:root {
  --bg: #f0e7d2;
  --card: #fffaf0;
  --text: #1d1d1f;
  --muted: #5f5a50;
  --accent: #0a66c2;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17191d;
    --card: #23262c;
    --text: #f2f2f2;
    --muted: #a8adb7;
    --accent: #5aa9ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.7 -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", sans-serif;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}
header { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; }
header img { width: 64px; height: 64px; border-radius: 14px; }
h1 { font-size: 28px; margin: 0; }
h2 { font-size: 20px; margin: 32px 0 8px; }
section { background: var(--card); border-radius: 16px; padding: 8px 20px 20px; margin-bottom: 20px; }
p, li { margin: 8px 0; }
.muted { color: var(--muted); font-size: 15px; }
a { color: var(--accent); }
nav { margin-top: 32px; font-size: 15px; }