@media screen and (max-width: 751px) and (orientation: landscape) {
    .video_tc .video_xiangqing {
        height: calc(100vw * 505 / 1920);
    }

    .wenzi_jieshao .title div {
        font-size: 14px;
    }

    .index_ye {
        overflow: hidden !important;
    }

    .tanchuang_logo>img {
        width: 23vw;
    }

    .wenzi_jieshao .text .red_name {
        font-size: 18px;
    }

    .big_tu_div {
        width: calc(100vw * 1200 / 1920);
        margin-top: calc(100vw * 63 / 1920);
    }
    .nav_pc ul {
        margin-top: 0;
    }
    .nav_pc {
        margin-top: calc(100vw * 48 / 1920);
    }
    .nav_pc ul li {
        margin-right: calc(100vw * 60 / 1920);
        /* margin-right: 5.21%; */
    }
    .logo {
        margin-top: calc(100vw * 31 / 1920);
    }
    .head {
        width: calc(100vw * 1920 / 1920);
        padding: 0 calc(100vw * 100 / 1920);
        height: calc(100vw * 123 / 1920);
    }

    
    
    .logo {
        width: calc(100vw * 272 / 1920);
        height: calc(100vw * 62 / 1920);
    }
    .nav_pc ul li a {
        font-size: calc(100vw * 18 / 1920);
    }
    .liner_xian {
        width: 100%;
        height: calc(100vw * 6 / 1920);
    }
    .big_tu_div .swiper-container {
        width: calc(100vw * 1200 / 1920);
        height: calc(100vw * 400 / 1920);
    }
    .big_tu {
        width: calc(100vw * 1200 / 1920);
        
    }
    #zhaopian {
        margin-right: calc(100vw * 77 / 1920);
        cursor: pointer;
    }
    .nav_jingcai {
        width: 100%;
        margin: calc(100vw * 47 / 1920) 0 calc(100vw * 45 / 1920) 0;
    }
    .nav_jingcai ul li {
        width: calc(100vw * 95 / 1920);
        text-align: center;
        font-size: calc(100vw * 24 / 1920);
        padding-bottom: calc(100vw * 7 / 1920);
        border-bottom-width: calc(100vw * 5 / 1920);
    }
    .video_item {
        margin-right: calc(100vw * 44/ 1920);
        margin-bottom: calc(100vw * 20 / 1920);
        cursor: pointer;
    }
    .video_item {
        position: relative;
        width: calc(100vw * 324/ 1920);
        height: calc(100vw * 183 / 1920);
    }
    
    .video_item .play img {
        width: calc(100vw * 60 / 1920);
    }
    .zhaopian_list_div,.zhaopian {
        width: calc(100vw * 1200 / 1920);
    }
    .zhaopian span {
        font-size: calc(100vw * 20 / 1920);
        padding: 0px calc(100vw * 6 / 1920);
    }
    .title_bg {
        padding:  calc(100vw * 5 / 1920)  calc(100vw * 5 / 1920);
    }
    .zhaopian .zhaopian_list {
        margin: calc(100vw * 20 / 1920) calc(100vw * 65 / 1920) calc(100vw * 30 / 1920) calc(100vw * 65 / 1920);
    }
    .img_sin {
        width: calc(100vw * 200 / 1920);
        height: calc(100vw * 133 / 1920);
        margin-right: calc(100vw * 10 / 1920);
        margin-bottom: calc(100vw * 10 / 1920);
    }
    .img_sin_video img {
        width: calc(100vw * 42 / 1920);
        height: calc(100vw * 42 / 1920);
    }
    .video_tc .video_xiangqing {
        width: calc(100vw * 900 / 1920);
        height: calc(100vw * 506.25 / 1920);
        /* background-color: black; */
    }
    .video_logo {
        width: calc(100vw * 262 / 1920);
    }
    .video_logo_img .video_quxiao {
        width: calc(100vw * 48 / 1920);
        height: calc(100vw * 48 / 1920);
        cursor: pointer;
    }
    .video_logo_img {
        width: calc(100vw * 900 / 1920);
        margin-bottom: calc(100vw * 20 / 1920);
    }
    .logo_img {
        width: calc(100vw * 900 / 1920);
        margin-bottom: calc(100vw * 20 / 1920);
    }
    .img_logo {
        width: calc(100vw * 262 / 1920);
        height: calc(100vw * 62 / 1920);
        object-fit: contain;
    }
    .img_quxiao {
        width: calc(100vw * 48 / 1920);
        height: calc(100vw * 48 / 1920);
        flex: none;
        cursor: pointer;
    }
    .img_xiangqing {
        width: calc(100vw * 900 / 1920);
        height: calc(100vw * 506.25 / 1920);
        /* background-color: black; */
    }
    .nav_jingcai ul li.active {
        border-bottom-width: calc(100vw * 5 / 1920);
    }


    /* 邀请函 */
    .m-taida .content {
        width: calc(100vw * 1000 / 1200);
    }
    .m-taida .content .taida_neirong {
        padding-bottom: calc(100vw * 75 / 1200);
    }
    .taida_neirong .logo {
        padding-top: calc(100vw * 34 / 1200);
    }
    .taida_neirong .biaoti {
        margin-top: calc(100vw * 40 / 1200);
    }
    .phone .logo_img{
        width: calc(100vw * 269 / 1200);
    }
    .biaoti_img{
        width:calc(100vw * 575 / 1200);
    }
    .taida_neirong .zhanwei p {
        text-align: justify;
        text-justify: inter-ideograph;
        /*IE*/
        line-height: calc(100vw * 22 / 1200);
        margin-top: calc(100vw * 25 / 1200);
        font-size: 14px;
    }
    .Content{
        margin-top: calc(100vw * 30 / 1200);
    }
    
    .taida_neirong .center {
        font-size: 16px;
        line-height: calc(100vw * 26 / 1200);
        margin: calc(100vw * 32 / 1200) 0 calc(100vw * 75 / 1200) 0;
    }
    .taida_neirong .kuai .Content .wenzi .xiaobiaoti p {
        line-height: calc(100vw * 22 / 1200);
        margin-bottom: calc(100vw * 30 / 1200);
    }
    .taida_neirong .zhanhuixiangqing .zhanhui_cont p {
        line-height: calc(100vw * 22 / 1200);
    }
    .taida_neirong .about>p {
        line-height: calc(100vw * 22 / 1200);
        margin: 1em 0;
    }
    .zhanshiquyu .wenzi {
        margin-right: 3em;
        font-size: calc(100vw * 14 / 1200);
    
    }
    .tu_1, .tu_2 {
        width: calc(100vw * 380 / 1200);
    }
    .xiao_title p {
        padding: calc(100vw * 5 / 1200) calc(100vw * 10 / 1200);
        font-weight: bold;
        font-size: calc(100vw * 18 / 1200);
    }
    .zhanshiquyu {
        margin-top: calc(100vw * 33 / 1200);
    }
    .biaoti p {
        font-size: calc(100vw * 40 / 1200);
    }
    
    /* .xiao_title p {
        padding: calc(100vw * 4 / 1920) calc(100vw * 10 / 1920);
        font-weight: bold;
        font-size: 14px;
    } */
    .xian {
        width: calc(100vw * 1000 / 1200);
    }
    .taida_neirong .logo{
        padding-top: calc(100vw * 34 / 1200);
    }
    
    
    

    .scroll {
        max-height: calc(100% - 2.5em);
        padding-right: 20px;
    }.img_tc_youjian, .video_you{
        width: calc(100vw * 80 / 1920);
    }
    .img_tc_zuojian, .video_zuo{
        width: calc(100vw * 80 / 1920);
    }
    .wonderful_you_jiantou img{
        width: calc(100vw * 40 / 1920);
        margin-left: 0;
    }
    .wonderful_zuo_jiantou img{
        width: calc(100vw * 40 / 1920);
        
    }
    .detail img{
        height: auto;
    }
}