:root{--bg:#f6f5f0;--fg:#1d1d1f;--muted:#5f5f66;--card:#ffffff;--line:#dcdad2;--accent:#2f9e57}
@media (prefers-color-scheme:dark){:root{--bg:#111214;--fg:#ececec;--muted:#a3a3ab;--card:#1b1c1f;--line:#2e2f34;--accent:#5bd982}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif}
main{max-width:760px;margin:0 auto;padding:40px 16px 64px}
header{display:flex;align-items:center;gap:12px;margin-bottom:28px}
header .logo{width:40px;height:40px;image-rendering:pixelated}
header a{color:var(--fg);text-decoration:none;font-weight:700;font-size:18px}
h1{font-size:28px;line-height:1.25;margin:0 0 6px}
h2{font-size:20px;margin:32px 0 8px}
h3{font-size:17px;margin:20px 0 4px}
p,li{color:var(--fg)}
.muted{color:var(--muted);font-size:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;margin:20px 0}
a{color:var(--accent)}
nav.lang{display:flex;flex-wrap:wrap;gap:8px 14px;font-size:14px;margin:8px 0 24px}
hr{border:0;border-top:1px solid var(--line);margin:48px 0}
footer{color:var(--muted);font-size:13px;margin-top:48px}