.biaoti{
    margin-top: 6%;
    margin-bottom:6%;
    width: 100%;
    /* border: 1px solid red; */
    position: relative;
}
.bt_l{
position: absolute;
left: 20%;
    width: 20%;
    top: 18px;
    border: 2px solid #C7C7C7
}
.bt_r{
    position: absolute;
    right: 20%;
        width: 20%;
        top: 18px;
        border: 2px solid #C7C7C7
    }

.biaoti h1{
    color: #C7C7C7;
    text-align: center
}

.content{
    width: 100%;
    /* height: 600px; */
    /* background-color: #000 */
}
.cont_z{
    width: 60%;
    height: 100%;
    background-color: #f4f8fb
}
.cont_z img{
    width: 100%;
    margin-bottom: 15%
}