/* 第2套：左侧栏 + 全幅暗色头图，藏青描金 */
:root {
  --navy: #0b1f3a;
  --navy-2: #132c4e;
  --gold: #d4a017;
  --gold-2: #f0c14b;
  --cream: #f4f1e8;
  --ink: #1b2430;
  --muted: #5a6573;
}

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

body {
  font-family: Georgia, "Songti SC", "SimSun", "Microsoft YaHei", serif;
  background: var(--cream);
  color: var(--ink);
  line-height: 1.8;
  font-size: 16px;
}

a { color: #8a6a0a; }
a:hover { color: var(--gold); }

.shell {
  display: grid;
  grid-template-columns: 230px 1fr;
  min-height: 100vh;
}

.side {
  background: var(--navy);
  color: #e8e2d4;
  padding: 28px 20px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.side .logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-family: "Microsoft YaHei", sans-serif;
  font-weight: 700;
  font-size: 20px;
  text-decoration: none;
  margin-bottom: 28px;
}
.side nav a {
  display: block;
  color: #c9c3b4;
  text-decoration: none;
  padding: 10px 12px;
  margin-bottom: 6px;
  border-left: 3px solid transparent;
  font-family: "Microsoft YaHei", sans-serif;
}
.side nav a:hover { color: var(--gold-2); }
.side nav a.active {
  color: var(--gold-2);
  border-left-color: var(--gold);
  background: rgba(212, 160, 23, 0.08);
}
.side .note {
  margin-top: 36px;
  font-size: 12px;
  color: #9aa3ad;
  line-height: 1.6;
}

.main { min-width: 0; }

.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 55%, #1b3d66 100%);
  color: #f7f2e6;
  padding: 56px 48px 48px;
}
.hero h1 {
  font-size: 32px;
  line-height: 1.4;
  font-weight: 700;
  max-width: 820px;
  margin-bottom: 16px;
}
.hero .lead {
  max-width: 720px;
  color: #d5ccb8;
  margin-bottom: 24px;
  font-size: 17px;
}
.btn {
  display: inline-block;
  font-family: "Microsoft YaHei", sans-serif;
  font-weight: 700;
  padding: 12px 26px;
  text-decoration: none;
}
.btn-gold { background: var(--gold); color: #1a1406; }
.btn-gold:hover { background: var(--gold-2); color: #1a1406; }
.btn-line { border: 1px solid #e6d7a8; color: #f4ead0; margin-left: 10px; }
.btn-line:hover { background: rgba(255,255,255,0.06); color: #fff; }

.content { padding: 36px 48px 56px; max-width: 980px; }

.content section { margin-bottom: 40px; }
.content h2 {
  font-size: 24px;
  color: var(--navy);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--gold);
  display: inline-block;
}
.content p { margin-bottom: 12px; }
.content ol.feat {
  list-style: none;
  counter-reset: f;
}
.content ol.feat li {
  counter-increment: f;
  padding: 14px 0 14px 52px;
  position: relative;
  border-bottom: 1px solid #e0d8c6;
}
.content ol.feat li::before {
  content: counter(f, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 14px;
  color: var(--gold);
  font-weight: 700;
  font-size: 18px;
  font-family: "Microsoft YaHei", sans-serif;
}

table.plain {
  width: 100%;
  border-collapse: collapse;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 14px;
  margin: 14px 0;
  background: #fff;
}
table.plain th, table.plain td {
  border: 1px solid #e4dcc8;
  padding: 9px 12px;
  text-align: left;
}
table.plain th { background: #efe8d6; }

.faq-item { padding: 12px 0; border-bottom: 1px solid #e0d8c6; }
.faq-item h3 { font-size: 17px; margin-bottom: 6px; font-family: "Microsoft YaHei", sans-serif; }

.dl-strip {
  background: #fff;
  border: 1px solid #e4dcc8;
  padding: 18px 20px;
  margin: 20px 0;
}
.dl-strip .btn { margin: 6px 8px 6px 0; }

footer {
  background: #081526;
  color: #b8c0c8;
  padding: 22px 48px;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 13px;
}
footer .safe { color: #c6e2a6; margin-bottom: 8px; }
footer a { color: var(--gold-2); }

@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .side { position: relative; height: auto; }
  .side nav { display: flex; flex-wrap: wrap; gap: 6px; }
  .hero, .content, footer { padding-left: 20px; padding-right: 20px; }
  .btn-line { margin-left: 0; margin-top: 8px; }
}