:root {
  --bg: #0a0a0b;
  --card: #161618;
  --text: #f2f2f4;
  --muted: #9898a4;
  --accent: #ff9500;
  --line: #303136;
  --max: 42rem;
}
* { box-sizing: border-box; }
html { color-scheme: dark; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}
header {
  border-bottom: 1px solid var(--line);
  padding-bottom: 1.25rem;
  margin-bottom: 1.75rem;
}
.brand {
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}
.nav {
  margin-top: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.1rem;
  font-size: 0.92rem;
}
.meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0.35rem 0 0;
}
h1 {
  font-size: 1.85rem;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin: 0 0 0.75rem;
}
h2 {
  font-size: 1.15rem;
  margin: 2rem 0 0.65rem;
  letter-spacing: -0.02em;
}
h3 { font-size: 1rem; margin: 1.25rem 0 0.4rem; color: #ddd; }
p, li { color: #d6d6dc; }
ul { padding-left: 1.2rem; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 0.75rem 0 1rem;
}
th, td {
  border: 1px solid var(--line);
  padding: 0.55rem 0.65rem;
  text-align: left;
  vertical-align: top;
}
th { background: var(--card); color: var(--text); }
hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2rem 0;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.1rem 1.15rem;
  margin: 1rem 0;
}
.home-links a {
  display: block;
  padding: 0.85rem 1rem;
  margin: 0.5rem 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text);
  font-weight: 600;
}
.home-links a:hover {
  border-color: var(--accent);
  text-decoration: none;
}
.home-links span {
  display: block;
  color: var(--muted);
  font-weight: 500;
  font-size: 0.85rem;
  margin-top: 0.2rem;
}
footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}