/* roulang page: index */
:root {
  --primary: #1d3a8c;
  --primary-dark: #132764;
  --primary-soft: #e8edf9;
  --accent: #e0a53c;
  --accent-dark: #c68f2f;
  --bg-dark: #0d1832;
  --bg-body: #f2f5fb;
  --bg-white: #ffffff;
  --text-title: #182334;
  --text-body: #526078;
  --text-weak: #8b99ae;
  --border-line: #dfe5f0;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 10px rgba(29,58,140,.06);
  --shadow-md: 0 8px 30px rgba(29,58,140,.10);
  --shadow-lg: 0 18px 50px rgba(29,58,140,.16);
  --section-gap: 88px;
  --transition: all .3s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-body);
  color: var(--text-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-tag {
  display: inline-block;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  padding: 6px 18px;
  border-radius: 100px;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-head { text-align: center; max-width: 680px; margin: 0 auto 52px; }
.section-head h2 { font-size: 34px; font-weight: 800; color: var(--text-title); margin-bottom: 12px; line-height: 1.3; }
.section-head p { font-size: 16px; color: var(--text-body); }
.section-head-light .section-tag { background: rgba(255,255,255,.12); color: var(--accent); }
.section-head-light h2 { color: #fff; }
.section-head-light p { color: rgba(255,255,255,.72); }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  padding: 12px 28px;
  border-radius: 100px;
  transition: var(--transition);
  line-height: 1.4;
  border: 2px solid transparent;
}
.btn-accent {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 20px rgba(224,165,60,.35);
}
.btn-accent:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 10px 28px rgba(224,165,60,.45); }
.btn-accent:active { transform: translateY(0); }
.btn-accent:focus-visible { outline: 3px solid rgba(224,165,60,.5); outline-offset: 2px; }
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 20px rgba(29,58,140,.28);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 10px 28px rgba(29,58,140,.36); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:focus-visible { outline: 3px solid rgba(29,58,140,.45); outline-offset: 2px; }
.btn-ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.55);
}
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,.1); transform: translateY(-2px); }
.btn-lg { padding: 15px 38px; font-size: 16px; }

/* 头部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-line);
  box-shadow: 0 2px 12px rgba(29,58,140,.04);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 20px;
}
.logo {
  font-size: 22px;
  font-weight: 900;
  color: var(--primary);
  letter-spacing: .5px;
  white-space: nowrap;
  transition: opacity var(--transition);
}
.logo:hover { opacity: .82; }
.main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--bg-body);
  border-radius: 100px;
  padding: 4px 6px;
  border: 1px solid var(--border-line);
}
.nav-link {
  display: inline-block;
  padding: 9px 20px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-body);
  transition: var(--transition);
  white-space: nowrap;
  line-height: 1.4;
}
.nav-link:hover { color: var(--primary); background: rgba(255,255,255,.7); }
.nav-link.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(29,58,140,.24);
}
.nav-cta { padding: 10px 26px; font-size: 14px; white-space: nowrap; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--bg-body);
  border: 1px solid var(--border-line);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* Hero */
.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  padding: 120px 0 140px;
  overflow: hidden;
  isolation: isolate;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: -2;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,18,40,.92) 0%, rgba(18,32,72,.78) 55%, rgba(29,58,140,.5) 100%);
  z-index: -1;
}
.hero-inner { max-width: 860px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.22);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: 100px;
  margin-bottom: 28px;
  backdrop-filter: blur(6px);
}
.hero-badge .dot {
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  display: inline-block;
  animation: pulse 1.8s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(224,165,60,.6); }
  50% { box-shadow: 0 0 0 8px rgba(224,165,60,0); }
}
.hero h1 {
  font-size: 54px;
  font-weight: 900;
  color: #fff;
  line-height: 1.15;
  letter-spacing: 1px;
  margin-bottom: 18px;
}
.hero-subtitle {
  font-size: 18px;
  color: rgba(255,255,255,.82);
  max-width: 640px;
  margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 42px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-tags span {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  color: rgba(255,255,255,.85);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 100px;
}

/* Stats */
.stats {
  position: relative;
  z-index: 3;
  margin-top: -60px;
  padding: 0 24px;
}
.stats-grid {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
}
.stat-item {
  padding: 36px 20px;
  text-align: center;
  border-right: 1px solid var(--border-line);
  transition: background var(--transition);
}
.stat-item:last-child { border-right: none; }
.stat-item:hover { background: var(--primary-soft); }
.stat-num {
  display: block;
  font-size: 42px;
  font-weight: 900;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 14px;
  color: var(--text-body);
  font-weight: 500;
}

/* Categories */
.categories { padding: var(--section-gap) 0; background: var(--bg-white); }
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.category-card {
  background: #fff;
  border: 1px solid var(--border-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  box-shadow: 0 2px 8px rgba(29,58,140,.04);
}
.category-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(29,58,140,.15);
}
.category-img {
  position: relative;
  height: 220px;
  overflow: hidden;
}
.category-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.category-card:hover .category-img img { transform: scale(1.06); }
.category-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(13,24,50,.28) 100%);
}
.category-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 100px;
  box-shadow: 0 4px 12px rgba(224,165,60,.35);
}
.category-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.category-body h3 { font-size: 22px; font-weight: 800; color: var(--text-title); margin-bottom: 10px; }
.category-body p { font-size: 14px; color: var(--text-body); margin-bottom: 20px; flex: 1; }
.category-link {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .3s ease;
}
.category-link i { font-style: normal; font-size: 18px; transition: transform .3s ease; }
.category-card:hover .category-link i { transform: translateX(4px); }

/* About */
.about { padding: var(--section-gap) 0; background: var(--bg-body); }
.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.about-visual img { width: 100%; height: 420px; object-fit: cover; }
.about-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255,255,255,.35);
  border-radius: var(--radius-lg);
  pointer-events: none;
}
.about-content h2 { font-size: 32px; font-weight: 800; color: var(--text-title); margin-bottom: 18px; }
.about-content p { font-size: 16px; line-height: 1.8; margin-bottom: 24px; }
.about-list { margin-bottom: 30px; }
.about-list li {
  font-size: 15px;
  color: var(--text-body);
  padding: 7px 0;
  display: flex;
  align-items: center;
  gap: 12px;
}
.check-mark {
  display: inline-flex;
  width: 22px;
  height: 22px;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 800;
  flex-shrink: 0;
}

/* News */
.news { padding: var(--section-gap) 0; background: var(--bg-white); }
.news-list { max-width: 960px; margin: 0 auto; display: flex; flex-direction: column; gap: 20px; }
.news-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 26px 28px;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(29,58,140,.03);
}
.news-card:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(29,58,140,.18);
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}
.news-cat {
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  padding: 3px 14px;
  border-radius: 100px;
}
.news-time { font-size: 13px; color: var(--text-weak); }
.news-title { font-size: 20px; font-weight: 700; color: var(--text-title); margin-bottom: 8px; line-height: 1.4; }
.news-title:hover { color: var(--primary); }
.news-excerpt {
  font-size: 14px;
  color: var(--text-body);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-empty {
  text-align: center;
  padding: 60px 30px;
  background: var(--bg-body);
  border-radius: var(--radius-md);
  color: var(--text-body);
  font-size: 16px;
}

/* Process */
.process {
  padding: var(--section-gap) 0;
  background: var(--bg-dark);
  background-image: linear-gradient(135deg, #0d1832 0%, #132764 100%);
  position: relative;
  overflow: hidden;
}
.process::before {
  content: '';
  position: absolute;
  top: -150px;
  right: -150px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(224,165,60,.08);
  filter: blur(60px);
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
  z-index: 2;
}
.process-item {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-lg);
  padding: 40px 30px;
  text-align: center;
  transition: var(--transition);
  backdrop-filter: blur(4px);
}
.process-item:hover {
  background: rgba(255,255,255,.09);
  transform: translateY(-6px);
}
.process-num {
  display: block;
  font-size: 48px;
  font-weight: 900;
  color: var(--accent);
  opacity: .8;
  margin-bottom: 16px;
  line-height: 1;
}
.process-item h3 { font-size: 22px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.process-item p { font-size: 14px; color: rgba(255,255,255,.7); }

/* Trending */
.trending { padding: var(--section-gap) 0; background: var(--bg-body); }
.trending-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  max-width: 960px;
  margin: 0 auto;
}
.trending-item {
  display: flex;
  align-items: center;
  gap: 18px;
  background: #fff;
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(29,58,140,.03);
}
.trending-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: rgba(29,58,140,.15);
}
.trend-rank {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 18px;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(29,58,140,.25);
}
.trending-item:nth-child(2) .trend-rank { background: var(--accent); box-shadow: 0 4px 12px rgba(224,165,60,.3); }
.trending-item:nth-child(3) .trend-rank { background: #4a678f; }
.trend-info { flex: 1; min-width: 0; }
.trend-info h3 { font-size: 16px; font-weight: 700; color: var(--text-title); margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.trend-info p { font-size: 13px; color: var(--text-weak); }
.trend-heat {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-body);
  background: var(--bg-body);
  padding: 4px 14px;
  border-radius: 100px;
  white-space: nowrap;
}

/* FAQ */
.faq { padding: var(--section-gap) 0; background: var(--bg-white); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(29,58,140,.22); box-shadow: var(--shadow-sm); }
.faq-item summary {
  cursor: pointer;
  padding: 20px 26px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-title);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: background var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 24px;
  font-weight: 400;
  color: var(--primary);
  transition: transform .3s ease;
  flex-shrink: 0;
  line-height: 1;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item[open] summary { background: var(--primary-soft); }
.faq-answer { padding: 4px 26px 24px; }
.faq-answer p { font-size: 15px; color: var(--text-body); line-height: 1.8; }

/* CTA */
.cta {
  position: relative;
  padding: 100px 0;
  text-align: center;
  overflow: hidden;
  isolation: isolate;
}
.cta-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: -2;
}
.cta-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,18,40,.88) 0%, rgba(19,39,100,.82) 100%);
  z-index: -1;
}
.cta-content { max-width: 700px; margin: 0 auto; }
.cta-content h2 { font-size: 40px; font-weight: 900; color: #fff; margin-bottom: 16px; }
.cta-content p { font-size: 18px; color: rgba(255,255,255,.82); margin-bottom: 34px; }

/* Footer */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,.72);
  padding: 70px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 50px;
}
.footer-logo {
  font-size: 22px;
  font-weight: 900;
  color: #fff;
  letter-spacing: .5px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  margin-top: 16px;
  color: rgba(255,255,255,.6);
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,.62);
  padding: 5px 0;
  transition: color var(--transition), padding-left var(--transition);
}
.footer-col a:hover { color: var(--accent); padding-left: 6px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 22px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,.45);
}

/* 响应式 */
@media (max-width: 1024px) {
  :root { --section-gap: 72px; }
  .hero h1 { font-size: 44px; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .about-inner { grid-template-columns: 1fr; gap: 40px; }
  .about-visual img { height: 340px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .process-grid { gap: 20px; }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
    order: 3;
  }
  .header-inner {
    flex-wrap: wrap;
    min-height: auto;
    padding: 14px 0;
  }
  .logo { order: 1; }
  .nav-cta { display: none; }
  .main-nav {
    order: 4;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    background: transparent;
    border: none;
    padding: 0;
    border-radius: 0;
    gap: 4px;
    display: none;
  }
  .main-nav.open { display: flex; }
  .nav-link {
    text-align: center;
    padding: 12px 18px;
    border-radius: var(--radius-sm);
  }
  .nav-link.active {
    background: var(--primary);
    color: #fff;
  }
  .hero { padding: 90px 0 140px; min-height: auto; }
  .hero h1 { font-size: 34px; }
  .hero-subtitle { font-size: 16px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-item { padding: 26px 16px; border-bottom: 1px solid var(--border-line); }
  .stat-item:nth-child(2n) { border-right: none; }
  .stat-item:last-child { border-bottom: none; }
  .category-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .trending-grid { grid-template-columns: 1fr; }
  .faq-item summary { padding: 16px 18px; font-size: 15px; }
  .faq-answer { padding: 0 18px 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .cta-content h2 { font-size: 30px; }
  .cta-content p { font-size: 16px; }
  .section-head h2 { font-size: 28px; }
  .section-head p { font-size: 15px; }
}

@media (max-width: 520px) {
  .hero h1 { font-size: 28px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat-item { border-right: none; border-bottom: 1px solid var(--border-line); }
  .stat-item:last-child { border-bottom: none; }
  .about-visual img { height: 260px; }
  .news-card { padding: 20px; }
  .trending-item { flex-wrap: wrap; }
  .trend-heat { margin-left: 64px; }
}

/* roulang page: article */
:root {
        --primary: #0e7c5a;
        --primary-light: #10a37f;
        --primary-dark: #095c42;
        --accent: #f5b544;
        --dark: #0b1b25;
        --dark-2: #122a38;
        --bg: #f4f7fb;
        --bg-light: #eef2f7;
        --white: #ffffff;
        --text: #152232;
        --text-light: #5e6d82;
        --text-lighter: #8a96ab;
        --border: #e2e8f0;
        --radius-lg: 20px;
        --radius-md: 14px;
        --radius-sm: 8px;
        --shadow-sm: 0 4px 15px rgba(11, 27, 37, 0.06);
        --shadow-md: 0 8px 30px rgba(11, 27, 37, 0.10);
        --shadow-lg: 0 20px 50px rgba(11, 27, 37, 0.16);
        --transition: all 0.25s ease;
        --font: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    }
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }
    html {
        scroll-behavior: smooth;
    }
    body {
        font-family: var(--font);
        background: var(--bg);
        color: var(--text);
        line-height: 1.7;
        font-size: 16px;
        -webkit-font-smoothing: antialiased;
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: var(--transition);
    }
    button {
        border: none;
        background: none;
        cursor: pointer;
        font-family: inherit;
    }
    input {
        font-family: inherit;
    }
    .container {
        width: 100%;
        max-width: 1240px;
        margin: 0 auto;
        padding: 0 24px;
    }
    .site-header {
        background: rgba(11, 27, 37, 0.95);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        box-shadow: 0 4px 24px rgba(0, 0, 0, 0.18);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 72px;
        gap: 24px;
    }
    .logo {
        font-size: 22px;
        font-weight: 700;
        color: #ffffff;
        letter-spacing: 0.5px;
        position: relative;
        padding-left: 34px;
        flex-shrink: 0;
        transition: var(--transition);
    }
    .logo::before {
        content: '';
        position: absolute;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
        width: 26px;
        height: 26px;
        border-radius: 8px;
        background: linear-gradient(135deg, var(--primary-light), var(--primary));
        box-shadow: 0 4px 12px rgba(16, 163, 127, 0.4);
    }
    .logo:hover {
        color: var(--accent);
    }
    .nav-toggle {
        display: none;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        padding: 10px;
        border-radius: var(--radius-sm);
    }
    .nav-toggle span {
        width: 24px;
        height: 2px;
        background: #fff;
        border-radius: 2px;
        transition: var(--transition);
    }
    .nav-toggle.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
    .main-nav {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .nav-link {
        color: rgba(255, 255, 255, 0.72);
        font-size: 15px;
        font-weight: 500;
        padding: 10px 20px;
        border-radius: 50px;
        border: 1px solid transparent;
        transition: var(--transition);
        white-space: nowrap;
    }
    .nav-link:hover {
        color: #fff;
        background: rgba(255, 255, 255, 0.08);
        border-color: rgba(255, 255, 255, 0.12);
        transform: translateY(-1px);
    }
    .nav-link.active {
        color: #fff;
        background: rgba(16, 163, 127, 0.18);
        border-color: rgba(16, 163, 127, 0.4);
    }
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 28px;
        border-radius: 50px;
        font-size: 15px;
        font-weight: 600;
        line-height: 1.2;
        transition: var(--transition);
        text-align: center;
        border: 2px solid transparent;
    }
    .btn-primary {
        background: linear-gradient(135deg, var(--primary-light), var(--primary));
        color: #fff;
        box-shadow: 0 8px 24px rgba(16, 163, 127, 0.3);
    }
    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 32px rgba(16, 163, 127, 0.42);
        color: #fff;
    }
    .btn-outline {
        background: transparent;
        border-color: rgba(255, 255, 255, 0.5);
        color: #fff;
    }
    .btn-outline:hover {
        border-color: #fff;
        background: rgba(255, 255, 255, 0.1);
    }
    .nav-cta {
        padding: 10px 24px;
        font-size: 14px;
        flex-shrink: 0;
    }
    .article-hero {
        position: relative;
        padding: 140px 0 72px;
        background: linear-gradient(120deg, rgba(11, 27, 37, 0.88), rgba(14, 124, 90, 0.72)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        color: #fff;
        text-align: center;
        border-bottom: 4px solid var(--accent);
    }
    .breadcrumb {
        display: flex;
        justify-content: center;
        gap: 8px;
        font-size: 13px;
        color: rgba(255, 255, 255, 0.6);
        margin-bottom: 20px;
        flex-wrap: wrap;
    }
    .breadcrumb a {
        color: rgba(255, 255, 255, 0.75);
        transition: var(--transition);
    }
    .breadcrumb a:hover {
        color: var(--accent);
    }
    .breadcrumb span {
        color: rgba(255, 255, 255, 0.45);
    }
    .breadcrumb-current {
        color: var(--accent);
        max-width: 300px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    .article-hero h1 {
        font-size: 38px;
        line-height: 1.3;
        font-weight: 700;
        max-width: 860px;
        margin: 0 auto 18px;
        letter-spacing: 0.5px;
    }
    .article-meta {
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 16px;
        flex-wrap: wrap;
        font-size: 14px;
        color: rgba(255, 255, 255, 0.75);
    }
    .badge {
        display: inline-block;
        padding: 5px 16px;
        border-radius: 50px;
        font-size: 13px;
        font-weight: 600;
        background: rgba(245, 181, 68, 0.2);
        color: var(--accent);
        border: 1px solid rgba(245, 181, 68, 0.4);
    }
    .article-layout {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 360px;
        gap: 44px;
        padding: 56px 0 80px;
    }
    .article-main {
        min-width: 0;
        background: var(--white);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-sm);
        padding: 40px 44px;
    }
    .article-cover {
        border-radius: var(--radius-md);
        overflow: hidden;
        margin-bottom: 32px;
        box-shadow: var(--shadow-sm);
    }
    .article-cover img {
        width: 100%;
        height: 280px;
        object-fit: cover;
    }
    .article-content {
        font-size: 16px;
        line-height: 1.9;
        color: var(--text);
    }
    .article-content h2 {
        font-size: 24px;
        margin: 36px 0 16px;
        color: var(--dark);
        padding-left: 16px;
        border-left: 4px solid var(--primary);
        line-height: 1.4;
    }
    .article-content h3 {
        font-size: 20px;
        margin: 28px 0 14px;
        color: var(--dark);
        line-height: 1.5;
    }
    .article-content p {
        margin-bottom: 18px;
    }
    .article-content img {
        max-width: 100%;
        border-radius: var(--radius-md);
        margin: 20px 0;
        box-shadow: var(--shadow-sm);
    }
    .article-content ul,
    .article-content ol {
        margin: 0 0 20px 1.6em;
    }
    .article-content li {
        margin-bottom: 8px;
    }
    .article-content blockquote {
        border-left: 4px solid var(--primary);
        padding: 16px 24px;
        background: #f0f7f4;
        border-radius: 12px;
        margin: 24px 0;
        font-style: italic;
        color: var(--text-light);
    }
    .article-content a {
        color: var(--primary);
        text-decoration: underline;
    }
    .article-content a:hover {
        color: var(--primary-dark);
    }
    .article-content table {
        width: 100%;
        border-collapse: collapse;
        margin: 20px 0;
        font-size: 15px;
    }
    .article-content th,
    .article-content td {
        padding: 12px 16px;
        border: 1px solid var(--border);
        text-align: left;
    }
    .article-content th {
        background: var(--bg-light);
        font-weight: 600;
    }
    .article-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-top: 36px;
        padding-top: 28px;
        border-top: 1px solid var(--border);
    }
    .tag-chip {
        display: inline-flex;
        align-items: center;
        padding: 7px 16px;
        background: var(--bg-light);
        border: 1px solid var(--border);
        border-radius: 50px;
        font-size: 13px;
        color: var(--text-light);
        transition: var(--transition);
    }
    .tag-chip:hover {
        background: var(--primary);
        color: #fff;
        border-color: var(--primary);
        transform: translateY(-2px);
    }
    .article-share {
        display: flex;
        align-items: center;
        gap: 14px;
        margin-top: 28px;
        padding-top: 22px;
        border-top: 1px solid var(--border);
        flex-wrap: wrap;
    }
    .share-label {
        font-size: 14px;
        font-weight: 600;
        color: var(--text-light);
    }
    .share-btn {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 14px;
        font-weight: 700;
        color: #fff;
        transition: var(--transition);
        border: none;
    }
    .share-btn:hover {
        transform: translateY(-3px) scale(1.05);
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    }
    .share-wechat {
        background: #07c160;
    }
    .share-weibo {
        background: #e6162d;
    }
    .share-qq {
        background: #12b7f5;
    }
    .article-not-found {
        text-align: center;
        padding: 100px 40px;
    }
    .not-found-icon {
        font-size: 72px;
        margin-bottom: 24px;
        line-height: 1;
    }
    .article-not-found h2 {
        font-size: 28px;
        color: var(--dark);
        margin-bottom: 12px;
    }
    .article-not-found p {
        color: var(--text-light);
        margin-bottom: 28px;
        max-width: 360px;
        margin-left: auto;
        margin-right: auto;
    }
    .empty-text {
        color: var(--text-lighter);
        font-size: 14px;
        text-align: center;
        padding: 20px 0;
    }
    .article-sidebar {
        display: flex;
        flex-direction: column;
        gap: 28px;
    }
    .sidebar-card {
        background: var(--white);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-sm);
        padding: 28px;
        transition: var(--transition);
    }
    .sidebar-card:hover {
        box-shadow: var(--shadow-md);
    }
    .sidebar-title {
        font-size: 18px;
        font-weight: 700;
        color: var(--dark);
        margin-bottom: 20px;
        padding-bottom: 14px;
        border-bottom: 2px solid var(--bg-light);
        position: relative;
    }
    .sidebar-title::after {
        content: '';
        position: absolute;
        left: 0;
        bottom: -2px;
        width: 42px;
        height: 2px;
        background: var(--primary);
        border-radius: 2px;
    }
    .sidebar-list {
        list-style: none;
    }
    .sidebar-list li {
        border-bottom: 1px solid var(--bg-light);
        transition: var(--transition);
    }
    .sidebar-list li:last-child {
        border-bottom: none;
    }
    .sidebar-list a {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 12px 0;
        gap: 12px;
    }
    .list-title {
        font-size: 14px;
        color: var(--text);
        line-height: 1.5;
        flex: 1;
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .sidebar-list a:hover .list-title {
        color: var(--primary);
    }
    .list-date {
        font-size: 12px;
        color: var(--text-lighter);
        flex-shrink: 0;
    }
    .sidebar-cats {
        display: flex;
        flex-direction: column;
        gap: 8px;
    }
    .cat-link {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 14px 18px;
        background: var(--bg-light);
        border-radius: var(--radius-sm);
        font-size: 14px;
        font-weight: 500;
        color: var(--text);
        transition: var(--transition);
        border: 1px solid transparent;
    }
    .cat-link:hover {
        background: var(--white);
        border-color: var(--primary);
        color: var(--primary);
        transform: translateX(4px);
    }
    .cat-link .cat-arrow {
        color: var(--text-lighter);
        transition: var(--transition);
    }
    .cat-link:hover .cat-arrow {
        color: var(--primary);
        transform: translateX(3px);
    }
    .sidebar-search {
        display: flex;
        gap: 0;
        background: var(--bg-light);
        border-radius: 50px;
        border: 1px solid var(--border);
        overflow: hidden;
        transition: var(--transition);
    }
    .sidebar-search:focus-within {
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(14, 124, 90, 0.12);
    }
    .sidebar-search input {
        flex: 1;
        padding: 12px 18px;
        border: none;
        background: transparent;
        outline: none;
        font-size: 14px;
    }
    .sidebar-search button {
        padding: 10px 18px;
        background: var(--primary);
        color: #fff;
        font-size: 14px;
        font-weight: 600;
        transition: var(--transition);
    }
    .sidebar-search button:hover {
        background: var(--primary-dark);
    }
    .related-section {
        background: var(--white);
        padding: 72px 0;
        border-top: 1px solid var(--border);
    }
    .section-header {
        text-align: center;
        margin-bottom: 44px;
    }
    .section-subtitle {
        font-size: 14px;
        color: var(--primary);
        font-weight: 600;
        letter-spacing: 3px;
        text-transform: uppercase;
        display: block;
        margin-bottom: 10px;
    }
    .section-title {
        font-size: 30px;
        font-weight: 700;
        color: var(--dark);
        line-height: 1.3;
    }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .news-card {
        background: var(--bg);
        border-radius: var(--radius-lg);
        overflow: hidden;
        transition: var(--transition);
        border: 1px solid var(--border);
        display: flex;
        flex-direction: column;
    }
    .news-card:hover {
        box-shadow: var(--shadow-lg);
        transform: translateY(-6px);
        border-color: transparent;
    }
    .card-cover {
        position: relative;
        height: 180px;
        overflow: hidden;
    }
    .card-cover img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.5s ease;
    }
    .news-card:hover .card-cover img {
        transform: scale(1.06);
    }
    .card-cover::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, transparent 40%, rgba(11, 27, 37, 0.3));
    }
    .card-cat {
        position: absolute;
        top: 14px;
        left: 14px;
        z-index: 2;
        background: rgba(14, 124, 90, 0.9);
        color: #fff;
        font-size: 12px;
        padding: 5px 14px;
        border-radius: 50px;
        font-weight: 600;
    }
    .card-body {
        padding: 22px 24px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .card-body h3 {
        font-size: 17px;
        line-height: 1.5;
        color: var(--dark);
        margin-bottom: 10px;
        font-weight: 600;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .card-body p {
        font-size: 14px;
        color: var(--text-light);
        line-height: 1.6;
        flex: 1;
        margin-bottom: 14px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .card-link {
        font-size: 14px;
        font-weight: 600;
        color: var(--primary);
        display: flex;
        align-items: center;
        gap: 6px;
        transition: var(--transition);
    }
    .card-link:hover {
        color: var(--primary-dark);
        gap: 10px;
    }
    .faq-section {
        background: var(--bg);
        padding: 80px 0;
    }
    .faq-layout {
        max-width: 820px;
        margin: 0 auto;
    }
    .faq-item {
        background: var(--white);
        border-radius: var(--radius-md);
        margin-bottom: 16px;
        box-shadow: var(--shadow-sm);
        overflow: hidden;
        transition: var(--transition);
        border: 1px solid var(--border);
    }
    .faq-item:hover {
        box-shadow: var(--shadow-md);
    }
    .faq-question {
        width: 100%;
        padding: 20px 24px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 16px;
        font-size: 16px;
        font-weight: 600;
        color: var(--dark);
        background: var(--white);
        text-align: left;
        transition: var(--transition);
    }
    .faq-question:hover {
        color: var(--primary);
    }
    .faq-question .faq-icon {
        flex-shrink: 0;
        width: 24px;
        height: 24px;
        border-radius: 50%;
        background: var(--bg-light);
        color: var(--text-light);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        transition: var(--transition);
    }
    .faq-item.open .faq-icon {
        background: var(--primary);
        color: #fff;
        transform: rotate(45deg);
    }
    .faq-answer {
        padding: 0 24px;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.4s ease;
        font-size: 15px;
        color: var(--text-light);
        line-height: 1.8;
    }
    .faq-item.open .faq-answer {
        max-height: 500px;
        padding: 0 24px 22px;
    }
    .cta-section {
        background: linear-gradient(120deg, var(--dark) 0%, var(--dark-2) 50%, var(--primary-dark) 100%);
        padding: 72px 0;
        position: relative;
        overflow: hidden;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        top: -40%;
        right: -10%;
        width: 440px;
        height: 440px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(16, 163, 127, 0.25), transparent 70%);
    }
    .cta-box {
        text-align: center;
        position: relative;
        z-index: 2;
    }
    .cta-title {
        font-size: 30px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 14px;
    }
    .cta-desc {
        font-size: 16px;
        color: rgba(255, 255, 255, 0.7);
        max-width: 560px;
        margin: 0 auto 32px;
        line-height: 1.7;
    }
    .cta-buttons {
        display: flex;
        justify-content: center;
        gap: 16px;
        flex-wrap: wrap;
    }
    .site-footer {
        background: var(--dark);
        color: rgba(255, 255, 255, 0.7);
        padding: 72px 0 0;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.6fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 48px;
    }
    .footer-logo {
        font-size: 22px;
        font-weight: 700;
        color: #fff;
        display: block;
        margin-bottom: 16px;
    }
    .footer-brand p {
        font-size: 14px;
        line-height: 1.8;
        color: rgba(255, 255, 255, 0.55);
        max-width: 320px;
    }
    .footer-col h4 {
        color: #fff;
        font-size: 16px;
        margin-bottom: 18px;
        position: relative;
        padding-bottom: 10px;
    }
    .footer-col h4::after {
        content: '';
        position: absolute;
        left: 0;
        bottom: 0;
        width: 28px;
        height: 2px;
        background: var(--primary-light);
        border-radius: 2px;
    }
    .footer-col a {
        display: block;
        color: rgba(255, 255, 255, 0.55);
        font-size: 14px;
        margin-bottom: 12px;
        transition: var(--transition);
    }
    .footer-col a:hover {
        color: var(--accent);
        padding-left: 6px;
    }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding: 22px 0;
        text-align: center;
        font-size: 14px;
        color: rgba(255, 255, 255, 0.4);
    }
    @media (max-width: 1024px) {
        .article-layout {
            grid-template-columns: 1fr 300px;
            gap: 28px;
            padding: 40px 0 60px;
        }
        .article-main {
            padding: 32px 28px;
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr 1fr;
        }
        .footer-brand {
            grid-column: 1 / -1;
        }
        .related-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }
    @media (max-width: 768px) {
        .container {
            padding: 0 18px;
        }
        .nav-toggle {
            display: flex;
            z-index: 1001;
        }
        .main-nav {
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: var(--dark);
            flex-direction: column;
            justify-content: flex-start;
            align-items: flex-start;
            gap: 8px;
            padding: 100px 24px 30px;
            transition: right 0.4s ease;
            box-shadow: -10px 0 30px rgba(0, 0, 0, 0.2);
        }
        .main-nav.open {
            right: 0;
        }
        .nav-link {
            font-size: 16px;
            padding: 12px 20px;
            width: 100%;
            border-radius: var(--radius-sm);
        }
        .nav-cta {
            display: none;
        }
        .article-hero {
            padding: 110px 0 50px;
        }
        .article-hero h1 {
            font-size: 28px;
        }
        .article-layout {
            grid-template-columns: 1fr;
            padding: 32px 0 50px;
        }
        .article-main {
            padding: 24px 20px;
            border-radius: var(--radius-md);
        }
        .article-sidebar {
            order: -1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .sidebar-card {
            padding: 20px;
        }
        .sidebar-card:last-child {
            grid-column: 1 / -1;
        }
        .related-grid {
            grid-template-columns: 1fr;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 28px;
        }
        .faq-question {
            font-size: 15px;
            padding: 18px 18px;
        }
        .faq-answer {
            padding: 0 18px;
        }
        .faq-item.open .faq-answer {
            padding: 0 18px 20px;
        }
        .cta-title {
            font-size: 24px;
        }
    }
    @media (max-width: 520px) {
        .article-hero h1 {
            font-size: 23px;
        }
        .article-meta {
            gap: 10px;
        }
        .article-main {
            padding: 18px 16px;
        }
        .article-content {
            font-size: 15px;
        }
        .article-content h2 {
            font-size: 20px;
        }
        .article-sidebar {
            grid-template-columns: 1fr;
        }
        .related-grid {
            grid-template-columns: 1fr;
        }
        .section-title {
            font-size: 24px;
        }
        .cta-buttons .btn {
            width: 100%;
        }
        .card-cover {
            height: 200px;
        }
        .breadcrumb {
            font-size: 12px;
        }
        .article-cover img {
            height: 200px;
        }
    }
    @media (max-width: 1024px) and (min-width: 769px) {
        .main-nav .nav-link {
            padding: 8px 14px;
            font-size: 14px;
        }
        .nav-cta {
            padding: 8px 18px;
            font-size: 13px;
        }
    }

/* roulang page: category1 */
:root {
            --primary: #6c4cf4;
            --primary-dark: #5536d8;
            --primary-light: #8f76ff;
            --accent: #ffb347;
            --accent-soft: #fff3df;
            --bg: #f6f7fb;
            --bg-deep: #0f1020;
            --surface: #ffffff;
            --text: #1a1d2e;
            --text-weak: #6b7185;
            --text-invert: #ffffff;
            --border: #e6e8f0;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-full: 999px;
            --shadow-sm: 0 2px 10px rgba(20, 20, 40, 0.06);
            --shadow-md: 0 8px 30px rgba(20, 20, 40, 0.08);
            --shadow-lg: 0 16px 50px rgba(20, 20, 40, 0.12);
            --spacing-section: clamp(3rem, 6vw, 5.5rem);
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 88px;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(108, 76, 244, 0.45);
            outline-offset: 2px;
            border-radius: 6px;
        }

        .container {
            width: min(var(--container), 100% - 48px);
            margin-inline: auto;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.86);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
        }

        .header-inner {
            display: flex;
            align-items: center;
            gap: 24px;
            height: 72px;
        }

        .logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 15px;
            font-weight: 600;
            color: var(--text-weak);
            transition: all 0.25s ease;
            white-space: nowrap;
        }

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

        .nav-link.active {
            background: var(--primary);
            color: var(--text-invert);
            box-shadow: 0 4px 16px rgba(108, 76, 244, 0.32);
        }

        .nav-cta {
            margin-left: auto;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-full);
            font-size: 15px;
            font-weight: 700;
            transition: all 0.25s ease;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: var(--text-invert);
            box-shadow: 0 6px 20px rgba(108, 76, 244, 0.28);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(108, 76, 244, 0.34);
        }

        .btn-secondary {
            background: var(--surface);
            color: var(--text);
            border: 1px solid var(--border);
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        .btn-light {
            background: #fff;
            color: var(--primary-dark);
        }

        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(0, 0, 0, 0.16);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.32);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.22);
            transform: translateY(-2px);
        }

        /* Hero */
        .page-hero {
            position: relative;
            background: linear-gradient(120deg, rgba(15, 16, 32, 0.9), rgba(30, 22, 60, 0.74)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: clamp(3rem, 7vw, 6rem) 0;
            text-align: center;
            color: #fff;
            overflow: hidden;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -40%;
            right: -10%;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(108, 76, 244, 0.4), transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin-inline: auto;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.22);
            backdrop-filter: blur(6px);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            margin-bottom: 20px;
        }

        .page-hero h1 {
            font-size: clamp(2rem, 4.5vw, 3.2rem);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -1px;
            margin-bottom: 18px;
        }

        .page-hero p {
            font-size: clamp(1rem, 1.6vw, 1.15rem);
            color: rgba(255, 255, 255, 0.82);
            max-width: 640px;
            margin: 0 auto 32px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Section */
        .section {
            padding: var(--spacing-section) 0;
        }

        .section-alt {
            background: var(--surface);
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 36px;
        }

        .section-head h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            letter-spacing: -0.5px;
            position: relative;
            padding-bottom: 12px;
        }

        .section-head h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 44px;
            height: 4px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }

        .section-sub {
            color: var(--text-weak);
            max-width: 640px;
        }

        .text-center .section-sub {
            margin-inline: auto;
        }

        /* Stats */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-sm);
        }

        .stat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(108, 76, 244, 0.3);
        }

        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
        }

        .stat-label {
            color: var(--text-weak);
            font-size: 14px;
            font-weight: 600;
            margin-top: 8px;
        }

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

        .card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all 0.35s ease;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }

        .card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(108, 76, 244, 0.25);
        }

        .card-cover {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }

        .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .card:hover .card-cover img {
            transform: scale(1.06);
        }

        .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(15, 16, 32, 0.72);
            backdrop-filter: blur(6px);
            color: var(--accent);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: var(--radius-full);
        }

        .card-body {
            padding: 22px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }

        .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.45;
        }

        .card-body p {
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.7;
            flex: 1;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            color: var(--text-weak);
            font-size: 13px;
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }

        /* Chip Tabs */
        .chip-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }

        .chip-tab {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-full);
            background: var(--surface);
            border: 1px solid var(--border);
            font-weight: 600;
            color: var(--text);
            transition: all 0.25s ease;
            box-shadow: var(--shadow-sm);
        }

        .chip-tab i {
            font-style: normal;
            color: var(--primary);
        }

        .chip-tab:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .chip-tab.featured {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 6px 20px rgba(108, 76, 244, 0.3);
        }

        .chip-tab.featured i {
            color: var(--accent);
        }

        /* Featured Split */
        .featured-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .featured-media {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .featured-media img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
        }

        .featured-content h3 {
            font-size: 26px;
            font-weight: 800;
            line-height: 1.4;
            margin-bottom: 16px;
        }

        .featured-content p {
            color: var(--text-weak);
            margin-bottom: 18px;
        }

        .check-list {
            list-style: none;
            display: grid;
            gap: 14px;
            margin: 20px 0 28px;
        }

        .check-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            font-size: 15px;
        }

        .check-list i {
            font-style: normal;
            color: var(--primary);
            font-weight: 800;
            font-size: 18px;
            line-height: 1.4;
        }

        /* News List */
        .news-list {
            display: grid;
            gap: 16px;
        }

        .news-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            transition: all 0.3s ease;
        }

        .news-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateX(6px);
        }

        .news-date {
            flex-shrink: 0;
            text-align: center;
            min-width: 62px;
            padding: 8px 12px;
            background: var(--bg);
            border-radius: var(--radius-sm);
        }

        .news-date span {
            display: block;
        }

        .news-date .day {
            font-size: 1.4rem;
            font-weight: 800;
            line-height: 1.1;
            color: var(--primary);
        }

        .news-date .month {
            font-size: 12px;
            color: var(--text-weak);
            font-weight: 600;
            margin-top: 2px;
        }

        .news-main h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .news-main p {
            font-size: 14px;
            color: var(--text-weak);
        }

        .news-arrow {
            margin-left: auto;
            color: var(--text-weak);
            font-size: 20px;
            transition: all 0.3s ease;
        }

        .news-item:hover .news-arrow {
            color: var(--primary);
            transform: translateX(4px);
        }

        /* FAQ */
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
            display: grid;
            gap: 14px;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(108, 76, 244, 0.3);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding: 20px 24px;
            font-weight: 700;
            font-size: 16px;
            cursor: pointer;
            user-select: none;
        }

        .faq-question .icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--bg);
            color: var(--primary);
            font-weight: 700;
            font-size: 18px;
            transition: all 0.3s ease;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 22px;
            color: var(--text-weak);
            font-size: 15px;
            line-height: 1.8;
        }

        /* CTA */
        .cta-block {
            position: relative;
            background: linear-gradient(120deg, #0f1020, #1c1638), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-radius: var(--radius-lg);
            padding: clamp(2.5rem, 5vw, 4.5rem);
            text-align: center;
            color: #fff;
            overflow: hidden;
        }

        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(108, 76, 244, 0.28), rgba(255, 179, 71, 0.18));
        }

        .cta-inner {
            position: relative;
            z-index: 2;
        }

        .cta-inner h2 {
            font-size: clamp(1.7rem, 3vw, 2.4rem);
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-inner p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 28px;
        }

        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background: #0d0e1c;
            color: rgba(255, 255, 255, 0.7);
            padding: 52px 0 0;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 800;
            background: linear-gradient(120deg, #fff, var(--primary-light));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .footer-brand p {
            margin-top: 14px;
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 8px;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 3px;
            border-radius: 2px;
            background: var(--primary);
        }

        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            padding: 6px 0;
            transition: all 0.25s ease;
        }

        .footer-col a:hover {
            color: var(--accent);
            padding-left: 6px;
        }

        .footer-bottom {
            padding: 22px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

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

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

            .featured-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

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

        @media (max-width: 768px) {
            .header-inner {
                gap: 14px;
            }

            .main-nav {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--surface);
                border-bottom: 1px solid var(--border);
                flex-direction: column;
                padding: 16px 20px;
                gap: 8px;
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.35s ease;
                box-shadow: var(--shadow-lg);
                align-items: stretch;
                z-index: 99;
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }

            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
            }

            .nav-link {
                display: block;
                text-align: center;
                padding: 12px 16px;
            }

            .nav-cta {
                display: none;
            }

            .nav-toggle {
                display: flex;
                margin-left: auto;
            }

            .nav-toggle.open span:nth-child(1) {
                transform: translateY(7px) rotate(45deg);
            }

            .nav-toggle.open span:nth-child(2) {
                opacity: 0;
            }

            .nav-toggle.open span:nth-child(3) {
                transform: translateY(-7px) rotate(-45deg);
            }
        }

        @media (max-width: 520px) {
            .container {
                width: calc(100% - 32px);
            }

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

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .news-item {
                flex-direction: column;
                align-items: flex-start;
            }

            .news-arrow {
                display: none;
            }

            .section-head {
                flex-direction: column;
                align-items: flex-start;
            }
        }

/* roulang page: category3 */
:root {
  --primary: #0f2b5c;
  --primary-deep: #081a38;
  --primary-light: #1c4a9e;
  --accent: #ffb03a;
  --accent-deep: #ff7e40;
  --accent-soft: #fff1dc;
  --bg: #f4f7fd;
  --surface: #ffffff;
  --text: #1e2434;
  --text-muted: #6b7182;
  --border: #e6e9f2;
  --shadow-sm: 0 2px 10px rgba(15, 43, 92, .06);
  --shadow-md: 0 8px 28px rgba(15, 43, 92, .1);
  --shadow-lg: 0 20px 50px rgba(15, 43, 92, .14);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --space-section: 84px;
  --container-w: 1160px;
  --font-main: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-digits: "Rajdhani", "Noto Sans SC", sans-serif;
}
*, *::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); line-height: 1.7; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
.container { max-width: var(--container-w); margin: 0 auto; padding: 0 24px; }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky; top: 0; z-index: 200;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(15,43,92,.04);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 20px; }
.logo { font-weight: 900; font-size: 1.5rem; color: var(--primary); letter-spacing: .5px; white-space: nowrap; }
.logo::first-letter { color: var(--accent-deep); }
.main-nav { display: flex; align-items: center; gap: 6px; background: #f0f3fa; padding: 5px; border-radius: 40px; }
.nav-link { display: inline-block; padding: 8px 20px; border-radius: 30px; font-size: .94rem; font-weight: 500; color: var(--text-muted); transition: all .25s ease; }
.nav-link:hover { color: var(--primary); background: rgba(255,255,255,.75); }
.nav-link.active { color: var(--primary); background: #fff; font-weight: 700; box-shadow: 0 2px 10px rgba(15,43,92,.08); }
.nav-cta { margin-left: 2px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-weight: 600; border-radius: 28px; padding: 10px 24px; font-size: .95rem; transition: all .25s ease; cursor: pointer; }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-deep)); color: #fff; box-shadow: 0 6px 20px rgba(255,126,64,.28); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(255,126,64,.36); }
.btn-outline { background: transparent; color: var(--primary); border: 1.5px solid rgba(15,43,92,.3); }
.btn-outline:hover { border-color: var(--primary); background: rgba(15,43,92,.04); }
.btn-light { background: #fff; color: var(--primary); box-shadow: 0 6px 20px rgba(15,43,92,.16); }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(15,43,92,.24); }
.nav-toggle { display: none; width: 44px; height: 44px; flex-direction: column; align-items: center; justify-content: center; gap: 5px; border-radius: 12px; background: var(--bg); }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--primary); border-radius: 3px; transition: all .3s ease; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Page Hero ===== */
.page-hero {
  position: relative; padding: 72px 0 64px;
  background: linear-gradient(120deg, rgba(8,26,56,.82), rgba(15,43,92,.66)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff; overflow: hidden;
}
.page-hero::after { content: ""; position: absolute; right: -80px; bottom: -80px; width: 300px; height: 300px; border: 40px solid rgba(255,255,255,.06); border-radius: 50%; pointer-events: none; }
.breadcrumb { font-size: .85rem; opacity: .78; margin-bottom: 16px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.breadcrumb a { opacity: .8; }
.breadcrumb .sep { opacity: .5; }
.hero-title { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 900; line-height: 1.25; margin-bottom: 14px; }
.hero-title .highlight { color: var(--accent); }
.hero-sub { max-width: 620px; font-size: 1.06rem; opacity: .9; margin-bottom: 28px; }
.hero-badges { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 28px; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.25); padding: 7px 17px; border-radius: 30px; font-size: .86rem; font-weight: 500; }
.hero-badge i { color: var(--accent); }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ===== Chip Filter Section ===== */
.chip-section {
  padding: 46px 0 10px;
}
.chip-head { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; margin-bottom: 24px; }
.chip-head h2 { font-size: 1.65rem; color: var(--primary); font-weight: 800; }
.chip-head p { color: var(--text-muted); font-size: .94rem; }
.chip-list { display: flex; flex-wrap: wrap; gap: 10px; }
.filter-chip {
  display: inline-flex; align-items: center; gap: 7px; padding: 9px 22px;
  background: #eef1f8; border-radius: 30px; font-size: .92rem; font-weight: 500;
  color: var(--text-muted); border: 1px solid transparent; transition: all .25s ease;
}
.filter-chip i { font-size: .85rem; opacity: .75; }
.filter-chip:hover { color: var(--primary); background: #e4eaf4; }
.filter-chip.active { background: var(--primary); color: #fff; box-shadow: 0 6px 18px rgba(15,43,92,.18); }
.filter-chip.active i { opacity: 1; }

/* ===== Featured Events ===== */
.events-section { padding: 44px 0 30px; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; flex-wrap: wrap; margin-bottom: 30px; }
.section-head h2 { font-size: 1.8rem; font-weight: 900; color: var(--primary); letter-spacing: -.3px; }
.section-head .sub { font-size: .95rem; color: var(--text-muted); max-width: 460px; }
.events-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.event-card {
  background: var(--surface); border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border);
  transition: transform .3s ease, box-shadow .3s ease;
  display: flex; flex-direction: column;
}
.event-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.event-media { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.event-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.event-card:hover .event-media img { transform: scale(1.05); }
.event-tag {
  position: absolute; top: 14px; left: 14px;
  background: rgba(255,255,255,.92); color: var(--primary);
  padding: 5px 14px; border-radius: 20px; font-size: .8rem; font-weight: 700;
  backdrop-filter: blur(4px);
}
.event-tag.hot { background: var(--accent); color: var(--primary-deep); }
.event-off { position: absolute; right: 14px; bottom: 14px; background: rgba(15,43,92,.82); color: var(--accent); padding: 4px 13px; border-radius: 20px; font-family: var(--font-digits); font-weight: 700; font-size: .95rem; backdrop-filter: blur(6px); }
.event-body { padding: 22px 22px 20px; display: flex; flex-direction: column; flex: 1; }
.event-body h3 { font-size: 1.16rem; color: var(--primary); font-weight: 800; margin-bottom: 8px; }
.event-body p { font-size: .9rem; color: var(--text-muted); flex: 1; margin-bottom: 16px; }
.event-meta { display: flex; align-items: center; justify-content: space-between; border-top: 1px dashed var(--border); padding-top: 14px; }
.event-meta .meta-item { display: flex; align-items: center; gap: 6px; font-size: .82rem; color: var(--text-muted); }
.event-meta .meta-item i { color: var(--accent-deep); }
.event-link { color: var(--primary); font-weight: 700; font-size: .88rem; display: inline-flex; align-items: center; gap: 4px; transition: gap .25s ease; }
.event-link:hover { gap: 8px; color: var(--accent-deep); }
.events-empty { display: none; text-align: center; padding: 50px 20px; color: var(--text-muted); }

/* ===== Ranking Section ===== */
.ranking-section { padding: 46px 0; background: var(--primary-deep); color: #fff; position: relative; overflow: hidden; }
.ranking-section::before { content: ""; position: absolute; top: -120px; right: -60px; width: 320px; height: 320px; border-radius: 50%; background: radial-gradient(circle, rgba(255,176,58,.14), transparent 70%); }
.ranking-section .section-head h2 { color: #fff; }
.ranking-section .section-head .sub { color: rgba(255,255,255,.65); }
.ranking-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px 36px; position: relative; z-index: 1; }
.rank-item {
  display: flex; align-items: center; gap: 16px; padding: 16px 18px;
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-md); transition: background .25s ease, transform .25s ease;
}
.rank-item:hover { background: rgba(255,255,255,.12); transform: translateX(4px); }
.rank-num { font-family: var(--font-digits); font-size: 1.7rem; font-weight: 700; color: var(--accent); opacity: .92; width: 34px; text-align: center; }
.rank-main { flex: 1; }
.rank-main h4 { font-size: 1rem; font-weight: 700; margin-bottom: 2px; }
.rank-main span { font-size: .82rem; color: rgba(255,255,255,.6); }
.rank-heat { display: flex; align-items: center; gap: 8px; }
.heat-bar { width: 90px; height: 6px; background: rgba(255,255,255,.2); border-radius: 8px; overflow: hidden; }
.heat-bar span { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-deep)); border-radius: 8px; }
.rank-heat b { font-family: var(--font-digits); font-size: 1rem; color: #fff; font-weight: 700; }

/* ===== Process Section ===== */
.process-section { padding: var(--space-section) 0; }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; margin-top: 38px; }
.process-item { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 30px 20px 24px; text-align: center; box-shadow: var(--shadow-sm); transition: all .3s ease; }
.process-item:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.process-item::after { content: ""; position: absolute; top: 32px; right: -14px; width: 24px; height: 24px; border-top: 2px dashed var(--accent); border-right: 2px dashed var(--accent); transform: rotate(45deg); opacity: .35; }
.process-item:last-child::after { display: none; }
.process-icon { width: 60px; height: 60px; border-radius: 18px; background: var(--accent-soft); color: var(--accent-deep); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; margin: 0 auto 16px; }
.process-item h4 { font-size: 1.02rem; color: var(--primary); font-weight: 800; margin-bottom: 6px; }
.process-item p { font-size: .86rem; color: var(--text-muted); }

/* ===== FAQ Section ===== */
.faq-section { padding: var(--space-section) 0 90px; }
.faq-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 40px; margin-top: 36px; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 22px 24px; transition: box-shadow .25s ease; }
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-item h4 { font-size: 1rem; color: var(--primary); font-weight: 700; margin-bottom: 8px; display: flex; align-items: flex-start; gap: 10px; }
.faq-item h4 i { color: var(--accent-deep); margin-top: 3px; }
.faq-item p { font-size: .9rem; color: var(--text-muted); padding-left: 28px; }

/* ===== CTA Section ===== */
.cta-section { padding: 0 0 var(--space-section); }
.cta-box {
  position: relative; background: linear-gradient(120deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-lg); padding: 52px 48px; overflow: hidden; color: #fff;
  display: flex; align-items: center; justify-content: space-between; gap: 26px; flex-wrap: wrap;
  box-shadow: var(--shadow-lg);
}
.cta-box::after { content: ""; position: absolute; left: -40px; bottom: -60px; width: 200px; height: 200px; border: 30px solid rgba(255,255,255,.06); border-radius: 50%; }
.cta-box::before { content: ""; position: absolute; right: 10%; top: -80px; width: 180px; height: 180px; border-radius: 50%; background: radial-gradient(circle, rgba(255,176,58,.25), transparent 70%); }
.cta-text { position: relative; z-index: 1; flex: 1; min-width: 260px; }
.cta-text h2 { font-size: 1.7rem; font-weight: 900; margin-bottom: 8px; }
.cta-text p { opacity: .82; font-size: .96rem; max-width: 500px; }
.cta-actions { position: relative; z-index: 2; display: flex; gap: 14px; flex-wrap: wrap; }

/* ===== Footer ===== */
.site-footer { background: var(--primary-deep); color: rgba(255,255,255,.82); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.8fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-brand .footer-logo { font-size: 1.45rem; font-weight: 900; color: #fff; display: block; margin-bottom: 14px; }
.footer-brand p { font-size: .9rem; line-height: 1.8; opacity: .78; max-width: 320px; }
.footer-col h4 { color: #fff; font-size: .98rem; font-weight: 700; margin-bottom: 16px; }
.footer-col a { display: block; font-size: .9rem; color: rgba(255,255,255,.68); padding: 4px 0; transition: color .2s ease, padding-left .2s ease; }
.footer-col a:hover { color: var(--accent); padding-left: 5px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 20px 0; text-align: center; font-size: .85rem; color: rgba(255,255,255,.55); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  :root { --space-section: 64px; }
  .container { padding: 0 20px; }
  .header-inner { flex-wrap: wrap; height: auto; padding: 14px 0; gap: 12px; }
  .logo { order: 1; }
  .nav-cta { order: 2; }
  .nav-toggle { order: 3; display: flex; }
  .main-nav {
    order: 4; width: 100%; flex-direction: column; align-items: stretch; gap: 8px;
    background: transparent; padding: 0; border-radius: 0; max-height: 0; overflow: hidden;
    transition: max-height .4s ease, padding .3s ease;
  }
  .main-nav.open { max-height: 340px; padding: 6px 0 2px; }
  .nav-link { text-align: center; padding: 12px 16px; }
  .nav-link.active { background: var(--primary); color: #fff; box-shadow: none; }
  .events-grid { grid-template-columns: 1fr 1fr; gap: 18px; }
  .process-grid { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .process-item::after { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
}
@media (max-width: 768px) {
  .events-grid { grid-template-columns: 1fr; }
  .ranking-grid { grid-template-columns: 1fr; }
  .faq-wrap { grid-template-columns: 1fr; gap: 14px; }
  .hero-actions .btn { padding: 10px 18px; font-size: .9rem; }
  .cta-box { padding: 34px 26px; }
  .process-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  :root { --space-section: 48px; }
  .container { padding: 0 16px; }
  .header-inner { flex-wrap: nowrap; }
  .nav-cta { display: none; }
  .logo { font-size: 1.2rem; }
  .page-hero { padding: 46px 0 42px; }
  .hero-title { font-size: 1.8rem; }
  .process-grid { grid-template-columns: 1fr; }
  .ranking-grid { grid-template-columns: 1fr; }
  .chip-head { flex-direction: column; align-items: flex-start; }
  .chip-list { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 8px; -webkit-overflow-scrolling: touch; }
  .filter-chip { flex: 0 0 auto; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; padding-bottom: 24px; }
  .cta-section .btn { width: 100%; }
}

/* ===== Reveal Animation ===== */
@keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
.animate-up { animation: fadeUp .65s ease both; }
.animate-up.d1 { animation-delay: .1s; }
.animate-up.d2 { animation-delay: .2s; }

/* ===== Focus Accessibility ===== */
a:focus-visible, button:focus-visible, .filter-chip:focus-visible { outline: 3px solid rgba(255,176,58,.65); outline-offset: 2px; }

/* roulang page: category2 */
:root {
  --primary: #1a3a6b;
  --primary-dark: #10244a;
  --primary-light: #2a5aa0;
  --accent: #e8a33d;
  --accent-hover: #d4912a;
  --accent-light: #fff3e0;
  --bg: #f5f7fb;
  --bg-white: #ffffff;
  --bg-deep: #0d1b30;
  --bg-dark: #0e1c33;
  --text: #1f2a3d;
  --text-weak: #6b7a90;
  --text-light: rgba(255,255,255,0.72);
  --border: #e3e8f0;
  --border-dark: rgba(255,255,255,0.12);
  --radius: 18px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow: 0 10px 30px rgba(15, 35, 65, 0.08);
  --shadow-lg: 0 18px 44px rgba(15, 35, 65, 0.14);
  --transition: all 0.25s ease;
  --space: 24px;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}
img {
  max-width: 100%;
  display: block;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
ul, ol {
  list-style: none;
}
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(232, 163, 61, 0.55);
  outline-offset: 3px;
  border-radius: 6px;
}
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.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);
  box-shadow: 0 4px 20px rgba(15, 35, 65, 0.05);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 74px;
}
.logo {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.4px;
  white-space: nowrap;
}
.logo:hover {
  color: var(--primary-light);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 10px;
}
.nav-link {
  display: inline-block;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-weak);
  white-space: nowrap;
  transition: var(--transition);
}
.nav-link:hover {
  color: var(--primary);
  background: rgba(26, 58, 107, 0.08);
}
.nav-link.active {
  color: #ffffff;
  background: var(--primary);
  box-shadow: 0 6px 16px rgba(26, 58, 107, 0.28);
}
.nav-cta {
  margin-left: auto;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-white);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  transition: var(--transition);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 26px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  transition: var(--transition);
  border: 1.5px solid transparent;
}
.btn-primary {
  background: var(--accent);
  color: #14243d;
  box-shadow: 0 8px 20px rgba(232, 163, 61, 0.3);
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(232, 163, 61, 0.38);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-outline-light {
  border-color: rgba(255, 255, 255, 0.65);
  color: #ffffff;
  background: rgba(255, 255, 255, 0.06);
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: #ffffff;
  transform: translateY(-2px);
}
.btn-ghost-light {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}
.btn-ghost-light:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}
.page-hero {
  position: relative;
  padding: 96px 0 108px;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  color: #ffffff;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(9, 22, 38, 0.94) 0%, rgba(16, 38, 66, 0.84) 60%, rgba(26, 58, 107, 0.72) 100%);
}
.page-hero .container {
  position: relative;
  z-index: 1;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-light);
  margin-bottom: 18px;
}
.breadcrumb a {
  color: var(--text-light);
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb .sep {
  opacity: 0.5;
}
.page-hero h1 {
  font-size: 44px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.8px;
  margin-bottom: 16px;
  max-width: 640px;
}
.page-hero .hero-lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-light);
  max-width: 620px;
  margin-bottom: 30px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin-top: 44px;
  padding-top: 32px;
  border-top: 1px solid var(--border-dark);
}
.hero-stat b {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}
.hero-stat span {
  font-size: 14px;
  color: var(--text-light);
}
.section {
  padding: 84px 0;
}
.section-alt {
  background: var(--bg-white);
}
.section-header {
  max-width: 680px;
  margin-bottom: 44px;
}
.section-header.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}
.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}
.section-title {
  font-size: 32px;
  line-height: 1.25;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.4px;
}
.section-subtitle {
  margin-top: 12px;
  font-size: 16px;
  color: var(--text-weak);
  line-height: 1.8;
}
.chip-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.chip-tabs-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-weak);
  margin-right: 4px;
}
.chip-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background: var(--bg-white);
  border: 1px solid var(--border);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-weak);
  transition: var(--transition);
}
.chip-tab:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}
.chip-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 6px 16px rgba(26, 58, 107, 0.22);
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.28s ease, box-shadow 0.28s ease;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.card-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--primary-dark);
}
.card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease;
}
.card:hover .card-cover img {
  transform: scale(1.05);
}
.card-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(10, 25, 45, 0.32) 100%);
}
.card-tag {
  position: absolute;
  left: 16px;
  top: 16px;
  z-index: 2;
  display: inline-block;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #ffffff;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.card-body {
  padding: 24px;
}
.card-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 10px;
}
.card-text {
  font-size: 15px;
  color: var(--text-weak);
  line-height: 1.75;
  margin-bottom: 18px;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
}
.card-link:hover {
  color: var(--accent-hover);
  gap: 10px;
}
.steps-section {
  position: relative;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  color: #ffffff;
}
.steps-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(9, 20, 38, 0.95) 0%, rgba(16, 36, 64, 0.9) 100%);
}
.steps-section .container,
.steps-section .section-header {
  position: relative;
  z-index: 1;
}
.steps-section .section-title {
  color: #ffffff;
}
.steps-section .section-subtitle {
  color: var(--text-light);
}
.steps-section .section-eyebrow {
  background: rgba(232, 163, 61, 0.16);
  color: var(--accent);
}
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  position: relative;
  z-index: 1;
}
.step-item {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: var(--transition);
}
.step-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
}
.step-num {
  width: 58px;
  height: 58px;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  background: rgba(232, 163, 61, 0.18);
  border: 1px solid rgba(232, 163, 61, 0.4);
  font-size: 22px;
  font-weight: 800;
  color: var(--accent);
}
.step-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}
.step-text {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.75;
}
.rank-section {
  background: var(--bg-white);
}
.rank-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.rank-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: var(--transition);
}
.rank-item:hover {
  border-color: var(--primary-light);
  background: #eef2f8;
  transform: translateX(4px);
}
.rank-num {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  font-size: 14px;
  font-weight: 800;
}
.rank-item:nth-child(1) .rank-num {
  background: var(--accent);
  color: #14243d;
}
.rank-info {
  flex: 1;
  min-width: 0;
}
.rank-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.rank-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 700;
  background: var(--accent-light);
  color: #b8750e;
}
.rank-bar {
  margin-top: 8px;
  height: 6px;
  border-radius: 6px;
  background: #e4e9f2;
  overflow: hidden;
}
.rank-bar span {
  display: block;
  height: 100%;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--primary-light), var(--accent));
}
.rank-score {
  flex-shrink: 0;
  font-size: 18px;
  font-weight: 800;
  color: var(--primary);
}
.tips-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.tip-card {
  padding: 30px 26px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.tip-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--accent);
  opacity: 0;
  transition: var(--transition);
}
.tip-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.tip-card:hover::before {
  opacity: 1;
}
.tip-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--accent-light);
  color: var(--accent-hover);
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 18px;
}
.tip-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}
.tip-text {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.75;
}
.faq-section {
  background: var(--bg);
}
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow 0.25s ease;
}
.faq-item:hover {
  box-shadow: var(--shadow);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: color 0.2s;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary .faq-icon {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent-hover);
  font-size: 18px;
  font-weight: 700;
  transition: transform 0.3s ease, background 0.3s ease;
}
.faq-item[open] summary {
  color: var(--primary);
}
.faq-item[open] summary .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #ffffff;
}
.faq-a {
  padding: 0 24px 22px;
  font-size: 15px;
  color: var(--text-weak);
  line-height: 1.8;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}
.cta-section {
  position: relative;
  padding: 96px 0;
  background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
  color: #ffffff;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(9, 20, 38, 0.93), rgba(16, 38, 66, 0.85));
}
.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
}
.cta-inner p {
  font-size: 17px;
  color: var(--text-light);
  margin-bottom: 32px;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}
.site-footer {
  background: var(--bg-dark);
  color: var(--text-light);
  padding: 64px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 44px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-dark);
}
.footer-logo {
  display: inline-block;
  font-size: 22px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-light);
  max-width: 320px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-light);
  padding: 5px 0;
  transition: var(--transition);
}
.footer-col a:hover {
  color: var(--accent);
  padding-left: 5px;
}
.footer-bottom {
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}
@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    min-height: 64px;
  }
  .nav-toggle {
    display: flex;
    margin-left: auto;
  }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    z-index: 99;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    margin: 0;
    padding: 16px 20px 20px;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 18px 40px rgba(15, 35, 65, 0.14);
    display: none;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
  }
  .main-nav.open {
    display: flex;
  }
  .nav-link {
    padding: 13px 16px;
    font-size: 16px;
  }
  .nav-cta {
    display: none;
  }
  .page-hero {
    padding: 72px 0 80px;
  }
  .page-hero h1 {
    font-size: 34px;
  }
  .section {
    padding: 64px 0;
  }
  .section-title {
    font-size: 26px;
  }
  .hero-stats {
    gap: 20px;
  }
  .tips-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 18px;
  }
  .grid-2,
  .grid-4,
  .steps {
    grid-template-columns: 1fr;
  }
  .page-hero h1 {
    font-size: 28px;
  }
  .page-hero .hero-lead {
    font-size: 15px;
  }
  .chip-tabs {
    gap: 8px;
  }
  .chip-tab {
    padding: 8px 14px;
    font-size: 13px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .footer-brand p {
    max-width: 100%;
  }
  .cta-inner h2 {
    font-size: 28px;
  }
}