/* roulang page: index */
:root {
  --primary: #3B82F6;
  --primary-light: #60A5FA;
  --primary-bg: #EFF6FF;
  --accent: #14B8A6;
  --accent-light: #CCFBF1;
  --amber: #F59E0B;
  --red: #EF4444;
  --ink: #0F172A;
  --body: #334155;
  --muted: #64748B;
  --faint: #94A3B8;
  --line: #E2E8F0;
  --surface: #FFFFFF;
  --bg: #F8FAFC;
  --radius-card: 16px;
  --radius-btn: 10px;
  --shadow: 0 4px 16px rgba(59, 130, 246, 0.06);
  --shadow-hover: 0 8px 32px rgba(59, 130, 246, 0.12);
  --container: 1200px;
  --space-section: 96px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--body);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: var(--space-section) 0; }
.section-sm { padding: 64px 0; }
.section-head { display: flex; flex-direction: column; gap: 8px; margin-bottom: 48px; }
.section-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 700; letter-spacing: 0.12em;
  color: var(--primary); text-transform: uppercase;
}
.section-tag::before {
  content: ""; width: 6px; height: 6px; border-radius: 2px;
  background: var(--red); display: inline-block;
}
.section-head h2 { font-size: 28px; font-weight: 700; color: var(--ink); line-height: 1.3; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  height: 76px;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand-logo { display: inline-flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: var(--ink); }
.brand-logo .mark {
  width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-size: 15px; font-weight: 900;
}
.brand-logo .sub { color: var(--primary); font-weight: 800; }
.main-nav { display: flex; align-items: center; gap: 32px; }
.main-nav a {
  font-size: 14px; font-weight: 500; color: var(--muted);
  padding: 26px 0 22px; position: relative;
  transition: color 0.2s;
}
.main-nav a:hover { color: var(--primary); }
.main-nav a.active { color: var(--ink); font-weight: 600; }
.main-nav a.active::after {
  content: ""; position: absolute; left: 50%; transform: translateX(-50%);
  bottom: 0; width: 20px; height: 2px; border-radius: 2px;
  background: var(--primary);
}
.nav-tools { display: flex; align-items: center; gap: 12px; }
.icon-btn {
  width: 38px; height: 38px; border-radius: 10px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--line); background: var(--surface);
  color: var(--muted); transition: all 0.2s;
}
.icon-btn:hover { border-color: var(--primary); color: var(--primary); }
.hamburger { display: none; }
.mobile-menu {
  display: none; flex-direction: column;
  background: var(--surface); border-bottom: 1px solid var(--line);
  padding: 16px 24px 24px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-size: 16px; font-weight: 500; color: var(--body);
  padding: 12px 0; border-bottom: 1px solid rgba(226,232,240,0.6);
}
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a.active { color: var(--primary); font-weight: 600; }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 620px;
  display: flex; align-items: center;
  background: linear-gradient(180deg, rgba(239,246,255,0.92), rgba(248,250,252,0.78));
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0.28;
}
.hero-inner { position: relative; display: flex; align-items: center; gap: 64px; padding-top: 64px; padding-bottom: 128px; flex-wrap: wrap; }
.hero-copy { flex: 1 1 520px; }
.hero-kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: 0.08em;
  color: var(--muted); background: rgba(255,255,255,0.7);
  border: 1px solid var(--line); border-radius: 999px;
  padding: 6px 16px; margin-bottom: 24px;
}
.hero-kicker .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--red); }
.hero h1 { font-size: 44px; font-weight: 800; color: var(--ink); line-height: 1.2; letter-spacing: -0.02em; max-width: 640px; }
.hero-sub { font-size: 17px; line-height: 1.7; color: var(--muted); margin-top: 20px; max-width: 560px; }
.hero-cta { display: flex; align-items: center; gap: 16px; margin-top: 36px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--primary); color: #fff;
  font-size: 16px; font-weight: 600;
  padding: 14px 32px; border-radius: var(--radius-btn);
  border: 1px solid var(--primary);
  transition: all 0.2s ease;
  box-shadow: var(--shadow);
}
.btn-primary:hover { background: #2f72f0; transform: translateY(-1px); box-shadow: var(--shadow-hover); }
.btn-primary:active { transform: translateY(0) scale(0.98); }
.btn-primary:focus-visible { outline: 3px solid rgba(59,130,246,0.3); outline-offset: 2px; }
.btn-secondary {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--surface); color: var(--primary);
  font-size: 16px; font-weight: 600;
  padding: 14px 32px; border-radius: var(--radius-btn);
  border: 1px solid var(--line);
  transition: all 0.2s ease;
}
.btn-secondary:hover { background: var(--primary-bg); border-color: var(--primary-light); }
.btn-secondary:active { transform: translateY(0) scale(0.98); }
.btn-secondary:focus-visible { outline: 3px solid rgba(59,130,246,0.25); outline-offset: 2px; }
.hero-panel {
  flex: 0 1 360px;
  background: var(--ink);
  border-radius: 20px;
  padding: 32px;
  color: #E2E8F0;
  position: relative;
  box-shadow: 0 24px 48px rgba(15,23,42,0.18);
}
.hero-panel::before {
  content: ""; position: absolute; top: 0; right: 0;
  width: 72px; height: 72px;
  background: repeating-linear-gradient(135deg, rgba(255,255,255,0.05) 0 6px, transparent 6px 12px);
  border-radius: 0 20px 0 0;
}
.panel-title { font-size: 13px; font-weight: 700; letter-spacing: 0.1em; color: var(--faint); text-transform: uppercase; display: flex; align-items: center; gap: 8px; }
.panel-title .status-dot { width: 8px; height: 8px; border-radius: 50%; background: #10B981; box-shadow: 0 0 0 4px rgba(16,185,129,0.15); }
.panel-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 24px; }
.panel-item .num { font-size: 28px; font-weight: 800; color: #fff; font-variant-numeric: tabular-nums; }
.panel-item .label { font-size: 13px; color: var(--faint); margin-top: 4px; }
.panel-item.highlight .num { color: var(--accent); }
.panel-footer {
  margin-top: 24px; padding-top: 16px; border-top: 1px solid rgba(148,163,184,0.2);
  font-size: 12px; color: var(--faint);
  display: flex; align-items: center; gap: 8px;
}
.panel-footer .red-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--red); }
.scroll-indicator {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--line); background: rgba(255,255,255,0.8);
  display: flex; align-items: center; justify-content: center;
  color: var(--muted); font-size: 14px;
  transition: all 0.2s;
}
.scroll-indicator:hover { color: var(--primary); border-color: var(--primary); }

/* ---------- Pill Nav ---------- */
.pill-nav { display: flex; flex-wrap: wrap; gap: 14px; padding: 4px 0 8px; }
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 999px; padding: 10px 20px;
  font-size: 14px; font-weight: 500; color: var(--muted);
  transition: all 0.2s ease;
}
.pill .badge {
  background: var(--primary-bg); color: var(--primary);
  font-size: 12px; font-weight: 700; border-radius: 999px;
  padding: 1px 8px; font-variant-numeric: tabular-nums;
}
.pill:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow); }
.pill.active { border-color: var(--primary); color: var(--primary); background: var(--primary-bg); }
.pill .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--red); }

/* ---------- Feature Cards ---------- */
.feature-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 24px; }
.feature-card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius-card); overflow: hidden;
  transition: box-shadow 0.25s, border-color 0.25s, transform 0.25s;
  position: relative;
}
.feature-card:hover { box-shadow: var(--shadow-hover); border-color: var(--primary-light); transform: translateY(-4px); }
.feature-card.large .card-media { height: 320px; }
.feature-card.small .card-media { height: 150px; }
.card-media { position: relative; overflow: hidden; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.feature-card:hover .card-media img { transform: scale(1.03); }
.card-media::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(15,23,42,0.15));
}
.card-cat {
  position: absolute; top: 14px; left: 14px; z-index: 2;
  background: rgba(255,255,255,0.92); border-radius: 999px;
  font-size: 12px; font-weight: 600; color: var(--primary);
  padding: 4px 14px; display: inline-flex; align-items: center; gap: 6px;
}
.card-cat .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--accent); }
.card-body { padding: 20px 24px 24px; }
.feature-card.large .card-body { padding: 26px 28px 28px; }
.card-body h3 { font-size: 20px; font-weight: 700; color: var(--ink); line-height: 1.4; }
.feature-card.small .card-body h3 { font-size: 16px; }
.card-body p { font-size: 14px; color: var(--muted); margin-top: 10px; line-height: 1.65; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-meta { display: flex; align-items: center; gap: 14px; margin-top: 16px; font-size: 12px; color: var(--faint); }
.card-meta .tag {
  border: 1px solid var(--line); border-radius: 999px;
  padding: 2px 10px; font-size: 12px; color: var(--muted);
}

/* ---------- News list ---------- */
.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-item {
  display: flex; align-items: center; gap: 20px;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius-card); padding: 16px 20px;
  transition: box-shadow 0.2s, border-color 0.2s, transform 0.2s;
  position: relative; overflow: hidden;
}
.news-item::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0;
  width: 2px; background: var(--primary); opacity: 0;
  transition: opacity 0.2s;
}
.news-item:hover { box-shadow: var(--shadow-hover); border-color: var(--primary-light); transform: translateX(4px); }
.news-item:hover::before { opacity: 1; }
.news-thumb { width: 120px; height: 84px; flex-shrink: 0; border-radius: 10px; overflow: hidden; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-content { flex: 1; min-width: 0; }
.news-content h3 { font-size: 16px; font-weight: 600; color: var(--ink); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; transition: color 0.2s; }
.news-item:hover .news-content h3 { color: var(--primary); }
.news-content p {
  font-size: 14px; color: var(--muted); margin-top: 4px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.news-meta { display: flex; align-items: center; gap: 14px; margin-top: 10px; font-size: 12px; color: var(--faint); }
.news-meta .cat-pill {
  border: 1px solid var(--accent-light); background: var(--accent-light);
  color: #0F766E; border-radius: 999px; padding: 1px 10px;
  font-size: 12px; font-weight: 500;
}
.news-empty {
  background: var(--surface); border: 1px dashed var(--line);
  border-radius: var(--radius-card); padding: 48px; text-align: center;
  color: var(--faint); font-size: 15px;
}
.news-empty .icon { font-size: 32px; margin-bottom: 12px; opacity: 0.5; }

/* ---------- Dark data panel ---------- */
.data-section {
  background: var(--ink); color: #E2E8F0;
  position: relative; overflow: hidden;
}
.data-section::before {
  content: ""; position: absolute; top: 0; right: 0;
  width: 240px; height: 240px;
  background: repeating-linear-gradient(135deg, rgba(255,255,255,0.03) 0 8px, transparent 8px 16px);
}
.data-section::after {
  content: ""; position: absolute; bottom: 0; left: 0;
  width: 180px; height: 180px;
  background: radial-gradient(circle, rgba(59,130,246,0.15), transparent 70%);
}
.data-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; position: relative; z-index: 1; }
.data-item .dt-label { font-size: 13px; color: var(--faint); display: flex; align-items: center; gap: 8px; }
.data-item .dt-label .red-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--red); }
.data-item .dt-num { font-size: 36px; font-weight: 800; color: #fff; margin-top: 10px; font-variant-numeric: tabular-nums; }
.data-item .dt-num span { font-size: 18px; font-weight: 600; color: var(--primary-light); margin-left: 4px; }
.data-item .dt-desc { font-size: 13px; color: var(--faint); margin-top: 6px; }
.data-section .section-tag { color: var(--accent); }
.data-section .section-head h2 { color: #fff; }

/* ---------- Small recommend cards ---------- */
.reco-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.reco-card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 14px; overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s, border-color 0.2s;
}
.reco-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); border-color: var(--primary-light); }
.reco-media { height: 140px; position: relative; overflow: hidden; }
.reco-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s; }
.reco-card:hover .reco-media img { transform: scale(1.05); }
.reco-media .reco-tag {
  position: absolute; top: 10px; left: 10px;
  background: rgba(255,255,255,0.92); border-radius: 999px;
  font-size: 11px; font-weight: 600; color: var(--muted);
  padding: 2px 10px;
}
.reco-body { padding: 16px 18px 18px; }
.reco-body h4 { font-size: 15px; font-weight: 600; color: var(--ink); line-height: 1.4; }
.reco-body .reco-meta { font-size: 12px; color: var(--faint); margin-top: 8px; }

/* ---------- CTA ---------- */
.cta-wrap {
  background: var(--primary-bg); border-radius: 24px;
  padding: 56px 48px; text-align: center;
  border: 1px solid rgba(59,130,246,0.15);
  position: relative; overflow: hidden;
}
.cta-wrap::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--amber));
}
.cta-wrap h2 { font-size: 26px; font-weight: 700; color: var(--ink); }
.cta-wrap p { font-size: 14px; color: var(--muted); margin-top: 10px; }
.cta-btns { display: flex; justify-content: center; align-items: center; gap: 14px; margin-top: 28px; flex-wrap: wrap; }
.btn-amber {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--amber); color: #fff;
  font-size: 15px; font-weight: 600; padding: 12px 28px;
  border-radius: var(--radius-btn); border: 1px solid var(--amber);
  transition: all 0.2s;
}
.btn-amber:hover { filter: brightness(1.05); box-shadow: 0 8px 24px rgba(245,158,11,0.3); transform: translateY(-2px); }
.btn-share {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--surface); color: var(--primary);
  font-size: 14px; font-weight: 500; padding: 10px 20px;
  border-radius: var(--radius-btn); border: 1px solid var(--line);
  transition: all 0.2s;
}
.btn-share:hover { background: var(--primary-bg); border-color: var(--primary-light); transform: translateY(-2px); }
.share-icons { display: flex; gap: 12px; margin-top: 24px; justify-content: center; }
.share-icon {
  width: 40px; height: 40px; border-radius: 12px;
  border: 1px solid var(--line); background: var(--surface);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--muted); font-size: 16px;
  transition: all 0.2s;
}
.share-icon:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  list-style: none; cursor: pointer;
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 4px; font-size: 16px; font-weight: 600; color: var(--ink);
  transition: color 0.2s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--primary); }
.faq-item summary .faq-icon {
  width: 28px; height: 28px; border-radius: 50%; flex-shrink: 0;
  background: var(--accent-light); color: #0F766E;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 700; transition: transform 0.25s;
}
.faq-item[open] summary { color: var(--primary); }
.faq-item[open] summary .faq-icon { transform: rotate(45deg); background: var(--accent); color: #fff; }
.faq-answer { padding: 0 24px 24px; font-size: 14px; line-height: 1.7; color: var(--muted); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: var(--surface); padding: 64px 0 28px; }
.footer-grid { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.footer-brand { max-width: 340px; }
.footer-brand p { font-size: 14px; color: var(--muted); margin-top: 14px; line-height: 1.7; }
.footer-links h4 { font-size: 14px; font-weight: 700; color: var(--ink); margin-bottom: 16px; }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 14px; color: var(--muted); transition: color 0.2s; }
.footer-links a:hover { color: var(--primary); }
.footer-bottom {
  margin-top: 48px; padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; color: var(--faint);
}
.back-top {
  width: 36px; height: 36px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--surface);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--muted); transition: all 0.2s;
}
.back-top:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .feature-card.large { grid-column: 1 / -1; }
  .feature-card.large .card-media { height: 280px; }
  .reco-grid { grid-template-columns: repeat(2, 1fr); }
  .data-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .hero-panel { flex: 1 1 100%; }
  .hero h1 { font-size: 36px; }
}
@media (max-width: 768px) {
  :root { --space-section: 64px; }
  .main-nav { display: none; }
  .hamburger { display: inline-flex; }
  .hero { min-height: auto; padding: 48px 0; }
  .hero h1 { font-size: 32px; }
  .hero-sub { font-size: 15px; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .btn-primary, .btn-secondary { width: 100%; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card.large .card-media { height: 220px; }
  .news-item { flex-direction: column; align-items: flex-start; }
  .news-thumb { width: 100%; height: 160px; }
  .reco-grid { grid-template-columns: 1fr; }
  .data-grid { grid-template-columns: 1fr 1fr; }
  .cta-wrap { padding: 40px 24px; }
  .footer-grid { flex-direction: column; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; align-items: flex-start; }
  .pill-nav { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 12px; -webkit-overflow-scrolling: touch; }
  .pill { flex-shrink: 0; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 28px; }
  .section-head h2 { font-size: 24px; }
  .data-grid { grid-template-columns: 1fr; }
  .hero-panel { padding: 24px; }
  .panel-grid { grid-template-columns: 1fr 1fr; }
}

/* roulang page: category1 */
:root {
    --primary: #3B82F6;
    --primary-light: #60A5FA;
    --primary-soft: #EFF6FF;
    --accent: #14B8A6;
    --accent-soft: #F0FDFA;
    --warning: #F59E0B;
    --bg: #F8FAFC;
    --card-bg: #FFFFFF;
    --border: #E2E8F0;
    --title: #0F172A;
    --body: #334155;
    --muted: #64748B;
    --muted-2: #94A3B8;
    --radius-card: 16px;
    --radius-btn: 10px;
    --radius-pill: 999px;
    --shadow-sm: 0 4px 16px rgba(59,130,246,0.06);
    --shadow-md: 0 8px 32px rgba(59,130,246,0.12);
    --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: var(--font-stack);
    background: var(--bg);
    color: var(--body);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }

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

  a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
  }

  button {
    font-family: inherit;
    cursor: pointer;
  }

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

  /* ---------- Header / Nav ---------- */
  .site-header {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
  }

  .brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 20px;
    color: var(--title);
    line-height: 1.2;
  }

  .brand-logo .mark {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--primary);
    color: #fff;
    font-size: 18px;
    font-weight: 800;
    flex-shrink: 0;
  }

  .brand-logo .sub {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--muted-2);
    letter-spacing: 0.08em;
    line-height: 1.2;
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: 32px;
  }

  .main-nav a {
    font-size: 14px;
    font-weight: 500;
    color: var(--muted);
    padding: 8px 2px;
    position: relative;
  }

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

  .main-nav a.active {
    color: var(--primary);
  }

  .main-nav a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
  }

  .nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: transparent;
    align-items: center;
    justify-content: center;
    color: var(--muted);
  }

  .nav-toggle:hover {
    color: var(--primary);
    border-color: var(--primary);
  }

  /* ---------- Page Hero ---------- */
  .page-hero {
    background: linear-gradient(180deg, rgba(239,246,255,0.92), rgba(248,250,252,0.75)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    padding: 88px 0 80px;
    border-bottom: 1px solid var(--border);
  }

  .page-hero .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border-radius: var(--radius-pill);
    background: rgba(255,255,255,0.8);
    border: 1px solid var(--border);
    font-size: 13px;
    color: var(--primary);
    font-weight: 600;
  }

  /* ---------- Buttons ---------- */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--primary);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    padding: 14px 32px;
    border-radius: var(--radius-btn);
    border: none;
    transition: all 0.2s ease;
  }

  .btn-primary:hover {
    background: rgba(59,130,246,0.9);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
  }

  .btn-primary:active {
    transform: translateY(0) scale(0.98);
  }

  .btn-primary:focus-visible {
    outline: 3px solid rgba(59,130,246,0.3);
    outline-offset: 2px;
  }

  .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: #fff;
    color: var(--primary);
    font-size: 16px;
    font-weight: 600;
    padding: 13px 30px;
    border-radius: var(--radius-btn);
    border: 1px solid var(--border);
    transition: all 0.2s ease;
  }

  .btn-secondary:hover {
    background: var(--primary-soft);
    border-color: var(--primary-light);
  }

  .btn-secondary:focus-visible {
    outline: 3px solid rgba(59,130,246,0.3);
    outline-offset: 2px;
  }

  .btn-sm {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    font-size: 14px;
    border-radius: 8px;
  }

  /* ---------- Cards ---------- */
  .guide-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    overflow: hidden;
    transition: box-shadow 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
  }

  .guide-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
    transform: translateY(-2px);
  }

  .guide-card .card-cover {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background: var(--primary-soft);
  }

  .guide-card .card-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 10px;
  }

  .guide-card .card-tag {
    align-self: flex-start;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 12px;
    font-weight: 600;
  }

  .guide-card .card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--title);
    line-height: 1.5;
  }

  .guide-card .card-title a:hover {
    color: var(--primary);
  }

  .guide-card .card-desc {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .guide-card .card-meta {
    margin-top: auto;
    padding-top: 12px;
    border-top: 1px solid #F1F5F9;
    font-size: 12px;
    color: var(--muted-2);
    display: flex;
    align-items: center;
    gap: 12px;
  }

  /* ---------- Sticky Sidebar ---------- */
  .side-sticky {
    position: sticky;
    top: 104px;
  }

  .side-panel {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 32px 28px;
  }

  .scene-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px 0;
    font-size: 14px;
    color: var(--muted);
  }

  .scene-list li .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    margin-top: 9px;
    flex-shrink: 0;
  }

  /* ---------- Feature / Scene Cards ---------- */
  .scene-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: 32px 24px;
    transition: box-shadow 0.25s ease, transform 0.25s ease;
  }

  .scene-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
  }

  .scene-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
  }

  /* ---------- Process Steps ---------- */
  .step-item {
    position: relative;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: 32px 24px;
  }

  .step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    font-size: 16px;
    margin-bottom: 16px;
  }

  /* ---------- Horizontal List Card ---------- */
  .h-list-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: 16px;
    transition: box-shadow 0.25s ease, border-color 0.25s ease;
  }

  .h-list-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
  }

  .h-list-card .thumb {
    width: 120px;
    height: 84px;
    object-fit: cover;
    border-radius: 10px;
    flex-shrink: 0;
    background: var(--primary-soft);
  }

  .h-list-card .info {
    flex: 1;
    min-width: 0;
  }

  .h-list-card .info h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--title);
    line-height: 1.4;
  }

  .h-list-card .info h3 a:hover {
    color: var(--primary);
  }

  .h-list-card .info p {
    font-size: 14px;
    color: var(--muted);
    margin-top: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .h-list-card .info .meta {
    font-size: 12px;
    color: var(--muted-2);
    margin-top: 6px;
  }

  /* ---------- FAQ ---------- */
  .faq-item {
    border-bottom: 1px solid var(--border);
  }

  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--title);
    background: transparent;
    border: none;
    width: 100%;
    text-align: left;
    transition: color 0.2s ease;
  }

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

  .faq-item.open .faq-question {
    color: var(--primary);
  }

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

  .faq-answer {
    display: none;
    padding: 0 44px 20px 0;
    font-size: 14px;
    color: var(--muted);
    line-height: 1.7;
  }

  .faq-item.open .faq-answer {
    display: block;
  }

  /* ---------- CTA ---------- */
  .cta-box {
    background: var(--primary-soft);
    border-radius: 24px;
    padding: 48px 32px;
  }

  /* ---------- Footer ---------- */
  .site-footer {
    background: #fff;
    border-top: 1px solid var(--border);
    padding: 64px 0 24px;
    margin-top: 96px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 0.9fr 0.9fr;
    gap: 48px;
  }

  .footer-grid h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--title);
    margin-bottom: 16px;
  }

  .footer-grid ul {
    list-style: none;
  }

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

  .footer-grid ul a {
    font-size: 14px;
    color: var(--muted);
  }

  .footer-grid ul a:hover {
    color: var(--primary);
  }

  .footer-brand p {
    font-size: 14px;
    color: var(--muted);
    margin-top: 12px;
    max-width: 360px;
  }

  .footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 32px;
    margin-top: 48px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--muted-2);
  }

  .back-top {
    width: 32px;
    height: 32px;
    border-radius: 10px;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--muted);
    transition: all 0.2s ease;
  }

  .back-top:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--primary-soft);
  }

  /* ---------- Responsive ---------- */
  @media (max-width: 1024px) {
    .footer-grid {
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    .main-nav {
      gap: 20px;
    }
  }

  @media (max-width: 768px) {
    .site-header {
      backdrop-filter: none;
    }

    .nav-toggle {
      display: flex;
    }

    .main-nav {
      display: none;
      position: absolute;
      top: 76px;
      left: 0;
      right: 0;
      background: #fff;
      border-bottom: 1px solid var(--border);
      flex-direction: column;
      align-items: flex-start;
      gap: 0;
      padding: 8px 24px 16px;
    }

    .main-nav.open {
      display: flex;
      box-shadow: 0 16px 32px rgba(15,23,42,0.08);
    }

    .main-nav a {
      display: block;
      width: 100%;
      padding: 12px 0;
      border-bottom: 1px solid #F1F5F9;
      font-size: 16px;
    }

    .main-nav a.active::after {
      display: none;
    }

    .main-nav a.active {
      color: var(--primary);
    }

    .page-hero {
      padding: 56px 0;
    }

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

    .footer-bottom {
      flex-direction: column;
      gap: 16px;
      text-align: center;
    }
  }

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

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

    .brand-logo .mark {
      width: 32px;
      height: 32px;
      font-size: 16px;
    }

    .cta-box {
      padding: 32px 20px;
    }
  }

/* roulang page: article */
:root {
            --primary: #3B82F6;
            --primary-light: #60A5FA;
            --accent: #14B8A6;
            --amber: #F59E0B;
            --bg: #F8FAFC;
            --card: #FFFFFF;
            --heading: #0F172A;
            --body: #334155;
            --muted: #64748B;
            --faint: #94A3B8;
            --border: #E2E8F0;
            --radius-card: 16px;
            --radius-btn: 10px;
            --shadow-default: 0 4px 16px rgba(59, 130, 246, 0.06);
            --shadow-hover: 0 8px 32px rgba(59, 130, 246, 0.12);
            --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            background-color: var(--bg);
            color: var(--body);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            font-variant-numeric: tabular-nums;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }
        img {
            max-width: 100%;
            display: block;
        }
        h1,
        h2,
        h3,
        h4 {
            color: var(--heading);
            line-height: 1.3;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ---------- Header / Nav ---------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, .96);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            height: 76px;
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            width: 100%;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 800;
            color: var(--heading);
            letter-spacing: -.2px;
            white-space: nowrap;
        }
        .brand-logo .mark {
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .brand-logo .sub {
            font-size: 12px;
            font-weight: 500;
            color: var(--faint);
            margin-left: 2px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 40px;
            margin-left: auto;
        }
        .main-nav a {
            font-size: 14px;
            color: #475569;
            font-weight: 500;
            position: relative;
            padding: 8px 2px;
            white-space: nowrap;
        }
        .main-nav a:hover {
            color: var(--primary);
        }
        .main-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--heading);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: background .2s ease;
        }
        .nav-toggle:hover {
            background: #f1f5f9;
        }
        .mobile-nav {
            display: none;
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 12px 24px;
        }
        .mobile-nav a {
            display: block;
            padding: 13px 0;
            font-size: 16px;
            color: var(--body);
            border-bottom: 1px solid #f1f5f9;
            line-height: 1.5;
            font-weight: 500;
        }
        .mobile-nav a:last-child {
            border-bottom: none;
        }
        .mobile-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .mobile-nav.open {
            display: block;
        }

        /* ---------- Breadcrumb ---------- */
        .breadcrumb {
            padding: 28px 0 8px;
            font-size: 13px;
            color: var(--faint);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            margin: 0 10px;
            color: #CBD5E1;
        }
        .breadcrumb .current {
            color: var(--muted);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            display: inline-block;
            max-width: 240px;
            vertical-align: bottom;
        }

        /* ---------- Article ---------- */
        .article-layout {
            padding: 16px 0 80px;
        }
        .article-container {
            max-width: 760px;
            margin: 0 auto;
        }
        .article-header {
            margin-bottom: 28px;
        }
        .article-header h1 {
            font-size: 34px;
            font-weight: 800;
            color: var(--heading);
            line-height: 1.35;
            margin-bottom: 16px;
            letter-spacing: -.4px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
            color: var(--muted);
            border-bottom: 1px solid var(--border);
            padding-bottom: 20px;
        }
        .article-meta i {
            margin-right: 6px;
            color: var(--faint);
        }
        .article-meta .badge {
            display: inline-flex;
            align-items: center;
            padding: 2px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(20, 184, 166, .1);
            color: #0F766E;
            border: 1px solid rgba(20, 184, 166, .3);
        }
        .article-status-bar {
            display: flex;
            align-items: center;
            gap: 10px;
            background: #0F172A;
            color: #E2E8F0;
            border-radius: 8px;
            padding: 8px 16px;
            font-size: 12px;
            margin-bottom: 28px;
            letter-spacing: .3px;
        }
        .article-status-bar .dot {
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            display: inline-block;
            animation: pulse 1.8s infinite;
        }
        @keyframes pulse {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: .5;
                transform: scale(.8);
            }
        }
        .article-status-bar .text {
            text-transform: uppercase;
            font-weight: 600;
            letter-spacing: 1px;
        }

        /* ---------- Article Content ---------- */
        .article-content {
            font-size: 16px;
            line-height: 1.85;
            color: var(--body);
        }
        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            margin-top: 36px;
            margin-bottom: 16px;
            color: var(--heading);
        }
        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            margin-top: 28px;
            margin-bottom: 12px;
            color: var(--heading);
        }
        .article-content p {
            margin-bottom: 24px;
        }
        .article-content a {
            color: var(--primary);
            font-weight: 500;
        }
        .article-content a:hover {
            text-decoration: underline;
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: #EFF6FF;
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
            color: var(--muted);
            font-size: 15px;
        }
        .article-content img {
            border-radius: 12px;
            margin: 24px 0;
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .article-content figure {
            margin: 24px 0;
        }
        .article-content figcaption {
            font-size: 13px;
            color: var(--faint);
            text-align: center;
            margin-top: -12px;
            margin-bottom: 24px;
            line-height: 1.5;
        }
        .article-content ul,
        .article-content ol {
            margin: 0 0 24px 1.4em;
            padding: 0;
        }
        .article-content li {
            margin-bottom: 8px;
            line-height: 1.7;
        }
        .article-content code {
            background: #f1f5f9;
            border-radius: 4px;
            padding: 2px 8px;
            font-size: 14px;
            color: var(--primary);
            font-family: SFMono-Regular, Menlo, Consolas, monospace;
        }
        .article-content pre {
            background: #0F172A;
            color: #E2E8F0;
            border-radius: 12px;
            padding: 20px;
            overflow-x: auto;
            margin: 24px 0;
            font-size: 14px;
            line-height: 1.7;
        }
        .article-content pre code {
            background: transparent;
            color: inherit;
            padding: 0;
            font-size: inherit;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
        }
        .article-content th,
        .article-content td {
            border: 1px solid var(--border);
            padding: 12px 16px;
            text-align: left;
        }
        .article-content th {
            background: #F8FAFC;
            font-weight: 600;
            color: var(--heading);
        }
        .article-content hr {
            border: none;
            border-top: 1px solid var(--border);
            margin: 32px 0;
        }

        /* ---------- Article Tags ---------- */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            padding: 28px 0;
            border-bottom: 1px solid var(--border);
        }
        .article-tags .tag {
            display: inline-flex;
            padding: 4px 14px;
            border-radius: 999px;
            border: 1px solid var(--border);
            font-size: 13px;
            color: var(--muted);
            background: #fff;
            transition: all .2s ease;
        }
        .article-tags .tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: #F0F7FF;
        }

        /* ---------- Adjacent Posts ---------- */
        .adjacent-posts {
            display: flex;
            justify-content: space-between;
            gap: 24px;
            padding: 24px 0;
            border-bottom: 1px solid var(--border);
        }
        .adjacent-posts a {
            font-size: 14px;
            color: var(--muted);
            max-width: 48%;
            transition: color .2s ease;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 14px 18px;
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
        }
        .adjacent-posts a:hover {
            color: var(--primary);
            border-color: var(--primary-light);
            box-shadow: var(--shadow-default);
        }
        .adjacent-posts .label {
            display: block;
            font-size: 12px;
            color: var(--faint);
            text-transform: uppercase;
            letter-spacing: .5px;
            font-weight: 600;
        }
        .adjacent-posts .text {
            font-weight: 500;
            font-size: 14px;
            line-height: 1.5;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ---------- Related ---------- */
        .related-section {
            padding: 64px 0 40px;
        }
        .related-section h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 32px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-section h2::before {
            content: '';
            width: 4px;
            height: 22px;
            background: var(--primary);
            border-radius: 2px;
            display: inline-block;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-default);
            transition: all .3s ease;
            position: relative;
            display: block;
        }
        .related-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: var(--primary-light);
        }
        .related-card .card-topline {
            height: 2px;
            background: var(--primary);
            position: absolute;
            top: 0;
            left: 0;
            width: 0;
            transition: width .3s ease;
        }
        .related-card:hover .card-topline {
            width: 100%;
        }
        .related-card img {
            width: 100%;
            height: 170px;
            object-fit: cover;
        }
        .related-card .card-body {
            padding: 20px;
        }
        .related-card .card-index {
            font-size: 12px;
            font-weight: 700;
            color: var(--faint);
            letter-spacing: 1px;
            display: block;
            margin-bottom: 8px;
        }
        .related-card .card-body h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.5;
            color: var(--heading);
        }
        .related-card .card-body p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.6;
            margin: 0;
        }

        /* ---------- Back Link ---------- */
        .back-link-wrap {
            text-align: center;
            padding: 32px 0 72px;
        }
        .back-link-wrap a {
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: 10px;
            transition: all .2s ease;
            background: transparent;
        }
        .back-link-wrap a:hover {
            background: #EFF6FF;
            color: #2563EB;
        }

        /* ---------- Not Found ---------- */
        .not-found {
            text-align: center;
            padding: 80px 24px;
            min-height: 50vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        .not-found .icon {
            font-size: 52px;
            color: var(--faint);
            margin-bottom: 16px;
            width: 96px;
            height: 96px;
            border-radius: 50%;
            background: #fff;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-default);
        }
        .not-found h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--heading);
        }
        .not-found p {
            color: var(--muted);
            margin-bottom: 28px;
            max-width: 360px;
            font-size: 15px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            transition: all .25s ease;
            box-shadow: var(--shadow-default);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            background: #2f74e8;
            box-shadow: var(--shadow-hover);
            transform: translateY(-1px);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0) scale(.98);
        }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(59, 130, 246, .3);
            outline-offset: 2px;
        }

        /* ---------- Footer ---------- */
        .site-footer {
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 56px 0 24px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }
        .footer-brand .brand-logo {
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--muted);
            max-width: 360px;
        }
        .footer-links h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--heading);
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--muted);
            transition: color .2s ease;
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid #f1f5f9;
            padding-top: 24px;
            font-size: 12px;
            color: var(--faint);
        }
        .back-top {
            width: 36px;
            height: 36px;
            border: 1px solid var(--border);
            border-radius: 999px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--muted);
            transition: all .2s ease;
            background: #fff;
        }
        .back-top:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: #F0F7FF;
        }

        /* ---------- Responsive ---------- */
        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .mobile-nav.open {
                display: block;
            }
            .container {
                padding: 0 16px;
            }
            .article-header h1 {
                font-size: 26px;
            }
            .article-meta {
                gap: 10px 14px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .adjacent-posts {
                flex-direction: column;
                gap: 12px;
            }
            .adjacent-posts a {
                max-width: 100%;
            }
            .site-header {
                height: 64px;
            }
            .brand-logo {
                font-size: 18px;
            }
            .brand-logo .mark {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }
            .article-layout {
                padding: 8px 0 48px;
            }
            .related-section {
                padding: 48px 0 24px;
            }
        }
        @media (max-width: 520px) {
            .article-header h1 {
                font-size: 23px;
            }
            .article-content {
                font-size: 15px;
            }
            .article-content blockquote {
                padding: 14px 16px;
                font-size: 14px;
            }
            .article-tags {
                gap: 6px;
            }
            .article-tags .tag {
                font-size: 12px;
                padding: 3px 12px;
            }
            .related-card img {
                height: 140px;
            }
            .not-found {
                padding: 48px 16px;
            }
            .not-found .icon {
                width: 72px;
                height: 72px;
                font-size: 36px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #3B82F6;
            --primary-light: #60A5FA;
            --accent: #14B8A6;
            --accent-soft: rgba(20, 184, 166, 0.15);
            --amber2: #F59E0B;
            --bg: #F8FAFC;
            --card-bg: #FFFFFF;
            --heading: #0F172A;
            --body: #334155;
            --muted: #64748B;
            --faint: #94A3B8;
            --border: #E2E8F0;
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-cta: 24px;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg);
            color: var(--body);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            display: block;
            max-width: 100%;
            object-fit: cover;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s, border-color 0.2s, background-color 0.2s, box-shadow 0.2s, transform 0.2s;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        /* 导航 */
        .main-nav {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 50;
            height: 76px;
            display: flex;
            align-items: center;
        }
        .main-nav .nav-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 20px;
            color: var(--heading);
            letter-spacing: -0.5px;
        }
        .brand-logo .mark {
            width: 34px;
            height: 34px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            font-weight: 800;
        }
        .brand-logo .sub {
            font-size: 13px;
            font-weight: 500;
            color: var(--muted);
            margin-left: 2px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 36px;
        }
        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--muted);
            position: relative;
            padding: 6px 2px;
            letter-spacing: 0.3px;
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .nav-links a.active {
            color: var(--heading);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            padding: 8px;
            color: var(--heading);
            border-radius: 8px;
            transition: background-color 0.2s;
        }
        .mobile-toggle:hover {
            background: #F1F5F9;
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 76px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 0;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 12px 32px rgba(15, 23, 42, 0.06);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                font-size: 16px;
                padding: 12px 0;
                width: 100%;
                line-height: 24px;
                border-bottom: 1px solid #F1F5F9;
            }
            .nav-links a.active::after {
                left: 0;
                transform: none;
                width: 24px;
            }
            .mobile-toggle {
                display: block;
            }
        }
        /* 按钮 */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            border: none;
            transition: all 0.25s;
            box-shadow: 0 2px 8px rgba(59, 130, 246, 0.15);
        }
        .btn-primary:hover {
            background: #2f6fe0;
            box-shadow: 0 6px 20px rgba(59, 130, 246, 0.25);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0) scale(0.98);
        }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(59, 130, 246, 0.3);
            outline-offset: 2px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            font-size: 16px;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border);
            transition: all 0.25s;
        }
        .btn-outline:hover {
            background: #EFF6FF;
            border-color: var(--primary);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(59, 130, 246, 0.1);
        }
        .btn-outline:active {
            transform: translateY(0) scale(0.98);
        }
        .btn-outline:focus-visible {
            outline: 3px solid rgba(59, 130, 246, 0.3);
            outline-offset: 2px;
        }
        /* 标签 */
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 999px;
            white-space: nowrap;
        }
        .tag-accent {
            background: var(--accent-soft);
            color: #0D9488;
        }
        .tag-primary {
            background: rgba(59, 130, 246, 0.1);
            color: var(--primary);
        }
        /* 表格列表式 */
        .table-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: 0 1px 2px rgba(15, 23, 42, 0.02);
            transition: box-shadow 0.25s, border-color 0.25s;
        }
        .table-card:hover {
            box-shadow: 0 8px 32px rgba(59, 130, 246, 0.08);
            border-color: #DCE7F5;
        }
        .rank-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
            min-width: 960px;
        }
        .rank-table thead {
            background: #F8FAFC;
            border-bottom: 1px solid var(--border);
        }
        .rank-table th {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            color: var(--faint);
            font-weight: 600;
            padding: 14px 20px;
            text-align: left;
            white-space: nowrap;
        }
        .rank-table td {
            padding: 18px 20px;
            border-bottom: 1px solid #F1F5F9;
            vertical-align: middle;
            color: var(--body);
            line-height: 1.6;
        }
        .rank-table tbody tr:last-child td {
            border-bottom: none;
        }
        .rank-table tbody tr {
            transition: background-color 0.2s;
        }
        .rank-table tbody tr:hover {
            background: #F8FAFC;
        }
        .rank-num {
            font-weight: 800;
            font-size: 16px;
            color: var(--heading);
            width: 44px;
            display: inline-block;
            font-variant-numeric: tabular-nums;
        }
        .rank-num.hot {
            color: var(--amber2);
        }
        .table-scroll {
            overflow-x: auto;
        }
        /* 移动端卡片表格 */
        .mobile-rank-cards {
            display: none;
        }
        @media (max-width: 768px) {
            .table-scroll {
                display: none;
            }
            .mobile-rank-cards {
                display: flex;
                flex-direction: column;
                gap: 16px;
            }
            .mobile-rank-card {
                background: #fff;
                border: 1px solid var(--border);
                border-radius: var(--radius-card);
                padding: 20px;
                display: grid;
                grid-template-columns: auto 1fr auto;
                gap: 14px;
                align-items: center;
                transition: box-shadow 0.25s, border-color 0.25s;
            }
            .mobile-rank-card .rank-badge {
                width: 40px;
                height: 40px;
                border-radius: 12px;
                background: #F1F5F9;
                display: flex;
                align-items: center;
                justify-content: center;
                font-weight: 800;
                font-size: 15px;
                color: var(--heading);
            }
            .mobile-rank-card .rank-badge.top {
                background: rgba(245, 158, 11, 0.15);
                color: #B45309;
            }
            .mobile-rank-card .card-title {
                font-size: 16px;
                font-weight: 700;
                color: var(--heading);
                margin-bottom: 4px;
            }
            .mobile-rank-card .card-meta {
                font-size: 12px;
                color: var(--faint);
                display: flex;
                flex-wrap: wrap;
                gap: 8px;
            }
            .mobile-rank-card .popularity {
                font-size: 20px;
                font-weight: 800;
                color: var(--primary);
                font-variant-numeric: tabular-nums;
            }
        }
        /* 推荐卡片 */
        .refresh-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: transform 0.25s, box-shadow 0.25s;
            display: block;
        }
        .refresh-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(59, 130, 246, 0.12);
        }
        .refresh-card .thumb {
            aspect-ratio: 16/9;
            overflow: hidden;
        }
        .refresh-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s;
        }
        .refresh-card:hover .thumb img {
            transform: scale(1.03);
        }
        .refresh-card .info {
            padding: 20px;
        }
        .refresh-card .info h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--heading);
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .refresh-card .info p {
            font-size: 14px;
            color: var(--muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .refresh-card .meta {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: var(--faint);
        }
        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--border);
        }
        .faq-item summary {
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 4px;
            font-size: 16px;
            font-weight: 600;
            color: var(--heading);
            cursor: pointer;
            transition: color 0.2s;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item[open] summary {
            color: var(--primary);
        }
        .faq-item .icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(20, 184, 166, 0.12);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 600;
            flex-shrink: 0;
            transition: transform 0.3s;
        }
        .faq-item[open] .icon {
            transform: rotate(45deg);
        }
        .faq-item .answer {
            padding: 0 24px 24px;
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
        }
        /* CTA */
        .cta-banner {
            background: #EFF6FF;
            border-radius: var(--radius-cta);
            padding: 48px 40px;
            text-align: center;
        }
        @media (max-width: 768px) {
            .cta-banner {
                padding: 36px 20px;
            }
        }
        /* 页脚 */
        .site-footer {
            border-top: 1px solid var(--border);
            background: #fff;
            margin-top: 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding: 48px 0 32px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--muted);
            max-width: 360px;
            margin-top: 14px;
            line-height: 1.7;
        }
        .footer-links h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--heading);
            margin-bottom: 16px;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li+li {
            margin-top: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--muted);
            transition: color 0.2s;
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 24px 0 28px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .footer-bottom span {
            font-size: 12px;
            color: var(--faint);
        }
        .back-top {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--muted);
            font-size: 14px;
            transition: all 0.2s;
        }
        .back-top:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                padding: 36px 0 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }
        /* 通用 */
        .section-title {
            font-size: 24px;
            font-weight: 700;
            color: var(--heading);
            line-height: 1.3;
        }
        .section-title .mark {
            color: var(--primary);
        }
        .section-subtitle {
            font-size: 14px;
            color: var(--muted);
            margin-top: 8px;
        }
        .divider {
            height: 1px;
            background: var(--border);
            border: none;
            margin: 32px 0;
        }
        .lead-text {
            font-size: 16px;
            color: var(--body);
            line-height: 1.8;
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 20px;
            }
        }

/* roulang page: category2 */
:root {
    --primary: #3B82F6;
    --primary-light: #60A5FA;
    --accent: #14B8A6;
    --amber: #F59E0B;
    --bg: #F8FAFC;
    --card: #FFFFFF;
    --title: #0F172A;
    --body: #334155;
    --secondary: #64748B;
    --muted: #94A3B8;
    --border: #E2E8F0;
    --radius-card: 16px;
    --radius-btn: 10px;
    --radius-pill: 999px;
    --radius-cta: 24px;
    --shadow: 0 4px 16px rgba(59,130,246,0.06);
    --shadow-hover: 0 8px 32px rgba(59,130,246,0.12);
    --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }

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

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

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

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

  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,0.94);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
  }

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

  .brand-logo .mark {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 18px;
    box-shadow: 0 2px 8px rgba(59,130,246,0.25);
  }

  .brand-logo > span:last-child {
    font-weight: 800;
    font-size: 18px;
    color: var(--title);
    letter-spacing: 0.5px;
    white-space: nowrap;
  }

  .brand-logo .sub {
    font-size: 12px;
    color: var(--muted);
    font-weight: 500;
    margin-left: 4px;
  }

  .main-nav {
    display: flex;
    gap: 32px;
    align-items: center;
  }

  .main-nav a {
    font-size: 14px;
    color: var(--secondary);
    font-weight: 500;
    position: relative;
    padding: 8px 4px;
    transition: color 0.2s;
  }

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

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

  .main-nav a.active::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--primary);
    border-radius: 999px;
  }

  .menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid var(--border);
    align-items: center;
    justify-content: center;
    color: var(--secondary);
    transition: background 0.2s, color 0.2s;
  }

  .menu-toggle:hover {
    background: var(--bg);
    color: var(--primary);
  }

  .mobile-menu {
    display: none;
    padding: 12px 24px 20px;
    border-top: 1px solid var(--border);
    background: #fff;
  }

  .mobile-menu a {
    display: block;
    padding: 14px 0;
    font-size: 16px;
    color: var(--secondary);
    border-bottom: 1px solid #F1F5F9;
  }

  .mobile-menu a:last-child {
    border-bottom: none;
  }

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

  .hero {
    position: relative;
    min-height: 520px;
    display: flex;
    align-items: center;
    background-image: linear-gradient(180deg, rgba(239,246,255,0.92), rgba(248,250,252,0.78)), url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    padding: 80px 0;
  }

  .hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.85);
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    padding: 6px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 24px;
  }

  .hero-tag::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
  }

  .hero-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 800;
    line-height: 1.2;
    color: var(--title);
    max-width: 720px;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
  }

  .hero-subtitle {
    font-size: 16px;
    line-height: 1.8;
    color: var(--secondary);
    max-width: 640px;
    margin-bottom: 36px;
  }

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

  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--primary);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    padding: 14px 32px;
    border-radius: var(--radius-btn);
    box-shadow: 0 4px 16px rgba(59,130,246,0.3);
    transition: all 0.25s;
  }

  .btn-primary:hover {
    background: #2563eb;
    box-shadow: 0 8px 28px rgba(59,130,246,0.4);
    transform: translateY(-1px);
  }

  .btn-primary:active {
    transform: translateY(0) scale(0.98);
  }

  .btn-primary:focus-visible {
    outline: 3px solid rgba(59,130,246,0.3);
    outline-offset: 2px;
  }

  .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: #fff;
    color: var(--primary);
    font-size: 15px;
    font-weight: 600;
    padding: 14px 32px;
    border-radius: var(--radius-btn);
    border: 1px solid var(--border);
    transition: all 0.25s;
  }

  .btn-secondary:hover {
    background: #EFF6FF;
    border-color: var(--primary-light);
  }

  .btn-secondary:active {
    transform: scale(0.98);
  }

  .btn-secondary:focus-visible {
    outline: 3px solid rgba(59,130,246,0.2);
    outline-offset: 2px;
  }

  .section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
  }

  .section-tag::before {
    content: '';
    width: 20px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
  }

  .section-title {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 700;
    color: var(--title);
    line-height: 1.3;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
  }

  .section-desc {
    font-size: 15px;
    color: var(--secondary);
    line-height: 1.7;
    max-width: 640px;
    margin-bottom: 48px;
  }

  .timeline-section {
    background: #fff;
  }

  .timeline-list {
    position: relative;
    padding-top: 8px;
  }

  .timeline-list::before {
    content: '';
    position: absolute;
    left: 180px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
    border-radius: 2px;
  }

  .timeline-item {
    position: relative;
    display: flex;
    align-items: flex-start;
    margin-bottom: 44px;
  }

  .timeline-item:last-child {
    margin-bottom: 0;
  }

  .timeline-marker {
    flex-shrink: 0;
    width: 180px;
    text-align: right;
    padding-right: 40px;
    font-size: 14px;
    font-weight: 600;
    color: var(--secondary);
    line-height: 1.5;
    position: relative;
    padding-top: 4px;
  }

  .timeline-marker::after {
    content: '';
    position: absolute;
    right: -7px;
    top: 8px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid #fff;
    box-shadow: 0 0 0 2px rgba(20,184,166,0.3);
    transition: box-shadow 0.3s;
  }

  .timeline-item:hover .timeline-marker::after {
    box-shadow: 0 0 0 5px rgba(20,184,166,0.15);
  }

  .timeline-card {
    flex: 1;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: 20px 24px;
    display: flex;
    gap: 20px;
    transition: box-shadow 0.3s, border-color 0.3s, transform 0.3s;
  }

  .timeline-card:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-light);
    transform: translateY(-2px);
  }

  .timeline-img {
    width: 120px;
    height: 84px;
    object-fit: cover;
    border-radius: 10px;
    flex-shrink: 0;
    background: var(--bg);
  }

  .timeline-body {
    flex: 1;
  }

  .timeline-body .badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    background: rgba(20,184,166,0.08);
    border: 1px solid rgba(20,184,166,0.3);
    padding: 3px 10px;
    border-radius: var(--radius-pill);
    margin-bottom: 8px;
  }

  .timeline-body h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--title);
    margin-bottom: 6px;
    line-height: 1.4;
  }

  .timeline-body p {
    font-size: 14px;
    color: var(--secondary);
    line-height: 1.6;
  }

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

  .type-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: 28px 24px;
    transition: box-shadow 0.3s, border-color 0.3s, transform 0.3s;
  }

  .type-card:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-light);
    transform: translateY(-4px);
  }

  .type-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59,130,246,0.1);
    color: var(--primary);
    margin-bottom: 16px;
  }

  .type-card:nth-child(2) .type-icon {
    background: rgba(20,184,166,0.1);
    color: var(--accent);
  }

  .type-card:nth-child(3) .type-icon {
    background: rgba(245,158,11,0.1);
    color: var(--amber);
  }

  .type-card:nth-child(4) .type-icon {
    background: rgba(99,102,241,0.1);
    color: #6366F1;
  }

  .type-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--title);
    margin-bottom: 8px;
  }

  .type-card p {
    font-size: 14px;
    color: var(--secondary);
    line-height: 1.6;
  }

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

  .value-item {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: 32px 24px;
    text-align: center;
    transition: box-shadow 0.3s, transform 0.3s;
  }

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

  .value-num {
    font-size: 40px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 12px;
    font-variant-numeric: tabular-nums;
  }

  .value-item h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--title);
    margin-bottom: 8px;
  }

  .value-item p {
    font-size: 14px;
    color: var(--secondary);
    line-height: 1.6;
  }

  .scenarios-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .scenario-card {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: 24px;
    transition: box-shadow 0.3s, border-color 0.3s;
  }

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

  .scenario-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
    flex-shrink: 0;
    margin-top: 6px;
    box-shadow: 0 0 0 4px rgba(59,130,246,0.12);
  }

  .scenario-card:nth-child(2) .scenario-dot {
    background: var(--accent);
    box-shadow: 0 0 0 4px rgba(20,184,166,0.12);
  }

  .scenario-card:nth-child(3) .scenario-dot {
    background: var(--amber);
    box-shadow: 0 0 0 4px rgba(245,158,11,0.12);
  }

  .scenario-card:nth-child(4) .scenario-dot {
    background: #6366F1;
    box-shadow: 0 0 0 4px rgba(99,102,241,0.12);
  }

  .scenario-card h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--title);
    margin-bottom: 6px;
  }

  .scenario-card p {
    font-size: 14px;
    color: var(--secondary);
    line-height: 1.6;
  }

  .faq-item {
    border-bottom: 1px solid var(--border);
  }

  .faq-item:last-child {
    border-bottom: none;
  }

  .faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--title);
    text-align: left;
    transition: color 0.2s;
  }

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

  .faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(20,184,166,0.1);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform 0.3s, background 0.3s;
  }

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

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

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

  .faq-answer p {
    padding: 0 0 20px 0;
    font-size: 14px;
    color: var(--secondary);
    line-height: 1.7;
  }

  .cta-wrap {
    background: #EFF6FF;
    border-radius: var(--radius-cta);
    padding: 56px 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  .cta-wrap::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 4px;
    background: var(--amber);
    border-radius: 0 0 4px 4px;
  }

  .cta-wrap h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--title);
    margin-bottom: 12px;
  }

  .cta-wrap p {
    font-size: 14px;
    color: var(--secondary);
    margin-bottom: 32px;
  }

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

  .site-footer {
    border-top: 1px solid var(--border);
    background: #fff;
    padding: 64px 0 24px;
  }

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

  .footer-brand p {
    font-size: 14px;
    color: var(--secondary);
    line-height: 1.7;
    margin-top: 16px;
    max-width: 360px;
  }

  .footer-links h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--title);
    margin-bottom: 16px;
  }

  .footer-links ul {
    list-style: none;
    padding: 0;
  }

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

  .footer-links a {
    font-size: 14px;
    color: var(--secondary);
    transition: color 0.2s;
  }

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

  .footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--muted);
  }

  .back-top {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: 1px solid var(--border);
    color: var(--secondary);
    transition: all 0.2s;
  }

  .back-top:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
  }

  .back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-weight: 600;
    font-size: 15px;
    transition: gap 0.2s;
  }

  .back-link:hover {
    gap: 12px;
  }

  @media (max-width: 1024px) {
    .types-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    .values-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
      grid-template-columns: 1fr 1fr;
    }
  }

  @media (max-width: 768px) {
    .main-nav {
      display: none;
    }
    .menu-toggle {
      display: flex;
    }
    .mobile-menu.open {
      display: block;
    }
    .hero {
      min-height: 440px;
      padding: 60px 0;
    }
    .hero-title {
      font-size: 32px;
    }
    .timeline-list::before {
      left: 12px;
    }
    .timeline-item {
      flex-direction: column;
      padding-left: 40px;
    }
    .timeline-marker {
      width: auto;
      text-align: left;
      padding-right: 0;
      padding-bottom: 8px;
      font-size: 13px;
    }
    .timeline-marker::after {
      right: auto;
      left: -31px;
      top: 4px;
    }
    .timeline-card {
      flex-direction: column;
      padding: 16px;
    }
    .timeline-img {
      width: 100%;
      height: 140px;
    }
    .scenarios-grid {
      grid-template-columns: 1fr;
    }
    .cta-wrap {
      padding: 40px 24px;
    }
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }
    .footer-bottom {
      flex-direction: column;
      gap: 16px;
    }
  }

  @media (max-width: 640px) {
    .types-grid {
      grid-template-columns: 1fr;
    }
    .values-grid {
      grid-template-columns: 1fr;
    }
    .container {
      padding-left: 16px;
      padding-right: 16px;
    }
    .hero-subtitle {
      font-size: 15px;
    }
    .btn-primary, .btn-secondary {
      width: 100%;
    }
  }