:root{
  --bg:#f3f7fb;--muted:#eef3f8;--ink:#0e1b26;--sub:#5c6b78;--pri:#1f3b57;--acc:#3aa0ff;--white:#fff;
  --radius:16px;--shadow:0 8px 24px rgba(5,27,50,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);font:16px/1.55 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Arial}
img{max-width:100%;height:auto;display:block}
.container{max-width:1100px;margin:0 auto;padding:0 16px}
.site-header{position:sticky;top:0;background:rgba(255,255,255,.9);backdrop-filter:saturate(1.2) blur(6px);border-bottom:1px solid #e6eef5;z-index:10}
.header-grid{display:flex;align-items:center;justify-content:space-between;min-height:64px}
.logo{display:flex;gap:10px;align-items:center;text-decoration:none;color:var(--pri);font-weight:700}
.nav a{margin-left:16px;text-decoration:none;color:var(--pri);font-weight:600}
.nav .btn{margin-left:12px}
.hero{background:linear-gradient(180deg,#eaf3ff 0%,#ffffff 100%)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:center;padding:48px 0}
h1,h2,h3{line-height:1.2;margin:0 0 10px}
h1{font-size:38px}h2{font-size:28px;margin-bottom:16px}h3{font-size:20px}
.accent{color:var(--acc)}
.hero-bullets{margin:12px 0 0;padding-left:18px;color:var(--sub)}
.section{padding:48px 0}
.section--muted{background:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}
.btn{display:inline-block;background:var(--pri);color:#fff;text-decoration:none;padding:12px 18px;border-radius:12px;box-shadow:var(--shadow);font-weight:700;border:0}
.btn--ghost{background:transparent;color:var(--pri);border:2px solid var(--pri)}
.btn--sm{padding:8px 12px;border-radius:10px;font-size:14px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;align-items:center}
.product{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}
.specs{margin:0 0 12px;padding-left:18px;color:var(--sub)}
.note{margin-top:12px;color:var(--sub)}
.list{padding-left:18px;margin:0;color:var(--sub)}
.form{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.form-grid .wide{grid-column:1/-1}
label{display:grid;gap:6px;font-weight:600}
input,textarea,select{width:100%;padding:10px 12px;border:1px solid #cfd9e3;border-radius:12px;background:#fff}
.form-note{color:var(--sub);font-size:14px}
.site-footer{border-top:1px solid #e6eef5;padding:18px 0;background:#fafcff}
.foot-grid{display:flex;justify-content:space-between;align-items:center}
.foot-nav a{margin-left:16px;color:var(--pri);text-decoration:none}
.muted{color:var(--sub)}
.brief{display:grid;gap:6px;padding-left:18px}
.link{color:var(--acc);text-decoration:none}
@media (max-width:960px){
  .hero-grid,.grid-3,.grid-2,.cards{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  h1{font-size:30px}
}