.position{
    width: 100%;
    height: 54px;
    background: #f2f2f2;
}
.pos-box{
    text-align: left;
    line-height: 54px;
}
.pos-box .dw{
    height: 15px;
    background: url(../images/24.png) no-repeat;
    border-left: 0px solid #3399ff;
    vertical-align: middle;
}
.pos-box a:hover{
    color: rgba(51, 51, 51, 0.719);
}
.aboutus_img,.aboutus_text{
    width: 50%;
}
.aboutus_text{
    text-align: left;
    padding-left: 5%;
}
hr{
    background-color: #e6e6e6;
    height: 1px;
    margin: 10px 0;
    border: 0;
    clear: both;
}
.advantage_item{
    width: 21.667%;
    height: 138px;
    float: left;
    margin-right: 53px;
    margin-top: 160px;
}
.advantage_item:nth-of-type(4n){
    margin-right: 0;
}