*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;color:#2c3e50;background:#f7f9fa;line-height:1.7}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
.zt-wrap{max-width:1200px;margin:0 auto;padding:0 20px}
.zt-topbar{background:#144852;color:#cfe3e6;font-size:13px;padding:7px 0}
.zt-topbar .zt-wrap{display:flex;justify-content:space-between;flex-wrap:wrap}
.zt-header{background:#fff;position:sticky;top:0;z-index:99;box-shadow:0 2px 12px rgba(0,0,0,.06)}
.zt-nav{display:flex;align-items:center;justify-content:space-between;height:78px}
.zt-logo{display:flex;align-items:center;gap:10px}
.zt-logo img{height:52px;width:auto}
.zt-menu{display:flex;gap:6px;align-items:center}
.zt-menu a{padding:10px 18px;font-size:15px;color:#2c3e50;font-weight:500;position:relative;border-radius:4px}
.zt-menu a:hover,.zt-menu a.zt-on{color:#1a5f6e;background:#eef5f6}
.zt-menu a.zt-on::after{content:"";position:absolute;left:18px;right:18px;bottom:2px;height:2px;background:#c9a961}
.zt-burger{display:none;cursor:pointer;background:none;border:none;width:30px;height:22px;position:relative}
.zt-burger span{position:absolute;left:0;width:100%;height:3px;background:#1a5f6e;border-radius:2px}
.zt-burger span:nth-child(1){top:0}
.zt-burger span:nth-child(2){top:9px}
.zt-burger span:nth-child(3){top:18px}
.zt-hero{position:relative;height:520px;overflow:hidden;color:#fff;display:flex;align-items:center}
.zt-hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.zt-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(15,60,68,.88) 0%,rgba(15,60,68,.55) 55%,rgba(15,60,68,.25) 100%)}
.zt-hero-in{position:relative;z-index:2}
.zt-hero h1{font-size:42px;line-height:1.3;margin-bottom:18px;font-weight:700}
.zt-hero p{font-size:18px;max-width:600px;margin-bottom:28px;color:#e6f0f1}
.zt-btn{display:inline-block;padding:13px 34px;background:#c9a961;color:#fff;border-radius:3px;font-size:15px;letter-spacing:1px;transition:.3s}
.zt-btn:hover{background:#b08d4e}
.zt-btn-ghost{background:transparent;border:1px solid #c9a961;margin-left:12px}
.zt-sec{padding:70px 0}
.zt-sec-t{text-align:center;margin-bottom:46px}
.zt-sec-t small{color:#c9a961;letter-spacing:4px;font-size:13px}
.zt-sec-t h2{font-size:30px;color:#1a5f6e;margin-top:8px;font-weight:700}
.zt-sec-t p{color:#7a8a8d;margin-top:10px;font-size:14px}
.zt-svc{background:#fff}
.zt-svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.zt-svc-card{background:#fff;border:1px solid #e6edee;border-radius:6px;overflow:hidden;transition:.3s}
.zt-svc-card:hover{transform:translateY(-6px);box-shadow:0 12px 28px rgba(26,95,110,.12)}
.zt-svc-card img{height:200px;width:100%;object-fit:cover}
.zt-svc-body{padding:22px}
.zt-svc-body h3{font-size:18px;color:#1a5f6e;margin-bottom:10px}
.zt-svc-body p{font-size:14px;color:#6b7a7d}
.zt-svc-body a{color:#c9a961;font-size:13px;margin-top:12px;display:inline-block}
.zt-flow{background:#eef5f6}
.zt-flow-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;text-align:center}
.zt-flow-step{background:#fff;padding:26px 10px;border-radius:6px;position:relative}
.zt-flow-num{width:42px;height:42px;line-height:42px;border-radius:50%;background:#1a5f6e;color:#fff;margin:0 auto 12px;font-weight:700}
.zt-flow-step h4{font-size:15px;color:#1a5f6e;margin-bottom:6px}
.zt-flow-step p{font-size:12px;color:#7a8a8d}
.zt-about{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.zt-about img{border-radius:6px;height:380px;width:100%;object-fit:cover}
.zt-about h2{color:#1a5f6e;font-size:28px;margin-bottom:18px}
.zt-about p{color:#5a6a6d;margin-bottom:14px;font-size:15px}
.zt-about ul{margin-top:14px}
.zt-about li{padding:6px 0;color:#3a4a4d;font-size:14px}
.zt-about li b{color:#c9a961;margin-right:8px}
.zt-case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.zt-case{position:relative;border-radius:6px;overflow:hidden;height:240px}
.zt-case img{width:100%;height:100%;object-fit:cover;transition:.5s}
.zt-case:hover img{transform:scale(1.08)}
.zt-case-t{position:absolute;left:0;right:0;bottom:0;background:linear-gradient(transparent,rgba(15,60,68,.92));color:#fff;padding:30px 18px 16px}
.zt-case-t h4{font-size:16px}
.zt-case-t span{font-size:12px;color:#c9a961}
.zt-adv{background:#1a5f6e;color:#fff}
.zt-adv .zt-sec-t h2{color:#fff}
.zt-adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.zt-adv-card{background:rgba(255,255,255,.08);padding:30px 22px;border-radius:6px;border-left:3px solid #c9a961}
.zt-adv-card h4{font-size:18px;margin-bottom:10px;color:#fff}
.zt-adv-card p{font-size:13px;color:#cfe3e6}
.zt-news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.zt-news-card{background:#fff;border-radius:6px;overflow:hidden;border:1px solid #e6edee}
.zt-news-card img{height:180px;width:100%;object-fit:cover}
.zt-news-body{padding:18px}
.zt-news-body .zt-date{color:#c9a961;font-size:12px}
.zt-news-body h3{font-size:16px;margin:8px 0;color:#2c3e50;line-height:1.5}
.zt-news-card:hover h3{color:#1a5f6e}
.zt-cta{background:linear-gradient(120deg,#144852,#1a5f6e);color:#fff;text-align:center;padding:60px 20px}
.zt-cta h2{font-size:28px;margin-bottom:12px}
.zt-cta p{color:#cfe3e6;margin-bottom:24px}
.zt-footer{background:#123d45;color:#9db8bc;padding:50px 0 20px;font-size:13px}
.zt-foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:30px;margin-bottom:30px}
.zt-foot-grid h4{color:#fff;font-size:15px;margin-bottom:16px}
.zt-foot-grid p{margin-bottom:8px;line-height:1.8}
.zt-foot-grid a{color:#9db8bc;display:block;padding:3px 0}
.zt-foot-grid a:hover{color:#c9a961}
.zt-copy{border-top:1px solid #1f4f58;padding-top:18px;text-align:center;font-size:12px;color:#6d8a8e}
.zt-sub{background:#1a5f6e;color:#fff;padding:50px 0;text-align:center}
.zt-sub h1{font-size:32px}
.zt-sub p{color:#cfe3e6;margin-top:8px}
.zt-bread{background:#fff;padding:14px 0;font-size:13px;color:#7a8a8d;border-bottom:1px solid #e6edee}
.zt-bread a{color:#1a5f6e}
.zt-article{background:#fff;padding:40px;border-radius:6px;margin:30px 0}
.zt-article h1{font-size:26px;color:#1a5f6e;line-height:1.4;margin-bottom:12px}
.zt-article .zt-meta{color:#9db8bc;font-size:13px;border-bottom:1px solid #e6edee;padding-bottom:16px;margin-bottom:22px}
.zt-article img{border-radius:6px;margin:18px 0}
.zt-article p{margin-bottom:16px;color:#3a4a4d;font-size:15px}
.zt-article h3{color:#1a5f6e;margin:22px 0 12px;font-size:18px}
.zt-pag{text-align:center;margin:30px 0}
.zt-pag a{display:inline-block;padding:8px 14px;border:1px solid #d6e0e1;margin:0 3px;color:#1a5f6e;border-radius:3px}
.zt-pag a.zt-on{background:#1a5f6e;color:#fff}
.zt-prod-detail{display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:start}
.zt-prod-detail img{border-radius:6px;height:340px;width:100%;object-fit:cover}
.zt-spec{background:#f0f6f7;padding:20px;border-radius:6px;margin-top:20px}
.zt-spec h4{color:#1a5f6e;margin-bottom:10px}
.zt-spec li{padding:5px 0;font-size:14px;color:#3a4a4d}
.zt-404{text-align:center;padding:100px 20px}
.zt-404 h1{font-size:100px;color:#1a5f6e;line-height:1}
.zt-404 p{margin:20px 0 30px;color:#7a8a8d;font-size:16px}
@media(max-width:900px){
  .zt-menu{display:none;position:absolute;top:78px;left:0;right:0;background:#fff;flex-direction:column;padding:14px 0;box-shadow:0 8px 16px rgba(0,0,0,.08)}
  .zt-menu.zt-open{display:flex}
  .zt-menu a{padding:12px 24px}
  .zt-burger{display:block}
  .zt-hero{height:420px}
  .zt-hero h1{font-size:28px}
  .zt-svc-grid,.zt-news-grid,.zt-case-grid{grid-template-columns:1fr 1fr}
  .zt-flow-grid{grid-template-columns:repeat(3,1fr)}
  .zt-adv-grid{grid-template-columns:1fr 1fr}
  .zt-about,.zt-prod-detail{grid-template-columns:1fr}
  .zt-foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
  .zt-svc-grid,.zt-news-grid,.zt-case-grid,.zt-flow-grid,.zt-adv-grid,.zt-foot-grid{grid-template-columns:1fr}
  .zt-hero{height:380px}
  .zt-hero h1{font-size:24px}
  .zt-article{padding:22px}
}