:root{--bg:#fff;--sidebar:#f7f8fa;--txt:#1c2333;--dim:#5b6478;--acc:#4f46e5;--line:#e4e7ee;--code:#0f1424}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg);color:var(--txt);font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:var(--acc);text-decoration:none}a:hover{text-decoration:underline}
code,pre{font-family:"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace}
header{border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);z-index:9}
.hd{max-width:1240px;margin:0 auto;padding:0 24px;height:58px;display:flex;align-items:center;gap:26px}
.lg{font-weight:700;font-size:17px;letter-spacing:-.02em;color:var(--txt);display:flex;align-items:center;gap:8px}
.lg svg{width:20px;height:20px}
.hd nav{display:flex;gap:22px;font-size:14px;color:var(--dim)}
.hd nav a{color:var(--dim)}
.hd .right{margin-left:auto;display:flex;gap:16px;align-items:center;font-size:14px}
.ver{font-size:12px;border:1px solid var(--line);border-radius:5px;padding:2px 8px;color:var(--dim)}
.layout{max-width:1240px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:236px 1fr;gap:44px}
aside{border-right:1px solid var(--line);padding:30px 20px 60px 0;position:sticky;top:58px;height:calc(100vh - 58px);overflow:auto}
aside h5{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--dim);margin:22px 0 9px}
aside h5:first-child{margin-top:0}
aside a{display:block;padding:5px 10px;margin-left:-10px;border-radius:6px;color:var(--dim);font-size:14.5px}
aside a:hover{background:var(--sidebar);text-decoration:none;color:var(--txt)}
aside a.cur{background:#eef0fe;color:var(--acc);font-weight:600}
main{padding:38px 0 90px;min-width:0}
h1{font-size:34px;letter-spacing:-.025em;margin-bottom:12px}
h2{font-size:23px;margin:38px 0 12px;letter-spacing:-.015em;padding-top:6px}
h3{font-size:17.5px;margin:26px 0 8px}
p{margin-bottom:14px;color:#333c52}
.lead{font-size:18px;color:var(--dim);margin-bottom:26px}
pre{background:var(--code);color:#dfe4f2;padding:17px 19px;border-radius:9px;overflow:auto;font-size:13.5px;line-height:1.6;margin:16px 0}
pre .k{color:#c792ea}pre .s{color:#c3e88d}pre .c{color:#6b7590}pre .f{color:#82aaff}pre .n{color:#f78c6c}
:not(pre)>code{background:#f2f3f7;padding:2px 6px;border-radius:5px;font-size:13.5px;color:#b5316b}
ul,ol{margin:0 0 15px 22px;color:#333c52}
li{margin-bottom:6px}
table{width:100%;border-collapse:collapse;font-size:14.5px;margin:16px 0}
th,td{border:1px solid var(--line);padding:9px 12px;text-align:left}
th{background:var(--sidebar);font-weight:600}
.note{border-left:3px solid var(--acc);background:#f6f6ff;padding:13px 17px;border-radius:0 8px 8px 0;margin:18px 0;font-size:15px}
.warn{border-left:3px solid #d97706;background:#fffaf1;padding:13px 17px;border-radius:0 8px 8px 0;margin:18px 0;font-size:15px}
.hero{border-bottom:1px solid var(--line);padding:66px 24px 56px;text-align:center}
.hero h1{font-size:46px}
.badges{display:flex;gap:8px;justify-content:center;margin:18px 0 26px;flex-wrap:wrap}
.badges span{font-size:12px;background:var(--sidebar);border:1px solid var(--line);border-radius:5px;padding:3px 9px;color:var(--dim)}
.btnrow{display:flex;gap:12px;justify-content:center}
.btn{background:var(--acc);color:#fff;padding:11px 22px;border-radius:8px;font-size:15px;font-weight:500}
.btn:hover{background:#4338ca;text-decoration:none}
.btn.sec{background:var(--sidebar);color:var(--txt);border:1px solid var(--line)}
.feat{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;max-width:1000px;margin:52px auto;padding:0 24px}
.feat div{border:1px solid var(--line);border-radius:11px;padding:22px}
.feat h3{margin:0 0 7px;font-size:16px}
.feat p{font-size:14.5px;color:var(--dim);margin:0}
footer{border-top:1px solid var(--line);padding:26px 0;font-size:14px;color:var(--dim)}
.fh{max-width:1240px;margin:0 auto;padding:0 24px;display:flex;gap:20px;flex-wrap:wrap}
.fh a{color:var(--dim)}
@media(max-width:900px){.layout{grid-template-columns:1fr}aside{display:none}.feat{grid-template-columns:1fr}}