:root{--bg:#fff;--fg:#14202b;--mut:#5b6b79;--line:#e3e8ed;--brand:#0b5fff;--brand-d:#0846c2;--soft:#f4f7fb;--ok:#117a3d;--err:#b42318}
@media (prefers-color-scheme:dark){:root{--bg:#0f1620;--fg:#e7edf3;--mut:#9aa8b5;--line:#243140;--brand:#5b95ff;--brand-d:#7fadff;--soft:#16202c;--ok:#4cc27d;--err:#ff8a80}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--brand)}a:hover{color:var(--brand-d)}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
.narrow{max-width:720px}
header.site{border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{font-weight:700;color:var(--fg);text-decoration:none;font-size:18px}
nav a{margin-left:18px;color:var(--mut);text-decoration:none;font-size:15px}
.hero{padding:64px 0 48px}
.hero h1{font-size:clamp(30px,5vw,46px);line-height:1.15;margin:0 0 16px;letter-spacing:-.02em}
.hero p.lead{font-size:20px;color:var(--mut);max-width:640px;margin:0 0 28px}
.btn{display:inline-block;background:var(--brand);color:#fff;border:0;border-radius:8px;padding:13px 22px;font:600 16px system-ui;text-decoration:none;cursor:pointer}
.btn:hover{background:var(--brand-d);color:#fff}.btn[disabled]{opacity:.6;cursor:wait}
section{padding:44px 0}section.alt{background:var(--soft)}
h2{font-size:28px;line-height:1.25;margin:0 0 18px;letter-spacing:-.01em}h3{margin:24px 0 8px;font-size:20px}
.grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.card{border:1px solid var(--line);border-radius:12px;padding:22px;background:var(--bg)}.card h3{margin-top:0}
.steps{counter-reset:s;list-style:none;padding:0}.steps li{counter-increment:s;padding-left:46px;position:relative;margin:0 0 18px}
.steps li:before{content:counter(s);position:absolute;left:0;top:0;width:32px;height:32px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:700}
form{display:grid;gap:14px;max-width:560px}
label{font-size:14px;font-weight:600;display:grid;gap:6px}
input,textarea{font:inherit;padding:11px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--fg)}
input:focus,textarea:focus{outline:2px solid var(--brand);outline-offset:1px}
.row{display:grid;gap:14px;grid-template-columns:1fr 1fr}@media(max-width:560px){.row{grid-template-columns:1fr}}
.check{display:flex;gap:10px;align-items:flex-start;font-weight:400;font-size:14px;color:var(--mut)}.check input{margin-top:4px}
.hp{position:absolute;left:-9999px;height:0;overflow:hidden}
.msg{padding:12px 14px;border-radius:8px;font-size:15px;display:none}.msg.ok{display:block;background:rgba(17,122,61,.12);color:var(--ok)}.msg.err{display:block;background:rgba(180,35,24,.12);color:var(--err)}
.fe{color:var(--err);font-size:13px;font-weight:400}
.disclose{font-size:14px;color:var(--mut);border-left:3px solid var(--line);padding-left:14px;margin:24px 0}
article h1{font-size:clamp(28px,4.5vw,40px);line-height:1.2;margin:40px 0 12px}
article .meta{color:var(--mut);font-size:14px;margin-bottom:28px}
article p,article li{max-width:68ch}
.cta{background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:22px;margin:36px 0}
footer{border-top:1px solid var(--line);padding:30px 0;font-size:14px;color:var(--mut)}footer a{color:var(--mut)}