/* ============================================================
   TrustLink LED — product & lead-generation site
   Palette: deep navy / electric blue / cyan / warm gold
   ============================================================ */
:root{
  --navy:#0A1B2A; --navy-2:#10283B; --blue:#1E6FD9; --cyan:#35C6E8;
  --gold:#F2B544; --gold-d:#D8992C; --ink:#1B2A35; --muted:#6B7C8A;
  --line:#E2E9F0; --bg:#F7F9FC; --alt:#EEF3F8; --white:#fff;
  --shadow:0 10px 34px rgba(10,27,42,.09);
  --shadow-lg:0 22px 60px rgba(10,27,42,.16);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font-family:inherit;}
.container{max-width:1180px;margin:0 auto;padding:0 24px;}

/* ---------- topbar ---------- */
.topbar{background:var(--navy);color:#BCD2E2;font-size:12.5px;}
.topbar-inner{display:flex;align-items:center;gap:14px;height:38px;}
.topbar-brand{color:#fff;font-weight:800;letter-spacing:.6px;}
.topbar-sep{width:1px;height:14px;background:rgba(255,255,255,.22);}
.topbar-claim{opacity:.82;}
.topbar-tel{margin-left:auto;color:var(--gold);font-weight:700;}
.lang-switch{margin-left:16px;background:transparent;border:1px solid rgba(255,255,255,.35);
  color:#fff;border-radius:4px;padding:3px 11px;font-size:12px;cursor:pointer;transition:.2s;}
.lang-switch:hover{background:rgba(255,255,255,.12);}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.97);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
.nav-inner{display:flex;align-items:center;height:70px;gap:26px;}
.nav-logo img{width:186px;height:auto;}
.nav-links{display:flex;gap:22px;margin-left:auto;align-items:center;}
.nav-links a{font-size:13.5px;font-weight:600;color:#41586B;position:relative;transition:.2s;}
.nav-links a:hover{color:var(--blue);}
.nav-links a::after{content:"";position:absolute;left:0;right:100%;bottom:-6px;height:2px;background:var(--blue);transition:.25s;}
.nav-links a:hover::after{right:0;}
.nav-cta{background:var(--navy);color:#fff;padding:10px 18px;border-radius:5px;font-size:13px;font-weight:700;white-space:nowrap;transition:.2s;}
.nav-cta:hover{background:var(--blue);}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px;margin-left:auto;}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--navy);margin:4px 0;}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:5px;font-size:14px;font-weight:700;
  border:1px solid transparent;cursor:pointer;transition:.2s;white-space:nowrap;}
.btn-gold{background:var(--gold);color:var(--navy);border-color:var(--gold);}
.btn-gold:hover{background:var(--gold-d);border-color:var(--gold-d);transform:translateY(-2px);}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.45);}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff;}
.btn-primary{background:var(--blue);color:#fff;border-color:var(--blue);}
.btn-primary:hover{background:#1559B5;border-color:#1559B5;transform:translateY(-2px);}
.btn-wide{width:100%;}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--navy);color:#fff;overflow:hidden;}
.hero-bg{position:absolute;inset:0;}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center;opacity:.55;}
.hero-overlay{position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(8,22,35,.96) 0%,rgba(8,22,35,.86) 42%,rgba(8,22,35,.30) 76%,rgba(8,22,35,.55) 100%);}
.hero-inner{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:50px;
  align-items:center;padding-top:88px;padding-bottom:92px;}
.hero-eyebrow{display:flex;align-items:center;gap:12px;color:var(--cyan);
  font-size:11.5px;font-weight:800;letter-spacing:2.2px;margin-bottom:22px;}
.eb-line{width:34px;height:2px;background:var(--gold);}
.hero-title{font-size:47px;line-height:1.18;margin:0 0 20px;font-weight:800;letter-spacing:-.6px;}
.hero-title .hl{color:var(--gold);}
.hero-sub{max-width:610px;color:#C6D7E4;font-size:15.5px;line-height:1.85;margin:0 0 30px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:28px;}
.hero-tags{display:flex;gap:9px;flex-wrap:wrap;}
.hero-tags span{font-size:11.5px;color:#D3E2EE;border:1px solid rgba(255,255,255,.24);
  border-radius:3px;padding:5px 11px;background:rgba(255,255,255,.05);}
.hero-visual{position:relative;}
.hero-thumb{width:100%;border-radius:12px;box-shadow:var(--shadow-lg);
  border:1px solid rgba(255,255,255,.14);aspect-ratio:4/3;object-fit:cover;}
.hero-badge{position:absolute;right:-14px;bottom:-22px;background:var(--gold);color:var(--navy);
  border-radius:10px;padding:14px 18px;display:flex;align-items:center;gap:12px;box-shadow:var(--shadow-lg);}
.hero-badge strong{font-size:30px;line-height:1;font-weight:800;}
.hero-badge strong span{font-size:17px;}
.hero-badge span{font-size:11.5px;font-weight:700;line-height:1.4;}
.hero-stats{border-top:1px solid rgba(255,255,255,.13);background:rgba(6,18,29,.72);position:relative;}
.stats-inner{display:grid;grid-template-columns:repeat(4,1fr);}
.stat{padding:24px 10px;text-align:center;border-right:1px solid rgba(255,255,255,.1);}
.stat:last-child{border-right:0;}
.stat strong{display:block;font-size:25px;font-weight:800;color:#fff;letter-spacing:-.5px;}
.stat strong span{font-size:14px;color:var(--cyan);font-weight:700;margin-left:2px;}
.stat>span{font-size:12px;color:#A8C0D2;}

/* ---------- section common ---------- */
.section{padding:88px 0;}
.section-alt{background:var(--alt);}
.section-dark{background:var(--navy);color:#fff;}
.section-head{text-align:center;max-width:720px;margin:0 auto 48px;}
.eyebrow{color:var(--blue);font-size:11.5px;font-weight:800;letter-spacing:2.4px;margin-bottom:12px;}
.eyebrow.light{color:var(--cyan);}
.section-title{font-size:33px;line-height:1.3;font-weight:800;margin:0 0 14px;letter-spacing:-.5px;}
.section-title.light{color:#fff;}
.section-title.left{text-align:left;}
.section-sub{color:var(--muted);font-size:15px;margin:0;line-height:1.85;}

/* ---------- product overview ---------- */
.prod-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;}
.prod-card{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;
  box-shadow:var(--shadow);transition:.25s;display:block;}
.prod-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:#C9DCEF;}
.prod-card-img{height:230px;background:#EDF2F6;overflow:hidden;}
.prod-card-img img{width:100%;height:100%;object-fit:cover;transition:.4s;}
.prod-card:hover .prod-card-img img{transform:scale(1.05);}
.prod-card-body{padding:26px 28px 28px;position:relative;}
.prod-no{position:absolute;top:22px;right:26px;font-size:30px;font-weight:800;color:#E4EDF5;}
.prod-card h3{font-size:21px;margin:0 0 10px;font-weight:800;}
.prod-card p{color:var(--muted);font-size:14px;margin:0 0 18px;max-width:460px;}
.prod-link{color:var(--blue);font-size:13.5px;font-weight:800;}

/* ---------- chips ---------- */
.chip-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:44px;}
.chip-card{background:#fff;border:1px solid var(--line);border-radius:9px;overflow:hidden;box-shadow:var(--shadow);}
.chip-img{height:168px;background:#F2F6F9;display:flex;align-items:center;justify-content:center;overflow:hidden;}
.chip-img img{width:100%;height:100%;object-fit:contain;padding:14px;mix-blend-mode:multiply;}
.chip-body{padding:16px 18px 18px;border-top:1px solid var(--line);}
.chip-code{font-size:11px;font-weight:800;color:var(--blue);letter-spacing:.8px;}
.chip-card h4{font-size:16px;margin:5px 0 7px;font-weight:800;}
.chip-card p{margin:0;font-size:12.5px;color:var(--muted);line-height:1.6;}
.table-wrap{background:#fff;border:1px solid var(--line);border-radius:9px;box-shadow:var(--shadow);overflow:hidden;}
.table-head{display:flex;justify-content:space-between;align-items:baseline;gap:16px;
  padding:20px 24px;border-bottom:1px solid var(--line);flex-wrap:wrap;}
.table-head h3{margin:0;font-size:16px;font-weight:800;}
.table-head span{font-size:12px;color:var(--muted);}
.table-scroll{overflow-x:auto;}
.spec-table{width:100%;border-collapse:collapse;font-size:13px;min-width:680px;}
.spec-table th{background:var(--navy);color:#fff;text-align:left;padding:12px 16px;font-size:11.5px;
  letter-spacing:.7px;font-weight:700;white-space:nowrap;}
.spec-table td{padding:11px 16px;border-bottom:1px solid #EDF1F5;white-space:nowrap;}
.spec-table tr:last-child td{border-bottom:0;}
.spec-table tbody tr:nth-child(even){background:#FAFCFE;}
.spec-table td:first-child{font-weight:700;color:var(--blue);}

/* ---------- strips ---------- */
.tabs{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:30px;}
.tab-btn{background:#fff;border:1px solid var(--line);border-radius:6px;padding:10px 18px;
  font-size:13px;font-weight:700;color:#4B6072;cursor:pointer;transition:.2s;}
.tab-btn:hover{border-color:var(--blue);color:var(--blue);}
.tab-btn.active{background:var(--navy);color:#fff;border-color:var(--navy);}
.strip-panel{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:10px;padding:30px;box-shadow:var(--shadow);min-height:330px;}
.strip-media{border-radius:8px;overflow:hidden;background:#0A1B2A;}
.strip-media img{width:100%;height:275px;object-fit:cover;}
.strip-body h3{font-size:23px;margin:0 0 10px;font-weight:800;}
.strip-body>p{color:var(--muted);font-size:14px;margin:0 0 18px;line-height:1.8;}
.strip-specs{display:grid;grid-template-columns:repeat(2,1fr);gap:10px 18px;margin-bottom:18px;}
.strip-specs div{font-size:12.5px;border-left:2px solid var(--cyan);padding-left:10px;}
.strip-specs b{display:block;font-size:10.5px;letter-spacing:.7px;color:var(--muted);text-transform:uppercase;font-weight:700;}
.strip-tags{display:flex;gap:7px;flex-wrap:wrap;}
.strip-tags span{font-size:11.5px;background:var(--alt);border:1px solid var(--line);
  border-radius:3px;padding:4px 9px;color:#48606F;font-weight:600;}
.code-box{margin-top:28px;background:var(--navy);color:#fff;border-radius:10px;padding:26px 28px;}
.code-box-head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;margin-bottom:20px;}
.code-box-head span{font-size:13px;font-weight:800;letter-spacing:1px;color:var(--cyan);}
.code-box-head code{font-size:16px;color:var(--gold);background:rgba(255,255,255,.08);
  padding:5px 12px;border-radius:4px;}
.code-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
.code-item{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:6px;padding:12px 14px;}
.code-item b{display:block;color:var(--gold);font-size:12px;margin-bottom:4px;}
.code-item span{font-size:12px;color:#C9DCEA;line-height:1.6;}

/* ---------- factory ---------- */
.factory-wrap{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.factory-main{width:100%;height:290px;object-fit:cover;border-radius:9px;}
.factory-subs{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px;}
.factory-subs img{width:100%;height:140px;object-fit:cover;border-radius:7px;}
.factory-text{color:#BDD0DF;font-size:14.5px;line-height:1.85;margin:0 0 16px;}
.factory-points{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:22px 0;}
.fp{display:flex;gap:10px;align-items:flex-start;background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);border-radius:6px;padding:12px 14px;}
.fp i{width:8px;height:8px;border-radius:50%;background:var(--gold);flex:none;margin-top:7px;}
.fp span{font-size:12.5px;color:#DCE9F2;line-height:1.5;}
.factory-addr{display:flex;gap:10px;align-items:flex-start;font-size:12.5px;color:#9FBACB;
  border-top:1px solid rgba(255,255,255,.14);padding-top:16px;}
.fa-dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);flex:none;margin-top:7px;}

/* ---------- applications ---------- */
.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.app-card{background:#fff;border:1px solid var(--line);border-radius:9px;padding:26px 24px;
  box-shadow:var(--shadow);transition:.2s;}
.app-card:hover{border-color:var(--cyan);transform:translateY(-3px);}
.app-ico{width:42px;height:42px;border-radius:8px;background:#E9F5FB;color:var(--blue);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;}
.app-ico svg{width:23px;height:23px;}
.app-card h4{margin:0 0 7px;font-size:16px;font-weight:800;}
.app-card p{margin:0;font-size:13px;color:var(--muted);line-height:1.7;}

/* ---------- quality ---------- */
.quality-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.quality-copy p{color:var(--muted);font-size:14.5px;line-height:1.85;}
.quality-list{display:grid;gap:12px;}
.ql{display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:8px;
  padding:16px 18px;box-shadow:var(--shadow);}
.ql-n{font-size:19px;font-weight:800;color:var(--cyan);flex:none;width:34px;}
.ql b{display:block;font-size:14px;margin-bottom:3px;}
.ql span{font-size:12.5px;color:var(--muted);line-height:1.6;}

/* ---------- download ---------- */
.download-wrap{display:flex;align-items:center;gap:26px;background:var(--navy);color:#fff;
  border-radius:12px;padding:34px 38px;box-shadow:var(--shadow-lg);}
.download-icon{width:64px;height:64px;flex:none;border-radius:12px;background:rgba(53,198,232,.14);
  display:flex;align-items:center;justify-content:center;color:var(--cyan);}
.download-icon svg{width:32px;height:32px;}
.download-copy{flex:1;}
.download-copy h2{margin:0 0 6px;font-size:22px;font-weight:800;}
.download-copy p{margin:0;color:#AFC7D8;font-size:13.5px;}

/* ---------- contact ---------- */
.section-contact{background:var(--alt);}
.contact-wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:34px;align-items:start;}
.contact-info{background:var(--navy);color:#fff;border-radius:10px;padding:32px 30px;}
.contact-info h3{font-size:18px;margin:0 0 22px;font-weight:800;}
.company-block{border-bottom:1px solid rgba(255,255,255,.15);padding-bottom:20px;margin-bottom:20px;}
.company-logo{width:170px;background:#fff;border-radius:5px;padding:8px 10px;margin-bottom:14px;}
.company-name{font-size:14.5px;font-weight:800;}
.company-cn{font-size:13px;color:var(--cyan);margin-top:3px;}
.info-item{margin-bottom:16px;}
.info-label{font-size:10.5px;letter-spacing:1.2px;text-transform:uppercase;color:#8FAABE;font-weight:700;margin-bottom:3px;}
.info-val{font-size:13.5px;word-break:break-word;}
.info-val a:hover{color:var(--gold);}
.addr-val{color:#C3D6E4;font-size:12.5px;line-height:1.65;}
.inquiry{background:#fff;border:1px solid var(--line);border-radius:10px;padding:30px;box-shadow:var(--shadow);}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.form-group{margin-bottom:16px;}
.form-group label{display:block;font-size:12.5px;font-weight:700;margin-bottom:6px;color:#3B5265;}
.form-group input,.form-group select,.form-group textarea{width:100%;border:1px solid #D8E2EA;
  border-radius:5px;padding:11px 13px;font-size:13.5px;color:var(--ink);background:#fff;outline:none;transition:.2s;}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(30,111,217,.1);}
.form-group textarea{resize:vertical;}
.form-note{font-size:11.5px;color:var(--muted);margin:14px 0 0;line-height:1.6;}

/* ---------- footer ---------- */
.footer{background:#071622;color:#A9C0D0;padding-top:58px;}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px;padding-bottom:44px;}
.footer-brand img{width:180px;background:#fff;border-radius:5px;padding:8px 10px;margin-bottom:16px;}
.footer-brand p{font-size:13px;line-height:1.8;max-width:300px;margin:0;}
.footer-col h4{color:#fff;font-size:13px;margin:0 0 14px;font-weight:800;}
.footer-col a{display:block;font-size:12.5px;margin-bottom:9px;transition:.2s;}
.footer-col a:hover{color:var(--gold);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;padding-bottom:24px;
  display:flex;justify-content:space-between;gap:20px;font-size:11.5px;flex-wrap:wrap;}
.footer-note{max-width:560px;text-align:right;color:#7F9BAC;}

/* ---------- modal ---------- */
.modal{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:20px;}
.modal.open{display:flex;}
.modal-backdrop{position:absolute;inset:0;background:rgba(5,16,26,.72);}
.modal-panel{position:relative;background:#fff;border-radius:10px;padding:28px;width:min(620px,100%);box-shadow:var(--shadow-lg);}
.modal-panel h3{margin:0 0 16px;font-size:19px;}
.modal-panel textarea{width:100%;border:1px solid var(--line);border-radius:6px;padding:12px;
  font-size:12.5px;line-height:1.7;resize:vertical;font-family:monospace;}
.modal-close{position:absolute;right:14px;top:10px;background:none;border:0;font-size:26px;cursor:pointer;color:var(--muted);}
.modal-actions{display:flex;gap:12px;margin-top:16px;}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .nav-links{display:none;position:absolute;top:70px;left:0;right:0;background:#fff;
    flex-direction:column;align-items:flex-start;padding:16px 24px;gap:12px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);}
  .nav-links.open{display:flex;}
  .nav-toggle{display:block;}
  .nav-cta{display:none;}
  .hero-inner{grid-template-columns:1fr;padding-top:60px;padding-bottom:64px;}
  .hero-visual{display:none;}
  .hero-title{font-size:38px;}
  .factory-wrap,.quality-wrap{grid-template-columns:1fr;gap:32px;}
  .strip-panel{grid-template-columns:1fr;}
  .chip-grid{grid-template-columns:repeat(2,1fr);}
  .app-grid{grid-template-columns:repeat(2,1fr);}
  .footer-top{grid-template-columns:repeat(2,1fr);}
  .contact-wrap{grid-template-columns:1fr;}
}
@media (max-width:640px){
  .section{padding:60px 0;}
  .section-title{font-size:26px;}
  .topbar-claim,.topbar-sep{display:none;}
  .hero-title{font-size:31px;}
  .hero-actions .btn{width:100%;}
  .hero-badge{right:0;}
  .stats-inner{grid-template-columns:repeat(2,1fr);}
  .stat:nth-child(2){border-right:0;}
  .stat{border-bottom:1px solid rgba(255,255,255,.1);}
  .prod-grid,.chip-grid,.app-grid,.code-grid{grid-template-columns:1fr;}
  .factory-points,.strip-specs,.form-row{grid-template-columns:1fr;}
  .download-wrap{flex-direction:column;align-items:flex-start;padding:26px;}
  .footer-top{grid-template-columns:1fr;}
  .footer-note{text-align:left;}
  .code-item{padding:10px 12px;}
  .section-head{margin-bottom:34px;}
}