid var(--border-light);
      font-size: 12px;
      color: var(--text-muted);
    }
    .footer-links {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
      font-size: 12px;
      color: var(--text-muted);
    }
    .footer-links a {
      color: var(--text-muted);
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    /* Responsive */
    @media (max-width: 1024px) {
      .nav-panel {
        flex-wrap: wrap;
      }
      .nav-links {
        order: 3;
        width: 100%;
        justify-content: flex-start;
        padding-top: 8px;
        border-top: 1px solid var(--border-light);
      }
      .capability-grid {
        grid-template-columns: 1fr;
      }
      .scenario-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-flow {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .stats-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
      }
      .stat-number {
        font-size: 28px;
      }
    }
    @media (max-width: 768px) {
      :root {
        --section-gap: 44px;
      }
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
      .site-header {
        padding: 0 12px;
        top: 12px;
      }
      .nav-panel {
        padding: 10px 14px;
        border-radius: var(--radius-md);
      }
      .nav-brand {
        font-size: 15px;
      }
      .nav-brand-icon {
        width: 30px;
        height: 30px;
      }
      .nav-cta {
        display: none;
      }
      .nav-toggle {
        display: flex;
      }
      .nav-links {
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding-top: 12px;
      }
      .nav-links.open {
        display: flex;
      }
      .nav-link {
        width: 100%;
        justify-content: flex-start;
        padding: 12px 14px;
        border-radius: var(--radius-sm);
      }
      .nav-link.active::after {
        display: none;
      }
      .nav-link.active {
        border-left: 3px solid var(--primary);
      }
      .category-hero {
        min-height: 300px;
      }
      .category-hero-content {
        padding: 36px 24px;
      }
      .category-hero-content h1 {
        font-size: 30px;
      }
      .category-hero-content p {
        font-size: 14px;
      }
      .page-head-card {
        flex-direction: column;
        align-items: flex-start;
      }
      .page-head-search {
        width: 100%;
      }
      .page-head-search input {
        flex: 1;
        min-width: 0;
      }
      .service-item {
        flex-direction: column;
      }
      .service-item-cover {
        width: 100%;
        height: 180px;
      }
      .scenario-grid {
        grid-template-columns: 1fr;
      }
      .process-flow {
        grid-template-columns: 1fr;
        gap: 10px;
      }
      .stats-grid {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .stat-item {
        border-right: none;
        border-bottom: 1px solid var(--border-light);
        padding-bottom: 16px;
      }
      .stat-item:last-child {
        border-bottom: none;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
      .cta-panel {
        padding: 36px 24px;
      }
      .cta-panel h2 {
        font-size: 24px;
      }
      .section-header h2 {
        font-size: 24px;
      }
      .capability-main-card {
        padding: 24px 20px;
      }
      .list-filter-bar {
        flex-direction: column;
        align-items: flex-start;
      }
      .filter-tabs {
        width: 100%;
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
      }
      .filter-tabs::-webkit-scrollbar {
        display: none;
      }
      .filter-tab {
        flex-shrink: 0;
      }
      .btn-primary,
      .btn-secondary,
      .btn-white {
        width: 100%;
        justify-content: center;
      }
      .hero-actions {
        flex-direction: column;
        width: 100%;
      }
    }
    @media (max-width: 520px) {
      .category-hero-content h1 {
        font-size: 26px;
      }
      .category-hero {
        min-height: 260px;
      }
      .category-hero-content {
        padding: 28px 18px;
      }
      .stats-panel {
        padding: 24px 18px;
      }
      .section-header h2 {
        font-size: 22px;
      }
      .page-head-text h2 {
        font-size: 18px;
      }
    }