/* 根域：场景驱动 — 单栏长文、衬线标题、海军蓝描金 */
:root {
  --ink: #102033;
  --navy: #0b1f3a;
  --gold: #c9a227;
  --cream: #f4f0e6;
  --paper: #fffdf8;
  --line: #d7cba8;
  --muted: #5c6570;
  --danger: #8a2b2b;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--cream);
  line-height: 1.75;
}

.site-head {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--navy);
  border-bottom: 3px solid var(--gold);
}
.brand-row {
  max-width: 760px;
  margin: 0 auto;
  padding: 14px 20px 0;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}
.brand {
  color: #fff;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  text-decoration: none;
}
.brand span { color: var(--gold); }
nav {
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 20px 12px;
}
nav a {
  color: #d5dce6;
  text-decoration: none;
  margin-right: 22px;
  font-size: 0.95rem;
  border-bottom: 2px solid transparent;
  padding-bottom: 4px;
}
nav a:hover { color: #fff; }
nav a.now {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.hero {
  background: linear-gradient(165deg, #081526 0%, #16345c 70%, #0b1f3a 100%);
  color: #f7f2e4;
  padding: 56px 20px 48px;
}
.hero-inner { max-width: 760px; margin: 0 auto; }
.hero h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 600;
  font-size: 2rem;
  line-height: 1.35;
  margin: 0 0 16px;
}
.hero p { color: #d9d2bc; margin: 0 0 22px; max-width: 40em; }
.btn-go {
  display: inline-block;
  background: var(--gold);
  color: #1a1404;
  text-decoration: none;
  padding: 12px 26px;
  font-weight: 700;
}
.btn-go:hover { filter: brightness(1.08); }
.btn-line {
  display: inline-block;
  margin-left: 12px;
  color: #f3e6b8;
  border: 1px solid #f3e6b8;
  padding: 11px 20px;
  text-decoration: none;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 20px 48px;
}
section {
  background: var(--paper);
  margin: 28px 0;
  padding: 22px 26px 24px;
  border-left: 5px solid var(--gold);
}
section h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.35rem;
  margin: 0 0 12px;
  color: var(--navy);
}
p { margin: 0 0 12px; }
ul, ol { margin: 0 0 12px; padding-left: 1.2em; }
li { margin-bottom: 6px; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  margin: 10px 0 14px;
}
th, td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
}
th { background: #efe6cf; }
.note {
  background: #f8edd0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  margin: 12px 0;
}
.risk {
  border-left-color: var(--danger);
  background: #fff6f4;
}
.risk h2 { color: var(--danger); }
.dl-row a {
  display: inline-block;
  margin: 6px 10px 6px 0;
  padding: 8px 14px;
  background: var(--navy);
  color: #fff;
  text-decoration: none;
}
.faq details {
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
}
.faq summary { cursor: pointer; font-weight: 600; color: var(--navy); }
.faq p { margin-top: 8px; color: var(--muted); }

.site-foot {
  background: var(--navy);
  color: #c5cdd6;
  padding: 28px 20px 36px;
  font-size: 0.88rem;
}
.site-foot .wrap { max-width: 760px; margin: 0 auto; }
.site-foot p { margin: 0 0 10px; }
.site-foot a { color: #e6d18a; }

@media (max-width: 640px) {
  .hero h1 { font-size: 1.45rem; }
  .btn-line { display: block; margin: 12px 0 0; width: fit-content; }
  nav a { display: inline-block; margin-bottom: 8px; }
}