/* 炙渊 · 入口页与接入文档共用样式 */
:root{
  --bg:#303030;
  --ink:#f0f0f0;
  --muted:#c6c6c6;
  --line:rgba(255,255,255,.10);
  --panel:#3a3a3a;
  --hover:rgba(255,255,255,.06);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  min-height:100vh;
  background:var(--bg);
  color:var(--ink);
  font-family:"LXGW WenKai","LXGW WenKai Screen",-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
  line-height:1.9;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
::selection{background:rgba(128,128,128,.35)}

/* 导航 */
.nav{position:sticky;top:0;z-index:20;background:var(--bg);border-bottom:1px solid var(--line)}
.nav-inner{max-width:1180px;margin:0 auto;height:68px;padding:0 22px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:9px;flex:none}
.brand img{width:34px;height:34px;object-fit:contain}
.brand span{font-size:17px;font-weight:600;letter-spacing:.02em}
.nav-links{display:flex;align-items:center;gap:6px;flex:none}
.nav-links a{padding:7px 11px;border-radius:7px;font-size:14.5px;color:var(--muted);transition:color .2s,background-color .2s}
.nav-links a:hover{color:var(--ink);background:var(--hover)}
.nav-links a.last{color:var(--ink);border:1px solid var(--line)}

/* 首页 */
.hero{max-width:1180px;margin:0 auto;padding:0 22px}
.hero-inner{min-height:calc(100vh - 190px);display:flex;align-items:center;justify-content:space-between;gap:40px;padding:56px 0 40px}
.hero-copy{flex:1 1 auto;min-width:0}
.kicker{display:inline-block;font-size:13px;letter-spacing:.18em;color:var(--muted);text-transform:lowercase}
.hero h1{margin:14px 0 18px;font-size:clamp(54px,8.4vw,104px);line-height:1.05;font-weight:600;letter-spacing:.06em}
.lead{font-size:clamp(15px,1.5vw,18px);color:var(--muted);line-height:1.95}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.btn{display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 22px;border-radius:8px;font-size:15px;border:1px solid transparent;transition:background-color .2s,color .2s,border-color .2s}
.btn.primary{background:var(--ink);color:var(--bg)}
.btn.primary:hover{background:var(--muted)}
.btn.ghost{border-color:var(--line);color:var(--ink)}
.btn.ghost:hover{background:var(--hover)}
.hero-art{flex:0 1 420px;max-width:420px;width:100%}
.hero-art svg{width:100%;height:auto;display:block}

.facts{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}
.facts div{padding:22px 4px 26px;display:flex;align-items:baseline;gap:10px;font-size:14.5px;color:var(--muted)}
.facts span{font-size:12px;letter-spacing:.12em;color:var(--ink);opacity:.55}
.facts div + div{border-left:1px solid var(--line);padding-left:22px}

.foot{max-width:1180px;margin:0 auto;padding:26px 22px 34px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--muted)}

/* 接入文档 */
.doc{max-width:880px;margin:0 auto;padding:54px 22px 72px}
.doc-head{max-width:720px;margin-bottom:42px}
.doc-head h1{font-size:clamp(34px,5vw,48px);line-height:1.25;font-weight:600;margin-bottom:14px}
.doc-head p{color:var(--muted);font-size:15.5px}
.doc h2{font-size:21px;font-weight:600;margin:44px 0 14px}
.doc h2:first-of-type{margin-top:0}
.doc h3{font-size:16.5px;font-weight:600;margin:26px 0 10px}
.doc p{color:var(--muted);font-size:15px;margin:10px 0}
.doc ul,.doc ol{margin:10px 0 10px 22px;color:var(--muted);font-size:15px}
.doc li{margin:6px 0}
.doc strong{color:var(--ink);font-weight:600}
.doc code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;font-size:13.5px;background:var(--hover);border:1px solid var(--line);border-radius:5px;padding:1px 6px;color:var(--ink)}
.doc pre{margin:14px 0 18px;padding:16px 18px;background:#282828;border:1px solid var(--line);border-radius:10px;overflow-x:auto;line-height:1.7}
.doc pre code{background:none;border:0;padding:0;font-size:13px;color:#e8e8e8;white-space:pre}

.card{border:1px solid var(--line);border-radius:10px;padding:18px 20px;background:var(--panel);margin:18px 0}
.card .row{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px;font-size:14.5px;color:var(--muted)}
.card .row + .row{margin-top:8px;padding-top:8px;border-top:1px solid var(--line)}
.card .row b{color:var(--ink);font-weight:600;min-width:64px}
.copy{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13.5px;color:var(--ink)}

table{width:100%;border-collapse:collapse;margin:14px 0 18px;font-size:14px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--ink);font-weight:600;background:var(--hover)}
td{color:var(--muted)}
.note{border-left:2px solid var(--muted);padding:2px 0 2px 14px;margin:16px 0;color:var(--muted);font-size:14.5px}

@media (max-width:900px){
  .hero-inner{flex-direction:column;align-items:flex-start;gap:28px;min-height:0;padding:44px 0 34px}
  .hero-art{max-width:340px;align-self:flex-end}
  .nav-links a{padding:7px 8px;font-size:13.5px}
}
@media (max-width:560px){
  .nav-inner{height:60px;padding:0 16px}
  .brand span{font-size:15.5px}
  .nav-links{gap:2px}
  .nav-links a:nth-child(2){display:none}
  .hero{padding:0 16px}
  .hero h1{letter-spacing:.03em}
  .facts{grid-template-columns:1fr}
  .facts div + div{border-left:0;border-top:1px solid var(--line);padding-left:4px}
  .doc{padding:40px 16px 60px}
  .foot{padding:22px 16px 28px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}