:root {
  --bg: #0a0908;
  --surface: #13120f;
  --text: #e6dbcc;
  --muted: #928a80;
  --line: #38332b;
  --accent: #ed7a29;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #faf7f2;
    --surface: #f1ece3;
    --text: #231f1a;
    --muted: #6f675d;
    --line: #ddd5c8;
    --accent: #c75c12;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.8 "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
}
main { max-width: 680px; margin: 0 auto; padding: 56px 20px 80px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 40px; }
header img { width: 52px; height: 52px; border-radius: 12px; }
header .name { font-size: 26px; font-weight: 600; line-height: 1.2; }
header .tagline { color: var(--muted); font-size: 15px; }
nav { display: flex; gap: 20px; margin: -16px 0 40px; font-family: -apple-system, "PingFang SC", sans-serif; font-size: 15px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 30px; font-weight: 600; line-height: 1.3; margin: 0 0 8px; }
h2 { font-size: 20px; font-weight: 600; margin: 40px 0 8px; padding-top: 24px; border-top: 1px solid var(--line); }
p, li { margin: 8px 0; }
ul { padding-left: 1.2em; }
.muted { color: var(--muted); font-size: 15px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; margin: 20px 0; }
.en { font-family: -apple-system, "Helvetica Neue", sans-serif; font-size: 16px; line-height: 1.7; }
footer { margin-top: 56px; color: var(--muted); font-size: 14px; }