:root{--ground:#eef1f5;--surface:#fff;--text:#0a0a0a;--muted:#5f6670;--border:#dde2e9;--hue:#1d5fbf;color-scheme:light}
@media (prefers-color-scheme:dark){:root{--ground:#0f1114;--surface:#171a1e;--text:#f2f3f5;--muted:#a1a7b0;--border:#262a31;--hue:#6ea2ff;color-scheme:dark}}
*{box-sizing:border-box}
body{margin:0;background:var(--ground);color:var(--text);font:400 16px/1.6 system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
main{max-width:760px;margin:0 auto;padding:56px 20px 80px}
header{display:flex;align-items:center;gap:12px;margin-bottom:40px}
header img{width:40px;height:40px}
header a{color:inherit;text-decoration:none;font-weight:600;font-size:20px}
nav{margin-left:auto;display:flex;gap:18px}
nav a{color:var(--muted);text-decoration:none;font-size:15px}
nav a:hover,a{color:var(--hue)}
h1{font-size:40px;line-height:1.1;letter-spacing:-.02em;margin:0 0 14px}
h2{font-size:22px;margin:40px 0 10px}
h3{font-size:17px;margin:24px 0 6px}
p,li{max-width:68ch}
.lead{font-size:19px;color:var(--muted);margin:0 0 28px}
section.card{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:4px 24px 20px;margin-top:28px}
ul{padding-left:20px}
footer{margin-top:56px;color:var(--muted);font-size:14px}
nav.langs{gap:4px;flex-wrap:wrap}
nav.langs a{padding:4px 10px;border-radius:6px;border:1px solid transparent}
nav.langs a[aria-current]{color:var(--text);border-color:var(--border);background:var(--surface)}
[hidden]{display:none!important}
article+article{margin-top:56px}
@media (max-width:520px){main{padding-top:32px}h1{font-size:30px}header{flex-wrap:wrap}nav.langs{margin-left:0;width:100%}}
code{overflow-wrap:anywhere}