:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}

* { box-sizing: border-box; }
body { margin: 0; background: Canvas; color: CanvasText; }
a { color: LinkText; }
header, main, footer { width: min(920px, calc(100% - 32px)); margin: 0 auto; }
header { padding: 42px 0 18px; border-bottom: 1px solid color-mix(in srgb, CanvasText 16%, transparent); }
main { padding: 26px 0 56px; }
footer { padding: 20px 0 42px; border-top: 1px solid color-mix(in srgb, CanvasText 16%, transparent); font-size: 14px; opacity: .78; }
h1 { margin: 0 0 8px; font-size: clamp(30px, 5vw, 44px); line-height: 1.2; }
h2 { margin-top: 34px; font-size: 22px; }
p, li { max-width: 78ch; }
nav { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 16px; }
.card { padding: 18px 20px; margin: 18px 0; border: 1px solid color-mix(in srgb, CanvasText 16%, transparent); border-radius: 14px; }
.meta { font-size: 14px; opacity: .76; }
.notice { padding: 14px 16px; border-left: 4px solid currentColor; background: color-mix(in srgb, CanvasText 6%, transparent); }
code { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }