:root{--bg:#090909;--card:#121212;--line:#262626;--tx:#ededed;--mu:#9a9a9a;--ac:#ff4b20}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--tx);font:15px/1.8 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",sans-serif;-webkit-font-smoothing:antialiased;
background-image:radial-gradient(900px 500px at 85% -10%,rgba(255,75,32,.16),transparent 60%),linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);background-size:auto,64px 64px,64px 64px}
a{color:var(--ac);text-decoration:none}a:hover{text-decoration:underline}
header{position:sticky;top:0;z-index:5;backdrop-filter:blur(14px);background:rgba(9,9,9,.72);border-bottom:1px solid var(--line)}
.bar{max-width:880px;margin:auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:10px;color:var(--tx);font-size:12px;letter-spacing:.22em;font-weight:600}.brand:hover{text-decoration:none}.brand img{width:28px;height:28px;border-radius:8px}
nav{display:flex;gap:8px;flex-wrap:wrap}nav a{font-size:13px;color:var(--tx);border:1px solid var(--line);border-radius:999px;padding:5px 14px;background:#141414}nav a:hover{border-color:var(--ac);text-decoration:none}nav a.on{background:var(--ac);border-color:var(--ac);color:#fff}
main{max-width:880px;margin:auto;padding:56px 24px 40px}
.eyebrow{color:var(--ac);font-size:12px;letter-spacing:.2em;text-transform:uppercase;font-weight:600}
h1{font-size:40px;line-height:1.2;margin:10px 0 6px;letter-spacing:-.01em}h1:after{content:"";display:block;width:48px;height:3px;background:var(--ac);border-radius:2px;margin-top:18px}
.meta{color:var(--mu);font-size:13px;margin:16px 0 28px}
.lang{display:inline-flex;gap:4px;padding:4px;border:1px solid var(--line);border-radius:999px;margin-bottom:28px}.lang a{padding:4px 14px;border-radius:999px;font-size:13px;color:var(--mu)}.lang a.on{background:#1f1f1f;color:var(--tx)}
section.doc{margin-bottom:72px}
.card{background:linear-gradient(180deg,#141414,#0f0f0f);border:1px solid var(--line);border-radius:16px;padding:24px 28px;margin:16px 0}
h2{font-size:19px;margin:0 0 10px;display:flex;gap:10px;align-items:baseline}h2 .n{color:var(--ac);font:600 13px/1 ui-monospace,Menlo,monospace}
h3{font-size:15px;margin:16px 0 4px}p{margin:8px 0}ul{margin:8px 0;padding-left:20px}li{margin:4px 0}li::marker{color:var(--ac)}
.muted{color:var(--mu)}strong{color:#fff}
table{width:100%;border-collapse:collapse;font-size:14px;margin-top:8px}td,th{border-top:1px solid var(--line);padding:9px 8px;text-align:left;vertical-align:top}th{color:var(--mu);font-weight:500}
.contact{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--ac);color:#fff;border-radius:12px;padding:11px 20px;font-weight:600;box-shadow:0 8px 30px rgba(255,75,32,.3)}.btn:hover{text-decoration:none;filter:brightness(1.08)}
details{border-top:1px solid var(--line);padding:14px 0}details:first-of-type{border-top:0}summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px}summary::-webkit-details-marker{display:none}summary:after{content:"+";color:var(--ac);font-size:20px;line-height:1}details[open] summary:after{content:"–"}details p{color:#cfcfcf}
footer{border-top:1px solid var(--line);color:var(--mu);font-size:12px}footer .bar{padding:22px 24px}
@media(max-width:600px){body{font-size:14.5px}main{padding:36px 18px 24px}h1{font-size:30px}.card{padding:18px 18px;border-radius:14px}.bar{padding:12px 16px}.brand span{display:none}nav a{padding:4px 11px;font-size:12px}footer .bar{flex-direction:column;align-items:flex-start}}