:root {
  --bg: #faf9f7;
  --text: #1c1b1a;
  --muted: #6b6762;
  --line: #e6e2dc;
  --accent: #2f5d50;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615;
    --text: #ecebe8;
    --muted: #a19d97;
    --line: #2d2c2a;
    --accent: #8cc2b0;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", sans-serif;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 48px 20px 80px; }
header { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; border-bottom: 1px solid var(--line); padding-bottom: 16px; margin-bottom: 40px; }
.brand { font-weight: 700; font-size: 20px; color: var(--text); text-decoration: none; letter-spacing: -0.01em; }
nav a { color: var(--muted); text-decoration: none; margin-left: 16px; font-size: 14px; }
nav a:first-child { margin-left: 0; }
nav a:hover, nav a[aria-current] { color: var(--accent); }
h1 { font-size: 32px; line-height: 1.25; letter-spacing: -0.02em; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 40px 0 8px; }
h3 { font-size: 16px; margin: 24px 0 4px; }
p, li { color: var(--text); }
.muted, .zh { color: var(--muted); }
.zh { font-size: 15px; }
a { color: var(--accent); overflow-wrap: anywhere; }
ul { padding-left: 20px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; margin: 12px 0; }
th, td { text-align: left; vertical-align: top; padding: 8px 8px 8px 0; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; }
.table-scroll { overflow-x: auto; }
footer { margin-top: 64px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 13px; color: var(--muted); }
footer a { color: var(--muted); }