/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f1a2e;
            --primary-light: #1a2d4a;
            --primary-dark: #080e1a;
            --accent: #d4a04a;
            --accent-light: #e8c074;
            --accent-dark: #b8832a;
            --bg-body: #f4f6fa;
            --bg-card: #ffffff;
            --bg-dark: #0a1220;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8888aa;
            --text-light: #e8eaf0;
            --text-accent: #d4a04a;
            --border-color: #e2e6ef;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(15, 26, 46, 0.06);
            --shadow-md: 0 8px 30px rgba(15, 26, 46, 0.1);
            --shadow-lg: 0 20px 60px rgba(15, 26, 46, 0.15);
            --shadow-glow: 0 0 40px rgba(212, 160, 74, 0.15);
            --sidebar-width: 260px;
            --header-height: 0px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            overflow-x: hidden;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: var(--text-primary);
            font-weight: 700;
        }

        /* ===== App Shell ===== */
        .app-shell {
            display: flex;
            min-height: 100vh;
        }

        /* ===== Sidebar ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--primary);
            border-right: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s ease;
            box-shadow: 2px 0 30px rgba(0, 0, 0, 0.2);
            overflow-y: auto;
        }
        .sidebar-brand {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .sidebar-brand .brand-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .sidebar-brand .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            line-height: 1.2;
        }
        .sidebar-brand .brand-sub {
            font-size: 11px;
            color: var(--text-muted);
            letter-spacing: 2px;
            text-transform: uppercase;
            display: block;
            margin-top: 2px;
        }
        .sidebar-nav {
            padding: 16px 12px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav .nav-label {
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: rgba(255, 255, 255, 0.25);
            padding: 16px 12px 8px;
            font-weight: 600;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.65);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: rgba(255, 255, 255, 0.35);
            transition: var(--transition);
        }
        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
        }
        .sidebar-nav a:hover i {
            color: var(--accent);
        }
        .sidebar-nav a.active {
            background: rgba(212, 160, 74, 0.12);
            color: var(--accent);
        }
        .sidebar-nav a.active i {
            color: var(--accent);
        }
        .sidebar-nav a.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 24px;
            background: var(--accent);
            border-radius: 0 3px 3px 0;
        }
        .sidebar-footer {
            padding: 16px 12px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            text-align: center;
        }
        .sidebar-footer .social-links {
            display: flex;
            justify-content: center;
            gap: 12px;
            margin-bottom: 12px;
        }
        .sidebar-footer .social-links a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.4);
            font-size: 14px;
            transition: var(--transition);
        }
        .sidebar-footer .social-links a:hover {
            background: rgba(212, 160, 74, 0.2);
            color: var(--accent);
        }
        .sidebar-footer .copy {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.2);
            letter-spacing: 0.5px;
        }

        /* ===== Main Content ===== */
        .main-content {
            flex: 1;
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            background: var(--bg-body);
            position: relative;
            z-index: 1;
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 999;
            background: var(--primary);
            padding: 12px 20px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
        }
        .mobile-header .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
        }
        .mobile-header .menu-toggle {
            width: 40px;
            height: 40px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .mobile-header .menu-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition);
        }
        .mobile-header .menu-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .mobile-header .menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-header .menu-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Overlay ===== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
            backdrop-filter: blur(4px);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .sidebar-overlay.active {
            opacity: 1;
        }

        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ===== Hero Section ===== */
        .hero {
            position: relative;
            padding: 120px 0 100px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(212, 160, 74, 0.08) 0%, transparent 70%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-content {
            max-width: 720px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 50px;
            background: rgba(212, 160, 74, 0.12);
            border: 1px solid rgba(212, 160, 74, 0.2);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 24px;
            letter-spacing: 0.5px;
        }
        .hero-badge i {
            font-size: 12px;
        }
        .hero h1 {
            font-size: 52px;
            font-weight: 800;
            color: #fff;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero h1 span {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.8;
            margin-bottom: 36px;
            max-width: 580px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.25);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.4);
            color: #fff;
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 36px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stats .stat-item {
            text-align: left;
        }
        .hero-stats .stat-number {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            line-height: 1;
        }
        .hero-stats .stat-number span {
            color: var(--accent);
        }
        .hero-stats .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 6px;
        }

        /* ===== Section通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }
        .section-header h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.8;
        }
        .section.bg-dark {
            background: var(--bg-dark);
        }
        .section.bg-dark .section-header h2 {
            color: #fff;
        }
        .section.bg-dark .section-header p {
            color: rgba(255, 255, 255, 0.6);
        }
        .section.bg-light {
            background: #fff;
        }

        /* ===== Features / 核心说明 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            padding: 36px 28px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(212, 160, 74, 0.2);
        }
        .feature-card .icon-box {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: rgba(212, 160, 74, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--accent);
            margin-bottom: 20px;
            transition: var(--transition);
        }
        .feature-card:hover .icon-box {
            background: var(--accent);
            color: #fff;
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .feature-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== Category Cards / 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .category-card .card-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .category-card .card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 26, 46, 0.6) 0%, transparent 60%);
        }
        .category-card .card-body {
            padding: 24px 28px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card .card-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 50px;
            background: rgba(212, 160, 74, 0.1);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .category-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .category-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .category-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 14px;
            color: var(--accent);
        }
        .category-card .card-link i {
            transition: var(--transition);
        }
        .category-card .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== Data / 数据板块 ===== */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .data-item {
            text-align: center;
            padding: 36px 20px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .data-item:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(212, 160, 74, 0.15);
        }
        .data-item .data-number {
            font-size: 44px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
            margin-bottom: 8px;
        }
        .data-item .data-number .suffix {
            font-size: 20px;
            color: rgba(212, 160, 74, 0.6);
        }
        .data-item .data-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.6);
            font-weight: 500;
        }

        /* ===== Content List / 资讯列表 ===== */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .content-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .content-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .content-card .card-img {
            height: 180px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .content-card .card-img .cate-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 4px 14px;
            border-radius: 50px;
            background: rgba(15, 26, 46, 0.75);
            backdrop-filter: blur(8px);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
        }
        .content-card .card-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .content-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .content-card .card-meta i {
            font-size: 12px;
        }
        .content-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }
        .content-card .read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            margin-top: auto;
        }
        .content-card .read-more i {
            transition: var(--transition);
        }
        .content-card .read-more:hover i {
            transform: translateX(4px);
        }
        .empty-list {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            font-size: 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
        }
        .empty-list i {
            font-size: 40px;
            display: block;
            margin-bottom: 16px;
            color: var(--border-color);
        }

        /* ===== Features Alt / 特色功能图文 ===== */
        .feature-alt {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .feature-alt .alt-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .feature-alt .alt-image img {
            width: 100%;
            height: 380px;
            object-fit: cover;
        }
        .feature-alt .alt-image::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.06);
            pointer-events: none;
        }
        .feature-alt .alt-text h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 16px;
            color: #fff;
            letter-spacing: -0.3px;
        }
        .feature-alt .alt-text p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .feature-alt .alt-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .feature-alt .alt-list li {
            display: flex;
            align-items: center;
            gap: 12px;
            color: rgba(255, 255, 255, 0.75);
            font-size: 15px;
        }
        .feature-alt .alt-list li i {
            color: var(--accent);
            font-size: 14px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(212, 160, 74, 0.15);
        }
        .faq-item .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            background: none;
            transition: var(--transition);
        }
        .faq-item .faq-question:hover {
            color: var(--accent);
        }
        .faq-item .faq-question i {
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
        }
        .faq-item .faq-answer p {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 38px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.6);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-section .btn {
            font-size: 18px;
            padding: 16px 40px;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            padding: 48px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.4);
            line-height: 1.8;
            max-width: 320px;
        }
        .footer h4 {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer ul li {
            margin-bottom: 10px;
        }
        .footer ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.45);
            transition: var(--transition);
        }
        .footer ul a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.3);
        }
        .footer-bottom .footer-links {
            display: flex;
            gap: 20px;
        }
        .footer-bottom .footer-links a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.3);
        }
        .footer-bottom .footer-links a:hover {
            color: var(--accent);
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: var(--shadow-md);
            z-index: 100;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: var(--transition);
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--accent-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .container {
                padding: 0 24px;
            }
            .hero h1 {
                font-size: 40px;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .content-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-alt {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .feature-alt .alt-image img {
                height: 300px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 280px;
            }
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
                box-shadow: 4px 0 60px rgba(0, 0, 0, 0.4);
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
            }
            .hero {
                padding: 80px 0 60px;
                min-height: auto;
            }
            .hero h1 {
                font-size: 32px;
            }
            .hero p {
                font-size: 16px;
            }
            .hero-stats {
                flex-wrap: wrap;
                gap: 24px;
            }
            .hero-stats .stat-number {
                font-size: 26px;
            }
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 28px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .content-grid {
                grid-template-columns: 1fr;
            }
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .data-item {
                padding: 24px 16px;
            }
            .data-item .data-number {
                font-size: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 28px;
            }
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 16px;
            }
            .sidebar-overlay.active {
                display: block;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero h1 {
                font-size: 26px;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .data-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .data-item .data-number {
                font-size: 28px;
            }
            .category-card .card-body {
                padding: 18px 20px 22px;
            }
            .content-card .card-body {
                padding: 16px 18px 20px;
            }
            .faq-item .faq-question {
                padding: 14px 18px;
                font-size: 15px;
            }
            .faq-item .faq-answer p {
                padding: 0 18px 16px;
            }
        }

        /* ===== Scrollbar ===== */
        .sidebar::-webkit-scrollbar {
            width: 4px;
        }
        .sidebar::-webkit-scrollbar-track {
            background: transparent;
        }
        .sidebar::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.1);
            border-radius: 4px;
        }
        .sidebar::-webkit-scrollbar-thumb:hover {
            background: rgba(255, 255, 255, 0.2);
        }

/* roulang page: article */
:root {
    --primary: #0f1b33;
    --primary-light: #1a2d4a;
    --primary-lighter: #2a4060;
    --accent: #d4a853;
    --accent-light: #f0d080;
    --accent-dark: #b8923a;
    --bg: #f5f7fa;
    --card-bg: #ffffff;
    --text: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-light: #8a8aa0;
    --text-white: #f0f2f5;
    --border: #e5e7eb;
    --border-light: #f0f2f5;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --transition: 0.3s ease;
    --sidebar-width: 260px;
    --header-height: 0px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    display: flex;
    min-height: 100vh;
}
a { color: var(--accent-dark); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: none; background: none; }
.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--primary);
    color: var(--text-white);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    overflow-y: auto;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.sidebar-brand {
    padding: 32px 24px 24px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-brand .brand-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.sidebar-brand .brand-text i { font-size: 24px; color: var(--accent-light); }
.sidebar-brand .brand-sub {
    font-size: 13px;
    color: rgba(255,255,255,0.5);
    margin-top: 6px;
    padding-left: 34px;
}
.sidebar-nav {
    padding: 16px 16px 24px;
    flex: 1;
}
.sidebar-nav .nav-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: rgba(255,255,255,0.3);
    padding: 12px 12px 8px;
    font-weight: 600;
}
.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    color: rgba(255,255,255,0.7);
    font-size: 15px;
    font-weight: 500;
    transition: all var(--transition);
    margin-bottom: 2px;
}
.sidebar-nav a i { width: 20px; text-align: center; font-size: 16px; color: rgba(255,255,255,0.4); transition: color var(--transition); }
.sidebar-nav a:hover { background: rgba(255,255,255,0.08); color: var(--text-white); }
.sidebar-nav a:hover i { color: var(--accent-light); }
.sidebar-nav a.active { background: rgba(212,168,83,0.15); color: var(--accent); }
.sidebar-nav a.active i { color: var(--accent); }
.sidebar-footer {
    padding: 16px 24px 24px;
    border-top: 1px solid rgba(255,255,255,0.06);
    font-size: 12px;
    color: rgba(255,255,255,0.3);
    text-align: center;
}
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
.mobile-toggle { display: none; }
.mobile-overlay { display: none; }

/* Article Hero */
.article-hero {
    position: relative;
    padding: 60px 0 40px;
    background: var(--primary);
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    color: var(--text-white);
    min-height: 260px;
    display: flex;
    align-items: center;
}
.article-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15,27,51,0.85) 0%, rgba(15,27,51,0.6) 100%);
    z-index: 1;
}
.article-hero .container { position: relative; z-index: 2; }
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.breadcrumb a { color: rgba(255,255,255,0.7); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb i { font-size: 12px; color: rgba(255,255,255,0.3); }
.breadcrumb .current { color: var(--accent); }
.article-category-badge {
    display: inline-block;
    background: var(--accent);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    padding: 4px 16px;
    border-radius: 20px;
    margin-bottom: 12px;
    letter-spacing: 0.3px;
}
.article-hero h1 {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-white);
    max-width: 800px;
    margin-bottom: 12px;
}
.article-meta {
    display: flex;
    align-items: center;
    gap: 20px;
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    flex-wrap: wrap;
}
.article-meta i { margin-right: 6px; font-size: 13px; }

/* Article Body */
.article-body-section {
    padding: 40px 0 60px;
    flex: 1;
}
.article-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 40px;
    align-items: start;
}
.article-content { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); padding: 40px 48px; }
.article-content .content-body { font-size: 16px; line-height: 1.9; color: var(--text-secondary); }
.article-content .content-body p { margin-bottom: 1.2em; }
.article-content .content-body h2 { font-size: 24px; font-weight: 700; color: var(--text); margin: 1.6em 0 0.6em; }
.article-content .content-body h3 { font-size: 20px; font-weight: 600; color: var(--text); margin: 1.4em 0 0.5em; }
.article-content .content-body ul, .article-content .content-body ol { margin: 0 0 1.2em 1.5em; list-style: disc; }
.article-content .content-body ol { list-style: decimal; }
.article-content .content-body li { margin-bottom: 0.4em; }
.article-content .content-body blockquote { border-left: 4px solid var(--accent); background: var(--bg); padding: 16px 24px; margin: 1.2em 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-secondary); font-style: italic; }
.article-content .content-body img { border-radius: var(--radius-sm); margin: 1.2em 0; box-shadow: var(--shadow-sm); }
.article-content .content-body a { color: var(--accent-dark); text-decoration: underline; text-underline-offset: 2px; }
.article-content .content-body a:hover { color: var(--accent); }
.article-content .content-body code { background: var(--bg); padding: 2px 8px; border-radius: 4px; font-size: 14px; color: var(--primary-light); }
.article-content .content-body pre { background: var(--primary); color: var(--text-white); padding: 20px 24px; border-radius: var(--radius-sm); overflow-x: auto; margin: 1.2em 0; font-size: 14px; line-height: 1.6; }

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.article-tags .tag {
    display: inline-block;
    background: var(--bg);
    color: var(--text-secondary);
    font-size: 13px;
    padding: 6px 16px;
    border-radius: 20px;
    transition: all var(--transition);
    border: 1px solid var(--border);
}
.article-tags .tag:hover { background: var(--accent); color: var(--primary); border-color: var(--accent); }

.article-share {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-light);
}
.article-share span { font-size: 14px; color: var(--text-light); font-weight: 500; }
.article-share a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg);
    color: var(--text-secondary);
    font-size: 16px;
    transition: all var(--transition);
    border: 1px solid var(--border);
}
.article-share a:hover { background: var(--accent); color: var(--primary); border-color: var(--accent); transform: translateY(-2px); }

/* Sidebar Panel */
.article-sidebar { display: flex; flex-direction: column; gap: 24px; }
.sidebar-widget {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
}
.sidebar-widget h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--accent);
    display: flex;
    align-items: center;
    gap: 8px;
}
.sidebar-widget h3 i { color: var(--accent); }
.sidebar-widget ul li { margin-bottom: 10px; }
.sidebar-widget ul li a {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.sidebar-widget ul li a:hover { background: var(--bg); color: var(--accent-dark); padding-left: 16px; }
.sidebar-widget ul li a i { font-size: 12px; color: var(--accent); width: 16px; text-align: center; }
.sidebar-widget .cover-mini { margin-top: 12px; border-radius: var(--radius-sm); overflow: hidden; box-shadow: var(--shadow-sm); }

/* Article Navigation */
.article-nav-section {
    padding: 0 0 60px;
}
.article-nav-links {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}
.article-nav-links a {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background: var(--card-bg);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    transition: all var(--transition);
    border: 1px solid var(--border);
}
.article-nav-links a:hover { box-shadow: var(--shadow); color: var(--accent-dark); border-color: var(--accent); transform: translateY(-2px); }
.article-nav-links a i { color: var(--accent); }

/* Related Section */
.related-section {
    padding: 60px 0;
    background: var(--card-bg);
}
.related-section .section-title {
    font-size: 26px;
    font-weight: 700;
    color: var(--text);
    text-align: center;
    margin-bottom: 12px;
}
.related-section .section-sub { text-align: center; color: var(--text-light); margin-bottom: 36px; font-size: 15px; }
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.related-card {
    background: var(--bg);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all var(--transition);
    border: 1px solid var(--border);
}
.related-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: var(--accent); }
.related-card img { width: 100%; height: 180px; object-fit: cover; border-radius: 0; }
.related-card .card-body { padding: 20px; }
.related-card .card-body h4 { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 8px; line-height: 1.4; }
.related-card .card-body p { font-size: 14px; color: var(--text-light); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* CTA */
.cta-section {
    padding: 60px 0;
    background: var(--primary);
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    position: relative;
}
.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15,27,51,0.88) 0%, rgba(15,27,51,0.72) 100%);
    z-index: 1;
}
.cta-section .container { position: relative; z-index: 2; text-align: center; }
.cta-section h2 { font-size: 30px; font-weight: 700; color: var(--text-white); margin-bottom: 12px; }
.cta-section p { font-size: 16px; color: rgba(255,255,255,0.7); max-width: 560px; margin: 0 auto 28px; }
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    transition: all var(--transition);
    border: none;
    cursor: pointer;
}
.btn-primary { background: var(--accent); color: var(--primary); }
.btn-primary:hover { background: var(--accent-light); color: var(--primary); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(212,168,83,0.3); }
.btn-outline { background: transparent; color: var(--text-white); border: 2px solid rgba(255,255,255,0.3); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn-sm { padding: 10px 20px; font-size: 14px; }

/* Footer */
.footer {
    background: var(--primary);
    color: rgba(255,255,255,0.7);
    padding: 48px 0 32px;
    border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 32px;
}
.footer-brand .brand-text { font-size: 20px; font-weight: 700; color: var(--accent); margin-bottom: 10px; }
.footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 360px; }
.footer h4 { font-size: 15px; font-weight: 600; color: var(--text-white); margin-bottom: 16px; }
.footer ul li { margin-bottom: 10px; }
.footer ul li a { font-size: 14px; color: rgba(255,255,255,0.55); transition: all var(--transition); display: inline-flex; align-items: center; gap: 8px; }
.footer ul li a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { font-size: 13px; color: rgba(255,255,255,0.4); }
.footer-links a:hover { color: var(--accent); }

/* Error State */
.error-state {
    text-align: center;
    padding: 60px 24px;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.error-state i { font-size: 56px; color: var(--text-light); margin-bottom: 20px; }
.error-state h2 { font-size: 24px; color: var(--text); margin-bottom: 12px; }
.error-state p { color: var(--text-light); margin-bottom: 24px; }

/* Not Found */
.not-found-page { padding: 80px 0; text-align: center; }

/* Mobile */
@media (max-width: 1024px) {
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
    .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .mobile-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        position: fixed;
        top: 16px;
        left: 16px;
        width: 44px;
        height: 44px;
        background: var(--primary);
        color: var(--text-white);
        border-radius: 50%;
        z-index: 1100;
        font-size: 20px;
        box-shadow: var(--shadow-lg);
        border: none;
        cursor: pointer;
        transition: all var(--transition);
    }
    .mobile-toggle:hover { background: var(--primary-light); }
    .mobile-overlay {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.5);
        z-index: 999;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.4s ease;
    }
    .mobile-overlay.open { opacity: 1; pointer-events: auto; }
    .sidebar-footer { display: none; }
    .article-hero { padding: 80px 0 32px; min-height: 200px; }
    .article-hero h1 { font-size: 24px; }
    .article-content { padding: 24px 20px; }
    .article-content .content-body { font-size: 15px; }
    .article-sidebar { grid-template-columns: 1fr; }
    .related-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .cta-section h2 { font-size: 24px; }
    .article-nav-links { flex-direction: column; align-items: stretch; }
    .article-nav-links a { justify-content: center; }
}
@media (max-width: 520px) {
    .container { padding: 0 16px; }
    .article-hero h1 { font-size: 20px; }
    .article-meta { gap: 12px; font-size: 13px; flex-wrap: wrap; }
    .article-content { padding: 20px 16px; }
    .article-content .content-body { font-size: 14px; line-height: 1.8; }
    .breadcrumb { font-size: 12px; }
    .sidebar { width: 100%; max-width: 300px; }
    .btn { padding: 12px 24px; font-size: 14px; }
    .related-section .section-title { font-size: 20px; }
}

/* roulang page: category1 */
/* ===== Design Tokens ===== */
        :root {
            --color-primary: #0f1b2d;
            --color-primary-light: #1a2a4a;
            --color-primary-lighter: #2a3f6a;
            --color-accent: #e8a830;
            --color-accent-light: #f0c860;
            --color-accent-dark: #c48a20;
            --color-bg: #f5f7fa;
            --color-bg-white: #ffffff;
            --color-bg-alt: #eef1f6;
            --color-text: #1a1a2e;
            --color-text-light: #5a6a7e;
            --color-text-lighter: #8a9aae;
            --color-border: #dce0e8;
            --color-border-light: #e8ecf0;
            --color-success: #3a9a5a;
            --color-shadow: rgba(15, 27, 45, 0.08);
            --color-shadow-hover: rgba(15, 27, 45, 0.16);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px var(--color-shadow);
            --shadow-md: 0 6px 24px var(--color-shadow);
            --shadow-lg: 0 12px 40px var(--color-shadow-hover);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --sidebar-width: 260px;
            --header-height: 0px;
            --max-width: 1200px;
            --gap-section: 80px;
            --gap-card: 28px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            display: flex;
            min-height: 100vh;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
        }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== App Shell ===== */
        .app-shell {
            display: flex;
            width: 100%;
            min-height: 100vh;
        }

        /* ===== Sidebar ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--color-bg-white);
            border-right: 1px solid var(--color-border);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition);
            overflow-y: auto;
            padding: 0;
        }
        .sidebar-header {
            padding: 28px 24px 16px;
            border-bottom: 1px solid var(--color-border-light);
        }
        .sidebar-header .brand-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: 0.5px;
        }
        .sidebar-header .brand-text span {
            color: var(--color-accent);
        }
        .sidebar-nav {
            padding: 16px 12px;
            flex: 1;
        }
        .sidebar-nav .nav-label {
            font-size: 12px;
            font-weight: 600;
            color: var(--color-text-lighter);
            text-transform: uppercase;
            letter-spacing: 1.2px;
            padding: 8px 12px 12px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            color: var(--color-text-light);
            font-weight: 500;
            font-size: 15px;
            transition: all var(--transition);
            margin-bottom: 2px;
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: var(--color-text-lighter);
            transition: color var(--transition);
        }
        .sidebar-nav a:hover {
            background: var(--color-bg-alt);
            color: var(--color-primary);
        }
        .sidebar-nav a:hover i {
            color: var(--color-accent);
        }
        .sidebar-nav a.active {
            background: var(--color-primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-nav a.active i {
            color: var(--color-accent-light);
        }
        .sidebar-nav a.active:hover {
            background: var(--color-primary-light);
        }
        .sidebar-footer {
            padding: 16px 24px 24px;
            border-top: 1px solid var(--color-border-light);
            font-size: 13px;
            color: var(--color-text-lighter);
            text-align: center;
        }

        /* ===== Main Content ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            background: var(--color-bg);
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--color-bg-white);
            border-bottom: 1px solid var(--color-border);
            z-index: 999;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
        }
        .mobile-header .brand-text {
            font-size: 18px;
            font-weight: 800;
            color: var(--color-primary);
        }
        .mobile-header .brand-text span {
            color: var(--color-accent);
        }
        .menu-toggle {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            color: var(--color-text);
            font-size: 20px;
            background: var(--color-bg-alt);
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: var(--color-border);
        }
        .menu-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition);
        }
        .menu-overlay.open {
            display: block;
            opacity: 1;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 100px 0 90px;
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 60%, var(--color-primary-lighter) 100%);
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(232, 168, 48, 0.10) 0%, transparent 70%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.10);
            backdrop-filter: blur(8px);
            padding: 8px 18px;
            border-radius: 100px;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-accent-light);
            margin-bottom: 24px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-badge i {
            font-size: 14px;
        }
        .hero h1 {
            font-size: 48px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 20px;
            max-width: 720px;
            letter-spacing: -0.5px;
            line-height: 1.2;
        }
        .hero h1 span {
            color: var(--color-accent);
        }
        .hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.80);
            max-width: 600px;
            line-height: 1.7;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--color-accent);
            color: var(--color-primary);
            border-color: var(--color-accent);
        }
        .btn-primary:hover {
            background: var(--color-accent-dark);
            border-color: var(--color-accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 168, 48, 0.30);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.35);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.60);
            transform: translateY(-2px);
        }
        .btn-outline-light:active {
            transform: translateY(0);
        }
        .btn:focus-visible {
            outline: 3px solid var(--color-accent-light);
            outline-offset: 3px;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--color-bg-alt);
        }
        .section-white {
            background: var(--color-bg-white);
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--color-text);
        }
        .section-header h2 i {
            color: var(--color-accent);
            margin-right: 8px;
        }
        .section-header p {
            font-size: 17px;
            color: var(--color-text-light);
            max-width: 580px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-header .overline {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 10px;
            display: block;
        }

        /* ===== Cards Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap-card);
        }
        .card {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--color-border-light);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 24px 26px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--color-text);
        }
        .card-body h3 i {
            color: var(--color-accent);
            margin-right: 6px;
            font-size: 17px;
        }
        .card-body p {
            font-size: 15px;
            color: var(--color-text-light);
            line-height: 1.7;
            flex: 1;
        }
        .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: var(--color-bg-alt);
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 12px;
            font-weight: 500;
            color: var(--color-text-light);
            margin-top: 14px;
            align-self: flex-start;
        }
        .card-tag i {
            font-size: 11px;
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step;
        }
        .step-item {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            padding: 32px 28px 36px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            text-align: center;
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            margin: 0 auto 18px;
            transition: background var(--transition);
        }
        .step-item:hover .step-number {
            background: var(--color-accent);
            color: var(--color-primary);
        }
        .step-item h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--color-text-light);
            line-height: 1.7;
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .stat-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .stat-icon {
            font-size: 32px;
            color: var(--color-accent);
            margin-bottom: 12px;
        }
        .stat-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-number span {
            font-size: 20px;
            font-weight: 600;
            color: var(--color-text-lighter);
        }
        .stat-label {
            font-size: 14px;
            color: var(--color-text-light);
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--color-bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--color-border);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 26px;
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            color: var(--color-text);
            background: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            background: var(--color-bg-alt);
        }
        .faq-question i {
            color: var(--color-accent);
            font-size: 14px;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 26px;
            color: var(--color-text-light);
            font-size: 15px;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 26px 22px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-lighter) 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.10;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.80);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-cta {
            background: var(--color-accent);
            color: var(--color-primary);
            padding: 16px 40px;
            border-radius: 100px;
            font-weight: 700;
            font-size: 16px;
            border: 2px solid var(--color-accent);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-cta:hover {
            background: var(--color-accent-dark);
            border-color: var(--color-accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(232, 168, 48, 0.30);
        }
        .btn-cta-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.35);
            padding: 16px 40px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 16px;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-cta-outline:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.60);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.80);
            padding: 60px 0 32px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .brand-text {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.60);
            max-width: 360px;
        }
        .footer h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer ul li {
            margin-bottom: 10px;
        }
        .footer ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.60);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: color var(--transition);
        }
        .footer ul li a:hover {
            color: var(--color-accent-light);
        }
        .footer ul li a i {
            font-size: 14px;
            color: var(--color-accent);
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding-top: 28px;
            gap: 16px;
        }
        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.50);
        }
        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .footer-links a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.50);
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: var(--color-accent-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero h1 {
                font-size: 38px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
                --gap-section: 56px;
            }
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
                box-shadow: 4px 0 32px rgba(0, 0, 0, 0.15);
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 60px;
            }
            .hero {
                padding: 60px 0 60px;
                min-height: auto;
            }
            .hero h1 {
                font-size: 30px;
            }
            .hero p {
                font-size: 16px;
            }
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-section p {
                font-size: 16px;
            }
            .stat-number {
                font-size: 28px;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .cta-actions {
                flex-direction: column;
                width: 100%;
            }
            .cta-actions .btn-cta,
            .cta-actions .btn-cta-outline {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero h1 {
                font-size: 24px;
            }
            .hero p {
                font-size: 15px;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .card-body {
                padding: 18px 20px 22px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 18px;
                font-size: 14px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 18px;
            }
            .step-item {
                padding: 24px 20px 28px;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-up {
            animation: fadeUp 0.6s ease both;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }