/* roulang page: index */
:root {
  --primary: #0f1b2d;
  --primary-light: #1a2d4a;
  --accent: #c9a84c;
  --accent-hover: #dbb95c;
  --accent-dark: #b8963a;
  --bg: #f7f6f2;
  --bg-card: #ffffff;
  --bg-dark: #0a1421;
  --text: #1a1a2e;
  --text-light: #5a5a7a;
  --text-muted: #8a8aa0;
  --border: #e8e5dd;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
  --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
  --tab-height: 64px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.6; padding-top: var(--header-height); padding-bottom: var(--tab-height); }
@media (min-width: 769px) { body { padding-bottom: 0; } }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-dark); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
ul, ol { list-style: none; }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
@media (max-width: 768px) { .container { padding: 0 16px; } }

/* Header & Desktop Nav */
.header { position: fixed; top: 0; left: 0; width: 100%; height: var(--header-height); background: rgba(255,255,255,0.96); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); z-index: 1000; display: flex; align-items: center; }
.header-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.logo { font-size: 1.35rem; font-weight: 700; color: var(--primary); letter-spacing: 0.5px; display: flex; align-items: center; gap: 8px; }
.logo i { color: var(--accent); font-size: 1.5rem; }
.logo span { color: var(--accent); }
.nav-desktop { display: flex; align-items: center; gap: 8px; }
.nav-desktop a { padding: 8px 20px; border-radius: var(--radius-sm); font-size: 0.95rem; font-weight: 500; color: var(--text-light); transition: var(--transition); position: relative; }
.nav-desktop a:hover { color: var(--primary); background: rgba(201,168,76,0.08); }
.nav-desktop a.active { color: var(--primary); background: rgba(201,168,76,0.12); font-weight: 600; }
.nav-desktop a.active::after { content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%); width: 20px; height: 3px; background: var(--accent); border-radius: 4px; }
.header-cta { display: flex; align-items: center; gap: 12px; }
.header-cta .btn { padding: 8px 24px; font-size: 0.9rem; }
@media (max-width: 768px) { .nav-desktop { display: none; } .header-cta .btn { padding: 6px 16px; font-size: 0.85rem; } }

/* Mobile Bottom Tab */
.mobile-tab { position: fixed; bottom: 0; left: 0; width: 100%; height: var(--tab-height); background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); border-top: 1px solid var(--border); display: none; z-index: 1000; justify-content: center; align-items: center; gap: 0; padding: 0 8px; }
@media (max-width: 768px) { .mobile-tab { display: flex; } }
.mobile-tab a { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 6px 0; font-size: 0.7rem; color: var(--text-muted); transition: var(--transition); gap: 2px; border-radius: var(--radius-sm); }
.mobile-tab a i { font-size: 1.25rem; }
.mobile-tab a:hover { color: var(--primary); background: rgba(201,168,76,0.06); }
.mobile-tab a.active { color: var(--accent-dark); font-weight: 600; }
.mobile-tab a.active i { color: var(--accent); }
.mobile-tab .tab-label { font-size: 0.65rem; line-height: 1; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 32px; border-radius: var(--radius-sm); font-size: 1rem; font-weight: 600; border: none; cursor: pointer; transition: var(--transition); line-height: 1.4; text-align: center; }
.btn-primary { background: var(--accent); color: var(--primary); }
.btn-primary:hover { background: var(--accent-hover); color: var(--primary); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(201,168,76,0.35); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--border); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent-dark); background: rgba(201,168,76,0.05); }
.btn-lg { padding: 16px 44px; font-size: 1.1rem; border-radius: var(--radius); }
.btn-sm { padding: 8px 20px; font-size: 0.85rem; }

/* Hero */
.hero { position: relative; min-height: 520px; display: flex; align-items: center; background: var(--primary); background-image: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat; opacity: 0.25; mix-blend-mode: overlay; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(15,27,45,0.85) 0%, rgba(15,27,45,0.4) 100%); }
.hero .container { position: relative; z-index: 2; padding-top: 40px; padding-bottom: 40px; }
.hero-content { max-width: 700px; }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(201,168,76,0.18); color: var(--accent); padding: 6px 18px; border-radius: 50px; font-size: 0.85rem; font-weight: 500; margin-bottom: 20px; border: 1px solid rgba(201,168,76,0.25); }
.hero-badge i { font-size: 0.75rem; }
.hero h1 { font-size: 2.8rem; font-weight: 800; color: #ffffff; line-height: 1.2; margin-bottom: 20px; letter-spacing: -0.5px; }
.hero h1 span { color: var(--accent); }
.hero p { font-size: 1.15rem; color: rgba(255,255,255,0.8); line-height: 1.7; margin-bottom: 32px; max-width: 580px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-actions .btn-primary { background: var(--accent); color: var(--primary); }
.hero-actions .btn-outline { border-color: rgba(255,255,255,0.3); color: #ffffff; }
.hero-actions .btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.hero-stats { display: flex; gap: 40px; margin-top: 48px; }
.hero-stat { text-align: left; }
.hero-stat .num { font-size: 1.8rem; font-weight: 800; color: #ffffff; line-height: 1; }
.hero-stat .num span { color: var(--accent); }
.hero-stat .label { font-size: 0.85rem; color: rgba(255,255,255,0.6); margin-top: 4px; }
@media (max-width: 768px) {
  .hero { min-height: 420px; }
  .hero h1 { font-size: 1.8rem; }
  .hero p { font-size: 1rem; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .hero-stat .num { font-size: 1.4rem; }
  .hero-actions .btn { padding: 10px 24px; font-size: 0.9rem; }
}

/* Section common */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-card); }
.section-dark { background: var(--bg-dark); color: #ffffff; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { font-size: 2rem; font-weight: 700; color: var(--primary); margin-bottom: 12px; }
.section-header h2 span { color: var(--accent-dark); }
.section-header p { font-size: 1.05rem; color: var(--text-light); max-width: 600px; margin: 0 auto; line-height: 1.7; }
.section-dark .section-header h2 { color: #ffffff; }
.section-dark .section-header p { color: rgba(255,255,255,0.7); }
@media (max-width: 768px) { .section { padding: 48px 0; } .section-header h2 { font-size: 1.5rem; } }

/* Cards Grid */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 1024px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .card-grid { grid-template-columns: 1fr; } }
.card { background: var(--bg-card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); border: 1px solid var(--border); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.card-img { width: 100%; height: 200px; object-fit: cover; border-radius: 0; }
.card-body { padding: 24px; }
.card-body h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; color: var(--primary); }
.card-body p { font-size: 0.92rem; color: var(--text-light); line-height: 1.6; margin-bottom: 16px; }
.card-meta { display: flex; align-items: center; gap: 12px; font-size: 0.82rem; color: var(--text-muted); }
.card-tag { display: inline-block; padding: 2px 12px; border-radius: 50px; font-size: 0.75rem; font-weight: 600; background: rgba(201,168,76,0.12); color: var(--accent-dark); }
.card-link { font-weight: 600; color: var(--accent-dark); display: inline-flex; align-items: center; gap: 4px; font-size: 0.9rem; }
.card-link i { font-size: 0.75rem; transition: var(--transition); }
.card-link:hover i { transform: translateX(4px); }

/* Feature Cards */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
@media (max-width: 1024px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .feature-grid { grid-template-columns: 1fr; } }
.feature-card { background: var(--bg-card); border-radius: var(--radius); padding: 32px 24px; text-align: center; box-shadow: var(--shadow); border: 1px solid var(--border); transition: var(--transition); }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.feature-card .icon { width: 56px; height: 56px; border-radius: 50%; background: rgba(201,168,76,0.12); display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; font-size: 1.5rem; color: var(--accent); }
.feature-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.feature-card p { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; }

/* Stats / Data */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
@media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; } }
.stat-item { text-align: center; padding: 32px 16px; background: rgba(255,255,255,0.06); border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.08); }
.stat-item .num { font-size: 2.4rem; font-weight: 800; color: var(--accent); line-height: 1.2; }
.stat-item .label { font-size: 0.9rem; color: rgba(255,255,255,0.7); margin-top: 6px; }

/* Steps */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
@media (max-width: 1024px) { .steps-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .steps-grid { grid-template-columns: 1fr; } }
.step-card { text-align: center; padding: 32px 20px; position: relative; }
.step-num { width: 44px; height: 44px; border-radius: 50%; background: var(--accent); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 1.1rem; font-weight: 800; margin: 0 auto 16px; }
.step-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; color: #ffffff; }
.step-card p { font-size: 0.9rem; color: rgba(255,255,255,0.7); line-height: 1.6; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border); padding: 20px 0; }
.faq-item:first-child { border-top: 1px solid var(--border); }
.faq-q { display: flex; justify-content: space-between; align-items: center; cursor: pointer; font-weight: 600; font-size: 1rem; color: var(--primary); padding: 4px 0; }
.faq-q i { color: var(--accent); transition: var(--transition); font-size: 0.9rem; }
.faq-q.open i { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; padding: 0 16px 0 0; color: var(--text-light); font-size: 0.95rem; line-height: 1.7; }
.faq-a.show { max-height: 400px; padding-top: 12px; }

/* CTA */
.cta-section { background: var(--primary); position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; opacity: 0.1; mix-blend-mode: overlay; }
.cta-content { position: relative; z-index: 2; text-align: center; padding: 40px 0; }
.cta-content h2 { font-size: 2rem; font-weight: 700; color: #ffffff; margin-bottom: 12px; }
.cta-content p { font-size: 1.05rem; color: rgba(255,255,255,0.8); max-width: 560px; margin: 0 auto 28px; }
.cta-content .btn { background: var(--accent); color: var(--primary); }
.cta-content .btn:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(201,168,76,0.35); }

/* Footer */
.footer { background: var(--primary); color: rgba(255,255,255,0.7); padding: 48px 0 24px; border-top: 1px solid rgba(255,255,255,0.06); }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
@media (max-width: 768px) { .footer-inner { grid-template-columns: 1fr 1fr; gap: 24px; } }
@media (max-width: 480px) { .footer-inner { grid-template-columns: 1fr; } }
.footer-brand .logo { color: #ffffff; margin-bottom: 12px; font-size: 1.2rem; }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
.footer-col h4 { color: #ffffff; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
.footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 0.88rem; padding: 4px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 20px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.82rem; color: rgba(255,255,255,0.5); }
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--accent); }
@media (max-width: 480px) { .footer-bottom { flex-direction: column; text-align: center; } }

/* Content list (CMS) */
.content-list { display: grid; grid-template-columns: 1fr; gap: 16px; }
.content-item { display: flex; gap: 20px; background: var(--bg-card); padding: 20px 24px; border-radius: var(--radius-sm); border: 1px solid var(--border); transition: var(--transition); }
.content-item:hover { box-shadow: var(--shadow-hover); border-color: var(--accent); }
.content-item .thumb { width: 100px; height: 70px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; }
.content-item .info { flex: 1; }
.content-item .info h3 { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
.content-item .info h3 a { color: var(--primary); }
.content-item .info h3 a:hover { color: var(--accent-dark); }
.content-item .info p { font-size: 0.88rem; color: var(--text-light); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.content-item .meta { display: flex; gap: 16px; font-size: 0.78rem; color: var(--text-muted); margin-top: 6px; }
.content-item .meta .tag { background: rgba(201,168,76,0.1); color: var(--accent-dark); padding: 0 10px; border-radius: 50px; }
@media (max-width: 640px) { .content-item { flex-direction: column; } .content-item .thumb { width: 100%; height: 160px; } }

/* Empty state */
.empty-state { text-align: center; padding: 48px 24px; color: var(--text-muted); }
.empty-state i { font-size: 3rem; margin-bottom: 16px; color: var(--border); }
.empty-state p { font-size: 1rem; }

/* Breadcrumb */
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.88rem; color: var(--text-muted); padding: 16px 0; flex-wrap: wrap; }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent-dark); }
.breadcrumb span { color: var(--text-light); }
.breadcrumb i { font-size: 0.65rem; color: var(--border); }

/* Page banner */
.page-banner { position: relative; min-height: 240px; display: flex; align-items: center; background: var(--primary); background-image: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); overflow: hidden; }
.page-banner .bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat; opacity: 0.2; mix-blend-mode: overlay; }
.page-banner .overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(15,27,45,0.8) 0%, rgba(15,27,45,0.3) 100%); }
.page-banner .container { position: relative; z-index: 2; }
.page-banner h1 { font-size: 2.2rem; font-weight: 800; color: #ffffff; margin-bottom: 8px; }
.page-banner p { font-size: 1.05rem; color: rgba(255,255,255,0.75); max-width: 600px; }
@media (max-width: 768px) { .page-banner { min-height: 180px; } .page-banner h1 { font-size: 1.5rem; } }

/* Article detail */
.article-detail { background: var(--bg-card); border-radius: var(--radius); padding: 40px; box-shadow: var(--shadow); border: 1px solid var(--border); }
.article-detail h1 { font-size: 1.8rem; font-weight: 700; margin-bottom: 16px; }
.article-meta { display: flex; gap: 20px; font-size: 0.88rem; color: var(--text-muted); margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.article-body { font-size: 1rem; line-height: 1.9; color: var(--text); }
.article-body p { margin-bottom: 16px; }
.article-body img { border-radius: var(--radius-sm); margin: 16px 0; }
@media (max-width: 768px) { .article-detail { padding: 24px 16px; } .article-detail h1 { font-size: 1.3rem; } }

/* Category grid for category page */
.cat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
@media (max-width: 640px) { .cat-grid { grid-template-columns: 1fr; } }

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

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a56db;
            --primary-dark: #1243af;
            --primary-light: #e8effd;
            --primary-gradient: linear-gradient(135deg, #1a56db 0%, #0f3b8c 100%);
            --secondary: #0ea5e9;
            --secondary-light: #f0f9ff;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --success: #10b981;
            --success-light: #d1fae5;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
            --shadow-md: 0 8px 32px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 20px 60px rgba(15, 23, 42, 0.10);
            --shadow-hover: 0 12px 40px rgba(26, 86, 219, 0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --spacing-section: 100px;
            --spacing-block: 40px;
            --radius-card: 16px;
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }

        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 头部导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .header.scrolled {
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.06);
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            white-space: nowrap;
            letter-spacing: -0.3px;
        }
        .logo i {
            color: var(--primary);
            font-size: 26px;
        }
        .logo span {
            color: var(--primary);
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-desktop a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-desktop a i {
            font-size: 16px;
        }
        .nav-desktop a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-desktop a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .nav-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: var(--primary);
        }
        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            line-height: 1.2;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary-gradient);
            color: #fff;
            box-shadow: 0 4px 16px rgba(26, 86, 219, 0.25);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #1243af 0%, #0a2d6e 100%);
            box-shadow: 0 8px 28px rgba(26, 86, 219, 0.35);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(26, 86, 219, 0.20);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 14px;
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 17px;
            border-radius: var(--radius);
        }

        /* ===== 移动端底部Tab ===== */
        .mobile-bottom-tab {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 999;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px) saturate(180%);
            -webkit-backdrop-filter: blur(12px) saturate(180%);
            border-top: 1px solid var(--border-light);
            padding: 6px 0 env(safe-area-inset-bottom, 6px);
            box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.04);
        }
        .mobile-bottom-tab .tab-inner {
            display: flex;
            justify-content: space-around;
            align-items: center;
            max-width: 480px;
            margin: 0 auto;
        }
        .mobile-bottom-tab .tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 2px;
            padding: 6px 12px;
            font-size: 11px;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            border-radius: var(--radius-sm);
            min-width: 60px;
        }
        .mobile-bottom-tab .tab-item i {
            font-size: 20px;
            transition: var(--transition);
        }
        .mobile-bottom-tab .tab-item:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .mobile-bottom-tab .tab-item.active {
            color: var(--primary);
            font-weight: 600;
        }
        .mobile-bottom-tab .tab-item.active i {
            transform: scale(1.05);
        }

        /* ===== 页面横幅 ===== */
        .page-banner {
            position: relative;
            background: var(--primary-gradient);
            padding: 80px 0 60px;
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(255, 255, 255, 0.10) 0%, transparent 70%);
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 44px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.10);
        }
        .page-banner p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            margin-bottom: 20px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.70);
        }
        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.80);
        }
        .page-banner .breadcrumb a:hover {
            color: #fff;
        }
        .page-banner .breadcrumb i {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.40);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-title {
            text-align: center;
            margin-bottom: 56px;
        }
        .section-title h2 {
            font-size: 36px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            color: var(--text);
        }
        .section-title p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-title .badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 24px;
        }
        .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .card-body .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .card-body .meta i {
            font-size: 14px;
        }
        .card-body .tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 500;
            background: var(--primary-light);
            color: var(--primary);
            margin-bottom: 8px;
        }
        .card-link {
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card-link:hover {
            gap: 10px;
        }

        /* ===== 网格 ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 24px;
        }
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .section {
                padding: 60px 0;
            }
            .section-title {
                margin-bottom: 36px;
            }
            .section-title h2 {
                font-size: 26px;
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .page-banner p {
                font-size: 15px;
            }
            :root {
                --spacing-section: 60px;
            }
        }

        /* ===== 步骤/流程 ===== */
        .steps {
            display: flex;
            gap: 32px;
            counter-reset: step;
        }
        .step-item {
            flex: 1;
            background: var(--bg-card);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow);
            text-align: center;
            transition: var(--transition);
            position: relative;
            counter-increment: step;
        }
        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .step-item .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-gradient);
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(26, 86, 219, 0.25);
        }
        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .steps {
                flex-direction: column;
                gap: 20px;
            }
        }

        /* ===== 徽章/标签 ===== */
        .badge-pill {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.2px;
        }
        .badge-blue {
            background: var(--primary-light);
            color: var(--primary);
        }
        .badge-green {
            background: var(--success-light);
            color: var(--success);
        }
        .badge-yellow {
            background: var(--accent-light);
            color: var(--accent);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 20px 28px;
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }
        .faq-item .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: 16px;
            color: var(--text);
            gap: 16px;
        }
        .faq-item .faq-q i {
            color: var(--primary);
            font-size: 18px;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item .faq-a {
            margin-top: 12px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-a {
            display: block;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }

        /* ===== CTA ===== */
        .cta-box {
            background: var(--primary-gradient);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-box .container {
            position: relative;
            z-index: 2;
        }
        .cta-box h2 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .cta-box p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-box .btn {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .cta-box .btn:hover {
            background: var(--primary-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.20);
            color: var(--primary-dark);
        }
        @media (max-width: 768px) {
            .cta-box {
                padding: 40px 20px;
            }
            .cta-box h2 {
                font-size: 24px;
            }
            .cta-box p {
                font-size: 15px;
            }
        }

        /* ===== 特色区块（图文） ===== */
        .feature-row {
            display: flex;
            align-items: center;
            gap: 60px;
        }
        .feature-row .feature-img {
            flex: 1;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .feature-row .feature-img img {
            width: 100%;
            height: auto;
            display: block;
        }
        .feature-row .feature-text {
            flex: 1;
        }
        .feature-row .feature-text h3 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .feature-row .feature-text p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .feature-row .feature-text ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .feature-row .feature-text ul li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--text-secondary);
        }
        .feature-row .feature-text ul li i {
            color: var(--success);
            font-size: 16px;
            margin-top: 3px;
            flex-shrink: 0;
        }
        @media (max-width: 768px) {
            .feature-row {
                flex-direction: column;
                gap: 32px;
            }
            .feature-row .feature-text h3 {
                font-size: 22px;
            }
        }

        /* ===== 内容列表 ===== */
        .content-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .content-list .list-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            transition: var(--transition);
        }
        .content-list .list-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow);
            transform: translateX(4px);
        }
        .content-list .list-item .item-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }
        .content-list .list-item .item-text {
            flex: 1;
        }
        .content-list .list-item .item-text h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .content-list .list-item .item-text p {
            font-size: 14px;
            color: var(--text-secondary);
        }
        .content-list .list-item .item-arrow {
            color: var(--text-muted);
            font-size: 18px;
            flex-shrink: 0;
            transition: var(--transition);
        }
        .content-list .list-item:hover .item-arrow {
            color: var(--primary);
            transform: translateX(4px);
        }
        @media (max-width: 768px) {
            .content-list .list-item {
                flex-wrap: wrap;
                gap: 12px;
                padding: 16px;
            }
        }

        /* ===== 统计数字 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .stat-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .stat-item .stat-num {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stat-item .stat-label {
            font-size: 15px;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .stat-item .stat-icon {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 12px;
            opacity: 0.7;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item .stat-num {
                font-size: 28px;
            }
        }
        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.80);
            padding: 60px 0 0;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            color: #fff;
            font-size: 22px;
            margin-bottom: 12px;
        }
        .footer-brand .logo i {
            color: var(--secondary);
        }
        .footer-brand .logo span {
            color: var(--secondary);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.60);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            padding: 6px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-col a i {
            width: 20px;
            margin-right: 6px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.40);
            flex-wrap: wrap;
            gap: 8px;
        }
        @media (max-width: 768px) {
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        /* ===== 响应式导航 ===== */
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .header-cta .btn-sm {
                display: none;
            }
            .mobile-bottom-tab {
                display: block;
            }
            body {
                padding-bottom: 72px;
            }
            .header-inner {
                padding: 0 16px;
            }
            .logo {
                font-size: 18px;
            }
            .logo i {
                font-size: 22px;
            }
        }
        @media (min-width: 769px) {
            .mobile-bottom-tab {
                display: none !important;
            }
            body {
                padding-bottom: 0;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mt-40 {
            margin-top: 40px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        /* ===== 搜索框 ===== */
        .search-box {
            display: flex;
            max-width: 520px;
            margin: 24px auto 0;
            background: #fff;
            border-radius: 50px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .search-box:focus-within {
            box-shadow: 0 0 0 4px rgba(26, 86, 219, 0.10);
            border-color: var(--primary);
        }
        .search-box input {
            flex: 1;
            border: none;
            padding: 14px 20px;
            font-size: 15px;
            outline: none;
            background: transparent;
            color: var(--text);
        }
        .search-box input::placeholder {
            color: var(--text-muted);
        }
        .search-box button {
            padding: 14px 24px;
            background: var(--primary-gradient);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-box button:hover {
            background: linear-gradient(135deg, #1243af 0%, #0a2d6e 100%);
        }

        /* ===== 图片圆角辅助 ===== */
        .img-round {
            border-radius: var(--radius-sm);
        }
        .img-card {
            border-radius: var(--radius-card);
        }

        /* ===== 额外动画 ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-up {
            animation: fadeUp 0.6s ease-out forwards;
        }

/* roulang page: article */
/* ===== CSS Variables ===== */
:root {
  --primary: #1a56db;
  --primary-dark: #1141a8;
  --primary-light: #e8effc;
  --primary-gradient: linear-gradient(135deg, #1a56db 0%, #0f3b8c 100%);
  --secondary: #f59e0b;
  --secondary-light: #fef3c7;
  --accent: #06b6d4;
  --success: #10b981;
  --danger: #ef4444;
  --bg-body: #f8fafc;
  --bg-white: #ffffff;
  --bg-card: #ffffff;
  --bg-dark: #0f172a;
  --bg-section-alt: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-white: #ffffff;
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.10), 0 4px 16px rgba(0,0,0,0.06);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.12);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --header-h: 72px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-top: var(--header-h);
}
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
a { color: inherit; text-decoration: none; transition: var(--transition); }
a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 2px; }
button { cursor: pointer; font: inherit; border: none; background: none; transition: var(--transition); }
button:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
input, textarea, select { font: inherit; border: 1px solid var(--border-color); border-radius: var(--radius-sm); padding: 10px 16px; background: var(--bg-white); transition: var(--transition); color: var(--text-primary); }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,86,219,0.12); }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
p { margin-bottom: 1em; }
::selection { background: var(--primary); color: #fff; }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ===== Header ===== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-h);
  transition: var(--transition);
}
.header.scrolled { background: rgba(255,255,255,0.98); box-shadow: var(--shadow-sm); }
.header-inner {
  max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 100%; gap: 16px;
}
.logo {
  display: flex; align-items: center; gap: 8px;
  font-size: 1.35rem; font-weight: 800; color: var(--text-primary);
  white-space: nowrap;
}
.logo i { color: var(--primary); font-size: 1.5rem; }
.logo span { color: var(--primary); }
.nav-desktop { display: flex; align-items: center; gap: 6px; }
.nav-desktop a {
  padding: 8px 18px; border-radius: 100px; font-size: 0.925rem;
  font-weight: 500; color: var(--text-secondary); white-space: nowrap;
  display: flex; align-items: center; gap: 6px;
  transition: var(--transition);
}
.nav-desktop a:hover { color: var(--primary); background: var(--primary-light); }
.nav-desktop a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.header-cta { display: flex; align-items: center; gap: 10px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 28px; border-radius: 100px; font-size: 0.95rem; font-weight: 600;
  line-height: 1.4; white-space: nowrap; border: 2px solid transparent;
  transition: var(--transition); cursor: pointer; text-align: center;
}
.btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn-primary { background: var(--primary-gradient); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: linear-gradient(135deg, #1141a8 0%, #0a2d6e 100%); border-color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26,86,219,0.30); }
.btn-primary:active { transform: translateY(0); box-shadow: none; }
.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 8px 24px rgba(26,86,219,0.20); }
.btn-sm { padding: 8px 20px; font-size: 0.85rem; }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }

/* ===== Badge / Tag ===== */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 14px; border-radius: 100px; font-size: 0.78rem; font-weight: 600;
  background: var(--primary-light); color: var(--primary);
  white-space: nowrap;
}
.badge-secondary { background: var(--secondary-light); color: #b45309; }
.badge-success { background: #d1fae5; color: #047857; }

/* ===== Article Detail ===== */
.article-banner {
  position: relative;
  background: var(--bg-dark);
  min-height: 280px;
  display: flex; align-items: center;
  overflow: hidden;
}
.article-banner-bg {
  position: absolute; inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover; background-position: center;
  opacity: 0.25;
}
.article-banner .container { position: relative; z-index: 1; padding-top: 40px; padding-bottom: 40px; }
.article-banner .badge { margin-bottom: 16px; }
.article-banner h1 {
  font-size: 2.4rem; font-weight: 800; color: var(--text-white);
  max-width: 800px; line-height: 1.25; margin-bottom: 16px;
}
.article-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 16px;
  color: rgba(255,255,255,0.7); font-size: 0.9rem;
}
.article-meta i { margin-right: 4px; }
.article-meta span { display: flex; align-items: center; gap: 4px; }

.article-main {
  padding: 60px 0 80px;
}
.article-layout {
  display: grid; grid-template-columns: 1fr 320px; gap: 48px; align-items: start;
}

.article-body {
  background: var(--bg-white); border-radius: var(--radius-lg);
  padding: 40px 48px; box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}
.article-body .content {
  font-size: 1.05rem; line-height: 1.9; color: var(--text-secondary);
}
.article-body .content h2 { font-size: 1.6rem; margin-top: 2em; margin-bottom: 0.8em; color: var(--text-primary); }
.article-body .content h3 { font-size: 1.25rem; margin-top: 1.6em; margin-bottom: 0.6em; color: var(--text-primary); }
.article-body .content p { margin-bottom: 1.2em; }
.article-body .content ul, .article-body .content ol { margin-bottom: 1.2em; padding-left: 1.6em; }
.article-body .content li { margin-bottom: 0.4em; list-style: disc; }
.article-body .content img { border-radius: var(--radius-md); margin: 1.5em 0; box-shadow: var(--shadow-sm); }
.article-body .content blockquote {
  border-left: 4px solid var(--primary); background: var(--primary-light);
  padding: 16px 24px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.5em 0; color: var(--text-secondary);
}
.article-body .content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-body .content a:hover { color: var(--primary-dark); }

.article-footer-nav {
  display: flex; justify-content: space-between; gap: 16px;
  margin-top: 40px; padding-top: 32px; border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
}
.article-footer-nav a {
  padding: 10px 24px; border-radius: 100px; background: var(--bg-section-alt);
  font-weight: 500; font-size: 0.9rem; color: var(--text-secondary);
  display: flex; align-items: center; gap: 8px;
  transition: var(--transition);
}
.article-footer-nav a:hover { background: var(--primary-light); color: var(--primary); }

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

.sidebar-card {
  background: var(--bg-white); border-radius: var(--radius-md);
  padding: 24px; box-shadow: var(--shadow-sm); border: 1px solid var(--border-color);
}
.sidebar-card h3 {
  font-size: 1.05rem; font-weight: 700; margin-bottom: 16px;
  display: flex; align-items: center; gap: 8px;
}
.sidebar-card h3 i { color: var(--primary); }

.sidebar-list { display: flex; flex-direction: column; gap: 12px; }
.sidebar-list a {
  display: flex; gap: 12px; padding: 10px 0;
  border-bottom: 1px solid var(--border-light); align-items: flex-start;
}
.sidebar-list a:last-child { border-bottom: none; }
.sidebar-list .thumb {
  width: 60px; height: 60px; border-radius: var(--radius-sm);
  object-fit: cover; flex-shrink: 0; background: var(--bg-section-alt);
}
.sidebar-list .info { flex: 1; min-width: 0; }
.sidebar-list .info .title { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 4px; transition: var(--transition); }
.sidebar-list a:hover .info .title { color: var(--primary); }
.sidebar-list .info .date { font-size: 0.78rem; color: var(--text-muted); }

.sidebar-cta {
  background: var(--primary-gradient); color: #fff; border: none;
  text-align: center; padding: 32px 24px;
}
.sidebar-cta h3 { color: #fff; }
.sidebar-cta p { color: rgba(255,255,255,0.85); font-size: 0.9rem; margin-bottom: 20px; }
.sidebar-cta .btn { background: #fff; color: var(--primary); border-color: #fff; }
.sidebar-cta .btn:hover { background: transparent; color: #fff; }

/* ===== Not Found State ===== */
.not-found-state {
  text-align: center; padding: 80px 24px;
}
.not-found-state i { font-size: 4rem; color: var(--text-muted); margin-bottom: 24px; }
.not-found-state h2 { font-size: 1.8rem; margin-bottom: 12px; }
.not-found-state p { color: var(--text-secondary); max-width: 480px; margin: 0 auto 32px; }

/* ===== Footer ===== */
.footer {
  background: var(--bg-dark); color: rgba(255,255,255,0.8);
  padding: 60px 0 0; margin-top: 0;
}
.footer-inner {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 360px; }
.footer-col h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
.footer-col a {
  display: block; padding: 6px 0; font-size: 0.9rem;
  color: rgba(255,255,255,0.6); transition: var(--transition);
}
.footer-col a:hover { color: #fff; padding-left: 4px; }
.footer-col a i { width: 20px; }
.footer-bottom {
  padding: 24px 0; display: flex; justify-content: space-between;
  align-items: center; flex-wrap: wrap; gap: 12px;
  font-size: 0.85rem; color: rgba(255,255,255,0.4);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .article-banner h1 { font-size: 2rem; }
}
@media (max-width: 768px) {
  :root { --header-h: 64px; }
  .nav-desktop { display: none; }
  .header-cta .btn-sm { padding: 6px 16px; font-size: 0.8rem; }
  .article-banner { min-height: 220px; }
  .article-banner h1 { font-size: 1.6rem; }
  .article-body { padding: 24px 20px; }
  .article-main { padding: 40px 0 60px; }
  .article-sidebar { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .article-banner h1 { font-size: 1.35rem; }
  .article-meta { font-size: 0.8rem; gap: 10px; }
  .article-body { padding: 20px 16px; }
  .article-body .content { font-size: 0.95rem; }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
  .header-inner { padding: 0 16px; }
  .logo { font-size: 1.1rem; }
  .logo i { font-size: 1.2rem; }
}

/* ===== Mobile Bottom Nav ===== */
.mobile-bottom-nav {
  display: none;
}
@media (max-width: 768px) {
  .mobile-bottom-nav {
    display: flex; position: fixed; bottom: 0; left: 0; right: 0; z-index: 999;
    background: rgba(255,255,255,0.95); backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--border-color);
    padding: 6px 0; justify-content: space-around;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.06);
  }
  .mobile-bottom-nav a {
    display: flex; flex-direction: column; align-items: center; gap: 2px;
    padding: 6px 12px; font-size: 0.7rem; color: var(--text-muted);
    transition: var(--transition); border-radius: var(--radius-sm);
    min-width: 56px;
  }
  .mobile-bottom-nav a i { font-size: 1.2rem; }
  .mobile-bottom-nav a.active { color: var(--primary); }
  .mobile-bottom-nav a:hover { color: var(--primary); background: var(--primary-light); }
  body { padding-bottom: 64px; }
}