:root{--bg:#f7f3ea;--paper:#fffdf8;--ink:#1e2a24;--muted:#5f6c64;--line:#e6ddcb;--grid:#197a4f;--grid-t:#146b45}
@media (prefers-color-scheme:dark){:root{--bg:#121814;--paper:#1b231e;--ink:#ecf1ec;--muted:#9aa89f;--line:#2c3a31;--grid:#4fc28a;--grid-t:#4fc28a}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
main{max-width:720px;margin:0 auto;padding:40px 20px 72px}
.logo{font-family:"Noto Serif SC","Songti SC",serif;font-size:40px;color:#c43a27;line-height:1}
h1{font-size:28px;margin:12px 0 4px}
h2{font-size:19px;margin:32px 0 8px}
.sub{color:var(--muted);margin:0 0 8px}
p,li{color:var(--ink)}
ul{padding-left:20px}
a{color:var(--grid-t)}
.card{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin:16px 0}
footer{margin-top:48px;padding-top:16px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}