:root{--bg:#f8fafc;--ink:#0f172a;--muted:#64748b;--brand:#2563eb;--brand-d:#1d4ed8;--card:#fff;--line:#e2e8f0}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.55}
a{color:var(--brand)}.w{max-width:1040px;margin:0 auto;padding:0 18px}
header.top{position:sticky;top:0;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:5}
header.top .w{display:flex;align-items:center;justify-content:space-between;height:56px}.logo{font-weight:800;font-size:20px;color:var(--ink);text-decoration:none}
.btn{display:inline-block;padding:13px 22px;border-radius:12px;background:var(--brand);color:#fff;text-decoration:none;font-weight:600;border:0;font-size:16px}.btn:hover{background:var(--brand-d)}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}.btn.sm{padding:9px 16px;font-size:14px}
.hero{padding:56px 0 40px;text-align:center}.hero h1{font-size:clamp(30px,6vw,52px);line-height:1.1;margin:0 0 16px;letter-spacing:-.02em}
.hero p{font-size:clamp(16px,2.4vw,20px);color:var(--muted);max-width:640px;margin:0 auto 26px}.note{color:var(--muted);font-size:14px;margin-top:10px}
section{padding:44px 0}h2{font-size:clamp(24px,4vw,34px);margin:0 0 8px;text-align:center;letter-spacing:-.01em}.sub{text-align:center;color:var(--muted);margin:0 0 28px}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px}
.step .n{width:36px;height:36px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;margin-bottom:10px}
.card h3{margin:0 0 6px;font-size:18px}.card p{margin:0;color:var(--muted);font-size:15px}.ico{font-size:28px;margin-bottom:8px}
.price{font-size:32px;font-weight:800;margin:6px 0}.price small{font-size:14px;font-weight:500;color:var(--muted)}.tcard ul{padding:0;margin:14px 0 18px;list-style:none;font-size:14.5px}.tcard li{padding:4px 0}.tcard li:before{content:"✓ ";color:#16a34a;font-weight:700}
.tcard.hl{border:2px solid var(--brand);box-shadow:0 10px 30px rgba(37,99,235,.12)}.tag{display:inline-block;font-size:12px;background:#dbeafe;color:#1e40af;padding:2px 10px;border-radius:99px;margin-left:6px;vertical-align:middle}
.demo a{text-decoration:none;color:inherit;display:block}.demo b{display:block}.demo span{color:var(--brand);font-size:14px}
details{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 18px;margin-bottom:10px}summary{font-weight:600;cursor:pointer}details p{margin:10px 0 0;color:var(--muted)}
.cta{text-align:center;background:var(--ink);color:#fff;border-radius:22px;padding:40px 20px;margin:20px 0}.cta h2{color:#fff}.cta p{color:#cbd5e1}
footer{border-top:1px solid var(--line);padding:28px 0 40px;color:var(--muted);font-size:14px}footer .cols{display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between}footer a{color:var(--muted)}