.fourScreen{
    background-color: #ffffff;
    overflow:hidden;
}
.fourBox{
    width: 1209px;
    height: 620px;
    margin: 100px auto;
    margin-bottom: 0;
    background-image: url(http://qiniuimage.shengyaapp.com/H5/image/enterpriseWebsite/th/4%E5%B1%8F%E6%89%8B%E6%9C%BA.png);
    background-repeat: no-repeat;
    background-color: #ffffff;
    background-size: 100%;
    padding-top: 1px;
    display: flex;
}
.cgbt{
    width: 750px;
    height: 250px;
    text-align: center;
    margin-top: 220px;
}
.cgbtImg{
    opacity: 0;
}
.btxq{
    width: 430px;
    height: 250px;
    text-align: center;
    margin-top: 270px;
}
.btxqImg{
    opacity: 0;
}