header .nav li:nth-child(3) a span {
    color: #34A0D5;
    border-bottom: 2px solid #34A0D5;
}
/*banner开始*/
.banner{
    height: 450px;
    overflow: hidden;
}
.banner .neikuan{
    position: relative;
    height: 100%;
}
.banner img{
    width: 1920px;
    height: 450px;
    position: absolute;
    margin-left: -420px;
}
/*main开始*/
.main{
    margin-bottom: 20px;
}
.list li{
    float: left;
    width: 350px;
    height: 350px;
    background: #fff;
    margin-top: 20px;
    transition: 0.2s;
    text-align: center;
}
.list li:nth-child(3n+2){
    margin-left: 15px;
    margin-right: 15px;
}
.list li a{
    display: block;
    width: 100%;
    height: 100%;
}
.list li:hover{
    transform: scale(1.05);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.13);
}
.list li img{
    width: 80px;
    height: 80px;
    margin-top: 102px;
}
.list li .xian{
    width: 20px;
    height: 2px;
    background: #000;
    margin: 20px auto;
}
.list li h1{
    color: #333;
    font-size: 24px;
}