:root{--bg:#ffffff;--bg2:#f5f7fa;--txt:#1b2430;--muted:#5f6b7a;--line:#e3e8ee;--pri:#0f6e56;--pri2:#e1f5ee;--dark:#0b1e2d}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--txt);background:var(--bg)}
a{color:var(--pri);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
header{position:sticky;top:0;background:rgba(255,255,255,.95);backdrop-filter:blur(6px);border-bottom:1px solid var(--line);z-index:10}
header .wrap{display:flex;align-items:center;gap:24px;height:64px}
.logo{font-weight:700;font-size:18px;color:var(--dark);display:flex;align-items:center;gap:10px}
.logo i{width:28px;height:28px;border-radius:8px;background:var(--pri);display:inline-block;position:relative}
.logo i::after{content:"";position:absolute;left:6px;right:6px;top:13px;height:2px;background:#fff;box-shadow:0 -5px 0 #fff,0 5px 0 #fff;opacity:.9}
nav{display:flex;gap:20px;margin-left:auto;font-size:15px}
nav a{color:var(--txt)}
.lang{border:1px solid var(--line);background:#fff;border-radius:999px;padding:4px 12px;font-size:13px;cursor:pointer;color:var(--muted)}
.hero{background:linear-gradient(180deg,var(--bg2),#fff);padding:80px 0 64px;border-bottom:1px solid var(--line)}
.hero h1{font-size:40px;line-height:1.25;margin:0 0 16px;color:var(--dark)}
.hero p{font-size:18px;color:var(--muted);max-width:720px;margin:0 0 28px}
.btn{display:inline-block;background:var(--pri);color:#fff;padding:12px 22px;border-radius:8px;font-weight:600}
.btn:hover{text-decoration:none;opacity:.92}
.btn.ghost{background:#fff;color:var(--pri);border:1px solid var(--pri);margin-left:10px}
section{padding:64px 0}
section+section{border-top:1px solid var(--line)}
h2{font-size:28px;margin:0 0 8px;color:var(--dark)}
.sub{color:var(--muted);margin:0 0 32px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px}
.card h3{margin:0 0 8px;font-size:18px;color:var(--dark)}
.card p{margin:0;color:var(--muted);font-size:15px}
.tag{display:inline-block;background:var(--pri2);color:var(--pri);border-radius:999px;padding:2px 10px;font-size:12px;font-weight:600;margin-bottom:10px}
dl{display:grid;grid-template-columns:160px 1fr;gap:10px 16px;margin:0}
dt{color:var(--muted)}dd{margin:0}
footer{background:var(--dark);color:#c9d3dd;padding:40px 0;font-size:14px}
footer .wrap{display:grid;grid-template-columns:1fr 1fr;gap:24px}
footer a{color:#fff}
footer .legal{border-top:1px solid rgba(255,255,255,.12);margin-top:24px;padding-top:16px;grid-column:1/-1;color:#8fa1b3;font-size:13px}
.doc{max-width:820px;margin:0 auto;padding:48px 24px 80px}
.doc h1{font-size:32px;color:var(--dark);margin:0 0 6px}
.doc .meta{color:var(--muted);margin-bottom:32px}
.doc h2{font-size:20px;margin:36px 0 10px}
.doc h3{font-size:16px;margin:24px 0 6px}
.doc ul{padding-left:22px}
.doc table{width:100%;border-collapse:collapse;font-size:15px}
.doc th,.doc td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.doc th{background:var(--bg2)}
.notice{background:var(--pri2);border-left:4px solid var(--pri);padding:12px 16px;border-radius:0 8px 8px 0;margin:16px 0}
.en{display:none}
html[data-lang="en"] .zh{display:none}
html[data-lang="en"] .en{display:revert}
@media (max-width:720px){.hero h1{font-size:30px}nav{display:none}footer .wrap{grid-template-columns:1fr}dl{grid-template-columns:1fr}}