:root {
  color-scheme: dark light;
  --bg: #0a1218;
  --surface: #111b24;
  --border: #22323f;
  --text: #f2f8fb;
  --text-2: #b4c7d4;
  --lime: #a2ff1f;
  --sky: #7bd6f5;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #e4eef4;
    --surface: #f2f8fb;
    --border: #cfdde6;
    --text: #0a1218;
    --text-2: #4a6273;
    --lime: #5c9e0a;
    --sky: #2e8fb8;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font:
    16px/1.6 -apple-system,
    'Noto Sans HK',
    'PingFang HK',
    'Segoe UI',
    sans-serif;
}
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}
header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.line {
  width: 44px;
  height: 2px;
  background: var(--lime);
}
h1 {
  font-size: 28px;
  margin: 12px 0 4px;
}
h2 {
  font-size: 20px;
  margin: 32px 0 8px;
}
h3 {
  font-size: 16px;
  margin: 20px 0 4px;
}
p,
li {
  color: var(--text-2);
}
a {
  color: var(--sky);
}
.meta {
  font-size: 13px;
  color: var(--text-2);
}
.lang {
  display: flex;
  gap: 12px;
  margin: 16px 0 24px;
  font-size: 14px;
}
.lang a {
  padding: 6px 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  text-decoration: none;
}
section[lang] {
  border-top: 1px solid var(--border);
  padding-top: 8px;
}
.notice {
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 12px 16px;
  margin: 16px 0;
}
nav.pages {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 14px;
  margin-top: 40px;
}
footer {
  margin-top: 48px;
  font-size: 13px;
  color: var(--text-2);
}