/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1e3a6f;
            --primary-light: #2d5fa0;
            --primary-dark: #0f2447;
            --accent: #06b6d4;
            --accent-light: #22d3ee;
            --accent-dark: #0891b2;
            --bg-white: #ffffff;
            --bg-light: #f8fafc;
            --bg-dark: #0f172a;
            --text-dark: #0f172a;
            --text-body: #334155;
            --text-muted: #94a3b8;
            --text-white: #f1f5f9;
            --border-light: #e2e8f0;
            --border-mid: #cbd5e1;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 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(0,0,0,0.18);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

        /* ===== 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-body);
            background-color: var(--bg-white);
        }
        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; outline: none; border: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; color: var(--text-dark); font-weight: 700; }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2.2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }
        p { margin-bottom: 0.75rem; }
        .container-custom {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        .section-padding { padding-top: 5rem; padding-bottom: 5rem; }
        .section-title { text-align: center; margin-bottom: 3rem; }
        .section-title h2 { position: relative; display: inline-block; }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 4px;
            margin: 0.75rem auto 0;
        }
        .section-title p { color: var(--text-muted); max-width: 600px; margin: 0.75rem auto 0; font-size: 1.05rem; }

        /* ===== 导航 (浮动Dock) ===== */
        .site-header {
            position: fixed;
            top: 1rem;
            left: 0;
            right: 0;
            z-index: 9999;
            pointer-events: none;
        }
        .nav-dock {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 1rem;
            pointer-events: auto;
        }
        .nav-dock-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(255,255,255,0.88);
            backdrop-filter: blur(18px) saturate(180%);
            -webkit-backdrop-filter: blur(18px) saturate(180%);
            border-radius: 60px;
            padding: 0.6rem 1.8rem 0.6rem 2rem;
            box-shadow: 0 8px 32px rgba(0,0,0,0.10);
            border: 1px solid rgba(255,255,255,0.40);
            transition: var(--transition);
        }
        .nav-dock-inner:hover { box-shadow: 0 12px 40px rgba(0,0,0,0.14); }
        .nav-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .nav-logo i { color: var(--accent); font-size: 1.5rem; }
        .nav-links { display: flex; align-items: center; gap: 0.25rem; }
        .nav-links a {
            padding: 0.45rem 1rem;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-links a:hover { color: var(--primary); background: rgba(30,58,111,0.06); }
        .nav-links a.active {
            color: var(--primary-dark);
            background: rgba(30,58,111,0.10);
            font-weight: 600;
        }
        .nav-cta a {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.5rem 1.4rem;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(30,58,111,0.25);
        }
        .nav-cta a:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(30,58,111,0.35);
        }
        .nav-toggle { display: none; background: none; font-size: 1.6rem; color: var(--text-dark); cursor: pointer; padding: 0.2rem; }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 5.5rem;
            left: 1rem;
            right: 1rem;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(18px);
            border-radius: var(--radius-lg);
            padding: 1.5rem 1.8rem;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-light);
            z-index: 9998;
            flex-direction: column;
            gap: 0.6rem;
        }
        .mobile-menu.open { display: flex; }
        .mobile-menu a {
            padding: 0.7rem 1rem;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
        }
        .mobile-menu a:hover { background: var(--bg-light); color: var(--primary); }
        .mobile-menu a.active { color: var(--primary); background: rgba(30,58,111,0.06); font-weight: 600; }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a6f 50%, #0f2447 100%);
            overflow: hidden;
            padding-top: 6rem;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.28;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(6,182,212,0.15) 0%, transparent 60%);
        }
        .hero-content { position: relative; z-index: 2; width: 100%; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(255,255,255,0.08);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255,255,255,0.12);
            padding: 0.4rem 1.2rem;
            border-radius: 40px;
            font-size: 0.85rem;
            color: var(--text-white);
            margin-bottom: 1.8rem;
        }
        .hero-badge i { color: var(--accent-light); }
        .hero-title {
            font-size: 3.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.15;
            letter-spacing: -0.5px;
            max-width: 740px;
        }
        .hero-title span { 
            background: linear-gradient(90deg, #22d3ee, #67e8f9);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.70);
            max-width: 580px;
            margin: 1.5rem 0 2.2rem;
            line-height: 1.8;
        }
        .hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 2.2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            color: #fff;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            transition: var(--transition);
            box-shadow: 0 6px 24px rgba(6,182,212,0.35);
        }
        .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(6,182,212,0.45); }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 2.2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            color: #fff;
            border: 1.5px solid rgba(255,255,255,0.35);
            background: transparent;
            transition: var(--transition);
        }
        .btn-outline-light:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.60); transform: translateY(-3px); }
        .hero-stats { display: flex; gap: 2.5rem; margin-top: 3rem; flex-wrap: wrap; }
        .hero-stat-item { text-align: center; }
        .hero-stat-item .num { font-size: 2rem; font-weight: 800; color: #fff; }
        .hero-stat-item .label { font-size: 0.85rem; color: rgba(255,255,255,0.55); margin-top: 0.2rem; }

        /* ===== 卡片通用 ===== */
        .card-base {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            overflow: hidden;
        }
        .card-base:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .card-img { width: 100%; height: 200px; object-fit: cover; }
        .card-body { padding: 1.5rem; }
        .card-body h3 { font-size: 1.2rem; margin-bottom: 0.5rem; }
        .card-body p { color: var(--text-muted); font-size: 0.95rem; }
        .badge {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(6,182,212,0.10);
            color: var(--accent-dark);
        }
        .badge-primary { background: rgba(30,58,111,0.08); color: var(--primary); }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }
        .category-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 2rem 1.8rem;
            text-align: center;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .category-card:hover::before { opacity: 1; }
        .category-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); }
        .category-card .icon-wrap {
            width: 64px;
            height: 64px;
            margin: 0 auto 1.2rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
        }
        .category-card h3 { font-size: 1.2rem; margin-bottom: 0.5rem; }
        .category-card p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 1.2rem; }
        .category-card .tag-group { display: flex; justify-content: center; gap: 0.4rem; flex-wrap: wrap; }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .stat-card {
            text-align: center;
            padding: 2rem 1.2rem;
            background: rgba(255,255,255,0.05);
            backdrop-filter: blur(6px);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255,255,255,0.08);
            transition: var(--transition);
        }
        .stat-card:hover { background: rgba(255,255,255,0.08); transform: translateY(-3px); }
        .stat-card .num { font-size: 2.6rem; font-weight: 800; color: #fff; }
        .stat-card .label { font-size: 0.9rem; color: rgba(255,255,255,0.6); margin-top: 0.3rem; }

        /* ===== 资讯列表 ===== */
        .news-list { display: flex; flex-direction: column; gap: 1.2rem; }
        .news-item {
            display: flex;
            align-items: center;
            gap: 1.2rem;
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            padding: 1.2rem 1.5rem;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .news-item:hover { box-shadow: var(--shadow-md); transform: translateX(4px); border-color: var(--border-mid); }
        .news-item .num { font-size: 1.4rem; font-weight: 800; color: var(--border-mid); min-width: 2.2rem; }
        .news-item .info { flex: 1; }
        .news-item .info h4 { font-size: 1rem; font-weight: 600; margin-bottom: 0.2rem; transition: var(--transition); }
        .news-item:hover .info h4 { color: var(--primary); }
        .news-item .info .meta { font-size: 0.82rem; color: var(--text-muted); display: flex; gap: 1rem; }
        .news-item .badge { flex-shrink: 0; }

        /* ===== 流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.8rem;
        }
        .step-card {
            text-align: center;
            padding: 2rem 1.2rem;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .step-num {
            width: 48px;
            height: 48px;
            margin: 0 auto 1rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--accent));
        }
        .step-card h4 { font-size: 1.05rem; margin-bottom: 0.4rem; }
        .step-card p { font-size: 0.9rem; color: var(--text-muted); }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 0.8rem; }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border-mid); }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.2rem 1.5rem;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-dark);
            background: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover { background: var(--bg-light); }
        .faq-question i { transition: transform 0.3s; color: var(--text-muted); font-size: 0.9rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 1.5rem;
            color: var(--text-body);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.2rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.10;
            mix-blend-mode: overlay;
        }
        .cta-content { position: relative; z-index: 1; text-align: center; }
        .cta-content h2 { color: #fff; font-size: 2.2rem; }
        .cta-content p { color: rgba(255,255,255,0.7); max-width: 540px; margin: 0.8rem auto 2rem; font-size: 1.05rem; }
        .cta-actions { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 3.5rem 0 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .nav-logo { color: #fff; margin-bottom: 0.8rem; }
        .footer-brand p { font-size: 0.9rem; max-width: 300px; }
        .footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 1rem; font-weight: 600; }
        .footer-col a {
            display: block;
            padding: 0.3rem 0;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.55);
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--accent-light); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 1.5rem;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
            flex-wrap: wrap;
            gap: 0.8rem;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero-title { font-size: 2.8rem; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .nav-links, .nav-cta { display: none; }
            .nav-toggle { display: block; }
            .nav-dock-inner { padding: 0.6rem 1.2rem 0.6rem 1.5rem; }
            .hero-title { font-size: 2.2rem; }
            .hero-desc { font-size: 1rem; }
            .hero-stats { gap: 1.5rem; }
            .hero-stat-item .num { font-size: 1.6rem; }
            .category-grid { grid-template-columns: 1fr; }
            .section-padding { padding-top: 3.5rem; padding-bottom: 3.5rem; }
            .section-title h2 { font-size: 1.8rem; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
            .stat-card .num { font-size: 2rem; }
            .steps-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; text-align: center; }
            .footer-brand p { max-width: 100%; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-content h2 { font-size: 1.8rem; }
            .news-item { flex-direction: column; align-items: flex-start; gap: 0.6rem; }
            .news-item .num { display: none; }
        }
        @media (max-width: 520px) {
            .hero-title { font-size: 1.8rem; }
            .hero-actions { flex-direction: column; }
            .btn-primary, .btn-outline-light { width: 100%; justify-content: center; }
            .hero-stats { flex-direction: column; gap: 1rem; align-items: center; }
            .stats-grid { grid-template-columns: 1fr; }
            .container-custom { padding-left: 1rem; padding-right: 1rem; }
            .section-title h2 { font-size: 1.5rem; }
            .nav-logo { font-size: 1.1rem; }
            .nav-logo i { font-size: 1.2rem; }
        }

        /* ===== 工具类补充 ===== */
        .text-gradient { background: linear-gradient(90deg, var(--accent), var(--accent-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .bg-section-alt { background-color: var(--bg-light); }
        .gap-section { height: 1px; background: var(--border-light); margin: 0; }
        .rounded-full { border-radius: 9999px; }
        .truncate-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* roulang page: article */
:root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --primary-light: #dbeafe;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border-color: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* 浮动 Dock 导航 */
        .nav-dock {
            position: sticky;
            top: 16px;
            z-index: 100;
            display: flex;
            justify-content: center;
            padding: 0 16px;
            margin-bottom: 16px;
        }
        .nav-dock-inner {
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(18px) saturate(1.4);
            -webkit-backdrop-filter: blur(18px) saturate(1.4);
            border: 1px solid rgba(255,255,255,0.5);
            box-shadow: 0 8px 32px rgba(0,0,0,0.08);
            border-radius: 60px;
            padding: 10px 28px;
            display: flex;
            align-items: center;
            gap: 32px;
            width: 100%;
            max-width: 1100px;
            transition: var(--transition);
        }
        .nav-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            text-decoration: none;
        }
        .nav-logo i { font-size: 1.2rem; color: var(--accent); }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            flex: 1;
            justify-content: center;
        }
        .nav-links a {
            text-decoration: none;
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            padding: 6px 16px;
            border-radius: 30px;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links a:hover { color: var(--primary); background: var(--primary-light); }
        .nav-links a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 12px rgba(37,99,235,0.3);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-search {
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            border-radius: 30px;
            padding: 6px 16px;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .nav-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.15); }
        .nav-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.85rem;
            color: var(--text-primary);
            width: 120px;
        }
        .nav-search input::placeholder { color: var(--text-muted); }
        .nav-search i { color: var(--text-muted); font-size: 0.85rem; }
        .nav-cta {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 30px;
            padding: 8px 22px;
            font-size: 0.85rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(37,99,235,0.35); }
        .mobile-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--text-primary); cursor: pointer; padding: 4px; }
        /* 文章页面 */
        .page-banner {
            background: linear-gradient(135deg, #1e3a5f 0%, #1e40af 50%, #2563eb 100%);
            padding: 60px 0 50px;
            margin-top: -16px;
            position: relative;
            overflow: hidden;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .page-banner .container-custom { position: relative; z-index: 1; }
        .page-banner h1 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            max-width: 800px;
            margin-bottom: 12px;
        }
        .page-banner .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            color: rgba(255,255,255,0.75);
            font-size: 0.9rem;
            align-items: center;
        }
        .page-banner .meta i { margin-right: 4px; }
        .page-banner .meta .badge {
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(4px);
            padding: 4px 14px;
            border-radius: 30px;
            font-size: 0.8rem;
            color: #fff;
            border: 1px solid rgba(255,255,255,0.2);
        }
        .article-body {
            padding: 48px 0 60px;
        }
        .article-main {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
            padding: 48px 56px;
            max-width: 860px;
            margin: 0 auto;
        }
        .article-main .content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-main .content p { margin-bottom: 1.4em; }
        .article-main .content h2, .article-main .content h3 { margin-top: 1.8em; margin-bottom: 0.8em; font-weight: 700; color: var(--text-primary); }
        .article-main .content h2 { font-size: 1.5rem; }
        .article-main .content h3 { font-size: 1.25rem; }
        .article-main .content ul, .article-main .content ol { margin-bottom: 1.4em; padding-left: 1.6em; }
        .article-main .content li { margin-bottom: 0.4em; }
        .article-main .content img { max-width: 100%; height: auto; border-radius: var(--radius-sm); margin: 1.6em 0; box-shadow: var(--shadow-sm); }
        .article-main .content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 24px;
            margin: 1.6em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
        }
        .article-main .content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
        .article-main .content a:hover { color: var(--primary-dark); }
        .article-footer-bar {
            margin-top: 36px;
            padding-top: 28px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .article-footer-bar .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-footer-bar .tags span {
            background: var(--bg-body);
            padding: 4px 14px;
            border-radius: 30px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
        }
        .article-footer-bar .share {
            display: flex;
            gap: 10px;
            align-items: center;
        }
        .article-footer-bar .share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-body);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            text-decoration: none;
            font-size: 1rem;
        }
        .article-footer-bar .share a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
        .article-not-found {
            text-align: center;
            padding: 80px 24px;
        }
        .article-not-found i { font-size: 4rem; color: var(--text-muted); margin-bottom: 20px; }
        .article-not-found h2 { font-size: 1.8rem; color: var(--text-primary); margin-bottom: 12px; }
        .article-not-found p { color: var(--text-secondary); margin-bottom: 24px; }
        .article-not-found a { color: var(--primary); font-weight: 600; text-decoration: none; }
        .article-not-found a:hover { text-decoration: underline; }
        /* 相关内容推荐 */
        .related-section {
            padding: 0 0 60px;
        }
        .related-section h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 28px;
            text-align: center;
            color: var(--text-primary);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            transition: var(--transition);
            border: 1px solid var(--border-color);
            text-decoration: none;
            display: block;
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--primary-light); }
        .related-card .cat-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 30px;
            margin-bottom: 10px;
        }
        .related-card h3 { font-size: 1.05rem; font-weight: 600; color: var(--text-primary); margin-bottom: 8px; line-height: 1.4; }
        .related-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; }
        .related-card .date { font-size: 0.8rem; color: var(--text-muted); margin-top: 12px; display: block; }
        /* 页脚 */
        .site-footer {
            background: #0f172a;
            color: rgba(255,255,255,0.7);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .nav-logo { color: #fff; font-size: 1.4rem; margin-bottom: 12px; }
        .footer-brand .nav-logo i { color: var(--accent); }
        .footer-brand p { font-size: 0.9rem; line-height: 1.8; color: rgba(255,255,255,0.5); max-width: 360px; }
        .footer-col h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
        .footer-col a { display: block; color: rgba(255,255,255,0.5); text-decoration: none; font-size: 0.88rem; padding: 4px 0; transition: var(--transition); }
        .footer-col a:hover { color: #fff; padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 20px 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.35); text-decoration: none; }
        .footer-bottom a:hover { color: #fff; }
        /* 响应式 */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .article-main { padding: 36px 32px; }
        }
        @media (max-width: 768px) {
            .nav-dock-inner { padding: 8px 16px; gap: 12px; border-radius: 40px; flex-wrap: wrap; }
            .nav-links { order: 3; width: 100%; justify-content: center; gap: 4px; padding-top: 6px; border-top: 1px solid var(--border-color); }
            .nav-links a { font-size: 0.8rem; padding: 4px 12px; }
            .nav-search { display: none; }
            .nav-cta { padding: 6px 16px; font-size: 0.8rem; }
            .page-banner h1 { font-size: 1.6rem; }
            .page-banner { padding: 40px 0 36px; }
            .article-main { padding: 28px 20px; border-radius: var(--radius-sm); }
            .article-main .content { font-size: 0.98rem; }
            .article-footer-bar { flex-direction: column; align-items: flex-start; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
        }
        @media (max-width: 520px) {
            .container-custom { padding: 0 16px; }
            .nav-dock { top: 8px; padding: 0 8px; }
            .nav-dock-inner { padding: 6px 12px; gap: 8px; }
            .nav-logo { font-size: 1.1rem; }
            .nav-links a { font-size: 0.75rem; padding: 3px 10px; }
            .nav-cta { font-size: 0.75rem; padding: 4px 12px; }
            .page-banner h1 { font-size: 1.3rem; }
            .article-main { padding: 20px 16px; }
        }

/* roulang page: category1 */
/* ===== 设计变量 & 基础重置 ===== */
        :root {
            --primary: #2a6df4;
            --primary-dark: #1a4fc3;
            --primary-light: #e8f0fe;
            --secondary: #f97316;
            --secondary-dark: #ea580c;
            --accent: #06b6d4;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-darker: #0b1120;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-inverse: #f1f5f9;
            --border-light: #e2e8f0;
            --border-medium: #cbd5e1;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.18);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        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);
            outline-offset: 2px;
        }

        /* ===== 容器 ===== */
        .container-custom {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        @media (min-width: 768px) {
            .container-custom {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* ===== 浮动 Dock 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0.75rem 1rem;
            pointer-events: none;
            display: flex;
            justify-content: center;
        }

        .nav-dock {
            pointer-events: auto;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(16px) saturate(1.4);
            -webkit-backdrop-filter: blur(16px) saturate(1.4);
            border: 1px solid rgba(255, 255, 255, 0.5);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
            border-radius: 60px;
            padding: 0.5rem 1.8rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1000px;
            transition: box-shadow var(--transition), background var(--transition);
        }

        .nav-dock:hover {
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
            background: rgba(255, 255, 255, 0.95);
        }

        .nav-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            white-space: nowrap;
        }
        .nav-logo i {
            color: var(--primary);
            font-size: 1.2rem;
        }
        .nav-logo span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.2rem;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-links a {
            padding: 0.4rem 1rem;
            border-radius: 40px;
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .nav-links a:hover {
            background: var(--primary-light);
            color: var(--primary);
            transform: translateY(-1px);
        }
        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(42, 109, 244, 0.3);
        }
        .nav-links a.active:hover {
            background: var(--primary-dark);
            color: #fff;
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--secondary), #ef4444);
            color: #fff !important;
            padding: 0.5rem 1.2rem !important;
            border-radius: 40px !important;
            font-weight: 600;
            font-size: 0.85rem;
            box-shadow: 0 4px 14px rgba(249, 115, 22, 0.3);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .nav-cta:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 24px rgba(249, 115, 22, 0.4);
            background: linear-gradient(135deg, #f97316, #dc2626) !important;
        }

        .mobile-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--text-primary);
            padding: 0.3rem 0.5rem;
            border-radius: 8px;
            background: transparent;
            transition: background var(--transition);
        }
        .mobile-toggle:hover {
            background: var(--primary-light);
        }

        /* ===== 移动端导航抽屉 ===== */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.4);
            backdrop-filter: blur(4px);
            z-index: 2000;
            justify-content: flex-end;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s, visibility 0.3s;
        }
        .mobile-drawer.open {
            opacity: 1;
            visibility: visible;
        }
        .mobile-drawer-panel {
            width: 280px;
            max-width: 80vw;
            background: #fff;
            padding: 2rem 1.5rem;
            height: 100%;
            overflow-y: auto;
            transform: translateX(100%);
            transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: -8px 0 40px rgba(0, 0, 0, 0.15);
        }
        .mobile-drawer.open .mobile-drawer-panel {
            transform: translateX(0);
        }
        .mobile-drawer-close {
            font-size: 1.5rem;
            color: var(--text-secondary);
            margin-bottom: 2rem;
            display: block;
            text-align: right;
            padding: 0.3rem;
        }
        .mobile-drawer-links a {
            display: block;
            padding: 0.8rem 0.6rem;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-primary);
            border-bottom: 1px solid var(--border-light);
            transition: color var(--transition), background var(--transition);
            border-radius: 8px;
        }
        .mobile-drawer-links a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .mobile-drawer-links a.active {
            color: var(--primary);
            font-weight: 700;
            background: var(--primary-light);
        }
        .mobile-drawer-cta {
            margin-top: 2rem;
            display: block;
            text-align: center;
            padding: 0.9rem;
            background: linear-gradient(135deg, var(--secondary), #ef4444);
            color: #fff !important;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            box-shadow: 0 4px 14px rgba(249, 115, 22, 0.3);
        }

        /* ===== Hero / Banner ===== */
        .hero-banner {
            position: relative;
            min-height: 60vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 8rem 1.5rem 4rem;
            background: var(--bg-dark);
            overflow: hidden;
        }
        .hero-banner-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.35;
            z-index: 0;
            transform: scale(1.05);
            transition: transform 8s ease;
        }
        .hero-banner:hover .hero-banner-bg {
            transform: scale(1);
        }
        .hero-banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(15, 23, 42, 0.6) 50%, rgba(6, 182, 212, 0.15) 100%);
            z-index: 1;
        }
        .hero-banner-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            color: var(--text-inverse);
        }
        .hero-banner-content h1 {
            font-size: clamp(2.2rem, 6vw, 4rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 1.2rem;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .hero-banner-content h1 .highlight {
            background: linear-gradient(135deg, #60a5fa, #06b6d4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-banner-content p {
            font-size: clamp(1rem, 2vw, 1.2rem);
            color: rgba(255, 255, 255, 0.75);
            max-width: 640px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }
        .hero-banner-content .hero-badges {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.8rem;
            margin-bottom: 2rem;
        }
        .hero-banner-content .hero-badges span {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 0.4rem 1.2rem;
            border-radius: 40px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
        }
        .hero-banner-content .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 2px solid transparent;
            cursor: pointer;
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 14px rgba(42, 109, 244, 0.3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(42, 109, 244, 0.4);
        }
        .btn-secondary {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.4);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-orange {
            background: linear-gradient(135deg, var(--secondary), #ef4444);
            color: #fff;
            border-color: transparent;
            box-shadow: 0 4px 14px rgba(249, 115, 22, 0.3);
        }
        .btn-orange:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 28px rgba(249, 115, 22, 0.45);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(42, 109, 244, 0.25);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 4.5rem 0;
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-inverse);
        }
        .section-light {
            background: var(--bg-body);
        }
        .section-white {
            background: #fff;
        }

        .section-title {
            font-size: clamp(1.6rem, 3.5vw, 2.5rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.01em;
            margin-bottom: 0.75rem;
        }
        .section-subtitle {
            font-size: clamp(0.95rem, 1.4vw, 1.1rem);
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 2.5rem;
            line-height: 1.6;
        }
        .section-dark .section-subtitle {
            color: rgba(255, 255, 255, 0.6);
        }

        .text-center {
            text-align: center;
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 1.8rem;
            transition: all var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--border-medium);
        }
        .card-dark {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(8px);
        }
        .card-dark:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.2);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
        }

        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 1rem;
            background: var(--primary-light);
            color: var(--primary);
        }
        .card-dark .card-icon {
            background: rgba(42, 109, 244, 0.2);
            color: #60a5fa;
        }

        .card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }
        .card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .card-dark p {
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== 价格卡片 ===== */
        .pricing-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 2rem 1.8rem;
            text-align: center;
            transition: all var(--transition);
            position: relative;
        }
        .pricing-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
            border-color: var(--primary);
        }
        .pricing-card .domain-ext {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 0.3rem;
        }
        .pricing-card .price {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1;
        }
        .pricing-card .price small {
            font-size: 1rem;
            font-weight: 400;
            color: var(--text-muted);
        }
        .pricing-card .renewal {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 0.5rem;
        }
        .pricing-card .badge-popular {
            position: absolute;
            top: -12px;
            right: 20px;
            background: linear-gradient(135deg, var(--secondary), #ef4444);
            color: #fff;
            padding: 0.25rem 1rem;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
        }

        /* ===== 标签 / 徽章 ===== */
        .badge {
            display: inline-block;
            padding: 0.2rem 0.9rem;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
            border: 1px solid rgba(42, 109, 244, 0.15);
        }
        .badge-green {
            background: #dcfce7;
            color: #16a34a;
            border-color: rgba(22, 163, 74, 0.15);
        }
        .badge-orange {
            background: #fff7ed;
            color: #ea580c;
            border-color: rgba(234, 88, 12, 0.15);
        }
        .badge-purple {
            background: #f3e8ff;
            color: #9333ea;
            border-color: rgba(147, 51, 234, 0.15);
        }

        /* ===== 流程步骤 ===== */
        .step-item {
            display: flex;
            gap: 1.2rem;
            align-items: flex-start;
            padding: 1.2rem 0;
            border-bottom: 1px solid var(--border-light);
        }
        .step-item:last-child {
            border-bottom: none;
        }
        .step-number {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
        }
        .step-content h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 0.2rem;
        }
        .step-content p {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 1.2rem 0;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0.3rem 0;
            color: var(--text-primary);
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            transition: transform var(--transition);
            color: var(--text-muted);
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding-top: 0.6rem;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA 区块 ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark), #1e293b);
            padding: 4rem 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(ellipse at 30% 50%, rgba(42, 109, 244, 0.08) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(6, 182, 212, 0.06) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-section h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 1rem;
            position: relative;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.6);
            max-width: 560px;
            margin: 0 auto 2rem;
            font-size: 1rem;
            position: relative;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-darker);
            color: rgba(255, 255, 255, 0.6);
            padding: 4rem 0 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand .nav-logo {
            color: #fff;
            margin-bottom: 1rem;
            font-size: 1.2rem;
        }
        .footer-brand p {
            font-size: 0.85rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.45);
            max-width: 320px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 1rem;
            letter-spacing: 0.02em;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.45);
            font-size: 0.85rem;
            padding: 0.3rem 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: #60a5fa;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 1rem;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.3);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.3);
        }
        .footer-bottom a:hover {
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .pricing-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .site-header {
                padding: 0.5rem 0.8rem;
            }
            .nav-dock {
                padding: 0.4rem 1rem;
                border-radius: 40px;
            }
            .nav-links {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-cta-desktop {
                display: none;
            }
            .mobile-drawer {
                display: flex;
            }

            .hero-banner {
                min-height: 50vh;
                padding: 6rem 1.2rem 3rem;
            }

            .section {
                padding: 3rem 0;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .pricing-grid {
                grid-template-columns: 1fr;
                max-width: 400px;
                margin: 0 auto;
            }

            .hero-banner-content .hero-badges {
                gap: 0.5rem;
            }
            .hero-banner-content .hero-badges span {
                font-size: 0.75rem;
                padding: 0.3rem 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .nav-dock {
                padding: 0.3rem 0.8rem;
                border-radius: 32px;
            }
            .nav-logo {
                font-size: 1.05rem;
            }
            .nav-logo i {
                font-size: 1rem;
            }
            .hero-banner-content h1 {
                font-size: 1.8rem;
            }
            .btn {
                padding: 0.6rem 1.4rem;
                font-size: 0.85rem;
            }
            .card {
                padding: 1.2rem;
            }
            .pricing-card {
                padding: 1.5rem 1.2rem;
            }
            .pricing-card .domain-ext {
                font-size: 1.5rem;
            }
            .pricing-card .price {
                font-size: 2rem;
            }
        }

        @media (min-width: 769px) {
            .mobile-drawer {
                display: none !important;
            }
            .mobile-toggle {
                display: none !important;
            }
        }

        /* ===== 工具类 ===== */
        .gap-1 {
            gap: 0.5rem;
        }
        .gap-2 {
            gap: 1rem;
        }
        .gap-3 {
            gap: 1.5rem;
        }
        .gap-4 {
            gap: 2rem;
        }
        .mt-1 {
            margin-top: 0.5rem;
        }
        .mt-2 {
            margin-top: 1rem;
        }
        .mt-3 {
            margin-top: 1.5rem;
        }
        .mt-4 {
            margin-top: 2rem;
        }
        .mb-1 {
            margin-bottom: 0.5rem;
        }
        .mb-2 {
            margin-bottom: 1rem;
        }
        .mb-3 {
            margin-bottom: 1.5rem;
        }
        .mb-4 {
            margin-bottom: 2rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.2rem;
        }

        @media (max-width: 1024px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 动画 ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-in-up {
            animation: fadeInUp 0.6s ease forwards;
        }
        .animate-fade-in-up-delay-1 {
            animation-delay: 0.1s;
        }
        .animate-fade-in-up-delay-2 {
            animation-delay: 0.2s;
        }
        .animate-fade-in-up-delay-3 {
            animation-delay: 0.3s;
        }
        .animate-fade-in-up-delay-4 {
            animation-delay: 0.4s;
        }

/* roulang page: category3 */
/* ===== Design Variables ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --primary-light: #60a5fa;
            --primary-gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --accent: #10b981;
            --bg-dark: #0f172a;
            --bg-darker: #020617;
            --bg-card: #1e293b;
            --bg-section: #f8fafc;
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-light: #94a3b8;
            --text-white: #ffffff;
            --border-color: #e2e8f0;
            --border-light: rgba(255, 255, 255, 0.08);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-glow: 0 0 30px rgba(37, 99, 235, 0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

        /* ===== 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);
            background: #ffffff;
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        button { cursor: pointer; border: none; background: none; font-family: inherit; }
        input, textarea { font-family: inherit; outline: none; }
        ul { list-style: none; }

        /* ===== Container ===== */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container-custom { padding: 0 16px; }
        }

        /* ===== Floating Dock Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 14px 24px;
            pointer-events: none;
            transition: var(--transition);
        }
        .site-header .nav-dock {
            max-width: 900px;
            margin: 0 auto;
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 60px;
            padding: 8px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            pointer-events: auto;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.25);
            transition: var(--transition);
        }
        .site-header .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-white);
            font-weight: 700;
            font-size: 1.25rem;
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .site-header .nav-logo i {
            font-size: 1.4rem;
            color: var(--primary-light);
        }
        .site-header .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .site-header .nav-links a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.85rem;
            font-weight: 500;
            padding: 6px 14px;
            border-radius: 40px;
            transition: var(--transition);
            white-space: nowrap;
            letter-spacing: 0.2px;
        }
        .site-header .nav-links a:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.08);
        }
        .site-header .nav-links a.active {
            color: #ffffff;
            background: var(--primary-gradient);
            box-shadow: 0 2px 12px rgba(37, 99, 235, 0.35);
        }
        .site-header .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .site-header .nav-actions .search-toggle {
            color: rgba(255, 255, 255, 0.5);
            font-size: 1rem;
            padding: 6px 10px;
            border-radius: 40px;
            transition: var(--transition);
        }
        .site-header .nav-actions .search-toggle:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.08);
        }
        .site-header .nav-actions .btn-cta {
            background: var(--primary-gradient);
            color: #ffffff;
            font-size: 0.8rem;
            font-weight: 600;
            padding: 7px 18px;
            border-radius: 40px;
            transition: var(--transition);
            box-shadow: 0 2px 12px rgba(37, 99, 235, 0.3);
        }
        .site-header .nav-actions .btn-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 20px rgba(37, 99, 235, 0.45);
        }
        .site-header .mobile-toggle {
            display: none;
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.3rem;
            padding: 4px 8px;
        }

        /* Mobile Nav */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(2, 6, 23, 0.8);
            backdrop-filter: blur(10px);
            z-index: 999;
            padding: 80px 24px 40px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 16px;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .mobile-nav-overlay.open {
            display: flex;
            opacity: 1;
        }
        .mobile-nav-overlay a {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.3rem;
            font-weight: 500;
            padding: 10px 30px;
            border-radius: 40px;
            transition: var(--transition);
        }
        .mobile-nav-overlay a:hover,
        .mobile-nav-overlay a.active {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.08);
        }
        .mobile-nav-overlay .close-mobile {
            position: absolute;
            top: 24px;
            right: 24px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 1.8rem;
        }

        @media (max-width: 820px) {
            .site-header .nav-links { display: none; }
            .site-header .nav-actions .btn-cta { display: none; }
            .site-header .mobile-toggle { display: block; }
            .site-header .nav-dock { padding: 8px 16px; border-radius: 40px; }
        }
        @media (min-width: 821px) {
            .mobile-nav-overlay { display: none !important; }
        }

        /* ===== Banner / Hero (内页) ===== */
        .page-banner {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 24px 60px;
            background: var(--bg-dark);
            overflow: hidden;
        }
        .page-banner .banner-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.25;
            transform: scale(1.05);
        }
        .page-banner .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(2, 6, 23, 0.7) 100%);
        }
        .page-banner .banner-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .page-banner .banner-badge {
            display: inline-block;
            background: rgba(37, 99, 235, 0.2);
            color: var(--primary-light);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 40px;
            border: 1px solid rgba(37, 99, 235, 0.25);
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .page-banner h1 {
            color: #ffffff;
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
        .page-banner p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .page-banner .banner-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 8px;
        }
        .page-banner .banner-stats .stat-item {
            text-align: center;
        }
        .page-banner .banner-stats .stat-number {
            color: #ffffff;
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        .page-banner .banner-stats .stat-label {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.8rem;
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .page-banner { min-height: 280px; padding: 100px 16px 40px; }
            .page-banner h1 { font-size: 1.9rem; }
            .page-banner p { font-size: 0.95rem; }
            .page-banner .banner-stats { gap: 24px; }
            .page-banner .banner-stats .stat-number { font-size: 1.4rem; }
        }

        /* ===== Section Spacing ===== */
        .section-block {
            padding: 80px 0;
        }
        .section-block.alt-bg {
            background: var(--bg-section);
        }
        .section-block.dark-bg {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 600px;
            line-height: 1.7;
        }
        .section-label {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 8px;
        }
        .dark-bg .section-subtitle { color: rgba(255, 255, 255, 0.6); }
        .dark-bg .section-label { color: var(--primary-light); }

        @media (max-width: 768px) {
            .section-block { padding: 50px 0; }
            .section-title { font-size: 1.6rem; }
        }

        /* ===== Cards ===== */
        .service-card {
            background: #ffffff;
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            height: 100%;
        }
        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .service-card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: rgba(37, 99, 235, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
            margin-bottom: 16px;
            transition: var(--transition);
        }
        .service-card:hover .card-icon {
            background: var(--primary-gradient);
            color: #ffffff;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
        }
        .service-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            letter-spacing: -0.2px;
        }
        .service-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }
        .service-card .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 14px;
        }
        .service-card .card-tags span {
            background: var(--bg-section);
            color: var(--text-secondary);
            font-size: 0.7rem;
            font-weight: 500;
            padding: 2px 10px;
            border-radius: 40px;
            border: 1px solid var(--border-color);
        }

        /* Dark card variant */
        .dark-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: var(--transition);
            height: 100%;
        }
        .dark-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(37, 99, 235, 0.3);
        }
        .dark-card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(37, 99, 235, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--primary-light);
            margin-bottom: 14px;
        }
        .dark-card h3 {
            color: #ffffff;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .dark-card p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
            line-height: 1.65;
        }

        /* ===== Feature Row ===== */
        .feature-row {
            display: flex;
            align-items: center;
            gap: 60px;
            margin-bottom: 60px;
        }
        .feature-row.reverse {
            flex-direction: row-reverse;
        }
        .feature-row .feature-image {
            flex: 0 0 46%;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .feature-row .feature-image img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            display: block;
        }
        .feature-row .feature-content {
            flex: 1;
        }
        .feature-row .feature-content h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .feature-row .feature-content p {
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .feature-row .feature-content .feature-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .feature-row .feature-content .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-primary);
        }
        .feature-row .feature-content .feature-list li i {
            color: var(--accent);
            margin-top: 3px;
            font-size: 0.85rem;
        }

        @media (max-width: 900px) {
            .feature-row { flex-direction: column !important; gap: 30px; }
            .feature-row .feature-image { flex: 0 0 100%; width: 100%; }
            .feature-row .feature-image img { height: 220px; }
            .feature-row .feature-content h3 { font-size: 1.25rem; }
        }

        /* ===== Flow / Steps ===== */
        .flow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }
        .flow-step {
            text-align: center;
            padding: 28px 16px;
            background: #ffffff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
        }
        .flow-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .flow-step .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-gradient);
            color: #ffffff;
            font-weight: 800;
            font-size: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
        }
        .flow-step h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .flow-step p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .flow-step .step-arrow {
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--primary-light);
            font-size: 1.2rem;
            opacity: 0.4;
        }
        .flow-step:last-child .step-arrow { display: none; }

        @media (max-width: 900px) {
            .flow-steps { grid-template-columns: repeat(2, 1fr); }
            .flow-step .step-arrow { display: none; }
        }
        @media (max-width: 520px) {
            .flow-steps { grid-template-columns: 1fr; }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(37, 99, 235, 0.2);
        }
        .faq-item .faq-question {
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            gap: 12px;
            user-select: none;
        }
        .faq-item .faq-question i {
            color: var(--primary);
            transition: transform 0.3s ease;
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 22px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }
        .dark-bg .faq-item {
            background: var(--bg-card);
            border-color: var(--border-light);
        }
        .dark-bg .faq-item .faq-question { color: #ffffff; }
        .dark-bg .faq-item .faq-answer { color: rgba(255, 255, 255, 0.6); }
        .dark-bg .faq-item .faq-question i { color: var(--primary-light); }

        /* ===== CTA ===== */
        .cta-block {
            background: var(--primary-gradient);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-block h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            position: relative;
            letter-spacing: -0.3px;
        }
        .cta-block p {
            font-size: 1rem;
            opacity: 0.85;
            max-width: 500px;
            margin: 0 auto 28px;
            line-height: 1.7;
            position: relative;
        }
        .cta-block .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
        }
        .cta-block .btn-primary {
            background: #ffffff;
            color: var(--primary);
            font-weight: 700;
            padding: 12px 32px;
            border-radius: 40px;
            font-size: 0.95rem;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .cta-block .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
        }
        .cta-block .btn-outline {
            background: transparent;
            color: #ffffff;
            font-weight: 600;
            padding: 12px 32px;
            border-radius: 40px;
            font-size: 0.95rem;
            border: 2px solid rgba(255, 255, 255, 0.3);
            transition: var(--transition);
        }
        .cta-block .btn-outline:hover {
            border-color: #ffffff;
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .cta-block { padding: 36px 20px; border-radius: var(--radius-md); }
            .cta-block h2 { font-size: 1.5rem; }
        }

        /* ===== Footer (shared) ===== */
        .site-footer {
            background: var(--bg-darker);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .site-footer .footer-brand .nav-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #ffffff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .site-footer .footer-brand .nav-logo i { color: var(--primary-light); }
        .site-footer .footer-brand p {
            font-size: 0.85rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.5);
            max-width: 320px;
        }
        .site-footer .footer-col h4 {
            color: #ffffff;
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .site-footer .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.45);
            font-size: 0.85rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .site-footer .footer-col a:hover {
            color: #ffffff;
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.3);
            flex-wrap: wrap;
            gap: 8px;
        }
        @media (max-width: 820px) {
            .site-footer .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
            .site-footer .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            .site-footer .footer-grid { grid-template-columns: 1fr; }
            .site-footer .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Utility ===== */
        .text-gradient {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .badge-pill {
            display: inline-block;
            padding: 2px 14px;
            border-radius: 40px;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .gap-grid { gap: 24px; }

        /* ===== Tag Cloud ===== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .tag-cloud a {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 40px;
            padding: 6px 18px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .tag-cloud a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(37, 99, 235, 0.04);
            transform: translateY(-2px);
        }
        .dark-bg .tag-cloud a {
            background: var(--bg-card);
            border-color: var(--border-light);
            color: rgba(255, 255, 255, 0.6);
        }
        .dark-bg .tag-cloud a:hover {
            border-color: var(--primary-light);
            color: var(--primary-light);
            background: rgba(37, 99, 235, 0.12);
        }

        /* ===== Case Card ===== */
        .case-card {
            background: #ffffff;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            height: 100%;
        }
        .case-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .case-card .case-img {
            height: 200px;
            overflow: hidden;
        }
        .case-card .case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .case-card:hover .case-img img {
            transform: scale(1.05);
        }
        .case-card .case-body {
            padding: 20px 22px 22px;
        }
        .case-card .case-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .case-card .case-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .case-card .case-body .case-tag {
            display: inline-block;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
            font-size: 0.7rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 40px;
        }

        @media (max-width: 768px) {
            .case-card .case-img { height: 160px; }
        }

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

        @media (max-width: 900px) {
            .grid-3 { grid-template-columns: repeat(2, 1fr); }
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
        }

        /* Skeleton shimmer (备用) */
        .shimmer {
            background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
            background-size: 200% 100%;
            animation: shimmer 1.5s infinite;
            border-radius: 4px;
        }
        @keyframes shimmer {
            0% { background-position: 200% 0; }
            100% { background-position: -200% 0; }
        }

/* roulang page: category2 */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --secondary: #0ea5e9;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg-body: #ffffff;
            --bg-alt: #f8fafc;
            --bg-dark: #0f172a;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
            --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
            --shadow-xl: 0 35px 60px -15px rgba(0, 0, 0, 0.2);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg-body);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            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:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        @media (min-width: 768px) {
            .container-custom {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        @media (min-width: 1024px) {
            .container-custom {
                padding-left: 2.5rem;
                padding-right: 2.5rem;
            }
        }

        /* ===== Dock 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0.75rem 1rem;
            background: transparent;
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
        }

        .dock-nav {
            max-width: 1100px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(24px) saturate(180%);
            -webkit-backdrop-filter: blur(24px) saturate(180%);
            border-radius: 60px;
            padding: 0.5rem 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06), inset 0 1px 0 rgba(255, 255, 255, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.3);
            transition: var(--transition);
        }

        .site-header.scrolled .dock-nav {
            background: rgba(255, 255, 255, 0.92);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-main);
            letter-spacing: -0.02em;
        }
        .nav-logo i {
            color: var(--primary);
            font-size: 1.4rem;
        }
        .nav-logo span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-links a {
            padding: 0.5rem 1rem;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--text-main);
            background: rgba(37, 99, 235, 0.06);
        }
        .nav-links a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }
        .nav-links a.active:hover {
            background: var(--primary-dark);
            color: #fff;
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .nav-cta .search-btn {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            border: none;
            background: rgba(0, 0, 0, 0.04);
            color: var(--text-muted);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
            font-size: 0.95rem;
        }
        .nav-cta .search-btn:hover {
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary);
        }
        .nav-cta .cta-btn {
            padding: 0.5rem 1.4rem;
            border-radius: 40px;
            border: none;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 600;
            font-size: 0.85rem;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
        }
        .nav-cta .cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
        }

        .mobile-toggle {
            display: none;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            border: none;
            background: rgba(0, 0, 0, 0.04);
            color: var(--text-main);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .mobile-toggle:hover {
            background: rgba(37, 99, 235, 0.1);
        }

        @media (max-width: 900px) {
            .nav-links {
                display: none;
                position: absolute;
                top: calc(100% + 8px);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.96);
                backdrop-filter: blur(20px);
                border-radius: 24px;
                padding: 0.75rem;
                flex-direction: column;
                gap: 0.25rem;
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
                border: 1px solid var(--border);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                width: 100%;
                text-align: center;
                padding: 0.7rem 1rem;
            }
            .mobile-toggle {
                display: flex;
            }
            .dock-nav {
                padding: 0.4rem 1rem;
                border-radius: 40px;
            }
            .nav-cta .cta-btn {
                padding: 0.4rem 1rem;
                font-size: 0.8rem;
            }
            .nav-cta .search-btn {
                width: 34px;
                height: 34px;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 520px) {
            .site-header {
                padding: 0.5rem 0.6rem;
            }
            .dock-nav {
                padding: 0.3rem 0.8rem;
                border-radius: 32px;
            }
            .nav-logo {
                font-size: 1.05rem;
            }
            .nav-logo i {
                font-size: 1.1rem;
            }
            .nav-cta .cta-btn {
                display: none;
            }
            .nav-cta .search-btn {
                width: 30px;
                height: 30px;
                font-size: 0.8rem;
            }
        }

        /* ===== 页面通用 ===== */
        .section-padding {
            padding: 5rem 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 3rem 0;
            }
        }
        @media (max-width: 520px) {
            .section-padding {
                padding: 2.5rem 0;
            }
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: var(--text-main);
            margin-bottom: 0.75rem;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.7rem;
            }
            .section-subtitle {
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .section-title {
                font-size: 1.4rem;
            }
            .section-subtitle {
                font-size: 0.9rem;
            }
        }

        .badge {
            display: inline-block;
            padding: 0.3rem 1rem;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
            letter-spacing: 0.01em;
        }
        .badge-accent {
            background: #fef3c7;
            color: #b45309;
        }
        .badge-success {
            background: #d1fae5;
            color: #065f46;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: 60px;
            border: none;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(37, 99, 235, 0.35);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0px);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.8rem;
            border-radius: 60px;
            border: 2px solid var(--border);
            background: transparent;
            color: var(--text-main);
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-bg);
            transform: translateY(-2px);
        }

        .card {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--border);
        }

        /* ===== Hero Banner ===== */
        .page-hero {
            position: relative;
            padding: 9rem 0 4.5rem;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.15), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-hero .hero-content {
            position: relative;
            z-index: 2;
        }
        .page-hero .badge {
            background: rgba(255, 255, 255, 0.12);
            color: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin: 1rem 0 1rem;
        }
        .page-hero p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 600px;
            line-height: 1.7;
        }
        .page-hero .hero-stats {
            display: flex;
            gap: 2.5rem;
            margin-top: 2rem;
            flex-wrap: wrap;
        }
        .page-hero .hero-stats .stat-item {
            color: #fff;
        }
        .page-hero .hero-stats .stat-item .num {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #60a5fa, #a78bfa);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-hero .hero-stats .stat-item .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 0.2rem;
        }
        @media (max-width: 768px) {
            .page-hero {
                padding: 7rem 0 3rem;
                min-height: 300px;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero p {
                font-size: 0.95rem;
            }
            .page-hero .hero-stats {
                gap: 1.5rem;
            }
            .page-hero .hero-stats .stat-item .num {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .page-hero .hero-stats {
                gap: 1rem;
            }
            .page-hero .hero-stats .stat-item .num {
                font-size: 1.2rem;
            }
        }

        /* ===== 板块: 服务卡片网格 ===== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .service-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 2rem 1.5rem;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            text-align: center;
        }
        .service-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
            border-color: var(--primary-bg);
        }
        .service-card .icon-box {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            margin: 0 auto 1.2rem;
            transition: var(--transition);
        }
        .service-card:hover .icon-box {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }
        .service-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-main);
        }
        .service-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }
        .service-card .tag-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.4rem;
            margin-top: 1rem;
        }
        .service-card .tag {
            padding: 0.2rem 0.7rem;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--bg-alt);
            color: var(--text-muted);
        }
        @media (max-width: 900px) {
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .service-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .service-card {
                padding: 1.5rem 1.2rem;
            }
            .service-card .icon-box {
                width: 50px;
                height: 50px;
                font-size: 1.3rem;
            }
        }

        /* ===== 板块: 方案列表 ===== */
        .plan-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .plan-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 2rem 1.5rem;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .plan-card.featured {
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.08), var(--shadow-md);
        }
        .plan-card.featured::before {
            content: '推荐';
            position: absolute;
            top: 1rem;
            right: -1.8rem;
            background: var(--primary);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 0.2rem 2.5rem;
            transform: rotate(45deg);
            letter-spacing: 0.05em;
        }
        .plan-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .plan-card .plan-name {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-muted);
            margin-bottom: 0.25rem;
        }
        .plan-card .plan-price {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.02em;
            margin: 0.5rem 0;
        }
        .plan-card .plan-price small {
            font-size: 0.9rem;
            font-weight: 400;
            color: var(--text-muted);
        }
        .plan-card .plan-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 1.2rem;
        }
        .plan-card .plan-features {
            list-style: none;
            padding: 0;
            margin: 0 0 1.5rem;
        }
        .plan-card .plan-features li {
            font-size: 0.88rem;
            color: var(--text-main);
            padding: 0.4rem 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .plan-card .plan-features li i {
            color: var(--primary);
            font-size: 0.8rem;
            width: 1rem;
        }
        .plan-card .btn-primary {
            width: 100%;
            justify-content: center;
            padding: 0.7rem 1rem;
            font-size: 0.9rem;
        }
        @media (max-width: 900px) {
            .plan-list {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .plan-list {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .plan-card {
                padding: 1.5rem 1.2rem;
            }
            .plan-card .plan-price {
                font-size: 1.8rem;
            }
        }

        /* ===== 板块: 数据中心 ===== */
        .dc-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1rem;
        }
        .dc-item {
            background: #fff;
            border-radius: var(--radius-sm);
            padding: 1.2rem 1rem;
            border: 1px solid var(--border-light);
            text-align: center;
            transition: var(--transition);
        }
        .dc-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--primary-bg);
            transform: translateY(-2px);
        }
        .dc-item .dc-icon {
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 0.4rem;
        }
        .dc-item .dc-name {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-main);
        }
        .dc-item .dc-region {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        @media (max-width: 900px) {
            .dc-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .dc-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 0.75rem;
            }
            .dc-item {
                padding: 0.8rem 0.6rem;
            }
            .dc-item .dc-icon {
                font-size: 1.3rem;
            }
            .dc-item .dc-name {
                font-size: 0.85rem;
            }
        }

        /* ===== 板块: 流程步骤 ===== */
        .steps-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            position: relative;
        }
        .steps-row::after {
            content: '';
            position: absolute;
            top: 2.5rem;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
            z-index: 0;
            border-radius: 2px;
        }
        .step-item {
            position: relative;
            z-index: 1;
            text-align: center;
            background: #fff;
            padding: 1.5rem 1rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .step-item .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.2);
        }
        .step-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 0.3rem;
        }
        .step-item p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.5;
        }
        @media (max-width: 900px) {
            .steps-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-row::after {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .steps-row {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .step-item {
                padding: 1.2rem 0.8rem;
            }
        }

        /* ===== 板块: FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
            padding: 1.2rem 0;
        }
        .faq-item:first-child {
            padding-top: 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-main);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            padding: 0.3rem 0;
            transition: var(--transition);
            gap: 1rem;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-question.open 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 1.5rem 0 0;
        }
        .faq-answer.open {
            max-height: 300px;
            padding-top: 0.6rem;
        }
        .faq-answer p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
        }
        @media (max-width: 520px) {
            .faq-question {
                font-size: 0.95rem;
            }
            .faq-answer p {
                font-size: 0.88rem;
            }
        }

        /* ===== 板块: CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            border-radius: var(--radius-lg);
            padding: 3.5rem 3rem;
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.12), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-block::after {
            content: '';
            position: absolute;
            bottom: -40%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(14, 165, 233, 0.1), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-block h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.75rem;
            position: relative;
            z-index: 1;
        }
        .cta-block p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.65);
            max-width: 560px;
            margin: 0 auto 1.5rem;
            position: relative;
            z-index: 1;
        }
        .cta-block .btn-primary {
            position: relative;
            z-index: 1;
            padding: 0.9rem 2.5rem;
            font-size: 1.05rem;
            background: linear-gradient(135deg, #f59e0b, #f97316);
            box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
        }
        .cta-block .btn-primary:hover {
            box-shadow: 0 12px 36px rgba(245, 158, 11, 0.4);
        }
        @media (max-width: 768px) {
            .cta-block {
                padding: 2.5rem 1.5rem;
            }
            .cta-block h2 {
                font-size: 1.5rem;
            }
            .cta-block p {
                font-size: 0.95rem;
            }
        }
        @media (max-width: 520px) {
            .cta-block {
                padding: 2rem 1.2rem;
                border-radius: var(--radius);
            }
            .cta-block h2 {
                font-size: 1.3rem;
            }
            .cta-block .btn-primary {
                padding: 0.7rem 1.8rem;
                font-size: 0.9rem;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.7);
            padding: 4rem 0 2rem;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand .nav-logo {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 0.8rem;
        }
        .footer-brand .nav-logo i {
            color: #60a5fa;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.5);
            max-width: 360px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.5);
            padding: 0.3rem 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: #60a5fa;
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.8rem;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
        }
        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer {
                padding: 2.5rem 0 1.5rem;
            }
        }

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

        .bg-alt {
            background: var(--bg-alt);
        }
        .bg-white {
            background: #fff;
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin-bottom: 1.5rem;
        }
        .divider-center {
            margin-left: auto;
            margin-right: auto;
        }