/* roulang page: index */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #eff6ff;
  --accent: #c7a45a;
  --accent-dark: #b8860b;
  --bg: #f8fafc;
  --bg-alt: #f1f5f9;
  --card-bg: #ffffff;
  --text-main: #1e293b;
  --text-body: #334155;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  --border-light: #eef2f7;
  --success: #16a34a;
  --warning: #d97706;
  --error: #dc2626;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow-sm: 0 2px 8px rgba(15,23,42,0.05);
  --shadow-md: 0 8px 30px rgba(15,23,42,0.08);
  --shadow-lg: 0 12px 32px rgba(15,23,42,0.10);
  --shadow-xl: 0 24px 64px rgba(15,23,42,0.16);
  --container: 1200px;
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Source Han Sans SC', -apple-system, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-main);
  background: var(--bg);
  color: var(--text-body);
  font-size: 16px;
  line-height: 1.75;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .2s ease-out; }
a:hover { color: var(--primary-dark); }
ul, ol { padding-left: 1.2rem; }
button { font-family: var(--font-main); cursor: pointer; border: none; background: none; }
input, textarea { font-family: var(--font-main); }
.container { max-width: var(--container); margin: 0 auto; padding: 0 32px; }
.section { padding: 96px 0; }
.section-header { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-header .sec-tag {
  display: inline-block; background: var(--primary-light); color: var(--primary);
  font-size: 13px; font-weight: 600; letter-spacing: .5px;
  padding: 6px 16px; border-radius: 999px; margin-bottom: 16px;
}
.section-header h2 { font-size: 32px; font-weight: 700; color: var(--text-main); line-height: 1.3; margin-bottom: 14px; }
.section-header p { color: var(--text-muted); font-size: 16px; line-height: 1.8; }

/* ==== Dock Nav ==== */
.site-header { position: sticky; top: 0; z-index: 1000; padding: 12px 20px 0; background: transparent; }
.dock-nav {
  max-width: var(--container); margin: 0 auto; height: 64px;
  background: rgba(255,255,255,0.86); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(226,232,240,0.8); border-radius: 24px;
  box-shadow: var(--shadow-md); display: flex; align-items: center;
  justify-content: space-between; padding: 0 28px;
  position: relative;
}
.brand-logo { display: flex; align-items: baseline; gap: 4px; flex-shrink: 0; }
.brand-main { font-size: 22px; font-weight: 800; color: var(--text-main); letter-spacing: .5px; }
.brand-sub { font-size: 13px; font-weight: 600; color: var(--primary); background: var(--primary-light); padding: 2px 10px; border-radius: 999px; margin-left: 4px; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a {
  font-size: 15px; font-weight: 500; color: #475569; padding: 8px 4px; position: relative; transition: color .2s;
}
.nav-links a::after {
  content: ''; position: absolute; left: 0; bottom: 0; width: 100%; height: 2px;
  background: var(--primary); border-radius: 2px; transform: scaleX(0); transition: transform .25s ease-out;
}
.nav-links a:hover { color: var(--primary); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-links a.active { color: var(--primary); font-weight: 600; }
.nav-links a.active::after { transform: scaleX(1); }
.nav-actions { display: flex; align-items: center; gap: 16px; }
.nav-search { width: 38px; height: 38px; border-radius: 10px; display: flex; align-items: center; justify-content: center; background: var(--bg-alt); color: var(--text-muted); transition: all .2s; }
.nav-search:hover { background: var(--primary-light); color: var(--primary); }
.nav-search svg { width: 18px; height: 18px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 15px; font-weight: 600; border-radius: 10px; height: 44px;
  padding: 0 28px; transition: all .25s ease-out; white-space: nowrap;
}
.btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn-primary { background: var(--primary); color: #fff; border: 1px solid var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(37,99,235,0.25); }
.btn-primary:active { transform: translateY(0) scale(.97); }
.btn-secondary { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn-secondary:hover { background: var(--primary-light); transform: translateY(-1px); }
.btn-secondary:active { transform: scale(.97); }
.btn-white { background: #fff; color: var(--primary); border: 1px solid transparent; }
.btn-white:hover { background: var(--bg-alt); color: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn-sm { height: 38px; padding: 0 20px; font-size: 14px; border-radius: 8px; }
.hamburger { display: none; width: 40px; height: 40px; border-radius: 10px; align-items: center; justify-content: center; background: var(--bg-alt); color: var(--text-main); }
.hamburger svg { width: 20px; height: 20px; }
.mobile-menu {
  display: none; position: absolute; top: calc(100% + 8px); left: 0; right: 0;
  background: #fff; border-radius: 20px; box-shadow: var(--shadow-lg);
  padding: 16px; border: 1px solid var(--border-light); flex-direction: column; gap: 4px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a { padding: 12px 16px; border-radius: 10px; font-size: 15px; font-weight: 500; color: var(--text-body); }
.mobile-menu a:hover, .mobile-menu a.active { background: var(--primary-light); color: var(--primary); }
.mobile-menu .btn { margin-top: 8px; width: 100%; }
.menu-overlay { display: none; }

/* ==== Hero ==== */
.hero {
  position: relative; min-height: 85vh; display: flex; align-items: center;
  background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  margin-top: -76px; padding-top: 76px;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(255,255,255,0.92) 0%, rgba(255,255,255,0.72) 50%, rgba(248,250,252,0.40) 100%);
}
.hero::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 120px;
  background: linear-gradient(to top, var(--bg) 0%, transparent 100%);
}
.hero-content { position: relative; z-index: 2; max-width: 680px; padding: 80px 0; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; background: #fff; border: 1px solid var(--border);
  border-radius: 999px; padding: 6px 16px; font-size: 13px; font-weight: 600; color: var(--text-muted); margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}
.hero-badge::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--success); }
.hero h1 {
  font-size: 46px; font-weight: 800; color: var(--text-main); line-height: 1.25; margin-bottom: 20px; letter-spacing: 0.5px;
}
.hero-sub { font-size: 17px; color: var(--text-body); line-height: 1.8; margin-bottom: 36px; max-width: 560px; }
.hero-cta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-trust {
  display: flex; align-items: center; gap: 24px; color: var(--text-muted); font-size: 14px; flex-wrap: wrap;
}
.hero-trust span { display: inline-flex; align-items: center; gap: 6px; }
.hero-trust svg { width: 16px; height: 16px; color: var(--accent); }

/* ==== Feature Cards ==== */
.features { background: var(--bg); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card {
  background: var(--card-bg); border-radius: var(--radius-lg); padding: 32px 28px;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border-light);
  transition: all .3s ease-out; display: flex; flex-direction: column;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.feature-icon {
  width: 56px; height: 56px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
  background: var(--primary-light); color: var(--primary); margin-bottom: 24px;
}
.feature-icon svg { width: 26px; height: 26px; }
.feature-card h3 { font-size: 20px; font-weight: 700; color: var(--text-main); margin-bottom: 12px; }
.feature-card p { font-size: 15px; color: var(--text-muted); line-height: 1.75; flex: 1; margin-bottom: 20px; }
.feature-link {
  font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 4px;
}
.feature-link svg { width: 15px; height: 15px; transition: transform .2s; }
.feature-link:hover svg { transform: translateX(4px); }

/* ==== Scenarios ==== */
.scenarios { background: var(--card-bg); }
.scenario-block { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; margin-bottom: 80px; }
.scenario-block:last-child { margin-bottom: 0; }
.scenario-block.reverse .scenario-img { order: 2; }
.scenario-block.reverse .scenario-text { order: 1; }
.scenario-img { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.scenario-img img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4/3; }
.scenario-tag {
  display: inline-block; background: var(--primary-light); color: var(--primary); font-size: 13px; font-weight: 600;
  padding: 4px 14px; border-radius: 999px; margin-bottom: 16px;
}
.scenario-text h3 { font-size: 26px; font-weight: 700; color: var(--text-main); line-height: 1.4; margin-bottom: 16px; }
.scenario-text p { font-size: 15px; color: var(--text-muted); line-height: 1.8; margin-bottom: 20px; }
.scenario-list { list-style: none; padding: 0; margin: 0 0 28px; }
.scenario-list li {
  display: flex; align-items: flex-start; gap: 12px; padding: 8px 0;
  font-size: 15px; color: var(--text-body); line-height: 1.7;
}
.scenario-list li::before {
  content: '✓'; flex-shrink: 0; width: 20px; height: 20px; border-radius: 50%;
  background: var(--primary-light); color: var(--primary); font-size: 12px; font-weight: 700;
  display: flex; align-items: center; justify-content: center; margin-top: 3px;
}
.scenario-link { font-size: 15px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.scenario-link svg { width: 16px; height: 16px; transition: transform .2s; }
.scenario-link:hover svg { transform: translateX(4px); }

/* ==== Trust ==== */
.trust { background: var(--bg-alt); }
.trust-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin-bottom: 64px; text-align: center;
}
.trust-num { font-size: 42px; font-weight: 800; color: var(--primary); line-height: 1.1; }
.trust-num span { color: var(--accent); }
.trust-label { font-size: 14px; color: var(--text-muted); margin-top: 8px; }
.trust-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.trust-card {
  background: #fff; border-radius: var(--radius-lg); padding: 32px; box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light); display: flex; flex-direction: column; gap: 16px;
  transition: all .3s ease-out;
}
.trust-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.trust-avatar {
  width: 52px; height: 52px; border-radius: 50%; background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 700;
}
.trust-star { display: flex; gap: 2px; color: var(--accent); }
.trust-star svg { width: 16px; height: 16px; }
.trust-card p { font-size: 14px; color: var(--text-body); line-height: 1.75; flex: 1; }
.trust-name { font-size: 14px; font-weight: 600; color: var(--text-main); }
.trust-role { font-size: 13px; color: var(--text-light); }

/* ==== News ==== */
.news { background: var(--bg); }
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.news-card {
  background: #fff; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light); transition: all .3s ease-out;
}
.news-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.news-card-inner { display: block; color: inherit; }
.news-card-inner:hover { color: inherit; }
.news-thumb { position: relative; aspect-ratio: 16/9; overflow: hidden; background: var(--bg-alt); }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease-out; }
.news-card:hover .news-thumb img { transform: scale(1.03); }
.news-tag {
  position: absolute; top: 14px; left: 14px; background: rgba(255,255,255,0.92); color: var(--primary);
  font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: 999px; backdrop-filter: blur(4px);
  box-shadow: var(--shadow-sm);
}
.news-content { padding: 22px 24px 20px; }
.news-content h3 { font-size: 18px; font-weight: 700; color: var(--text-main); line-height: 1.5; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-content p { font-size: 14px; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-footer { display: flex; align-items: center; justify-content: space-between; }
.news-date { font-size: 13px; color: var(--text-light); display: inline-flex; align-items: center; gap: 6px; }
.news-date svg { width: 14px; height: 14px; }
.news-link { font-size: 14px; font-weight: 600; color: var(--primary); }
.news-empty {
  grid-column: 1 / -1; text-align: center; padding: 60px 20px; background: #fff;
  border-radius: var(--radius-lg); border: 1px dashed var(--border); color: var(--text-light); font-size: 15px;
}
.news-empty svg { width: 48px; height: 48px; margin: 0 auto 16px; color: var(--text-light); display: block; }

/* ==== FAQ ==== */
.faq { background: var(--card-bg); }
.faq-wrap { max-width: 780px; margin: 0 auto; }
.faq-item {
  background: var(--bg); border-radius: var(--radius-md); margin-bottom: 14px; padding: 0;
  border: 1px solid var(--border-light); overflow: hidden; transition: all .3s ease-out;
}
.faq-item:hover { border-color: var(--border); }
.faq-item.open { background: #fff; border-color: var(--primary); box-shadow: var(--shadow-sm); }
.faq-q {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 20px 24px; text-align: left; font-size: 16px; font-weight: 600; color: var(--text-main);
}
.faq-icon { flex-shrink: 0; width: 24px; height: 24px; position: relative; }
.faq-icon::before, .faq-icon::after {
  content: ''; position: absolute; background: var(--primary); border-radius: 2px; transition: all .25s ease-out;
}
.faq-icon::before { width: 14px; height: 2px; top: 11px; left: 5px; }
.faq-icon::after { width: 2px; height: 14px; top: 5px; left: 11px; }
.faq-item.open .faq-icon::after { transform: scaleY(0); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease-out; }
.faq-a-inner { padding: 0 24px 22px; font-size: 15px; color: var(--text-muted); line-height: 1.8; }

/* ==== CTA ==== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, #1e5fa3 100%); position: relative; overflow: hidden;
}
.cta-section::before {
  content: ''; position: absolute; top: -60px; right: -40px; width: 300px; height: 300px;
  border-radius: 50%; background: rgba(255,255,255,0.08);
}
.cta-section::after {
  content: ''; position: absolute; bottom: -80px; left: -20px; width: 260px; height: 260px;
  border-radius: 50%; background: rgba(255,255,255,0.05);
}
.cta-content { position: relative; z-index: 2; text-align: center; max-width: 680px; margin: 0 auto; }
.cta-content h2 { font-size: 34px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.cta-content p { font-size: 16px; color: rgba(255,255,255,0.85); margin-bottom: 32px; line-height: 1.8; }
.cta-content .btn-white { box-shadow: 0 8px 24px rgba(0,0,0,0.15); }

/* ==== Footer ==== */
.site-footer { background: #0f172a; color: #94a3b8; padding: 72px 0 96px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 48px; }
.footer-brand .brand-logo { margin-bottom: 18px; }
.footer-brand .brand-main { color: #f1f5f9; }
.footer-brand .brand-sub { background: rgba(255,255,255,0.12); color: #cbd5e1; }
.footer-desc { font-size: 14px; line-height: 1.8; margin-bottom: 20px; color: #7c8ba1; }
.footer-col h4 { font-size: 16px; font-weight: 600; color: #f1f5f9; margin-bottom: 20px; }
.footer-col ul { list-style: none; padding: 0; }
.footer-col ul li { margin-bottom: 12px; font-size: 14px; }
.footer-col ul a { color: #94a3b8; transition: all .2s; }
.footer-col ul a:hover { color: #fff; padding-left: 4px; }
.footer-contact li { display: flex; align-items: center; gap: 10px; }
.footer-contact svg { width: 16px; height: 16px; flex-shrink: 0; color: #475569; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); margin-top: 56px; padding-top: 28px; text-align: center; font-size: 13px; color: #64748b; }

/* ==== Bottom Float Bar ==== */
.float-bar {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 1200;
  background: var(--primary); box-shadow: 0 -4px 24px rgba(15,23,42,0.12);
  display: flex; align-items: center; justify-content: center; gap: 32px;
  padding: 0 32px; height: 64px; opacity: 0; transform: translateY(100%);
  transition: all .4s ease-out;
}
.float-bar.visible { opacity: 1; transform: translateY(0); }
.float-bar-text { color: #fff; font-size: 15px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.float-bar-close {
  position: absolute; right: 16px; top: 50%; transform: translateY(-50%);
  width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.7); font-size: 18px; transition: all .2s;
}
.float-bar-close:hover { background: rgba(255,255,255,0.15); color: #fff; }
body { padding-bottom: 0; }
body.has-float-bar::after { content: ''; display: block; height: 64px; }

/* ==== Responsive ==== */
@media (max-width: 1023px) {
  .nav-links { gap: 18px; }
  .nav-links a { font-size: 14px; }
  .dock-nav { padding: 0 20px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .trust-stats { gap: 24px; }
  .trust-list { grid-template-columns: repeat(2, 1fr); }
  .scenario-block { gap: 40px; }
  .hero h1 { font-size: 38px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}
@media (max-width: 767px) {
  .container { padding: 0 20px; }
  .section { padding: 64px 0; }
  .section-header { margin-bottom: 40px; }
  .section-header h2 { font-size: 26px; }
  .site-header { padding: 8px 12px 0; }
  .dock-nav { height: 56px; border-radius: 18px; padding: 0 14px; }
  .brand-main { font-size: 18px; }
  .brand-sub { font-size: 11px; padding: 2px 8px; }
  .nav-links, .nav-actions .nav-search { display: none; }
  .hamburger { display: flex; }
  .nav-actions { gap: 8px; }
  .hero { min-height: 70vh; margin-top: -64px; padding-top: 64px; }
  .hero h1 { font-size: 30px; line-height: 1.35; }
  .hero-sub { font-size: 15px; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { width: 100%; }
  .hero-trust { flex-direction: column; align-items: flex-start; gap: 10px; font-size: 13px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { padding: 28px 24px; }
  .scenario-block { grid-template-columns: 1fr; gap: 32px; margin-bottom: 56px; }
  .scenario-block.reverse .scenario-img { order: 0; }
  .scenario-block.reverse .scenario-text { order: 0; }
  .scenario-text h3 { font-size: 22px; }
  .trust-stats { grid-template-columns: 1fr; gap: 28px; }
  .trust-list { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .faq-q { font-size: 15px; padding: 18px 20px; }
  .faq-a-inner { padding: 0 20px 18px; }
  .cta-content h2 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .site-footer { padding: 56px 0 80px; }
  .float-bar { height: auto; min-height: 56px; padding: 12px 48px 12px 16px; gap: 12px; justify-content: flex-start; }
  .float-bar-text { font-size: 13px; }
  .float-bar .btn { height: 36px; padding: 0 16px; font-size: 13px; }
}
@media (max-width: 520px) {
  .section-header h2 { font-size: 24px; }
  .btn { padding: 0 20px; }
}

/* roulang page: category1 */
/* ===== Design tokens ===== */
:root {
  --primary: #1E5FA3;
  --primary-light: #EAF1F9;
  --primary-lighter: #F4F8FC;
  --primary-dark: #143D75;
  --accent: #C7A45A;
  --accent-light: #F5EFE2;
  --bg: #F8FAFC;
  --card-bg: #FFFFFF;
  --text-main: #1E293B;
  --text-body: #334155;
  --text-sub: #64748B;
  --text-faint: #94A3B8;
  --border: #E2E8F0;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(15,23,42,0.05);
  --shadow-md: 0 12px 32px rgba(15,23,42,0.10);
  --shadow-dock: 0 8px 30px rgba(15,23,42,0.08);
  --shadow-bar: 0 -4px 24px rgba(15,23,42,0.08);
  --container-w: 1200px;
  --space-section: 96px;
  --space-section-m: 60px;
  --transition: 0.25s ease-out;
}

/* ===== Reset & base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "Inter", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: var(--primary-dark);
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 32px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(30,95,163,0.25);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(30,95,163,0.32);
}

.btn-primary:active {
  transform: scale(0.97);
}

.btn-primary:focus-visible {
  outline: 3px solid rgba(30,95,163,0.4);
  outline-offset: 2px;
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

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

.btn-outline:focus-visible {
  outline: 3px solid rgba(30,95,163,0.3);
  outline-offset: 2px;
}

.btn-light {
  background: #ffffff;
  color: var(--primary);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

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

.btn-sm {
  height: 38px;
  padding: 0 20px;
  font-size: 14px;
  border-radius: 8px;
}

/* ===== Header / Dock nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 14px 16px 0;
}

.dock-nav {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
  padding: 0 24px;
  background: rgba(255,255,255,0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(226,232,240,0.85);
  border-radius: 22px;
  box-shadow: var(--shadow-dock);
}

.brand-logo {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-main);
}

.brand-main {
  font-size: 20px;
  letter-spacing: 0.5px;
  color: var(--primary);
}

.brand-sub {
  font-size: 13px;
  color: var(--text-sub);
  letter-spacing: 2px;
  font-weight: 500;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 14.5px;
  font-weight: 500;
  color: #475569;
  padding: 6px 2px;
  position: relative;
  transition: color var(--transition);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  opacity: 0;
  transform: scaleX(0.4);
  transition: all var(--transition);
}

.nav-links a:hover {
  color: var(--primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  opacity: 1;
  transform: scaleX(1);
}

.nav-links a.active {
  color: var(--primary);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-search {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  color: var(--text-sub);
  transition: all var(--transition);
}

.nav-search svg {
  width: 18px;
  height: 18px;
}

.nav-search:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.hamburger {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
}

.hamburger svg {
  width: 20px;
  height: 20px;
}

.hamburger:hover {
  background: var(--primary-light);
}

.mobile-menu {
  display: none;
  position: absolute;
  top: 76px;
  left: 16px;
  right: 16px;
  background: #fff;
  border-radius: 18px;
  padding: 16px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  flex-direction: column;
  gap: 6px;
  z-index: 101;
}

.mobile-menu a {
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 15px;
  color: var(--text-body);
  font-weight: 500;
}

.mobile-menu a:hover,
.mobile-menu a.active {
  background: var(--primary-light);
  color: var(--primary);
}

.mobile-menu .btn {
  margin-top: 8px;
  width: 100%;
}

.mobile-menu.open {
  display: flex;
}

.menu-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.4);
  z-index: 99;
}

.menu-overlay.show {
  display: block;
}

/* ===== Page hero ===== */
.page-hero {
  position: relative;
  padding: 88px 0 72px;
  background: linear-gradient(135deg, rgba(30,95,163,0.08) 0%, rgba(248,250,252,0.6) 50%, rgba(199,164,90,0.08) 100%),
              url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom: 1px solid var(--border);
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(255,255,255,0.92) 0%, rgba(255,255,255,0.6) 40%, rgba(255,255,255,0.3) 100%);
  backdrop-filter: blur(2px);
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--text-sub);
}

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

.breadcrumb .sep {
  color: var(--text-faint);
}

.breadcrumb .current {
  color: var(--primary);
  font-weight: 500;
}

.page-hero h1 {
  font-size: 44px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.page-hero p {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-sub);
  max-width: 720px;
}

/* ===== Section common ===== */
.section-block {
  padding: var(--space-section) 0;
}

.section-block .section-header {
  margin-bottom: 48px;
  max-width: 680px;
}

.section-block .section-header.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-block h2 {
  font-size: 34px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
  letter-spacing: -0.3px;
  margin-bottom: 12px;
}

.section-block h2 .accent-dot {
  color: var(--accent);
}

.section-block .section-lead {
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.7;
}

/* ===== Intro split ===== */
.intro-section {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
}

.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.split-text .tag-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-light);
  color: #8B6D3A;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 30px;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

.split-text h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 16px;
}

.split-text p {
  color: var(--text-sub);
  line-height: 1.85;
  margin-bottom: 14px;
}

.split-text .feature-list {
  margin-top: 20px;
}

.split-text .feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  color: var(--text-body);
  font-size: 15px;
}

.split-text .feature-list li svg {
  width: 18px;
  height: 18px;
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 4px;
}

.split-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  position: relative;
}

.split-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4/3;
}

.split-image .img-caption {
  position: absolute;
  left: 16px;
  bottom: 16px;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(6px);
  padding: 8px 16px;
  border-radius: 10px;
  font-size: 13px;
  color: var(--text-sub);
  box-shadow: var(--shadow-sm);
}

/* ===== Service cards ===== */
.service-section {
  background: var(--bg);
}

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

.service-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background: var(--accent);
  transition: height var(--transition);
}

.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: rgba(30,95,163,0.2);
}

.service-card:hover::before {
  height: 100%;
}

.service-card .card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--primary);
}

.service-card .card-icon svg {
  width: 24px;
  height: 24px;
}

.service-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 10px;
  line-height: 1.4;
}

.service-card p {
  font-size: 14.5px;
  color: var(--text-sub);
  line-height: 1.75;
  margin-bottom: 18px;
}

.service-card .card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.service-card .card-link:hover {
  gap: 8px;
  color: var(--primary-dark);
}

.service-card .card-link svg {
  width: 14px;
  height: 14px;
}

/* ===== Process steps ===== */
.process-section {
  background: linear-gradient(180deg, var(--bg) 0%, var(--primary-lighter) 100%);
  border-top: 1px solid var(--border);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  counter-reset: step;
}

.step-item {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
}

.step-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.step-item .step-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  font-weight: 700;
  margin: 0 auto 18px;
  box-shadow: 0 4px 12px rgba(30,95,163,0.3);
}

.step-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}

.step-item p {
  font-size: 13.5px;
  color: var(--text-sub);
  line-height: 1.65;
}

.step-arrow {
  display: none;
}

/* ===== Case list ===== */
.case-section {
  background: var(--card-bg);
  border-top: 1px solid var(--border);
}

.case-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.case-item {
  display: flex;
  align-items: center;
  gap: 28px;
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 20px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.case-item:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(30,95,163,0.2);
  transform: translateX(4px);
}

.case-thumb {
  width: 200px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.case-thumb img {
  width: 100%;
  height: 132px;
  object-fit: cover;
}

.case-info {
  flex: 1;
}

.case-info .case-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 20px;
  margin-bottom: 10px;
}

.case-info h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
  line-height: 1.5;
}

.case-info p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.case-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-faint);
}

.case-meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.case-meta svg {
  width: 14px;
  height: 14px;
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg);
  border-top: 1px solid var(--border);
}

.faq-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.4fr;
  gap: 56px;
  align-items: start;
}

.faq-intro h2 {
  font-size: 34px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 16px;
}

.faq-intro p {
  color: var(--text-sub);
  line-height: 1.8;
  font-size: 15px;
  margin-bottom: 24px;
}

.faq-intro .faq-contact {
  background: var(--accent-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 1px solid rgba(199,164,90,0.3);
}

.faq-intro .faq-contact h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}

.faq-intro .faq-contact p {
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 12px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item.open {
  border-color: rgba(30,95,163,0.3);
  box-shadow: var(--shadow-md);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  text-align: left;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--text-main);
  transition: background var(--transition);
}

.faq-question:hover {
  background: var(--primary-lighter);
}

.faq-question .faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.faq-question .faq-icon svg {
  width: 14px;
  height: 14px;
}

.faq-item.open .faq-question .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
}

.faq-item.open .faq-answer {
  max-height: 400px;
}

.faq-answer p {
  padding: 0 24px 20px;
  font-size: 14px;
  line-height: 1.8;
  color: #475569;
  border-top: 1px solid var(--border);
  padding-top: 16px;
  margin: 0 24px 0;
  padding-left: 0;
  padding-right: 0;
}

/* ===== CTA banner ===== */
.cta-banner {
  position: relative;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, #2B6CB0 100%);
  padding: 72px 0;
  border-radius: 0;
}

.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.12;
}

.cta-banner .container {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.cta-content h2 {
  color: #fff;
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.35;
}

.cta-content p {
  color: rgba(255,255,255,0.85);
  font-size: 15px;
  line-height: 1.7;
  max-width: 520px;
}

.cta-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

/* ===== Footer ===== */
.site-footer {
  background: #0F172A;
  padding: 64px 0 0;
  color: #94A3B8;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .brand-logo {
  margin-bottom: 14px;
}

.footer-brand .brand-main {
  color: #fff;
  font-size: 22px;
}

.footer-brand .brand-sub {
  color: #94A3B8;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: #94A3B8;
  margin-top: 12px;
  max-width: 320px;
}

.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 18px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: #94A3B8;
  font-size: 14px;
  transition: all var(--transition);
}

.footer-col ul li a:hover {
  color: #fff;
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
}

.footer-contact li svg {
  width: 16px;
  height: 16px;
  color: var(--accent);
  flex-shrink: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(148,163,184,0.15);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: #64748B;
}

/* ===== Bottom bar ===== */
.bottom-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background: var(--primary);
  box-shadow: var(--shadow-bar);
  transform: translateY(100%);
  transition: transform 0.35s ease-out;
}

.bottom-bar.visible {
  transform: translateY(0);
}

.bottom-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 64px;
  padding-top: 0;
  padding-bottom: 0;
}

.bottom-bar-text {
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
}

.bottom-bar-text span {
  font-weight: 700;
}

.bottom-bar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.bottom-bar-close {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.bottom-bar-close svg {
  width: 14px;
  height: 14px;
}

.bottom-bar-close:hover {
  background: rgba(255,255,255,0.3);
}

body {
  padding-bottom: 0;
}

/* ===== Responsive ===== */
@media (min-width: 768px) and (max-width: 1023px) {
  .nav-links {
    gap: 16px;
  }
  
  .nav-links a {
    font-size: 13.5px;
  }
  
  .split-layout {
    gap: 40px;
  }
  
  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  
  .faq-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
  
  .case-item {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .case-thumb {
    width: 100%;
  }
  
  .case-thumb img {
    height: 180px;
  }
}

@media (max-width: 767px) {
  .container {
    padding: 0 20px;
  }
  
  .nav-links {
    display: none;
  }
  
  .nav-search {
    display: none;
  }
  
  .hamburger {
    display: flex;
  }
  
  .dock-nav {
    padding: 0 16px;
    height: 58px;
    border-radius: 18px;
  }
  
  .page-hero {
    padding: 64px 0 48px;
  }
  
  .page-hero h1 {
    font-size: 30px;
  }
  
  .page-hero p {
    font-size: 15px;
  }
  
  .section-block {
    padding: var(--space-section-m) 0;
  }
  
  .section-block h2 {
    font-size: 26px;
  }
  
  .split-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .split-image img {
    aspect-ratio: 16/10;
  }
  
  .service-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .step-item {
    display: flex;
    align-items: center;
    text-align: left;
    padding: 20px;
    gap: 16px;
  }
  
  .step-item .step-num {
    margin: 0;
    flex-shrink: 0;
  }
  
  .case-list {
    gap: 16px;
  }
  
  .case-item {
    flex-direction: column;
    gap: 16px;
    padding: 16px;
  }
  
  .case-thumb {
    width: 100%;
  }
  
  .case-thumb img {
    height: 170px;
  }
  
  .faq-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .faq-question {
    padding: 16px 18px;
    font-size: 14.5px;
  }
  
  .cta-banner {
    padding: 48px 0;
  }
  
  .cta-banner .container {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .cta-content h2 {
    font-size: 24px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .bottom-bar .container {
    height: auto;
    padding: 12px 20px;
    flex-direction: column;
    gap: 8px;
  }
  
  .bottom-bar-text {
    font-size: 14px;
  }
}

@media (min-width: 1024px) and (max-width: 1280px) {
  .container {
    padding: 0 32px;
  }
}

/* ===== Focus visibility ===== */
a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(30,95,163,0.4);
  outline-offset: 2px;
  border-radius: 4px;
}

/* roulang page: article */
:root {
            --primary: #2563EB;
            --primary-dark: #1E40AF;
            --primary-light: #EFF6FF;
            --accent: #C7A45A;
            --accent-light: #FDF6EC;
            --bg: #F8FAFC;
            --card: #FFFFFF;
            --text: #1E293B;
            --text-body: #334155;
            --text-muted: #64748B;
            --text-faint: #94A3B8;
            --border: #E2E8F0;
            --radius-xl: 24px;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
            --shadow-md: 0 8px 30px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);
            --font-main: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Source Han Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --transition: 0.25s ease-out;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            background: var(--bg);
            color: var(--text-body);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style-position: inside;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), color var(--transition), opacity var(--transition);
            white-space: nowrap;
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.18);
        }

        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .btn:active {
            transform: translateY(0) scale(0.98);
            opacity: 0.9;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.22);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
        }

        .btn-light {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
        }

        .btn-light:hover {
            background: var(--primary-light);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
        }

        .btn-sm {
            height: 38px;
            padding: 0 20px;
            font-size: 14px;
            border-radius: 9px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 14px 20px 0;
        }

        .dock-nav {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 62px;
            padding: 0 22px;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid rgba(226, 232, 240, 0.8);
            border-radius: 22px;
            box-shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
            position: relative;
        }

        .brand-logo {
            display: flex;
            align-items: baseline;
            gap: 6px;
            font-weight: 700;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .brand-main {
            font-size: 22px;
            color: var(--primary);
        }

        .brand-sub {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
            border-left: 1px solid var(--border);
            padding-left: 8px;
        }

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

        .nav-links a {
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: 10px;
            transition: color var(--transition), background var(--transition);
        }

        .nav-links a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-light);
            position: relative;
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--primary);
        }

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

        .nav-search {
            width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            color: var(--text-muted);
            transition: background var(--transition), color var(--transition);
        }

        .nav-search:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .nav-search svg {
            width: 20px;
            height: 20px;
        }

        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            color: var(--text-muted);
            transition: background var(--transition), color var(--transition);
        }

        .hamburger:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .hamburger svg {
            width: 22px;
            height: 22px;
        }

        .mobile-menu {
            display: none;
            position: absolute;
            top: calc(100% + 8px);
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(14px);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            padding: 12px;
            z-index: 110;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu a {
            padding: 12px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: 10px;
            transition: background var(--transition), color var(--transition);
        }

        .mobile-menu a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .mobile-menu a.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-light);
        }

        .mobile-menu .btn {
            margin-top: 8px;
        }

        .menu-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.4);
            z-index: 90;
            opacity: 0;
            transition: opacity var(--transition);
        }

        .menu-overlay.open {
            display: block;
            opacity: 1;
        }

        .article-banner {
            position: relative;
            padding: 32px 0 48px;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.06) 0%, rgba(255, 255, 255, 0.92) 55%, rgba(255, 255, 255, 1) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            border-bottom: 1px solid var(--border);
        }

        .article-banner .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
        }

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

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

        .breadcrumb .sep {
            color: var(--text-faint);
            font-size: 14px;
        }

        .breadcrumb .current {
            color: var(--text);
            font-weight: 500;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 320px;
        }

        .article-section {
            padding: 48px 0 72px;
        }

        .article-card {
            background: var(--card);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            padding: 48px 56px;
            margin: 0 auto;
            max-width: 900px;
        }

        .article-header {
            padding-bottom: 28px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 32px;
        }

        .article-category {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .article-header h1 {
            font-size: 36px;
            line-height: 1.28;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 18px;
            letter-spacing: -0.5px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 18px;
        }

        .meta-divider {
            color: var(--border);
        }

        .article-summary {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-muted);
            background: var(--bg);
            border-left: 3px solid var(--primary);
            padding: 14px 18px;
            border-radius: 0 12px 12px 0;
        }

        .article-content {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text-body);
            word-break: break-word;
        }

        .article-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            margin-top: 48px;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary-light);
        }

        .article-content h3 {
            font-size: 21px;
            font-weight: 600;
            color: var(--text);
            margin-top: 36px;
            margin-bottom: 12px;
        }

        .article-content p {
            margin-bottom: 20px;
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-color: rgba(37, 99, 235, 0.3);
            transition: color var(--transition), text-decoration-color var(--transition);
        }

        .article-content a:hover {
            color: var(--primary-dark);
            text-decoration-color: var(--primary-dark);
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 20px 6px;
            padding-left: 22px;
        }

        .article-content li {
            margin-bottom: 8px;
            line-height: 1.8;
        }

        .article-content ul li::marker {
            color: var(--primary);
        }

        .article-content ol li::marker {
            color: var(--primary);
            font-weight: 600;
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 22px;
            border-radius: 0 12px 12px 0;
            margin: 28px 0;
            color: var(--text-body);
            font-size: 16px;
            line-height: 1.8;
        }

        .article-content blockquote p:last-child {
            margin-bottom: 0;
        }

        .article-content img {
            width: 100%;
            border-radius: 12px;
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }

        .article-content figure {
            margin: 28px 0;
        }

        .article-content figure img {
            margin: 0 0 10px;
        }

        .article-content figcaption {
            text-align: center;
            font-size: 14px;
            color: var(--text-faint);
            line-height: 1.5;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 28px 0;
            font-size: 15px;
            line-height: 1.7;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--border);
            padding: 12px 16px;
            text-align: left;
            background: #fff;
        }

        .article-content th {
            background: var(--bg);
            font-weight: 600;
            color: var(--text);
        }

        .article-content tr:nth-child(even) td {
            background: #FAFBFC;
        }

        .article-footer {
            margin-top: 44px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 24px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 999px;
            font-size: 13px;
            color: var(--text-muted);
            transition: background var(--transition), color var(--transition), border-color var(--transition);
        }

        .tag:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: rgba(37, 99, 235, 0.2);
        }

        .article-pager {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }

        .pager-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: #fff;
            transition: color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        .pager-link:hover {
            color: var(--primary);
            background: var(--primary-light);
            border-color: rgba(37, 99, 235, 0.3);
            box-shadow: var(--shadow-sm);
        }

        .pager-link .arrow {
            font-size: 18px;
            line-height: 1;
        }

        .article-empty {
            text-align: center;
            background: var(--card);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            padding: 90px 40px;
            max-width: 700px;
            margin: 0 auto;
        }

        .empty-icon {
            width: 72px;
            height: 72px;
            margin: 0 auto 24px;
            background: var(--bg);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-faint);
        }

        .empty-icon svg {
            width: 32px;
            height: 32px;
        }

        .article-empty h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }

        .article-empty p {
            color: var(--text-muted);
            font-size: 16px;
            margin-bottom: 28px;
        }

        .related-section {
            padding: 72px 0 80px;
            background: var(--bg);
            border-top: 1px solid var(--border);
        }

        .section-head {
            text-align: center;
            margin-bottom: 44px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.3px;
            margin-bottom: 8px;
        }

        .section-head p {
            font-size: 15px;
            color: var(--text-muted);
        }

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

        .related-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: transform var(--transition), box-shadow var(--transition);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .related-cover {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg);
            position: relative;
        }

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

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

        .related-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .related-body h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.45;
            color: var(--text);
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition);
        }

        .related-card:hover .related-body h3 {
            color: var(--primary);
        }

        .related-body p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-muted);
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .related-meta {
            font-size: 13px;
            color: var(--text-faint);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .related-meta::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            flex-shrink: 0;
        }

        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding: 64px 0 0;
            font-size: 15px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .footer-brand .brand-logo {
            margin-bottom: 16px;
        }

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

        .footer-brand .brand-sub {
            color: #94A3B8;
            border-left-color: rgba(255, 255, 255, 0.2);
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: #94A3B8;
            margin-top: 14px;
            max-width: 300px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-col a {
            color: #94A3B8;
            font-size: 14px;
            transition: color var(--transition), padding-left var(--transition);
        }

        .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: #94A3B8;
        }

        .footer-contact svg {
            width: 16px;
            height: 16px;
            flex-shrink: 0;
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: #64748B;
        }

        .fixed-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 95;
            background: var(--primary);
            box-shadow: 0 -4px 24px rgba(15, 23, 42, 0.15);
            transform: translateY(100%);
            opacity: 0;
            transition: transform 0.35s ease, opacity 0.35s ease;
        }

        .fixed-cta.visible {
            transform: translateY(0);
            opacity: 1;
        }

        .fixed-cta.hidden {
            transform: translateY(100%);
            opacity: 0;
        }

        .cta-inner {
            max-width: 1200px;
            margin: 0 auto;
            height: 64px;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .cta-text {
            color: #fff;
            font-size: 16px;
            font-weight: 500;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

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

        .cta-actions .btn-light {
            background: #fff;
            color: var(--primary);
            height: 40px;
            padding: 0 22px;
            font-size: 14px;
            border-radius: 10px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }

        .cta-actions .btn-light:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
        }

        .cta-close {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.85);
            background: rgba(255, 255, 255, 0.12);
            font-size: 18px;
            line-height: 1;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }

        .cta-close:hover {
            background: rgba(255, 255, 255, 0.25);
            color: #fff;
            transform: rotate(90deg);
        }

        body.has-fixed-cta {
            padding-bottom: 0;
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }

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

            .article-card {
                padding: 40px 36px;
            }

            .nav-links a {
                padding: 8px 12px;
                font-size: 14px;
            }

            .article-header h1 {
                font-size: 32px;
            }
        }

        @media (max-width: 767px) {
            .site-header {
                padding: 10px 14px 0;
            }

            .dock-nav {
                height: 56px;
                padding: 0 14px;
                border-radius: 18px;
            }

            .brand-main {
                font-size: 19px;
            }

            .brand-sub {
                display: none;
            }

            .nav-links {
                display: none;
            }

            .nav-actions {
                gap: 6px;
            }

            .nav-search {
                display: none;
            }

            .nav-actions .btn-sm {
                display: inline-flex;
                height: 36px;
                padding: 0 16px;
                font-size: 13px;
            }

            .hamburger {
                display: inline-flex;
            }

            .article-banner {
                padding: 24px 0 36px;
            }

            .breadcrumb .sep.hide-mobile {
                display: none;
            }

            .breadcrumb .current {
                max-width: 180px;
            }

            .article-section {
                padding: 32px 0 56px;
            }

            .article-card {
                padding: 28px 20px;
                border-radius: 18px;
            }

            .article-header h1 {
                font-size: 26px;
                line-height: 1.35;
            }

            .article-meta {
                font-size: 13px;
                gap: 6px;
            }

            .article-summary {
                font-size: 15px;
                padding: 12px 14px;
            }

            .article-content {
                font-size: 16px;
                line-height: 1.85;
            }

            .article-content h2 {
                font-size: 22px;
                margin-top: 36px;
            }

            .article-content h3 {
                font-size: 18px;
                margin-top: 28px;
            }

            .article-content blockquote {
                padding: 14px 16px;
            }

            .article-content table {
                font-size: 14px;
                overflow-x: auto;
                display: block;
                white-space: nowrap;
            }

            .article-pager {
                flex-direction: column;
            }

            .pager-link {
                width: 100%;
                justify-content: center;
            }

            .article-empty {
                padding: 60px 24px;
            }

            .article-empty h2 {
                font-size: 24px;
            }

            .related-section {
                padding: 48px 0 56px;
            }

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

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

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

            .footer-brand .footer-desc {
                max-width: 100%;
            }

            .cta-inner {
                height: 56px;
                padding: 0 16px;
            }

            .cta-text {
                font-size: 14px;
            }

            .cta-actions .btn-light {
                height: 36px;
                padding: 0 16px;
                font-size: 13px;
            }

            .cta-close {
                width: 28px;
                height: 28px;
            }
        }

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

            .article-meta {
                flex-wrap: wrap;
                line-height: 1.6;
            }

            .meta-divider {
                display: none;
            }

            .related-body {
                padding: 18px;
            }

            .related-body h3 {
                font-size: 16px;
                -webkit-line-clamp: 2;
            }
        }

/* roulang page: category2 */
:root{
  --primary:#1E5FA3;
  --primary-light:#EAF1F9;
  --primary-dark:#143D75;
  --accent:#C7A45A;
  --accent-light:#F5EFE0;
  --bg:#F8FAFC;
  --card-bg:#FFFFFF;
  --text-main:#1E293B;
  --text-body:#334155;
  --text-secondary:#64748B;
  --text-muted:#94A3B8;
  --border:#E2E8F0;
  --success:#16A34A;
  --warning:#D97706;
  --danger:#DC2626;
  --radius-xl:24px;
  --radius-lg:18px;
  --radius-md:14px;
  --radius-sm:10px;
  --shadow-card:0 2px 8px rgba(15,23,42,.05);
  --shadow-hover:0 12px 32px rgba(15,23,42,.10);
  --shadow-dock:0 8px 30px rgba(15,23,42,.08);
  --shadow-banner:0 24px 64px rgba(15,23,42,.16);
  --shadow-sticky:0 -4px 24px rgba(15,23,42,.08);
  --max-width:1200px;
  --space-section:96px;
  --transition:.25s ease-out;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC','Source Han Sans SC',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  background:var(--bg);
  color:var(--text-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
main{flex:1}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--primary-dark)}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul,ol{list-style:none}
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 32px}
.section{padding:var(--space-section) 0}
.section-head{margin-bottom:48px;max-width:680px}
.section-tag{display:inline-block;font-size:13px;font-weight:600;color:var(--primary);background:var(--primary-light);padding:4px 14px;border-radius:20px;margin-bottom:14px;letter-spacing:.5px}
.section-title{font-size:32px;font-weight:700;color:var(--text-main);line-height:1.3;margin-bottom:16px}
.section-desc{color:var(--text-secondary);font-size:16px;line-height:1.8}
.section-foot{margin-top:36px}

/* header dock */
.site-header{position:sticky;top:12px;z-index:100;padding:0 16px}
.dock-nav{
  position:relative;
  max-width:1200px;
  margin:0 auto;
  height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 24px;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(226,232,240,.9);
  border-radius:22px;
  box-shadow:var(--shadow-dock);
}
.brand-logo{display:flex;align-items:baseline;gap:6px;flex-shrink:0}
.brand-main{font-size:22px;font-weight:800;color:var(--primary-dark);letter-spacing:.5px}
.brand-sub{font-size:14px;font-weight:600;color:var(--accent);letter-spacing:1px}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:40px}
.nav-links a{position:relative;font-size:15px;font-weight:500;color:var(--text-secondary);padding:6px 2px;white-space:nowrap}
.nav-links a:hover{color:var(--primary)}
.nav-links a.active{color:var(--primary);font-weight:600}
.nav-links a.active::after{content:'';position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--primary);border-radius:2px}
.nav-links a[data-slug]{white-space:nowrap}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.nav-search{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;color:var(--text-secondary);transition:all var(--transition)}
.nav-search:hover{background:var(--primary-light);color:var(--primary)}
.nav-search svg{width:19px;height:19px}
.hamburger{display:none;flex-direction:column;justify-content:center;align-items:center;width:38px;height:38px;border-radius:10px;color:var(--text-secondary);transition:all var(--transition)}
.hamburger:hover{background:var(--primary-light)}
.hamburger svg{width:22px;height:22px}
.mobile-menu{
  display:none;
  position:absolute;
  top:calc(100% + 8px);
  left:0;
  right:0;
  background:#fff;
  border-radius:18px;
  box-shadow:var(--shadow-hover);
  padding:16px;
  flex-direction:column;
  gap:6px;
  border:1px solid var(--border);
}
.mobile-menu.open{display:flex}
.mobile-menu a{padding:12px 16px;border-radius:10px;color:var(--text-body);font-size:15px;font-weight:500}
.mobile-menu a:hover{background:var(--primary-light);color:var(--primary)}
.mobile-menu a.active{background:var(--primary-light);color:var(--primary);font-weight:600}
.mobile-menu .btn{margin-top:8px;text-align:center}
.menu-overlay{display:none;position:fixed;inset:0;background:rgba(15,23,42,.35);z-index:-1;opacity:0;transition:opacity var(--transition)}
.menu-overlay.show{display:block;opacity:1}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 28px;border-radius:10px;font-size:15px;font-weight:600;line-height:1;transition:all var(--transition);white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 8px 24px rgba(30,95,163,.25)}
.btn-primary:active{transform:scale(.98)}
.btn-outline{background:transparent;border:1px solid var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary-light);color:var(--primary-dark)}
.btn-white{background:#fff;color:var(--primary)}
.btn-white:hover{background:var(--primary-light);color:var(--primary-dark);transform:translateY(-1px);box-shadow:0 8px 24px rgba(0,0,0,.15)}
.btn-sm{height:38px;padding:0 20px;font-size:14px}
.btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

/* page hero for category */
.page-hero{position:relative;padding:80px 0 96px;background:linear-gradient(135deg,rgba(234,241,249,.92),rgba(255,255,255,.96)),url('/assets/images/backpic/back-3.webp') center/cover no-repeat;border-bottom:1px solid var(--border)}
.page-hero-inner{position:relative;max-width:1000px;margin:0 auto;text-align:center}
.breadcrumb{display:flex;align-items:center;justify-content:center;gap:8px;font-size:14px;color:var(--text-secondary);margin-bottom:28px;flex-wrap:wrap}
.breadcrumb a{color:var(--text-secondary)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--text-muted)}
.breadcrumb .current{color:var(--primary);font-weight:500}
.page-hero h1{font-size:44px;font-weight:700;color:var(--text-main);line-height:1.2;margin-bottom:20px;letter-spacing:-.5px}
.page-hero .hero-desc{max-width:720px;margin:0 auto 32px;font-size:17px;color:var(--text-secondary);line-height:1.9}
.page-hero .hero-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.hero-badge{display:inline-block;font-size:13px;font-weight:600;color:var(--primary);background:rgba(255,255,255,.8);border:1px solid rgba(30,95,163,.2);padding:5px 16px;border-radius:20px;margin-bottom:20px;letter-spacing:.5px}

/* timeline */
.timeline-section{background:var(--card-bg);border-bottom:1px solid var(--border)}
.timeline{position:relative;max-width:860px;margin:0 auto;padding-left:48px}
.timeline::before{content:'';position:absolute;left:16px;top:8px;bottom:8px;width:2px;background:linear-gradient(to bottom,var(--primary-light),var(--primary));border-radius:2px;opacity:.4}
.timeline-item{position:relative;padding-bottom:44px}
.timeline-item:last-child{padding-bottom:0}
.timeline-dot{position:absolute;left:-48px;top:6px;width:34px;height:34px;background:#fff;border:2px solid var(--primary);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:var(--primary);z-index:1;box-shadow:0 0 0 4px var(--primary-light)}
.timeline-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-md);padding:24px 28px;transition:all var(--transition)}
.timeline-card:hover{box-shadow:var(--shadow-hover);border-color:rgba(30,95,163,.3);transform:translateY(-2px)}
.timeline-card h3{font-size:18px;font-weight:600;color:var(--text-main);margin-bottom:8px}
.timeline-card p{font-size:14px;color:var(--text-secondary);line-height:1.7}

/* split media */
.split-section{background:var(--bg)}
.split-row{display:flex;align-items:center;gap:64px;margin-bottom:80px}
.split-row:last-child{margin-bottom:0}
.split-row.flip{flex-direction:row-reverse}
.split-media{flex:0 0 48%;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-card);background:var(--primary-light);aspect-ratio:16/10;position:relative}
.split-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.split-media:hover img{transform:scale(1.03)}
.split-content{flex:1;min-width:0}
.split-tag{display:inline-block;font-size:12px;font-weight:600;color:var(--accent);background:var(--accent-light);padding:4px 12px;border-radius:16px;letter-spacing:.5px;margin-bottom:14px}
.split-content h3{font-size:26px;font-weight:700;color:var(--text-main);line-height:1.35;margin-bottom:14px}
.split-content>p{color:var(--text-secondary);font-size:15px;line-height:1.8;margin-bottom:20px}
.split-list li{display:flex;align-items:flex-start;gap:10px;padding:8px 0;font-size:15px;color:var(--text-body);line-height:1.7;border-bottom:1px dashed rgba(226,232,240,.8)}
.split-list li:last-child{border-bottom:none}
.split-list .tick{color:var(--primary);font-weight:700;flex-shrink:0;margin-top:2px}

/* resource list */
.resource-section{background:var(--card-bg);border-bottom:1px solid var(--border)}
.resource-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.resource-item{display:flex;align-items:flex-start;gap:20px;padding:28px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-md);transition:all var(--transition)}
.resource-item:hover{box-shadow:var(--shadow-hover);border-color:rgba(30,95,163,.25);transform:translateY(-2px)}
.resource-num{font-size:26px;font-weight:800;color:var(--accent);line-height:1;flex-shrink:0;min-width:40px;font-family:Inter,Arial,sans-serif}
.resource-info h3{font-size:16px;font-weight:600;color:var(--text-main);margin-bottom:6px}
.resource-info p{font-size:14px;color:var(--text-secondary);line-height:1.6}
.resource-info .link-more{display:inline-block;margin-top:10px;font-size:14px;color:var(--primary);font-weight:500}
.resource-info .link-more span{display:inline-block;transition:transform var(--transition)}
.resource-info .link-more:hover span{transform:translateX(4px)}

/* faq */
.faq-section{background:var(--bg)}
.faq-wrap{max-width:840px;margin:0 auto}
.faq-item{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-md);margin-bottom:14px;overflow:hidden;transition:box-shadow var(--transition)}
.faq-item:hover{box-shadow:var(--shadow-card)}
.faq-item.open{border-color:rgba(30,95,163,.3);box-shadow:var(--shadow-card)}
.faq-q{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;cursor:pointer;font-size:16px;font-weight:600;color:var(--text-main);transition:background var(--transition)}
.faq-q:hover{background:var(--primary-light)}
.faq-icon{width:24px;height:24px;flex-shrink:0;position:relative;border-radius:50%;background:var(--primary-light);transition:all var(--transition)}
.faq-icon::before,.faq-icon::after{content:'';position:absolute;background:var(--primary);border-radius:2px;transition:all var(--transition)}
.faq-icon::before{left:8px;right:8px;top:11px;height:2px}
.faq-icon::after{top:8px;bottom:8px;left:11px;width:2px}
.faq-item.open .faq-icon{background:var(--primary);transform:rotate(45deg)}
.faq-item.open .faq-icon::before,.faq-item.open .faq-icon::after{background:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{padding:0 24px 22px;font-size:14px;color:var(--text-secondary);line-height:1.8}

/* cta banner */
.cta-section{padding:72px 0}
.cta-banner{position:relative;background:linear-gradient(120deg,var(--primary-dark),var(--primary));border-radius:var(--radius-xl);padding:64px 56px;text-align:center;overflow:hidden;box-shadow:var(--shadow-banner)}
.cta-banner::before{content:'';position:absolute;top:-40px;right:-40px;width:200px;height:200px;border-radius:50%;background:rgba(255,255,255,.06)}
.cta-banner::after{content:'';position:absolute;bottom:-60px;left:-30px;width:160px;height:160px;border-radius:50%;background:rgba(255,255,255,.05)}
.cta-banner h2{font-size:30px;font-weight:700;color:#fff;margin-bottom:14px;position:relative}
.cta-banner p{font-size:16px;color:rgba(255,255,255,.85);max-width:480px;margin:0 auto 28px;font-family:inherit;position:relative}
.cta-banner .btn{position:relative}
.cta-banner .btn-white:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(0,0,0,.2)}

/* footer */
.site-footer{background:#0F172A;color:#94A3B8;padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:40px;padding-bottom:48px}
.footer-brand .brand-logo{margin-bottom:16px}
.footer-brand .brand-main{color:#fff}
.footer-brand .brand-sub{color:var(--accent)}
.footer-desc{font-size:14px;line-height:1.8;color:#94A3B8;max-width:300px;margin-top:12px}
.footer-col h4{font-size:15px;font-weight:600;color:#E2E8F0;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{color:#94A3B8;font-size:14px;transition:color var(--transition)}
.footer-col ul li a:hover{color:#fff}
.footer-contact li{display:flex;align-items:center;gap:10px;font-size:14px;color:#94A3B8;margin-bottom:12px}
.footer-contact svg{width:16px;height:16px;flex-shrink:0;color:var(--primary-light)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;text-align:center;font-size:13px;color:#64748B}

/* sticky cta */
.sticky-cta{position:fixed;left:0;right:0;bottom:0;z-index:90;background:var(--primary);box-shadow:0 -4px 24px rgba(15,23,42,.15);padding:0;transform:translateY(100%);opacity:0;transition:all .35s ease;visibility:hidden}
.sticky-cta.show{transform:translateY(0);opacity:1;visibility:visible}
.sticky-cta-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 32px;min-height:60px}
.sticky-cta-text{font-size:15px;color:#fff;font-weight:500;display:flex;align-items:center;gap:10px}
.sticky-cta-text svg{width:20px;height:20px;flex-shrink:0}
.sticky-cta .btn-white{height:38px;padding:0 22px;font-size:14px}
.sticky-close{width:30px;height:30px;border-radius:8px;background:rgba(255,255,255,.15);color:#fff;display:inline-flex;align-items:center;justify-content:center;transition:all var(--transition);flex-shrink:0}
.sticky-close:hover{background:rgba(255,255,255,.3)}
.sticky-close svg{width:14px;height:14px}
body{padding-bottom:0}
body.has-sticky{padding-bottom:60px}

/* responsive */
@media(max-width:1024px){
  :root{--space-section:72px}
  .nav-links{gap:18px;margin-left:20px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .split-row,.split-row.flip{flex-direction:column;gap:32px}
  .split-media{flex:0 0 auto;width:100%}
  .resource-grid{grid-template-columns:1fr}
  .section-title{font-size:28px}
}
@media(max-width:768px){
  :root{--space-section:56px}
  .container{padding:0 20px}
  .nav-links{display:none}
  .nav-actions .nav-search{display:none}
  .hamburger{display:inline-flex}
  .mobile-menu{display:none}
  .mobile-menu.open{display:flex}
  .page-hero{padding:48px 0 56px;min-height:auto}
  .page-hero h1{font-size:30px}
  .page-hero .hero-desc{font-size:15px}
  .section-title{font-size:24px}
  .footer-grid{grid-template-columns:1fr}
  .timeline{padding-left:40px}
  .timeline-dot{left:-40px;width:28px;height:28px;font-size:12px}
  .timeline-card{padding:18px 20px}
  .cta-banner{padding:48px 24px}
  .cta-banner h2{font-size:24px}
  .sticky-cta-inner{padding:10px 16px;min-height:56px}
  .sticky-cta-text{font-size:13px;gap:8px}
  .sticky-cta .btn-white{height:34px;padding:0 16px;font-size:13px}
  body.has-sticky{padding-bottom:56px}
}
@media(max-width:520px){
  .dock-nav{padding:0 16px}
  .brand-main{font-size:19px}
  .brand-sub{font-size:12px}
  .page-hero .hero-actions{flex-direction:column;align-items:stretch;width:100%}
  .page-hero .hero-actions .btn{width:100%}
  .resource-item{padding:20px;flex-direction:column;gap:12px}
  .resource-num{font-size:22px}
  .faq-q{padding:16px 18px;font-size:15px}
  .footer-grid{gap:28px}
  .cta-banner p{font-size:14px}
}