:root{--bg:#FBF7F2;--fg:#24211E;--muted:#6B6157;--accent:#14614F;--border:#D0C2B2}
@media (prefers-color-scheme:dark){:root{--bg:#17161A;--fg:#F2EEE9;--muted:#A79E94;--accent:#4FA98D;--border:#3A3842}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 -apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue",Arial,"PingFang SC","Noto Sans CJK SC",sans-serif}
main{max-width:720px;margin:0 auto;padding:40px 20px 80px}
h1{font-size:28px;line-height:1.25;margin:0 0 4px}
.sub{color:var(--muted);font-size:15px;margin-bottom:32px}
h2{font-size:20px;margin:36px 0 8px;color:var(--accent)}
h3{font-size:17px;margin:24px 0 6px}
p,li{color:var(--fg)}
ul{padding-left:22px}
a{color:var(--accent)}
hr{border:0;border-top:1px solid var(--border);margin:48px 0}
.box{background:rgba(20,97,79,.06);border-left:3px solid var(--accent);padding:14px 16px;border-radius:8px;margin:18px 0}
footer{color:var(--muted);font-size:14px;margin-top:48px}