:root{
  --navy:#0d2b45;
  --blue:#1b5e8a;
  --orange:#e8712f;
  --bg:#f7f9fb;
  --card:#ffffff;
  --text:#26313c;
  --muted:#5c6b7a;
  --line:#e2e8ee;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.65;}
a{text-decoration:none;color:inherit;}
img{max-width:100%;display:block;}
.container{max-width:1120px;margin:0 auto;padding:0 24px;}

/* Header */
header{position:sticky;top:0;background:#ffffffee;backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:50;}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;}
.brand{display:flex;align-items:baseline;gap:10px;}
.brand .logo{font-size:21px;font-weight:800;color:var(--navy);letter-spacing:.5px;}
.brand .logo span{color:var(--orange);}
.brand .sub{font-size:12px;color:var(--muted);letter-spacing:1.5px;text-transform:uppercase;}
nav ul{display:flex;gap:24px;list-style:none;font-size:14.5px;font-weight:600;flex-wrap:wrap;}
nav a{color:var(--muted);transition:color .2s;}
nav a:hover,nav a.active{color:var(--orange);}

/* Hero */
.hero{background:linear-gradient(135deg,var(--navy) 0%,var(--blue) 100%);color:#fff;padding:88px 0 80px;}
.hero .tag{display:inline-block;background:#ffffff22;border:1px solid #ffffff44;border-radius:20px;padding:4px 16px;font-size:13px;letter-spacing:1.5px;margin-bottom:22px;}
.hero h1{font-size:42px;line-height:1.22;font-weight:800;max-width:780px;}
.hero h1 em{font-style:normal;color:#ffb37e;}
.hero p{margin-top:18px;font-size:17.5px;max-width:700px;color:#d9e4ee;}
.hero .cta{margin-top:32px;display:flex;gap:16px;flex-wrap:wrap;}
.btn{display:inline-block;padding:13px 30px;border-radius:6px;font-weight:700;font-size:15px;transition:transform .15s, box-shadow .15s;}
.btn:hover{transform:translateY(-2px);}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 6px 18px #e8712f55;}
.btn-ghost{border:1.5px solid #ffffff88;color:#fff;}

/* Stats */
.stats{background:#fff;border-bottom:1px solid var(--line);}
.stats .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding:28px 0;}
.stat{text-align:center;padding:8px;}
.stat .num{font-size:29px;font-weight:800;color:var(--navy);}
.stat .lbl{font-size:12.5px;color:var(--muted);letter-spacing:1px;text-transform:uppercase;}

/* Sections */
section{padding:68px 0;}
.sec-head{max-width:720px;margin-bottom:40px;}
.sec-head .kicker{color:var(--orange);font-weight:800;font-size:13px;letter-spacing:2.5px;text-transform:uppercase;}
.sec-head h1,.sec-head h2{font-size:31px;color:var(--navy);margin-top:8px;line-height:1.3;}
.sec-head p{color:var(--muted);margin-top:12px;}

/* About / split layout */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;}
.split img{border-radius:12px;box-shadow:0 10px 30px #0d2b4518;}
.about-grid h3{color:var(--navy);font-size:19px;margin:20px 0 8px;}
.about-grid p{color:var(--muted);}
.feature-list{list-style:none;display:grid;gap:14px;}
.feature-list li{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--orange);border-radius:8px;padding:16px 18px;}
.feature-list b{color:var(--navy);display:block;margin-bottom:3px;}
.feature-list span{font-size:14px;color:var(--muted);}

/* Product cards */
.prod-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:box-shadow .2s, transform .2s;display:flex;flex-direction:column;}
.card:hover{box-shadow:0 12px 28px #0d2b4514;transform:translateY(-3px);}
.card img{height:230px;object-fit:cover;width:100%;}
.card .body{padding:24px;flex:1;display:flex;flex-direction:column;}
.card .code{font-size:12.5px;font-weight:800;color:var(--orange);letter-spacing:1.5px;}
.card h3{color:var(--navy);font-size:19px;margin:8px 0 10px;}
.card p{font-size:14.5px;color:var(--muted);flex:1;}
.card .meta{margin-top:12px;font-size:13px;color:var(--blue);font-weight:600;}
.card .more{margin-top:14px;font-weight:700;color:var(--orange);font-size:14px;}

/* Applications */
.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.app{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:20px 22px;}
.app b{color:var(--navy);}
.app span{display:block;font-size:13.5px;color:var(--muted);margin-top:4px;}

/* Tables */
.table-wrap{overflow-x:auto;background:var(--card);border:1px solid var(--line);border-radius:12px;box-shadow:0 4px 14px #0d2b4508;}
table{width:100%;border-collapse:collapse;font-size:14px;min-width:640px;}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line);}
thead th{background:var(--navy);color:#fff;font-weight:700;font-size:13px;letter-spacing:.4px;white-space:nowrap;}
tbody tr:nth-child(even){background:#f4f7fa;}
tbody tr:last-child td{border-bottom:none;}
td b{color:var(--navy);}
.tnote{font-size:12.5px;color:var(--muted);margin-top:10px;}

/* Product page hero strip */
.page-hero{background:linear-gradient(135deg,var(--navy) 0%,var(--blue) 100%);color:#fff;padding:56px 0;}
.page-hero h1{font-size:32px;}
.page-hero p{color:#d9e4ee;margin-top:10px;max-width:760px;}
.page-hero .crumb{font-size:13px;color:#9fb7cb;margin-bottom:14px;}
.page-hero .crumb a{color:#cfdde9;}

/* Product detail layout */
.pd-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:start;}
.pd-grid img.main{border-radius:12px;box-shadow:0 10px 30px #0d2b4518;width:100%;}
.pd-grid h2{color:var(--navy);font-size:22px;margin:22px 0 10px;}
.pd-grid p{color:var(--muted);}
.badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.badge{background:#fff;border:1px solid var(--line);border-radius:8px;padding:10px 16px;font-size:13px;color:var(--navy);font-weight:700;}
.badge small{display:block;color:var(--muted);font-weight:400;}
h3.block{color:var(--navy);font-size:21px;margin:48px 0 6px;}
ul.check{list-style:none;display:grid;gap:9px;margin-top:14px;}
ul.check li{padding-left:26px;position:relative;color:var(--muted);font-size:15px;}
ul.check li:before{content:"✔";position:absolute;left:0;color:var(--orange);font-weight:700;}

/* Contact */
#contact{background:var(--navy);color:#fff;}
#contact .sec-head h2{color:#fff;}
#contact .sec-head p{color:#b9c8d6;}
.contact-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:start;}
.contact-item{margin-bottom:20px;}
.contact-item .lbl{font-size:12px;letter-spacing:2px;text-transform:uppercase;color:#8fa6ba;margin-bottom:4px;}
.contact-item .val{font-size:16.5px;font-weight:600;}
.contact-item .val a{color:#fff;}
.contact-item .val a:hover{color:#ffb37e;}
.qr-card{background:#fff;border-radius:12px;padding:20px;text-align:center;color:var(--text);}
.qr-card img{width:210px;margin:0 auto;border-radius:8px;}
.qr-card b{display:block;margin-top:10px;color:var(--navy);}
.qr-card span{font-size:13.5px;color:var(--muted);}
.note{background:#ffffff14;border:1px dashed #ffffff44;border-radius:8px;padding:18px 20px;font-size:14px;color:#d9e4ee;margin-top:8px;}

footer{background:#081e31;color:#7f94a7;font-size:13.5px;padding:24px 0;}
footer .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;}
footer a{color:#a9bccd;}
footer a:hover{color:#fff;}

@media (max-width:880px){
  .hero h1{font-size:30px;}
  .page-hero h1{font-size:26px;}
  .stats .grid{grid-template-columns:repeat(2,1fr);}
  .prod-grid,.app-grid{grid-template-columns:1fr;}
  .split,.pd-grid,.contact-grid{grid-template-columns:1fr;}
  nav ul{display:none;}
}