*{margin:0;padding:0;box-sizing:border-box;font-family:"Microsoft Yahei",sans-serif;}
.container{width:1200px;margin:0 auto;max-width:95%;}
a{text-decoration:none;color:#333;}
ul{list-style:none;}
.btn{display:inline-block;background:#0066ff;color:#fff;padding:12px 28px;border-radius:6px;margin-top:16px;transition:0.3s;}
.btn:hover{background:#0044bb;}
.title{text-align:center;font-size:28px;margin-bottom:40px;color:#222;}
.section{padding:60px 0;}

/*导航*/
.header{background:#fff;box-shadow:0 2px 8px #eee;position:sticky;top:0;z-index:99;}
.nav-wrap{display:flex;justify-content:space-between;align-items:center;height:70px;}
.logo{font-size:22px;font-weight:bold;color:#0066ff;}
.nav{display:flex;gap:32px;}
.nav a:hover{color:#0066ff;}

/*横幅banner*/
.banner{height:460px;background:#224488;color:#fff;display:flex;align-items:center;}
.banner-text h1{font-size:42px;margin-bottom:12px;}
.banner-text p{font-size:18px;opacity:0.9;}

/*产品列表*/
.product-list{display:grid;grid-template-columns:1fr 1fr 1fr;gap:30px;}
.product-item{background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 3px 12px #e8e8e8;transition:0.3s;}
.product-item:hover{transform:translateY(-6px);}
.product-img{
    height:260px;
    background:#ffffff;
    display:flex;
    align-items:center;
    justify-content:center;
}
.product-img img{
    max-width:90%;
    max-height:90%;
}
.product-item h3{padding:16px 16px 8px;font-size:18px;}
.product-item p{padding:0 16px 20px;color:#666;font-size:14px;line-height:1.6;}

/*关于我们*/
.about{background:#f8f9fa;}
.about-text{line-height:1.8;font-size:16px;color:#444;max-width:900px;margin:0 auto;text-align:center;}

/*联系我们*/
.contact-info{text-align:center;font-size:17px;line-height:2.2;color:#333;}

/*页脚*/
.footer{background:#222;color:#aaa;text-align:center;padding:24px 0;font-size:14px;}

/*移动端适配*/
@media(max-width:768px){
    .nav-wrap{flex-direction:column;height:auto;padding:12px 0;gap:12px;}
    .product-list{grid-template-columns:1fr;}
    .banner{height:340px;}
    .banner-text h1{font-size:30px;}
}