/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --clr-primary: #0c1222;
            --clr-primary-light: #1a2332;
            --clr-accent: #2563eb;
            --clr-accent-hover: #1d4ed8;
            --clr-accent-light: #dbeafe;
            --clr-purple: #7c3aed;
            --clr-gold: #f59e0b;
            --clr-gold-light: #fef3c7;
            --clr-text: #1e293b;
            --clr-text-light: #64748b;
            --clr-text-white: #f1f5f9;
            --clr-bg: #ffffff;
            --clr-bg-alt: #f8fafc;
            --clr-bg-dark: #0c1222;
            --clr-border: #e2e8f0;
            --clr-border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12), 0 4px 16px rgba(0,0,0,0.06);
            --shadow-xl: 0 24px 60px rgba(0,0,0,0.16);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-w: 1200px;
            --header-h: 72px;
        }

        /* ===== 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(--clr-text);
            background: var(--clr-bg);
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--clr-accent); outline-offset: 2px; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 600; color: var(--clr-primary); }
        h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
        h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); }
        p { margin-bottom: 0.8em; }
        .container {
            width: 100%;
            max-width: var(--max-w);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .container-narrow { max-width: 880px; }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 12px 28px;
            border-radius: 50px;
            transition: all var(--transition);
            white-space: nowrap;
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--clr-accent);
            color: #fff;
            border-color: var(--clr-accent);
        }
        .btn-primary:hover {
            background: var(--clr-accent-hover);
            border-color: var(--clr-accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.25);
        }
        .btn-outline {
            background: transparent;
            color: var(--clr-text-white);
            border-color: rgba(255,255,255,0.4);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.08);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-gold {
            background: var(--clr-gold);
            color: #0c1222;
            border-color: var(--clr-gold);
        }
        .btn-gold:hover {
            background: #d97706;
            border-color: #d97706;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.3);
        }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }

        /* ===== 标签 ===== */
        .tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 500;
            padding: 4px 14px;
            border-radius: 50px;
            background: var(--clr-accent-light);
            color: var(--clr-accent);
            letter-spacing: 0.02em;
        }
        .tag-gold {
            background: var(--clr-gold-light);
            color: #b45309;
        }

        /* ===== 徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8rem;
            font-weight: 500;
            padding: 6px 16px;
            border-radius: 50px;
            background: rgba(255,255,255,0.12);
            color: var(--clr-text-white);
            backdrop-filter: blur(4px);
        }
        .badge-solid {
            background: var(--clr-accent);
            color: #fff;
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--clr-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--clr-border);
            transition: all var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .card-body { padding: 28px 24px; }
        .card-image { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }

        /* ===== 板块间距 ===== */
        .section { padding: 80px 0; }
        .section-dark { background: var(--clr-bg-dark); color: var(--clr-text-white); }
        .section-alt { background: var(--clr-bg-alt); }
        .section-title {
            text-align: center;
            margin-bottom: 16px;
        }
        .section-subtitle {
            text-align: center;
            color: var(--clr-text-light);
            max-width: 640px;
            margin: 0 auto 48px;
            font-size: 1.05rem;
        }
        .section-dark .section-subtitle { color: rgba(255,255,255,0.6); }

        /* ===== Header / 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-h);
            background: rgba(12, 18, 34, 0.92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            z-index: 1000;
            transition: background var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.01em;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i { color: var(--clr-gold); font-size: 1.3rem; }
        .logo span { color: var(--clr-gold); }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-list a {
            font-size: 0.92rem;
            font-weight: 500;
            color: rgba(255,255,255,0.7);
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--clr-gold);
            border-radius: 2px;
            transition: width var(--transition);
        }
        .nav-list a:hover { color: #fff; }
        .nav-list a:hover::after { width: 100%; }
        .nav-list a.active { color: #fff; }
        .nav-list a.active::after { width: 100%; background: var(--clr-gold); }
        .nav-cta {
            background: var(--clr-gold);
            color: #0c1222 !important;
            padding: 8px 22px !important;
            border-radius: 50px;
            font-weight: 600;
            transition: all var(--transition);
        }
        .nav-cta::after { display: none !important; }
        .nav-cta:hover { background: #d97706; transform: translateY(-1px); }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            color: #fff;
            font-size: 1.5rem;
            padding: 4px;
            background: none;
            border: none;
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--clr-bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding-top: var(--header-h);
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(12,18,34,0.88) 0%, rgba(12,18,34,0.60) 60%, rgba(12,18,34,0.30) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 740px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--clr-gold);
            background: rgba(245,158,11,0.12);
            padding: 8px 20px;
            border-radius: 50px;
            margin-bottom: 24px;
            border: 1px solid rgba(245,158,11,0.20);
        }
        .hero h1 {
            color: #fff;
            font-weight: 700;
            line-height: 1.15;
            margin-bottom: 20px;
        }
        .hero h1 span { color: var(--clr-gold); }
        .hero p {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.75);
            max-width: 580px;
            margin-bottom: 36px;
            line-height: 1.8;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 56px;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.08);
        }
        .hero-stat h4 { color: #fff; font-size: 1.8rem; font-weight: 700; }
        .hero-stat h4 i { color: var(--clr-gold); font-size: 1.2rem; margin-right: 4px; }
        .hero-stat p { color: rgba(255,255,255,0.5); font-size: 0.85rem; margin: 0; }

        /* ===== 平台简介 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .intro-image img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
        .intro-text h2 { margin-bottom: 20px; }
        .intro-text p { color: var(--clr-text-light); font-size: 1.02rem; }
        .intro-features { margin-top: 24px; display: grid; gap: 12px; }
        .intro-features li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.95rem;
            color: var(--clr-text);
        }
        .intro-features li i { color: var(--clr-accent); font-size: 1rem; width: 20px; }

        /* ===== 服务特色 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 28px;
        }
        .feature-card {
            background: var(--clr-bg);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            border: 1px solid var(--clr-border);
            transition: all var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
            border-color: var(--clr-accent);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            background: var(--clr-accent-light);
            color: var(--clr-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin: 0 auto 20px;
            transition: all var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: var(--clr-accent);
            color: #fff;
        }
        .feature-card h3 { margin-bottom: 12px; font-size: 1.15rem; }
        .feature-card p { color: var(--clr-text-light); font-size: 0.92rem; margin: 0; }
        .feature-card .tag { margin-top: 16px; }

        /* ===== 服务分类 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            background: var(--clr-bg);
            border: 1px solid var(--clr-border);
        }
        .category-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .category-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
        .category-card .card-body { padding: 20px 24px; }
        .category-card h3 { font-size: 1.05rem; margin-bottom: 6px; }
        .category-card p { color: var(--clr-text-light); font-size: 0.88rem; margin: 0; }
        .category-card .tag { margin-top: 12px; }

        /* ===== 最新资讯 (CMS) ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }
        .news-card {
            background: var(--clr-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--clr-border);
            padding: 28px 24px;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--clr-accent);
        }
        .news-card .tag { align-self: flex-start; margin-bottom: 12px; }
        .news-card h3 {
            font-size: 1.05rem;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card p {
            color: var(--clr-text-light);
            font-size: 0.9rem;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--clr-text-light);
            padding-top: 12px;
            border-top: 1px solid var(--clr-border-light);
        }
        .news-card .news-meta time { display: flex; align-items: center; gap: 6px; }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            color: var(--clr-text-light);
            background: var(--clr-bg-alt);
            border-radius: var(--radius-md);
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 32px;
            text-align: center;
        }
        .stat-item h3 {
            font-size: 2.4rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 4px;
        }
        .stat-item h3 i { color: var(--clr-gold); font-size: 1.6rem; margin-right: 4px; }
        .stat-item p { color: rgba(255,255,255,0.55); font-size: 0.9rem; margin: 0; }

        /* ===== 工作流程 ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 32px;
            position: relative;
        }
        .process-step {
            text-align: center;
            position: relative;
        }
        .process-step .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--clr-accent);
            color: #fff;
            font-size: 1.3rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            position: relative;
            z-index: 2;
        }
        .process-step h4 { font-size: 1rem; margin-bottom: 8px; }
        .process-step p { color: var(--clr-text-light); font-size: 0.88rem; margin: 0; }
        .process-step::after {
            content: '';
            position: absolute;
            top: 28px;
            left: calc(50% + 36px);
            width: calc(100% - 72px);
            height: 2px;
            background: var(--clr-border);
            z-index: 1;
        }
        .process-step:last-child::after { display: none; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: grid; gap: 12px; }
        .faq-item {
            background: var(--clr-bg);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--clr-accent); }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--clr-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: none;
            transition: all var(--transition);
        }
        .faq-question i {
            color: var(--clr-accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--clr-text-light);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--clr-bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(12,18,34,0.92) 0%, rgba(12,18,34,0.70) 100%);
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-content h2 { color: #fff; margin-bottom: 16px; }
        .cta-content p { color: rgba(255,255,255,0.7); margin-bottom: 32px; font-size: 1.05rem; }
        .cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--clr-primary);
            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: 48px;
            margin-bottom: 32px;
        }
        .footer-brand .logo { margin-bottom: 16px; }
        .footer-brand p { font-size: 0.9rem; max-width: 320px; }
        .footer-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col ul { display: grid; gap: 10px; }
        .footer-col a {
            font-size: 0.88rem;
            color: rgba(255,255,255,0.5);
            transition: color var(--transition);
        }
        .footer-col a:hover { color: var(--clr-gold); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
        }
        .footer-bottom a { color: rgba(255,255,255,0.4); }
        .footer-bottom a:hover { color: var(--clr-gold); }
        .footer-social { display: flex; gap: 16px; }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.5);
            transition: all var(--transition);
        }
        .footer-social a:hover { background: var(--clr-gold); color: #0c1222; }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .intro-grid { gap: 40px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }

        @media (max-width: 768px) {
            .section { padding: 60px 0; }
            .site-header .container { padding-left: 16px; padding-right: 16px; }

            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(12,18,34,0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                gap: 0;
                padding: 16px 24px 24px;
                border-bottom: 1px solid rgba(255,255,255,0.06);
                transform: translateY(-110%);
                opacity: 0;
                transition: all 0.35s ease;
                pointer-events: none;
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                width: 100%;
                padding: 14px 0;
                border-bottom: 1px solid rgba(255,255,255,0.04);
            }
            .nav-list a::after { display: none; }
            .nav-list a.nav-cta { margin-top: 12px; text-align: center; }
            .menu-toggle { display: block; }

            .hero { min-height: 90vh; }
            .hero h1 { font-size: clamp(1.6rem, 6vw, 2.4rem); }
            .hero p { font-size: 0.95rem; }
            .hero-stats { gap: 24px; flex-wrap: wrap; }
            .hero-stat h4 { font-size: 1.4rem; }

            .intro-grid { grid-template-columns: 1fr; gap: 32px; }
            .intro-image { order: -1; }

            .features-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
            .category-grid { grid-template-columns: 1fr 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .process-grid { grid-template-columns: 1fr 1fr; }
            .process-step::after { display: none; }

            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 520px) {
            .section { padding: 48px 0; }
            .container { padding-left: 16px; padding-right: 16px; }
            .hero-actions { flex-direction: column; width: 100%; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .category-grid { grid-template-columns: 1fr; }
            .process-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
            .cta-actions { flex-direction: column; }
            .cta-actions .btn { width: 100%; justify-content: center; }
            .hero-stats { flex-direction: column; gap: 16px; }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a4a;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-section: #f1f5f9;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-light: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --shadow-xl: 0 24px 60px 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;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== 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-body);
        }
        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; transition: var(--transition); }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; letter-spacing: -0.01em; }
        .container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
        .container-narrow { max-width: 820px; margin: 0 auto; padding: 0 24px; }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--header-h);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(226,232,240,0.5);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex; align-items: center; justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex; align-items: center; gap: 8px;
            font-size: 22px; font-weight: 800; color: var(--primary);
            letter-spacing: -0.02em;
        }
        .logo i { color: var(--accent); font-size: 26px; }
        .logo span { color: var(--accent); font-weight: 700; }
        .nav-list { display: flex; align-items: center; gap: 6px; }
        .nav-list li a {
            display: block; padding: 8px 18px;
            font-size: 15px; font-weight: 500; color: var(--text-secondary);
            border-radius: var(--radius-sm);
            position: relative;
            letter-spacing: 0.01em;
        }
        .nav-list li a:hover { color: var(--primary); background: rgba(26,42,108,0.06); }
        .nav-list li a.active {
            color: var(--primary); font-weight: 600;
            background: rgba(26,42,108,0.08);
        }
        .nav-list li a.active::after {
            content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%);
            width: 20px; height: 3px; background: var(--accent); border-radius: 4px;
        }
        .nav-list li a.nav-cta {
            background: var(--primary); color: #fff;
            padding: 8px 22px; border-radius: 24px; font-weight: 600;
        }
        .nav-list li a.nav-cta:hover { background: var(--primary-light); transform: translateY(-1px); box-shadow: var(--shadow-md); }
        .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 6px; }
        .hamburger span { display: block; width: 26px; height: 2.5px; background: var(--primary); border-radius: 4px; 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); }

        /* ===== Article Hero ===== */
        .article-hero {
            margin-top: var(--header-h);
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1e2a4a 50%, var(--primary-dark) 100%);
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .article-hero .container-narrow {
            position: relative; z-index: 2;
            text-align: center;
        }
        .article-hero .article-meta {
            display: flex; align-items: center; justify-content: center; gap: 20px; flex-wrap: wrap;
            margin-bottom: 24px;
            font-size: 14px; color: rgba(255,255,255,0.7);
        }
        .article-hero .article-meta .badge {
            background: var(--accent); color: var(--primary-dark);
            padding: 4px 16px; border-radius: 20px; font-size: 13px; font-weight: 600;
        }
        .article-hero .article-meta span { display: flex; align-items: center; gap: 6px; }
        .article-hero .article-meta i { font-size: 14px; }
        .article-hero h1 {
            font-size: clamp(28px, 4.2vw, 52px);
            color: #fff;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            max-width: 800px;
            margin: 0 auto 20px;
        }
        .article-hero .article-desc {
            font-size: 18px; color: rgba(255,255,255,0.75);
            max-width: 640px; margin: 0 auto;
            line-height: 1.6;
        }

        /* ===== Article Body ===== */
        .article-body-wrap {
            padding: 60px 0 80px;
            background: var(--bg-body);
        }
        .article-body {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 48px 56px;
            font-size: 17px;
            line-height: 1.85;
            color: var(--text-primary);
        }
        .article-body p { margin-bottom: 1.6em; }
        .article-body h2 { font-size: 26px; margin-top: 2em; margin-bottom: 0.8em; color: var(--primary); }
        .article-body h3 { font-size: 21px; margin-top: 1.6em; margin-bottom: 0.6em; color: var(--primary-light); }
        .article-body ul, .article-body ol { margin-bottom: 1.6em; padding-left: 1.6em; }
        .article-body li { margin-bottom: 0.5em; list-style: disc; }
        .article-body ol li { list-style: decimal; }
        .article-body blockquote {
            border-left: 4px solid var(--accent);
            background: var(--bg-section);
            padding: 20px 28px;
            margin: 1.6em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 2em auto;
            box-shadow: var(--shadow-md);
        }
        .article-body a { color: var(--primary-light); border-bottom: 1px solid transparent; }
        .article-body a:hover { border-bottom-color: var(--primary-light); }
        .article-body code {
            background: var(--bg-section); padding: 2px 10px; border-radius: 4px;
            font-size: 0.9em; font-family: 'JetBrains Mono', monospace;
        }
        .article-body pre {
            background: var(--bg-dark); color: #e2e8f0; padding: 24px; border-radius: var(--radius-md);
            overflow-x: auto; margin: 1.6em 0; font-size: 15px; line-height: 1.6;
        }
        .article-body pre code { background: none; padding: 0; color: inherit; }

        .article-footer-bar {
            margin-top: 40px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
            display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px;
        }
        .article-footer-bar .tags {
            display: flex; gap: 8px; flex-wrap: wrap;
        }
        .article-footer-bar .tags a {
            display: inline-block; padding: 4px 16px;
            background: var(--bg-section); border-radius: 20px;
            font-size: 13px; color: var(--text-secondary);
        }
        .article-footer-bar .tags a:hover { background: var(--primary); color: #fff; }
        .article-footer-bar .share {
            display: flex; align-items: center; gap: 12px;
            font-size: 14px; color: var(--text-muted);
        }
        .article-footer-bar .share a {
            width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
            border-radius: 50%; background: var(--bg-section); color: var(--text-secondary);
            font-size: 16px;
        }
        .article-footer-bar .share a:hover { background: var(--primary); color: #fff; }

        /* ===== Article Nav (prev/next) ===== */
        .article-nav {
            margin-top: 40px;
            display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
        }
        .article-nav a {
            display: flex; flex-direction: column; gap: 6px;
            padding: 20px 24px; background: #fff; border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm); border: 1px solid var(--border);
            transition: var(--transition);
        }
        .article-nav a:hover { box-shadow: var(--shadow-md); border-color: var(--primary-light); transform: translateY(-2px); }
        .article-nav a .label { font-size: 13px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
        .article-nav a .title { font-size: 16px; font-weight: 600; color: var(--text-primary); }
        .article-nav a.next { text-align: right; }

        /* ===== Related Articles ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-section);
        }
        .related-section h2 {
            text-align: center; font-size: 28px; color: var(--primary);
            margin-bottom: 40px;
        }
        .related-grid {
            display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
        }
        .related-card {
            background: #fff; border-radius: var(--radius-md);
            overflow: hidden; box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .related-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
        .related-card .card-img {
            height: 200px; background: var(--bg-section);
            display: flex; align-items: center; justify-content: center;
            overflow: hidden;
        }
        .related-card .card-img img { width: 100%; height: 100%; object-fit: cover; }
        .related-card .card-body { padding: 20px 24px 24px; }
        .related-card .card-body .cat-tag {
            display: inline-block; padding: 2px 12px; border-radius: 12px;
            background: rgba(245,158,11,0.12); color: var(--accent-dark);
            font-size: 12px; font-weight: 600; margin-bottom: 8px;
        }
        .related-card .card-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
        .related-card .card-body h3 a { color: var(--text-primary); }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 12px; }
        .related-card .card-body .date { font-size: 13px; color: var(--text-muted); }

        /* ===== Not Found ===== */
        .not-found-wrap {
            margin-top: var(--header-h);
            padding: 120px 0;
            text-align: center;
            min-height: 60vh;
            display: flex; align-items: center; justify-content: center;
        }
        .not-found-wrap .nf-icon { font-size: 64px; color: var(--text-muted); margin-bottom: 24px; }
        .not-found-wrap h2 { font-size: 32px; color: var(--text-primary); margin-bottom: 12px; }
        .not-found-wrap p { color: var(--text-secondary); margin-bottom: 28px; font-size: 18px; }
        .not-found-wrap .btn-back {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 12px 32px; background: var(--primary); color: #fff;
            border-radius: 30px; font-weight: 600;
        }
        .not-found-wrap .btn-back:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: var(--shadow-md); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark); color: rgba(255,255,255,0.85);
            padding: 60px 0 0;
        }
        .site-footer .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);
        }
        .site-footer .logo { color: #fff; font-size: 22px; margin-bottom: 16px; }
        .site-footer .logo i { color: var(--accent); }
        .site-footer .logo span { color: var(--accent); }
        .site-footer .footer-brand p { font-size: 15px; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 360px; }
        .site-footer .footer-col h4 { font-size: 16px; color: #fff; margin-bottom: 18px; font-weight: 600; }
        .site-footer .footer-col ul li { margin-bottom: 10px; }
        .site-footer .footer-col ul li a { font-size: 15px; color: rgba(255,255,255,0.6); display: flex; align-items: center; gap: 8px; }
        .site-footer .footer-col ul li a:hover { color: var(--accent); }
        .site-footer .footer-bottom {
            display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px;
            padding: 24px 0;
            font-size: 14px; color: rgba(255,255,255,0.4);
        }
        .site-footer .footer-social { display: flex; gap: 12px; }
        .site-footer .footer-social a {
            width: 38px; height: 38px; display: flex; align-items: center; justify-content: center;
            border-radius: 50%; background: rgba(255,255,255,0.06); color: rgba(255,255,255,0.5);
            font-size: 18px;
        }
        .site-footer .footer-social a:hover { background: var(--accent); color: var(--bg-dark); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .site-footer .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .hamburger { display: flex; }
            .nav-list {
                position: fixed; top: var(--header-h); left: 0; right: 0;
                background: rgba(255,255,255,0.98); backdrop-filter: blur(18px);
                flex-direction: column; padding: 20px 24px;
                gap: 4px;
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%); opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                border-bottom: 1px solid var(--border);
            }
            .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-list li a { padding: 12px 16px; font-size: 16px; border-radius: var(--radius-sm); }
            .nav-list li a.nav-cta { text-align: center; }

            .article-hero { padding: 60px 0 40px; }
            .article-hero h1 { font-size: 26px; }
            .article-hero .article-desc { font-size: 16px; }

            .article-body { padding: 28px 24px; font-size: 16px; }
            .article-body h2 { font-size: 22px; }
            .article-body h3 { font-size: 18px; }

            .article-nav { grid-template-columns: 1fr; gap: 12px; }
            .related-grid { grid-template-columns: 1fr; }

            .site-footer .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .site-footer .footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-body { padding: 20px 16px; border-radius: var(--radius-md); }
            .article-hero { padding: 48px 0 32px; }
            .article-hero h1 { font-size: 22px; }
            .article-footer-bar { flex-direction: column; align-items: flex-start; }
            .related-card .card-img { height: 160px; }
        }

        /* ===== Print ===== */
        @media print {
            .site-header, .site-footer, .article-nav, .related-section, .hamburger { display: none !important; }
            .article-hero { margin-top: 0; padding: 40px 0; background: #fff !important; }
            .article-hero h1 { color: #000; }
            .article-hero .article-meta { color: #666; }
            .article-body-wrap { padding: 20px 0; }
            .article-body { box-shadow: none; padding: 0; }
        }

/* roulang page: category1 */
:root {
    --primary: #1a2a6c;
    --primary-light: #2d4a8e;
    --primary-dark: #0f1a4a;
    --accent: #e8a838;
    --accent-light: #f0c060;
    --accent-dark: #c88a20;
    --bg-body: #f8f9fc;
    --bg-white: #ffffff;
    --bg-light: #eef0f6;
    --bg-dark: #0d1117;
    --text-dark: #1a1a2e;
    --text-body: #3a3a4a;
    --text-light: #6b6b7b;
    --text-white: #f0f0f5;
    --border: #e2e4ec;
    --border-light: #f0f1f5;
    --shadow-sm: 0 2px 8px rgba(26, 42, 108, 0.06);
    --shadow-md: 0 6px 24px rgba(26, 42, 108, 0.08);
    --shadow-lg: 0 16px 48px rgba(26, 42, 108, 0.12);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --container: 1200px;
    --header-h: 72px;
}
*, *::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-body); background: var(--bg-body); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
ul, ol { list-style: none; }
input, button, textarea { font-family: inherit; font-size: 1rem; border: none; outline: none; }
button { cursor: pointer; background: none; }
h1, h2, h3, h4, h5, h6 { color: var(--text-dark); font-weight: 700; line-height: 1.25; }
h1 { font-size: 2.75rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 860px; }

/* header / nav */
.site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; height: var(--header-h); background: rgba(255,255,255,0.92); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-bottom: 1px solid var(--border-light); transition: var(--transition); }
.site-header.scrolled { box-shadow: var(--shadow-sm); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.logo { display: flex; align-items: center; gap: 8px; font-size: 1.25rem; font-weight: 800; color: var(--primary); letter-spacing: -0.3px; }
.logo i { color: var(--accent); font-size: 1.3rem; }
.logo span { color: var(--accent); font-weight: 400; }
.logo:hover { color: var(--primary); opacity: 0.9; }
.nav-list { display: flex; align-items: center; gap: 28px; }
.nav-list a { font-size: 0.92rem; font-weight: 500; color: var(--text-body); padding: 6px 0; position: relative; letter-spacing: 0.2px; }
.nav-list a::after { content: ''; position: absolute; bottom: -2px; left: 0; right: 0; height: 2px; background: var(--accent); border-radius: 2px; transform: scaleX(0); transition: var(--transition); }
.nav-list a:hover { color: var(--primary); }
.nav-list a:hover::after { transform: scaleX(1); }
.nav-list a.active { color: var(--primary); font-weight: 600; }
.nav-list a.active::after { transform: scaleX(1); background: var(--primary); }
.nav-list a.nav-cta { background: var(--primary); color: #fff; padding: 8px 22px; border-radius: 50px; font-weight: 600; letter-spacing: 0.3px; box-shadow: 0 4px 14px rgba(26,42,108,0.2); }
.nav-list a.nav-cta::after { display: none; }
.nav-list a.nav-cta:hover { background: var(--primary-light); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(26,42,108,0.25); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 6px; cursor: pointer; background: none; border: none; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text-dark); border-radius: 2px; transition: var(--transition); }

/* hero banner */
.page-banner { margin-top: var(--header-h); padding: 100px 0 80px; background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%); position: relative; overflow: hidden; }
.page-banner::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center/cover no-repeat; opacity: 0.12; mix-blend-mode: overlay; }
.page-banner .container { position: relative; z-index: 2; }
.page-banner h1 { color: #fff; font-size: 2.8rem; margin-bottom: 16px; letter-spacing: -0.5px; }
.page-banner p { color: rgba(255,255,255,0.8); font-size: 1.15rem; max-width: 640px; line-height: 1.7; }
.breadcrumb { display: flex; align-items: center; gap: 10px; margin-bottom: 24px; font-size: 0.9rem; color: rgba(255,255,255,0.6); }
.breadcrumb a { color: rgba(255,255,255,0.7); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { color: var(--accent); }

/* section */
.section { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 52px; }
.section-header h2 { font-size: 2.2rem; margin-bottom: 12px; }
.section-header p { color: var(--text-light); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }
.section-divider { width: 60px; height: 3px; background: var(--accent); border-radius: 3px; margin: 16px auto 20px; }

/* guide cards */
.guide-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 28px; }
.guide-card { background: var(--bg-white); border-radius: var(--radius-md); padding: 32px 28px; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); transition: var(--transition); }
.guide-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); border-color: var(--accent); }
.guide-card .icon { width: 56px; height: 56px; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 1.6rem; color: #fff; margin-bottom: 20px; }
.guide-card:nth-child(1) .icon { background: linear-gradient(135deg, #1a2a6c, #3a5a9e); }
.guide-card:nth-child(2) .icon { background: linear-gradient(135deg, #e8a838, #f0c060); }
.guide-card:nth-child(3) .icon { background: linear-gradient(135deg, #0d7377, #15aab5); }
.guide-card:nth-child(4) .icon { background: linear-gradient(135deg, #8e44ad, #be6ed7); }
.guide-card:nth-child(5) .icon { background: linear-gradient(135deg, #c0392b, #e74c3c); }
.guide-card:nth-child(6) .icon { background: linear-gradient(135deg, #2c3e50, #5a7a9a); }
.guide-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.guide-card p { font-size: 0.95rem; color: var(--text-light); line-height: 1.7; }
.guide-card .tag { display: inline-block; margin-top: 16px; font-size: 0.8rem; font-weight: 500; color: var(--accent-dark); background: rgba(232,168,56,0.1); padding: 4px 14px; border-radius: 50px; }

/* process */
.process-section { background: var(--bg-white); }
.process-steps { display: flex; flex-wrap: wrap; gap: 0; justify-content: center; counter-reset: step; }
.process-step { flex: 1 1 200px; max-width: 220px; text-align: center; padding: 32px 20px; position: relative; }
.process-step::before { counter-increment: step; content: "0" counter(step); position: absolute; top: 8px; left: 50%; transform: translateX(-50%); font-size: 3rem; font-weight: 800; color: rgba(26,42,108,0.06); line-height: 1; }
.process-step .step-icon { width: 60px; height: 60px; border-radius: 50%; background: var(--bg-light); display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; font-size: 1.4rem; color: var(--primary); transition: var(--transition); }
.process-step:hover .step-icon { background: var(--primary); color: #fff; }
.process-step h4 { font-size: 1rem; margin-bottom: 8px; }
.process-step p { font-size: 0.88rem; color: var(--text-light); line-height: 1.6; }
.process-arrow { display: flex; align-items: center; font-size: 1.4rem; color: var(--border); flex: 0 0 30px; justify-content: center; }

/* article list */
.article-list { display: flex; flex-direction: column; gap: 20px; }
.article-row { display: flex; align-items: flex-start; gap: 24px; background: var(--bg-white); border-radius: var(--radius-md); padding: 24px 28px; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); transition: var(--transition); }
.article-row:hover { box-shadow: var(--shadow-md); transform: translateX(4px); border-color: var(--accent); }
.article-row .num { font-size: 2rem; font-weight: 800; color: rgba(26,42,108,0.08); min-width: 44px; line-height: 1; }
.article-row .content { flex: 1; }
.article-row .content h3 { font-size: 1.1rem; margin-bottom: 6px; }
.article-row .content h3 a { color: var(--text-dark); }
.article-row .content h3 a:hover { color: var(--primary); }
.article-row .content p { font-size: 0.92rem; color: var(--text-light); line-height: 1.6; }
.article-row .meta { display: flex; align-items: center; gap: 16px; margin-top: 10px; font-size: 0.82rem; color: var(--text-light); }
.article-row .meta i { margin-right: 4px; }
.article-row .badge { font-size: 0.75rem; font-weight: 600; padding: 2px 12px; border-radius: 50px; background: rgba(232,168,56,0.12); color: var(--accent-dark); }

/* faq */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--bg-white); border-radius: var(--radius-md); border: 1px solid var(--border-light); overflow: hidden; transition: var(--transition); }
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-question { display: flex; align-items: center; justify-content: space-between; padding: 18px 24px; font-weight: 600; color: var(--text-dark); cursor: pointer; font-size: 1rem; transition: var(--transition); }
.faq-question:hover { color: var(--primary); }
.faq-question i { transition: var(--transition); color: var(--text-light); font-size: 0.9rem; }
.faq-item.active .faq-question i { transform: rotate(180deg); color: var(--accent); }
.faq-answer { padding: 0 24px 20px; font-size: 0.95rem; color: var(--text-light); line-height: 1.8; display: none; }
.faq-item.active .faq-answer { display: block; }

/* cta */
.cta-section { background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 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-3.png') center/cover no-repeat; opacity: 0.08; mix-blend-mode: overlay; }
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { color: #fff; font-size: 2rem; margin-bottom: 12px; }
.cta-section p { color: rgba(255,255,255,0.8); max-width: 520px; margin: 0 auto 28px; font-size: 1.05rem; }
.cta-btn { display: inline-block; background: var(--accent); color: var(--primary-dark); padding: 14px 40px; border-radius: 50px; font-weight: 700; font-size: 1.05rem; letter-spacing: 0.3px; box-shadow: 0 8px 30px rgba(232,168,56,0.35); transition: var(--transition); }
.cta-btn:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 12px 40px rgba(232,168,56,0.45); color: var(--primary-dark); }

/* footer */
.site-footer { background: var(--bg-dark); color: rgba(255,255,255,0.7); padding: 60px 0 30px; }
.site-footer .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.site-footer .footer-brand .logo { color: #fff; font-size: 1.2rem; margin-bottom: 14px; display: inline-flex; }
.site-footer .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 360px; }
.site-footer h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; font-weight: 600; }
.site-footer ul li { margin-bottom: 10px; }
.site-footer ul li a { color: rgba(255,255,255,0.6); font-size: 0.9rem; }
.site-footer ul li a:hover { color: var(--accent); }
.site-footer ul li a i { width: 20px; margin-right: 4px; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.08); font-size: 0.85rem; flex-wrap: wrap; gap: 12px; }
.footer-social { display: flex; gap: 16px; }
.footer-social a { color: rgba(255,255,255,0.5); font-size: 1.1rem; }
.footer-social a:hover { color: var(--accent); }

/* mobile nav */
@media (max-width: 1024px) {
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.7rem; }
    .page-banner h1 { font-size: 2.2rem; }
    .process-arrow { display: none; }
    .process-step { flex: 1 1 160px; }
}
@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .nav-list { position: fixed; top: var(--header-h); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); flex-direction: column; padding: 24px 28px; gap: 18px; border-bottom: 1px solid var(--border); transform: translateY(-120%); opacity: 0; transition: var(--transition); pointer-events: none; box-shadow: var(--shadow-md); }
    .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: all; }
    .nav-list a { font-size: 1rem; }
    .nav-list a.nav-cta { text-align: center; width: 100%; }
    .page-banner { padding: 70px 0 50px; }
    .page-banner h1 { font-size: 1.8rem; }
    .section { padding: 50px 0; }
    .guide-grid { grid-template-columns: 1fr; }
    .article-row { flex-direction: column; padding: 20px; }
    .article-row .num { display: none; }
    .site-footer .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .process-step { flex: 1 1 100%; max-width: 100%; padding: 20px; }
    .cta-section h2 { font-size: 1.5rem; }
}
@media (max-width: 520px) {
    .container { padding: 0 16px; }
    .page-banner h1 { font-size: 1.5rem; }
    h2 { font-size: 1.4rem; }
    .guide-card { padding: 24px 20px; }
    .faq-question { padding: 14px 18px; font-size: 0.92rem; }
    .cta-btn { padding: 12px 28px; font-size: 0.95rem; }
}

/* skeleton */
.skeleton { background: linear-gradient(90deg, #f0f1f5 25%, #e2e4ec 50%, #f0f1f5 75%); background-size: 200% 100%; animation: shimmer 1.4s infinite; border-radius: var(--radius-sm); }
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }