*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:"Microsoft YaHei",sans-serif;
}
.container{
    width:1200px;
    margin:0 auto;
    max-width:95%;
}
/*导航头部*/
.header{
    background:#ffffff;
    box-shadow:0 2px 8px #00000018;
}
.navbar{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:12px 0;
}
.nav-menu a{
    margin-left:32px;
    text-decoration:none;
    color:#333;
    font-size:16px;
}
.nav-menu a.active{
    color:#0066aa;
    font-weight:bold;
}
.nav-menu a:hover{
    color:#0077cc;
}
/*内容区域*/
.home-content,.content{
    padding:50px 0;
    line-height:1.8;
    color:#333;
    font-size:16px;
}
h2{
    font-size:28px;
    margin-bottom:20px;
    color:#222;
}
h3{
    font-size:22px;
    margin:24px 0 12px;
    color:#222;
}
ul{
    padding-left:22px;
    margin-bottom:16px;
}
.product-list{
    display:grid;
    grid-template-columns:1fr 1fr 1fr;
    gap:24px;
    margin-top:30px;
}
.product-item{
    border:1px solid #eee;
    padding:24px;
    border-radius:8px;
}
.product-item a{
    color:#0066aa;
    text-decoration:none;
    margin-top:10px;
    display:inline-block;
}
.case-item{
    border-left:4px solid #0066aa;
    padding:16px 20px;
    margin-bottom:20px;
    background:#f8fafc;
}