/* roulang page: index */
:root {
            --primary: #7c5cff;
            --primary-light: #9b85ff;
            --primary-dark: #5a3ee0;
            --secondary: #00d4c8;
            --bg-deep: #0a0c1a;
            --bg-body: #0e1024;
            --bg-card: #161936;
            --bg-card-light: #1c2040;
            --bg-alt: #12152e;
            --text-main: #e8e9f4;
            --text-muted: #9aa3c7;
            --border-color: rgba(255, 255, 255, 0.08);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 16px 48px rgba(124, 92, 255, 0.18);
            --transition: all .3s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            font-size: 16px;
            line-height: 1.65;
            color: var(--text-main);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        .container-custom {
            width: 100%;
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 32px;
        }
        @media (max-width: 767.98px) {
            .container-custom {
                padding: 0 20px;
            }
        }
        .section {
            position: relative;
            padding: 90px 0;
        }
        .section.bg-alt {
            background: var(--bg-alt);
        }
        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 56px;
        }
        .section-tag {
            display: inline-block;
            background: rgba(124, 92, 255, 0.14);
            color: var(--primary-light);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            padding: 6px 18px;
            border-radius: 50px;
            border: 1px solid rgba(124, 92, 255, 0.25);
            margin-bottom: 18px;
            text-transform: uppercase;
        }
        .section-head h2 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            margin: 0 0 14px;
            color: #fff;
        }
        .section-head p {
            font-size: 16px;
            color: var(--text-muted);
            margin: 0;
        }
        @media (max-width: 767.98px) {
            .section {
                padding: 60px 0;
            }
            .section-head {
                margin-bottom: 40px;
            }
            .section-head h2 {
                font-size: 28px;
            }
        }

        /* ===== 左侧导航 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 280px;
            z-index: 1050;
            background: linear-gradient(180deg, #111432 0%, #0b0d22 100%);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            padding: 32px 22px 24px;
            overflow-y: auto;
            transition: transform 0.35s ease;
        }
        .sidebar-brand {
            padding: 8px 6px 28px;
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 20px;
        }
        .sidebar-brand a {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .brand-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            box-shadow: 0 4px 18px rgba(124, 92, 255, 0.35);
            flex-shrink: 0;
        }
        .brand-text {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            letter-spacing: 0.5px;
        }
        .nav-section-title {
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--text-muted);
            padding: 0 12px;
            margin-bottom: 10px;
            font-weight: 600;
        }
        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav .nav-link {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 13px 14px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .sidebar-nav .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
        }
        .sidebar-nav .nav-link:hover {
            background: rgba(124, 92, 255, 0.1);
            color: var(--primary-light);
            transform: translateX(4px);
        }
        .sidebar-nav .nav-link.active {
            background: linear-gradient(135deg, rgba(124, 92, 255, 0.2), rgba(0, 212, 200, 0.1));
            color: #fff;
            border: 1px solid rgba(124, 92, 255, 0.25);
            box-shadow: 0 4px 20px rgba(124, 92, 255, 0.12);
        }
        .sidebar-footer {
            margin-top: auto;
            padding-top: 20px;
        }
        .sidebar-tip-card {
            background: rgba(124, 92, 255, 0.08);
            border: 1px solid rgba(124, 92, 255, 0.2);
            border-radius: var(--radius-md);
            padding: 18px 16px;
            text-align: center;
        }
        .sidebar-tip-card i {
            font-size: 24px;
            color: var(--secondary);
            margin-bottom: 8px;
        }
        .sidebar-tip-card div {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
        }
        .sidebar-tip-card p {
            font-size: 12px;
            color: var(--text-muted);
            margin: 4px 0 0;
        }

        /* 移动端顶栏 */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 1040;
            background: rgba(14, 16, 36, 0.92);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
        }
        .mobile-header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 20px;
        }
        .mobile-toggle-btn {
            background: none;
            border: 1px solid var(--border-color);
            border-radius: 10px;
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            cursor: pointer;
            transition: var(--transition);
        }
        .mobile-toggle-btn:hover {
            background: rgba(124, 92, 255, 0.15);
            border-color: var(--primary);
        }
        .mobile-brand {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.3px;
        }
        .mobile-header-right a {
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            border: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 16px;
        }
        .mobile-header-right a:hover {
            color: var(--secondary);
            border-color: var(--secondary);
        }

        /* 遮罩 */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 1040;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(3px);
        }
        .sidebar-overlay.show {
            display: block;
        }
        @media (max-width: 991.98px) {
            .sidebar {
                transform: translateX(-100%);
                box-shadow: 4px 0 30px rgba(0, 0, 0, 0.3);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-header {
                display: block;
            }
            .main-wrapper {
                margin-left: 0 !important;
            }
        }
        @media (min-width: 992px) {
            .sidebar {
                transform: none !important;
            }
            .sidebar-overlay {
                display: none !important;
            }
        }

        /* ===== 主内容 ===== */
        .main-wrapper {
            margin-left: 280px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .main-content {
            flex: 1;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 560px;
            display: flex;
            align-items: center;
            padding: 100px 0 90px;
            background: linear-gradient(135deg, rgba(10, 12, 26, 0.95) 0%, rgba(16, 19, 46, 0.82) 50%, rgba(10, 12, 26, 0.9) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(0, 212, 200, 0.15);
            border: 1px solid rgba(0, 212, 200, 0.3);
            color: var(--secondary);
            font-size: 14px;
            font-weight: 600;
            padding: 7px 20px;
            border-radius: 50px;
            margin-bottom: 24px;
        }
        .hero-section h1 {
            font-size: 56px;
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            margin: 0 0 16px;
            letter-spacing: 1px;
        }
        .hero-desc {
            font-size: 22px;
            font-weight: 500;
            color: var(--primary-light);
            margin-bottom: 14px;
        }
        .hero-sub {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 36px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 48px;
        }
        .btn-primary-custom {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border: none;
            color: #fff;
            padding: 14px 34px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 6px 24px rgba(124, 92, 255, 0.35);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 32px rgba(124, 92, 255, 0.45);
            color: #fff;
        }
        .btn-outline-custom {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.35);
            color: #fff;
            padding: 12px 32px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-outline-custom:hover {
            border-color: var(--secondary);
            color: var(--secondary);
            transform: translateY(-3px);
            background: rgba(0, 212, 200, 0.08);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }
        .hero-stat-item .num {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            line-height: 1.1;
        }
        .hero-stat-item .label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 4px;
        }
        @media (max-width: 767.98px) {
            .hero-section {
                padding: 70px 0 60px;
                min-height: auto;
            }
            .hero-section h1 {
                font-size: 34px;
            }
            .hero-desc {
                font-size: 18px;
            }
            .hero-sub {
                font-size: 14px;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat-item .num {
                font-size: 24px;
            }
        }

        /* ===== 核心优势 ===== */
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            height: 100%;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(124, 92, 255, 0.3);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 18px;
            background: linear-gradient(135deg, rgba(124, 92, 255, 0.2), rgba(0, 212, 200, 0.15));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--primary-light);
            margin-bottom: 24px;
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
        }
        @media (max-width: 767.98px) {
            .feature-card {
                padding: 28px 22px;
            }
        }

        /* ===== 分类入口 ===== */
        .category-card {
            display: block;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
            transition: var(--transition);
            position: relative;
        }
        .category-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(124, 92, 255, 0.4);
        }
        .category-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
        }
        .category-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s ease;
        }
        .category-card:hover .category-img img {
            transform: scale(1.06);
        }
        .category-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(22, 25, 54, 0.7), transparent);
        }
        .category-body {
            padding: 24px;
            position: relative;
        }
        .category-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .category-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .category-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-light);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .category-link i {
            transition: transform 0.3s ease;
        }
        .category-card:hover .category-link {
            color: var(--secondary);
        }
        .category-card:hover .category-link i {
            transform: translateX(4px);
        }
        @media (max-width: 767.98px) {
            .category-body {
                padding: 18px;
            }
        }

        /* ===== 最新资讯列表 ===== */
        .news-wrap {
            max-width: 900px;
            margin: 0 auto;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 20px 28px;
        }
        .news-item-row {
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .news-item-row:last-child {
            border-bottom: none;
        }
        .news-link {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 20px 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .news-link:hover {
            background: rgba(124, 92, 255, 0.05);
        }
        .news-index {
            font-size: 18px;
            font-weight: 800;
            color: var(--primary);
            min-width: 36px;
            letter-spacing: 1px;
        }
        .news-content {
            flex: 1;
            min-width: 0;
        }
        .news-title {
            display: block;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin-bottom: 4px;
            transition: var(--transition);
        }
        .news-link:hover .news-title {
            color: var(--primary-light);
        }
        .news-desc {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .news-tags {
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            gap: 6px;
            flex-shrink: 0;
        }
        .news-tag {
            background: rgba(124, 92, 255, 0.12);
            border: 1px solid rgba(124, 92, 255, 0.2);
            color: var(--primary-light);
            font-size: 12px;
            padding: 3px 10px;
            border-radius: 4px;
            white-space: nowrap;
        }
        .news-date {
            font-size: 12px;
            color: var(--text-muted);
        }
        .empty-tip {
            text-align: center;
            padding: 48px 20px;
            color: var(--text-muted);
            font-size: 15px;
        }
        @media (max-width: 767.98px) {
            .news-wrap {
                padding: 12px 16px;
            }
            .news-link {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
                padding: 16px 6px;
            }
            .news-index {
                font-size: 15px;
            }
            .news-tags {
                flex-direction: row;
                align-items: center;
            }
            .news-content {
                width: 100%;
            }
            .news-desc {
                -webkit-line-clamp: 3;
            }
        }

        /* ===== 热门排行 ===== */
        .trending-feature {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
            transition: var(--transition);
        }
        .trending-feature:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .trending-feature .trend-img {
            position: relative;
            aspect-ratio: 16/10;
            overflow: hidden;
        }
        .trending-feature .trend-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .trending-feature .trend-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(14, 16, 36, 0.8), transparent 60%);
        }
        .trending-feature .trend-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 1;
            background: var(--primary);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 50px;
            box-shadow: 0 4px 12px rgba(124, 92, 255, 0.4);
        }
        .trending-feature .trend-body {
            padding: 24px;
        }
        .trending-feature .trend-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .trending-feature .trend-body p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
        }
        .trend-list {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 12px 20px;
            height: 100%;
        }
        .trend-list-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 8px;
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .trend-list-item:last-child {
            border-bottom: none;
        }
        .trend-list-item:hover {
            background: rgba(124, 92, 255, 0.04);
        }
        .trend-rank {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .trend-list-item:nth-child(1) .trend-rank {
            background: rgba(255, 193, 7, 0.2);
            color: #ffc107;
        }
        .trend-list-item:nth-child(2) .trend-rank {
            background: rgba(156, 163, 175, 0.15);
            color: #cbd5e0;
        }
        .trend-list-item:nth-child(3) .trend-rank {
            background: rgba(255, 140, 66, 0.18);
            color: #ff8c42;
        }
        .trend-list-item .trend-text {
            flex: 1;
            min-width: 0;
        }
        .trend-list-item .trend-text .title {
            display: block;
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .trend-list-item .trend-text .meta {
            font-size: 12px;
            color: var(--text-muted);
        }
        .trend-list-item .trend-hot {
            font-size: 12px;
            color: var(--secondary);
            font-weight: 600;
            flex-shrink: 0;
        }
        @media (max-width: 767.98px) {
            .trend-list {
                margin-top: 24px;
            }
        }

        /* ===== 数据统计 ===== */
        .stats-section {
            background: linear-gradient(135deg, rgba(124, 92, 255, 0.15), rgba(0, 212, 200, 0.1)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            padding: 90px 0;
            position: relative;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(10, 12, 26, 0.82);
        }
        .stats-section .container-custom {
            position: relative;
            z-index: 1;
        }
        .stat-block {
            text-align: center;
            padding: 24px;
        }
        .stat-block .num {
            font-size: 44px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .stat-block .num span {
            color: var(--secondary);
        }
        .stat-block .label {
            font-size: 15px;
            color: var(--text-muted);
            margin-top: 6px;
        }
        @media (max-width: 767.98px) {
            .stats-section {
                padding: 60px 0;
            }
            .stat-block .num {
                font-size: 32px;
            }
        }

        /* ===== 流程 ===== */
        .step-card {
            text-align: center;
            padding: 32px 24px;
            position: relative;
        }
        .step-num {
            width: 72px;
            height: 72px;
            margin: 0 auto 24px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid rgba(124, 92, 255, 0.4);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 800;
            color: var(--primary-light);
            position: relative;
            z-index: 1;
            box-shadow: 0 0 0 6px rgba(124, 92, 255, 0.08);
        }
        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }
        .step-arrow {
            position: absolute;
            top: 50%;
            right: -20px;
            transform: translateY(-50%);
            color: var(--primary);
            font-size: 20px;
            z-index: 2;
        }
        @media (max-width: 991.98px) {
            .step-arrow {
                display: none;
            }
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(124, 92, 255, 0.3);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary-light);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform 0.3s ease;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            border-top: 0 solid var(--border-color);
        }
        .faq-answer p {
            padding: 0 24px 22px;
            margin: 0;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            border-top-width: 1px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 100px 0;
            background: linear-gradient(135deg, rgba(10, 12, 26, 0.9), rgba(16, 19, 46, 0.8)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 16px;
            color: var(--text-muted);
            margin-bottom: 36px;
        }
        .cta-section .hero-actions {
            justify-content: center;
        }
        @media (max-width: 767.98px) {
            .cta-section {
                padding: 60px 0;
            }
            .cta-section h2 {
                font-size: 26px;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--border-color);
            padding: 70px 0 30px;
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }
        .footer-brand .brand-icon {
            width: 40px;
            height: 40px;
            font-size: 16px;
        }
        .footer-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 12px;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 32px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 2px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary-light);
            padding-left: 6px;
        }
        .footer-contact {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 2;
        }
        .footer-contact i {
            width: 20px;
            color: var(--primary-light);
            margin-right: 6px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 30px;
            margin-top: 50px;
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }
        @media (max-width: 767.98px) {
            .site-footer {
                padding: 50px 0 24px;
            }
            .footer-bottom {
                margin-top: 32px;
                padding-top: 20px;
            }
        }

/* roulang page: category1 */
:root {
        --primary: #6c5ce7;
        --primary-dark: #5a4bd1;
        --primary-light: #8b7cf7;
        --accent: #00d2ff;
        --accent-warm: #f7c948;
        --dark-bg: #0f172a;
        --dark-bg-2: #1e293b;
        --body-bg: #f4f6fb;
        --white: #ffffff;
        --text-main: #1e293b;
        --text-weak: #64748b;
        --text-light: #94a3b8;
        --border: #e2e8f0;
        --radius-lg: 20px;
        --radius-md: 14px;
        --radius-sm: 8px;
        --shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
        --shadow-md: 0 8px 30px rgba(15, 23, 42, .08);
        --shadow-lg: 0 16px 48px rgba(15, 23, 42, .12);
        --sidebar-width: 260px;
        --transition: .3s cubic-bezier(.4, 0, .2, 1);
    }

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

    body {
        margin: 0;
        font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        background: var(--body-bg);
        color: var(--text-main);
        line-height: 1.7;
        font-size: 15px;
        -webkit-font-smoothing: antialiased;
    }

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

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

    button,
    input {
        font-family: inherit;
    }

    .container-custom {
        width: 100%;
        max-width: 1320px;
        margin: 0 auto;
        padding: 0 24px;
    }

    .layout-wrapper {
        display: flex;
        min-height: 100vh;
    }

    .sidebar {
        width: var(--sidebar-width);
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        background: var(--dark-bg);
        display: flex;
        flex-direction: column;
        padding: 24px 0 20px;
        z-index: 1040;
        transition: transform var(--transition), box-shadow var(--transition);
    }

    .sidebar-brand {
        padding: 0 24px 22px;
        border-bottom: 1px solid rgba(255, 255, 255, .06);
        margin-bottom: 18px;
    }

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

    .brand-icon {
        width: 42px;
        height: 42px;
        min-width: 42px;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 17px;
        box-shadow: 0 4px 16px rgba(108, 92, 231, .35);
    }

    .brand-text {
        font-size: 16px;
        font-weight: 700;
        color: #fff;
        line-height: 1.35;
        letter-spacing: .01em;
    }

    .sidebar-nav {
        padding: 0 16px;
        flex: 1;
        overflow-y: auto;
    }

    .sidebar-nav::-webkit-scrollbar {
        width: 4px;
    }

    .sidebar-nav::-webkit-scrollbar-thumb {
        background: rgba(255, 255, 255, .12);
        border-radius: 4px;
    }

    .nav-section-title {
        font-size: 11px;
        color: var(--text-light);
        text-transform: uppercase;
        letter-spacing: .1em;
        margin: 0 8px 14px;
        font-weight: 600;
    }

    .nav-link {
        display: flex;
        align-items: center;
        gap: 14px;
        padding: 12px 16px;
        border-radius: 12px;
        color: var(--text-light);
        font-size: 14px;
        font-weight: 500;
        transition: all var(--transition);
        margin-bottom: 4px;
        border: 1px solid transparent;
    }

    .nav-link:hover {
        background: rgba(255, 255, 255, .06);
        color: #fff;
        transform: translateX(3px);
    }

    .nav-link.active {
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        color: #fff;
        box-shadow: 0 8px 24px rgba(108, 92, 231, .35);
        border-color: transparent;
    }

    .nav-link i {
        width: 20px;
        text-align: center;
        font-size: 15px;
    }

    .sidebar-bottom {
        padding: 16px 16px 0;
    }

    .sidebar-card {
        background: rgba(255, 255, 255, .05);
        border: 1px solid rgba(255, 255, 255, .06);
        border-radius: 14px;
        padding: 16px;
        text-align: center;
    }

    .sidebar-card i {
        font-size: 22px;
        color: var(--accent);
        margin-bottom: 8px;
    }

    .sidebar-card p {
        color: #fff;
        font-size: 13px;
        font-weight: 600;
        margin-bottom: 4px;
    }

    .sidebar-card a {
        color: var(--text-light);
        font-size: 12px;
        word-break: break-all;
    }

    .sidebar-card a:hover {
        color: #fff;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(15, 23, 42, .55);
        z-index: 1030;
    }

    .sidebar-overlay.show {
        display: block;
    }

    .main-wrapper {
        flex: 1;
        margin-left: var(--sidebar-width);
        display: flex;
        flex-direction: column;
        min-height: 100vh;
        width: calc(100% - var(--sidebar-width));
    }

    .mobile-header {
        display: none;
        position: sticky;
        top: 0;
        z-index: 1020;
        background: var(--dark-bg);
        padding: 14px 20px;
        align-items: center;
        justify-content: space-between;
        box-shadow: 0 4px 16px rgba(15, 23, 42, .2);
    }

    .mobile-brand .brand-text {
        font-size: 15px;
    }

    .mobile-toggle {
        width: 42px;
        height: 42px;
        border-radius: 12px;
        background: rgba(255, 255, 255, .08);
        border: 1px solid rgba(255, 255, 255, .1);
        color: #fff;
        font-size: 18px;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: background var(--transition);
    }

    .mobile-toggle:hover {
        background: rgba(255, 255, 255, .16);
    }

    main {
        flex: 1;
    }

    .category-hero {
        position: relative;
        padding: 96px 0 84px;
        color: #fff;
        background-image: linear-gradient(120deg, rgba(15, 23, 42, .92), rgba(15, 23, 42, .62)), url('/assets/images/backpic/back-1.png');
        background-size: cover;
        background-position: center;
        overflow: hidden;
    }

    .category-hero::after {
        content: '';
        position: absolute;
        bottom: -60px;
        right: -40px;
        width: 360px;
        height: 360px;
        background: radial-gradient(circle, rgba(108, 92, 231, .35), transparent 65%);
        border-radius: 50%;
        pointer-events: none;
    }

    .category-hero .container-custom {
        position: relative;
        z-index: 2;
    }

    .breadcrumb-custom {
        font-size: 13px;
        color: rgba(255, 255, 255, .6);
        margin-bottom: 18px;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .breadcrumb-custom a:hover {
        color: var(--accent);
    }

    .breadcrumb-custom .sep {
        opacity: .5;
    }

    .category-hero h1 {
        font-size: 42px;
        font-weight: 800;
        letter-spacing: -.02em;
        margin-bottom: 16px;
        line-height: 1.2;
    }

    .category-hero h1 .highlight {
        background: linear-gradient(90deg, var(--accent), var(--primary-light));
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .category-hero .hero-desc {
        font-size: 16px;
        color: rgba(255, 255, 255, .78);
        max-width: 560px;
        margin-bottom: 30px;
        line-height: 1.8;
    }

    .hero-stats {
        display: flex;
        gap: 32px;
        flex-wrap: wrap;
    }

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

    .hero-stat .stat-value {
        font-size: 28px;
        font-weight: 800;
        line-height: 1;
        color: #fff;
    }

    .hero-stat .stat-label {
        font-size: 12px;
        color: rgba(255, 255, 255, .6);
        line-height: 1.4;
    }

    .section-pad {
        padding: 72px 0;
    }

    .section-pad-sm {
        padding: 48px 0;
    }

    .section-bg-white {
        background: #fff;
    }

    .section-header {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        gap: 16px;
        margin-bottom: 36px;
    }

    .section-header h2 {
        font-size: 28px;
        font-weight: 700;
        letter-spacing: -.01em;
        margin: 0;
        line-height: 1.3;
        position: relative;
        padding-bottom: 12px;
    }

    .section-header h2::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 44px;
        height: 3px;
        border-radius: 2px;
        background: linear-gradient(90deg, var(--primary), var(--accent));
    }

    .section-header .section-more {
        font-size: 14px;
        color: var(--text-weak);
        font-weight: 500;
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding-bottom: 4px;
        border-bottom: 1px solid transparent;
        white-space: nowrap;
    }

    .section-header .section-more:hover {
        color: var(--primary);
        border-bottom-color: var(--primary);
    }

    .tag-filter {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        background: #fff;
        padding: 18px 20px;
        border-radius: 16px;
        box-shadow: var(--shadow-sm);
        border: 1px solid rgba(226, 232, 240, .6);
    }

    .tag-filter .tag {
        padding: 7px 18px;
        border-radius: 50px;
        background: var(--body-bg);
        border: 1px solid transparent;
        font-size: 13px;
        font-weight: 500;
        color: var(--text-weak);
        cursor: pointer;
        transition: all var(--transition);
    }

    .tag-filter .tag:hover {
        color: var(--primary);
        background: rgba(108, 92, 231, .06);
    }

    .tag-filter .tag.active {
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        color: #fff;
        box-shadow: 0 4px 16px rgba(108, 92, 231, .3);
    }

    .news-card {
        background: #fff;
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        border: 1px solid rgba(226, 232, 240, .6);
        transition: all .35s;
        height: 100%;
        display: flex;
        flex-direction: column;
    }

    .news-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
    }

    .card-cover {
        position: relative;
        aspect-ratio: 16 / 10;
        overflow: hidden;
        background: var(--dark-bg-2);
    }

    .card-cover img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .5s ease;
    }

    .news-card:hover .card-cover img {
        transform: scale(1.06);
    }

    .hot-badge {
        position: absolute;
        top: 14px;
        left: 14px;
        background: linear-gradient(135deg, #ff6b35, #f7c948);
        color: #fff;
        font-size: 11px;
        font-weight: 700;
        padding: 4px 12px;
        border-radius: 50px;
        letter-spacing: .02em;
        box-shadow: 0 4px 12px rgba(255, 107, 53, .3);
        z-index: 2;
    }

    .card-body {
        padding: 22px;
        display: flex;
        flex-direction: column;
        flex: 1;
    }

    .card-tag {
        display: inline-block;
        font-size: 12px;
        color: var(--primary);
        background: rgba(108, 92, 231, .08);
        padding: 4px 10px;
        border-radius: 6px;
        margin-bottom: 12px;
        font-weight: 600;
        width: fit-content;
    }

    .card-body h3 {
        font-size: 17px;
        font-weight: 600;
        line-height: 1.55;
        margin-bottom: 10px;
        color: var(--text-main);
        transition: color var(--transition);
    }

    .news-card:hover .card-body h3 {
        color: var(--primary);
    }

    .card-body p {
        font-size: 13px;
        color: var(--text-weak);
        line-height: 1.75;
        margin-bottom: 16px;
        flex: 1;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .card-meta {
        display: flex;
        gap: 16px;
        font-size: 12px;
        color: var(--text-light);
        border-top: 1px solid var(--border);
        padding-top: 14px;
    }

    .card-meta i {
        margin-right: 4px;
    }

    .schedule-section .schedule-list {
        background: #fff;
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-sm);
        border: 1px solid rgba(226, 232, 240, .6);
        padding: 0 28px;
    }

    .schedule-row {
        display: flex;
        align-items: center;
        gap: 20px;
        padding: 24px 0;
        border-bottom: 1px solid var(--border);
    }

    .schedule-row:last-child {
        border-bottom: none;
    }

    .schedule-date {
        min-width: 110px;
        text-align: center;
        background: var(--body-bg);
        border-radius: 12px;
        padding: 12px 8px;
        font-weight: 700;
        line-height: 1.4;
    }

    .schedule-date .day {
        font-size: 22px;
        display: block;
        color: var(--text-main);
    }

    .schedule-date .month {
        font-size: 12px;
        color: var(--text-weak);
    }

    .schedule-info {
        flex: 1;
    }

    .schedule-info h3 {
        font-size: 16px;
        font-weight: 600;
        margin-bottom: 4px;
    }

    .schedule-info p {
        font-size: 13px;
        color: var(--text-weak);
        margin: 0;
    }

    .schedule-tag {
        font-size: 12px;
        font-weight: 600;
        padding: 6px 14px;
        border-radius: 50px;
        background: rgba(108, 92, 231, .08);
        color: var(--primary);
        white-space: nowrap;
    }

    .schedule-tag.live {
        background: rgba(255, 107, 53, .1);
        color: #ff6b35;
    }

    .schedule-tag.upcoming {
        background: rgba(0, 210, 255, .1);
        color: #0090b0;
    }

    .ranking-section .ranking-list {
        max-width: 860px;
        margin: 0 auto;
    }

    .ranking-item {
        display: flex;
        align-items: center;
        gap: 16px;
        padding: 16px 22px;
        background: #fff;
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        border: 1px solid rgba(226, 232, 240, .6);
        margin-bottom: 12px;
        transition: all var(--transition);
    }

    .ranking-item:hover {
        transform: translateX(6px);
        box-shadow: var(--shadow-md);
        border-color: rgba(108, 92, 231, .2);
    }

    .rank-num {
        width: 36px;
        height: 36px;
        min-width: 36px;
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 700;
        font-size: 14px;
        background: var(--body-bg);
        color: var(--text-weak);
    }

    .rank-num.top {
        background: linear-gradient(135deg, #f7c948, #ff9f43);
        color: #fff;
        box-shadow: 0 4px 12px rgba(247, 201, 72, .3);
    }

    .rank-team {
        flex: 1;
        font-size: 15px;
        font-weight: 600;
    }

    .rank-team small {
        display: block;
        font-size: 12px;
        color: var(--text-weak);
        font-weight: 400;
    }

    .rank-stats {
        font-size: 13px;
        color: var(--text-weak);
        text-align: right;
    }

    .rank-stats strong {
        color: var(--primary);
        font-size: 16px;
    }

    .rank-progress {
        width: 120px;
        height: 6px;
        border-radius: 4px;
        background: var(--body-bg);
        overflow: hidden;
        margin-left: 12px;
    }

    .rank-progress .bar {
        height: 100%;
        border-radius: 4px;
        background: linear-gradient(90deg, var(--primary), var(--accent));
    }

    .feature-card {
        position: relative;
        border-radius: var(--radius-lg);
        overflow: hidden;
        height: 300px;
        box-shadow: var(--shadow-sm);
        transition: all .35s;
        display: block;
    }

    .feature-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
    }

    .feature-card>img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .5s;
    }

    .feature-card:hover>img {
        transform: scale(1.05);
    }

    .feature-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, transparent 25%, rgba(15, 23, 42, .88));
        display: flex;
        align-items: flex-end;
        padding: 26px;
        color: #fff;
    }

    .feature-overlay .feature-tag {
        font-size: 11px;
        font-weight: 700;
        background: rgba(255, 255, 255, .16);
        backdrop-filter: blur(8px);
        padding: 4px 12px;
        border-radius: 50px;
        display: inline-block;
        margin-bottom: 10px;
        width: fit-content;
    }

    .feature-overlay h3 {
        font-size: 20px;
        font-weight: 700;
        line-height: 1.4;
        margin: 0;
    }

    .feature-overlay p {
        font-size: 13px;
        color: rgba(255, 255, 255, .72);
        margin: 6px 0 0;
    }

    .faq-section .accordion {
        max-width: 860px;
        margin: 0 auto;
    }

    .accordion-item {
        border: 1px solid var(--border);
        border-radius: var(--radius-md) !important;
        margin-bottom: 14px;
        overflow: hidden;
        background: #fff;
        box-shadow: var(--shadow-sm);
    }

    .accordion-button {
        padding: 20px 24px;
        font-size: 15px;
        font-weight: 600;
        background: #fff;
        color: var(--text-main);
        border: none;
        transition: color var(--transition);
    }

    .accordion-button:focus {
        box-shadow: none;
    }

    .accordion-button:not(.collapsed) {
        background: #fff;
        color: var(--primary);
        box-shadow: none;
    }

    .accordion-button::after {
        background-size: 14px;
        opacity: .6;
    }

    .accordion-button:not(.collapsed)::after {
        opacity: 1;
    }

    .accordion-body {
        padding: 4px 24px 22px;
        color: var(--text-weak);
        line-height: 1.8;
        font-size: 14px;
    }

    .cta-section {
        padding: 72px 0 88px;
    }

    .cta-card {
        background: linear-gradient(135deg, #1e293b, #0f172a);
        border-radius: 28px;
        padding: 64px 48px;
        text-align: center;
        color: #fff;
        position: relative;
        overflow: hidden;
    }

    .cta-card::before {
        content: '';
        position: absolute;
        top: -80px;
        right: -60px;
        width: 300px;
        height: 300px;
        background: radial-gradient(circle, rgba(108, 92, 231, .4), transparent 65%);
        border-radius: 50%;
    }

    .cta-card::after {
        content: '';
        position: absolute;
        bottom: -100px;
        left: -40px;
        width: 260px;
        height: 260px;
        background: radial-gradient(circle, rgba(0, 210, 255, .25), transparent 65%);
        border-radius: 50%;
    }

    .cta-card .cta-content {
        position: relative;
        z-index: 2;
    }

    .cta-card h2 {
        font-size: 30px;
        font-weight: 800;
        margin-bottom: 12px;
        letter-spacing: -.01em;
    }

    .cta-card p {
        color: rgba(255, 255, 255, .7);
        font-size: 15px;
        margin-bottom: 30px;
    }

    .cta-form {
        display: flex;
        gap: 12px;
        max-width: 500px;
        margin: 0 auto;
    }

    .cta-form .form-control {
        flex: 1;
        padding: 14px 20px;
        border-radius: 50px;
        border: 1px solid rgba(255, 255, 255, .14);
        background: rgba(255, 255, 255, .08);
        color: #fff;
        font-size: 14px;
    }

    .cta-form .form-control::placeholder {
        color: rgba(255, 255, 255, .4);
    }

    .cta-form .form-control:focus {
        background: rgba(255, 255, 255, .12);
        border-color: var(--accent);
        box-shadow: none;
    }

    .cta-form .btn-subscribe {
        padding: 14px 30px;
        border-radius: 50px;
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        border: none;
        color: #fff;
        font-weight: 600;
        font-size: 14px;
        white-space: nowrap;
        cursor: pointer;
        transition: all var(--transition);
        box-shadow: 0 8px 24px rgba(108, 92, 231, .35);
    }

    .cta-form .btn-subscribe:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 32px rgba(108, 92, 231, .45);
    }

    .site-footer {
        background: var(--dark-bg);
        color: var(--text-light);
        padding: 64px 0 24px;
        margin-top: auto;
    }

    .site-footer .footer-brand {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 17px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 18px;
    }

    .site-footer .footer-brand .brand-icon {
        width: 38px;
        height: 38px;
        min-width: 38px;
        font-size: 15px;
    }

    .footer-desc {
        font-size: 14px;
        line-height: 1.75;
        color: var(--text-light);
        margin-bottom: 0;
        max-width: 320px;
    }

    .footer-title {
        font-size: 15px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 20px;
        letter-spacing: .02em;
    }

    .footer-links {
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .footer-links li {
        margin-bottom: 10px;
    }

    .footer-links a {
        display: inline-block;
        color: var(--text-light);
        font-size: 14px;
        transition: all var(--transition);
    }

    .footer-links a:hover {
        color: #fff;
        transform: translateX(4px);
    }

    .footer-contact div {
        margin-bottom: 12px;
        font-size: 14px;
        display: flex;
        align-items: center;
        gap: 10px;
        color: var(--text-light);
    }

    .footer-contact i {
        color: var(--primary-light);
        width: 16px;
        text-align: center;
    }

    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, .08);
        padding-top: 24px;
        margin-top: 48px;
        text-align: center;
        font-size: 13px;
        color: rgba(255, 255, 255, .35);
    }

    @media (max-width: 1199px) {
        .schedule-date {
            min-width: 90px;
        }

        .rank-progress {
            width: 80px;
        }
    }

    @media (max-width: 991px) {
        .sidebar {
            transform: translateX(-100%);
            box-shadow: none;
        }

        .sidebar.open {
            transform: translateX(0);
            box-shadow: 24px 0 48px rgba(0, 0, 0, .2);
        }

        .main-wrapper {
            margin-left: 0;
            width: 100%;
        }

        .mobile-header {
            display: flex;
        }

        .section-pad {
            padding: 56px 0;
        }

        .category-hero {
            padding: 72px 0 64px;
        }

        .category-hero h1 {
            font-size: 32px;
        }
    }

    @media (max-width: 767px) {
        body {
            font-size: 14px;
        }

        .container-custom {
            padding: 0 18px;
        }

        .section-header {
            flex-direction: row;
            align-items: center;
            margin-bottom: 28px;
        }

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

        .section-header .section-more {
            font-size: 12px;
        }

        .tag-filter {
            padding: 14px;
            gap: 8px;
        }

        .tag-filter .tag {
            font-size: 12px;
            padding: 6px 14px;
        }

        .card-body {
            padding: 18px;
        }

        .card-body h3 {
            font-size: 16px;
        }

        .schedule-section .schedule-list {
            padding: 0 18px;
        }

        .schedule-row {
            flex-wrap: wrap;
            gap: 10px;
            padding: 18px 0;
        }

        .schedule-date {
            min-width: 80px;
            padding: 8px 6px;
        }

        .schedule-date .day {
            font-size: 18px;
        }

        .ranking-item {
            flex-wrap: wrap;
            padding: 14px 16px;
            gap: 10px;
        }

        .rank-progress {
            width: 100%;
            margin-left: 0;
            order: 4;
        }

        .rank-stats {
            font-size: 12px;
        }

        .feature-card {
            height: 240px;
        }

        .feature-overlay {
            padding: 20px;
        }

        .feature-overlay h3 {
            font-size: 17px;
        }

        .cta-card {
            padding: 44px 22px;
            border-radius: 20px;
        }

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

        .cta-form {
            flex-direction: column;
            gap: 10px;
        }

        .cta-form .btn-subscribe {
            width: 100%;
        }

        .site-footer {
            padding: 48px 0 20px;
        }

        .footer-bottom {
            margin-top: 36px;
        }
    }

    @media (max-width: 520px) {
        .category-hero h1 {
            font-size: 26px;
        }

        .hero-desc {
            font-size: 14px !important;
        }

        .hero-stat .stat-value {
            font-size: 20px;
        }

        .hero-stats {
            gap: 18px;
        }

        .brand-text {
            font-size: 14px;
        }
    }

/* roulang page: article */
:root {
            --primary: #7c5cfc;
            --primary-light: #9d8cff;
            --primary-dark: #5b3fd9;
            --accent: #00d2ff;
            --accent-warm: #ff6b9d;
            --bg-body: #080e1a;
            --bg-card: #121a2b;
            --bg-deep: #0c1524;
            --bg-sidebar: #0d1626;
            --border: rgba(255, 255, 255, 0.08);
            --text-main: #ecf0fa;
            --text-muted: #8a94a8;
            --text-soft: #5f6b80;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 9px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 18px 44px rgba(124, 92, 252, 0.15);
            --font-body: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: var(--font-body);
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: all 0.3s ease;
        }
        a:hover {
            color: var(--primary-light);
        }
        img {
            max-width: 100%;
            height: auto;
            vertical-align: middle;
        }
        button,
        input,
        textarea {
            font-family: var(--font-body);
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-main);
            margin-top: 0;
        }
        p {
            margin-top: 0;
        }
        .container-custom {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 260px;
            height: 100vh;
            background: linear-gradient(180deg, #0d1626 0%, #0a1020 100%);
            border-right: 1px solid var(--border);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            padding: 30px 20px 24px;
            overflow-y: auto;
        }
        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 0 8px 22px;
            border-bottom: 1px solid var(--border);
        }
        .brand-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 19px;
            box-shadow: 0 6px 18px rgba(124, 92, 252, 0.35);
            flex-shrink: 0;
        }
        .brand-text {
            font-size: 16px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: 0.6px;
            line-height: 1.35;
        }
        .sidebar-divider {
            height: 1px;
            background: var(--border);
            margin: 18px 8px 0;
        }
        .sidebar-nav {
            margin-top: 22px;
            flex: 1;
        }
        .nav-section-title {
            font-size: 11px;
            letter-spacing: 2.5px;
            color: var(--text-soft);
            text-transform: uppercase;
            margin-bottom: 14px;
            padding: 0 12px;
            font-weight: 700;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 13px;
            padding: 13px 14px;
            border-radius: 12px;
            color: var(--text-muted);
            text-decoration: none;
            font-weight: 600;
            font-size: 15px;
            transition: all 0.25s ease;
            margin-bottom: 5px;
            border: 1px solid transparent;
        }
        .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            flex-shrink: 0;
        }
        .nav-link:hover {
            color: var(--text-main);
            background: rgba(124, 92, 252, 0.1);
            transform: translateX(3px);
            border-color: rgba(124, 92, 252, 0.2);
        }
        .nav-link.active {
            color: #fff;
            background: linear-gradient(135deg, rgba(124, 92, 252, 0.22), rgba(0, 210, 255, 0.12));
            border-color: rgba(124, 92, 252, 0.35);
            box-shadow: 0 4px 16px rgba(124, 92, 252, 0.12);
        }
        .sidebar-footer {
            margin-top: auto;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 16px;
        }
        .sidebar-support {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .sidebar-support i {
            font-size: 20px;
            color: var(--accent);
        }
        .sidebar-support span {
            display: block;
            font-size: 12px;
            color: var(--text-soft);
        }
        .sidebar-support strong {
            font-size: 16px;
            color: var(--text-main);
            font-weight: 800;
            letter-spacing: 0.5px;
        }
        .main-wrap {
            margin-left: 260px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .site-main {
            flex: 1;
        }
        .article-hero {
            position: relative;
            padding: 62px 0 46px;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            border-bottom: 1px solid var(--border);
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(8, 14, 26, 0.94) 25%, rgba(8, 14, 26, 0.7) 60%, rgba(8, 14, 26, 0.45));
        }
        .article-hero .container-custom {
            position: relative;
            z-index: 1;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: var(--text-soft);
            margin-bottom: 30px;
        }
        .breadcrumb-custom a {
            color: var(--text-muted);
            text-decoration: none;
        }
        .breadcrumb-custom a:hover {
            color: var(--primary-light);
        }
        .breadcrumb-custom i {
            font-size: 11px;
            color: var(--text-soft);
        }
        .breadcrumb-custom span.current {
            color: var(--text-muted);
            max-width: 280px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .article-hero-content {
            max-width: 820px;
        }
        .article-category-badge {
            display: inline-block;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 30px;
            margin-bottom: 18px;
            letter-spacing: 1.5px;
            box-shadow: 0 4px 16px rgba(124, 92, 252, 0.3);
        }
        .article-hero h1 {
            font-size: 33px;
            font-weight: 800;
            line-height: 1.35;
            color: #fff;
            margin-bottom: 20px;
            margin-top: 0;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 22px;
            color: var(--text-muted);
            font-size: 14px;
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }
        .article-meta i {
            font-size: 15px;
            color: var(--primary-light);
        }
        .article-wrap {
            padding: 46px 0 70px;
        }
        .article-cover {
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 28px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
        }
        .article-cover img {
            width: 100%;
            object-fit: cover;
            display: block;
        }
        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 38px;
            border: 1px solid var(--border);
            line-height: 1.9;
            font-size: 16px;
            color: #c6cddf;
        }
        .article-content h2 {
            font-size: 25px;
            margin: 34px 0 16px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border);
            color: #fff;
        }
        .article-content h3 {
            font-size: 20px;
            margin: 28px 0 12px;
            color: #f0f2fb;
        }
        .article-content h4 {
            font-size: 17px;
            margin: 22px 0 10px;
            color: #dfe3f0;
        }
        .article-content p {
            margin-bottom: 18px;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 18px;
            padding-left: 22px;
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content blockquote {
            margin: 24px 0;
            padding: 18px 24px;
            background: rgba(124, 92, 252, 0.08);
            border-left: 4px solid var(--primary);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--text-muted);
            font-style: normal;
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 20px 0;
            box-shadow: var(--shadow-card);
            max-width: 100%;
        }
        .article-content a {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 14px;
        }
        .article-content th,
        .article-content td {
            border: 1px solid var(--border);
            padding: 12px 14px;
            text-align: left;
        }
        .article-content th {
            background: rgba(124, 92, 252, 0.1);
            color: #fff;
            font-weight: 700;
        }
        .article-content code {
            background: rgba(0, 210, 255, 0.1);
            padding: 3px 8px;
            border-radius: 6px;
            font-size: 14px;
            color: var(--accent);
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 28px;
        }
        .tag-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            color: var(--text-muted);
            border-radius: 30px;
            padding: 7px 16px;
            font-size: 13px;
            transition: all 0.25s ease;
            cursor: default;
        }
        .tag-item i {
            font-size: 11px;
            color: var(--primary-light);
        }
        .tag-item:hover {
            border-color: rgba(124, 92, 252, 0.5);
            color: var(--primary-light);
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 30px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-share span {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 600;
            margin-right: 4px;
        }
        .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border);
            color: var(--text-muted);
            font-size: 15px;
            cursor: pointer;
            transition: all 0.25s ease;
            text-decoration: none;
        }
        .share-btn:hover {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            border-color: transparent;
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(124, 92, 252, 0.3);
        }
        .not-found-box {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
        }
        .not-found-box i {
            font-size: 52px;
            color: var(--primary-light);
            margin-bottom: 18px;
            display: block;
        }
        .not-found-box h2 {
            font-size: 26px;
            margin-bottom: 12px;
            color: #fff;
        }
        .not-found-box p {
            color: var(--text-muted);
            margin-bottom: 26px;
        }
        .not-found-box .btn-custom {
            margin: 0 6px;
        }
        .article-aside .side-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 24px;
            margin-bottom: 20px;
        }
        .side-card-title {
            font-size: 17px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .side-card-title i {
            color: var(--accent);
            font-size: 16px;
        }
        .side-post-item {
            display: flex;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid var(--border);
            text-decoration: none;
            align-items: flex-start;
            transition: all 0.25s ease;
        }
        .side-post-item:last-child {
            border-bottom: none;
            padding-bottom: 4px;
        }
        .side-post-item:hover {
            padding-left: 6px;
        }
        .side-post-index {
            font-size: 13px;
            font-weight: 800;
            color: var(--text-soft);
            line-height: 1.6;
            min-width: 22px;
            font-style: normal;
        }
        .side-post-index.hot {
            color: var(--accent-warm);
        }
        .side-post-body {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .side-post-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .side-post-meta {
            font-size: 12px;
            color: var(--text-soft);
        }
        .side-guide-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .side-guide-list li {
            margin-bottom: 10px;
        }
        .side-guide-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 14px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-size: 14px;
            font-weight: 600;
            transition: all 0.25s ease;
            text-decoration: none;
        }
        .side-guide-list a i {
            font-size: 11px;
            color: var(--primary-light);
            transition: all 0.25s ease;
        }
        .side-guide-list a:hover {
            background: rgba(124, 92, 252, 0.1);
            border-color: rgba(124, 92, 252, 0.4);
            color: var(--text-main);
            transform: translateX(3px);
        }
        .related-section {
            padding: 70px 0;
            background: var(--bg-deep);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .section-head {
            text-align: center;
            max-width: 560px;
            margin: 0 auto 42px;
        }
        .section-label {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 10px;
            background: rgba(0, 210, 255, 0.08);
            border: 1px solid rgba(0, 210, 255, 0.2);
            padding: 5px 16px;
            border-radius: 30px;
        }
        .section-head h2 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 10px;
            color: #fff;
        }
        .section-head p {
            color: var(--text-muted);
            font-size: 15px;
            margin-bottom: 0;
        }
        .related-card {
            display: flex;
            flex-direction: column;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all 0.3s ease;
            height: 100%;
            text-decoration: none;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(124, 92, 252, 0.4);
        }
        .related-card-cover {
            height: 170px;
            background-size: cover;
            background-position: center;
            position: relative;
            flex-shrink: 0;
        }
        .related-card-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(10, 15, 26, 0.4));
        }
        .related-card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 1;
            background: rgba(10, 15, 26, 0.75);
            backdrop-filter: blur(8px);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 30px;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .related-card-body {
            padding: 20px 22px 18px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .related-card-body h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.5;
            color: var(--text-main);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color 0.25s ease;
        }
        .related-card:hover .related-card-body h3 {
            color: var(--primary-light);
        }
        .related-card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }
        .related-card-foot {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: auto;
            font-size: 13px;
            color: var(--text-soft);
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }
        .related-card-foot .read-more {
            color: var(--accent);
            font-weight: 600;
            transition: all 0.25s ease;
        }
        .related-card:hover .read-more {
            gap: 6px;
            letter-spacing: 0.5px;
        }
        .faq-section {
            padding: 70px 0;
            background: var(--bg-body);
        }
        .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border) !important;
            border-radius: var(--radius-md) !important;
            margin-bottom: 14px;
            overflow: hidden;
        }
        .accordion-button {
            background: transparent;
            color: var(--text-main);
            font-weight: 700;
            font-size: 16px;
            padding: 20px 24px;
            box-shadow: none;
            border: none;
        }
        .accordion-button:focus {
            box-shadow: none;
            border-color: transparent;
        }
        .accordion-button:not(.collapsed) {
            background: rgba(124, 92, 252, 0.08);
            color: var(--primary-light);
        }
        .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%238a94a8'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
            transition: transform 0.3s ease;
        }
        .accordion-button:not(.collapsed)::after {
            filter: brightness(2);
        }
        .accordion-body {
            padding: 4px 24px 22px;
            color: var(--text-muted);
            line-height: 1.8;
            font-size: 15px;
            background: var(--bg-card);
        }
        .cta-section {
            padding: 64px 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            position: relative;
            border-top: 1px solid var(--border);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 16, 30, 0.94), rgba(18, 22, 42, 0.86));
        }
        .cta-box {
            position: relative;
            z-index: 1;
            background: rgba(18, 26, 43, 0.9);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 52px 40px;
            text-align: center;
            max-width: 860px;
            margin: 0 auto;
            box-shadow: var(--shadow-card);
        }
        .cta-box h2 {
            font-size: 28px;
            margin-bottom: 14px;
            color: #fff;
        }
        .cta-box p {
            color: var(--text-muted);
            font-size: 15px;
            margin-bottom: 26px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-custom {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            padding: 13px 30px;
            border-radius: 12px;
            font-weight: 700;
            font-size: 15px;
            border: none;
            cursor: pointer;
            text-decoration: none;
            transition: all 0.3s ease;
            line-height: 1.4;
        }
        .btn-main {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            box-shadow: 0 6px 20px rgba(124, 92, 252, 0.3);
        }
        .btn-main:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(124, 92, 252, 0.4);
            color: #fff;
        }
        .btn-ghost {
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-main);
            border: 1px solid var(--border);
        }
        .btn-ghost:hover {
            border-color: var(--primary);
            color: var(--primary-light);
            background: rgba(124, 92, 252, 0.08);
            transform: translateY(-2px);
        }
        .btn-accent {
            background: transparent;
            color: var(--accent);
            border: 1px solid var(--accent);
        }
        .btn-accent:hover {
            background: rgba(0, 210, 255, 0.1);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .site-footer {
            background: #0a101e;
            border-top: 1px solid var(--border);
            padding: 52px 0 24px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 18px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 14px;
        }
        .footer-brand .brand-icon {
            width: 36px;
            height: 36px;
            font-size: 15px;
        }
        .footer-desc {
            color: var(--text-soft);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border);
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 14px;
            text-decoration: none;
            transition: all 0.25s ease;
        }
        .footer-links a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-contact div {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-contact i {
            color: var(--primary-light);
            width: 18px;
            text-align: center;
        }
        .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid var(--border);
            text-align: center;
            color: var(--text-soft);
            font-size: 13px;
        }
        .footer-bottom p {
            margin-bottom: 0;
        }
        .back-to-top {
            position: fixed;
            right: 28px;
            bottom: 28px;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1030;
            opacity: 0;
            visibility: hidden;
            transform: translateY(12px);
            transition: all 0.35s ease;
            box-shadow: 0 8px 24px rgba(124, 92, 252, 0.35);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-to-top:hover {
            transform: translateY(-3px);
            color: #fff;
            box-shadow: 0 12px 30px rgba(124, 92, 252, 0.45);
        }
        .empty-tip {
            text-align: center;
            color: var(--text-soft);
            padding: 30px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            font-size: 14px;
        }
        @media (max-width: 991px) {
            .site-sidebar {
                width: 220px;
                padding: 24px 16px 20px;
            }
            .brand-text {
                font-size: 14px;
            }
            .main-wrap {
                margin-left: 220px;
            }
            .article-hero h1 {
                font-size: 28px;
            }
            .article-content {
                padding: 28px;
            }
            .related-card-cover {
                height: 150px;
            }
        }
        @media (max-width: 767px) {
            .site-sidebar {
                width: 100%;
                height: auto;
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                padding: 10px 16px 8px;
                flex-direction: column;
                background: rgba(13, 22, 38, 0.97);
                backdrop-filter: blur(14px);
                border-right: none;
                border-bottom: 1px solid var(--border);
                z-index: 1040;
                overflow: hidden;
            }
            .sidebar-brand {
                border-bottom: none;
                padding: 0 0 8px;
                gap: 10px;
            }
            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 14px;
                border-radius: 10px;
            }
            .brand-text {
                font-size: 15px;
            }
            .sidebar-divider {
                display: none;
            }
            .sidebar-nav {
                margin-top: 0;
                display: flex;
                overflow-x: auto;
                gap: 7px;
                padding: 2px 0 2px;
                scrollbar-width: none;
                -ms-overflow-style: none;
                flex-wrap: nowrap;
            }
            .sidebar-nav::-webkit-scrollbar {
                display: none;
            }
            .nav-section-title {
                display: none;
            }
            .nav-link {
                white-space: nowrap;
                padding: 8px 14px;
                font-size: 13px;
                border-radius: 24px;
                margin-bottom: 0;
                background: rgba(255, 255, 255, 0.04);
                border-color: transparent;
                gap: 7px;
            }
            .nav-link i {
                font-size: 12px;
                width: 16px;
            }
            .nav-link.active {
                background: linear-gradient(135deg, var(--primary), var(--accent));
                border-color: transparent;
                box-shadow: 0 4px 12px rgba(124, 92, 252, 0.3);
            }
            .nav-link:hover {
                transform: none;
            }
            .sidebar-footer {
                display: none;
            }
            .main-wrap {
                margin-left: 0;
                padding-top: 128px;
            }
            .article-hero {
                padding: 40px 0 32px;
            }
            .breadcrumb-custom {
                margin-bottom: 20px;
                font-size: 12px;
            }
            .article-hero h1 {
                font-size: 24px;
                line-height: 1.4;
            }
            .article-meta {
                gap: 10px 16px;
                font-size: 13px;
                flex-direction: column;
                align-items: flex-start;
            }
            .article-wrap {
                padding: 32px 0 50px;
            }
            .article-content {
                padding: 20px 18px;
                font-size: 15px;
                line-height: 1.85;
            }
            .article-content h2 {
                font-size: 21px;
            }
            .article-content h3 {
                font-size: 18px;
            }
            .related-section {
                padding: 50px 0;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .cta-section {
                padding: 44px 0;
            }
            .cta-box {
                padding: 36px 20px;
            }
            .cta-box h2 {
                font-size: 22px;
            }
            .container-custom {
                padding: 0 16px;
            }
            .article-tags {
                gap: 8px;
            }
            .tag-item {
                padding: 6px 12px;
                font-size: 12px;
            }
            .article-share {
                flex-wrap: wrap;
                gap: 10px;
            }
            .back-to-top {
                right: 16px;
                bottom: 16px;
                width: 42px;
                height: 42px;
                font-size: 14px;
            }
            .not-found-box {
                padding: 40px 20px;
            }
            .not-found-box h2 {
                font-size: 22px;
            }
            .not-found-box .btn-custom {
                padding: 11px 22px;
                font-size: 14px;
                margin-bottom: 8px;
            }
        }
        @media (max-width: 520px) {
            .article-cover {
                border-radius: var(--radius-md);
            }
            .related-card-cover {
                height: 140px;
            }
            .article-aside .side-card {
                padding: 18px;
            }
            .cta-box {
                padding: 30px 16px;
                border-radius: var(--radius-md);
            }
        }

/* roulang page: category2 */
:root {
  --primary: #8a5cff;
  --primary-light: #b79cff;
  --accent: #ffb84d;
  --bg-deep: #080c18;
  --bg-body: #0d1322;
  --bg-card: #151e30;
  --bg-card-hover: #193046;
  --text-main: #eef1f7;
  --text-weak: #8490a5;
  --border-main: rgba(255, 255, 255, 0.07);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 14px 44px rgba(138, 92, 255, 0.18);
  --spacing-section: 80px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.7;
  display: flex;
  align-items: stretch;
  min-height: 100vh;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s;
}

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

button,
input,
textarea {
  font-family: inherit;
}

.container-custom {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- Sidebar ---------- */
.site-sidebar {
  width: 280px;
  flex-shrink: 0;
  background: linear-gradient(180deg, #0d1220 0%, #0a0e1c 100%);
  border-right: 1px solid var(--border-main);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 1050;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 8px 22px;
  border-bottom: 1px solid var(--border-main);
  margin-bottom: 24px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), #4a2ccf);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #fff;
  box-shadow: 0 4px 16px rgba(138, 92, 255, 0.4);
}

.brand-text {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-main);
}

.nav-section-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-weak);
  margin: 0 0 14px;
  padding-left: 12px;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 16px;
  border-radius: var(--radius-md);
  color: var(--text-weak);
  font-size: 15px;
  font-weight: 500;
  transition: all 0.25s;
}

.nav-link i {
  width: 22px;
  text-align: center;
  font-size: 16px;
}

.nav-link:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
  transform: translateX(3px);
}

.nav-link.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(138, 92, 255, 0.22), rgba(138, 92, 255, 0.08));
  border: 1px solid rgba(138, 92, 255, 0.35);
  box-shadow: 0 4px 16px rgba(138, 92, 255, 0.12);
}

.sidebar-extras {
  margin-top: auto;
  padding: 20px 8px 0;
  border-top: 1px solid var(--border-main);
}

.sidebar-extras .extra-chip {
  background: rgba(255, 255, 255, 0.04);
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 13px;
  color: var(--text-weak);
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-extras .extra-chip i {
  color: var(--accent);
}

/* ---------- sidebar backdrop & mobile ---------- */
.sidebar-backdrop {
  display: none;
}

.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 1040;
  background: rgba(13, 18, 34, 0.92);
  backdrop-filter: blur(12px);
  padding: 12px 20px;
  border-bottom: 1px solid var(--border-main);
}

.mobile-header .menu-toggle {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-main);
  border-radius: 10px;
  width: 42px;
  height: 42px;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.mobile-header .menu-toggle:hover {
  background: rgba(255, 255, 255, 0.06);
}

.mobile-brand {
  font-weight: 700;
  color: var(--text-main);
  font-size: 16px;
}

.mobile-header-inner {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* ---------- Main wrapper ---------- */
.site-main {
  flex: 1;
  min-width: 0;
}

/* ---------- Hero / Page Banner ---------- */
.page-banner {
  position: relative;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  padding: 90px 0 70px;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(8, 12, 24, 0.88) 0%, rgba(8, 12, 24, 0.55) 55%, rgba(8, 12, 24, 0.3) 100%);
}

.page-banner .banner-content {
  position: relative;
  z-index: 2;
}

.page-banner .breadcrumb-custom {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 16px;
}

.page-banner .breadcrumb-custom a:hover {
  color: var(--accent);
}

.page-banner h1 {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.page-banner .banner-desc {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.75);
  max-width: 620px;
  line-height: 1.8;
  margin-bottom: 28px;
}

.banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(138, 92, 255, 0.18);
  border: 1px solid rgba(138, 92, 255, 0.35);
  color: #d4c6ff;
  padding: 8px 16px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 14px;
}

/* ---------- Section base ---------- */
.section-block {
  padding: var(--spacing-section) 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.section-head .section-kicker {
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary-light);
  margin-bottom: 8px;
  font-weight: 600;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  margin: 0;
  letter-spacing: 0.5px;
}

.section-head .section-sub {
  color: var(--text-weak);
  font-size: 15px;
  max-width: 440px;
  margin-top: 6px;
}

/* ---------- Filter chips ---------- */
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-chip {
  padding: 9px 22px;
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-main);
  font-size: 14px;
  color: var(--text-weak);
  cursor: pointer;
  transition: all 0.25s;
  font-weight: 500;
}

.filter-chip:hover {
  border-color: rgba(138, 92, 255, 0.5);
  color: var(--text-main);
  background: rgba(138, 92, 255, 0.08);
}

.filter-chip.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(138, 92, 255, 0.35);
}

/* ---------- Cards ---------- */
.strategy-card {
  background: var(--bg-card);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.35s;
  height: 100%;
}

.strategy-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(138, 92, 255, 0.3);
}

.strategy-card .card-cover {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.strategy-card .card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.strategy-card:hover .card-cover img {
  transform: scale(1.06);
}

.card-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
}

.card-tag span {
  background: rgba(13, 18, 34, 0.85);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.card-body-content {
  padding: 20px 20px 18px;
}

.card-body-content h3 {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-body-content h3 a:hover {
  color: var(--primary-light);
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  color: var(--text-weak);
}

.card-meta .meta-item {
  display: flex;
  align-items: center;
  gap: 5px;
}

/* ---------- Featured feature block ---------- */
.feature-block {
  background: linear-gradient(135deg, rgba(138, 92, 255, 0.1), rgba(13, 18, 34, 0.6));
  border: 1px solid rgba(138, 92, 255, 0.2);
  border-radius: 24px;
  overflow: hidden;
  padding: 0;
}

.feature-block .feature-img {
  height: 100%;
  min-height: 360px;
}

.feature-block .feature-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-content {
  padding: 48px 40px;
}

.feature-content .feature-tag {
  display: inline-block;
  background: rgba(255, 184, 77, 0.15);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 30px;
  margin-bottom: 18px;
}

.feature-content h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 18px;
}

.feature-content p {
  color: var(--text-weak);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 20px;
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
}

.feature-list li i {
  color: var(--primary-light);
  margin-top: 4px;
}

/* ---------- Ranking list ---------- */
.rank-list {
  background: var(--bg-card);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
}

.rank-item {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.2s;
}

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

.rank-item:hover {
  background: rgba(255, 255, 255, 0.03);
}

.rank-num {
  font-size: 22px;
  font-weight: 800;
  width: 38px;
  text-align: center;
  color: rgba(255, 255, 255, 0.2);
}

.rank-item:nth-child(1) .rank-num {
  color: var(--accent);
}

.rank-item:nth-child(2) .rank-num {
  color: #d8d8e8;
}

.rank-item:nth-child(3) .rank-num {
  color: #c88a5a;
}

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

.rank-info .rank-title {
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rank-info .rank-sub {
  font-size: 13px;
  color: var(--text-weak);
}

.rank-heat {
  font-size: 13px;
  color: var(--text-weak);
  white-space: nowrap;
}

.rank-heat i {
  color: var(--accent);
  margin-right: 4px;
}

/* ---------- Timeline ---------- */
.version-timeline {
  position: relative;
  padding-left: 30px;
}

.version-timeline::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(to bottom, rgba(138, 92, 255, 0.6), rgba(138, 92, 255, 0.1));
}

.timeline-item {
  position: relative;
  padding: 18px 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -25px;
  top: 26px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid var(--bg-body);
  box-shadow: 0 0 0 3px rgba(138, 92, 255, 0.2);
}

.timeline-item .timeline-date {
  font-size: 13px;
  color: var(--primary-light);
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline-item .timeline-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.timeline-item .timeline-desc {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
}

/* ---------- FAQ ---------- */
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-md);
  padding: 24px 26px;
  margin-bottom: 14px;
  transition: all 0.25s;
}

.faq-item:hover {
  border-color: rgba(138, 92, 255, 0.3);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.faq-item .faq-q {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 10px;
}

.faq-item .faq-q i {
  color: var(--primary-light);
  font-size: 18px;
}

.faq-item .faq-a {
  padding-left: 34px;
  color: var(--text-weak);
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- Buttons ---------- */
.btn-custom {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 40px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.25s;
}

.btn-primary-custom {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 18px rgba(138, 92, 255, 0.35);
}

.btn-primary-custom:hover {
  background: #9a6dff;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(138, 92, 255, 0.45);
  color: #fff;
}

.btn-outline-custom {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: var(--text-main);
}

.btn-outline-custom:hover {
  border-color: var(--primary-light);
  color: var(--primary-light);
  background: rgba(138, 92, 255, 0.08);
}

.btn-accent-custom {
  background: var(--accent);
  color: #1a1408;
  box-shadow: 0 4px 16px rgba(255, 184, 77, 0.3);
}

.btn-accent-custom:hover {
  background: #ffc566;
  transform: translateY(-2px);
  color: #1a1408;
  box-shadow: 0 8px 24px rgba(255, 184, 77, 0.4);
}

/* ---------- CTA ---------- */
.cta-block {
  background: linear-gradient(135deg, rgba(138, 92, 255, 0.18), rgba(13, 18, 34, 0.8)), url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  border-radius: 24px;
  border: 1px solid rgba(138, 92, 255, 0.3);
  padding: 60px 50px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-block::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(8, 12, 24, 0.55);
}

.cta-inner {
  position: relative;
  z-index: 2;
}

.cta-block h2 {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 14px;
}

.cta-block p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 16px;
  max-width: 560px;
  margin: 0 auto 28px;
}

/* ---------- Footer ---------- */
.site-footer {
  background: #080c18;
  border-top: 1px solid var(--border-main);
  padding: 60px 0 0;
  margin-top: 20px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-brand .brand-icon {
  width: 40px;
  height: 40px;
  font-size: 18px;
}

.footer-desc {
  color: var(--text-weak);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 0;
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-weak);
  font-size: 14px;
  transition: color 0.2s, padding-left 0.2s;
}

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

.footer-contact div {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-weak);
  font-size: 14px;
  margin-bottom: 12px;
}

.footer-contact i {
  color: var(--primary-light);
  width: 16px;
  text-align: center;
}

.footer-bottom {
  border-top: 1px solid var(--border-main);
  padding: 20px 0;
  margin-top: 40px;
  text-align: center;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.35);
  font-size: 13px;
  margin: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 1199.98px) {
  .page-banner h1 {
    font-size: 38px;
  }
}

@media (max-width: 991.98px) {
  :root {
    --spacing-section: 56px;
  }

  .site-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  }

  .site-sidebar.open {
    transform: translateX(0);
  }

  .sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1040;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
  }

  .sidebar-backdrop.show {
    opacity: 1;
    pointer-events: auto;
  }

  .mobile-header {
    display: block;
  }

  .site-footer {
    margin-top: 0;
  }
}

@media (max-width: 767.98px) {
  .container-custom {
    padding: 0 20px;
  }

  .page-banner {
    padding: 60px 0 50px;
  }

  .page-banner h1 {
    font-size: 30px;
  }

  .page-banner .banner-desc {
    font-size: 15px;
  }

  .section-head h2 {
    font-size: 26px;
  }

  .feature-content {
    padding: 32px 24px;
  }

  .cta-block {
    padding: 40px 24px;
  }

  .cta-block h2 {
    font-size: 24px;
  }

  .rank-list {
    padding: 16px;
  }
}

@media (max-width: 520px) {
  .container-custom {
    padding: 0 16px;
  }

  .page-banner h1 {
    font-size: 26px;
  }

  .banner-badge {
    font-size: 12px;
  }

  .filter-chips {
    gap: 8px;
  }

  .filter-chip {
    padding: 7px 16px;
    font-size: 13px;
  }

  .section-head {
    margin-bottom: 24px;
  }

  .section-head h2 {
    font-size: 23px;
  }

  .card-body-content h3 {
    font-size: 16px;
  }

  .feature-content h2 {
    font-size: 22px;
  }

  .rank-info .rank-title {
    white-space: normal;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
  }

  .rank-heat {
    display: none;
  }

  .timeline-item .timeline-title {
    font-size: 15px;
  }
}

@media (min-width: 992px) {
  .site-sidebar {
    transform: none !important;
  }
}

/* roulang page: category3 */
:root {
  --primary: #6d28d9;
  --primary-hover: #5b21b6;
  --primary-light: #8b5cf6;
  --accent: #06b6d4;
  --accent-hover: #0891b2;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --dark-3: #334155;
  --bg: #f1f5f9;
  --card-bg: #ffffff;
  --text: #1e293b;
  --text-weak: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow: 0 4px 20px rgba(0, 0, 0, .06);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, .1);
  --shadow-primary: 0 8px 30px rgba(109, 40, 217, .25);
  --transition: all .3s ease;
  --sidebar-w: 280px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif; background: var(--bg); color: var(--text); line-height: 1.7; overflow-x: hidden; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; display: block; }
button { border: none; outline: none; cursor: pointer; font-family: inherit; }
ul, ol { list-style: none; }
.container-custom { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 32px; }
.badge-tag { display: inline-block; padding: 4px 14px; font-size: 12px; font-weight: 600; border-radius: 50px; background: rgba(109, 40, 217, .1); color: var(--primary); letter-spacing: .5px; }
.badge-tag.accent { background: rgba(6, 182, 212, .12); color: var(--accent); }

/* ===== Sidebar ===== */
.sidebar { position: fixed; left: 0; top: 0; bottom: 0; width: var(--sidebar-w); background: var(--dark); z-index: 1100; display: flex; flex-direction: column; padding: 32px 24px; border-right: 1px solid rgba(255, 255, 255, .06); }
.sidebar-brand { display: flex; align-items: center; gap: 12px; padding-bottom: 30px; border-bottom: 1px solid rgba(255, 255, 255, .08); }
.brand-icon { width: 42px; height: 42px; border-radius: 12px; background: linear-gradient(135deg, var(--primary), var(--accent)); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 18px; flex-shrink: 0; box-shadow: 0 4px 15px rgba(109, 40, 217, .4); }
.sidebar-brand span { color: #fff; font-size: 17px; font-weight: 700; letter-spacing: .3px; line-height: 1.3; }
.nav-section-title { font-size: 11px; text-transform: uppercase; letter-spacing: 2px; color: rgba(255, 255, 255, .4); margin: 28px 0 12px; padding-left: 6px; font-weight: 700; }
.sidebar-nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.nav-link { display: flex; align-items: center; gap: 14px; padding: 12px 14px; border-radius: 12px; color: rgba(255, 255, 255, .65); font-size: 15px; font-weight: 500; transition: var(--transition); }
.nav-link i { width: 22px; text-align: center; font-size: 16px; }
.nav-link:hover { background: rgba(255, 255, 255, .06); color: #fff; }
.nav-link.active { background: linear-gradient(135deg, rgba(109, 40, 217, .4), rgba(6, 182, 212, .2)); color: #fff; box-shadow: 0 4px 20px rgba(109, 40, 217, .2); }
.sidebar-footer { padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, .08); }
.sidebar-footer p { font-size: 12px; color: rgba(255, 255, 255, .35); text-align: center; }
.main-content { margin-left: var(--sidebar-w); min-height: 100vh; display: flex; flex-direction: column; }

/* ===== Banner ===== */
.page-banner { position: relative; padding: 100px 0 90px; background: linear-gradient(135deg, rgba(15, 23, 42, .92), rgba(30, 41, 59, .85)), url('/assets/images/backpic/back-1.png') center/cover no-repeat; color: #fff; overflow: hidden; }
.page-banner::after { content: ''; position: absolute; right: -120px; top: -120px; width: 400px; height: 400px; background: radial-gradient(circle, rgba(109, 40, 217, .4), transparent 70%); border-radius: 50%; pointer-events: none; }
.page-banner .container-custom { position: relative; z-index: 2; }
.banner-tag { display: inline-flex; align-items: center; gap: 8px; background: rgba(255, 255, 255, .12); backdrop-filter: blur(8px); padding: 6px 18px; border-radius: 50px; font-size: 13px; font-weight: 600; color: #e9d5ff; margin-bottom: 24px; border: 1px solid rgba(255, 255, 255, .1); }
.banner-tag i { font-size: 14px; }
.page-banner h1 { font-size: 44px; font-weight: 800; line-height: 1.25; margin-bottom: 18px; letter-spacing: .5px; }
.page-banner h1 span { background: linear-gradient(90deg, #c4b5fd, #67e8f9); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.page-banner p { font-size: 17px; color: rgba(255, 255, 255, .8); max-width: 560px; margin-bottom: 36px; line-height: 1.8; }
.banner-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 13px 30px; border-radius: 50px; font-weight: 600; font-size: 15px; letter-spacing: .3px; transition: var(--transition); }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: #fff; box-shadow: var(--shadow-primary); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 36px rgba(109, 40, 217, .35); }
.btn-outline-light { border: 1px solid rgba(255, 255, 255, .3); color: #fff; background: rgba(255, 255, 255, .05); }
.btn-outline-light:hover { background: rgba(255, 255, 255, .15); border-color: rgba(255, 255, 255, .5); transform: translateY(-3px); }

/* ===== Section spacing ===== */
.section-block { padding: 80px 0; }
.section-block.alt { background: #fff; }
.section-head { max-width: 640px; margin-bottom: 50px; }
.section-head .section-sub { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 2px; color: var(--primary); text-transform: uppercase; margin-bottom: 8px; }
.section-head h2 { font-size: 32px; font-weight: 800; line-height: 1.35; color: var(--dark); margin-bottom: 12px; }
.section-head p { font-size: 15px; color: var(--text-weak); line-height: 1.7; }
.section-head.center { text-align: center; margin-left: auto; margin-right: auto; }
.divider { width: 56px; height: 4px; border-radius: 4px; background: linear-gradient(90deg, var(--primary), var(--accent)); margin: 20px 0; }
.section-head.center .divider { margin-left: auto; margin-right: auto; }

/* ===== Feature modules ===== */
.module-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; }
.module-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px 24px; text-align: center; transition: var(--transition); position: relative; overflow: hidden; }
.module-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--primary), var(--accent)); opacity: 0; transition: var(--transition); }
.module-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.module-card:hover::before { opacity: 1; }
.module-icon { width: 64px; height: 64px; margin: 0 auto 20px; border-radius: 18px; display: flex; align-items: center; justify-content: center; font-size: 24px; background: linear-gradient(135deg, rgba(109, 40, 217, .12), rgba(6, 182, 212, .12)); color: var(--primary); }
.module-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; color: var(--dark); }
.module-card p { font-size: 13px; color: var(--text-weak); line-height: 1.6; }

/* ===== Steps ===== */
.steps-wrapper { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; position: relative; }
.steps-wrapper::before { content: ''; position: absolute; top: 48px; left: 8%; right: 8%; height: 2px; background: linear-gradient(90deg, var(--primary), var(--accent)); opacity: .25; z-index: 0; }
.step-item { text-align: center; position: relative; z-index: 1; }
.step-number { width: 90px; height: 90px; border-radius: 50%; margin: 0 auto 24px; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; font-size: 30px; font-weight: 800; box-shadow: 0 10px 30px rgba(109, 40, 217, .3); border: 4px solid #fff; }
.step-item h3 { font-size: 18px; font-weight: 700; color: var(--dark); margin-bottom: 10px; }
.step-item p { font-size: 14px; color: var(--text-weak); max-width: 220px; margin: 0 auto; line-height: 1.65; }

/* ===== Guide cards ===== */
.guide-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.guide-card { background: var(--card-bg); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); transition: var(--transition); }
.guide-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.guide-media { position: relative; aspect-ratio: 16/10; overflow: hidden; }
.guide-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.guide-card:hover .guide-media img { transform: scale(1.05); }
.guide-media .guide-badge { position: absolute; top: 16px; left: 16px; background: rgba(15, 23, 42, .85); backdrop-filter: blur(6px); color: #fff; padding: 4px 14px; border-radius: 50px; font-size: 12px; font-weight: 600; }
.guide-body { padding: 24px 24px 28px; }
.guide-body h3 { font-size: 17px; font-weight: 700; color: var(--dark); line-height: 1.5; margin-bottom: 10px; }
.guide-body p { font-size: 14px; color: var(--text-weak); line-height: 1.65; margin-bottom: 16px; }
.guide-meta { display: flex; align-items: center; justify-content: space-between; font-size: 13px; color: var(--text-weak); }
.guide-meta i { margin-right: 4px; }
.guide-link { color: var(--primary); font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
.guide-link:hover { color: var(--primary-hover); gap: 10px; }

/* ===== Stats ===== */
.stats-section { background: linear-gradient(135deg, var(--dark), var(--dark-2)), url('/assets/images/backpic/back-2.png') center/cover no-repeat; background-blend-mode: overlay; padding: 80px 0; color: #fff; position: relative; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.stat-item { text-align: center; padding: 20px; }
.stat-number { font-size: 48px; font-weight: 800; background: linear-gradient(90deg, #c4b5fd, #67e8f9); -webkit-background-clip: text; -webkit-text-fill-color: transparent; line-height: 1.2; }
.stat-label { font-size: 15px; color: rgba(255, 255, 255, .6); margin-top: 8px; }

/* ===== FAQ ===== */
.faq-wrapper { max-width: 860px; margin: 0 auto; }
.faq-item { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 16px; overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: rgba(109, 40, 217, .2); }
.faq-question { width: 100%; padding: 22px 28px; background: none; display: flex; align-items: center; justify-content: space-between; gap: 16px; text-align: left; font-size: 16px; font-weight: 600; color: var(--dark); }
.faq-question .faq-icon { width: 32px; height: 32px; border-radius: 50%; background: rgba(109, 40, 217, .1); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 12px; flex-shrink: 0; transition: var(--transition); }
.faq-item.open .faq-icon { transform: rotate(180deg); background: var(--primary); color: #fff; }
.faq-answer { max-height: 0; overflow: hidden; padding: 0 28px; transition: max-height .35s ease, padding .35s ease; font-size: 15px; color: var(--text-weak); line-height: 1.8; }
.faq-item.open .faq-answer { max-height: 300px; padding: 0 28px 24px; }

/* ===== CTA ===== */
.cta-section { padding: 80px 0; position: relative; background: linear-gradient(135deg, rgba(109, 40, 217, .95), rgba(6, 182, 212, .9)), url('/assets/images/backpic/back-3.png') center/cover no-repeat; }
.cta-box { text-align: center; color: #fff; max-width: 680px; margin: 0 auto; }
.cta-box h2 { font-size: 34px; font-weight: 800; margin-bottom: 16px; }
.cta-box p { font-size: 16px; color: rgba(255, 255, 255, .85); margin-bottom: 32px; line-height: 1.7; }
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-white { background: #fff; color: var(--primary); border-radius: 50px; padding: 13px 32px; font-weight: 700; box-shadow: 0 8px 30px rgba(0, 0, 0, .15); }
.btn-white:hover { background: #f1f5f9; transform: translateY(-3px); box-shadow: 0 12px 40px rgba(0, 0, 0, .2); }
.btn-ghost-light { border: 1px solid rgba(255, 255, 255, .5); color: #fff; padding: 13px 32px; border-radius: 50px; font-weight: 600; }
.btn-ghost-light:hover { background: rgba(255, 255, 255, .15); transform: translateY(-3px); }

/* ===== Footer ===== */
.site-footer { background: var(--dark); color: rgba(255, 255, 255, .7); padding: 70px 0 30px; }
.site-footer .footer-brand { display: flex; align-items: center; gap: 12px; font-size: 20px; color: #fff; font-weight: 700; padding-bottom: 22px; }
.footer-desc { font-size: 14px; color: rgba(255, 255, 255, .5); line-height: 1.8; margin-top: 10px; }
.footer-title { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 22px; position: relative; padding-bottom: 10px; }
.footer-title::after { content: ''; position: absolute; left: 0; bottom: 0; width: 24px; height: 2px; background: var(--primary-light); border-radius: 2px; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { font-size: 14px; color: rgba(255, 255, 255, .6); transition: var(--transition); }
.footer-links a:hover { color: #fff; padding-left: 6px; }
.footer-contact div { display: flex; align-items: center; gap: 10px; font-size: 14px; color: rgba(255, 255, 255, .6); margin-bottom: 12px; }
.footer-contact i { color: var(--primary-light); width: 20px; text-align: center; }
.footer-bottom { margin-top: 50px; padding-top: 24px; border-top: 1px solid rgba(255, 255, 255, .08); text-align: center; }
.footer-bottom p { font-size: 13px; color: rgba(255, 255, 255, .35); }

/* ===== Mobile responsive ===== */
@media (max-width: 1199.98px) {
  .module-grid { grid-template-columns: repeat(3, 1fr); }
  .guide-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 991.98px) {
  .sidebar { position: sticky; top: 0; width: 100%; height: auto; flex-direction: row; flex-wrap: wrap; align-items: center; padding: 14px 20px; border-right: none; border-bottom: 1px solid rgba(255, 255, 255, .08); z-index: 1100; }
  .sidebar-brand { padding-bottom: 0; border-bottom: none; }
  .sidebar-brand span { font-size: 15px; }
  .nav-section-title { display: none; }
  .sidebar-nav { flex-direction: row; overflow-x: auto; gap: 6px; margin-left: 20px; flex: 1; flex-wrap: nowrap; scrollbar-width: none; }
  .sidebar-nav::-webkit-scrollbar { display: none; }
  .nav-link { padding: 8px 14px; font-size: 13px; white-space: nowrap; border-radius: 50px; }
  .sidebar-footer { display: none; }
  .main-content { margin-left: 0; }
  .page-banner { padding: 70px 0 60px; }
  .page-banner h1 { font-size: 34px; }
  .steps-wrapper { grid-template-columns: repeat(2, 1fr); gap: 40px 20px; }
  .steps-wrapper::before { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 767.98px) {
  .container-custom { padding: 0 20px; }
  .section-block { padding: 60px 0; }
  .section-head h2 { font-size: 26px; }
  .module-grid { grid-template-columns: repeat(2, 1fr); }
  .guide-grid { grid-template-columns: 1fr; }
  .page-banner h1 { font-size: 28px; }
  .page-banner p { font-size: 15px; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .stat-number { font-size: 36px; }
  .cta-box h2 { font-size: 26px; }
  .faq-question { font-size: 14px; padding: 18px 20px; }
  .faq-answer { padding: 0 20px; }
  .faq-item.open .faq-answer { padding: 0 20px 20px; }
}
@media (max-width: 575.98px) {
  .sidebar { padding: 12px 16px; }
  .sidebar-brand .brand-icon { width: 36px; height: 36px; font-size: 15px; }
  .sidebar-brand span { font-size: 13px; }
  .module-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .module-card { padding: 24px 16px; }
  .module-icon { width: 52px; height: 52px; font-size: 20px; }
  .steps-wrapper { grid-template-columns: 1fr; }
  .guide-grid { grid-template-columns: 1fr; }
  .banner-actions .btn { width: 100%; justify-content: center; }
  .cta-buttons .btn { width: 100%; justify-content: center; }
}