:root{
  --navy:#0f2b46;--navy2:#1a3a5c;--blue:#2563eb;--orange:#f97316;--orange2:#ea580c;
  --bg:#f8fafc;--bg2:#f1f5f9;--card:#fff;--text:#1e293b;--muted:#64748b;
  --serif:Georgia,serif;--sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* NAV */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(15,43,70,.97);backdrop-filter:blur(10px)}
.nav-inner{display:flex;justify-content:space-between;align-items:center;height:64px;max-width:1200px;margin:0 auto;padding:0 24px}
.logo{font-size:22px;font-weight:800;letter-spacing:2px;color:#fff;cursor:pointer}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{font-size:13px;color:#cbd5e1;cursor:pointer;transition:color .2s}
.nav-links a:hover{color:#fff}
.btn-quote{background:var(--orange);color:#fff !important;padding:9px 20px;border-radius:6px;font-weight:600}
.btn-quote:hover{background:var(--orange2)}

/* HERO */
.hero{height:88vh;min-height:560px;position:relative;display:flex;align-items:center;margin-top:64px}
.hero-bg{position:absolute;inset:0;background:center/cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(100deg,rgba(15,43,70,.88) 0%,rgba(15,43,70,.6) 50%,rgba(15,43,70,.2) 100%)}
.hero-content{position:relative;z-index:2;color:#fff;max-width:680px}
.hero h1{font-family:var(--serif);font-size:clamp(30px,5vw,52px);line-height:1.15;margin-bottom:20px}
.hero p{font-size:18px;color:#e2e8f0;margin-bottom:32px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn-primary{background:var(--orange);color:#fff;padding:14px 32px;border-radius:8px;font-weight:600;font-size:14px;transition:background .2s}
.btn-primary:hover{background:var(--orange2)}
.btn-outline{border:2px solid #fff;color:#fff;padding:12px 30px;border-radius:8px;font-weight:600;font-size:14px;transition:all .2s}
.btn-outline:hover{background:#fff;color:var(--navy)}

/* STATS */
.stats{background:var(--navy);padding:40px 0}
.stats-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;text-align:center}
.stat-num{font-size:28px;font-weight:800;color:var(--orange)}
.stat-label{font-size:13px;color:#94a3b8;margin-top:2px}

/* SECTIONS */
.section{padding:80px 0}
.section-head{text-align:center;margin-bottom:44px}
.section-label{font-size:12px;letter-spacing:3px;text-transform:uppercase;color:var(--orange);font-weight:600;margin-bottom:8px}
.section-title{font-family:var(--serif);font-size:clamp(26px,4vw,40px);font-weight:400;color:var(--navy)}
.section-sub{color:var(--muted);margin-top:8px}

/* CATEGORIES */
.cat-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cat-card{position:relative;border-radius:12px;overflow:hidden;cursor:pointer;aspect-ratio:4/3;box-shadow:0 2px 12px rgba(0,0,0,.08);background:#fff;transition:transform .3s,box-shadow .3s}
.cat-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(15,43,70,.15)}
.cat-card img{width:100%;height:100%;object-fit:contain;padding:16px}
.cat-card .overlay{position:absolute;bottom:0;left:0;right:0;padding:20px;background:linear-gradient(to top,rgba(15,43,70,.9),transparent)}
.cat-card .overlay h3{color:#fff;font-size:20px;font-family:var(--serif)}
.cat-card .overlay span{color:#94a3b8;font-size:12px}

/* FEATURED */
.featured{background:var(--bg2)}
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feat-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,.06);cursor:pointer;transition:transform .2s}
.feat-card:hover{transform:translateY(-3px)}
.feat-card img{width:100%;aspect-ratio:1;object-fit:contain;padding:16px;background:#fff}
.feat-info{padding:16px}
.feat-info h4{font-size:15px;color:var(--navy);margin-bottom:4px}
.feat-info p{font-size:12px;color:var(--muted);margin-bottom:10px}
.feat-info .inquire{display:inline-block;color:var(--orange);font-size:13px;font-weight:600}

/* OEM */
.oem{background:var(--navy);color:#fff}
.oem .section-title{color:#fff}
.oem .section-sub{color:#94a3b8}
.oem-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:40px}
.oem-card{background:rgba(255,255,255,.06);border-radius:12px;padding:28px 20px;text-align:center}
.oem-icon{font-size:36px;margin-bottom:12px}
.oem-card h3{font-size:16px;margin-bottom:8px;color:#fff}
.oem-card p{font-size:13px;color:#94a3b8}
.flow{display:flex;justify-content:center;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:24px}
.flow-step{background:rgba(255,255,255,.08);padding:16px 20px;border-radius:8px;text-align:center;min-width:140px}
.flow-step strong{display:block;font-size:14px;color:#fff}
.flow-step span{font-size:12px;color:var(--orange)}
.flow-arrow{color:var(--orange);font-size:20px}
.oem-trust{text-align:center;color:#cbd5e1;font-size:14px;padding:16px;background:rgba(249,115,22,.15);border-radius:8px}

/* FACTORY */
.factory-wrap{display:grid;grid-template-columns:1.5fr 1fr;gap:30px;align-items:start}
.factory-left{display:flex;flex-direction:column;gap:16px}
.factory-video{width:100%;border-radius:12px;box-shadow:0 4px 20px rgba(0,0,0,.15)}
.factory-photos{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.factory-photos img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,.08)}
.factory-points{display:flex;flex-direction:column;gap:14px}
.fp-item{background:#fff;padding:18px 20px;border-radius:10px;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.fp-item strong{display:block;color:var(--navy);font-size:16px}
.fp-item span{font-size:13px;color:var(--muted)}

/* CONTACT */
.contact{background:var(--bg2)}
.contact-wrap{max-width:800px;margin:0 auto}
#contact-cards{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.contact-card{background:#fff;border-radius:12px;padding:30px;text-align:center;box-shadow:0 2px 10px rgba(0,0,0,.05)}
.contact-card h3{font-family:var(--serif);font-size:20px;color:var(--navy)}
.contact-card .role{color:var(--orange);font-size:12px;margin:2px 0 14px;font-weight:600}
.contact-card .detail{font-size:13px;color:var(--muted);margin:4px 0}
.wa-btn{display:inline-flex;align-items:center;gap:8px;background:#25d366;color:#fff;padding:12px 28px;border-radius:30px;font-weight:600;font-size:14px;margin-top:14px}
.wa-btn:hover{opacity:.9}
.wa-btn svg{width:18px;height:18px;fill:#fff}
.wa-btn.big{width:100%;justify-content:center;padding:14px;font-size:15px}

/* CATEGORY PAGE */
.cat-header{background:var(--navy);padding:100px 0 30px;margin-bottom:30px}
.cat-header h2{font-family:var(--serif);font-size:28px;color:#fff}
.cat-header p{color:#94a3b8;font-size:14px}
.back-link{color:var(--orange);font-size:13px;cursor:pointer;margin-bottom:12px;display:inline-block}
.back-link:hover{text-decoration:underline}
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:60px}
.prod-card{background:#fff;border-radius:10px;overflow:hidden;cursor:pointer;box-shadow:0 1px 6px rgba(0,0,0,.06);transition:transform .2s,box-shadow .2s}
.prod-card:hover{transform:translateY(-2px);box-shadow:0 4px 14px rgba(0,0,0,.12)}
.prod-card img{width:100%;aspect-ratio:1;object-fit:contain;background:#fff;padding:12px}
.prod-card .p-info{padding:12px}
.prod-card .p-name{font-size:13px;color:var(--text);font-weight:600}
.prod-card .p-price{font-size:12px;color:var(--orange);margin-top:2px}

/* DETAIL */
.detail-header{background:var(--navy);padding:100px 0 30px;margin-bottom:30px}
.detail-header h2{font-family:var(--serif);font-size:22px;color:#fff}
.detail-body{display:flex;flex-direction:column;gap:20px;margin-bottom:60px;align-items:center}
.detail-main{width:100%;max-width:680px}
.img-wrap{position:relative}
.img-wrap img{width:100%;border-radius:12px;box-shadow:0 2px 16px rgba(0,0,0,.1);display:block}
.nav-btn{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.9);border:none;box-shadow:0 2px 8px rgba(0,0,0,.2);cursor:pointer;font-size:24px;color:var(--navy);display:flex;align-items:center;justify-content:center;z-index:5}
.nav-btn:hover{background:var(--orange);color:#fff}
.prev-btn{left:10px}.next-btn{right:10px}
.detail-thumbs{display:flex;gap:8px;margin-top:12px;overflow-x:auto}
.detail-thumbs img{width:70px;height:52px;object-fit:cover;border-radius:4px;cursor:pointer;opacity:.6;flex-shrink:0}
.detail-thumbs img.active{opacity:1;outline:2px solid var(--orange)}
.detail-side{width:100%;max-width:680px;background:#fff;border-radius:12px;padding:24px;box-shadow:0 2px 10px rgba(0,0,0,.05)}
.detail-side h3{font-family:var(--serif);font-size:20px;margin-bottom:10px;color:var(--navy)}
.detail-side p{color:var(--muted);font-size:14px;margin-bottom:20px}

/* FOOTER */
footer{background:var(--navy);color:#94a3b8;padding:40px 0;font-size:13px}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}
.footer-inner a{color:#cbd5e1}
.footer-inner strong{color:#fff}

/* FLOAT */
.wa-float{position:fixed;bottom:20px;right:20px;z-index:999;display:flex;align-items:center;gap:8px;background:#25d366;color:#fff;padding:12px 20px;border-radius:30px;box-shadow:0 4px 14px rgba(37,211,102,.4);font-weight:600;font-size:14px}
.wa-float:hover{transform:scale(1.05)}
.wa-float svg{width:22px;height:22px;fill:#fff}

@media(max-width:768px){
  .container{padding:0 16px}
  .nav-inner{padding:0 16px}
  .nav-links a:not(.btn-quote){display:none}
  .btn-quote{padding:8px 14px;font-size:12px}
  .hero{height:auto;min-height:420px;padding:60px 0;align-items:flex-start}
  .hero h1{font-size:28px}
  .hero p{font-size:15px}
  .hero-btns{flex-direction:column;align-items:stretch}
  .stats{padding:24px 0}
  .stats-grid{grid-template-columns:repeat(3,1fr);gap:12px}
  .stat-num{font-size:18px}
  .stat-label{font-size:11px}
  .section{padding:40px 0}
  .section-head{margin-bottom:24px}
  .cat-cards{grid-template-columns:repeat(2,1fr);gap:10px}
  .feat-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .oem-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .oem-card{padding:18px 12px}
  .factory-wrap{grid-template-columns:1fr;gap:16px}
  .factory-photos{grid-template-columns:repeat(2,1fr);gap:8px}
  .prod-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  #contact-cards{grid-template-columns:1fr;gap:14px}
  .contact-card{padding:20px}
  .footer-inner{grid-template-columns:1fr;gap:16px}
  .flow{flex-direction:column;gap:8px}
  .flow-arrow{transform:rotate(90deg)}
  .wa-float{padding:10px 14px;font-size:12px;bottom:14px;right:14px}
}