:root{--ink:#1d2622;--muted:#56625c;--line:#dde3df;--accent:#0e6b58;--bg:#fafbfa}
@media (prefers-color-scheme:dark){:root{--ink:#e3eae6;--muted:#9aa7a1;--line:#2c3532;--accent:#52c4a8;--bg:#131816}}
*{box-sizing:border-box}
html{background:var(--bg)}
body{margin:0;color:var(--ink);background:var(--bg);font:16px/1.75 "PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;padding:0 16px}
main{max-width:720px;margin:0 auto;padding:40px 0 24px}
h1{font-size:28px;margin:0 0 8px}
h2{font-size:18px;margin:32px 0 8px;padding-bottom:6px;border-bottom:1px solid var(--line)}
.lead{color:var(--muted);margin:0}
ul{padding-left:20px}
a{color:var(--accent)}
table{width:100%;border-collapse:collapse;font-size:15px;display:block;overflow-x:auto}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:600}
footer{max-width:720px;margin:24px auto 0;padding:20px 0 32px;border-top:1px solid var(--line);text-align:center;font-size:14px;color:var(--muted)}
footer p{margin:4px 0}
footer a{color:var(--muted)}