:root { color-scheme: light; font-family: system-ui, "Microsoft YaHei", sans-serif; color: #252525; background: #fafafa; }
* { box-sizing: border-box; }
body { margin: 0; }
header, main, footer { width: min(760px, calc(100% - 40px)); margin-inline: auto; }
header { padding-block: 24px; border-bottom: 1px solid #ddd; }
nav { display: flex; flex-wrap: wrap; gap: 12px 24px; }
a { color: #166344; text-underline-offset: 3px; overflow-wrap: anywhere; }
main { padding-block: 32px; }
h1 { font-size: 28px; line-height: 1.4; margin: 0 0 12px; }
h2 { font-size: 19px; line-height: 1.5; margin: 32px 0 12px; }
p { font-size: 16px; line-height: 1.85; margin: 12px 0; overflow-wrap: anywhere; }
.version { color: #606060; font-size: 14px; }
footer { padding-block: 24px; border-top: 1px solid #ddd; }