:root{
  --nav:#060b14;--blue:#0059b2;--blue2:#00a0e9;--deep:#031a3a;--text:#101828;--muted:#667085;
  --line:rgba(255,255,255,.18);--lightline:#d9e4f2;--bg:#f4f7fb;--card:#fff;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;color:var(--text);background:var(--bg);-webkit-text-size-adjust:100%}
a{text-decoration:none;color:inherit}
.header{height:74px;background:rgba(3,8,18,.96);position:sticky;top:0;z-index:100;border-bottom:1px solid rgba(255,255,255,.08)}
.header-inner{max-width:1360px;margin:0 auto;height:74px;display:flex;align-items:center;justify-content:space-between;padding:0 44px;gap:24px}
.logo{height:54px;display:flex;align-items:center}
.logo img{height:54px;max-width:190px;object-fit:contain;display:block}
.nav{display:flex;gap:42px;color:#fff;font-size:16px;align-items:center;white-space:nowrap}
.nav a{opacity:.92}
.nav a:hover{opacity:1;color:#b9dcff}
.icons{display:flex;gap:18px;color:#fff;opacity:.9;font-size:20px}
.hero{min-height:610px;position:relative;overflow:hidden;background:#071629}
.hero:before{content:"";position:absolute;inset:0;background:url("img/hero-galaxy7.jpg") center/cover no-repeat;filter:saturate(1.04)}
.hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.48),rgba(0,20,55,.12) 45%,rgba(0,32,82,.62))}
.hero-content{position:relative;z-index:2;max-width:1360px;margin:0 auto;padding:150px 44px 70px;min-height:610px;display:flex;justify-content:flex-end;align-items:center;text-align:right;color:white}
.hero-box{max-width:680px}
.hero-title{font-size:58px;line-height:1.12;font-weight:400;letter-spacing:1px;margin:0 0 22px}
.hero-line{width:310px;height:1px;background:rgba(255,255,255,.85);margin:0 0 28px auto}
.hero-sub{font-size:22px;line-height:1.8;margin:0 0 54px;color:#e8f1ff}
.hero-button{display:inline-flex;align-items:center;gap:14px;padding:17px 45px;border:1px solid rgba(255,255,255,.82);border-radius:10px;color:white;font-size:18px;background:rgba(255,255,255,.06)}
.hero-button:hover{background:rgba(255,255,255,.16)}
.container{max-width:1260px;margin:0 auto;padding:58px 34px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:30px}
.section-kicker{color:var(--blue);font-size:13px;font-weight:800;letter-spacing:2.5px;text-transform:uppercase}
.section-title{font-size:38px;line-height:1.2;margin:10px 0 0;font-weight:600;color:#172033}
.section-desc{max-width:590px;color:var(--muted);line-height:1.75;margin:0;font-size:16px}
.category-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}
.category-card{min-height:310px;border-radius:2px;overflow:hidden;position:relative;background:#071629;box-shadow:0 16px 34px rgba(16,24,40,.12);transition:.2s ease}
.category-card:hover{transform:translateY(-4px);box-shadow:0 22px 46px rgba(16,24,40,.18)}
.category-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:.3s ease}
.category-card:hover img{transform:scale(1.035)}
.category-card:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.08),rgba(0,15,38,.80))}
.category-content{position:absolute;left:34px;right:34px;bottom:30px;z-index:2;color:white}
.category-content h3{font-size:34px;font-weight:400;margin:0 0 12px}
.category-content p{font-size:16px;line-height:1.65;margin:0;color:#dbe9ff}
.more{margin-top:24px;display:inline-flex;align-items:center;gap:14px;color:#fff;border:1px solid rgba(255,255,255,.72);padding:11px 22px;border-radius:7px}
.breadcrumb{font-size:14px;color:#667085;margin-bottom:26px}
.breadcrumb a{color:#0059b2;font-weight:700}
.panel{background:#fff;border:1px solid var(--lightline);box-shadow:0 14px 34px rgba(16,24,40,.08);padding:34px}
.product-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.product-card{border:1px solid var(--lightline);background:white;overflow:hidden;transition:.2s ease}
.product-card:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(16,24,40,.12)}
.product-card .pic{height:190px;position:relative;overflow:hidden;background:#06162e}
.product-card img{width:100%;height:100%;object-fit:cover;display:block}
.product-body{padding:22px}
.product-body h3{font-size:25px;font-weight:500;margin:0 0 10px;color:#162033}
.product-body p{font-size:15px;line-height:1.7;color:#667085;margin:0}
.link-line{margin-top:20px;color:#0059b2;font-weight:700}
.cert-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.cert-item{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 22px;background:#fff;border:1px solid var(--lightline);transition:.18s ease}
.cert-item:hover{border-color:#89bce8;box-shadow:0 12px 28px rgba(16,24,40,.11)}
.cert-left{display:flex;align-items:center;gap:15px;min-width:0}
.cert-no{width:48px;height:48px;background:#eaf4ff;color:#0059b2;display:flex;align-items:center;justify-content:center;font-weight:900}
.cert-name{font-size:18px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cert-meta{font-size:13px;color:#667085;margin-top:5px}
.cert-arrow{font-size:28px;color:#0059b2}
.toolbar{display:flex;gap:12px;justify-content:space-between;align-items:center;flex-wrap:wrap;margin-bottom:20px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border:1px solid #cdd8e6;color:#0059b2;background:#fff;font-weight:700;border-radius:2px}
.btn.primary{background:#0059b2;color:white;border-color:#0059b2}
.viewer{background:#fff;border:1px solid var(--lightline);box-shadow:0 14px 34px rgba(16,24,40,.08);padding:24px}
.viewer h2{font-size:30px;color:#172033;font-weight:500;margin:4px 0 20px}
.cert-img{display:block;width:100%;max-width:980px;height:auto;margin:0 auto;border:1px solid #d5dde8;background:white}
.note{color:#667085;line-height:1.7;font-size:14px;margin-top:18px}
.footer{background:#050914;color:#b5c2d6;padding:34px 44px;text-align:center;font-size:13px;line-height:1.8}
@media(max-width:900px){
  .header{height:66px}.header-inner{height:66px;padding:0 18px}.logo img{height:46px}.nav{display:none}.icons{display:none}
  .hero{min-height:520px}.hero-content{padding:88px 22px 52px;min-height:520px;align-items:flex-end}.hero-title{font-size:42px}.hero-sub{font-size:18px}.hero-line{width:230px}
  .container{padding:40px 18px}.section-head{display:block}.section-title{font-size:30px}.section-desc{margin-top:14px}
  .category-grid,.product-grid,.cert-list{grid-template-columns:1fr}.category-card{min-height:260px}.panel{padding:22px}
}