@media(max-width:1440px) {
    .m {
        padding: 0 9rem
    }

    #foot .box1 {
        gap: 3.5rem
    }

    .s_news .bd .right {
        width: 34.5rem
    }

    .s_news01 ul li .img {
        width: 17rem;
        height: 10.5rem
    }

    .s_news02 .img {
        height: 21.6875rem
    }

    .n_xiangmu ul {
        gap: 3.5rem
    }

    .n_banner {
        height: 36rem
    }

    .pad_top {
        padding-top: 6rem
    }

    .pad_bot {
        padding-bottom: 6rem
    }

    .n_case_xq .bd {
        gap: 6rem
    }

    .pro_bn .pic img {
        max-height: 38rem
    }

    .js_chengguo ul {
        gap: 5.5rem 6rem
    }

    .js_fuwu .bd ul {
        gap: 2rem
    }

    .js_zizhu .center img {
        width: 34rem
    }
}

@media(max-width:1360px) {
    .m {
        padding: 0 8rem
    }
}

@media(max-width:1280px) {
    .m {
        padding: 0 7rem
    }

    .pad_top {
        padding-top: 5rem
    }

    .pad_bot {
        padding-bottom: 5rem
    }

    #logo {
        margin-right: 2.5rem
    }

    .n_about .box1,
    .about_shuzi .m {
        gap: 7rem
    }
}

@media(max-width:1200px) {
    #nav {
        margin-right: 1.5rem
    }

    #header {
        display: none
    }

    #m_header {
        display: block
    }

    #nav_btn_box {
        display: block
    }

    .n_nav {
        display: none
    }

    #m_n_nav {
        display: block
    }

    .web {
        display: none
    }

    .wap {
        display: block
    }

    span.wap {
        display: inline
    }

    .online_q {
        display: none
    }




}