@media screen and (max-width:768px) {
    .zzqdgllq{
        background: url(../images/yixuepaiyushangwu/zhenzhengqiangda_mb_sm.jpg) no-repeat 50% -170px !important;
    }
    .zzqdgllq_bt{
        margin: 40px auto 20px auto !important;
    }
    .cphpt_bg{
        background: url(../images/yixuepaiyushangwu/chanpinhepingtai_mb.jpg) no-repeat 50% 0px;
            background-size: cover !important;
    }
    .cphpt{
        margin: 40px 6% auto auto !important;
        width: 90% !important;
    }
    .hzhb_bg{
        background-size: cover !important;
        height: 700px !important;
        background: url(../images/yixuepaiyushangwu/hezuohuoban_mb.jpg) no-repeat 50% 0px;
    }
    .hzhb{
        margin: 40px 6% auto auto !important;
        float: right !important;
        width: 90% !important;
    }
}
@media screen and (min-width: 769px) and (max-width:992px) {
    .zzqdgllq{
        background: url(../images/yixuepaiyushangwu/zhenzhengqiangda_mb.jpg) no-repeat 50% 0px;
    }
    .cphpt_bg{
        background: url(../images/yixuepaiyushangwu/chanpinhepingtai_mb.jpg) no-repeat 50% 0px;
    }
    .hzhb_bg{
        background: url(../images/yixuepaiyushangwu/hezuohuoban_mb.jpg) no-repeat 50% 0px;
    }
}

@media screen and (min-width:993px) {
    .zzqdgllq{
        background: url(../images/yixuepaiyushangwu/zhenzhengqiangda_pc.jpg) no-repeat 50% 30%;
        background-size: cover !important;
    }
    .cphpt_bg{
        background-size: cover !important;
        background: url(../images/yixuepaiyushangwu/chanpinhepingtai.jpg) no-repeat 50% 30%;
    }
    .hzhb_bg{
        background-size: cover !important;
        background: url(../images/yixuepaiyushangwu/hezuohuoban_pc.jpg) no-repeat 50% 30%;
    }
}
.zzqdgllq{
    height: 1200px;
    margin-top: 60px;
}
.zzqdgllq_bt{
    margin: 70px auto 20px auto;
    padding: 0 40px 0 40px;
    max-width: 960px;
}
.zzqdgllq_zw{
    padding: 0 40px 0 40px;
}

.cphpt_bg{
    height: 1200px;
}
.cphpt{
    margin-top: 100px;
    margin-right: 40px;
    width: 600px;
    float: right;
}
.cphpt_bt{
    margin: 20px auto 20px auto;
}


.hzhb_bg{
    height: 1200px;
}
.hzhb{
    margin: 100px 0 0 40px;
    width: 600px;
    float: left;
}