@media screen and (max-width:1200px) {

    /* 第一屏 */
    .back {
        width: fit-content;
        height: 100%;
        position: absolute;
        /*  left: 50%;
        transform: translateX(-50%);*/
    }

    .back video {
        /*      position:absolute;*/
        top: 0;
        bottom: 0;
        right: 0;
        left: 0;
    }

    .back img {
        width: fit-content;
        height: 100%;
    }

    /* 第二屏 */
    .newlist {
        margin-top: 60px;
    }

    .newleft {
        width: 50%;
        padding-right: 10px;
    }

    .newright {
        padding-left: 10px;
    }

    .newitem {
        height: 50px;
        line-height: 50px;
        padding: 0px 10px;
    }

    .star {
        width: 20px;
        height: 20px;
        margin-top: 15px;
    }

    .newtext {
        padding-left: 10px;
    }

    .newright a:nth-last-child(3) {
        display: none;
    }

    .newright a:nth-last-child(2) {
        display: none;
    }

    .newright a:nth-last-child(1) {
        display: none;
    }

    /* 第三屏 */
    .little {
        margin: 60px -5px 0px -5px;
    }

    .more2 {
        display: none;
    }

    .prosys {
        padding: 0px 5px;
    }

    .prolist {
        margin-left: -5px;
        margin-right: -5px;
    }

    .proitem {
        padding: 0px 5px;
    }


}

@media screen and (max-width:700px) {
    .back img {
        width:100%
    }

    /* 第二屏 */

    .navbtn {
        right: 10px;
        top: 10px;
        width: 20px;
        height: 20px;
    }

    .navbtn img {
        width: 20px;
        height: 20px;
    }

    .maintitle {
        font-size: 18px;
    }

    .news .maintitle {
        text-align: right;
    }

    .maintitle::after {
        height: 3px;
    }

    .ehtitle {
        margin-top: 30px;
        font-size: 16px;
    }

    .more {

        height: 30px;
        line-height: 30px;
        padding: 0px 10px;
        font-size: 14px;
    }

    .moretext {
        transform: translateY(-10px);
    }

    .moreicon {
        transform: translateY(0px);
    }

    .newlist {
        margin-top: 40px;
    }

    .newleft {
        width: 100%;
        padding-right: 0px;
    }


    .hottext {
        float: right;
        font-size: 14px;
        box-sizing: border-box;
        padding-left: 10px;
        width: 60%;
    }

    .hotimg {
        width: 40%;
        float: left;
        margin-top: 20px;
    }

    .newright {
        padding-top: 20px;
        width: 100%;
        padding-left: 0px;

    }

    .newitem {
        height: 40px;
        line-height: 40px;
        padding: 0px 10px;
        margin: 5px 0px;
    }

    .star {
        margin-top: 10px;
    }

    .newtext {
        font-size: 14px;
        padding-left: 10px;
    }

    /* 第三屏 */
    .little {
        margin: 60px -0 0px -0;
        text-align: left;
    }

    .prosys {
        padding: 5px 5px;
        width: 33.3%;
    }

    .protitle {
        height: 40px;
        line-height: 40px;
       
    }

    .proicon {
        display: none;
    }
  
    .proname {
        font-size: 14px;
    }
    .newblock{
        padding: 10px 0px;
        border-radius: 5px;
    }
    .prolist {
        margin-left: -5px;
        margin-right: -5px;
    }

    .arr {
        display: none;
    }

    .proitem {
        width: 50%;
        float: left;
        padding: 5px 5px;
    }

    /* 第四屏 */
    .meitem {
        width: 33.3%;
    }

    .meintro {
        display: none;
    }

    .more2 {
        display: none;
    }

    .meitemn {
        display: none;
    }

    /* 第五屏 */
    .serlist {
        margin: 40px -5px 0px -5px;
    }

    .seitem {
        width: 50%;
        padding: 5px 5px;
    }

    .seinner {
        padding: 15px 10px;
    }

    .seleft {
        width: 20px;
        height: 20px;
        padding-right: 10px;
    }

    .seleft img {
        width: 20px;
        height: 20px;
    }

    .seright {
        padding-left: 10px;
    }

    .setitle {
        font-size: 16px;
        line-height: 20px;
    }

    .setext {
        margin-top: 10px;
        font-size: 12px;
        line-height: 24px;
        height: 48px;
        -webkit-line-clamp: 2;
    }
    /* 数字产品 */
    .serlist{
        margin: 0 0 0 0;
    }
    .seitem{
        width: 100%;
        padding: 0;
    }
    .seinner{
        padding-bottom: 150px;
        margin: 10px 0px;
        box-sizing: border-box;
    }

    .bottom {
        margin-top: 20px;
        font-size: 12px;
        line-height: 20px;
    }

    .picon {
        width: 16px;
        height: 16px;
        transform: translateY(3px);
    }

    .picon img {
        width: 16px;
        height: 16px;
    }

    .botext2 {
        padding-bottom: 10px;
    }

}



@media screen and (max-width:400px) {
    .bolast {
        display: none;
    }

    .botext2 {
        border-bottom: 0;
    }
}

@media screen and (max-width:350px) {
    .edulist a:nth-last-child(2) {
        display: none;
    }

    .bottom {
        display: none;
    }
}