:root{
  --ink:#17191b;
  --muted:#6a7179;
  --line:#e8edf3;
  --gold1:#c28c1f; --gold2:#f2c64f; --gold3:#fff4c4; --gold4:#b27a10;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;font:16px/1.6 Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);background:#ffffff}
img{max-width:100%;display:block}
.wrap{width:min(1180px,92vw);margin:0 auto}

.topbar{position:sticky;top:0;z-index:10;background:#fff;border-bottom:1px solid var(--line)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;padding:10px 0;gap:20px}
.logo{height:40px}
nav a{color:#17191b;text-decoration:none;font-weight:700;margin:0 10px}
nav a.cta{padding:6px 12px;border:1px solid #111;border-radius:10px}
nav a:hover{opacity:.8}

/* HERO: white/steel glossy with ultra subtle motion */
.hero{
  position:relative;min-height:72vh;display:flex;align-items:center;overflow:hidden;
  background:url('assets/steel_bg.jpg') center/cover no-repeat;
}
.hero-gloss{
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(1200px 400px at 10% 10%, rgba(255,255,255,.14), rgba(255,255,255,0)),
    linear-gradient(120deg, rgba(255,255,255,.10), rgba(255,255,255,0) 40%);
  mix-blend-mode:screen;
}
.hero-film{
  position:absolute;inset:-5%;background:url('assets/hero_layer.jpg') center/cover no-repeat;
  opacity:.06;transform:scale(1);animation:heroZoom 28s ease-in-out infinite alternate;
}
@keyframes heroZoom{
  from{transform:scale(1)}
  to{transform:scale(1.05)}
}
.hero-inner{position:relative;z-index:1;padding:70px 0}
.tag{font-size:clamp(28px,3.6vw,46px);line-height:1.15;margin:0;color:var(--ink)}
.tag .gold{background:linear-gradient(92deg,var(--gold1),var(--gold2) 45%,var(--gold3) 55%,var(--gold4));-webkit-background-clip:text;background-clip:text;color:transparent}
.tag .carbon{background:linear-gradient(180deg,#0f1012,#1e2125 60%, #0f1113);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{max-width:760px;margin-top:10px}
.btn{display:inline-block;margin-top:16px;padding:12px 18px;border-radius:10px;border:1px solid rgba(0,0,0,.06);background:#111;color:#fff;font-weight:700;text-decoration:none}

/* Parallax steel band */
.band.parallax{
  height:200px;background:url('assets/steel_bg.jpg') center/cover fixed no-repeat;
  filter:brightness(1.02) saturate(1.02);
}

.section{padding:66px 0;border-top:1px solid var(--line)}
h2{margin:0 0 14px;color:var(--ink)}

.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 10px 24px rgba(0,0,0,.05);transition:transform .35s ease}
.card:hover{transform:translateY(-4px)}
.card .img{overflow:hidden}
.card img{width:100%;height:320px;object-fit:cover;transition:transform 3s ease}
.card:hover img{transform:scale(1.04)}
.card h3{margin:12px 16px 8px}
.card p{margin:0 16px 16px;color:var(--muted)}

.list{padding-left:18px}
.list.two-col{columns:2;column-gap:32px}
.list.two-col li{break-inside:avoid;margin-bottom:8px}

.rfq .form{display:grid;grid-template-columns:1fr 1fr;gap:12px;max-width:780px}
.rfq .form textarea{grid-column:1/-1}
.rfq input,.rfq textarea{padding:12px;border:1px solid var(--line);border-radius:10px;background:#fff}

.contact{position:relative;padding:66px 0;background:#f8fafc;overflow:hidden}
.contact .contact-wm{position:absolute;inset:0;background:
  url('assets/contact_pin.jpg') center/cover no-repeat;
}
.contact .contact-wm::after{
  content:"";position:absolute;inset:0;background:url('assets/contact_network.jpg') center/cover no-repeat;opacity:.12;mix-blend-mode:overlay
}
.contact .wrap{position:relative;z-index:1}
.contact p{margin:6px 0;font-weight:600}

.foot{padding:24px 0;border-top:1px solid var(--line);color:#5d6670;text-align:center}

@media (max-width:980px){
  .grid4{grid-template-columns:repeat(2,1fr)}
  .card img{height:260px}
  .list.two-col{columns:1}
}
@media (max-width:560px){
  .grid4{grid-template-columns:1fr}
  .card img{height:220px}
}