:root{--bg:#f7f8fa;--surface:#ffffff;--text:#1d2430;--muted:#5b6573;--line:#e3e7ec;--accent:#2f6fed;--accent-ink:#ffffff;--soft:#e9f0ff;--radius:14px;--shadow:0 1px 2px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.06)}
@media (prefers-color-scheme:dark){:root{--bg:#0f1319;--surface:#171c24;--text:#e8ecf2;--muted:#9aa5b5;--line:#2a313c;--accent:#6b9cff;--accent-ink:#0f1319;--soft:#1d2a44;--shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35)}}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
header{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--text);letter-spacing:.2px}
.brand svg{width:28px;height:28px}
.nav ul{display:flex;gap:22px;list-style:none;margin:0;padding:0}
.nav ul a{color:var(--muted);font-weight:500}.nav ul a:hover{color:var(--text);text-decoration:none}
.hero{padding:72px 0 40px;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.hero h1{font-size:clamp(30px,4.6vw,46px);line-height:1.12;margin:0 0 16px;letter-spacing:-.6px}
.hero p{font-size:18px;color:var(--muted);margin:0 0 26px;max-width:46ch}
.btn{display:inline-block;padding:12px 20px;border-radius:10px;font-weight:600;border:1px solid transparent}
.btn-primary{background:var(--accent);color:var(--accent-ink)}.btn-primary:hover{filter:brightness(1.06);text-decoration:none}
.btn-ghost{border-color:var(--line);color:var(--text);margin-left:10px}.btn-ghost:hover{background:var(--surface);text-decoration:none}
.mock{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}
.mock .row{display:grid;grid-template-columns:28px 1fr auto;gap:12px;align-items:center;padding:10px 8px;border-bottom:1px solid var(--line)}
.mock .row:last-child{border-bottom:0}
.chk{width:20px;height:20px;border-radius:6px;border:2px solid var(--line);display:inline-block}
.chk.done{background:var(--accent);border-color:var(--accent);position:relative}
.chk.done::after{content:"";position:absolute;left:5px;top:1px;width:5px;height:10px;border:solid var(--accent-ink);border-width:0 2px 2px 0;transform:rotate(45deg)}
.tag{font-size:12px;padding:3px 9px;border-radius:999px;background:var(--soft);color:var(--accent);font-weight:600}
.muted{color:var(--muted)}
section{padding:44px 0}
h2{font-size:28px;margin:0 0 8px;letter-spacing:-.3px}
.lead{color:var(--muted);margin:0 0 28px;max-width:62ch}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.card svg{width:28px;height:28px;color:var(--accent);margin-bottom:12px}
.card h3{margin:0 0 6px;font-size:17px}.card p{margin:0;color:var(--muted);font-size:15px}
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.step{position:relative;padding:22px 22px 22px 64px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}
.step::before{counter-increment:s;content:counter(s);position:absolute;left:20px;top:20px;width:30px;height:30px;border-radius:50%;background:var(--soft);color:var(--accent);font-weight:700;display:grid;place-items:center}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:600}.faq p{margin:10px 0 0;color:var(--muted)}
footer{border-top:1px solid var(--line);padding:28px 0;color:var(--muted);font-size:14px}
.foot{display:flex;flex-wrap:wrap;gap:14px 24px;justify-content:space-between;align-items:center}
.foot a{color:var(--muted)}
.prose{max-width:72ch;padding:48px 0 24px}.prose h1{font-size:34px;letter-spacing:-.4px;margin:0 0 10px}.prose h2{font-size:21px;margin:30px 0 8px}.prose p,.prose li{color:var(--text)}
.center{text-align:center;padding:96px 0}
.center h1{font-size:72px;margin:0;letter-spacing:-2px;color:var(--accent)}
@media (max-width:820px){.hero{grid-template-columns:1fr;padding-top:44px}.nav ul{gap:14px}.btn-ghost{margin-left:0;margin-top:10px}}