.prst_lianxi_bg img {
    max-width: 58%;
}
.map {
    border: none;
}
.about_us {
    margin-top: 100px!important;
    background: none!important;
}
.map {
    float: left;
    margin-left: 6%;
}
.prst_lianxi_bg dl dd {
    float: none;
}
.prst_lianxi_bg {
    background: none;
    float: right;
    width: 30%;
}