@media screen and (max-width: 1200px) {
    body {
        max-width: 600px;
        margin: auto;
    }

    .m-nav {
        display: block;
        position: fixed;
        top: 0;
        z-index: 999;
        background-color: #fff;
        width: 100%;
        max-width: 600px;
        margin: auto;
    }

    .m-menu {
        padding: 10px 20px;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .m-menu button .ti-menu-2 {
        font-size: 24px;
    }

    .m-items {
        position: relative;
    }

    .m-item {
        position: absolute;
        top: 44px;
        right: -20px;
        background-color: #fff;
        width: 180px;
        font-size: 20px;
        text-align: center;
        height: 300px;
        padding: 20px 10px;
        z-index: -10;
        display: none;
    }

    .m-item a {
        width: 100%;
        display: inline-block;
        padding: 10px 0;
        color: #ff4521;
    }

    .m-item ul > li {
        border-bottom: 1px solid #c4c4c4;
    }


    /* m-nav-----end */
    .gd-constr,
    .gd-ys-box,
    .gd-bot-box,
    .offer-left {
        max-width: 100%;
        box-sizing: border-box;
    }

    .gd-ys-box {
        text-align: center;
    }

    #ab {
        margin-top: 57px;
    }

    .headtop,
    #gdBarX {
        display: none;
    }

    .gd-img-slidenav30 {
        position: relative;
        width: 60%;
        left: 0;
    }

    .gd-bot-box .true-btn {
        width: 60%;
    }

    .gd-bot-box.r {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        align-items: center;
    }

    .banner-text h1 {
        font-size: 30px;
    }

    .true-btn {
        order: 2;
    }

    .demo-btn {
        order: 1;
        margin-bottom: 20px;
    }

    .banner-text h3 {
        font-size: 20px;
    }

    .banner-text a {
        font-size: 16px;
    }

    .banner-text {
        width: 75%;
        margin-top: 10%;
    }

    .offer-iframe {
        height: auto;
    }

    table.desktop td {
        font-size: 16px;
    }

    table.desktop td:last-child {
        display: none;
    }

    table.desktop tr th:nth-child(2),
    table.desktop tr td:nth-child(2) {
        display: none;
    }

    table.desktop tr th:last-child {
        display: none;
    }

    table.desktop td {
        padding: 25px 5px;
    }

    .gd-home-p,
    .more-expert {
        text-align: center;
    }

    .vedio-live,
    .vedio-con {
        width: 100%;
        max-width: 100%;
    }

    .item_content {
        bottom: 0;
        opacity: 1 !important;
    }

    .item_box {
        background: #fff;
        box-shadow: 0 5px 18px rgb(0 0 0 / 10%);
    }

    .downloadBox-l {
        width: 100% !important;
        margin-right: 0 !important;
    }

    #downlaodSwiper .downImg {
        display: none;
    }

    .gd-logo, .l,
    .r {
        float: unset;
    }

    .newsNav,
    .firstnew,
    .newlist,
    .newlist a {
        width: 100% !important;
        box-sizing: border-box;
    }

    .firstnew .details {
        opacity: 1;
        bottom: 20px;
    }

    .pa {
        position: unset !important;
    }

    .newlist li h3 {
        height: auto;
    }

    .newsp {
        width: 100%;
    }

    .firstnew {
        height: auto;
    }

    .newlist li .newmore {
        opacity: 1;
    }

    .content,
    .footer {
        max-width: 100%;
        height: auto !important;
    }

    .footer-center {
        flex-wrap: wrap;
        margin-top: 20px !important;
        padding-bottom: 20px !important;
    }

    .content {
        padding-bottom: 20px;
    }

    .footer-bottom {
        padding: 0 10px;
    }

    .firstnew .item_img {
        max-width: 100%;
    }

    .download-container {
        text-align: center;
        height: auto !important;
    }

    .swiper-wrapper {
        max-width: 100% !important;
        transform: none !important;
        height: auto !important;
    }

    .swiper-slide {
        width: 100% !important;
        float: unset !important;
    }

    .item_box img {
        width: 100%;
        margin-top: 0 !important;
    }

    .item_box {
        height: auto !important;
    }

    .team-teacher {
        height: auto !important;
    }

    .team-teacher li {
        width: 80%;
    }

    #downlaodSwiper .swiper-wrapper .swiper-slide:first-child {
        height: auto !important;
    }

    .appBox .line img {
        width: auto !important;
        height: auto !important;
    }

    .downloadBox-l p.mt36,
    .downloadBox-l p {
        padding: 0 10px;
    }

    .downloadUl,
    .downloadUl-hover {
        width: 100% !important;
    }

    .downloadImg {
        display: none;
    }

    #downlaodSwiper .swiper-wrapper .swiper-slide:last-child {
        height: auto !important;
    }

    .download-container {
        margin-bottom: 30px;
    }

    .vedio-con p {
        padding: 0 10px;
    }

    /* cate ----start */
    .page-cate {
        margin-top: 56px;
    }

    .page-cate h1 {
        margin-top: 0;
        padding-left: 20px;
    }

    .page-items {
        flex-wrap: wrap;
        justify-content: center;
    }

    .c-items {
        width: 90%;
    }

    .c-img {
        text-align: center;
    }

    .c-img img {
        height: auto;
        width: auto;
        max-width: 100%;
    }

    .page-cate .pagination {
        flex-wrap: wrap;
    }

    /* cate----end */
    /* article----start */
    .body-w {
        margin-top: 60px;
        max-width: 100%;
    }

    .page-article {
        flex-wrap: wrap;
    }

    .page-a-text {
        width: 100%;
    }

    .page-a-right {
        width: 100%;
        margin-top: 20px;
    }

    .page-a-des table {
        max-width: 100% !important;
        width: 100% !important;
    }

    .up-down {
        flex-wrap: wrap;
    }

    .up-down div {
        width: 100%;
        margin-bottom: 10px;
    }

    .m-none {
        display: none;
    }

    .p-none {
        display: block;
    }

    #hdSlide1 .gd-constr {
        flex-wrap: wrap;
    }

    #hdSlide1 .gd-constr .left {
        width: 100%;
        text-align: center;
    }

    #hdSlide1 .gd-constr .right {
        width: 100%;
    }

}