.nav h1{
    width: 900px;
    margin: 0 auto;
    font-weight: normal;
    font-size: 28px;
}
.nav{
    background: #426ac6;
    line-height: 80px;
    color: #fff;
    height: 80px;
}
.banner img{
    width: 100%;
    height: auto;
}
.list{
    background: #fff;
    margin: 85px auto;
    width: 900px;
}
.list li{
    width: 140px;
    text-align: center;
    color: #666666;
    float: left;
    margin: 0 42px;
}
.list li img{
    width: 98px;
    height:98px;
}
.list li .desc_1{
    font-size:26px;
    margin: 39px auto 10px;
}
.list li .desc_2{
    font-size:14px;
}
.list_top{
    height: 56px;
    background: #666666;
}
.list_top h3{
    width: 900px;
    margin: 0 auto;
    color:#fff ;
    line-height: 56px;
    font-weight: normal;
    font-size: 26px;
}
.case {
    background: #426ac6;
    padding: 42px 0 28px;
}
.case ul{
    width: 900px;
    margin: 0 auto;
}
.case li{
    width: 298px;
    height: 200px;
    float: left;
    position: relative;
    cursor: pointer;
}
.case li img{
    width: 100%;
    height: 100%;
}
.case li p{
    position: absolute;
    bottom:0;
    background: rgba(0,0,0,.5);
    width: 100%;
    height:25px;
    line-height: 25px;
    text-align: center;
    color: #fff;
}
.consultation{
    width: 1126px;
    display: flex;
    display: -webkit-flex;
    margin: 50px auto;
    justify-content: space-between;
}
.consultation li{
    width:364px;
    height: 164px;
    cursor: pointer;
}
.maintenance{
    text-align: center;
    margin: 70px auto 60px;
}
.maintenance img{
    width:640px ;
    height:639px;
}
.media{
    background: #666666;
    padding: 29px 0;
}
.media h3{
    margin: 0 auto;
    width: 875px;
    padding-left: 25px;
    font-size: 20px;
    font-weight: normal;
    line-height:30px;
    color: #fff;
}
.media ul{
    margin: 10px auto 0;
    width: 875px;
    padding-left: 25px;
}
.media ul li{
    float: left;
    margin-right: 27px;
}
.recruit{
    text-align: center;
    color: #999999;
    margin-bottom: 37px;
}
.recruit img{
    width: 98px;
    height: 111px;
    margin:46px auto 28px;
}
.recruit_title{
    font-size: 30px;
    margin-bottom: 27px;
}
.recruit_desc{
    font-size: 18px;
    margin-bottom:12px ;
}
.footer{
    background: #fafafa;
    color: #666666;
}
.footer_con{
    width: 900px;
    margin: 0 auto;
    padding: 37px 0 40px;
}
.footer .contact_us{
    width: 300px;
    padding-left: 120px;
    float: left;
}
.footer .contact_us li{
    float: left;
    width: 50px;
    margin-left:50px;
    cursor: pointer;
}
.footer .address{
    float: left;
    line-height: 24px;
    padding-left: 63px;
}