:root{
  --navy:#071e36;
  --navy2:#0d3b66;
  --blue:#1a5c8a;
  --gold:#c9a24b;
  --gold-l:#e0bd6a;
  --ink:#1c2733;
  --gray:#5a6b7a;
  --lgray:#eef2f6;
  --lgray2:#f6f8fa;
  --white:#ffffff;
  --red:#c0392b;
  --shadow:0 10px 30px rgba(7,30,54,.08);
  --shadow-h:0 18px 45px rgba(7,30,54,.16);
  --r:8px;
  --t:.35s cubic-bezier(.22,.68,.35,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Inter","Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);line-height:1.75;background:var(--white);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--gold)}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.btn{
  display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:15px;
  padding:14px 30px;border-radius:50px;border:none;cursor:pointer;
  transition:all var(--t);text-decoration:none;letter-spacing:.3px;
}
.btn-primary{background:var(--gold);color:#fff;box-shadow:0 8px 20px rgba(201,162,75,.35)}
.btn-primary:hover{background:var(--gold-l);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(201,162,75,.45)}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.6)}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.1);color:#fff;transform:translateY(-2px)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--blue);color:#fff;transform:translateY(-2px)}
section{padding:90px 0}
.sec-head{text-align:center;max-width:760px;margin:0 auto 56px}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:3px;
  text-transform:uppercase;color:var(--gold);margin-bottom:14px;
}
.sec-head h2{
  font-size:38px;line-height:1.25;color:var(--navy);font-weight:800;letter-spacing:-.5px;
}
.sec-head p{color:var(--gray);margin-top:16px;font-size:16px}
.section-sub{color:var(--gray);margin-top:16px;font-size:16px;text-align:center;max-width:760px;margin-left:auto;margin-right:auto}

/* ===== Top bar ===== */
.topbar{
  background:var(--navy);color:#c9d6e2;font-size:13px;padding:9px 0;
  border-bottom:1px solid rgba(255,255,255,.07);
}
.topbar .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px}
.topbar a{color:#c9d6e2}
.topbar a:hover{color:var(--gold-l)}
.topbar .tb-l{display:flex;gap:22px;flex-wrap:wrap}
.topbar .tb-l span{display:inline-flex;align-items:center;gap:6px}
.topbar i{font-style:normal;color:var(--gold)}

/* ===== Header ===== */
header{
  position:sticky;top:0;z-index:200;background:rgba(255,255,255,.97);
  backdrop-filter:blur(10px);border-bottom:1px solid #eef1f4;transition:box-shadow var(--t);
}
header.scrolled{box-shadow:var(--shadow)}
.h-inner{display:flex;align-items:center;justify-content:space-between;height:78px}
.logo{display:flex;align-items:center;gap:12px}
.logo img{width:46px;height:46px;border-radius:10px}
.logo b{font-size:19px;color:var(--navy);letter-spacing:-.3px;line-height:1.15}
.logo small{display:block;font-size:11px;color:var(--gray);font-weight:500;letter-spacing:1px;text-transform:uppercase}
nav ul{display:flex;gap:6px;align-items:center}
nav a{
  display:block;padding:10px 16px;font-size:15px;font-weight:600;color:var(--ink);
  border-radius:8px;position:relative;
}
nav a:hover{color:var(--navy);background:var(--lgray2)}
nav a.active{color:var(--gold)}
.h-cta{display:flex;align-items:center;gap:14px}
.h-phone{font-weight:700;color:var(--navy);font-size:15px;white-space:nowrap}
.h-phone small{display:block;font-size:11px;color:var(--gray);font-weight:500}
.menu-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.menu-toggle span{width:24px;height:2px;background:var(--navy);border-radius:2px;transition:var(--t)}

/* ===== Hero ===== */
.hero{position:relative;min-height:620px;display:flex;align-items:center;overflow:hidden}
.hero .bg{position:absolute;inset:0;z-index:0}
.hero .bg img{width:100%;height:100%;object-fit:cover}
.hero .bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(7,30,54,.94) 0%,rgba(13,59,102,.86) 45%,rgba(13,59,102,.55) 100%);
}
.hero .container{position:relative;z-index:1;color:#fff}
.hero .badge{
  display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.25);padding:8px 18px;border-radius:50px;
  font-size:13px;letter-spacing:1px;backdrop-filter:blur(4px);margin-bottom:24px;
}
.hero .badge i{color:var(--gold-l);font-style:normal}
.hero h1{
  font-size:58px;line-height:1.12;font-weight:800;letter-spacing:-1.5px;max-width:760px;
}
.hero h1 em{font-style:normal;color:var(--gold-l)}
.hero p{font-size:18px;color:#d7e4f0;max-width:600px;margin:22px 0 34px}
.hero .h-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero .trust{display:flex;gap:44px;flex-wrap:wrap;margin-top:54px;padding-top:34px;border-top:1px solid rgba(255,255,255,.16)}
.hero .trust div span{display:block;font-size:34px;font-weight:800;color:#fff}
.hero .trust div small{color:#a9c6de;font-size:13px;letter-spacing:.5px}

/* ===== General blocks ===== */
.cards{display:grid;gap:28px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.bg-soft{background:var(--lgray2)}
.card{
  background:#fff;border-radius:14px;padding:38px 32px;border:1px solid #eef1f4;
  transition:all var(--t);height:100%;
}
.card:hover{transform:translateY(-8px);box-shadow:var(--shadow-h);border-color:#e2e8ee}
.card .ico{
  width:62px;height:62px;border-radius:14px;background:rgba(13,59,102,.07);
  display:flex;align-items:center;justify-content:center;margin-bottom:22px;
  font-size:26px;color:var(--blue);
}
.card h3{font-size:20px;color:var(--navy);margin-bottom:12px;font-weight:700}
.card p{color:var(--gray);font-size:15px}

/* ===== About preview ===== */
.about-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:64px;align-items:center}
.about-grid .img{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--shadow)}
.about-grid .img img{border-radius:16px;transition:transform .8s}
.about-grid .img:hover img{transform:scale(1.05)}
.about-grid .img .badge-abs{
  position:absolute;left:22px;bottom:22px;background:var(--gold);color:#fff;
  padding:14px 20px;border-radius:12px;font-weight:700;box-shadow:var(--shadow-h);
}
.about-grid .img .badge-abs small{display:block;font-size:12px;font-weight:500;opacity:.9}
.about-txt h2{font-size:36px;color:var(--navy);font-weight:800;line-height:1.25;margin-bottom:18px}
.about-txt p{color:var(--gray);margin-bottom:16px}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:30px 0}
.stat{background:var(--lgray2);border-radius:12px;padding:20px;text-align:center}
.stat b{display:block;font-size:30px;color:var(--gold);font-weight:800}
.stat span{font-size:13px;color:var(--gray)}

/* ===== Product card ===== */
.prod-card{
  background:#fff;border-radius:14px;overflow:hidden;border:1px solid #eef1f4;
  transition:all var(--t);display:flex;flex-direction:column;
}
.prod-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-h)}
.prod-card .thumb{position:relative;aspect-ratio:4/3;overflow:hidden}
.prod-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .8s}
.prod-card:hover .thumb img{transform:scale(1.08)}
.prod-card .tag{
  position:absolute;top:14px;left:14px;background:var(--navy);color:#fff;
  font-size:11px;font-weight:700;padding:5px 12px;border-radius:50px;letter-spacing:1px;
}
.prod-card .body{padding:24px;flex:1;display:flex;flex-direction:column}
.prod-card h3{font-size:19px;color:var(--navy);font-weight:700;margin-bottom:10px}
.prod-card p{color:var(--gray);font-size:14px;flex:1}
.prod-card .more{
  margin-top:18px;display:inline-flex;align-items:center;gap:6px;font-weight:700;
  color:var(--gold);font-size:14px;
}
.center{text-align:center}

/* ===== Scope / application ===== */
.scope-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.scope-grid .item{
  background:#fff;border:1px solid #eef1f4;border-radius:12px;padding:20px 16px;text-align:center;
  transition:all var(--t);font-size:15px;color:var(--ink);font-weight:600;
}
.scope-grid .item:hover{border-color:var(--gold);color:var(--navy);transform:translateY(-4px);box-shadow:var(--shadow)}
.scope-grid .item span{display:block;font-size:26px;margin-bottom:10px}

/* ===== CTA strip ===== */
.cta-strip{
  background:linear-gradient(120deg,var(--navy),var(--navy2));color:#fff;
}
.cta-strip .container{display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap}
.cta-strip h3{font-size:28px;font-weight:800}
.cta-strip p{color:#c3d3e2;margin-top:6px}

/* ===== QA ===== */
.qa-item{background:#fff;border:1px solid #eef1f4;border-radius:12px;margin-bottom:14px;overflow:hidden}
.qa-q{
  width:100%;text-align:left;background:none;border:none;padding:22px 26px;cursor:pointer;
  font-size:17px;font-weight:700;color:var(--navy);display:flex;justify-content:space-between;
  align-items:center;gap:16px;font-family:inherit;
}
.qa-q .plus{width:30px;height:30px;flex:none;border-radius:50%;background:var(--lgray2);
  display:flex;align-items:center;justify-content:center;color:var(--gold);font-size:20px;transition:var(--t)}
.qa-item.open .plus{background:var(--gold);color:#fff;transform:rotate(45deg)}
.qa-a{max-height:0;overflow:hidden;transition:max-height .5s ease}
.qa-a-inner{padding:0 26px 26px;color:var(--gray);font-size:15px}
.qa-a-inner strong{color:var(--ink)}
.qa-item.open .qa-a{max-height:1200px}

/* ===== Contact ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:44px}
.info-card{background:var(--navy);color:#fff;border-radius:16px;padding:40px}
.info-card h3{font-size:26px;margin-bottom:8px}
.info-card .lead{color:#c3d3e2;font-size:15px;margin-bottom:28px}
.info-card .row{display:flex;gap:16px;padding:18px 0;border-top:1px solid rgba(255,255,255,.12)}
.info-card .row .ic{
  width:46px;height:46px;border-radius:12px;background:rgba(255,255,255,.1);flex:none;
  display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--gold-l);
}
.info-card .row b{display:block;font-size:14px;color:#c3d3e2;font-weight:500;margin-bottom:2px}
.info-card .row span,a{font-size:15px;line-height:1.6}
.info-card .social{display:flex;gap:12px;margin-top:26px}
.info-card .social a{width:42px;height:42px;border-radius:50%;background:rgba(255,255,255,.1);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:17px}
.info-card .social a:hover{background:var(--gold);color:#fff}
.form-card{background:#fff;border:1px solid #eef1f4;border-radius:16px;padding:40px;box-shadow:var(--shadow)}
.form-card h3{font-size:24px;color:var(--navy);margin-bottom:6px}
.form-card .lead{color:var(--gray);font-size:14px;margin-bottom:26px}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:7px}
.field label i{color:var(--red);font-style:normal}
.field input,.field select,.field textarea{
  width:100%;padding:13px 15px;border:1.5px solid #e0e6ec;border-radius:10px;font-size:15px;
  font-family:inherit;background:#fbfcfd;transition:all .2s;color:var(--ink);
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--gold);background:#fff;box-shadow:0 0 0 4px rgba(201,162,75,.12);
}
.field textarea{min-height:130px;resize:vertical}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
button[type=submit]{width:100%;justify-content:center;padding:16px}
button[type=submit]:disabled{opacity:.6;cursor:not-allowed}
.form-msg{padding:14px 18px;border-radius:10px;margin-top:18px;font-size:14px;display:none}
.form-msg.ok{display:block;background:#eaf7ee;color:#1e7e45;border:1px solid #bfe6cc}
.form-msg.err{display:block;background:#fdeeee;color:#b02a37;border:1px solid #f5c6cb}

/* ===== Footer ===== */
footer{background:var(--navy);color:#c3d3e2;padding:70px 0 0}
.ft-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:50px}
.ft-grid h4{color:#fff;font-size:16px;margin-bottom:20px;font-weight:700}
.ft-logo{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.ft-logo img{width:44px;height:44px;border-radius:10px}
.ft-logo b{font-size:17px;color:#fff}
.ft-grid p{font-size:14px;line-height:1.8}
.ft-grid ul li{margin-bottom:10px}
.ft-grid ul a{color:#c3d3e2;font-size:14px}
.ft-grid ul a:hover{color:var(--gold-l)}
.ft-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14px;margin-bottom:14px}
.ft-contact li span{flex:none;color:var(--gold)}
.ft-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:24px 0;font-size:13px;color:#9fb0c1;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
}
.ft-bottom a{color:#9fb0c1}
.ft-bottom a:hover{color:var(--gold-l)}

/* ===== Page header ===== */
.page-head{
  background:linear-gradient(120deg,var(--navy),var(--navy2));color:#fff;padding:90px 0 70px;position:relative;overflow:hidden;
}
.page-head::after{
  content:"";position:absolute;right:-120px;top:-120px;width:400px;height:400px;
  border-radius:50%;background:rgba(255,255,255,.05);
}
.page-head h1{font-size:44px;font-weight:800;letter-spacing:-.5px}
.page-head .bread{margin-top:14px;font-size:14px;color:#c3d3e2}
.page-head .bread a{color:#c3d3e2}
.page-head .bread a:hover{color:#fff}
.page-head .bread i{margin:0 10px;color:var(--gold);font-style:normal}

/* ===== Product detail ===== */
.prod-detail{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.gallery .main-img{border-radius:16px;overflow:hidden;border:1px solid #eef1f4;margin-bottom:16px}
.gallery .main-img img{border-radius:16px}
.thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.thumb{
  border:2px solid #eef1f4;border-radius:10px;overflow:hidden;cursor:pointer;opacity:.7;transition:var(--t);
}
.thumb:hover{opacity:1}
.thumb.active{border-color:var(--gold);opacity:1}
.pd h1{font-size:36px;color:var(--navy);font-weight:800;line-height:1.25;margin-bottom:6px}
.pd .model{font-size:14px;color:var(--gold);font-weight:700;letter-spacing:1px;margin-bottom:18px}
.pd .desc{color:var(--gray);font-size:15px;margin-bottom:26px}
.pd .specs{background:var(--lgray2);border-radius:12px;padding:22px;margin-bottom:26px}
.pd .specs li{display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px dashed #dfe5ea;font-size:15px}
.pd .specs li:last-child{border:none}
.pd .specs li b{color:var(--navy)}
.pd .features{margin-bottom:28px}
.pd .features li{display:flex;gap:10px;align-items:flex-start;margin-bottom:10px;font-size:15px;color:var(--gray)}
.pd .features li span{color:var(--gold);flex:none;font-weight:700}
.pd-cta{display:flex;gap:14px;flex-wrap:wrap}

/* ===== Breadcrumb list (detail) ===== */
.crumbs{font-size:14px;color:var(--gray);margin-bottom:26px}
.crumbs a{color:var(--gray)}
.crumbs i{margin:0 8px;color:var(--gold);font-style:normal}

/* ===== 404 ===== */
.nf{text-align:center;padding:120px 0}
.nf h1{font-size:120px;color:var(--gold);font-weight:800}
.nf h2{font-size:32px;color:var(--navy);margin:10px 0 16px}
.nf p{color:var(--gray);margin-bottom:30px}

/* ===== Reveal anim ===== */
.reveal{opacity:0;transform:translateY(28px);transition:all .8s cubic-bezier(.22,.68,.35,1)}
.reveal.in{opacity:1;transform:none}

/* ===== Responsive ===== */
@media(max-width:1080px){
  .scope-grid{grid-template-columns:repeat(3,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:860px){
  section{padding:64px 0}
  .topbar{font-size:12px}
  .topbar .tb-l{gap:14px}
  nav{position:fixed;top:0;right:-100%;width:280px;height:100vh;background:#fff;
    flex-direction:column;padding:90px 24px 40px;transition:right .45s ease;z-index:300;
    box-shadow:-20px 0 50px rgba(0,0,0,.12)}
  nav.open{right:0}
  nav ul{flex-direction:column;width:100%;gap:4px}
  nav a{padding:14px 16px;font-size:16px;border-radius:10px}
  .menu-toggle{display:flex;z-index:310}
  .h-phone{display:none}
  .hero{min-height:520px}
  .hero h1{font-size:36px}
  .hero p{font-size:16px}
  .hero .trust{gap:24px}
  .hero .trust div span{font-size:26px}
  .sec-head h2,.about-txt h2,.page-head h1{font-size:28px}
  .grid-3,.grid-2,.scope-grid,.contact-grid,.prod-detail,.about-grid,.ft-grid{grid-template-columns:1fr}
  .grid-4{grid-template-columns:1fr}
  .scope-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid,.contact-grid,.prod-detail,.ft-grid{gap:34px}
  .form-row{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(3,1fr);gap:10px}
  .stat{padding:14px 8px}
  .stat b{font-size:22px}
  .form-card,.info-card{padding:28px 22px}
  .pd h1{font-size:28px}
  .ft-grid{gap:30px}
  .qa-q{font-size:15px;padding:18px 20px}
  .qa-a-inner{padding:0 20px 20px}
}
@media(max-width:480px){
  .hero h1{font-size:30px}
  .hero .badge{font-size:12px}
  .btn{padding:12px 22px;font-size:14px}
  .scope-grid{grid-template-columns:1fr 1fr}
}
@media print{
  header,footer,.hero,.cta-strip,.topbar,.menu-toggle,.h-cta{display:none!important}
  body{color:#000}
}