*{box-sizing:border-box;margin:0;padding:0;font-family:Arial, sans-serif;} 
img{max-width:100%;height:auto;display:block;} .container{width:90%;max-width:1200px;margin:0 auto;} 
.header{background:#222;color:#fff;padding:18px 
0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:15px;} 
.logo{font-size:24px;font-weight:bold;} .lang-switch a{color:#fff;margin:0 6px;text-decoration:none;} 
.banner{background:#34495e;color:#fff;padding:90px 
0;text-align:center;background-image:url(https://images.unsplash.com/photo-1530210124550-912dc1381cb8?w=1600);background-size:cover;background-position:center;} 
.banner h1{font-size:42px;margin-bottom:18px;} .banner p{font-size:18px;margin-bottom:25px;} 
.btn{display:inline-block;background:#ff6600;color:#fff;padding:14px 
28px;border-radius:4px;text-decoration:none;font-weight:bold;} 
.btn-sm{display:inline-block;background:#222;color:#fff;padding:8px 
16px;border-radius:3px;text-decoration:none;margin-top:10px;font-size:14px;} .about{padding:70px 0;} .about 
h2{text-align:center;font-size:30px;margin-bottom:35px;} .about-wrap{display:grid;grid-template-columns:1fr 
1fr;gap:30px;align-items:center;} .products{background:#f8f8f8;padding:70px 0;} .products 
h2{text-align:center;font-size:30px;margin-bottom:40px;} 
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px;} 
.product-card{background:#fff;padding:18px;border-radius:6px;box-shadow:0 2px 8px #ddd;} .product-card 
img{margin-bottom:15px;} .product-card h3{margin-bottom:10px;color:#222;} .contact{padding:70px 0;} .contact 
h2{text-align:center;font-size:30px;margin-bottom:30px;} input,textarea{width:100%;padding:14px;margin:9px 
0;border:1px solid #ccc;border-radius:4px;font-size:16px;} textarea{min-height:140px;} button{padding:14px 
30px;background:#ff6600;color:#fff;border:none;cursor:pointer;font-size:17px;border-radius:4px;} 
footer{background:#222;color:#fff;text-align:center;padding:25px 0;margin-top:30px;} /*图片放大弹窗样式*/ 
.modal{display:none;position:fixed;z-index:9999;padding-top:100px;left:0;top:0;width:100%;height:100%;overflow:auto;background:rgba(0,0,0,0.9);} 
.modal-content{margin:auto;display:block;max-width:90%;max-height:90vh;} 
.close-modal{position:absolute;top:20px;right:35px;color:#fff;font-size:40px;font-weight:bold;cursor:pointer;} 
.zoom-img{cursor:pointer;transition:0.3s;} .zoom-img:hover{opacity:0.85;} 
.gallery-row{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-top:15px;} 
.detail-wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:flex-start;} 
.product-detail{padding:70px 0;} .detail-info ul{padding-left:20px;margin:15px 0;line-height:1.8;} 
/*主导航菜单*/ .main-nav{display:flex;gap:24px;} .main-nav a{color:#fff;text-decoration:none;font-size:16px;} 
.main-nav a:hover{color:#ff6600;} @media(max-width:768px){
  .about-wrap,.product-grid,.detail-wrap,.gallery-row{grid-template-columns:1fr;} .banner h1{font-size:28px;} 
  .main-nav{width:100%;order:3;margin-top:10px;gap:16px;}
}