/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c3bcf;
            --primary-dark: #4a1f96;
            --primary-light: #8b5cf6;
            --accent: #f59e0b;
            --accent-hover: #d97706;
            --bg-dark: #0b0719;
            --bg-card: rgba(255, 255, 255, 0.04);
            --bg-card-hover: rgba(255, 255, 255, 0.08);
            --bg-elevated: rgba(255, 255, 255, 0.06);
            --text-primary: #f1edf9;
            --text-secondary: #b0a3c9;
            --text-muted: #7a6d94;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 40px rgba(108, 59, 207, 0.25);
            --nav-width: 240px;
            --header-h: 64px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::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);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
            display: flex;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

        /* ===== 左侧导航 ===== */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: rgba(11, 7, 25, 0.98);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            backdrop-filter: blur(12px);
            transition: transform var(--transition);
        }

        .side-nav .logo {
            padding: 28px 24px 20px;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .side-nav .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 0 20px rgba(108, 59, 207, 0.35);
        }

        .side-nav .logo-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.3px;
            line-height: 1.3;
        }

        .side-nav .logo-text small {
            display: block;
            font-size: 10px;
            font-weight: 400;
            color: var(--text-muted);
            letter-spacing: 0.5px;
            margin-top: 1px;
        }

        .side-nav .nav-list {
            flex: 1;
            padding: 20px 16px;
            overflow-y: auto;
        }

        .side-nav .nav-label {
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--text-muted);
            padding: 12px 12px 8px;
            font-weight: 600;
        }

        .side-nav .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            margin-bottom: 2px;
            position: relative;
        }

        .side-nav .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            flex-shrink: 0;
        }

        .side-nav .nav-link:hover {
            background: var(--bg-card);
            color: var(--text-primary);
        }

        .side-nav .nav-link.active {
            background: rgba(108, 59, 207, 0.15);
            color: var(--primary-light);
            box-shadow: inset 3px 0 0 var(--primary);
        }

        .side-nav .nav-footer {
            padding: 20px 24px;
            border-top: 1px solid var(--border-color);
            font-size: 12px;
            color: var(--text-muted);
            text-align: center;
        }

        /* ===== 移动端顶部栏 ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-h);
            background: rgba(11, 7, 25, 0.96);
            border-bottom: 1px solid var(--border-color);
            z-index: 1001;
            padding: 0 20px;
            align-items: center;
            justify-content: space-between;
            backdrop-filter: blur(12px);
        }

        .mobile-header .logo-text {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .mobile-header .logo-text small {
            font-size: 9px;
            color: var(--text-muted);
            display: block;
            line-height: 1;
        }

        .hamburger {
            width: 40px;
            height: 40px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .hamburger:hover {
            background: var(--bg-card);
        }

        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 998;
            backdrop-filter: blur(4px);
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: var(--nav-width);
            flex: 1;
            min-height: 100vh;
        }

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

        .container-narrow {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ===== 板块间距 ===== */
        .section {
            padding: 90px 0;
        }

        .section-sm {
            padding: 60px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }

        .section-header h2 {
            font-size: 36px;
            font-weight: 700;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--text-primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 12px;
        }

        .section-header p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .section-divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 4px;
            margin: 16px auto 0;
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding: 120px 0 100px;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 7, 25, 0.88) 0%, rgba(11, 7, 25, 0.5) 60%, rgba(108, 59, 207, 0.15) 100%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 200px;
            background: linear-gradient(transparent, var(--bg-dark));
            z-index: 1;
        }

        .hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(108, 59, 207, 0.2);
            border: 1px solid rgba(108, 59, 207, 0.3);
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 13px;
            color: var(--primary-light);
            margin-bottom: 24px;
            backdrop-filter: blur(8px);
        }

        .hero-badge i {
            font-size: 12px;
        }

        .hero h1 {
            font-size: 56px;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -1px;
            max-width: 720px;
            margin-bottom: 20px;
        }

        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 560px;
            line-height: 1.7;
            margin-bottom: 36px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .hero-actions .btn-primary {
            padding: 16px 40px;
            font-size: 17px;
            font-weight: 600;
        }

        .hero-actions .btn-ghost {
            padding: 16px 32px;
            font-size: 16px;
        }

        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 60px;
            padding-top: 40px;
            border-top: 1px solid var(--border-color);
        }

        .hero-stats .stat-item {
            text-align: left;
        }

        .hero-stats .stat-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.2;
        }

        .hero-stats .stat-number span {
            color: var(--primary-light);
        }

        .hero-stats .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            padding: 14px 32px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(108, 59, 207, 0.35);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 35px rgba(108, 59, 207, 0.5);
        }

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

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--bg-elevated);
            color: var(--text-primary);
            padding: 14px 32px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 15px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: pointer;
        }

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

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 15px;
            padding: 12px 24px;
            border-radius: 40px;
            transition: var(--transition);
        }

        .btn-ghost:hover {
            background: var(--bg-card);
            color: var(--text-primary);
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
            color: #1a1a2e;
            padding: 14px 36px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 15px;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
            border: none;
            cursor: pointer;
        }

        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 35px rgba(245, 158, 11, 0.45);
        }

        .btn-sm {
            padding: 10px 20px;
            font-size: 13px;
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: var(--transition);
        }

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

        .card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(108, 59, 207, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary-light);
            margin-bottom: 16px;
        }

        .card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== 网格 ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 28px;
        }

        .grid-4 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 24px;
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            min-height: 200px;
            display: flex;
            align-items: flex-end;
        }

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

        .category-card .cat-bg {
            position: absolute;
            inset: 0;
            object-fit: cover;
            width: 100%;
            height: 100%;
            opacity: 0.3;
            transition: var(--transition);
        }

        .category-card:hover .cat-bg {
            opacity: 0.5;
            transform: scale(1.05);
        }

        .category-card .cat-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(transparent 30%, rgba(11, 7, 25, 0.9));
            z-index: 1;
        }

        .category-card .cat-content {
            position: relative;
            z-index: 2;
            padding: 28px 24px;
            width: 100%;
        }

        .category-card .cat-content h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .category-card .cat-content p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }

        .category-card .cat-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--primary-light);
            font-weight: 500;
        }

        .category-card .cat-tag i {
            font-size: 12px;
            transition: var(--transition);
        }

        .category-card:hover .cat-tag i {
            transform: translateX(4px);
        }

        /* ===== 特色亮点 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 28px;
        }

        .feature-card {
            text-align: center;
            padding: 40px 28px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .feature-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .feature-card .feat-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(108, 59, 207, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 28px;
            color: var(--primary-light);
            transition: var(--transition);
        }

        .feature-card:hover .feat-icon {
            background: rgba(108, 59, 207, 0.25);
            transform: scale(1.05);
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== 最新资讯列表 ===== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 20px 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .news-item:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-light);
            transform: translateX(4px);
        }

        .news-item .news-meta {
            flex-shrink: 0;
            text-align: center;
            min-width: 60px;
        }

        .news-item .news-day {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary-light);
            line-height: 1.1;
        }

        .news-item .news-month {
            font-size: 12px;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .news-item .news-body {
            flex: 1;
            min-width: 0;
        }

        .news-item .news-body h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.4;
        }

        .news-item .news-body h4 a {
            color: inherit;
        }

        .news-item .news-body h4 a:hover {
            color: var(--primary-light);
        }

        .news-item .news-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-item .news-tag {
            display: inline-block;
            padding: 2px 10px;
            border-radius: 20px;
            font-size: 11px;
            font-weight: 500;
            background: rgba(108, 59, 207, 0.15);
            color: var(--primary-light);
            margin-top: 6px;
        }

        .news-empty {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            font-size: 15px;
        }

        .news-empty i {
            font-size: 40px;
            display: block;
            margin-bottom: 12px;
            opacity: 0.4;
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 20px;
            counter-reset: step;
        }

        .step-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            position: relative;
            transition: var(--transition);
        }

        .step-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
        }

        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 42px;
            font-weight: 800;
            color: rgba(108, 59, 207, 0.1);
            line-height: 1;
        }

        .step-card .step-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(108, 59, 207, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 24px;
            color: var(--primary-light);
        }

        .step-card h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
        }

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

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

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

        .faq-item:hover {
            border-color: var(--border-light);
        }

        .faq-item .faq-question {
            width: 100%;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-primary);
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            transition: var(--transition);
        }

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

        .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(--primary-light);
        }

        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA 区块 ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(108, 59, 207, 0.08), rgba(245, 158, 11, 0.05));
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(108, 59, 207, 0.12), transparent);
            border-radius: 50%;
        }

        .cta-section h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
        }

        .cta-section p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto 28px;
            position: relative;
        }

        .cta-section .btn-accent {
            position: relative;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            border-top: 1px solid var(--border-color);
            padding: 48px 0 32px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand .logo-text {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            display: block;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            max-width: 300px;
            line-height: 1.6;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 4px 0;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }

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

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

        /* ===== 背景装饰 ===== */
        .bg-glow {
            position: relative;
        }

        .bg-glow::before {
            content: '';
            position: absolute;
            top: -20%;
            left: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(108, 59, 207, 0.06), transparent);
            pointer-events: none;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero h1 {
                font-size: 42px;
            }
        }

        @media (max-width: 768px) {
            .side-nav {
                transform: translateX(-100%);
            }

            .side-nav.open {
                transform: translateX(0);
            }

            .mobile-header {
                display: flex;
            }

            .mobile-nav-overlay.active {
                display: block;
            }

            .main-content {
                margin-left: 0;
                padding-top: var(--header-h);
            }

            .container {
                padding: 0 20px;
            }

            .section {
                padding: 60px 0;
            }

            .hero {
                min-height: auto;
                padding: 80px 0 60px;
            }

            .hero h1 {
                font-size: 34px;
            }

            .hero p {
                font-size: 16px;
            }

            .hero-stats {
                flex-wrap: wrap;
                gap: 24px;
            }

            .hero-stats .stat-number {
                font-size: 26px;
            }

            .grid-2,
            .grid-3,
            .grid-4,
            .features-grid,
            .category-grid {
                grid-template-columns: 1fr;
            }

            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .section-header h2 {
                font-size: 28px;
            }

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

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .news-item {
                flex-direction: column;
                gap: 8px;
            }

            .news-item .news-meta {
                display: flex;
                gap: 6px;
                align-items: baseline;
            }

            .news-item .news-day {
                font-size: 20px;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 28px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-actions .btn-primary,
            .hero-actions .btn-ghost {
                justify-content: center;
                text-align: center;
            }

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

            .section-header h2 {
                font-size: 24px;
            }

            .container {
                padding: 0 16px;
            }

            .section {
                padding: 40px 0;
            }

            .faq-item .faq-question {
                font-size: 14px;
                padding: 16px 16px;
            }

            .faq-item .faq-answer {
                font-size: 13px;
                padding: 0 16px;
            }

            .faq-item.active .faq-answer {
                padding: 0 16px 16px;
            }

            .card {
                padding: 20px 16px;
            }

            .feature-card {
                padding: 28px 20px;
            }

            .category-card .cat-content {
                padding: 20px 16px;
            }

            .news-item {
                padding: 16px;
            }

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

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

/* roulang page: article */
:root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --primary-dark: #0f0f1a;
            --accent: #e94560;
            --accent-light: #ff6b81;
            --accent-dark: #c2304a;
            --gold: #f5c518;
            --gold-light: #ffe066;
            --bg: #f8f9fc;
            --bg-card: #ffffff;
            --bg-dark: #1a1a2e;
            --text: #1a1a2e;
            --text-light: #6b7280;
            --text-white: #ffffff;
            --text-muted: #9ca3af;
            --border: #e5e7eb;
            --border-light: #f0f0f5;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.10);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.15);
            --shadow-glow: 0 0 30px rgba(233,69,96,0.25);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --radius-lg: 24px;
            --nav-width: 240px;
            --header-height: 0px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

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

        html { scroll-behavior: smooth; }

        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            display: flex;
            min-height: 100vh;
        }

        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Left Sidebar Navigation ===== */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--primary);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            padding: 24px 0;
            z-index: 1000;
            overflow-y: auto;
            border-right: 1px solid rgba(255,255,255,0.06);
            box-shadow: 4px 0 30px rgba(0,0,0,0.2);
            transition: var(--transition);
        }

        .side-nav .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 0 20px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            margin-bottom: 20px;
        }

        .side-nav .logo-icon {
            width: 44px;
            height: 44px;
            background: linear-gradient(135deg, var(--gold), var(--gold-light));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            box-shadow: 0 4px 12px rgba(245,197,24,0.3);
            flex-shrink: 0;
        }

        .side-nav .logo-text {
            font-size: 18px;
            font-weight: 700;
            letter-spacing: 0.5px;
            line-height: 1.3;
        }

        .side-nav .logo-text small {
            display: block;
            font-size: 11px;
            font-weight: 400;
            color: rgba(255,255,255,0.6);
            letter-spacing: 0.3px;
            margin-top: 1px;
        }

        .side-nav .nav-label {
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: rgba(255,255,255,0.35);
            padding: 0 20px;
            margin-bottom: 8px;
        }

        .side-nav .nav-list {
            flex: 1;
            padding: 0 12px;
        }

        .side-nav .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255,255,255,0.7);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            margin-bottom: 2px;
        }

        .side-nav .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: rgba(255,255,255,0.4);
            transition: var(--transition);
        }

        .side-nav .nav-link:hover {
            background: rgba(255,255,255,0.08);
            color: #fff;
        }

        .side-nav .nav-link:hover i {
            color: var(--gold);
        }

        .side-nav .nav-link.active {
            background: linear-gradient(135deg, rgba(233,69,96,0.25), rgba(233,69,96,0.10));
            color: #fff;
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--accent);
        }

        .side-nav .nav-link.active i {
            color: var(--accent);
        }

        .side-nav .nav-footer {
            padding: 16px 20px 0;
            font-size: 12px;
            color: rgba(255,255,255,0.35);
            border-top: 1px solid rgba(255,255,255,0.06);
            margin-top: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .side-nav .nav-footer i {
            color: var(--gold);
            font-size: 14px;
        }

        /* ===== Main Content Area ===== */
        .main-wrapper {
            margin-left: var(--nav-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== Article Hero Banner ===== */
        .article-hero {
            position: relative;
            padding: 60px 0 50px;
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: var(--text-white);
            overflow: hidden;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,26,46,0.88) 0%, rgba(22,33,62,0.78) 100%);
            pointer-events: none;
        }

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

        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            margin-bottom: 20px;
        }

        .article-hero .breadcrumb a {
            color: rgba(255,255,255,0.7);
            transition: var(--transition);
        }

        .article-hero .breadcrumb a:hover {
            color: var(--gold);
        }

        .article-hero .breadcrumb .sep {
            color: rgba(255,255,255,0.3);
        }

        .article-hero .breadcrumb .current {
            color: var(--gold);
        }

        .article-hero h1 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.35;
            margin-bottom: 16px;
            max-width: 800px;
            letter-spacing: -0.3px;
        }

        .article-hero .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            font-size: 14px;
            color: rgba(255,255,255,0.65);
            align-items: center;
        }

        .article-hero .meta .tag {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            padding: 3px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .article-hero .meta i {
            margin-right: 5px;
            color: var(--gold);
        }

        /* ===== Article Content ===== */
        .article-content-section {
            padding: 50px 0 60px;
            background: var(--bg);
        }

        .article-content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }

        .article-main {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 40px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

        .article-main .content-body {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text);
        }

        .article-main .content-body p {
            margin-bottom: 20px;
        }

        .article-main .content-body h2 {
            font-size: 24px;
            margin: 40px 0 16px;
            color: var(--primary);
        }

        .article-main .content-body h3 {
            font-size: 20px;
            margin: 32px 0 12px;
            color: var(--primary);
        }

        .article-main .content-body ul,
        .article-main .content-body ol {
            margin: 0 0 20px 24px;
        }

        .article-main .content-body li {
            margin-bottom: 8px;
            list-style: disc;
        }

        .article-main .content-body img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }

        .article-main .content-body a {
            color: var(--accent);
            text-decoration: underline;
        }

        .article-main .content-body a:hover {
            color: var(--accent-dark);
        }

        .article-main .content-body blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 20px;
            margin: 24px 0;
            background: rgba(233,69,96,0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }

        .article-main .content-body .code-block {
            background: var(--primary);
            color: #e5e7eb;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            font-family: 'Fira Code', monospace;
            font-size: 14px;
            overflow-x: auto;
            margin: 24px 0;
            line-height: 1.6;
        }

        .article-nav {
            display: flex;
            justify-content: space-between;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
        }

        .article-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 20px;
            border-radius: var(--radius-sm);
            background: var(--bg);
            border: 1px solid var(--border);
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            transition: var(--transition);
        }

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

        .article-nav a i {
            font-size: 14px;
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }

        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

        .sidebar-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card h3 i {
            color: var(--accent);
            font-size: 18px;
        }

        .sidebar-card .related-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .sidebar-card .related-item {
            display: flex;
            gap: 12px;
            padding: 12px;
            border-radius: var(--radius-xs);
            background: var(--bg);
            transition: var(--transition);
            cursor: pointer;
            border: 1px solid transparent;
        }

        .sidebar-card .related-item:hover {
            background: var(--bg-card);
            border-color: var(--border);
            transform: translateX(4px);
            box-shadow: var(--shadow-sm);
        }

        .sidebar-card .related-item img {
            width: 70px;
            height: 55px;
            object-fit: cover;
            border-radius: 6px;
            flex-shrink: 0;
        }

        .sidebar-card .related-item .info {
            flex: 1;
            min-width: 0;
        }

        .sidebar-card .related-item .info h4 {
            font-size: 14px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 4px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .sidebar-card .related-item .info .date {
            font-size: 12px;
            color: var(--text-muted);
        }

        .sidebar-card .cta-mini {
            display: block;
            text-align: center;
            padding: 14px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
        }

        .sidebar-card .cta-mini:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }

        .sidebar-card .cta-mini i {
            margin-right: 6px;
        }

        .sidebar-card .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .sidebar-card .tag-cloud a {
            display: inline-block;
            padding: 5px 14px;
            background: var(--bg);
            border-radius: 20px;
            font-size: 13px;
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .sidebar-card .tag-cloud a:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            transform: translateY(-1px);
        }

        /* ===== FAQ Section ===== */
        .article-faq {
            padding: 50px 0;
            background: var(--bg-card);
            border-top: 1px solid var(--border-light);
        }

        .article-faq .section-title {
            text-align: center;
            margin-bottom: 40px;
        }

        .article-faq .section-title h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .article-faq .section-title p {
            color: var(--text-light);
            font-size: 16px;
        }

        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text);
            transition: var(--transition);
            list-style: none;
        }

        .faq-item summary::-webkit-details-marker { display: none; }

        .faq-item summary::before {
            content: '\f059';
            font-family: 'Font Awesome 6 Free';
            font-weight: 400;
            color: var(--accent);
            font-size: 18px;
            flex-shrink: 0;
        }

        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            margin-left: auto;
            font-size: 12px;
            color: var(--text-muted);
            transition: var(--transition);
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }

        .faq-item .answer {
            padding: 0 24px 20px 54px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ===== CTA Section ===== */
        .article-cta {
            padding: 60px 0;
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: var(--text-white);
            text-align: center;
            position: relative;
        }

        .article-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,26,46,0.85) 0%, rgba(22,33,62,0.75) 100%);
            pointer-events: none;
        }

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

        .article-cta h2 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .article-cta p {
            font-size: 17px;
            color: rgba(255,255,255,0.75);
            margin-bottom: 28px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .article-cta .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        .article-cta .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            border-radius: 50px;
            font-weight: 700;
            font-size: 17px;
            transition: var(--transition);
            box-shadow: 0 8px 25px rgba(233,69,96,0.35);
        }

        .article-cta .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(233,69,96,0.45);
        }

        .article-cta .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            background: rgba(255,255,255,0.12);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            font-size: 17px;
            border: 1px solid rgba(255,255,255,0.2);
            transition: var(--transition);
            backdrop-filter: blur(6px);
        }

        .article-cta .btn-secondary:hover {
            background: rgba(255,255,255,0.22);
            transform: translateY(-3px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.8);
            padding: 50px 0 30px;
            border-top: 1px solid rgba(255,255,255,0.05);
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .site-footer .footer-brand .logo-text {
            font-size: 20px;
            font-weight: 700;
            display: block;
            margin-bottom: 12px;
            color: #fff;
        }

        .site-footer .footer-brand p {
            font-size: 14px;
            color: rgba(255,255,255,0.55);
            line-height: 1.7;
            max-width: 300px;
        }

        .site-footer .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .site-footer .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255,255,255,0.55);
            padding: 4px 0;
            transition: var(--transition);
        }

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

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255,255,255,0.4);
        }

        .site-footer .footer-bottom a {
            color: var(--gold);
        }

        .site-footer .footer-bottom a:hover {
            text-decoration: underline;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-content-grid {
                grid-template-columns: 1fr;
            }
            .article-hero h1 { font-size: 28px; }
        }

        @media (max-width: 768px) {
            .side-nav {
                width: 100%;
                height: auto;
                position: relative;
                flex-direction: row;
                flex-wrap: wrap;
                padding: 12px 16px;
                border-right: none;
                border-bottom: 1px solid rgba(255,255,255,0.08);
                box-shadow: 0 4px 20px rgba(0,0,0,0.2);
            }

            .side-nav .logo {
                padding: 0;
                border-bottom: none;
                margin-bottom: 0;
                flex: 1;
            }

            .side-nav .logo-icon {
                width: 36px;
                height: 36px;
                font-size: 18px;
            }

            .side-nav .logo-text {
                font-size: 16px;
            }

            .side-nav .logo-text small {
                font-size: 10px;
            }

            .side-nav .nav-label { display: none; }

            .side-nav .nav-list {
                display: flex;
                flex-wrap: wrap;
                gap: 4px;
                padding: 8px 0 0;
                flex: 0 0 100%;
                order: 3;
            }

            .side-nav .nav-link {
                padding: 8px 14px;
                font-size: 14px;
                border-radius: var(--radius-xs);
            }

            .side-nav .nav-footer {
                display: none;
            }

            .main-wrapper {
                margin-left: 0;
            }

            .article-hero {
                padding: 36px 0 32px;
            }

            .article-hero h1 {
                font-size: 22px;
            }

            .article-hero .meta {
                font-size: 13px;
                gap: 10px 16px;
            }

            .article-main {
                padding: 24px 20px;
            }

            .article-main .content-body {
                font-size: 15px;
            }

            .article-nav {
                flex-direction: column;
                gap: 12px;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

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

            .article-faq .section-title h2 {
                font-size: 24px;
            }
        }

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

            .side-nav {
                padding: 10px 12px;
            }

            .side-nav .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }

            .side-nav .logo-text {
                font-size: 14px;
            }

            .side-nav .logo-text small {
                font-size: 9px;
            }

            .side-nav .nav-link {
                padding: 6px 10px;
                font-size: 12px;
            }

            .article-hero h1 {
                font-size: 20px;
            }

            .article-main {
                padding: 20px 16px;
            }

            .article-main .content-body {
                font-size: 14px;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .article-cta {
                padding: 40px 0;
            }

            .article-cta .btn-primary,
            .article-cta .btn-secondary {
                padding: 12px 28px;
                font-size: 15px;
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            .article-hero h1 {
                font-size: 18px;
            }

            .article-hero .meta {
                font-size: 12px;
                gap: 8px 12px;
            }

            .sidebar-card {
                padding: 16px;
            }

            .faq-item summary {
                padding: 14px 16px;
                font-size: 14px;
            }

            .faq-item .answer {
                padding: 0 16px 16px 44px;
                font-size: 14px;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --primary-dark: #0f0f1a;
            --accent: #f0c040;
            --accent-light: #f5d85a;
            --accent-dark: #d4a830;
            --accent-glow: rgba(240, 192, 64, 0.3);
            --bg-body: #f8f7f4;
            --bg-card: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-section-alt: #f0ede8;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a5a;
            --text-muted: #8888a0;
            --text-light: #f8f7f4;
            --text-accent: #d4a830;
            --border: #e0ddd8;
            --border-light: #f0ede8;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.12);
            --shadow-glow: 0 0 30px rgba(240, 192, 64, 0.15);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --sidebar-width: 240px;
            --header-height: 72px;
            --transition: 0.3s 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-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            min-height: 100vh;
            display: flex;
        }

        a {
            color: var(--primary);
            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;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Sidebar Navigation ===== */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: var(--primary);
            color: var(--text-light);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            border-right: 1px solid rgba(255, 255, 255, 0.06);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .side-nav .logo {
            padding: 28px 20px 20px;
            display: flex;
            align-items: center;
            gap: 14px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .side-nav .logo .logo-icon {
            width: 44px;
            height: 44px;
            background: var(--accent);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            box-shadow: 0 4px 12px rgba(240, 192, 64, 0.3);
            flex-shrink: 0;
        }

        .side-nav .logo .logo-text {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
            letter-spacing: 0.5px;
        }
        .side-nav .logo .logo-text small {
            display: block;
            font-size: 12px;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.6);
            letter-spacing: 0.3px;
        }

        .side-nav .nav-list {
            flex: 1;
            padding: 20px 12px;
            overflow-y: auto;
        }

        .side-nav .nav-label {
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: rgba(255, 255, 255, 0.35);
            padding: 8px 12px 12px;
        }

        .side-nav .nav-link {
            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: var(--transition);
            text-decoration: none;
            margin-bottom: 2px;
        }
        .side-nav .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            flex-shrink: 0;
        }
        .side-nav .nav-link:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .side-nav .nav-link.active {
            background: var(--accent);
            color: var(--primary);
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(240, 192, 64, 0.25);
        }
        .side-nav .nav-link.active i {
            color: var(--primary);
        }

        .side-nav .nav-footer {
            padding: 16px 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .side-nav .nav-footer i {
            color: var(--accent);
            font-size: 14px;
        }

        /* ===== Mobile Menu Toggle ===== */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            width: 44px;
            height: 44px;
            background: var(--primary);
            color: #fff;
            border-radius: 12px;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: var(--shadow-md);
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .mobile-toggle:hover {
            background: var(--primary-light);
            transform: scale(1.05);
        }
        .mobile-toggle .close-icon {
            display: none;
        }
        .mobile-toggle.open .menu-icon {
            display: none;
        }
        .mobile-toggle.open .close-icon {
            display: inline;
        }

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

        /* ===== Page Header / Banner ===== */
        .page-banner {
            position: relative;
            padding: 80px 0 60px;
            background: var(--primary);
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.92) 0%, rgba(22, 33, 62, 0.8) 100%);
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 40px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 1px;
            line-height: 1.2;
        }
        .page-banner h1 i {
            color: var(--accent);
            margin-right: 12px;
        }
        .page-banner p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 20px;
        }
        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
        }
        .page-banner .breadcrumb a:hover {
            color: var(--accent);
        }
        .page-banner .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.3);
        }
        .page-banner .breadcrumb .current {
            color: var(--accent);
        }

        /* ===== Sections General ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-light);
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
            line-height: 1.3;
        }
        .section-dark .section-title {
            color: #fff;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 600px;
            margin-bottom: 40px;
            line-height: 1.6;
        }
        .section-dark .section-subtitle {
            color: rgba(255, 255, 255, 0.65);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--accent-dark);
            background: rgba(240, 192, 64, 0.12);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
        }
        .section-dark .section-tag {
            background: rgba(240, 192, 64, 0.15);
            color: var(--accent);
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-grid.col-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid.col-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--accent);
        }
        .card .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
            background: var(--bg-section-alt);
        }
        .card .card-body {
            padding: 24px 24px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card .card-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--accent-dark);
            background: rgba(240, 192, 64, 0.12);
            padding: 3px 12px;
            border-radius: 12px;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .card .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .card .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }
        .card .card-footer {
            margin-top: 18px;
            padding-top: 16px;
            border-top: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .card .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-dark);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .card .card-link:hover {
            gap: 10px;
            color: var(--primary);
        }

        /* ===== Step / Timeline ===== */
        .step-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .step-item .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary);
            font-size: 22px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            box-shadow: 0 4px 16px rgba(240, 192, 64, 0.25);
        }
        .step-item .step-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .step-item .step-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Features / Icon Blocks ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: var(--accent);
        }
        .feature-card .fc-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: rgba(240, 192, 64, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--accent-dark);
            margin: 0 auto 18px;
            transition: var(--transition);
        }
        .feature-card:hover .fc-icon {
            background: var(--accent);
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(240, 192, 64, 0.25);
        }
        .feature-card .fc-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .feature-card .fc-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== 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-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--accent);
        }
        .faq-item .faq-q {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            gap: 16px;
            user-select: none;
            transition: var(--transition);
        }
        .faq-item .faq-q i {
            color: var(--accent-dark);
            font-size: 14px;
            transition: transform 0.3s;
            flex-shrink: 0;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }
        .faq-item .faq-a {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-a {
            display: block;
        }
        .faq-item .faq-a p {
            margin-bottom: 8px;
        }
        .faq-item .faq-a p:last-child {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            position: relative;
            overflow: hidden;
            padding: 72px 0;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 520px;
            margin: 0 auto 32px;
        }
        .cta-section .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
            line-height: 1.2;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            box-shadow: 0 4px 20px rgba(240, 192, 64, 0.3);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(240, 192, 64, 0.4);
            color: var(--primary);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.3);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 10px 22px;
            font-size: 14px;
        }

        /* ===== Tags / Badges ===== */
        .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .tag {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            background: var(--bg-card);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .tag:hover {
            border-color: var(--accent);
            color: var(--accent-dark);
            background: rgba(240, 192, 64, 0.06);
        }
        .tag-accent {
            background: var(--accent);
            color: var(--primary);
            border-color: var(--accent);
            font-weight: 600;
        }
        .tag-accent:hover {
            background: var(--accent-light);
            color: var(--primary);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
            margin-top: auto;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .site-footer .footer-brand .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            display: block;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .site-footer .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.7;
            max-width: 320px;
        }
        .site-footer .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .site-footer .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            padding: 5px 0;
            text-decoration: none;
            transition: var(--transition);
        }
        .site-footer .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 8px;
        }
        .site-footer .footer-bottom a {
            color: var(--accent);
            text-decoration: none;
        }
        .site-footer .footer-bottom a:hover {
            text-decoration: underline;
        }

        /* ===== Mobile Overlay ===== */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
            backdrop-filter: blur(4px);
        }
        .nav-overlay.active {
            display: block;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid.col-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .page-banner h1 {
                font-size: 32px;
            }
            .section-title {
                font-size: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
            }

            .mobile-toggle {
                display: flex;
            }

            .side-nav {
                transform: translateX(-100%);
                box-shadow: none;
                width: 280px;
            }
            .side-nav.open {
                transform: translateX(0);
                box-shadow: 0 0 60px rgba(0, 0, 0, 0.5);
            }

            .main-content {
                margin-left: 0;
            }

            .page-banner {
                padding: 60px 0 44px;
                min-height: 220px;
            }
            .page-banner h1 {
                font-size: 26px;
            }
            .page-banner p {
                font-size: 15px;
            }
            .page-banner .breadcrumb {
                font-size: 12px;
                flex-wrap: wrap;
            }

            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .section-subtitle {
                font-size: 15px;
            }

            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .card-grid.col-2 {
                grid-template-columns: 1fr;
            }
            .card-grid.col-4 {
                grid-template-columns: 1fr;
            }
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .step-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .cta-section h2 {
                font-size: 26px;
            }
            .cta-section .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 320px;
                justify-content: center;
            }

            .faq-item .faq-q {
                font-size: 14px;
                padding: 14px 18px;
            }
            .faq-item .faq-a {
                padding: 0 18px 14px;
                font-size: 14px;
            }

            .container {
                padding: 0 16px;
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 22px;
            }
            .page-banner p {
                font-size: 14px;
            }
            .section-title {
                font-size: 20px;
            }
            .card .card-body {
                padding: 18px 18px 22px;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .step-item {
                padding: 24px 18px;
            }
            .tag-group {
                gap: 6px;
            }
            .tag {
                font-size: 12px;
                padding: 4px 14px;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-up {
            animation: fadeUp 0.6s ease forwards;
        }
        .animate-fade-up:nth-child(2) {
            animation-delay: 0.1s;
        }
        .animate-fade-up:nth-child(3) {
            animation-delay: 0.2s;
        }
        .animate-fade-up:nth-child(4) {
            animation-delay: 0.3s;
        }
        .animate-fade-up:nth-child(5) {
            animation-delay: 0.4s;
        }
        .animate-fade-up:nth-child(6) {
            animation-delay: 0.5s;
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }