*{box-sizing:border-box}:root{--ink:#14171c;--soft:#5b6270;--line:#e3e5e9;--bg:#fbfbf9;--acc:#1f4fd1}
body{margin:0;font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--acc)}.w{max-width:960px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line);background:#fff}header .w{display:flex;justify-content:space-between;align-items:center;height:64px;gap:16px}
.logo{display:flex;align-items:center}.logo img{height:44px;width:auto;display:block}nav a{margin-left:18px;text-decoration:none;color:var(--soft);font-size:15px}
.hero{padding:72px 20px 48px}.hero h1{font-size:clamp(32px,5vw,50px);line-height:1.1;margin:0 0 18px;letter-spacing:-.02em}.hero p{font-size:20px;color:var(--soft);max-width:640px}
.btn{display:inline-block;background:var(--acc);color:#fff;padding:13px 22px;border-radius:8px;text-decoration:none;font-weight:600;margin-top:12px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;padding:24px 20px 48px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px}.card h3{margin:0 0 8px}
main.doc{padding:48px 20px 64px;max-width:820px}main.doc h1{font-size:34px}main.doc h2{font-size:21px;margin-top:32px}
footer{border-top:1px solid var(--line);background:#fff;font-size:14px;color:var(--soft);padding:28px 0}footer a{color:var(--soft);margin-right:14px}
@media(max-width:620px){nav a{margin-left:10px;font-size:14px}}