:root{--brand:#241C63;--accent:#E0104D;--deep:#090037;--ink:#1B1B29;--body:#4B4B5C;--muted:#7A7A8C;--line:#E6E4EF;--font-en:"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--body);font-family:var(--font-en);font-size:15px;line-height:1.9;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}a:hover{color:var(--accent)}
.wrap{width:min(1120px,calc(100% - 48px));margin:0 auto}
header{position:relative;background:var(--deep);border-bottom:1px solid rgba(255,255,255,.1)}
header::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:linear-gradient(90deg,#090037 0%,#373B6C 32%,#8A597E 66%,var(--accent) 100%)}
.nav{height:76px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:#fff}
.brand:hover{color:#fff}
.mark{width:40px;height:40px;border-radius:3px;background:var(--accent);color:#fff;display:grid;place-items:center;font-family:var(--font-en);font-weight:700;font-size:23px;flex:none}
.brand-txt strong{display:block;font-size:15.5px;font-weight:700;letter-spacing:.1em;line-height:1.15;color:#fff}
.cn{display:flex;justify-content:space-between;font-size:12px;font-weight:600;color:#fff;border-top:1px solid rgba(255,255,255,.2);margin-top:5px;padding-top:5px;letter-spacing:0}
.back{font-size:13px;color:rgba(255,255,255,.85);white-space:nowrap}
.back:hover{color:#fff}
.hero{background:var(--brand);color:#fff;padding:64px 0 58px}
.kicker{font-size:11px;letter-spacing:.22em;color:rgba(255,255,255,.7);margin:0 0 18px;text-transform:uppercase}
h1{font-size:clamp(28px,3.6vw,42px);letter-spacing:-.03em;line-height:1.3;margin:0;color:#fff}
.hero p{color:rgba(255,255,255,.8);font-size:14.5px;margin:18px 0 0;max-width:720px}
.doc{padding:64px 0 96px}
.doc-inner{width:min(780px,calc(100% - 48px));margin:0 auto}
.doc h2{font-size:19px;color:var(--ink);margin:44px 0 12px;letter-spacing:-.01em}
.doc h2:first-child{margin-top:0}
.doc h2 em{font-style:normal;color:var(--accent);font-family:var(--font-en);font-size:12px;letter-spacing:.14em;margin-right:12px}
.doc p{margin:0 0 12px}
.doc ul{margin:0 0 16px;padding-left:22px}
.doc li{margin-bottom:7px}
.doc .note{background:#F6F4FD;border-left:3px solid var(--brand);padding:16px 20px;font-size:13.5px;color:var(--ink);margin:20px 0}
.todo{background:transparent;color:inherit;opacity:.7;padding:0 2px;border-bottom:1px dotted currentColor;font-size:.92em}
.meta{font-size:12.5px;color:var(--muted);border-top:1px solid var(--line);padding-top:18px;margin-top:48px}
footer{background:var(--deep);color:rgba(255,255,255,.72);padding:34px 0;font-size:12px}
.f-in{display:flex;flex-wrap:wrap;gap:10px 28px;align-items:center;justify-content:space-between}
footer a{color:rgba(255,255,255,.86)}
@media(max-width:640px){.nav{height:68px}.mark{width:36px;height:36px;font-size:21px}.brand-txt strong{font-size:13.5px}.cn{font-size:10.5px}.doc{padding:44px 0 70px}.hero{padding:48px 0 44px}}