:root{
  --accent:#0bb;
  --dark:#102027;
  --muted:#6b7280;
  --bg:#fff;
}
*{box-sizing:border-box}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial;line-height:1.5;color:var(--dark);background:var(--bg);margin:0}
.wrap{max-width:1000px;margin:0 auto;padding:20px}
.site-header{background:#f8fafb;border-bottom:1px solid #e6eef0;position:sticky;top:0;z-index:50}
.site-header .wrap{display:flex;align-items:center;gap:12px}
.brand{font-weight:700;color:var(--dark);text-decoration:none;font-size:18px}
.main-nav{margin-left:auto;display:flex;gap:12px;align-items:center}
.main-nav a{color:var(--dark);text-decoration:none;padding:8px 10px;border-radius:6px}
.main-nav a.cta{background:var(--accent);color:#fff}
.nav-toggle{display:none;background:none;border:0;font-size:20px;margin-left:auto}
.hero{padding:48px 0;text-align:center}
.hero h1{font-size:28px;margin:0 0 8px}
.hero p{color:var(--muted);margin:0 0 18px}
.big-cta{background:var(--accent);color:#fff;padding:12px 18px;border-radius:8px;text-decoration:none;margin-right:10px}
.outline{border:1px solid #ccd; padding:10px 16px;border-radius:8px;text-decoration:none;color:var(--dark)}
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:32px 0}
.features article{background:#fbfeff;padding:18px;border-radius:8px;border:1px solid #eef6f7}
.howto{background:#fcfffe;padding:18px;border-radius:6px;border:1px solid #eef6f7;margin-bottom:30px}
.product-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-top:18px}
.card{border:1px solid #e9f2f3;padding:14px;border-radius:8px;text-align:center;background:#fff}
.card img{width:100%;height:160px;object-fit:cover;border-radius:6px;background:#f3f6f7}
.card h3{margin:12px 0 6px;font-size:18px}
.card p{color:var(--muted);margin:0 0 12px}
.btn{display:inline-block;padding:10px 14px;background:var(--accent);color:#fff;border-radius:8px;text-decoration:none}
.note{color:var(--muted);margin-top:10px;font-size:14px}
.site-footer{border-top:1px solid #e6eef0;background:#fbfdff;margin-top:40px}
.site-footer .wrap{display:flex;justify-content:space-between;align-items:center;padding:14px 20px}
.contact-box{background:#fff;padding:16px;border-radius:8px;border:1px solid #eef6f7;margin-top:12px}
@media(max-width:800px){
  .features{grid-template-columns:1fr}
  .nav-toggle{display:block}
  .main-nav{position:fixed;right:12px;top:58px;background:#fff;padding:12px;border-radius:8px;box-shadow:0 6px 22px rgba(0,0,0,.06);display:none;flex-direction:column}
  .main-nav.show{display:flex}
}