:root {
  --fg: #1f2328;
  --muted: #57606a;
  --accent: #b3541e;
  --border: #e4e0d8;
  --bg: #fbf8f2;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.75;
}
.site-header {
  padding: 28px 20px 12px;
  text-align: center;
}
.site-header h1 { margin: 0; font-size: 24px; }
.site-header p { margin: 4px 0 0; color: var(--muted); }
.nav {
  display: flex;
  justify-content: center;
  gap: 18px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.nav a { color: var(--accent); text-decoration: none; font-size: 14px; }
.nav a:hover { text-decoration: underline; }
.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 20px 20px 60px;
}
.container h2 { font-size: 19px; margin-top: 32px; border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.container h3 { font-size: 16px; margin-top: 22px; color: var(--accent); }
.container p, .container li { font-size: 15px; }
.container table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 13px;
}
.container th, .container td {
  border: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}
.container th { background: #f2ede3; }
.container a { color: var(--accent); word-break: break-all; }
.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}
.site-footer a { color: var(--muted); }