:root{color-scheme:light;--ink:#172d43;--muted:#526579;--accent:#145bb6;--line:#dce5ee;--paper:#fff;--bg:#f4f7fb}
*{box-sizing:border-box}
html{scroll-padding-top:24px}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.8 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-underline-offset:4px;overflow-wrap:anywhere}
a:hover{text-decoration:underline}
a:focus-visible{outline:3px solid #287aca;outline-offset:5px;border-radius:3px}
.shell{width:min(1040px,calc(100% - 48px));margin-inline:auto}
.site-header{background:var(--paper);border-bottom:1px solid var(--line)}
.site-header>.shell{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-block:18px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:12px;font-weight:750;text-decoration:none;color:var(--ink)}
.brand img{width:36px;height:36px;object-fit:contain;border-radius:8px}
nav{display:flex;gap:20px;flex-wrap:wrap;font-size:14px}
nav a{text-decoration:none}
main.shell{padding-top:44px;padding-bottom:48px}
.hero{padding:8px 0 32px;max-width:780px}
.eyebrow{font-size:12px;font-weight:750;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin:0 0 12px}
h1{font-size:clamp(28px,4.2vw,42px);line-height:1.28;letter-spacing:-.03em;margin:0 0 18px;font-weight:750;overflow-wrap:anywhere}
h2{font-size:23px;line-height:1.45;margin:30px 0 12px;overflow-wrap:anywhere}
h3{font-size:18px;line-height:1.6;margin:24px 0 8px}
p{margin:0 0 16px}
.lead{font-size:18px;color:var(--muted);max-width:740px}
.meta,.muted{font-size:14px;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.panel{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:28px;margin-bottom:24px;min-width:0}
.panel>:first-child{margin-top:0}
.panel>:last-child{margin-bottom:0}
.product-heading{display:flex;align-items:center;gap:16px;margin-bottom:20px}
.product-heading img{width:64px;height:64px;border-radius:14px;object-fit:contain}
.product-heading h2{margin:0;font-size:22px}
.product-heading p{margin:2px 0 0}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.button{display:inline-flex;justify-content:center;align-items:center;min-height:42px;padding:8px 16px;border:1px solid var(--accent);background:var(--accent);color:white;font-size:14px;font-weight:650;text-decoration:none;border-radius:8px}
.button.secondary{background:transparent;color:var(--accent);border-color:var(--line)}
.notice{border-left:3px solid #87add7;padding:16px 20px;background:#eaf1f9;margin:24px 0;color:#405d79;border-radius:0 8px 8px 0}
.document{max-width:880px}
.prose{overflow-wrap:anywhere}
.prose section{margin-block:28px}
.prose ul,.prose ol{padding-left:24px}
.prose li{margin-bottom:10px}
ul,ol{padding-left:24px}
li{margin-bottom:8px}
[lang="en"]{overflow-wrap:anywhere}
#english{padding-top:30px;margin-top:40px;border-top:1px solid var(--line)}
.footer{border-top:1px solid var(--line);padding-block:24px;color:var(--muted);font-size:13px}
.footer p{margin-bottom:8px}
.skip-link{position:absolute;top:-100px;left:16px;padding:10px 16px;background:white;z-index:2}
.skip-link:focus{top:10px}
@media(max-width:640px){.shell{width:calc(100% - 32px)}main.shell{padding-top:30px}.grid{grid-template-columns:1fr;gap:0}.panel{padding:20px}.site-header>.shell{gap:12px;padding-block:14px}nav{gap:14px}.lead{font-size:17px}.product-heading img{width:52px;height:52px}.actions{gap:8px}.button{padding-inline:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}