:root {
  --ink: #1d1f22;
  --muted: #5d636b;
  --line: #d9dce0;
  --paper: #fafaf9;
  --link: #1f5fa8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8e9eb;
    --muted: #a0a6ae;
    --line: #34383d;
    --paper: #141517;
    --link: #8ab8ee;
  }
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Archivo", -apple-system, "PingFang TC", "Noto Sans TC", system-ui, sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.7;
  padding: 48px 16px 96px;
}
main { max-width: 640px; margin: 0 auto; }
.brand {
  font-weight: 800;
  font-size: 28px;
  letter-spacing: -0.02em;
}
.sub {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 40px;
}
h1 { font-size: 22px; margin-bottom: 4px; }
.updated { font-size: 13px; color: var(--muted); margin-bottom: 32px; }
h2 { font-size: 15px; margin: 28px 0 8px; }
p, li { font-size: 16px; }
p + p { margin-top: 10px; }
ul { padding-left: 1.2em; }
li + li { margin-top: 4px; }
a { color: var(--link); }
nav.lang { font-size: 14px; margin-bottom: 32px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 56px 0; }
footer { margin-top: 64px; font-size: 12px; color: var(--muted); }