:root {
  --bg: #f6f3ee;
  --fg: #1f1b16;
  --muted: #6b6258;
  --card: #fffdf9;
  --line: #e2d9cc;
  --accent: #b5481c;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15120f;
    --fg: #ece5da;
    --muted: #a99d8e;
    --card: #1e1a16;
    --line: #3a322a;
    --accent: #f08a4b;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Segoe UI", sans-serif;
}
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
header { border-bottom: 3px solid var(--accent); padding-bottom: 12px; margin-bottom: 24px; }
h1 { font-size: 1.8rem; line-height: 1.3; margin: 0; }
h2 { font-size: 1.25rem; margin: 2em 0 0.5em; }
h3 { font-size: 1.05rem; margin: 1.4em 0 0.3em; }
.sub { color: var(--muted); margin: 4px 0 0; }
nav { margin-top: 12px; display: flex; gap: 16px; flex-wrap: wrap; }
a { color: var(--accent); }
section { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 4px 20px 16px; margin: 20px 0; }
.lang { color: var(--muted); font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase; margin-top: 16px; }
.mail { font-size: 1.15rem; font-weight: 600; }
footer { color: var(--muted); font-size: 0.85rem; margin-top: 40px; }
ul { padding-left: 1.3em; }