:root {
  --bg: #f6f9fc;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #475569;
  --line: #dbe4f0;
  --brand: #1d4ed8;
  --brand-soft: #eff6ff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 980px; margin: 0 auto; padding: 24px 16px 56px; }
.topbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  font-size: 14px;
  color: var(--muted);
}
.hero, .card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
}
.hero { padding: 28px; margin-bottom: 18px; }
.hero h1 { margin: 0 0 12px; font-size: 32px; line-height: 1.3; }
.hero p { margin: 0; color: var(--muted); font-size: 16px; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 18px; }
.card { padding: 22px; }
.card h2 { margin: 0 0 12px; font-size: 22px; }
.card p, .card li { color: var(--muted); font-size: 15px; }
.card ul, .card ol { margin: 0; padding-left: 20px; }
.notice {
  padding: 14px 16px;
  border-radius: 12px;
  background: var(--brand-soft);
  color: #1e3a8a;
  border: 1px solid #bfdbfe;
  margin: 16px 0;
}
.link-list { display: flex; flex-wrap: wrap; gap: 10px; }
.link-list a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  background: #f8fbff;
  border: 1px solid #cfe0ff;
  font-size: 14px;
}
footer { margin-top: 18px; color: var(--muted); font-size: 13px; }
code { background: #eff6ff; padding: 1px 6px; border-radius: 6px; }
@media (max-width: 820px) {
  .grid { grid-template-columns: 1fr; }
  .hero { padding: 22px; }
  .hero h1 { font-size: 26px; }
}