:root {
  --ink: #1a2744;
  --navy: #163a5f;
  --gold: #b8892a;
  --paper: #f6f1e6;
  --card: #fffdf8;
  --line: #d8c9a8;
  --muted: #5c6170;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Palatino Linotype", "Songti SC", "SimSun", serif;
  line-height: 1.75;
}

.frame {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

.rail {
  background: var(--navy);
  color: #f3ead4;
  padding: 28px 22px 40px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  letter-spacing: 0.08em;
  color: #f3ead4;
  text-decoration: none;
  border-bottom: 1px solid rgba(243, 234, 212, 0.2);
  padding-bottom: 18px;
  margin-bottom: 22px;
}

.rail nav a {
  display: block;
  color: #d7c9a4;
  text-decoration: none;
  padding: 10px 0;
  border-left: 3px solid transparent;
  padding-left: 10px;
}

.rail nav a.current {
  color: #f7e7b6;
  border-left-color: var(--gold);
}

.rail .mini-dl {
  margin-top: 28px;
  display: block;
  text-align: center;
  background: var(--gold);
  color: #1a2744;
  text-decoration: none;
  padding: 10px 12px;
  font-family: "Microsoft YaHei", sans-serif;
}

.sheet { padding: 0 48px 64px; max-width: 1080px; }

.hero {
  padding: 42px 0 18px;
  border-bottom: 2px solid var(--gold);
}

.hero h1 {
  font-size: 32px;
  line-height: 1.35;
  margin: 0 0 16px;
}

.lead { font-size: 17px; color: var(--muted); margin: 0 0 22px; }

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

.btn {
  display: inline-block;
  font-family: "Microsoft YaHei", sans-serif;
  text-decoration: none;
  padding: 10px 18px;
  background: var(--navy);
  color: #fff;
}

.btn-gold { background: var(--gold); color: #1a2744; }

.scene {
  margin: 36px 0;
  background: var(--card);
  border: 1px solid var(--line);
  padding: 22px 26px 8px;
}

.scene h2 {
  margin: 0 0 12px;
  font-size: 22px;
  border-bottom: 1px dashed var(--line);
  padding-bottom: 8px;
}

.scene p { margin: 0 0 14px; }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 14px;
}

th, td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
}

th { background: #efe4cc; }

.faq { margin: 36px 0; }
.faq h2 { font-size: 22px; }
.faq dt { font-weight: bold; margin-top: 16px; }
.faq dd { margin: 6px 0 0 0; color: var(--muted); }

.foot {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 13px;
  color: var(--muted);
}

.foot a { color: var(--navy); }

@media (max-width: 900px) {
  .frame { grid-template-columns: 1fr; }
  .rail { position: relative; height: auto; }
  .sheet { padding: 0 20px 40px; }
  .two-col { grid-template-columns: 1fr; }
}