:root{--bg:#f3eee4;--paper:#fbf8f2;--ink:#1d1b18;--ink2:#5b554c;--line:#ddd5c6;--chip:#ebe4d6;--red:#e2360f;--blue:#105eb4}
@media (prefers-color-scheme:dark){:root{--bg:#151413;--paper:#1e1c1a;--ink:#ece7de;--ink2:#a8a093;--line:#35312c;--chip:#2a2723;--blue:#7fb2ee}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 -apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif}
a{color:var(--blue)}
.bar{position:sticky;top:0;background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line);padding:12px 20px;font-size:14px;z-index:5}
.bar a{text-decoration:none}
.doc{max-width:900px;margin:0 auto;padding:28px 20px 80px}
.kicker{font-size:13px;letter-spacing:.12em;color:var(--red);font-weight:600;margin:0}
.note{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:12px 16px;color:var(--ink2);font-size:15px}
h1{font-size:30px;line-height:1.3;margin:10px 0 18px}
h2{font-size:22px;margin:40px 0 10px;line-height:1.35}
h3{font-size:18px;margin:28px 0 8px}
h4{font-size:16px;margin:22px 0 6px}
hr{border:0;border-top:1px solid var(--line);margin:32px 0}
code{font:13px/1.5 ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--chip);padding:1px 6px;border-radius:5px}
blockquote{margin:12px 0;padding:6px 14px;border-left:3px solid var(--line);color:var(--ink2)}
ul,ol{padding-left:1.3em}
li{margin:.25em 0}
li.sub{margin-left:1.4em;list-style:circle}
.tw{overflow-x:auto;margin:14px 0;border:1px solid var(--line);border-radius:12px;background:var(--paper)}
table{border-collapse:collapse;width:100%;font-size:14.5px}
th,td{text-align:left;vertical-align:top;padding:8px 12px;border-top:1px solid var(--line)}
thead th{border-top:0;background:var(--chip);font-size:13px;color:var(--ink2);white-space:nowrap}
@media (max-width:600px){.doc{padding:20px 16px 60px}h1{font-size:24px}table{font-size:13.5px}th,td{padding:7px 9px}}