/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --secondary: #f59e0b;
            --secondary-dark: #d97706;
            --accent: #10b981;
            --dark: #0f172a;
            --dark-2: #1e293b;
            --gray-900: #1e293b;
            --gray-700: #334155;
            --gray-500: #64748b;
            --gray-300: #cbd5e1;
            --gray-100: #f1f5f9;
            --white: #ffffff;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --border: #e2e8f0;
            --border-radius: 12px;
            --border-radius-sm: 8px;
            --border-radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 24px 60px rgba(0,0,0,0.16);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
            --topbar-height: 40px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 40px;
            --spacing-2xl: 64px;
            --spacing-3xl: 96px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--gray-700);
            background: var(--bg-body);
            overflow-x: hidden;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea, select { font-family: inherit; font-size: inherit; outline: none; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--dark); font-weight: 700; line-height: 1.3; }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2.2rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1rem; }
        p:last-child { margin-bottom: 0; }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }
        @media (max-width: 768px) {
            .container { padding: 0 var(--spacing-md); }
        }

        /* ===== 顶部信息条 ===== */
        .topbar {
            background: var(--dark);
            color: var(--gray-300);
            font-size: 0.8rem;
            height: var(--topbar-height);
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .topbar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        .topbar-left {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
        }
        .topbar-left i { color: var(--secondary); margin-right: 4px; font-size: 0.7rem; }
        .topbar-left span { opacity: 0.8; }
        .topbar-right {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
        }
        .topbar-right a {
            color: var(--gray-300);
            font-size: 0.8rem;
            transition: color var(--transition);
        }
        .topbar-right a:hover { color: var(--white); }
        .topbar-right .divider { width: 1px; height: 14px; background: rgba(255,255,255,0.15); }
        @media (max-width: 640px) {
            .topbar-left span:not(.domain-text) { display: none; }
            .topbar-right .divider { display: none; }
            .topbar-right a:not(.topbar-cta) { display: none; }
        }

        /* ===== 主导航 ===== */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition);
        }
        .header.scrolled { box-shadow: var(--shadow); }
        .header .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: -0.5px;
        }
        .logo i { color: var(--primary); font-size: 1.6rem; }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover span { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav { display: flex; align-items: center; gap: var(--spacing-xl); }
        .nav a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--gray-700);
            position: relative;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2.5px;
            background: var(--primary);
            border-radius: 4px;
            transition: width var(--transition);
        }
        .nav a:hover { color: var(--primary); }
        .nav a:hover::after { width: 100%; }
        .nav a.active { color: var(--primary); }
        .nav a.active::after { width: 100%; }
        .nav-cta {
            background: var(--primary);
            color: var(--white) !important;
            padding: 8px 24px !important;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            box-shadow: 0 4px 12px rgba(37,99,235,0.3);
        }
        .nav-cta::after { display: none !important; }
        .nav-cta:hover {
            background: var(--primary-dark);
            color: var(--white) !important;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37,99,235,0.4);
        }
        .nav-cta:active { transform: translateY(0); }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }
        .menu-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--dark);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .menu-toggle.active span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
        .menu-toggle.active span:nth-child(2) { opacity: 0; }
        .menu-toggle.active span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

        @media (max-width: 768px) {
            .menu-toggle { display: flex; }
            .nav {
                position: fixed;
                top: calc(var(--header-height) + var(--topbar-height));
                left: 0;
                right: 0;
                background: var(--white);
                flex-direction: column;
                padding: var(--spacing-lg);
                gap: var(--spacing-md);
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-110%);
                opacity: 0;
                transition: all var(--transition);
                pointer-events: none;
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav a { font-size: 1.1rem; padding: 10px 0; width: 100%; text-align: center; }
            .nav a::after { display: none; }
            .nav-cta { width: 100%; text-align: center; padding: 12px !important; }
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 620px;
            display: flex;
            align-items: center;
            background: var(--dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.45;
            transform: scale(1.02);
            transition: transform 8s ease;
        }
        .hero:hover .hero-bg { transform: scale(1.06); }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.92) 0%, rgba(15,23,42,0.6) 60%, rgba(15,23,42,0.3) 100%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-2xl);
            padding-top: var(--spacing-2xl);
            padding-bottom: var(--spacing-2xl);
            width: 100%;
        }
        .hero-content { flex: 1; max-width: 620px; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(37,99,235,0.2);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(37,99,235,0.25);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.8rem;
            color: #93c5fd;
            margin-bottom: var(--spacing-lg);
            letter-spacing: 0.3px;
        }
        .hero-badge i { color: var(--secondary); font-size: 0.7rem; }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--white);
            line-height: 1.2;
            margin-bottom: var(--spacing-md);
            letter-spacing: -1px;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, #60a5fa, #93c5fd);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.75);
            line-height: 1.8;
            margin-bottom: var(--spacing-xl);
            max-width: 520px;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--primary);
            color: var(--white);
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            box-shadow: 0 8px 28px rgba(37,99,235,0.35);
            border: none;
        }
        .btn-primary i { font-size: 0.9rem; }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: var(--white);
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(37,99,235,0.45);
        }
        .btn-primary:active { transform: translateY(0); }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255,255,255,0.08);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.18);
            color: var(--white);
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 1rem;
            transition: all var(--transition);
        }
        .btn-secondary i { font-size: 0.9rem; }
        .btn-secondary:hover {
            background: rgba(255,255,255,0.16);
            color: var(--white);
            transform: translateY(-3px);
        }
        .hero-stats {
            display: flex;
            gap: var(--spacing-xl);
            margin-top: var(--spacing-xl);
            padding-top: var(--spacing-lg);
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .hero-stat h3 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--white);
            line-height: 1;
        }
        .hero-stat h3 span { color: var(--secondary); }
        .hero-stat p { font-size: 0.85rem; color: rgba(255,255,255,0.55); margin: 0; }
        .hero-visual {
            flex: 0 0 380px;
            position: relative;
        }
        .hero-visual img {
            border-radius: var(--border-radius-lg);
            box-shadow: var(--shadow-xl);
            transform: perspective(800px) rotateY(-6deg) rotateX(2deg);
            transition: transform var(--transition);
        }
        .hero-visual img:hover { transform: perspective(800px) rotateY(0deg) rotateX(0deg); }
        .hero-visual-ornament {
            position: absolute;
            top: -20px;
            right: -20px;
            width: 120px;
            height: 120px;
            border: 2px solid rgba(37,99,235,0.25);
            border-radius: var(--border-radius-lg);
            z-index: -1;
        }

        @media (max-width: 1024px) {
            .hero h1 { font-size: 2.6rem; }
            .hero-visual { flex: 0 0 300px; }
        }
        @media (max-width: 768px) {
            .hero { min-height: 520px; text-align: center; }
            .hero .container { flex-direction: column; padding-top: var(--spacing-xl); padding-bottom: var(--spacing-xl); }
            .hero-content { max-width: 100%; }
            .hero h1 { font-size: 2.2rem; }
            .hero p { margin-left: auto; margin-right: auto; }
            .hero-actions { justify-content: center; }
            .hero-stats { justify-content: center; flex-wrap: wrap; gap: var(--spacing-lg); }
            .hero-visual { display: none; }
        }
        @media (max-width: 480px) {
            .hero h1 { font-size: 1.8rem; }
            .hero p { font-size: 1rem; }
            .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--spacing-3xl) 0;
        }
        .section-alt {
            background: var(--white);
        }
        .section-dark {
            background: var(--dark);
            color: rgba(255,255,255,0.75);
        }
        .section-dark h2, .section-dark h3 { color: var(--white); }
        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-2xl);
        }
        .section-header h2 {
            margin-bottom: var(--spacing-sm);
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--gray-500);
            max-width: 560px;
            margin: 0 auto;
        }
        .section-header .badge {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.5px;
        }
        .section-dark .section-header p { color: rgba(255,255,255,0.6); }
        .section-dark .section-header .badge { background: rgba(37,99,235,0.2); color: #93c5fd; }

        /* ===== 优势板块 ===== */
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }
        .advantage-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--border-radius);
            padding: var(--spacing-xl) var(--spacing-lg);
            text-align: center;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .advantage-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition);
        }
        .advantage-card:hover::before { transform: scaleX(1); }
        .advantage-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .advantage-icon {
            width: 64px;
            height: 64px;
            background: var(--primary-bg);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--spacing-md);
            font-size: 1.6rem;
            color: var(--primary);
            transition: all var(--transition);
        }
        .advantage-card:hover .advantage-icon {
            background: var(--primary);
            color: var(--white);
            transform: scale(1.08);
        }
        .advantage-card h3 { margin-bottom: var(--spacing-sm); }
        .advantage-card p { color: var(--gray-500); font-size: 0.95rem; margin: 0; }

        @media (max-width: 768px) {
            .advantages-grid { grid-template-columns: 1fr; gap: var(--spacing-md); }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .advantages-grid { grid-template-columns: repeat(2, 1fr); }
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-lg);
        }
        .category-card {
            position: relative;
            border-radius: var(--border-radius);
            overflow: hidden;
            background: var(--dark);
            min-height: 260px;
            display: flex;
            align-items: center;
            transition: all var(--transition);
            cursor: pointer;
        }
        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.5;
            transition: all var(--transition);
        }
        .category-card:hover img {
            opacity: 0.65;
            transform: scale(1.05);
        }
        .category-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.85) 0%, rgba(15,23,42,0.4) 100%);
        }
        .category-card-content {
            position: relative;
            z-index: 2;
            padding: var(--spacing-xl);
            color: var(--white);
        }
        .category-card-content h3 {
            font-size: 1.6rem;
            color: var(--white);
            margin-bottom: var(--spacing-sm);
        }
        .category-card-content p {
            color: rgba(255,255,255,0.7);
            font-size: 0.95rem;
            max-width: 360px;
        }
        .category-card-content .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-top: var(--spacing-md);
            padding: 8px 20px;
            border: 1.5px solid rgba(255,255,255,0.35);
            border-radius: 50px;
            color: var(--white);
            font-size: 0.9rem;
            font-weight: 500;
            transition: all var(--transition);
        }
        .category-card-content .btn-outline-light:hover {
            background: var(--white);
            color: var(--dark);
            border-color: var(--white);
        }

        @media (max-width: 640px) {
            .category-grid { grid-template-columns: 1fr; }
            .category-card { min-height: 200px; }
            .category-card-content h3 { font-size: 1.3rem; }
        }

        /* ===== 最新资讯列表 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-lg);
        }
        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--border-radius);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .news-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform var(--transition);
        }
        .news-card:hover .news-card-img { transform: scale(1.03); }
        .news-card-body {
            padding: var(--spacing-lg);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card-meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: 0.8rem;
            color: var(--gray-500);
            margin-bottom: var(--spacing-sm);
        }
        .news-card-meta .tag {
            background: var(--primary-bg);
            color: var(--primary);
            padding: 2px 12px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.75rem;
        }
        .news-card-body h3 {
            font-size: 1.1rem;
            margin-bottom: var(--spacing-sm);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-body h3 a { color: var(--dark); }
        .news-card-body h3 a:hover { color: var(--primary); }
        .news-card-body p {
            color: var(--gray-500);
            font-size: 0.9rem;
            margin-bottom: var(--spacing-md);
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-body .read-more {
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: auto;
        }
        .news-card-body .read-more i { font-size: 0.75rem; transition: transform var(--transition); }
        .news-card-body .read-more:hover i { transform: translateX(4px); }

        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: var(--spacing-2xl);
            color: var(--gray-500);
            background: var(--gray-100);
            border-radius: var(--border-radius);
        }
        .news-empty i { font-size: 2rem; margin-bottom: var(--spacing-md); display: block; color: var(--gray-300); }

        @media (max-width: 768px) {
            .news-grid { grid-template-columns: 1fr; }
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
            text-align: center;
        }
        .stat-item {
            padding: var(--spacing-lg);
        }
        .stat-item .number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--white);
            line-height: 1.2;
        }
        .stat-item .number span { color: var(--secondary); }
        .stat-item .label {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
            margin-top: var(--spacing-xs);
        }
        .stat-item .icon {
            font-size: 2rem;
            color: var(--primary-light);
            margin-bottom: var(--spacing-sm);
            opacity: 0.7;
        }
        @media (max-width: 768px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: var(--spacing-md); }
            .stat-item .number { font-size: 2rem; }
        }
        @media (max-width: 480px) {
            .stats-grid { grid-template-columns: 1fr 1fr; }
        }

        /* ===== 热门推荐 ===== */
        .hot-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }
        .hot-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--border-radius);
            overflow: hidden;
            transition: all var(--transition);
        }
        .hot-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .hot-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            transition: transform var(--transition);
        }
        .hot-card:hover .hot-card-img { transform: scale(1.04); }
        .hot-card-body {
            padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
        }
        .hot-card-body .hot-badge {
            display: inline-block;
            background: #fef3c7;
            color: #d97706;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 700;
            margin-bottom: var(--spacing-sm);
        }
        .hot-card-body h3 {
            font-size: 1.05rem;
            margin-bottom: 4px;
        }
        .hot-card-body .desc {
            font-size: 0.85rem;
            color: var(--gray-500);
            margin-bottom: var(--spacing-sm);
        }
        .hot-card-body .meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--gray-500);
        }
        .hot-card-body .meta i { margin-right: 4px; }

        @media (max-width: 768px) {
            .hot-grid { grid-template-columns: 1fr; }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .hot-grid { grid-template-columns: repeat(2, 1fr); }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 740px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--border-radius-sm);
            margin-bottom: var(--spacing-sm);
            transition: all var(--transition);
            overflow: hidden;
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: var(--spacing-md) var(--spacing-lg);
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--dark);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: color var(--transition);
        }
        .faq-question i { color: var(--primary); font-size: 0.85rem; transition: transform var(--transition); }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-item.active .faq-question { color: var(--primary); }
        .faq-answer {
            padding: 0 var(--spacing-lg) var(--spacing-md);
            font-size: 0.95rem;
            color: var(--gray-500);
            line-height: 1.8;
            display: none;
        }
        .faq-item.active .faq-answer { display: block; }
        .faq-item .faq-answer { border-top: 1px solid var(--border); padding-top: var(--spacing-md); }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: var(--spacing-2xl) 0;
            text-align: center;
            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;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 {
            color: var(--white);
            font-size: 2.2rem;
            margin-bottom: var(--spacing-sm);
        }
        .cta-section p {
            color: rgba(255,255,255,0.8);
            font-size: 1.1rem;
            max-width: 540px;
            margin: 0 auto var(--spacing-lg);
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--white);
            color: var(--primary);
            padding: 16px 44px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: all var(--transition);
            box-shadow: 0 8px 28px rgba(0,0,0,0.2);
        }
        .cta-section .btn-cta:hover {
            background: var(--gray-100);
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0,0,0,0.3);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--dark);
            color: rgba(255,255,255,0.6);
            padding: var(--spacing-2xl) 0 var(--spacing-lg);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-xl);
        }
        .footer-brand .logo { margin-bottom: var(--spacing-md); }
        .footer-brand p {
            font-size: 0.9rem;
            max-width: 320px;
            line-height: 1.8;
        }
        .footer-col h4 {
            color: var(--white);
            font-size: 1rem;
            margin-bottom: var(--spacing-md);
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.5);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover { color: var(--white); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: var(--spacing-lg);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            font-size: 0.85rem;
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--white); }
        .footer-social {
            display: flex;
            gap: var(--spacing-sm);
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.5);
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: var(--white);
            padding-left: 0;
        }

        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 480px) {
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== 滚动动画 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 工具类 ===== */
        .text-center { text-align: center; }
        .mt-lg { margin-top: var(--spacing-lg); }
        .mb-lg { margin-bottom: var(--spacing-lg); }

        /* ===== 响应式微调 ===== */
        @media (max-width: 480px) {
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
            .section { padding: var(--spacing-xl) 0; }
            .hero-stats { flex-direction: column; align-items: center; gap: var(--spacing-md); }
            .hero-stat { text-align: center; }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #e74c3c;
            --primary-dark: #c0392b;
            --primary-light: #f1948a;
            --secondary: #2c3e50;
            --secondary-light: #34495e;
            --accent: #f39c12;
            --bg: #f8f9fa;
            --bg-alt: #ffffff;
            --bg-dark: #1a1a2e;
            --text: #2d3436;
            --text-light: #636e72;
            --text-white: #ffffff;
            --border: #dfe6e9;
            --border-light: #f0f0f0;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.10);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --spacing-xl: 6rem;
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-sm); }

        /* ===== Header / Top Bar ===== */
        .top-bar {
            background: var(--primary);
            color: var(--text-white);
            font-size: 0.85rem;
            padding: 0.35rem 0;
            letter-spacing: 0.3px;
        }
        .top-bar .container { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem; }
        .top-bar a { color: var(--text-white); opacity: 0.9; }
        .top-bar a:hover { opacity: 1; color: var(--text-white); }
        .top-bar .top-left i { margin-right: 4px; }
        .top-bar .top-right { display: flex; gap: 1.2rem; align-items: center; }
        .top-bar .top-right .sep { opacity: 0.4; }

        /* ===== Header / Nav ===== */
        .header {
            background: var(--bg-alt);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-sm);
        }
        .header .container { display: flex; align-items: center; justify-content: space-between; height: 70px; }
        .logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 1.4rem; font-weight: 700; color: var(--primary); letter-spacing: -0.5px;
        }
        .logo i { font-size: 1.6rem; color: var(--primary); }
        .logo span { color: var(--secondary); }
        .logo:hover { color: var(--primary); }
        .nav { display: flex; align-items: center; gap: 0.25rem; }
        .nav a {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 0.5rem 1.1rem; border-radius: var(--radius-sm);
            font-size: 0.95rem; font-weight: 500; color: var(--text); transition: var(--transition);
            position: relative; white-space: nowrap;
        }
        .nav a i { font-size: 0.9rem; opacity: 0.6; }
        .nav a::after {
            content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%);
            width: 0; height: 3px; border-radius: 2px; background: var(--primary);
            transition: var(--transition);
        }
        .nav a:hover { color: var(--primary); background: rgba(231,76,60,0.06); }
        .nav a:hover::after { width: 60%; }
        .nav a.active { color: var(--primary); background: rgba(231,76,60,0.08); }
        .nav a.active::after { width: 60%; }
        .nav a.nav-cta {
            background: var(--primary); color: var(--text-white); border-radius: 50px;
            padding: 0.5rem 1.5rem; font-weight: 600; box-shadow: 0 4px 14px rgba(231,76,60,0.3);
        }
        .nav a.nav-cta i { opacity: 1; color: var(--text-white); }
        .nav a.nav-cta::after { display: none; }
        .nav a.nav-cta:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(231,76,60,0.35); }
        .nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--text); cursor: pointer; padding: 0.25rem; }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            padding: var(--spacing-lg) 0 var(--spacing-md);
            background: linear-gradient(135deg, var(--bg-dark) 0%, #16213e 100%);
            min-height: 280px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .article-banner .container { position: relative; z-index: 1; }
        .article-banner .breadcrumb {
            display: flex; flex-wrap: wrap; gap: 0.5rem;
            font-size: 0.9rem; color: rgba(255,255,255,0.6); margin-bottom: var(--spacing-sm);
        }
        .article-banner .breadcrumb a { color: rgba(255,255,255,0.7); }
        .article-banner .breadcrumb a:hover { color: var(--text-white); }
        .article-banner .breadcrumb .sep { margin: 0 0.25rem; opacity: 0.5; }
        .article-banner h1 {
            font-size: 2.2rem; font-weight: 700; color: var(--text-white);
            line-height: 1.3; margin-bottom: 0.75rem; max-width: 850px;
        }
        .article-banner .meta {
            display: flex; flex-wrap: wrap; gap: 1.5rem;
            color: rgba(255,255,255,0.7); font-size: 0.9rem; align-items: center;
        }
        .article-banner .meta i { margin-right: 5px; opacity: 0.7; }
        .article-banner .meta .badge-cat {
            display: inline-block; background: var(--primary); color: var(--text-white);
            padding: 0.2rem 0.9rem; border-radius: 50px; font-size: 0.8rem; font-weight: 500;
        }
        .article-banner .meta .badge-cat i { margin-right: 4px; opacity: 1; }

        /* ===== Article Main ===== */
        .article-main { padding: var(--spacing-lg) 0; }
        .article-layout {
            display: grid; grid-template-columns: 1fr 320px; gap: var(--spacing-lg);
        }

        /* ===== Article Content ===== */
        .article-content {
            background: var(--bg-alt);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-md);
            overflow: hidden;
        }
        .article-content .featured-image {
            width: 100%; border-radius: var(--radius-sm); margin-bottom: var(--spacing-md);
            max-height: 420px; object-fit: cover;
        }
        .article-content .body-text {
            font-size: 1.05rem; line-height: 1.9; color: var(--text);
        }
        .article-content .body-text p { margin-bottom: 1.2rem; }
        .article-content .body-text h2, .article-content .body-text h3 {
            margin-top: 2rem; margin-bottom: 1rem; font-weight: 700; color: var(--secondary);
        }
        .article-content .body-text h2 { font-size: 1.6rem; }
        .article-content .body-text h3 { font-size: 1.25rem; }
        .article-content .body-text ul, .article-content .body-text ol {
            margin-bottom: 1.2rem; padding-left: 1.5rem;
        }
        .article-content .body-text ul { list-style: disc; }
        .article-content .body-text ol { list-style: decimal; }
        .article-content .body-text ul li, .article-content .body-text ol li { margin-bottom: 0.35rem; }
        .article-content .body-text img { border-radius: var(--radius-sm); margin: 1.5rem auto; }
        .article-content .body-text blockquote {
            border-left: 4px solid var(--primary); background: rgba(231,76,60,0.05);
            padding: 1rem 1.5rem; margin: 1.5rem 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
        }
        .article-content .body-text a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }

        /* ===== Article Tags ===== */
        .article-tags {
            display: flex; flex-wrap: wrap; gap: 0.6rem;
            margin-top: var(--spacing-md); padding-top: var(--spacing-sm);
            border-top: 1px solid var(--border-light);
        }
        .article-tags .tag {
            display: inline-flex; align-items: center; gap: 5px;
            background: var(--bg); color: var(--text-light); padding: 0.35rem 1rem;
            border-radius: 50px; font-size: 0.85rem; transition: var(--transition);
            border: 1px solid var(--border);
        }
        .article-tags .tag i { font-size: 0.75rem; opacity: 0.6; }
        .article-tags .tag:hover { background: var(--primary); color: var(--text-white); border-color: var(--primary); }

        /* ===== Article Share ===== */
        .article-share {
            display: flex; align-items: center; gap: 0.8rem;
            margin-top: var(--spacing-sm); padding-top: var(--spacing-sm);
            border-top: 1px solid var(--border-light);
        }
        .article-share span { font-size: 0.9rem; color: var(--text-light); font-weight: 500; }
        .article-share a {
            display: inline-flex; align-items: center; justify-content: center;
            width: 38px; height: 38px; border-radius: 50%;
            background: var(--bg); color: var(--text-light); border: 1px solid var(--border);
            transition: var(--transition); font-size: 1rem;
        }
        .article-share a:hover { background: var(--primary); color: var(--text-white); border-color: var(--primary); transform: translateY(-2px); }

        /* ===== Sidebar ===== */
        .article-sidebar { display: flex; flex-direction: column; gap: var(--spacing-md); }
        .sidebar-card {
            background: var(--bg-alt);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-md);
        }
        .sidebar-card h3 {
            font-size: 1.1rem; font-weight: 700; color: var(--secondary);
            margin-bottom: var(--spacing-sm); padding-bottom: 0.75rem;
            border-bottom: 2px solid var(--border-light);
            display: flex; align-items: center; gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-list { display: flex; flex-direction: column; gap: 0.75rem; }
        .sidebar-list li { border-bottom: 1px solid var(--border-light); padding-bottom: 0.75rem; }
        .sidebar-list li:last-child { border-bottom: none; padding-bottom: 0; }
        .sidebar-list a {
            display: flex; gap: 0.75rem; align-items: flex-start;
            color: var(--text); transition: var(--transition);
        }
        .sidebar-list a:hover { color: var(--primary); }
        .sidebar-list a .thumb {
            width: 70px; height: 55px; border-radius: var(--radius-sm); object-fit: cover;
            flex-shrink: 0; background: var(--bg);
        }
        .sidebar-list a .info { flex: 1; }
        .sidebar-list a .info .s-title {
            font-size: 0.9rem; font-weight: 600; line-height: 1.4;
            display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
        }
        .sidebar-list a .info .s-date { font-size: 0.78rem; color: var(--text-light); margin-top: 0.25rem; display: block; }

        /* ===== Sidebar CTA ===== */
        .sidebar-cta { text-align: center; }
        .sidebar-cta h4 { font-size: 1.1rem; color: var(--secondary); margin-bottom: 0.5rem; }
        .sidebar-cta p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 1rem; }
        .sidebar-cta .btn-block { width: 100%; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 0.65rem 1.8rem; border-radius: 50px;
            font-weight: 600; font-size: 0.95rem; border: none; cursor: pointer;
            transition: var(--transition); text-align: center; justify-content: center;
        }
        .btn-primary { background: var(--primary); color: var(--text-white); box-shadow: 0 4px 14px rgba(231,76,60,0.3); }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(231,76,60,0.35); color: var(--text-white); }
        .btn-outline { background: transparent; color: var(--text); border: 1.5px solid var(--border); }
        .btn-outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(231,76,60,0.04); }
        .btn-sm { padding: 0.4rem 1.2rem; font-size: 0.85rem; }
        .btn-lg { padding: 0.85rem 2.5rem; font-size: 1.05rem; }

        /* ===== Related Posts ===== */
        .related-section { padding: var(--spacing-lg) 0 var(--spacing-xl); background: var(--bg); }
        .related-section .section-title {
            text-align: center; margin-bottom: var(--spacing-md);
        }
        .related-section .section-title h2 { font-size: 1.8rem; font-weight: 700; color: var(--secondary); }
        .related-section .section-title p { color: var(--text-light); font-size: 1rem; }
        .related-grid {
            display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-md);
        }
        .related-card {
            background: var(--bg-alt); border-radius: var(--radius-md); box-shadow: var(--shadow-sm);
            overflow: hidden; transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .related-card .rc-img {
            width: 100%; height: 160px; object-fit: cover; border-radius: 0;
        }
        .related-card .rc-body { padding: 1rem 1.2rem 1.2rem; }
        .related-card .rc-body h4 {
            font-size: 1rem; font-weight: 600; color: var(--secondary);
            display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
            min-height: 2.8rem; margin-bottom: 0.4rem;
        }
        .related-card .rc-body .rc-meta { font-size: 0.8rem; color: var(--text-light); display: flex; gap: 1rem; }

        /* ===== Not Found ===== */
        .not-found {
            text-align: center; padding: var(--spacing-xl) var(--spacing-sm);
            background: var(--bg-alt); border-radius: var(--radius-md); box-shadow: var(--shadow-sm);
        }
        .not-found i { font-size: 4rem; color: var(--text-light); opacity: 0.3; margin-bottom: 1rem; }
        .not-found h2 { font-size: 1.8rem; color: var(--secondary); margin-bottom: 0.5rem; }
        .not-found p { color: var(--text-light); margin-bottom: 1.5rem; font-size: 1.05rem; }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark); color: rgba(255,255,255,0.8); padding: var(--spacing-lg) 0 0;
        }
        .footer .footer-grid {
            display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: var(--spacing-md);
            margin-bottom: var(--spacing-md);
        }
        .footer .footer-brand .logo { color: var(--text-white); margin-bottom: var(--spacing-sm); }
        .footer .footer-brand .logo span { color: var(--text-white); }
        .footer .footer-brand p { font-size: 0.9rem; line-height: 1.7; opacity: 0.7; max-width: 360px; }
        .footer .footer-social a {
            display: inline-flex; align-items: center; justify-content: center;
            width: 38px; height: 38px; border-radius: 50%; background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.7); margin-right: 0.5rem; transition: var(--transition);
        }
        .footer .footer-social a:hover { background: var(--primary); color: var(--text-white); transform: translateY(-2px); }
        .footer .footer-col h4 { color: var(--text-white); font-size: 1rem; font-weight: 600; margin-bottom: 1rem; }
        .footer .footer-col a {
            display: block; color: rgba(255,255,255,0.6); font-size: 0.9rem;
            padding: 0.3rem 0; transition: var(--transition);
        }
        .footer .footer-col a:hover { color: var(--text-white); padding-left: 4px; }
        .footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 1.2rem 0; margin-top: var(--spacing-sm);
            display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem;
            font-size: 0.85rem; opacity: 0.6;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .nav { display: none; flex-direction: column; position: absolute; top: 70px; left: 0; right: 0; background: var(--bg-alt); border-bottom: 2px solid var(--border); padding: 1rem; box-shadow: var(--shadow-md); gap: 0.25rem; }
            .nav.open { display: flex; }
            .nav a { padding: 0.75rem 1rem; width: 100%; border-radius: var(--radius-sm); }
            .nav a::after { display: none; }
            .nav a.active { background: rgba(231,76,60,0.08); }
            .nav a.nav-cta { width: 100%; text-align: center; margin-top: 0.5rem; }
            .nav-toggle { display: block; }
            .top-bar .top-right { display: none; }
            .article-banner h1 { font-size: 1.6rem; }
            .article-banner { min-height: 220px; padding: var(--spacing-md) 0; }
            .article-content { padding: var(--spacing-sm); }
            .article-content .body-text { font-size: 0.98rem; }
            .related-grid { grid-template-columns: 1fr; }
            .footer .footer-grid { grid-template-columns: 1fr; }
            .footer .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .article-banner h1 { font-size: 1.3rem; }
            .article-banner .meta { gap: 0.75rem; font-size: 0.8rem; flex-wrap: wrap; }
            .article-content .body-text { font-size: 0.92rem; }
            .sidebar-list a .thumb { width: 55px; height: 45px; }
            .related-card .rc-img { height: 130px; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --color-primary: #6c3cf1;
            --color-primary-dark: #5228c9;
            --color-primary-light: #8b6bf7;
            --color-secondary: #f59e0b;
            --color-secondary-dark: #d97706;
            --color-accent: #10b981;
            --color-bg: #f8f7fc;
            --color-bg-alt: #ffffff;
            --color-bg-dark: #0f0a1a;
            --color-bg-card: #ffffff;
            --color-text: #1a0e2e;
            --color-text-light: #5a4a7a;
            --color-text-muted: #8a7aaa;
            --color-border: #e4dff0;
            --color-border-light: #f0ecf6;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(108, 60, 241, 0.06);
            --shadow-md: 0 8px 28px rgba(108, 60, 241, 0.10);
            --shadow-lg: 0 18px 48px rgba(108, 60, 241, 0.14);
            --shadow-hover: 0 20px 50px rgba(108, 60, 241, 0.20);
            --spacing-xs: 6px;
            --spacing-sm: 12px;
            --spacing-md: 24px;
            --spacing-lg: 48px;
            --spacing-xl: 80px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.30s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

        /* ===== 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);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--color-primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--color-primary-light);
            outline-offset: 2px;
            border-radius: 4px;
        }

        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;
            font-weight: 700;
            color: var(--color-text);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        /* ===== Header & Navigation ===== */
        .top-bar {
            background: var(--color-bg-dark);
            color: rgba(255, 255, 255, 0.75);
            font-size: 13px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .top-bar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px 16px;
        }
        .top-bar a {
            color: rgba(255, 255, 255, 0.75);
            font-size: 13px;
        }
        .top-bar a:hover {
            color: #fff;
        }
        .top-bar .top-left {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .top-bar .top-left i {
            margin-right: 4px;
            color: var(--color-secondary);
        }
        .top-bar .top-right {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .top-bar .top-right .badge {
            background: var(--color-secondary);
            color: #1a0e2e;
            font-size: 11px;
            font-weight: 700;
            padding: 2px 10px;
            border-radius: 20px;
        }

        .header {
            background: var(--color-bg-alt);
            border-bottom: 1px solid var(--color-border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: -0.3px;
        }
        .logo i {
            color: var(--color-primary);
            font-size: 28px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .logo span {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .logo:hover {
            opacity: 0.9;
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 15px;
            color: var(--color-text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav a:hover {
            color: var(--color-primary);
            background: rgba(108, 60, 241, 0.06);
        }
        .nav a.active {
            color: #fff;
            background: var(--color-primary);
            box-shadow: 0 4px 14px rgba(108, 60, 241, 0.30);
        }
        .nav a.active:hover {
            background: var(--color-primary-dark);
            color: #fff;
        }
        .nav .nav-cta {
            background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-dark));
            color: #fff !important;
            padding: 8px 22px;
            border-radius: 30px;
            font-weight: 700;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
        }
        .nav .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.45);
            background: linear-gradient(135deg, var(--color-secondary-dark), var(--color-secondary));
        }
        .nav .nav-cta i {
            margin-right: 6px;
        }

        /* Mobile toggle */
        .nav-toggle {
            display: none;
            font-size: 24px;
            color: var(--color-text);
            padding: 8px;
            border-radius: 8px;
            background: none;
            border: 1px solid var(--color-border);
            transition: all var(--transition);
        }
        .nav-toggle:hover {
            background: var(--color-bg);
            border-color: var(--color-primary);
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            position: relative;
            padding: var(--spacing-xl) 0;
            background: linear-gradient(135deg, var(--color-bg-dark) 0%, #1a0e2e 50%, #2a1a4e 100%);
            overflow: hidden;
            min-height: 340px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 60%, rgba(108, 60, 241, 0.25), transparent 60%),
                radial-gradient(ellipse at 80% 30%, rgba(245, 158, 11, 0.12), transparent 50%);
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-hero .breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(10px);
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: var(--spacing-md);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .page-hero .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
        }
        .page-hero .breadcrumb a:hover {
            color: #fff;
        }
        .page-hero .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.3);
        }
        .page-hero h1 {
            font-size: clamp(2.2rem, 5.5vw, 3.8rem);
            font-weight: 900;
            color: #fff;
            letter-spacing: -1px;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .page-hero h1 i {
            color: var(--color-secondary);
            margin-right: 10px;
        }
        .page-hero p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 680px;
            margin: 0 auto var(--spacing-md);
            line-height: 1.8;
        }
        .page-hero .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-top: 8px;
        }
        .page-hero .hero-tags span {
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.10);
            padding: 5px 16px;
            border-radius: 30px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.8);
        }

        /* ===== Section Shared ===== */
        .section {
            padding: var(--spacing-xl) 0;
        }
        .section-alt {
            background: var(--color-bg-alt);
        }
        .section-dark {
            background: var(--color-bg-dark);
            color: rgba(255, 255, 255, 0.85);
        }
        .section-dark h2,
        .section-dark h3 {
            color: #fff;
        }
        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-lg);
        }
        .section-header h2 {
            font-size: clamp(1.8rem, 3.6vw, 2.8rem);
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }
        .section-header h2 i {
            color: var(--color-primary);
            margin-right: 8px;
        }
        .section-header p {
            color: var(--color-text-muted);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .section-header .divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
            border-radius: 4px;
            margin: 14px auto 0;
        }

        /* ===== Cards ===== */
        .card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--color-border);
        }
        .card .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }
        .card .card-body {
            padding: var(--spacing-md);
        }
        .card .card-body .tag {
            display: inline-block;
            background: rgba(108, 60, 241, 0.08);
            color: var(--color-primary);
            font-size: 12px;
            font-weight: 700;
            padding: 2px 12px;
            border-radius: 20px;
            margin-bottom: 8px;
        }
        .card .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card .card-body h3 a {
            color: var(--color-text);
        }
        .card .card-body h3 a:hover {
            color: var(--color-primary);
        }
        .card .card-body p {
            color: var(--color-text-light);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .card .card-body .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--color-text-muted);
            border-top: 1px solid var(--color-border-light);
            padding-top: 12px;
            margin-top: 4px;
        }
        .card .card-body .meta i {
            margin-right: 4px;
        }

        /* ===== Grid ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-md);
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
        }

        /* ===== Tags / Badges ===== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .tag-list .tag-item {
            background: var(--color-bg-alt);
            border: 1px solid var(--color-border);
            padding: 6px 20px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text-light);
            transition: all var(--transition);
            cursor: default;
        }
        .tag-list .tag-item:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: rgba(108, 60, 241, 0.04);
            transform: translateY(-2px);
        }
        .tag-list .tag-item.active {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            box-shadow: 0 4px 14px rgba(108, 60, 241, 0.25);
        }

        /* ===== Guide Category Cards (icon cards) ===== */
        .guide-cat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
        }
        .guide-cat-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            text-align: center;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .guide-cat-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--color-border);
        }
        .guide-cat-card .icon-wrap {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(108, 60, 241, 0.08), rgba(245, 158, 11, 0.08));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px;
            font-size: 26px;
            color: var(--color-primary);
        }
        .guide-cat-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .guide-cat-card p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.5;
        }

        /* ===== Featured Guide (large card) ===== */
        .featured-guide {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-md);
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--color-border-light);
        }
        .featured-guide .fg-img {
            width: 100%;
            height: 100%;
            min-height: 300px;
            object-fit: cover;
        }
        .featured-guide .fg-body {
            padding: var(--spacing-lg);
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .featured-guide .fg-body .badge-cat {
            display: inline-block;
            background: var(--color-primary);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
            width: fit-content;
        }
        .featured-guide .fg-body h3 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .featured-guide .fg-body p {
            color: var(--color-text-light);
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .featured-guide .fg-body .btn {
            align-self: flex-start;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 15px;
            transition: all var(--transition);
            border: none;
            background: var(--color-primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(108, 60, 241, 0.25);
        }
        .btn:hover {
            background: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(108, 60, 241, 0.35);
            color: #fff;
        }
        .btn-secondary {
            background: var(--color-secondary);
            color: #1a0e2e;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.30);
        }
        .btn-secondary:hover {
            background: var(--color-secondary-dark);
            color: #1a0e2e;
            box-shadow: 0 8px 28px rgba(245, 158, 11, 0.40);
        }
        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
            box-shadow: none;
        }
        .btn-outline:hover {
            background: var(--color-primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(108, 60, 241, 0.25);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 13px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .faq-item:hover {
            border-color: var(--color-border);
            box-shadow: var(--shadow-md);
        }
        .faq-item .faq-q {
            padding: 18px 22px;
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--color-text);
            background: none;
            width: 100%;
            text-align: left;
            border: none;
            transition: background var(--transition);
        }
        .faq-item .faq-q:hover {
            background: rgba(108, 60, 241, 0.03);
        }
        .faq-item .faq-q i {
            color: var(--color-primary);
            transition: transform var(--transition);
            font-size: 14px;
        }
        .faq-item .faq-q[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-item .faq-a {
            padding: 0 22px 18px;
            color: var(--color-text-light);
            line-height: 1.8;
            font-size: 0.95rem;
            display: none;
        }
        .faq-item .faq-a.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-bg-dark) 0%, #2a1a4e 100%);
            padding: var(--spacing-xl) 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: #fff;
            font-size: clamp(1.8rem, 3.6vw, 2.8rem);
            font-weight: 800;
            margin-bottom: 14px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto var(--spacing-md);
        }
        .cta-section .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--color-bg-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: var(--spacing-lg) 0 var(--spacing-md);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-md);
        }
        .footer .footer-brand .logo {
            color: #fff;
            margin-bottom: 12px;
        }
        .footer .footer-brand .logo i {
            -webkit-text-fill-color: unset;
            color: var(--color-primary-light);
        }
        .footer .footer-brand .logo span {
            -webkit-text-fill-color: unset;
            color: #fff;
            background: none;
        }
        .footer .footer-brand p {
            font-size: 0.95rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 360px;
        }
        .footer .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.6);
            font-size: 16px;
            transition: all var(--transition);
            margin-right: 8px;
        }
        .footer .footer-social a:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.92rem;
            padding: 4px 0;
            transition: all var(--transition);
        }
        .footer .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: var(--spacing-md);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .guide-cat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: var(--color-bg-alt);
                flex-direction: column;
                justify-content: center;
                align-items: center;
                gap: 16px;
                padding: var(--spacing-lg);
                z-index: 200;
                transform: translateX(100%);
                transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                box-shadow: var(--shadow-lg);
            }
            .nav.open {
                transform: translateX(0);
            }
            .nav a {
                font-size: 1.3rem;
                padding: 12px 28px;
                width: auto;
                text-align: center;
            }
            .nav .nav-cta {
                margin-top: 8px;
            }
            .nav-close {
                position: absolute;
                top: 20px;
                right: 20px;
                font-size: 28px;
                color: var(--color-text);
                background: none;
                border: none;
                padding: 8px;
            }
            .header .container {
                height: 60px;
            }
            .logo {
                font-size: 18px;
            }
            .logo i {
                font-size: 22px;
            }

            .grid-3 {
                grid-template-columns: 1fr;
            }
            .grid-2 {
                grid-template-columns: 1fr;
            }
            .grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .guide-cat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .featured-guide {
                grid-template-columns: 1fr;
            }
            .featured-guide .fg-img {
                min-height: 200px;
            }
            .featured-guide .fg-body {
                padding: var(--spacing-md);
            }
            .featured-guide .fg-body h3 {
                font-size: 1.4rem;
            }

            .page-hero {
                min-height: 260px;
                padding: var(--spacing-lg) 0;
            }
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .page-hero p {
                font-size: 1rem;
            }

            .section {
                padding: var(--spacing-lg) 0;
            }

            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .top-bar .top-right .badge {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .guide-cat-grid {
                grid-template-columns: 1fr;
            }
            .container {
                padding: 0 var(--spacing-sm);
            }
            .top-bar {
                font-size: 12px;
            }
            .top-bar .container {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
            }
            .page-hero h1 {
                font-size: 1.5rem;
            }
            .page-hero .hero-tags span {
                font-size: 12px;
                padding: 4px 12px;
            }
            .card .card-body {
                padding: var(--spacing-sm);
            }
            .btn {
                padding: 10px 22px;
                font-size: 14px;
            }
            .faq-item .faq-q {
                font-size: 0.95rem;
                padding: 14px 16px;
            }
            .faq-item .faq-a {
                padding: 0 16px 14px;
                font-size: 0.9rem;
            }
        }

        /* ===== Mobile overlay ===== */
        .nav-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 150;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s;
        }
        .nav-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--color-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--color-border);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--color-text-muted);
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-up {
            animation: fadeUp 0.7s ease forwards;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }