.bj{
    background: url("http://cpsmedia.oss-cn-shenzhen.aliyuncs.com/uploadfile/2017/0630/uav-bj.jpg") no-repeat top center;
    background-size:cover;
    width: 100%;
    margin-bottom: 40px;
}

@media screen and (max-width:750px) {
    .bj{
        background: url("http://cpsmedia.oss-cn-shenzhen.aliyuncs.com/uploadfile/2017/0630/bj-uav.jpg") no-repeat top center;
        background-size: cover;
        margin-bottom: 40px;
    }
}
    .top_bg{
    padding-top: 350px;
}
.row .line_bold{
    height: 2em;
    text-align: center;
    background-color: #3464ae;
}
.row .line .title{
    display: inline-block;
    background-color: #fff;
    padding: 0 20px;
    font: 1.8em "microsoft yahei";
    font-weight: bold;
    color: #3464ae;
}
.row .line_bold .title{
    display: inline-block;
    background-color: #fff;
    padding: 0 20px;
    font: 1.8em "microsoft yahei";
    font-weight: bold;
    color: #3464ae;
}
.mr_top{
    margin-top:30px;
}
.mr-bt{
    margin-bottom:30px;
}
p{
    line-height: 26px;
    padding:0 20px;
    font-size: 16px;
}
.p-wenzi2{
    padding-top: 30px;
}

.bj2{
    background: #fafafa;
}
.text02,.text03{
    background: #ffe0e0;
    line-height: 34px;
    font-size: 16px;
    padding: 10px 10px 0 20px;
}
.text03{
    background: #eeeeee;

    padding-bottom: 95px;
}
h4{
    font-weight: bold;
}
.tw_bt{
    font-size: 24px;
    color: #fff;
    background: #278dbe;
}
.pd_bt{
    padding-bottom: 55px;
}

footer{
    text-align: center;
    padding: 1em;
    border-top:2px solid #0f5dc8;

}
footer ul{
    display: inline-block;
}