:root{--paper:#f4efe6;--card:#fbf8f2;--ink:#1d1b18;--ink2:#4a453e;--ink3:#7b746a;--line:#e2dacb;--seal:#b23a2a;--code:#efe8da;
--serif:"Songti SC","STSong","Noto Serif SC","Source Han Serif SC","Noto Serif CJK SC",serif;
--sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",sans-serif;
--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
@media (prefers-color-scheme:dark){:root{--paper:#1a1916;--card:#23211d;--ink:#ece6da;--ink2:#c9c1b3;--ink3:#948b7d;--line:#3a362f;--seal:#d0553f;--code:#2b2924}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.75 var(--sans);overflow-x:hidden}
a{color:var(--seal);text-underline-offset:3px}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header.top{border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-family:var(--serif);font-size:20px;font-weight:700;letter-spacing:.08em}
.seal{display:inline-grid;place-items:center;width:30px;height:30px;background:var(--seal);color:#fff;border-radius:5px;font-size:12px;line-height:1.05;letter-spacing:0;writing-mode:vertical-rl;padding:2px}
nav.main{display:flex;gap:20px;font-size:15px}nav.main a{color:var(--ink2);text-decoration:none}nav.main a:hover{color:var(--seal)}
@media (max-width:640px){nav.main{gap:14px;font-size:14px}nav.main .opt{display:none}}
h1,h2,h3{font-family:var(--serif);line-height:1.3;letter-spacing:.02em}
h1{font-size:44px;margin:0 0 18px}h2{font-size:30px;margin:0 0 14px}h3{font-size:20px;margin:0 0 6px}
@media (max-width:640px){h1{font-size:32px}h2{font-size:25px}}
.hero{padding:64px 0 40px}.hero p.lead{font-size:19px;color:var(--ink2);max-width:720px;margin:0 0 26px}
.btns{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.btn{display:inline-block;padding:12px 22px;border-radius:10px;text-decoration:none;font-weight:600;border:1px solid var(--ink)}
.btn.primary{background:var(--ink);color:var(--paper)}.btn.ghost{color:var(--ink)}
.meta{color:var(--ink3);font-size:14px;margin-top:12px}
.cmd{display:flex;align-items:center;gap:10px;background:var(--code);border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin:18px 0 0;max-width:720px}
.cmd code{flex:1;font:14px/1.5 var(--mono);overflow-x:auto;white-space:nowrap}
button.copy{font:13px var(--sans);padding:6px 12px;border-radius:7px;border:1px solid var(--ink3);background:var(--card);color:var(--ink);cursor:pointer;flex:none}
figure{margin:0}.shot{background:#2b2724;border-radius:14px;padding:10px;box-shadow:0 18px 50px rgba(40,30,20,.18)}
.shot img{border-radius:8px}figcaption{color:var(--ink3);font-size:13px;margin-top:8px;text-align:center}
section{padding:48px 0;border-top:1px solid var(--line)}
.feature{display:grid;grid-template-columns:1fr 1.35fr;gap:36px;align-items:center;margin:40px 0}
.feature.rev{grid-template-columns:1.35fr 1fr}.feature.rev .txt{order:2}
@media (max-width:820px){.feature,.feature.rev{grid-template-columns:1fr}.feature.rev .txt{order:0}}
.feature ul,.prose ul,.prose ol{padding-left:1.2em;margin:8px 0}.feature li,.prose li{margin:4px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 20px}
.card p{margin:4px 0 0;color:var(--ink2);font-size:15px}
table{width:100%;border-collapse:collapse;font-size:15px;background:var(--card);border-radius:12px;overflow:hidden}
th,td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top}th{font-weight:600;white-space:nowrap}
.tablewrap{overflow-x:auto}
ol.steps{counter-reset:s;list-style:none;padding:0}ol.steps>li{counter-increment:s;position:relative;padding-left:44px;margin:16px 0}
ol.steps>li::before{content:counter(s);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:50%;background:var(--seal);color:#fff;display:grid;place-items:center;font-weight:700;font-size:14px}
details{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin:10px 0}
summary{cursor:pointer;font-weight:600}details p{margin:8px 0 0;color:var(--ink2)}
.prose{max-width:760px}.prose h2{font-size:24px;margin:36px 0 10px}.prose p{margin:10px 0}
pre{background:var(--code);border:1px solid var(--line);border-radius:10px;padding:14px;overflow-x:auto;font:13.5px/1.6 var(--mono)}
code{font-family:var(--mono);font-size:.92em}p code,li code,td code{background:var(--code);padding:1px 5px;border-radius:4px;overflow-wrap:anywhere}
.crumb{font-size:14px;color:var(--ink3);margin:28px 0 8px}.crumb a{color:var(--ink3)}
.note{border-left:3px solid var(--seal);padding:4px 0 4px 14px;color:var(--ink2)}
footer{border-top:1px solid var(--line);padding:32px 0 48px;color:var(--ink3);font-size:14px}
footer .cols{display:flex;flex-wrap:wrap;gap:12px 28px}footer a{color:var(--ink2)}