:root{--bg:#f5f8fc;--card:#fff;--ink:#172033;--muted:#5c677d;--brand:#2867c7;--line:#dfe6f0}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink);line-height:1.65}header{background:#fff;border-bottom:1px solid var(--line)}nav{max-width:920px;margin:auto;padding:18px 22px;display:flex;align-items:center;gap:20px;flex-wrap:wrap}.brand{font-weight:800;font-size:1.15rem;margin-right:auto;color:var(--ink);text-decoration:none}nav a{color:var(--brand);text-decoration:none}main{max-width:920px;margin:40px auto;padding:0 22px}.hero{padding:54px 0 28px}.hero h1{font-size:clamp(2.3rem,7vw,4.5rem);line-height:1.02;margin:0 0 16px}.lead{font-size:1.2rem;color:var(--muted);max-width:720px}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:26px;margin:20px 0;box-shadow:0 8px 28px rgba(23,32,51,.05)}h1,h2,h3{line-height:1.2}h2{margin-top:34px}a{color:var(--brand)}.button{display:inline-block;background:var(--brand);color:white;text-decoration:none;padding:12px 18px;border-radius:12px;font-weight:700}.meta{color:var(--muted);font-size:.95rem}footer{max-width:920px;margin:60px auto 0;padding:26px 22px 50px;color:var(--muted);border-top:1px solid var(--line)}ul{padding-left:24px}@media(max-width:600px){nav{gap:12px}.hero{padding-top:28px}.card{padding:20px}}