:root{--ink:#1d2433;--mut:#5b667a;--bg:#f7f8fa;--acc:#1f5eff;--line:#e3e7ee}
*{box-sizing:border-box}body{margin:0;font:16px/1.65 -apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
header{background:#fff;border-bottom:1px solid var(--line)}.w{max-width:960px;margin:0 auto;padding:0 20px}
nav{display:flex;align-items:center;justify-content:space-between;height:64px}nav b{font-size:1.15rem;letter-spacing:.2px}
nav a{color:var(--mut);text-decoration:none;margin-left:22px}nav a:hover,nav a.on{color:var(--acc)}
.hero{padding:72px 0 56px}.hero h1{font-size:2.4rem;line-height:1.2;margin:0 0 14px}.hero p{max-width:620px;color:var(--mut);font-size:1.1rem}
.btn{display:inline-block;margin-top:18px;padding:11px 22px;background:var(--acc);color:#fff;border-radius:8px;text-decoration:none}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px;padding-bottom:56px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px}.card h3{margin:0 0 8px}.card p{margin:0;color:var(--mut)}
main.t{padding:48px 0}main.t h1{margin-top:0}footer{border-top:1px solid var(--line);color:var(--mut);font-size:.9rem;padding:26px 0;background:#fff}