:root {
  color-scheme: light;
  --paper: #f8edcf;
  --paper-light: #fff8e5;
  --ink: #3f2c20;
  --muted: #7a6450;
  --vermilion: #bd4634;
  --line: rgba(122, 100, 80, .24);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font: 16px/1.72 -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", sans-serif;
}
main { width: min(760px, calc(100% - 32px)); margin: 0 auto; padding: 44px 0 72px; }
.brand { color: var(--vermilion); font-weight: 800; letter-spacing: .08em; }
h1, h2 { font-family: STSong, "Songti SC", serif; }
h1 { margin: 10px 0 8px; font-size: clamp(34px, 8vw, 52px); line-height: 1.15; }
h2 { margin: 30px 0 8px; font-size: 22px; }
.updated { margin: 0 0 28px; color: var(--muted); font-size: 14px; }
.card { padding: clamp(22px, 5vw, 38px); border: 1px solid var(--line); border-radius: 24px; background: var(--paper-light); }
p, li { color: var(--muted); }
strong { color: var(--ink); }
a { color: var(--vermilion); text-underline-offset: 3px; }
nav { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; padding-top: 22px; border-top: 1px solid var(--line); }
.en { margin-top: 42px; padding-top: 34px; border-top: 1px solid var(--line); }
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }