/* roulang page: index */
:root {
  --primary: #16233a;
  --primary-light: #213453;
  --primary-deep: #0e1725;
  --accent: #f0b90b;
  --accent-hover: #d3a008;
  --accent-soft: rgba(240, 185, 11, 0.12);
  --bg: #f4f6fa;
  --card-bg: #ffffff;
  --text: #161e2e;
  --text-light: #5c6b81;
  --text-lighter: #8a99ae;
  --border: #e3e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 10px rgba(22, 30, 46, 0.05);
  --shadow-md: 0 8px 28px rgba(22, 30, 46, 0.08);
  --shadow-lg: 0 20px 44px rgba(22, 30, 46, 0.12);
  --transition: all 0.3s ease;
  --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, 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-family); background: var(--bg); color: var(--text); line-height: 1.75; font-size: 16px; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; border: none; outline: none; background: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.section-alt { background: var(--card-bg); }

/* header */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.95); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); box-shadow: 0 2px 16px rgba(22,30,46,0.04); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 74px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-icon { width: 40px; height: 40px; border-radius: 10px; background: var(--primary); color: var(--accent); display: flex; align-items: center; justify-content: center; font-size: 18px; box-shadow: 0 4px 12px rgba(22,35,58,0.2); }
.brand-text { font-size: 22px; font-weight: 800; color: var(--primary); letter-spacing: 1px; }
.main-nav { display: flex; align-items: center; gap: 8px; }
.nav-link { position: relative; padding: 8px 18px; font-size: 15px; font-weight: 500; color: var(--text-light); border-radius: var(--radius-sm); }
.nav-link:hover { color: var(--primary); background: rgba(22,35,58,0.04); }
.nav-link.active { color: var(--primary); font-weight: 700; }
.nav-link.active::after { content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%); width: 20px; height: 3px; border-radius: 3px; background: var(--accent); }
.nav-cta { margin-left: 8px; }
.mobile-toggle { display: none; font-size: 20px; color: var(--primary); cursor: pointer; padding: 8px 12px; border-radius: 8px; }
.mobile-toggle:hover { background: rgba(22,35,58,0.06); }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 28px; border-radius: 50px; font-size: 15px; font-weight: 600; cursor: pointer; transition: var(--transition); white-space: nowrap; }
.btn-primary { background: linear-gradient(135deg, #f6c827, var(--accent)); color: var(--primary); box-shadow: 0 4px 16px rgba(240,185,11,0.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(240,185,11,0.45); }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.7); }
.btn-outline:hover { background: rgba(255,255,255,0.12); border-color: #fff; transform: translateY(-2px); }
.btn-dark { background: var(--primary); color: #fff; box-shadow: 0 4px 16px rgba(22,35,58,0.2); }
.btn-dark:hover { background: var(--primary-light); transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--primary); box-shadow: 0 4px 16px rgba(22,30,46,0.1); }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(22,30,46,0.15); }

/* hero */
.hero { position: relative; padding: 130px 0 110px; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 60%, var(--primary-deep) 100%); background-image: url('/assets/images/backpic/back-1.png'); background-size: cover; background-position: center; overflow: hidden; }
.hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(14,23,37,0.88) 0%, rgba(14,23,37,0.65) 50%, rgba(14,23,37,0.35) 100%); }
.hero-content { position: relative; z-index: 2; max-width: 700px; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: var(--accent-soft); border: 1px solid rgba(240,185,11,0.35); color: var(--accent); font-size: 13px; font-weight: 600; padding: 6px 16px; border-radius: 50px; margin-bottom: 24px; }
.hero h1 { color: #fff; font-size: 46px; font-weight: 800; line-height: 1.28; margin-bottom: 20px; letter-spacing: 2px; }
.hero h1 span { color: var(--accent); }
.hero-desc { color: rgba(255,255,255,0.82); font-size: 17px; line-height: 1.8; margin-bottom: 36px; max-width: 560px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 44px; }
.hero-stats { display: flex; gap: 40px; flex-wrap: wrap; padding-top: 36px; border-top: 1px solid rgba(255,255,255,0.14); }
.hero-stat { display: flex; flex-direction: column; }
.hero-stat-num { font-size: 28px; font-weight: 800; color: #fff; }
.hero-stat-label { font-size: 14px; color: rgba(255,255,255,0.6); margin-top: 2px; }

/* cards */
.card { background: var(--card-bg); border-radius: var(--radius); border: 1px solid var(--border); padding: 32px 28px; transition: var(--transition); }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.card-icon { width: 56px; height: 56px; border-radius: 14px; background: var(--accent-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 20px; }
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--text-light); font-size: 14px; line-height: 1.7; }

/* section header */
.sec-header { text-align: center; max-width: 660px; margin: 0 auto 52px; }
.sec-tag { display: inline-block; font-size: 13px; font-weight: 600; color: var(--accent); background: var(--accent-soft); padding: 5px 14px; border-radius: 50px; margin-bottom: 14px; letter-spacing: 1px; }
.sec-header h2 { font-size: 34px; margin-bottom: 12px; }
.sec-header p { color: var(--text-light); font-size: 16px; }

/* features grid */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }

/* category card */
.cat-card { position: relative; border-radius: var(--radius-lg); overflow: hidden; min-height: 260px; display: flex; align-items: flex-end; box-shadow: var(--shadow-sm); }
.cat-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.cat-card:hover img { transform: scale(1.05); }
.cat-card::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 30%, rgba(14,23,37,0.85) 100%); }
.cat-card-content { position: relative; z-index: 2; padding: 28px; color: #fff; width: 100%; }
.cat-card-content h3 { color: #fff; font-size: 22px; margin-bottom: 6px; }
.cat-card-content p { color: rgba(255,255,255,0.75); font-size: 14px; }
.cat-card-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 12px; font-size: 14px; font-weight: 600; color: var(--accent); }
.cat-card-link i { transition: transform 0.3s; }
.cat-card:hover .cat-card-link i { transform: translateX(4px); }

/* news / list */
.news-wrap { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-card { display: flex; gap: 18px; background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; transition: var(--transition); }
.news-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); border-color: transparent; }
.news-content { flex: 1; min-width: 0; }
.news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; flex-wrap: wrap; }
.badge { display: inline-flex; align-items: center; font-size: 12px; font-weight: 600; padding: 3px 12px; border-radius: 50px; background: var(--accent-soft); color: var(--accent); }
.badge-default { background: rgba(22,35,58,0.06); color: var(--text-light); }
.news-content h3 { font-size: 17px; margin-bottom: 6px; line-height: 1.45; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-content p { color: var(--text-light); font-size: 14px; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 8px; }
.news-time { font-size: 13px; color: var(--text-lighter); }
.empty-tip { text-align: center; padding: 48px 20px; color: var(--text-light); font-size: 16px; background: var(--card-bg); border-radius: var(--radius); border: 1px dashed var(--border); }

/* stats dark */
.stats-section { background: var(--primary); background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; background-attachment: fixed; position: relative; }
.stats-section::before { content: ''; position: absolute; inset: 0; background: rgba(14,23,37,0.85); }
.stats-grid { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; text-align: center; }
.stat-block .num { font-size: 42px; font-weight: 800; color: var(--accent); line-height: 1.2; }
.stat-block .label { color: rgba(255,255,255,0.65); font-size: 15px; margin-top: 8px; }

/* topic cards */
.topic-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.topic-card { background: var(--card-bg); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); transition: var(--transition); }
.topic-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.topic-img { position: relative; height: 220px; overflow: hidden; }
.topic-img img { width: 100%; height: 100%; object-fit: cover; }
.topic-body { padding: 28px; }
.topic-body h3 { font-size: 20px; margin-bottom: 10px; }
.topic-body p { color: var(--text-light); font-size: 15px; margin-bottom: 16px; }
.topic-meta { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-lighter); }

/* ranking */
.rank-list { max-width: 800px; margin: 0 auto; }
.rank-item { display: flex; align-items: center; gap: 16px; padding: 18px 24px; background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 14px; transition: var(--transition); }
.rank-item:hover { box-shadow: var(--shadow-sm); border-color: transparent; transform: translateX(6px); }
.rank-num { width: 36px; height: 36px; border-radius: 10px; background: rgba(22,35,58,0.06); display: flex; align-items: center; justify-content: center; font-weight: 700; color: var(--text-light); flex-shrink: 0; }
.rank-item:nth-child(1) .rank-num { background: var(--accent); color: var(--primary); }
.rank-info { flex: 1; min-width: 0; }
.rank-info h4 { font-size: 16px; margin-bottom: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rank-info span { font-size: 13px; color: var(--text-lighter); }
.rank-count { font-size: 14px; color: var(--accent); font-weight: 700; flex-shrink: 0; }

/* faq */
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-item { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 14px; overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: rgba(240,185,11,0.4); }
.faq-item summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 22px 28px; cursor: pointer; font-weight: 600; font-size: 16px; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i { color: var(--accent); transition: transform 0.3s; flex-shrink: 0; }
.faq-item[open] summary i { transform: rotate(180deg); }
.faq-answer { padding: 0 28px 24px; color: var(--text-light); font-size: 15px; line-height: 1.8; }

/* cta */
.cta-section { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); border-radius: var(--radius-lg); padding: 64px 48px; text-align: center; position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; width: 300px; height: 300px; background: rgba(240,185,11,0.1); border-radius: 50%; top: -100px; right: -80px; }
.cta-section::after { content: ''; position: absolute; width: 200px; height: 200px; background: rgba(240,185,11,0.06); border-radius: 50%; bottom: -60px; left: -40px; }
.cta-section h2 { color: #fff; font-size: 30px; margin-bottom: 14px; position: relative; z-index: 2; }
.cta-section p { color: rgba(255,255,255,0.7); max-width: 500px; margin: 0 auto 32px; position: relative; z-index: 2; font-size: 16px; }
.cta-actions { position: relative; z-index: 2; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* footer */
.site-footer { background: var(--primary-deep); color: rgba(255,255,255,0.7); padding: 70px 0 100px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 48px; margin-bottom: 44px; }
.footer-brand .brand-text { color: #fff; }
.footer-brand p { margin-top: 16px; font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.55); }
.footer-title { font-size: 16px; color: #fff; margin-bottom: 20px; font-weight: 600; }
.footer-links a { display: block; padding: 6px 0; font-size: 14px; color: rgba(255,255,255,0.55); }
.footer-links a:hover { color: var(--accent); }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; padding: 6px 0; font-size: 14px; color: rgba(255,255,255,0.55); }
.footer-contact i { color: var(--accent); margin-top: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 28px; display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; font-size: 13px; color: rgba(255,255,255,0.4); }

/* mobile tab */
.mobile-tab-nav { display: none; }

/* breadcrumb */
.breadcrumb { padding: 22px 0; font-size: 14px; color: var(--text-light); background: var(--card-bg); border-bottom: 1px solid var(--border); }
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { margin: 0 8px; color: var(--text-lighter); }
.breadcrumb .current { color: var(--primary); font-weight: 600; }

/* article page */
.article-hero { background: var(--primary); padding: 60px 0 40px; background-image: url('/assets/images/backpic/back-3.png'); background-size: cover; background-position: center; position: relative; }
.article-hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(14,23,37,0.92), rgba(14,23,37,0.7)); }
.article-hero .container { position: relative; z-index: 2; }
.article-title { color: #fff; font-size: 32px; font-weight: 800; margin-bottom: 14px; line-height: 1.35; }
.article-meta { display: flex; gap: 20px; flex-wrap: wrap; color: rgba(255,255,255,0.65); font-size: 14px; }
.article-body { max-width: 860px; margin: 0 auto; padding: 44px 0 20px; }
.article-content { background: var(--card-bg); border-radius: var(--radius-lg); padding: 48px; box-shadow: var(--shadow-sm); }
.article-content p { margin-bottom: 18px; color: var(--text); font-size: 16px; line-height: 1.9; }
.article-content h2 { margin: 32px 0 14px; font-size: 24px; }
.article-content h3 { margin: 26px 0 12px; font-size: 20px; }
.article-content img { border-radius: var(--radius); margin: 18px 0; }
.article-content ul { margin: 16px 0; padding-left: 20px; list-style: disc; }
.article-content ul li { margin-bottom: 8px; }
.article-content blockquote { border-left: 4px solid var(--accent); padding: 16px 20px; background: var(--accent-soft); border-radius: 0 var(--radius) var(--radius) 0; margin: 20px 0; color: var(--text-light); }
.article-notfound { text-align: center; padding: 100px 24px; }
.article-notfound h2 { font-size: 28px; margin-bottom: 16px; }
.article-notfound p { color: var(--text-light); margin-bottom: 24px; }
.related-section { padding: 64px 0; background: var(--card-bg); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

/* category banner */
.cat-banner { padding: 100px 0; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; position: relative; }
.cat-banner::before { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(14,23,37,0.85), rgba(14,23,37,0.55)); }
.cat-banner .container { position: relative; z-index: 2; }
.cat-banner h1 { color: #fff; font-size: 40px; margin-bottom: 16px; }
.cat-banner p { color: rgba(255,255,255,0.75); font-size: 17px; max-width: 600px; }

/* tags */
.tags-group { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.tag-chip { display: inline-flex; align-items: center; gap: 6px; padding: 8px 18px; background: var(--card-bg); border: 1px solid var(--border); border-radius: 50px; font-size: 14px; font-weight: 500; color: var(--text-light); transition: var(--transition); cursor: pointer; }
.tag-chip:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); transform: translateY(-2px); }
.tag-chip i { font-size: 12px; }

/* responsive */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 40px 24px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .hero { padding: 90px 0 80px; }
  .hero h1 { font-size: 34px; }
  .hero-stats { gap: 24px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .news-wrap { grid-template-columns: 1fr; }
  .topic-grid { grid-template-columns: 1fr; }
  .main-nav { display: none; }
  .nav-cta { display: none; }
  .mobile-toggle { display: flex; }
  .mobile-menu-open .main-nav { display: flex; position: absolute; top: 74px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 16px 24px 24px; box-shadow: 0 16px 40px rgba(22,30,46,0.1); }
  .mobile-menu-open .main-nav .nav-link { width: 100%; padding: 14px 16px; }
  .mobile-tab-nav { display: flex; position: fixed; bottom: 0; left: 0; right: 0; background: #fff; border-top: 1px solid var(--border); z-index: 200; padding: 6px 0; box-shadow: 0 -4px 20px rgba(22,30,46,0.06); }
  .tab-item { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; padding: 8px 4px; font-size: 11px; color: var(--text-lighter); border-radius: 10px; transition: var(--transition); }
  .tab-item i { font-size: 18px; }
  .tab-item.active { color: var(--accent); }
  .tab-item.active i { transform: scale(1.1); }
  body { padding-bottom: 68px; }
  .site-footer { padding-bottom: 68px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .article-hero { padding: 44px 0 30px; }
  .article-title { font-size: 24px; }
  .article-content { padding: 28px 20px; }
  .article-meta { gap: 12px; font-size: 13px; }
  .cta-section { padding: 44px 24px; }
  .cta-section h2 { font-size: 24px; }
  .stat-block .num { font-size: 32px; }
  .cat-banner h1 { font-size: 30px; }
  .related-grid { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 28px; }
  .hero-desc { font-size: 15px; }
  .sec-header h2 { font-size: 26px; }
  .hero-stats { gap: 20px; }
  .hero-stat-num { font-size: 22px; }
  .card { padding: 24px 20px; }
  .rank-item { padding: 14px 16px; }
  .rank-info h4 { font-size: 14px; }
  .btn { padding: 10px 20px; font-size: 14px; }
  .topic-body { padding: 20px; }
  .brand-text { font-size: 18px; }
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            --primary: #0f4c81;
            --primary-dark: #0b3a63;
            --primary-light: #e8f0f7;
            --accent: #e67e22;
            --accent-light: #fdf0e3;
            --success: #27ae60;
            --bg: #f7f9fc;
            --bg-white: #ffffff;
            --bg-dark: #0b1d2e;
            --text: #1e2a38;
            --text-light: #5a6b7b;
            --text-lighter: #8a9aab;
            --border: #e3e9f0;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-sm: 0 2px 10px rgba(15, 76, 129, 0.06);
            --shadow-md: 0 8px 30px rgba(15, 76, 129, 0.10);
            --shadow-lg: 0 20px 50px rgba(15, 76, 129, 0.14);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
        }

        /* ========== 基础 Reset ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }

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

        /* ========== 顶部导航 ========== */
        .site-header {
            position: sticky;
            top: 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);
            box-shadow: 0 2px 20px rgba(15, 76, 129, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(15, 76, 129, 0.28);
        }
        .brand-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
        }
        .brand-text span {
            color: var(--accent);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 4px 14px rgba(15, 76, 129, 0.25);
            transition: var(--transition);
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(15, 76, 129, 0.35);
            color: #fff;
        }

        /* 移动端底部 Tab */
        .mobile-tabbar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            border-top: 1px solid var(--border);
            box-shadow: 0 -4px 20px rgba(15, 76, 129, 0.06);
            padding: 6px 8px calc(6px + env(safe-area-inset-bottom));
        }
        .mobile-tabbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-around;
            max-width: 500px;
            margin: 0 auto;
        }
        .tabbar-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 3px;
            padding: 6px 12px;
            border-radius: 14px;
            font-size: 11px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
        }
        .tabbar-item i {
            font-size: 18px;
        }
        .tabbar-item.active {
            color: var(--primary);
            background: var(--primary-light);
        }

        /* ========== 页面横幅 ========== */
        .page-banner {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, #0b1d2e 0%, #0f4c81 55%, #1a6ea8 100%);
            color: #fff;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 60%;
            height: 100%;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -60px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            border: 50px solid rgba(255, 255, 255, 0.04);
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .page-banner h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .page-banner p {
            font-size: 17px;
            line-height: 1.8;
            max-width: 640px;
            opacity: 0.9;
            margin-bottom: 28px;
        }
        .banner-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 36px;
            margin-top: 32px;
        }
        .banner-stat {
            text-align: left;
        }
        .banner-stat strong {
            display: block;
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .banner-stat span {
            font-size: 13px;
            opacity: 0.8;
        }

        /* ========== 通用板块 ========== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 50px;
        }
        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 999px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 14px;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.8;
        }
        .section-title-left {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 40px;
        }
        .section-title-left h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
        }
        .section-title-left p {
            color: var(--text-light);
            margin-top: 6px;
        }
        .section-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            white-space: nowrap;
        }
        .section-link i {
            transition: transform 0.3s;
        }
        .section-link:hover i {
            transform: translateX(4px);
        }

        /* ========== 面包屑 ========== */
        .breadcrumb {
            padding: 16px 0;
            border-bottom: 1px solid var(--border);
            background: var(--bg-white);
        }
        .breadcrumb-inner {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-lighter);
        }
        .breadcrumb-inner a {
            color: var(--text-light);
        }
        .breadcrumb-inner a:hover {
            color: var(--primary);
        }
        .breadcrumb-inner .sep {
            color: var(--border);
        }

        /* ========== 指南标签组 ========== */
        .guide-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }
        .guide-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 999px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .guide-tag i {
            color: var(--accent);
        }
        .guide-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        /* ========== 内容卡片 ========== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .guide-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .guide-card-media {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }
        .guide-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .guide-card:hover .guide-card-media img {
            transform: scale(1.06);
        }
        .guide-card-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            padding: 6px 14px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .guide-card-body {
            padding: 28px;
        }
        .guide-card-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .guide-card-body p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.75;
            margin-bottom: 20px;
        }
        .guide-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 16px;
            border-top: 1px solid var(--border);
        }
        .guide-card-meta span {
            font-size: 13px;
            color: var(--text-lighter);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
        }
        .card-link:hover {
            color: var(--primary);
        }

        /* ========== 流程区块 ========== */
        .steps-section {
            background: linear-gradient(135deg, #0b1d2e 0%, #0f4c81 100%);
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .steps-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.08;
        }
        .steps-section .container {
            position: relative;
            z-index: 2;
        }
        .steps-section .section-header h2 {
            color: #fff;
        }
        .steps-section .section-header p {
            color: rgba(255, 255, 255, 0.75);
        }
        .steps-section .section-eyebrow {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
        }
        .steps-list {
            display: flex;
            justify-content: space-between;
            gap: 30px;
            margin-top: 50px;
            position: relative;
        }
        .steps-list::before {
            content: '';
            position: absolute;
            top: 32px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, rgba(255, 255, 255, 0.3), rgba(230, 126, 34, 0.6), rgba(255, 255, 255, 0.3));
        }
        .step-item {
            flex: 1;
            text-align: center;
            position: relative;
            z-index: 2;
        }
        .step-number {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 800;
            margin: 0 auto 20px;
            box-shadow: 0 0 0 8px rgba(230, 126, 34, 0.25), 0 8px 24px rgba(0, 0, 0, 0.2);
        }
        .step-item:nth-child(2) .step-number {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 0 0 8px rgba(255, 255, 255, 0.2), 0 8px 24px rgba(0, 0, 0, 0.15);
        }
        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .step-item p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
        }

        /* ========== 资讯列表 ========== */
        .content-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .content-row {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .content-row:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .content-row-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }
        .content-row-main {
            flex: 1;
        }
        .content-row-main h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .content-row-main p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 10px;
        }
        .content-row-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-lighter);
        }
        .content-row-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* ========== 数据榜单 ========== */
        .rank-section {
            background: var(--bg-white);
        }
        .rank-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }
        .rank-card {
            background: var(--bg);
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .rank-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .rank-card-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 24px;
        }
        .rank-card-header i {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: var(--accent-light);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
        }
        .rank-card-header h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
        }
        .rank-list {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            background: var(--bg-white);
            transition: var(--transition);
            cursor: default;
        }
        .rank-item:hover {
            background: var(--primary-light);
        }
        .rank-num {
            width: 26px;
            height: 26px;
            border-radius: 8px;
            background: var(--border);
            color: var(--text-light);
            font-size: 13px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .rank-item:nth-child(1) .rank-num {
            background: var(--accent);
            color: #fff;
        }
        .rank-item:nth-child(2) .rank-num {
            background: var(--primary);
            color: #fff;
        }
        .rank-item:nth-child(3) .rank-num {
            background: var(--success);
            color: #fff;
        }
        .rank-item-title {
            flex: 1;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
        }
        .rank-item-num {
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            transition: var(--transition);
            background: none;
            width: 100%;
            text-align: left;
        }
        .faq-question i {
            color: var(--accent);
            font-size: 14px;
            transition: transform 0.3s;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }

        /* ========== CTA 区块 ========== */
        .cta-section {
            padding: 80px 0;
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary) 50%, #1a6ea8);
            color: #fff;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.12;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 14px;
            color: #fff;
        }
        .cta-inner p {
            font-size: 17px;
            opacity: 0.9;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
        }
        .btn-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.2);
            color: var(--primary);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.4);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-3px);
            color: #fff;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .brand-text {
            color: #fff;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            margin-top: 16px;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-title {
            color: #fff;
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 20px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 6px;
        }
        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 12px;
            font-size: 14px;
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-contact i {
            color: var(--accent);
            width: 20px;
            text-align: center;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ========== 焦点可访问性 ========== */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-list {
                flex-wrap: wrap;
            }
            .step-item {
                flex: 1 1 45%;
            }
            .steps-list::before {
                display: none;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }
            .main-nav {
                display: none;
            }
            .mobile-tabbar {
                display: block;
            }
            .page-banner {
                padding: 60px 0 50px;
            }
            .page-banner h1 {
                font-size: 32px;
            }
            .section {
                padding: 60px 0;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .content-list {
                grid-template-columns: 1fr;
            }
            .rank-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
            .section-title-left {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }
            .page-banner h1 {
                font-size: 26px;
            }
            .page-banner p {
                font-size: 15px;
            }
            .banner-stats {
                gap: 20px;
            }
            .banner-stat strong {
                font-size: 24px;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .guide-card-body {
                padding: 20px;
            }
            .steps-list {
                flex-direction: column;
                align-items: center;
            }
            .step-item {
                flex: 1 1 100%;
                max-width: 320px;
            }
            .step-number {
                width: 56px;
                height: 56px;
                margin-bottom: 14px;
            }
            .cta-section {
                padding: 60px 0;
            }
            .cta-inner h2 {
                font-size: 26px;
            }
        }

/* roulang page: article */
:root {
            --primary: #1e3a8a;
            --primary-dark: #172c6b;
            --primary-light: #3b82f6;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg: #f8fafc;
            --surface: #ffffff;
            --text: #1e293b;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-lg: 24px;
            --shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

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

        button,
        input,
        textarea {
            font: inherit;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        .text-muted {
            color: var(--text-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 15px;
            line-height: 1;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            background: transparent;
            color: var(--text);
        }

        .btn-sm {
            padding: 9px 20px;
            font-size: 14px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(30, 58, 138, 0.18);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(30, 58, 138, 0.28);
        }

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

        .btn-light {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 14px rgba(255, 255, 255, 0.2);
        }

        .btn-light:hover {
            background: var(--accent-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

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

        .btn-block {
            width: 100%;
        }

        .btn:focus-visible,
        .nav-link:focus-visible,
        .tag:focus-visible,
        .share-btn:focus-visible {
            outline: 3px solid rgba(245, 158, 11, 0.45);
            outline-offset: 2px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border-radius: 12px;
            font-size: 18px;
            box-shadow: 0 6px 16px rgba(30, 58, 138, 0.25);
        }

        .brand-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
        }

        .brand-text:hover {
            color: var(--primary);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            padding: 10px 18px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            white-space: nowrap;
        }

        .nav-link:hover {
            background: #f1f5f9;
            color: var(--primary);
        }

        .nav-link.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 16px rgba(30, 58, 138, 0.24);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: #f1f5f9;
            color: var(--text);
            font-size: 18px;
            cursor: pointer;
        }

        .nav-toggle:hover {
            background: #e2e8f0;
            color: var(--primary);
        }

        .main-nav.open {
            display: flex;
        }

        .bottom-tab {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 120;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-top: 1px solid var(--border);
            height: 64px;
            padding-bottom: env(safe-area-inset-bottom);
        }

        .tab-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-muted);
        }

        .tab-item i {
            font-size: 19px;
        }

        .tab-item:hover,
        .tab-item.active {
            color: var(--primary);
        }

        .page-hero {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 84px 0 100px;
            color: #fff;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(30, 58, 138, 0.78));
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.72);
            margin-bottom: 16px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.9);
        }

        .breadcrumb a:hover {
            color: var(--accent-light);
        }

        .breadcrumb span {
            color: rgba(255, 255, 255, 0.9);
        }

        .page-hero h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.3;
            max-width: 860px;
            margin-bottom: 14px;
        }

        .page-hero .hero-desc {
            max-width: 760px;
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.92);
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 24px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.86);
        }

        .hero-meta-item {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .article-section {
            position: relative;
            z-index: 3;
            margin-top: -36px;
            padding-bottom: 84px;
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 340px;
            gap: 28px;
            align-items: start;
        }

        .article-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            overflow: hidden;
        }

        .article-cover img {
            width: 100%;
            height: 380px;
            object-fit: cover;
        }

        .article-content {
            padding: 40px 48px;
            color: #334155;
            font-size: 16px;
            line-height: 1.9;
        }

        .article-content h2 {
            font-size: 25px;
            font-weight: 700;
            color: var(--text);
            margin: 28px 0 14px;
            padding-left: 14px;
            border-left: 4px solid var(--accent);
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            margin: 24px 0 12px;
        }

        .article-content p {
            margin: 16px 0;
        }

        .article-content a {
            color: var(--primary-light);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

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

        .article-content blockquote {
            margin: 20px 0;
            padding: 18px 24px;
            background: #f8fafc;
            border-left: 4px solid var(--accent);
            border-radius: 0 12px 12px 0;
            color: var(--text-muted);
            font-style: italic;
        }

        .article-content ul,
        .article-content ol {
            margin: 16px 0;
            padding-left: 22px;
        }

        .article-content ul {
            list-style: disc;
        }

        .article-content ol {
            list-style: decimal;
        }

        .article-content li {
            margin: 8px 0;
        }

        .article-content img {
            border-radius: 12px;
            margin: 20px 0;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--border);
            padding: 10px 14px;
            text-align: left;
        }

        .article-content th {
            background: #f1f5f9;
            font-weight: 600;
        }

        .article-footer {
            padding: 24px 48px;
            border-top: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 16px;
            border-radius: 999px;
            background: #f1f5f9;
            color: #334155;
            font-size: 13px;
            font-weight: 500;
            cursor: default;
            transition: var(--transition);
        }

        .tag:hover {
            background: #e2e8f0;
            color: var(--primary);
        }

        .article-notice {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 14px 18px;
            border-radius: 12px;
            background: #fffbeb;
            color: #92400e;
            font-size: 14px;
            line-height: 1.7;
        }

        .article-notice i {
            margin-top: 3px;
        }

        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 90px;
        }

        .side-card {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 26px;
            box-shadow: var(--shadow);
        }

        .side-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 18px;
            position: relative;
            padding-left: 14px;
        }

        .side-card h3::before {
            content: '';
            position: absolute;
            left: 0;
            top: 4px;
            bottom: 4px;
            width: 4px;
            border-radius: 2px;
            background: var(--accent);
        }

        .side-list {
            display: flex;
            flex-direction: column;
        }

        .side-list li {
            padding: 11px 0;
            border-bottom: 1px dashed var(--border);
        }

        .side-list li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .side-list li:first-child {
            padding-top: 0;
        }

        .side-list a {
            color: var(--text);
            font-size: 14px;
            line-height: 1.5;
            display: block;
        }

        .side-list a:hover {
            color: var(--primary);
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-cloud .tag {
            cursor: pointer;
        }

        .side-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
        }

        .side-cta h3 {
            color: #fff;
            margin-bottom: 10px;
        }

        .side-cta h3::before {
            background: var(--accent-light);
        }

        .side-cta p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 18px;
        }

        .side-cta .btn {
            background: #fff;
            color: var(--primary);
        }

        .side-cta .btn:hover {
            background: var(--accent-light);
            color: var(--primary-dark);
        }

        .related-section {
            padding: 80px 0;
            background: var(--bg);
        }

        .section-head {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 8px;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 16px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            display: block;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .related-card-img {
            overflow: hidden;
            aspect-ratio: 16 / 9;
        }

        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .related-card:hover .related-card-img img {
            transform: scale(1.04);
        }

        .related-card-body {
            padding: 24px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            border-radius: 999px;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
        }

        .related-card-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            color: var(--text);
            margin: 12px 0 8px;
        }

        .related-card-body p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .related-meta {
            font-size: 13px;
            color: var(--text-muted);
        }

        .faq-section {
            padding: 80px 0;
            background: var(--surface);
        }

        .faq-grid {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 22px 26px;
            background: var(--surface);
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

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

        .faq-item summary {
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }

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

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

        .faq-item[open] summary::before {
            content: '\f0fe';
            color: var(--primary);
        }

        .faq-item p {
            margin-top: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            padding-left: 28px;
        }

        .cta-section {
            padding: 40px 0 80px;
            background: var(--bg);
        }

        .cta-card {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            padding: 44px 48px;
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            box-shadow: var(--shadow-lg);
        }

        .cta-card h2 {
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 8px;
        }

        .cta-card p {
            color: rgba(255, 255, 255, 0.9);
            line-height: 1.7;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 60px 0 80px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
        }

        .footer-brand .brand {
            color: #fff;
        }

        .footer-brand .brand-text {
            color: #fff;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            margin-top: 16px;
            max-width: 300px;
        }

        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: #94a3b8;
            font-size: 14px;
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 10px;
            font-size: 14px;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact i {
            color: var(--accent-light);
        }

        .footer-bottom {
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
        }

        .not-found-section {
            padding: 100px 0;
            background: var(--bg);
            min-height: 60vh;
            display: flex;
            align-items: center;
        }

        .not-found-card {
            max-width: 560px;
            margin: 0 auto;
            text-align: center;
            padding: 60px 40px;
            background: var(--surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
        }

        .not-found-icon {
            display: inline-flex;
            width: 76px;
            height: 76px;
            border-radius: 50%;
            background: #fee2e2;
            color: #ef4444;
            align-items: center;
            justify-content: center;
            font-size: 30px;
            margin-bottom: 20px;
        }

        .not-found-card h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
        }

        .not-found-card p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }

            .article-layout {
                grid-template-columns: 1fr;
            }

            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            body {
                padding-bottom: 64px;
            }

            .header-inner {
                height: 60px;
            }

            .main-nav {
                display: none;
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(14px);
                -webkit-backdrop-filter: blur(14px);
                padding: 16px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 16px 40px rgba(15, 23, 42, 0.1);
                gap: 6px;
                z-index: 99;
            }

            .main-nav .nav-link {
                padding: 14px 18px;
                border-radius: 12px;
            }

            .nav-toggle {
                display: inline-flex;
            }

            .header-actions {
                display: none;
            }

            .bottom-tab {
                display: flex;
            }

            .page-hero {
                padding: 60px 0 80px;
            }

            .page-hero h1 {
                font-size: 28px;
            }

            .hero-desc {
                font-size: 15px;
            }

            .hero-meta {
                gap: 14px;
            }

            .article-cover img {
                height: 230px;
            }

            .article-content {
                padding: 24px;
            }

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

            .article-section {
                margin-top: -28px;
                padding-bottom: 60px;
            }

            .related-section,
            .faq-section {
                padding: 60px 0;
            }

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

            .cta-card {
                flex-direction: column;
                text-align: center;
                padding: 36px 24px;
            }

            .cta-actions {
                justify-content: center;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .site-footer {
                padding-bottom: 80px;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }
        }

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

            .brand-text {
                font-size: 18px;
            }

            .brand-icon {
                width: 36px;
                height: 36px;
                font-size: 16px;
            }

            .page-hero h1 {
                font-size: 24px;
            }

            .page-hero .hero-desc {
                font-size: 14px;
            }

            .hero-meta-item {
                font-size: 13px;
            }

            .article-content {
                padding: 20px;
                font-size: 15px;
            }

            .article-content h2 {
                font-size: 21px;
            }

            .article-cover img {
                height: 180px;
            }

            .article-footer {
                padding: 18px 20px;
            }

            .related-card-body {
                padding: 20px;
            }

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

            .faq-item {
                padding: 18px 20px;
            }

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

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

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

            .not-found-card {
                padding: 40px 24px;
            }
        }

        :root {
            scroll-padding-top: 80px;
        }