body{
    background-color: #fff;
}
header .nav li:nth-child(1) a span {
    color: #34A0D5;
    border-bottom: 2px solid #34A0D5;
}
.serviceNav li:nth-child(6) a{
    color: #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: 100px;
}
.item {
    margin-top: 100px;
}
.item .left{
    float: left;
}
.item .right{
    float: right;
}
.item img{
    width: 480px;
    height: 320px;
}
.item h1{
    color: #444;
    font-size: 40px;
    font-weight: bold;
}
.item p{
    color: #666;
    line-height: 32px;
    width: 480px;
    text-align: justify;
    margin-top: 20px;
}