/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6366f1;
            --primary-light: #818cf8;
            --primary-dark: #4f46e5;
            --primary-bg: rgba(99, 102, 241, 0.08);
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --accent: #10b981;
            --bg-dark: #0f172a;
            --bg-dark-alt: #1e293b;
            --bg-light: #f8fafc;
            --bg-card: #ffffff;
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-light: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
            --shadow-md: 0 8px 28px rgba(0,0,0,0.07);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.10);
            --shadow-xl: 0 30px 70px rgba(0,0,0,0.14);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --spacing-section: 100px;
        }

        /* ===== 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-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; outline: none; border: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: clamp(2.2rem, 5.5vw, 4rem); }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.6rem); }
        h3 { font-size: clamp(1.2rem, 2.2vw, 1.6rem); }
        h4 { font-size: 1.15rem; }
        p { color: var(--text-secondary); }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 悬浮胶囊导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            padding: 14px 24px;
            pointer-events: none;
            transition: var(--transition);
        }
        .site-header .nav-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(255,255,255,0.82);
            backdrop-filter: blur(18px) saturate(180%);
            -webkit-backdrop-filter: blur(18px) saturate(180%);
            border-radius: 60px;
            padding: 0 28px;
            height: 58px;
            box-shadow: 0 4px 24px rgba(0,0,0,0.06), 0 1px 4px rgba(0,0,0,0.02);
            border: 1px solid rgba(255,255,255,0.5);
            pointer-events: auto;
            transition: var(--transition);
        }
        .site-header .nav-inner:hover {
            box-shadow: 0 8px 36px rgba(99,102,241,0.10), 0 2px 8px rgba(0,0,0,0.04);
        }
        .nav-logo {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .nav-logo i {
            font-size: 1.4rem;
            color: var(--primary);
            background: var(--primary-bg);
            padding: 8px;
            border-radius: 50%;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .nav-links a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(99,102,241,0.35);
        }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            padding: 6px 10px;
            border-radius: 40px;
            background: var(--bg-light);
            pointer-events: auto;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--border);
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: linear-gradient(135deg, #0f172a 0%, #1a2332 50%, #0f172a 100%);
            overflow: hidden;
            padding: calc(var(--header-height) + 40px) 0 80px;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.20;
            z-index: 0;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 200px;
            background: linear-gradient(to top, var(--bg-light) 0%, transparent 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .hero-content h1 {
            color: var(--text-light);
            margin-bottom: 20px;
            font-weight: 800;
            letter-spacing: -0.02em;
        }
        .hero-content h1 span {
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-content p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 32px;
            max-width: 520px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 18px rgba(99,102,241,0.35);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(99,102,241,0.40);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 12px rgba(99,102,241,0.30);
        }
        .btn-ghost {
            background: rgba(255,255,255,0.10);
            color: var(--text-light);
            border: 1px solid rgba(255,255,255,0.15);
            backdrop-filter: blur(6px);
        }
        .btn-ghost:hover {
            background: rgba(255,255,255,0.18);
            border-color: rgba(255,255,255,0.30);
            transform: translateY(-2px);
        }
        .btn-ghost:active {
            transform: translateY(0);
        }
        .hero-visual {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .hero-visual .img-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-xl);
            transform: perspective(1000px) rotateY(-3deg) rotateX(2deg);
            transition: var(--transition);
            border: 1px solid rgba(255,255,255,0.08);
        }
        .hero-visual .img-wrap:hover {
            transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
            box-shadow: 0 40px 80px rgba(0,0,0,0.30);
        }
        .hero-visual img {
            width: 100%;
            max-width: 520px;
            height: auto;
            display: block;
        }
        .hero-badge {
            position: absolute;
            top: -16px;
            right: -16px;
            background: var(--secondary);
            color: #1e293b;
            padding: 8px 20px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 700;
            box-shadow: 0 4px 18px rgba(245,158,11,0.35);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-alt {
            background: var(--bg-card);
        }
        .section-dark {
            background: var(--bg-dark);
        }
        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }
        .section-header h2 {
            margin-bottom: 14px;
        }
        .section-header p {
            max-width: 620px;
            margin: 0 auto;
            font-size: 1.08rem;
            color: var(--text-muted);
        }
        .section-tag {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.82rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        /* ===== 特色卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 36px 30px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-bg);
        }
        .feature-card .icon {
            width: 64px;
            height: 64px;
            border-radius: 18px;
            background: var(--primary-bg);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            margin: 0 auto 20px;
            transition: var(--transition);
        }
        .feature-card:hover .icon {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }
        .feature-card h3 {
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-bg);
        }
        .category-card .cat-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            transition: var(--transition);
        }
        .category-card:hover .cat-img {
            transform: scale(1.03);
        }
        .category-card .cat-body {
            padding: 24px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card .cat-body h3 {
            margin-bottom: 8px;
        }
        .category-card .cat-body p {
            font-size: 0.93rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex: 1;
        }
        .category-card .cat-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            color: var(--primary);
            font-size: 0.95rem;
        }
        .category-card .cat-link i {
            transition: var(--transition);
            font-size: 0.8rem;
        }
        .category-card .cat-link:hover i {
            transform: translateX(4px);
        }
        .cat-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(15,23,42,0.75);
            backdrop-filter: blur(6px);
            color: #fff;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        /* ===== 最新资讯列表 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-bg);
        }
        .news-card .news-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }
        .news-card .news-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .news-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .news-card .news-meta .tag {
            background: var(--primary-bg);
            color: var(--primary);
            padding: 2px 12px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.75rem;
        }
        .news-card .news-body h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .news-card .news-foot {
            padding: 14px 24px;
            border-top: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .news-card .news-foot a {
            color: var(--primary);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .news-card .news-foot a i {
            font-size: 0.75rem;
        }
        .news-card .news-foot a:hover i {
            transform: translateX(3px);
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 50px 20px;
            color: var(--text-muted);
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
        }
        .news-empty i {
            font-size: 2.4rem;
            margin-bottom: 16px;
            color: var(--text-muted);
            opacity: 0.5;
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.95rem;
            box-shadow: 0 4px 14px rgba(99,102,241,0.30);
        }
        .step-card .step-icon {
            font-size: 2rem;
            color: var(--primary);
            margin: 8px 0 16px;
        }
        .step-card h4 {
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .step-connector {
            display: none;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-bg);
        }
        .faq-question {
            padding: 20px 26px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            color: var(--text-primary);
        }
        .faq-question i {
            color: var(--text-muted);
            transition: var(--transition);
            font-size: 0.9rem;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 26px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.75;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 26px 22px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2332 100%);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta-section h2 {
            color: var(--text-light);
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.6);
            max-width: 560px;
            margin: 0 auto 32px;
            font-size: 1.08rem;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.6);
            padding: 48px 0 32px;
            border-top: 1px solid rgba(255,255,255,0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .nav-logo {
            color: var(--text-light);
            margin-bottom: 14px;
        }
        .footer-brand .nav-logo i {
            background: rgba(255,255,255,0.08);
            color: var(--primary-light);
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.45);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-col h4 {
            color: var(--text-light);
            font-size: 0.95rem;
            margin-bottom: 16px;
            font-weight: 700;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.5);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
            transform: translateX(3px);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            :root { --spacing-section: 70px; }
            .hero-grid { grid-template-columns: 1fr; gap: 40px; text-align: center; }
            .hero-content p { margin: 0 auto 32px; }
            .hero-actions { justify-content: center; }
            .hero-visual .img-wrap { transform: none; max-width: 480px; margin: 0 auto; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .news-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            :root { --spacing-section: 56px; --header-height: 64px; }
            .site-header { padding: 10px 16px; }
            .site-header .nav-inner { padding: 0 18px; height: 52px; border-radius: 40px; }
            .nav-logo { font-size: 1.05rem; }
            .nav-logo i { font-size: 1.1rem; padding: 6px; }
            .nav-links { display: none; }
            .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 64px; left: 16px; right: 16px; background: rgba(255,255,255,0.96); backdrop-filter: blur(18px); border-radius: var(--radius-md); padding: 16px; box-shadow: var(--shadow-lg); border: 1px solid var(--border); gap: 4px; }
            .nav-links.open a { width: 100%; text-align: center; padding: 12px 18px; }
            .nav-toggle { display: block; }
            .hero { min-height: auto; padding: 100px 0 60px; }
            .hero-content h1 { font-size: clamp(1.8rem, 7vw, 2.6rem); }
            .hero-content p { font-size: 1rem; }
            .features-grid { grid-template-columns: 1fr; gap: 20px; }
            .category-grid { grid-template-columns: 1fr; gap: 20px; }
            .news-grid { grid-template-columns: 1fr; gap: 20px; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; text-align: center; }
            .footer-brand p { margin: 0 auto; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section-header { margin-bottom: 36px; }
            .btn { padding: 12px 24px; font-size: 0.92rem; }
            .cta-section { padding: 56px 0; }
        }

        @media (max-width: 520px) {
            .site-header .nav-inner { padding: 0 14px; height: 48px; }
            .nav-logo { font-size: 0.95rem; }
            .nav-logo i { font-size: 0.95rem; padding: 5px; }
            .hero { padding: 80px 0 40px; }
            .steps-grid { grid-template-columns: 1fr; }
            .section { padding: 40px 0; }
            .feature-card { padding: 26px 20px; }
            .category-card .cat-body { padding: 18px 20px; }
            .news-card .news-body { padding: 18px 20px; }
            .faq-question { padding: 16px 20px; font-size: 0.92rem; }
            .faq-answer { padding: 0 20px; font-size: 0.88rem; }
            .faq-item.active .faq-answer { padding: 0 20px 18px; }
        }

        @media (min-width: 769px) {
            .nav-links { display: flex !important; }
        }

        /* ===== 辅助 ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
        .focus-ring:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 3px; border-radius: 4px; }
        a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; border-radius: 4px; }

/* roulang page: article */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --secondary: #0f172a;
    --accent: #f59e0b;
    --bg-body: #f8fafc;
    --bg-card: #ffffff;
    --bg-dark: #0f172a;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-light: #94a3b8;
    --text-white: #ffffff;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --radius: 16px;
    --radius-sm: 8px;
    --radius-lg: 24px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
    --shadow-xl: 0 24px 60px rgba(0,0,0,0.16);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --container: 1200px;
    --spacing-section: 80px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-sans); background: var(--bg-body); color: var(--text-primary); line-height: 1.6; font-size: 16px; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea { font-family: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

@media (max-width: 768px) {
    :root { --spacing-section: 48px; }
    .container { padding: 0 16px; }
}

.site-header {
    position: sticky; top: 16px; z-index: 1000; padding: 0 24px;
}
.nav-inner {
    max-width: var(--container); margin: 0 auto; background: rgba(255,255,255,0.92); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-radius: 60px; padding: 8px 20px; display: flex; align-items: center; justify-content: space-between;
    box-shadow: 0 4px 30px rgba(0,0,0,0.08); border: 1px solid rgba(255,255,255,0.5);
}
.nav-logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; color: var(--text-primary); text-decoration: none; }
.nav-logo i { color: var(--primary); font-size: 24px; }
.nav-logo span { background: linear-gradient(135deg, var(--primary), #7c3aed); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav-logo:hover { opacity: 0.85; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a { padding: 8px 18px; border-radius: 40px; font-size: 15px; font-weight: 500; color: var(--text-secondary); transition: var(--transition); text-decoration: none; position: relative; }
.nav-links a:hover { color: var(--primary); background: var(--primary-light); }
.nav-links a.active { color: var(--text-white); background: var(--primary); box-shadow: 0 4px 12px rgba(37,99,235,0.3); }
.nav-toggle { display: none; width: 40px; height: 40px; border-radius: 50%; background: var(--primary-light); color: var(--primary); font-size: 18px; align-items: center; justify-content: center; border: none; cursor: pointer; }

@media (max-width: 768px) {
    .site-header { top: 8px; padding: 0 12px; }
    .nav-inner { padding: 6px 14px; border-radius: 40px; }
    .nav-links { display: none; position: absolute; top: calc(100% + 8px); left: 12px; right: 12px; background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); border-radius: 20px; padding: 16px; flex-direction: column; gap: 8px; box-shadow: var(--shadow-lg); border: 1px solid var(--border); }
    .nav-links.open { display: flex; }
    .nav-links a { width: 100%; text-align: center; padding: 12px; font-size: 16px; }
    .nav-toggle { display: flex; }
}

.page-banner {
    position: relative; padding: 120px 0 80px; margin-top: -80px; overflow: hidden;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    min-height: 320px; 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: 0.12; mix-blend-mode: overlay;
}
.page-banner::after {
    content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 120px;
    background: linear-gradient(to top, var(--bg-body), transparent);
}
.banner-inner { position: relative; z-index: 2; text-align: center; }
.banner-inner .breadcrumb { display: flex; align-items: center; justify-content: center; gap: 8px; margin-bottom: 20px; font-size: 14px; color: var(--text-light); }
.banner-inner .breadcrumb a { color: var(--text-light); text-decoration: none; }
.banner-inner .breadcrumb a:hover { color: var(--primary); }
.banner-inner .breadcrumb i { font-size: 12px; color: var(--text-light); }
.banner-inner h1 { font-size: 42px; font-weight: 800; color: var(--text-white); max-width: 800px; margin: 0 auto 16px; line-height: 1.25; }
.banner-inner .meta { display: flex; align-items: center; justify-content: center; gap: 24px; flex-wrap: wrap; color: var(--text-light); font-size: 15px; }
.banner-inner .meta span { display: flex; align-items: center; gap: 6px; }
.banner-inner .meta i { color: var(--primary); }
.banner-inner .category-badge { display: inline-block; padding: 4px 16px; background: rgba(37,99,235,0.15); color: var(--primary); border-radius: 40px; font-size: 13px; font-weight: 600; letter-spacing: 0.3px; }

@media (max-width: 768px) {
    .page-banner { padding: 100px 0 60px; min-height: 260px; }
    .banner-inner h1 { font-size: 26px; }
    .banner-inner .meta { gap: 12px; font-size: 13px; flex-direction: column; }
}

.article-section { padding: 60px 0 var(--spacing-section); }
.article-layout { display: grid; grid-template-columns: 1fr 360px; gap: 48px; align-items: start; }

@media (max-width: 992px) {
    .article-layout { grid-template-columns: 1fr; gap: 40px; }
}

.article-main { background: var(--bg-card); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.article-body { padding: 48px; }
.article-body .content { font-size: 17px; line-height: 1.8; color: var(--text-secondary); }
.article-body .content p { margin-bottom: 20px; }
.article-body .content h2 { font-size: 28px; margin: 40px 0 16px; color: var(--text-primary); }
.article-body .content h3 { font-size: 22px; margin: 32px 0 12px; color: var(--text-primary); }
.article-body .content ul, .article-body .content ol { margin-bottom: 20px; padding-left: 24px; }
.article-body .content li { margin-bottom: 8px; }
.article-body .content ul li { list-style: disc; }
.article-body .content ol li { list-style: decimal; }
.article-body .content blockquote { border-left: 4px solid var(--primary); background: var(--primary-light); padding: 16px 24px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin: 24px 0; font-style: italic; }
.article-body .content img { border-radius: var(--radius-sm); margin: 24px 0; box-shadow: var(--shadow-sm); }
.article-body .content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-body .content a:hover { color: var(--primary-dark); }

.article-footer-bar { padding: 24px 48px; border-top: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.article-tags { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.article-tags span { font-size: 14px; color: var(--text-secondary); font-weight: 600; }
.article-tags .tag { display: inline-block; padding: 4px 14px; background: var(--primary-light); color: var(--primary); border-radius: 40px; font-size: 13px; font-weight: 500; }
.article-share { display: flex; align-items: center; gap: 8px; }
.article-share span { font-size: 14px; color: var(--text-secondary); }
.article-share a { width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; border-radius: 50%; background: var(--border-light); color: var(--text-secondary); transition: var(--transition); }
.article-share a:hover { background: var(--primary); color: var(--text-white); }

@media (max-width: 768px) {
    .article-body { padding: 24px; }
    .article-body .content { font-size: 15px; }
    .article-body .content h2 { font-size: 22px; }
    .article-body .content h3 { font-size: 18px; }
    .article-footer-bar { padding: 16px 24px; flex-direction: column; align-items: flex-start; }
}

.article-sidebar { display: flex; flex-direction: column; gap: 32px; }
.sidebar-card { background: var(--bg-card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 28px; }
.sidebar-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid var(--primary); display: flex; align-items: center; gap: 8px; }
.sidebar-card h3 i { color: var(--primary); }

.sidebar-news-list { display: flex; flex-direction: column; gap: 12px; }
.sidebar-news-list a { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--border-light); transition: var(--transition); text-decoration: none; }
.sidebar-news-list a:last-child { border-bottom: none; }
.sidebar-news-list a:hover { padding-left: 8px; }
.sidebar-news-list .thumb { width: 64px; height: 48px; border-radius: 8px; object-fit: cover; flex-shrink: 0; background: var(--border-light); }
.sidebar-news-list .info { flex: 1; }
.sidebar-news-list .info .title { font-size: 14px; font-weight: 600; color: var(--text-primary); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; line-height: 1.4; }
.sidebar-news-list .info .date { font-size: 12px; color: var(--text-light); margin-top: 4px; display: block; }

.sidebar-cat-list { display: flex; flex-direction: column; gap: 4px; }
.sidebar-cat-list a { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: var(--radius-sm); color: var(--text-secondary); font-size: 15px; transition: var(--transition); text-decoration: none; }
.sidebar-cat-list a:hover { background: var(--primary-light); color: var(--primary); }
.sidebar-cat-list a i { font-size: 14px; color: var(--primary); }
.sidebar-cat-list a.active { background: var(--primary); color: var(--text-white); }
.sidebar-cat-list a.active i { color: var(--text-white); }

.sidebar-cta { background: linear-gradient(135deg, var(--primary), #7c3aed); border-radius: var(--radius); padding: 32px 28px; text-align: center; color: var(--text-white); }
.sidebar-cta h4 { font-size: 20px; font-weight: 700; margin-bottom: 8px; color: var(--text-white); }
.sidebar-cta p { font-size: 14px; opacity: 0.9; margin-bottom: 20px; }
.sidebar-cta .btn-white { display: inline-block; padding: 12px 32px; background: var(--text-white); color: var(--primary); border-radius: 40px; font-weight: 600; font-size: 15px; transition: var(--transition); box-shadow: 0 4px 16px rgba(0,0,0,0.15); text-decoration: none; }
.sidebar-cta .btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); }

@media (max-width: 992px) {
    .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
}

@media (max-width: 640px) {
    .article-sidebar { grid-template-columns: 1fr; }
}

.not-found-card { background: var(--bg-card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 80px 48px; text-align: center; }
.not-found-card i { font-size: 64px; color: var(--text-light); margin-bottom: 24px; }
.not-found-card h2 { font-size: 28px; margin-bottom: 12px; }
.not-found-card p { color: var(--text-secondary); margin-bottom: 24px; font-size: 16px; }
.not-found-card .btn-primary { display: inline-block; padding: 14px 36px; background: var(--primary); color: var(--text-white); border-radius: 40px; font-weight: 600; font-size: 16px; transition: var(--transition); text-decoration: none; }
.not-found-card .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.3); }

.site-footer {
    background: var(--bg-dark); color: var(--text-light); padding: 64px 0 0; position: relative; overflow: hidden;
}
.site-footer::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: linear-gradient(90deg, var(--primary), #7c3aed, var(--accent)); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand .nav-logo { color: var(--text-white); margin-bottom: 16px; }
.footer-brand .nav-logo span { -webkit-text-fill-color: var(--text-white); background: none; }
.footer-brand p { font-size: 14px; line-height: 1.7; opacity: 0.7; max-width: 380px; }
.footer-col h4 { color: var(--text-white); font-size: 16px; font-weight: 600; margin-bottom: 20px; position: relative; padding-bottom: 10px; }
.footer-col h4::after { content: ''; position: absolute; bottom: 0; left: 0; width: 32px; height: 2px; background: var(--primary); border-radius: 2px; }
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col ul li a { color: var(--text-light); font-size: 14px; opacity: 0.7; transition: var(--transition); display: flex; align-items: center; gap: 6px; text-decoration: none; }
.footer-col ul li a:hover { opacity: 1; color: var(--text-white); padding-left: 4px; }
.footer-col ul li a i { font-size: 12px; color: var(--primary); }
.footer-bottom { padding: 24px 0; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 13px; opacity: 0.6; }

@media (max-width: 768px) {
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .site-footer { padding: 40px 0 0; }
}

@media (max-width: 520px) {
    .page-banner { padding: 80px 0 48px; min-height: 220px; }
    .banner-inner h1 { font-size: 22px; }
    .article-body { padding: 16px; }
    .article-body .content { font-size: 14px; }
    .article-body .content h2 { font-size: 20px; }
    .article-body .content h3 { font-size: 16px; }
    .not-found-card { padding: 40px 24px; }
    .not-found-card h2 { font-size: 22px; }
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #6c5ce7;
            --primary-dark: #5a4bd1;
            --primary-light: #a29bfe;
            --primary-bg: #f0eeff;
            --secondary: #00cec9;
            --secondary-dark: #00b5b0;
            --accent: #fd79a8;
            --dark: #2d3436;
            --darker: #1a1a2e;
            --text: #2d3436;
            --text-light: #636e72;
            --text-lighter: #b2bec3;
            --bg: #ffffff;
            --bg-alt: #f8f9fa;
            --bg-card: #ffffff;
            --border: #e0e0e0;
            --border-light: #f0f0f0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --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 60px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 30px 80px rgba(0, 0, 0, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--nav-height);
        }

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        button:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: var(--dark);
            font-weight: 700;
        }

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

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.06);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
            transition: var(--transition);
        }

        .nav-inner {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: -0.5px;
            transition: var(--transition);
        }
        .nav-logo i {
            font-size: 26px;
            color: var(--primary);
        }
        .nav-logo span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-logo:hover {
            opacity: 0.85;
            transform: scale(1.02);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            padding: 8px 20px;
            border-radius: 100px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
            letter-spacing: 0.2px;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .nav-links a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 15px rgba(108, 92, 231, 0.35);
        }
        .nav-links a.active:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 20px rgba(108, 92, 231, 0.45);
        }

        .nav-toggle {
            display: none;
            font-size: 24px;
            color: var(--dark);
            padding: 8px 12px;
            border-radius: var(--radius-xs);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-alt);
        }
        .nav-toggle:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== Banner / Hero ===== */
        .page-banner {
            position: relative;
            padding: 100px 0 80px;
            background: linear-gradient(135deg, var(--darker) 0%, #2d1b69 50%, var(--dark) 100%);
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 80%, rgba(108, 92, 231, 0.25) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 20%, rgba(0, 206, 201, 0.15) 0%, transparent 50%);
        }
        .banner-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .banner-content .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
        }
        .banner-content .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }
        .banner-content .breadcrumb a:hover {
            color: #fff;
        }
        .banner-content .breadcrumb i {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
        }
        .banner-content h1 {
            font-size: 48px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -1px;
            text-shadow: 0 2px 30px rgba(0, 0, 0, 0.3);
        }
        .banner-content h1 i {
            color: var(--secondary);
            margin-right: 8px;
        }
        .banner-content p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .banner-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-top: 24px;
        }
        .banner-tags .tag {
            padding: 6px 18px;
            border-radius: 100px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.12);
            color: rgba(255, 255, 255, 0.85);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(4px);
            transition: var(--transition);
        }
        .banner-tags .tag:hover {
            background: rgba(255, 255, 255, 0.2);
            color: #fff;
        }
        .banner-tags .tag i {
            margin-right: 6px;
            font-size: 12px;
            color: var(--secondary);
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--darker);
            color: rgba(255, 255, 255, 0.85);
        }
        .section-dark h2,
        .section-dark h3 {
            color: #fff;
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px;
        }
        .section-header .subtitle {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-bg);
            padding: 4px 16px;
            border-radius: 100px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-header h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-light);
            line-height: 1.7;
        }
        .section-dark .section-header .subtitle {
            background: rgba(108, 92, 231, 0.2);
            color: var(--primary-light);
        }
        .section-dark .section-header h2 {
            color: #fff;
        }
        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== Cards Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid-4 {
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .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);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .card .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 18px;
            background: var(--primary-bg);
            color: var(--primary);
            transition: var(--transition);
        }
        .card:hover .card-icon {
            background: var(--primary);
            color: #fff;
        }
        .card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--dark);
        }
        .card p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
        }
        .card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 14px;
            font-weight: 600;
            font-size: 14px;
            color: var(--primary);
            transition: var(--transition);
        }
        .card .card-link i {
            font-size: 12px;
            transition: var(--transition);
        }
        .card .card-link:hover {
            color: var(--primary-dark);
            gap: 10px;
        }

        /* ===== Steps / Timeline ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            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-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(108, 92, 231, 0.3);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card .step-icon {
            font-size: 36px;
            color: var(--primary);
            margin-bottom: 14px;
            margin-top: 8px;
        }
        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== Content / Article ===== */
        .content-layout {
            display: grid;
            grid-template-columns: 1fr 360px;
            gap: 48px;
            align-items: start;
        }
        .content-main {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 40px 36px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .content-main h2 {
            font-size: 28px;
            font-weight: 800;
            margin: 40px 0 16px;
            padding-bottom: 12px;
            border-bottom: 3px solid var(--primary-bg);
        }
        .content-main h2:first-child {
            margin-top: 0;
        }
        .content-main h3 {
            font-size: 22px;
            font-weight: 700;
            margin: 28px 0 12px;
        }
        .content-main p {
            font-size: 16px;
            color: var(--text);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .content-main ul,
        .content-main ol {
            margin: 12px 0 20px;
            padding-left: 24px;
        }
        .content-main li {
            font-size: 15px;
            color: var(--text);
            line-height: 1.8;
            margin-bottom: 6px;
            list-style: disc;
        }
        .content-main .tip-box {
            background: var(--primary-bg);
            border-left: 4px solid var(--primary);
            padding: 20px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 20px 0;
        }
        .content-main .tip-box i {
            color: var(--primary);
            margin-right: 8px;
        }
        .content-main .tip-box p {
            margin-bottom: 0;
            font-size: 15px;
        }

        .content-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .sidebar-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary-bg);
        }
        .sidebar-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-light);
            transition: var(--transition);
        }
        .sidebar-card ul li a i {
            color: var(--primary);
            font-size: 12px;
        }
        .sidebar-card ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            color: #fff;
        }
        .sidebar-cta h4 {
            color: #fff;
            font-size: 20px;
            margin-bottom: 10px;
        }
        .sidebar-cta p {
            font-size: 14px;
            opacity: 0.9;
            margin-bottom: 18px;
        }
        .sidebar-cta .btn {
            background: #fff;
            color: var(--primary);
            border: none;
        }
        .sidebar-cta .btn:hover {
            background: var(--secondary);
            color: #fff;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 100px;
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            border: 2px solid transparent;
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(108, 92, 231, 0.35);
        }
        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-light {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.3);
        }
        .btn-light:hover {
            background: rgba(255, 255, 255, 0.25);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 13px;
        }
        .btn-lg {
            padding: 16px 40px;
            font-size: 17px;
        }

        .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 28px;
            justify-content: center;
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            text-align: center;
            padding: 32px 20px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }
        .stat-card .stat-number {
            font-size: 42px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .stat-card .stat-number i {
            color: var(--secondary);
            font-size: 32px;
            margin-right: 6px;
        }
        .stat-card .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 6px;
        }

        /* ===== 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(--primary-light);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            background: transparent;
            text-align: left;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question i {
            font-size: 14px;
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-question:hover {
            background: var(--bg-alt);
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 50%, #2d1b69 100%);
            padding: 80px 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;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 38px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-group {
            justify-content: center;
        }

        /* ===== Tags ===== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 13px;
            font-weight: 500;
            background: var(--primary-bg);
            color: var(--primary);
            transition: var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
        }
        .tag i {
            font-size: 12px;
        }

        /* ===== Image Showcase ===== */
        .img-showcase {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin: 24px 0;
        }
        .img-showcase figure {
            border-radius: var(--radius-sm);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .img-showcase figure:hover {
            transform: scale(1.01);
            box-shadow: var(--shadow-md);
        }
        .img-showcase figcaption {
            padding: 12px 16px;
            font-size: 14px;
            color: var(--text-light);
            background: var(--bg-alt);
            text-align: center;
            font-weight: 500;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--darker);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .nav-logo {
            color: #fff;
            margin-bottom: 14px;
            display: inline-flex;
        }
        .footer-brand .nav-logo span {
            background: linear-gradient(135deg, #fff, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 18px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .footer-col ul li a i {
            font-size: 12px;
            color: var(--primary-light);
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom span:last-child {
            color: var(--primary-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .content-layout {
                grid-template-columns: 1fr;
            }
            .content-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
            }
            .banner-content h1 {
                font-size: 38px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
                border-top: 1px solid var(--border-light);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 20px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-toggle {
                display: block;
            }

            .page-banner {
                padding: 80px 0 60px;
                min-height: 280px;
            }
            .banner-content h1 {
                font-size: 30px;
            }
            .banner-content p {
                font-size: 16px;
            }

            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 28px;
            }
            .section-header p {
                font-size: 15px;
            }

            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .card-grid-2 {
                grid-template-columns: 1fr;
            }
            .card-grid-4 {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-card .stat-number {
                font-size: 32px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .content-sidebar {
                grid-template-columns: 1fr;
            }
            .content-main {
                padding: 24px 20px;
            }
            .content-main h2 {
                font-size: 24px;
            }
            .img-showcase {
                grid-template-columns: 1fr;
            }

            .cta-section h2 {
                font-size: 28px;
            }
            .cta-section p {
                font-size: 16px;
            }
            .btn-lg {
                padding: 14px 32px;
                font-size: 15px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .nav-inner {
                padding: 0 16px;
            }
            .banner-content h1 {
                font-size: 24px;
            }
            .banner-content p {
                font-size: 14px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .card-grid-4 {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card {
                padding: 20px 12px;
            }
            .stat-card .stat-number {
                font-size: 28px;
            }
            .faq-question {
                font-size: 14px;
                padding: 16px 18px;
            }
            .faq-answer {
                font-size: 14px;
            }
            .btn-group {
                flex-direction: column;
                align-items: stretch;
            }
            .btn {
                text-align: center;
                justify-content: center;
            }
            .banner-tags .tag {
                font-size: 12px;
                padding: 4px 14px;
            }
        }

        /* ===== Back to Top ===== */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 20px rgba(108, 92, 231, 0.4);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: var(--transition);
            z-index: 999;
            border: none;
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-to-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(108, 92, 231, 0.5);
        }
        @media (max-width: 520px) {
            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 16px;
            }
        }