:root {
  --bg: #080b14;
  --bg-card: #111726;
  --line: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --red: #c7000b;
  --red-hot: #e50012;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}
a { color: #f87171; text-decoration: none; }
a:hover { color: #fecaca; }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }
.top {
  position: sticky; top: 0; z-index: 20;
  background: rgba(11, 15, 25, 0.94);
  border-bottom: 1px solid var(--line);
}
.top-inner {
  max-width: 1100px; margin: 0 auto; padding: 14px 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { color: #fff; font-weight: 800; font-size: 18px; }
.nav { display: flex; flex-wrap: wrap; gap: 14px; font-size: 14px; color: #cbd5e1; }
.nav a { color: #cbd5e1; }
.nav a:hover, .nav a.active { color: #f87171; }
.hero { padding: 48px 0 12px; }
h1 { font-size: 34px; line-height: 1.25; margin: 0 0 12px; color: #fff; }
h2 { font-size: 22px; color: #fff; margin: 36px 0 12px; }
h3 { font-size: 18px; color: #fff; margin: 24px 0 8px; }
.lead { font-size: 18px; color: #cbd5e1; }
.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px 22px;
  margin: 16px 0;
}
.btn {
  display: inline-block;
  background: linear-gradient(90deg, var(--red), #990007);
  color: #fff !important;
  padding: 12px 20px;
  border-radius: 12px;
  font-weight: 700;
  margin: 8px 8px 8px 0;
}
.btn.alt { background: #1e293b; }
ol, ul { padding-left: 1.3em; }
.foot {
  margin-top: 56px;
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 13px;
}
.disclaimer { color: #64748b; font-size: 12px; }
@media (max-width: 720px) {
  h1 { font-size: 26px; }
  .nav { display: none; }
}