:root {
  --ink: #1c1917;
  --muted: #57534e;
  --paper: #faf7f2;
  --card: #fffdf8;
  --line: #e7e0d4;
  --crimson: #b91c1c;
  --crimson-dark: #7f1d1d;
  --navy: #1e293b;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  font-size: 16px;
}

.topbar {
  background: var(--navy);
  color: #f8fafc;
  padding: 10px 0;
}
.topbar-inner, .nav-inner, .wrap, .foot-inner {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}
.topbar-inner { font-size: 13px; letter-spacing: 0.04em; }

.masthead {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}
.brand {
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 28px;
  color: var(--crimson);
  text-decoration: none;
  font-weight: 700;
}
.menu { display: flex; gap: 28px; list-style: none; margin: 0; padding: 0; }
.menu a {
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
}
.menu a.now { border-bottom-color: var(--crimson); color: var(--crimson); font-weight: 600; }

.scene-hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  padding: 56px 0 40px;
}
.scene-hero h1 {
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 34px;
  line-height: 1.35;
  margin: 0 0 18px;
}
.lede { color: var(--muted); margin: 0 0 24px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }
.btn-main, .btn-side, .btn-os {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  text-decoration: none;
  font-weight: 600;
}
.btn-main { background: var(--crimson); color: #fff; }
.btn-main:hover { background: var(--crimson-dark); }
.btn-side { background: transparent; color: var(--crimson); border: 1px solid var(--crimson); }
.scene-card {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 24px 26px;
}
.scene-card h2 { font-size: 18px; margin: 0 0 12px; }
.scene-card ol { margin: 0; padding-left: 18px; color: var(--muted); }

.session-strip { padding: 36px 0; }
.session-strip.alt { background: #f3eee6; }
.session-strip h2 {
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 26px;
  margin: 0 0 16px;
}
.twocol { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.quote-pair { width: 100%; border-collapse: collapse; font-size: 15px; }
.quote-pair th, .quote-pair td { border-bottom: 1px solid var(--line); text-align: left; padding: 10px 8px; }
.quote-pair th { color: var(--muted); font-weight: 600; }

.note { border-left: 4px solid var(--crimson); padding: 8px 0 8px 16px; color: var(--muted); }
.dl-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 28px; }
.dl-grid dt { font-weight: 700; }
.dl-grid dd { margin: 4px 0 0; color: var(--muted); }

.faq-list { margin: 0; padding: 0; list-style: none; }
.faq-list li { border-top: 1px solid var(--line); padding: 18px 0; }
.faq-list strong { display: block; margin-bottom: 8px; }

.site-foot {
  background: var(--navy);
  color: #cbd5e1;
  padding: 36px 0 28px;
  margin-top: 48px;
  font-size: 14px;
}
.site-foot a { color: #fecaca; }
.foot-nav { display: flex; gap: 20px; margin: 12px 0 20px; }
.safe { color: #bbf7d0; }
.legal { color: #94a3b8; line-height: 1.7; }

@media (max-width: 800px) {
  .scene-hero, .twocol, .dl-grid { grid-template-columns: 1fr; }
  .nav-inner { flex-direction: column; gap: 12px; padding: 12px 0; }
}