:root{
  --red:#9C1C1F;
  --red-light:#B53032;
  --red-dark:#7A1517;
  --gold:#DAA520;
  --ink:#23262B;
  --text:#333333;
  --text-2:#666666;
  --text-3:#999999;
  --line:#EBEBEB;
  --bg:#FFFFFF;
  --bg-soft:#F6F7F9;
  --radius:8px;
  --shadow:0 4px 20px rgba(0,0,0,.06);
  --shadow-hover:0 12px 32px rgba(0,0,0,.12);
  --container:1200px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
section[id],[id='top']{scroll-margin-top:88px;}
@media (max-width:860px){section[id]{scroll-margin-top:80px;}}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Helvetica,Arial,sans-serif;
  color:var(--text);
  background:var(--bg);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 26px;border-radius:6px;
  font-size:15px;font-weight:600;letter-spacing:.3px;
  border:1px solid transparent;cursor:pointer;
  transition:background .2s,color .2s,border-color .2s,box-shadow .2s;
}
.btn-primary{background:var(--red);color:#fff;}
.btn-primary:hover{background:var(--red-light);box-shadow:0 6px 18px rgba(156,28,31,.28);}
.btn-ghost{background:transparent;color:var(--ink);border-color:#D8DBE0;}
.btn-ghost:hover{border-color:var(--red);color:var(--red);}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}

/* ---------- top bar ---------- */
.topbar{background:#23262B;color:#C9CDD4;font-size:13px;}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:38px;}
.topbar-left{display:flex;gap:22px;}
.topbar b{color:#fff;font-weight:600;}
.topbar .hot{color:var(--gold);font-weight:600;letter-spacing:.4px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s;
}
.site-header.scrolled{box-shadow:0 2px 14px rgba(0,0,0,.07);}
.site-header .container{display:flex;align-items:center;height:74px;gap:32px;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand img{height:44px;width:auto;}
.brand .brand-sub{
  font-size:11px;color:var(--text-3);letter-spacing:2px;
  border-left:1px solid var(--line);padding-left:12px;line-height:1.3;
}
.nav{display:flex;gap:6px;margin-left:auto;}
.nav a{
  padding:8px 14px;border-radius:5px;font-size:15px;color:var(--text);font-weight:500;
  transition:color .2s,background .2s;white-space:nowrap;
}
.nav a:hover{color:var(--red);background:#FBF3F3;}
.header-actions{display:flex;align-items:center;gap:12px;}
.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:6px;background:#fff;cursor:pointer;}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);margin:4px auto;}

/* ---------- hero ---------- */
.hero{background:linear-gradient(180deg,#FBF7F7 0%,#FFFFFF 100%);border-bottom:1px solid var(--line);overflow:hidden;}
.hero .container{display:grid;grid-template-columns:1.02fr .98fr;gap:64px;align-items:center;padding-top:72px;padding-bottom:72px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--red);font-weight:600;letter-spacing:1px;
  background:#FBF0F0;border:1px solid #F0D8D8;border-radius:999px;padding:6px 14px;
}
.hero h1{
  font-size:52px;line-height:1.18;letter-spacing:-.5px;margin-top:22px;
  color:var(--ink);font-weight:800;
}
.hero h1 em{font-style:normal;color:var(--red);}
.hero .lead{margin-top:20px;font-size:17px;color:var(--text-2);max-width:520px;}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap;}
.hero-stats{display:flex;gap:40px;margin-top:44px;padding-top:26px;border-top:1px solid var(--line);}
.hero-stats b{display:block;font-size:28px;color:var(--ink);font-weight:800;letter-spacing:-.5px;}
.hero-stats b i{font-style:normal;font-size:15px;color:var(--text-2);font-weight:600;margin-left:2px;}
.hero-stats span{font-size:13px;color:var(--text-3);}
.hero-media{position:relative;}
.hero-media .main-img{
  border-radius:12px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);
  aspect-ratio:1/1;background:#fff;
}
.hero-media .main-img img{width:100%;height:100%;object-fit:cover;}
.hero-media .float-card{
  position:absolute;left:-28px;bottom:36px;background:#fff;border:1px solid var(--line);
  border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.12);padding:16px 20px;display:flex;align-items:center;gap:14px;
}
.hero-media .float-card .dot{width:10px;height:10px;border-radius:50%;background:var(--gold);flex-shrink:0;}
.hero-media .float-card b{display:block;font-size:15px;color:var(--ink);}
.hero-media .float-card span{font-size:12px;color:var(--text-3);}

/* ---------- section base ---------- */
.section{padding:80px 0;}
.section.soft{background:var(--bg-soft);}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-tag{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;
  color:var(--red);margin-bottom:12px;
}
.section-head h2{font-size:34px;line-height:1.3;color:var(--ink);font-weight:800;letter-spacing:-.3px;}
.section-head p{margin-top:14px;color:var(--text-2);font-size:16px;}

/* ---------- tracks ---------- */
.tracks{background:#fff;border-bottom:1px solid var(--line);}
.tracks .container{padding-top:0;padding-bottom:0;}
.track-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-left:1px solid var(--line);}
.track{
  padding:32px 26px;border-right:1px solid var(--line);background:#fff;
  transition:background .25s;position:relative;
}
.track:hover{background:#FCF8F8;}
.track .no{font-size:12px;font-weight:800;color:var(--gold);letter-spacing:2px;}
.track h3{font-size:17px;margin-top:10px;color:var(--ink);font-weight:700;}
.track p{font-size:13.5px;color:var(--text-2);margin-top:8px;line-height:1.65;}
.track::before{
  content:"";position:absolute;left:0;top:0;height:2px;width:0;background:var(--red);
  transition:width .3s;
}
.track:hover::before{width:100%;}

/* ---------- products ---------- */
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:32px;}
.filter{
  height:38px;padding:0 18px;border-radius:999px;border:1px solid #DDE1E6;background:#fff;
  font-size:14px;color:var(--text-2);cursor:pointer;transition:all .2s;font-family:inherit;
}
.filter:hover{border-color:var(--red);color:var(--red);}
.filter.active{background:var(--red);border-color:var(--red);color:#fff;font-weight:600;}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  cursor:pointer;transition:box-shadow .25s,border-color .25s,transform .25s;
  display:flex;flex-direction:column;
}
.card:hover{box-shadow:var(--shadow-hover);border-color:#E0D2D2;transform:translateY(-3px);}
.card-img{position:relative;aspect-ratio:1/1;background:#F3F4F6;overflow:hidden;}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease;}
.card:hover .card-img img{transform:scale(1.04);}
.card-cat{
  position:absolute;left:14px;top:14px;background:rgba(255,255,255,.92);
  color:var(--red);font-size:12px;font-weight:700;padding:5px 10px;border-radius:4px;
  letter-spacing:.5px;backdrop-filter:blur(4px);
}
.card-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1;}
.card-body h3{font-size:17.5px;color:var(--ink);font-weight:700;letter-spacing:-.2px;}
.card-body p{font-size:13.5px;color:var(--text-2);margin-top:8px;line-height:1.65;flex:1;}
.card-more{
  margin-top:16px;font-size:13px;color:var(--red);font-weight:600;
  display:inline-flex;align-items:center;gap:6px;
}
.card-more::after{content:"→";transition:transform .2s;}
.card:hover .card-more::after{transform:translateX(4px);}

/* ---------- why ---------- */
.why .container{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.why-media{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.why-media img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:10px;border:1px solid var(--line);}
.why-media img:first-child{grid-row:span 2;aspect-ratio:auto;height:100%;}
.feature{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--line);}
.feature:last-child{border-bottom:0;}
.feature .num{
  flex-shrink:0;width:40px;height:40px;border-radius:8px;background:#FBF0F0;color:var(--red);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;
}
.feature h3{font-size:16.5px;color:var(--ink);font-weight:700;}
.feature p{font-size:14px;color:var(--text-2);margin-top:6px;}

/* ---------- solutions ---------- */
.solution-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;}
.solution{
  position:relative;border-radius:10px;overflow:hidden;border:1px solid var(--line);
  min-height:260px;display:flex;align-items:flex-end;color:#fff;
}
.solution img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s;}
.solution::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(12,14,17,0) 30%,rgba(12,14,17,.82) 100%);
}
.solution:hover img{transform:scale(1.05);}
.solution .inner{position:relative;z-index:2;padding:28px;}
.solution h3{font-size:20px;font-weight:700;}
.solution p{font-size:14px;color:rgba(255,255,255,.82);margin-top:8px;max-width:420px;}

/* ---------- about ---------- */
.about .container{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:start;}
.about-copy p{color:var(--text-2);font-size:15.5px;line-height:1.9;margin-bottom:16px;}
.about-copy strong{color:var(--ink);}
.stat-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.stat{
  background:#fff;border:1px solid var(--line);border-radius:10px;padding:24px;
}
.stat b{display:block;font-size:30px;font-weight:800;color:var(--red);letter-spacing:-.5px;}
.stat b i{font-style:normal;font-size:15px;margin-left:2px;}
.stat span{font-size:13px;color:var(--text-3);}

/* ---------- contact ---------- */
.contact{background:#1E2126;color:#fff;}
.contact .container{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center;}
.contact h2{font-size:32px;font-weight:800;letter-spacing:-.3px;}
.contact .lead{color:rgba(255,255,255,.72);font-size:15.5px;margin-top:14px;max-width:520px;}
.contact-list{margin-top:36px;display:grid;gap:22px;}
.contact-item{display:flex;gap:16px;align-items:flex-start;}
.contact-item .k{
  flex-shrink:0;width:64px;font-size:13px;color:var(--gold);font-weight:700;letter-spacing:1px;padding-top:3px;
}
.contact-item .v{font-size:16px;color:#fff;line-height:1.6;}
.contact-item .v small{display:block;font-size:13px;color:rgba(255,255,255,.55);margin-top:2px;font-weight:400;}
.contact-card{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  border-radius:12px;padding:28px;display:flex;gap:24px;align-items:center;
}
.contact-card img{width:132px;height:132px;border-radius:8px;background:#fff;padding:6px;object-fit:cover;}
.contact-card h3{font-size:16px;font-weight:700;}
.contact-card p{font-size:13px;color:rgba(255,255,255,.6);margin-top:6px;line-height:1.7;}

/* ---------- footer ---------- */
.site-footer{background:#15171B;color:#8B9099;font-size:13.5px;padding:44px 0 28px;}
.footer-top{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap;padding-bottom:26px;border-bottom:1px solid rgba(255,255,255,.08);}
.footer-brand img{height:40px;width:auto;}
.footer-brand p{margin-top:12px;max-width:420px;line-height:1.8;}
.footer-nav{display:flex;gap:26px;flex-wrap:wrap;align-items:flex-start;}
.footer-nav a:hover{color:#fff;}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:22px;color:#6E7480;}
.footer-bottom a:hover{color:#fff;}

/* ---------- modal ---------- */
.modal{
  position:fixed;inset:0;z-index:200;display:none;align-items:center;justify-content:center;
  padding:24px;background:rgba(12,14,17,.62);backdrop-filter:blur(3px);
}
.modal.open{display:flex;}
.modal-box{
  background:#fff;border-radius:12px;max-width:960px;width:100%;max-height:92vh;overflow:auto;
  display:grid;grid-template-columns:1.05fr .95fr;position:relative;
}
.modal-close{
  position:absolute;right:14px;top:12px;width:36px;height:36px;border-radius:50%;border:0;
  background:rgba(0,0,0,.06);font-size:20px;line-height:1;color:#444;cursor:pointer;z-index:3;
}
.modal-close:hover{background:rgba(0,0,0,.12);}
.modal-img{background:#F3F4F6;aspect-ratio:1/1;}
.modal-img img{width:100%;height:100%;object-fit:cover;}
.modal-body{padding:44px 40px;display:flex;flex-direction:column;}
.modal-body .cat{font-size:12px;color:var(--red);font-weight:700;letter-spacing:1.5px;}
.modal-body h3{font-size:26px;color:var(--ink);font-weight:800;margin-top:10px;letter-spacing:-.3px;line-height:1.3;}
.modal-body .desc{font-size:15px;color:var(--text-2);margin-top:16px;line-height:1.85;}
.modal-body .specs{margin-top:22px;display:grid;gap:10px;}
.modal-body .specs li{
  font-size:14px;color:var(--text);padding-left:18px;position:relative;
}
.modal-body .specs li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--gold);
}
.modal-body .cta{margin-top:auto;padding-top:26px;display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .hero h1{font-size:42px;}
  .hero .container{gap:40px;}
  .product-grid{grid-template-columns:repeat(2,1fr);}
  .track-grid{grid-template-columns:repeat(2,1fr);}
  .track:nth-child(2){border-right:1px solid var(--line);}
}
@media (max-width:860px){
  .nav,.header-actions .btn{display:none;}
  .nav-toggle{display:block;margin-left:auto;}
  .nav.open{
    display:flex;position:absolute;left:0;right:0;top:74px;flex-direction:column;
    background:#fff;border-bottom:1px solid var(--line);padding:12px 24px 18px;gap:2px;
    box-shadow:0 12px 24px rgba(0,0,0,.08);
  }
  .nav.open a{padding:12px 8px;border-bottom:1px solid #F4F4F4;}
  .topbar-left span:nth-child(2){display:none;}
  .hero .container{grid-template-columns:1fr;padding-top:44px;padding-bottom:52px;}
  .hero h1{font-size:34px;}
  .hero-media .float-card{left:12px;bottom:12px;}
  .badge-ep{position:static!important;}
  .why .container,.about .container,.contact .container{grid-template-columns:1fr;gap:36px;}
  .solution-grid{grid-template-columns:1fr;}
  .section{padding:56px 0;}
  .section-head h2{font-size:26px;}
  .modal-box{grid-template-columns:1fr;max-height:88vh;}
  .modal-img{aspect-ratio:4/3;}
  .modal-body{padding:28px 22px 32px;}
  .contact h2{font-size:26px;}
  .footer-top{flex-direction:column;}
}
@media (max-width:560px){
  .product-grid{grid-template-columns:1fr;}
  .track-grid{grid-template-columns:1fr;}
  .track{border-right:0;border-bottom:1px solid var(--line);}
  .hero-stats{display:grid;grid-template-columns:1fr 1fr;gap:20px 16px;}
  .hero-stats b{font-size:24px;}
  .topbar{font-size:12px;}
  .topbar-left{display:none;}
  .topbar .container{justify-content:center;height:34px;}
  .brand-sub{display:none;}
  .stat-cards{grid-template-columns:1fr 1fr;}
  .contact-card{flex-direction:column;text-align:center;}
  .container{padding:0 18px;}
}