@media (min-width: 0px) and (max-width:750px) {
    * {
        margin: 0;
        padding: 0;
        border: 0;
    }
    div{
        margin: 0;
        padding: 0;
        border: 0;
    
    }
    .w {
        width: 100%;
        margin: 0 auto;
    }
    ul li{
        list-style: none;
    }
    .imageclass{
        display: none;
    }
    header{
        width: 100%;
        height: 4.6667rem;
        /* background-image: url("../aiimage/studentcard/phonebg.png"); */
        background-size: 100% 100%;
        position: relative;
    }
    .phoneimageclass{
        width: 100%;
        height: 4.6667rem;
    }
    .phonew{
        position: absolute;
        top: 1rem;
        left: .6667rem;
        width: 5.0267rem;
    }
    .title_one{
        font-family: PingFang SC;
        font-weight: 500;
        font-size: .48rem;
        color: #FFFFFF;
    }
    .xian_one{
        width: 1.3333rem;
        height: .0533rem;
        background: #F5F2F6;
        margin: .3rem 0 0.4rem;
    }
    .content{
        font-family: PingFang SC;
        font-weight: 400;
        font-size: .2133rem;
        color: #FFFFFF;
        line-height: .4rem;
    }
    .neirongbox{
        width: 100%;
        height: 14.6533rem;
        background-image: url("../aiimage/studentcard/centerbg.png");
        background-size: 100% 100%;
    }
    .cardtitle{
        font-family: Alibaba PuHuiTi;
        font-weight: 500;
        font-size: .4267rem;
        color: #333333;
        text-align: center;
        display: flex;
        align-items: center;
        justify-content: center;
        height: .3467rem;
    }
    .cardbox{
        height: 100%;
        padding: .6rem 0 .6533rem 0;
        box-sizing: border-box;
    }
    .cardlistbox{
        display: flex;
        flex-wrap: wrap;
        margin-top: .4rem;
        padding: 0 .4rem;
        box-sizing: border-box;
    }
    .cardlist{
        width: 4.4667rem;
        height: 4rem;
        background: linear-gradient(90deg, #EEF9FF, #F4F9FD);
        /* border-image: linear-gradient(0deg, #FFFFFF, #E9F6FD) 1 1; */
        border-radius: .1333rem;
        display: flex;
        align-items: center;
        flex-direction: column;
        margin: 0 .2667rem .2667rem 0;
        padding: .36rem .3rem 0;
        box-sizing: border-box;
        text-align: center;
        /* 边框渐变 */
        border: .0133rem solid transparent;
        border-radius: .1333rem;
        background-clip: padding-box, border-box;
        background-origin: padding-box, border-box;
        background-image: linear-gradient(-90deg, #EEF9FF, #F4F9FD),linear-gradient(0deg, #FFFFFF, #E9F6FD);
    }
    .cardlist:nth-child(2n){
        margin-right: 0;
    }
    .cardlisttitle{
        font-family: PingFang SC;
        font-weight: 500;
        font-size: .4rem;
        color: #333333;
        margin: .25rem 0 0.15rem;
    }
    .cardbottom{
        font-family: PingFang SC;
        font-weight: 400;
        font-size: .2933rem;
        color: #333333;
    }
    .cardlistimg{
        width: 1.3067rem;
        height: 1.4533rem;
    }
    .neibottom{
        width: 100%;
        height: 9.72rem;
        background: #F6F8FB;
        padding: .6533rem 0;
        box-sizing: border-box;
      
    }
    .bottombox{
        padding: 0 0.4rem;
        box-sizing: border-box;
        margin-top: 0.4rem;
    }
    .bottom_list{
        width: 9.2rem;
        height: 2.2667rem;
        background: #FFFFFF;
        box-shadow: 0rem .08rem .08rem 0rem rgba(7,64,102,0.09);
        border-radius: .2667rem;
        margin-bottom: 0.4rem;
    }
    .bottom_list:nth-child(3n) {
        margin-bottom:0;
    }
    .bottom_top{
        width: 100%;
        height: 1.04rem;
        background: linear-gradient(86deg, #3D93FD, #29C7FB);
        border-radius: .2667rem .2667rem 0rem 0rem;
        display: flex;
        padding: .1067rem .2667rem;
        box-sizing: border-box;
        justify-content: space-between;
        align-items: center;
    }
    .bottom_toptitle{
        font-family: PingFang SC;
        font-weight: 500;
        font-size: .4rem;
        color: #FFFFFF;
    }
    .sysline{
        width: .3333rem;
        height: .04rem;
        background: #FFFFFF;
        margin-top: .0133rem;
    }
    .Systembox_bottom{
        width: 100%;
        padding: .2667rem .2133rem 0 .2533rem;
        box-sizing: border-box;
        display: flex;
    }
    .Systembox_list_img{
        width: .3867rem;
        height: .3067rem;
        margin-right: .1333rem;
        margin-top: .08rem;
    }
    .Systembox_list_text{
        font-family: PingFang SC;
        font-weight: 400;
        font-size: .3467rem;
        color: #333333;
    }
    .leard_img{
        width: .7733rem;
        height: .6933rem;
    }
    .ding_img{
        width: .64rem;
        height: .7333rem;
    }
    .sos_img{
        width: .8rem;
        height: .8rem;
    }
    .start_left_img{
        width: .2667rem;height: .2667rem;margin-right: .1067rem;
    }
    .start_right_img{
        width: .2667rem;height: .2667rem;margin-left: .1067rem;
    }
    nav{
        padding: 0 0.4rem;
        box-sizing: border-box;
    }
}