:root {
  color-scheme: light;
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #172033;
  background: #f4f6f9;
}

* { box-sizing: border-box; }
body { margin: 0; line-height: 1.75; }
header { background: #001f4d; color: #fff; }
.inner, main, footer { width: min(880px, calc(100% - 32px)); margin: 0 auto; }
.inner { padding: 20px 0; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
header a { color: #fff; text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: 16px; font-size: 14px; }
main { margin-top: 24px; margin-bottom: 24px; padding: 28px; background: #fff; border-radius: 14px; box-shadow: 0 4px 24px rgba(23, 32, 51, .07); }
h1 { margin-top: 0; line-height: 1.25; font-size: 28px; }
h2 { margin-top: 30px; font-size: 20px; }
a { color: #075bc7; }
.meta, .muted { color: #667085; }
.notice { padding: 14px 16px; border-left: 4px solid #075bc7; border-radius: 6px; background: #eef6ff; }
footer { padding: 0 0 28px; color: #667085; font-size: 13px; text-align: center; }

@media (max-width: 620px) {
  .inner { align-items: flex-start; flex-direction: column; }
  main { padding: 20px; }
}