.cc_advantage {
    width: 100%;
    background-image: url("../images/advantage_bg.jpg");
    background-size: 100% auto;
    background-repeat: no-repeat;
    background-position: top center;
    padding-top: 140px;
    margin-top: -84px;
    padding-bottom: 20px;
}

.advantage_Item {
    width: 33.3%;
    float: left;
    height: 700px;
    background: #25a3f8;
    position: relative;
}
.advan_on{
    position: absolute;
    top: 0;
}
.advan_off{
    position: absolute;
    top: 0;
}

@media (max-width: 1200px) {
    .cc_advantage {
        width: 100%;
        background-size: auto 80%;
        background-repeat: no-repeat;
        background-position: top center;
        padding-top: 20px;
        padding-bottom: 20px;
      display:none;
    }
    .advantage_Item{
        height: auto;
    }
}