:root{
  --blue:#0C447C; --blue-d:#042C53; --blue-m:#185FA5; --blue-l:#E6F1FB;
  --orange:#D85A30; --orange-d:#993C1D;
  --ink:#1F2733; --muted:#5F6B7A; --line:#E4E7EC; --bg:#FFFFFF; --bg2:#F6F8FB;
  --radius:10px; --maxw:1140px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI",-apple-system,Arial,Helvetica,sans-serif;color:var(--ink);line-height:1.65;background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
h1,h2,h3,h4{font-weight:600;line-height:1.25}
h2{font-size:30px;letter-spacing:-.01em}
h3{font-size:18px}
p{color:var(--muted)}
.kicker{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--orange);margin-bottom:12px}
.lead{font-size:16.5px;max-width:760px;color:var(--muted)}
section{padding:72px 0}
section.tint{background:var(--bg2)}
.sec-head{margin-bottom:40px}

/* buttons */
.btn{display:inline-block;padding:13px 26px;border-radius:6px;font-weight:600;font-size:15px;transition:.2s;border:1.5px solid transparent;cursor:pointer}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-d)}
.btn-outline{border-color:var(--blue);color:var(--blue)}
.btn-outline:hover{background:var(--blue);color:#fff}
.btn-light{border-color:rgba(255,255,255,.55);color:#fff}
.btn-light:hover{background:rgba(255,255,255,.12)}
.btn + .btn{margin-left:12px}

/* header */
header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;color:var(--blue-d)}
.brand .mark{width:34px;height:38px;border-radius:0;background:none;color:#fff;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;flex:0 0 auto}
.brand .mark img{width:100%;height:100%;object-fit:contain}
.brand span{color:var(--orange)}
.menu{display:flex;align-items:center;gap:22px;list-style:none}
.menu a{font-size:15px;font-weight:500;color:var(--ink);padding:6px 0;border-bottom:2px solid transparent}
.menu a:hover,.menu a.active{color:var(--orange);border-bottom-color:var(--orange)}
.nav .btn{padding:10px 20px;font-size:14.5px}
.burger{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:6px;background:#fff;cursor:pointer;position:relative}
.burger i{position:absolute;left:10px;right:10px;height:2px;background:var(--ink);border-radius:2px}
.burger i:nth-child(1){top:13px}.burger i:nth-child(2){top:19px}.burger i:nth-child(3){top:25px}

/* hero */
.hero{background:linear-gradient(115deg,rgba(4,44,83,.94) 0%,rgba(12,68,124,.88) 60%,rgba(12,68,124,.78) 100%);color:#fff;padding:34px 0 64px}
.hero h1{font-size:44px;max-width:820px;margin-bottom:18px;letter-spacing:-.015em}
.hero p{font-size:17.5px;max-width:660px;color:#CFDCEB;margin-bottom:30px}
.hero .actions{margin-bottom:52px}
.hero-facts{display:grid;grid-template-columns:repeat(4,1fr);gap:2px;background:rgba(255,255,255,.16);border-radius:10px;overflow:hidden}
.hf{background:rgba(4,44,83,.35);padding:20px 22px}
.hf b{display:block;font-size:26px;color:#fff;line-height:1.2}
.hf span{font-size:13px;color:#AFC4DA}

/* page hero (inner pages) */
.page-hero{background:var(--blue-d);color:#fff;padding:54px 0}
.page-hero h1{font-size:34px;margin-bottom:8px}
.page-hero p{color:#A9BFD6;font-size:16px;max-width:680px}
.crumb{font-size:13px;color:#8AA3BC;margin-bottom:14px}
.crumb a:hover{color:#fff}

/* stats row */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px}
.stat b{display:block;font-size:30px;color:var(--blue);line-height:1.2}
.stat span{font-size:13.5px;color:var(--muted)}

/* product grid */
.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.22s;display:flex;flex-direction:column}
.pcard:hover{transform:translateY(-3px);box-shadow:0 10px 28px rgba(12,68,124,.10);border-color:#CBD8E6}
.pcard .top{height:96px;display:flex;align-items:flex-end;justify-content:space-between;padding:16px 18px;color:#fff}
.pcard .top b{font-size:15px;font-weight:600}
.tier{font-size:10.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:3px 9px;border-radius:99px;background:rgba(255,255,255,.9);color:var(--blue-d)}
.pcard .body{padding:18px;flex:1;display:flex;flex-direction:column}
.pcard .body h3{font-size:16px;margin-bottom:6px}
.pcard .body p{font-size:13.5px;flex:1}
.pcard .spec{margin-top:14px;padding-top:12px;border-top:1px dashed var(--line);font-size:12.5px;color:var(--blue-m);font-weight:600}

/* split layout */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:start}
.adv{display:flex;gap:16px;padding-bottom:24px}
.adv .n{flex:0 0 34px;height:34px;border-radius:50%;background:var(--blue-l);color:var(--blue);font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:center}
.adv h3{font-size:16.5px;margin-bottom:4px}
.adv p{font-size:14px}

.chainbox{background:var(--blue-d);color:#fff;border-radius:12px;padding:30px 30px 26px}
.chainbox h3{color:#fff;font-size:17px;margin-bottom:6px}
.chainbox .cs{font-size:13px;color:#9FB8D0;margin-bottom:18px}
.chain .node{display:flex;gap:14px;padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.2);font-size:14px}
.chain .node:last-child{border-bottom:0}
.chain .node b{flex:0 0 26px;height:26px;border-radius:50%;background:var(--orange);font-size:12.5px;display:flex;align-items:center;justify-content:center}
.chain .node small{display:block;color:#A3BAD0;font-size:12.5px}

/* certs */
.certs{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.cert{border:1px solid var(--line);background:#fff;border-radius:8px;padding:20px;text-align:center}
.cert b{display:block;font-size:15px;color:var(--blue);margin-bottom:3px}
.cert span{font-size:12.5px;color:var(--muted)}

/* table */
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{width:100%;border-collapse:collapse;font-size:14px;min-width:680px}
th{background:var(--bg2);text-align:left;font-weight:600;font-size:13px;color:var(--blue-d);padding:13px 16px;border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:13px 16px;border-bottom:1px solid var(--line);color:var(--muted);vertical-align:top}
td:first-child{color:var(--ink);font-weight:600;white-space:nowrap}
tr:last-child td{border-bottom:0}

/* product detail blocks */
.pblock{border-top:1px solid var(--line);padding:56px 0}
.pblock:first-of-type{border-top:0;padding-top:56px}
.pblock .pt{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;margin-bottom:14px}
.pblock .pt h2{font-size:26px}
.pblock .pt .tier{background:var(--blue-l);color:var(--blue)}
.pblock .pbody{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.pblock ul{list-style:none;font-size:14.5px;color:var(--muted)}
.pblock li{padding-left:20px;position:relative;margin-bottom:7px}
.pblock li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--orange)}
.mini{font-size:13px;color:var(--blue-m);font-weight:600;margin-top:16px;text-transform:uppercase;letter-spacing:.06em}

/* form */
.rfq{display:grid;grid-template-columns:1fr 1.05fr;gap:56px;align-items:start}
.form{background:#fff;border:1px solid var(--line);border-radius:12px;padding:30px}
.fg{margin-bottom:16px}
.fg label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--ink)}
.fg input,.fg select,.fg textarea{width:100%;padding:11px 14px;border:1px solid #D8DEE7;border-radius:6px;font-size:14.5px;font-family:inherit;background:#fff;color:var(--ink)}
.fg input:focus,.fg select:focus,.fg textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(12,68,124,.10)}
.fg.two{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form .btn{width:100%;font-size:15.5px}
.note{font-size:12.5px;color:var(--muted);margin-top:12px}
.okmsg{display:none;background:#EAF3DE;border:1px solid #97C459;color:#27500A;padding:12px 16px;border-radius:8px;font-size:14px;margin-bottom:16px}
.touch .row{margin-bottom:16px;font-size:14.5px;color:var(--muted)}
.touch .row b{display:block;color:var(--ink);font-size:13px;text-transform:uppercase;letter-spacing:.06em;margin-bottom:2px;font-weight:700}

/* faq */
.faq details{border-bottom:1px solid var(--line);padding:18px 0}
.faq summary{font-weight:600;font-size:15.5px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:20px;color:var(--blue);font-weight:400;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq p{font-size:14.5px;margin-top:10px}

/* footer */
footer{background:var(--blue-d);color:#93AAC2;padding:56px 0 24px;font-size:14px}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;margin-bottom:40px}
footer h4{color:#fff;font-size:14px;text-transform:uppercase;letter-spacing:.08em;margin-bottom:14px}
footer ul{list-style:none}
footer li{margin-bottom:8px}
footer a:hover{color:#fff}
.fbottom{border-top:1px solid rgba(255,255,255,.14);padding-top:20px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:#7E97B0}

@media(max-width:960px){
  .hero h1{font-size:32px}
  .hero-facts,.stats,.certs{grid-template-columns:1fr 1fr}
  .pgrid{grid-template-columns:1fr 1fr}
  .split,.rfq,.pblock .pbody,.fgrid{grid-template-columns:1fr}
  .fg.two{grid-template-columns:1fr}
  h2{font-size:24px}
  .menu{gap:14px}
  .menu a{font-size:13.5px}
}
@media(max-width:640px){
  .menu{display:none}
  .burger{display:block}
  .nav.open .menu{display:flex;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;gap:0;padding:8px 24px 20px;border-bottom:1px solid var(--line);align-items:flex-start}
  .nav.open .menu li{width:100%;padding:10px 0;border-bottom:1px solid var(--line)}
  .hero{padding:60px 0 48px}
  .hero h1{font-size:27px}
  .hero-facts,.stats,.certs,.pgrid{grid-template-columns:1fr}
  .btn + .btn{margin-left:0;margin-top:10px}
  .nav .btn{display:none}
  section{padding:52px 0}
}

/* ---------- hero banner ---------- */
.banner-wrap{position:relative}
.banner-wrap::after{content:'';position:absolute;left:0;right:0;bottom:0;height:90px;background:linear-gradient(to bottom,rgba(4,44,83,0),rgba(4,44,83,.55) 55%,rgba(4,44,83,1))}
.hero-banner{display:block;width:100%;height:auto}

/* ---------- product photography (AI placeholder, replace with real shots) ---------- */
.pcard .pimg{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;background:var(--blue-l);border-bottom:1px solid var(--line)}
.pcard .top{height:auto;padding:12px 18px}
.pblock .pmedia{float:right;width:320px;margin:0 0 20px 34px}
.pblock .pmedia img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius);border:1px solid var(--line);background:var(--blue-l)}
@media(max-width:960px){
  .pblock .pmedia{float:none;width:100%;max-width:420px;margin:0 0 20px}
}