@media (min-width: 0px) and (max-width:750px) {
    * {
        margin: 0;
        padding: 0;
        border: 0;
    }
    div{
        margin: 0;
        padding: 0;
        border: 0;
       
    }
    ul li{
        list-style: none;
    }
    .w {
        /* width: 100%; */
        margin: 0 auto;
    }
    .imageclass{
        display: none;
    }
    header {
        /* width: 100%; */
        height:4.6667rem;
        /* min-width: 100%; */
        /* background-image: url("../aiimage/Eye-protection/minibanner.png"); */
        background-size: 100% 100%;
        position: relative;
    }
    .phoneimageclass{
        width: 100%;
        height: 4.6667rem;
    }
    .phonew{
        position: absolute;
        top: .8rem;
        left: .6667rem;
        width: 4.9rem;
       
    }
    .title_one{
        font-family: Alibaba PuHuiTi;
        font-weight: 500;
        font-size: .48rem;
        color: #FFFFFF;
    }
    .xian_one{
        width: 1.3333rem;
        height: .0533rem;
        background: #F5F2F6;
        margin: .25rem 0 0.3rem;
  
    }
    .content{
        font-family: Alibaba PuHuiTi;
        font-weight: 400;
        font-size: .2133rem;
        color: #FFFFFF;
        line-height: .4rem;
    }
    .start_left_img{
        width: .2667rem;height: .2667rem;margin-right: .1067rem;
    }
    .start_right_img{
        width: .2667rem;height: .2667rem;margin-left: .1067rem;
    }
    .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;
    }
    .section_one{
        width: 100%;
        /* height: 15.6667rem; */
        background-image: url("../aiimage/Eye-protection/minibg.png");
        background-size: 100% 100%;
        padding: .6533rem .4rem;
        box-sizing: border-box;
    }
    .section_one ul{
        margin-top: .4rem;
    }
    .section_one ul li{
        width: 9.2rem;
        height: 2.4533rem;
         /* 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);
         margin-bottom: .4rem;
         padding: .48rem .4rem .48rem  .3467rem;
         box-sizing: border-box;
    }
    .section_one ul li:first-child{
        padding: .2rem .4rem .2rem .3467rem;
        box-sizing: border-box;
    }
    .section_one ul li:nth-child(4){
        padding: .2rem .4rem .2rem .3467rem;
        box-sizing: border-box;
    }
    .section_one ul li:last-child{
        margin-bottom: 0;
    }
    .section_one ul li img{
        width: 1.3067rem;
        height: 1.4533rem;
        float: left;
        margin-right: .2667rem;
    }
    .section_one ul li:first-child img,.section_one ul li:nth-child(4) img{
        margin-top: .1467rem;
    }
    .section_one ul li h2{
        font-family: PingFang SC;
        font-weight: 500;
        font-size: .4rem;
        color: #333333;
    }
    .section_one ul li p{
        font-family: PingFang SC;
        font-weight: 400;
        font-size: .2933rem;
        color: #333333;
        margin-top: .08rem;
    }
    nav{
        padding: 0 0.4rem;
        box-sizing: border-box;
    }
}