:root{--blue:#0067c0;--blue-d:#005a9e;--text:#1a1a1a;--mute:#5d5d5d;--line:#e0e0e0;--bg2:#f3f3f3}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.5 "Segoe UI","Segoe UI Variable Text",system-ui,-apple-system,Arial,sans-serif;color:var(--text);background:#fff}
a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.w{max-width:1084px;margin:0 auto;padding:0 24px}
/* top bar */
.utility{background:#fff;border-bottom:1px solid var(--line);font-size:12px}
.utility .w{display:flex;justify-content:flex-end;gap:20px;height:36px;align-items:center}
.utility a{color:var(--text)}
.hdr{position:sticky;top:0;z-index:10;background:#fff;border-bottom:1px solid var(--line)}
.hdr .w{display:flex;align-items:center;height:54px;gap:28px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:600;font-size:18px}
.brand:hover{text-decoration:none}.brand img{width:24px;height:24px}
.hdr nav{display:flex;gap:4px;flex:1}
.hdr nav a{color:var(--text);font-size:14px;padding:6px 10px}
.hdr nav a[aria-current]{border-bottom:2px solid var(--blue)}
.btn{display:inline-block;padding:10px 22px;border:1px solid var(--blue);background:var(--blue);color:#fff;font-size:15px;border-radius:4px}
.btn:hover{background:var(--blue-d);text-decoration:none}
.btn.o{background:#fff;color:var(--blue)}
.btn.o:hover{background:#f0f6fc}
/* hero */
.hero{background:var(--bg2);padding:56px 0 0;overflow:hidden}
.hero h1{font-size:46px;line-height:1.15;font-weight:600;margin:0 0 14px;max-width:640px}
.hero p{font-size:20px;margin:0 0 24px;max-width:600px;color:#333}
.hero .cta{display:flex;gap:12px;margin-bottom:40px}
.hero img{margin:0 auto;border-radius:8px 8px 0 0;box-shadow:0 8px 30px rgba(0,0,0,.18);max-width:880px;width:100%}
/* sections */
section{padding:64px 0}
section.g{background:var(--bg2)}
h2{font-size:32px;font-weight:600;margin:0 0 12px;line-height:1.25}
h3{font-size:20px;font-weight:600;margin:0 0 6px}
.lead{font-size:18px;color:#333;margin:0 0 20px;max-width:640px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.row.r .t{order:2}
.row img{border:1px solid var(--line);border-radius:8px;box-shadow:0 4px 18px rgba(0,0,0,.1)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:28px}
.card{background:#fff;border:1px solid var(--line);padding:24px;border-radius:8px}
.g .card{border-color:#ddd}
.card p{margin:0;color:var(--mute);font-size:15px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;counter-reset:s;margin-top:28px}
.step{counter-increment:s}
.step:before{content:counter(s);display:grid;place-items:center;width:36px;height:36px;border-radius:50%;background:var(--blue);color:#fff;font-weight:600;margin-bottom:12px}
.step p{color:var(--mute);margin:0}
.dl{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:24px}
.dl .card .meta{font-size:13px;color:var(--mute);margin:8px 0 16px}
table{border-collapse:collapse;width:100%;margin:16px 0}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);font-size:15px}
th{background:var(--bg2);font-weight:600}
.ok{color:#107c10}.mid{color:#9d5d00}.no{color:#a4262c}
code,pre{font:13px Consolas,"Cascadia Mono",monospace;background:var(--bg2);border-radius:3px}
code{padding:1px 5px}pre{padding:14px;overflow:auto}
details{border-bottom:1px solid var(--line);padding:14px 0}
summary{cursor:pointer;font-weight:600;font-size:17px}
details p{margin:10px 0 0;color:#333}
.doc{display:grid;grid-template-columns:200px 1fr;gap:40px}
.toc{position:sticky;top:80px;align-self:start;display:flex;flex-direction:column;gap:8px;font-size:14px}
.prose h2{margin-top:36px;font-size:26px}
/* footer */
footer{background:var(--bg2);border-top:1px solid var(--line);padding:36px 0 24px;font-size:13px}
.fcols{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.fcols h4{margin:0 0 10px;font-size:14px}
.fcols a{display:block;color:#333;padding:3px 0}
.legal{margin-top:28px;color:var(--mute);border-top:1px solid var(--line);padding-top:16px}
@media(max-width:800px){.row,.cards,.steps,.dl,.fcols,.doc{grid-template-columns:1fr}.row.r .t{order:0}.hero h1{font-size:34px}.hdr nav{display:none}}