:root{--bg:#fffdf7;--fg:#141414;--muted:#5b5b5b;--accent:#E6FEC8;--line:#141414}
@media (prefers-color-scheme:dark){:root{--bg:#121212;--fg:#f2f2f2;--muted:#a6a6a6;--line:#f2f2f2}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 -apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang SC","Helvetica Neue",sans-serif}
header,main,footer{max-width:760px;margin:0 auto;padding:0 20px}
header{display:flex;justify-content:space-between;align-items:center;padding-top:20px;padding-bottom:20px;border-bottom:2px solid var(--line)}
.brand{font-weight:800;font-size:22px;text-decoration:none;color:var(--fg);background:var(--accent);color:#141414;padding:2px 10px;border:2px solid #141414;box-shadow:3px 3px 0 #141414}
nav a{margin-left:16px;color:var(--fg);text-decoration:none;font-size:15px}
nav a:hover{text-decoration:underline}
h1{font-size:32px;line-height:1.2;margin:40px 0 24px}
h2{font-size:21px;margin:40px 0 12px;padding-top:12px;border-top:1px solid color-mix(in srgb,var(--fg) 15%,transparent)}
h3{font-size:17px;margin:24px 0 8px}
.zh{display:block;font-weight:inherit;color:var(--muted);font-size:.92em}
h1 .zh{font-size:20px;margin-top:6px}
p{margin:0 0 10px}
li{margin-bottom:8px}
a{color:inherit}
footer{margin-top:64px;padding-top:20px;padding-bottom:40px;border-top:2px solid var(--line);color:var(--muted);font-size:14px}
footer p{margin:4px 0}
.cta{display:inline-block;margin:8px 0 24px;padding:12px 22px;background:var(--accent);color:#141414;font-weight:700;text-decoration:none;border:2px solid #141414;box-shadow:4px 4px 0 #141414}
.lead{font-size:19px}