:root{--bg:#fff;--bg2:#f4f8fb;--fg:#17202e;--mut:#5b6b80;--line:#e1e8f0;--brand:#0a5c99;--acc:#0fa3b1;--card:#fff;--code:#f1f5f9;--shadow:0 1px 3px #0a2a4a14,0 8px 24px #0a2a4a0d}
@media(prefers-color-scheme:dark){:root{--bg:#0d141d;--bg2:#101b28;--fg:#e6edf5;--mut:#9fb0c3;--line:#223246;--brand:#4aa3e0;--acc:#2cc4d2;--card:#132131;--code:#0b1520;--shadow:none}}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}.wrap.narrow{max-width:760px}.center{text-align:center}.muted{color:var(--mut)}
.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:22px;height:60px}.brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:18px;color:var(--fg)}.brand:hover{text-decoration:none}
.top nav{display:flex;gap:6px}.top nav a,.top .btn,.top .ghost{white-space:nowrap}.top nav a{padding:6px 12px;border-radius:7px;color:var(--mut)}.top nav a.on,.top nav a:hover{color:var(--fg);background:var(--bg2);text-decoration:none}.sp{flex:1}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:8px 16px;border-radius:8px;font-weight:600;border:1px solid var(--brand);cursor:pointer;font-size:15px}
.btn:hover{text-decoration:none;filter:brightness(1.08)}.btn.lg{padding:12px 24px;font-size:16px}
.ghost{color:var(--fg);padding:8px 12px}.btn.ghost{background:none;border:1px solid var(--line);color:var(--fg)}
.hero{padding:84px 0 56px;background:radial-gradient(1200px 400px at 50% -10%,#0fa3b122,transparent),linear-gradient(var(--bg2),var(--bg))}.hero.small{padding:56px 0 36px;text-align:center}
.hero h1{font-size:clamp(30px,5vw,50px);line-height:1.2;margin:0 0 18px;letter-spacing:-.5px;max-width:920px}.hero.small h1{margin-inline:auto}
.lead{font-size:clamp(16px,2vw,19px);color:var(--mut);max-width:720px;margin:0 0 28px}.hero.small .lead{margin-inline:auto}
.actions{display:flex;gap:12px;flex-wrap:wrap}.center .actions,.hero.small .actions{justify-content:center}
section{padding:60px 0}.band{background:var(--bg2)}h2{font-size:28px;margin:0 0 26px;letter-spacing:-.3px}h3{font-size:17px;margin:0 0 6px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px;box-shadow:var(--shadow)}.card p{margin:0;color:var(--mut);font-size:15px}
.steps{list-style:none;margin:0 0 36px;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:22px}
.steps li{display:flex;gap:14px}.steps b{flex:none;width:34px;height:34px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center}.steps p{margin:0;color:var(--mut);font-size:15px}
.diagram{width:100%;height:auto;max-width:820px;display:block;margin:0 auto}
.diagram .bx rect{fill:var(--card);stroke:var(--line);stroke-width:1.5}.diagram .bx.hl rect{stroke:var(--brand);stroke-width:2}.diagram .in{fill:var(--bg2)!important;stroke:var(--line)}
.diagram .t1{fill:var(--fg);font:600 14px sans-serif}.diagram .t2{fill:var(--mut);font:13px sans-serif}.diagram .t3{fill:var(--mut);font:12px sans-serif}.diagram .accent{fill:var(--acc);font-weight:600}
.diagram .ln{stroke:var(--mut);stroke-width:1.8;fill:none}.diagram .dash{stroke-dasharray:5 4}.diagram .acc{stroke:var(--acc);stroke-width:2.4}.fillline{fill:var(--mut)}
.two{display:grid;grid-template-columns:1fr 1.3fr;gap:36px;align-items:start}@media(max-width:800px){.two{grid-template-columns:1fr}}
.ticks{list-style:none;margin:0;padding:0}.ticks li{position:relative;padding:5px 0 5px 26px}.ticks li:before{content:"";position:absolute;left:3px;top:13px;width:11px;height:6px;border-left:2.5px solid var(--acc);border-bottom:2.5px solid var(--acc);transform:rotate(-45deg)}
.plans{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}.plan{display:flex;flex-direction:column;gap:6px}.plan .ticks{flex:1;margin:12px 0 18px;font-size:15px}.plan .btn{text-align:center}
.price b{font-size:36px;letter-spacing:-1px}.price small{color:var(--mut);margin-left:4px}.sub{color:var(--mut);font-size:14px}.tag{background:#12a35520;color:#12a355;border-radius:5px;padding:1px 7px;font-size:12.5px;margin-left:6px}
.notice{display:inline-block;margin-top:18px;background:#0fa3b118;border:1px solid #0fa3b155;border-radius:9px;padding:9px 16px}
details{border-bottom:1px solid var(--line);padding:14px 0}summary{cursor:pointer;font-weight:600}details p{margin:10px 0 0;color:var(--mut)}
.foot{border-top:1px solid var(--line);padding:26px 0;color:var(--mut);font-size:14px}.foot .wrap{display:flex;flex-wrap:wrap;gap:12px 28px;align-items:center}.foot .links{display:flex;gap:18px;flex:1}
/* 文档 */
.docs{display:grid;grid-template-columns:230px minmax(0,1fr) 190px;gap:34px;padding-top:30px;padding-bottom:60px}
.side{position:sticky;top:76px;align-self:start;max-height:calc(100vh - 90px);overflow:auto}.side input{width:100%;padding:8px 11px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--fg);font-size:14px}
.grp{margin-top:18px}.grp h4,.toc h4{margin:0 0 6px;font-size:12.5px;text-transform:none;letter-spacing:.5px;color:var(--mut);font-weight:600}.grp a{display:block;padding:5px 10px;border-radius:6px;color:var(--fg);font-size:14.5px}.grp a.on{background:var(--bg2);color:var(--brand);font-weight:600}.grp a:hover{background:var(--bg2);text-decoration:none}
.dres{margin-top:6px}.dres a{display:block;padding:7px 9px;border-radius:6px;color:var(--fg);font-size:14px}.dres a:hover{background:var(--bg2);text-decoration:none}.dres small{display:block;color:var(--mut);font-size:12.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.toc{position:sticky;top:76px;align-self:start;font-size:13.5px}.toc a{display:block;padding:3px 0;color:var(--mut)}.toc a:hover{color:var(--brand)}
.doc{min-width:0}.doc h1{font-size:32px;margin:0 0 18px;letter-spacing:-.4px}.doc h2{font-size:22px;margin:38px 0 12px;padding-top:6px}.doc p,.doc li{color:var(--fg)}.doc li{margin:3px 0}
.doc code{background:var(--code);padding:2px 6px;border-radius:5px;font:13.5px ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.doc pre{background:var(--code);border-radius:9px;padding:14px 16px;overflow:auto;border:1px solid var(--line)}.doc pre code{background:none;padding:0}
.doc table{border-collapse:collapse;width:100%;display:block;overflow-x:auto;margin:14px 0}.doc th,.doc td{border:1px solid var(--line);padding:8px 12px;text-align:left;vertical-align:top;font-size:14.5px}.doc th{background:var(--bg2)}
.pn{display:flex;justify-content:space-between;margin-top:48px;padding-top:18px;border-top:1px solid var(--line)}
@media(max-width:1000px){.docs{grid-template-columns:200px minmax(0,1fr)}.toc{display:none}}
@media(max-width:720px){.top .btn{padding:6px 10px;font-size:14px}.top nav{gap:0}.top nav a{padding:6px 7px;font-size:15px}.brand{font-size:16px;gap:7px}.top .wrap{gap:6px;padding:0 14px}.docs{grid-template-columns:1fr}.side{position:static;max-height:none}.top nav a{padding:6px 8px}.top .wrap{gap:10px}.top .ghost{display:none}.hero{padding:52px 0 36px}section{padding:42px 0}}
.doc.legal{max-width:780px;margin:0 auto;padding:30px 0 60px}