.shai{display: none}
#black_bg{display: none}
@media screen and (max-width: 740px) {
     .uls{display: none}


    .dh_btn{
          width: 60px;
          height: 60px;
          background: #f00;
          float: left;
          cursor: pointer;
          line-height: 60px;
          text-align: center;
     }

 .user_admin_btn{
          width: calc(100% - 60px);
          height: 60px;
          background: pink;
          float: right;
     }

     #left_dh{

          height: 100%;
          background: #FFFFFF;
          display: block;
          right: 0;
          position: absolute;
     }

     #black_bg{
          width: 100%;
          height: 100%;
          position: fixed;
          top: 0px;
          background: rgba(0,0,0,0.5);
          z-index: 299;
          display: none;
     }
     .mobile_uls{padding: 2% ;z-index: 9999;display: none;min-width: 200px}

     .requer{
         text-align: center;
         position: fixed;
         bottom: 20px;
         width: 70%;}
     .shai{display: inline-block}
    #page { width: 940px; height: 400px; padding: 20px; margin: 0 auto; background: white; }

    .panel {
        display: none;
        width: 220px;
        padding: 20px;
        background-color: #333;
        color: #fff;
        box-shadow: inset 0 0 5px 5px #222;
    }
    .xuanze{background-color: white;width: 0% ;height:0%;position: fixed;
        animation-delay: 5s; animation-name: fadeInRight;
        top: 20%;
        right: 0;
        color: #333;
        z-index: 999;
    }
    .zuob{position: fixed;left: 0px;background-color: rgba(0,0,0,.3);width:100%;display: none;z-index: 1;height: 100%;top: 0px}
    .mobile_foor{text-align: center;width: 0%;position: fixed;bottom: 0px;z-index: 9999}
    .goback {display: inline-block;padding:5% 0%;width: 50%;text-align: center;background-color: gold;float: left}
    .reback {display: inline-block;padding:5% 0%;width: 50%;text-align: center;background-color: orange;float: right}
}
.shaixuan{cursor: pointer}
@media screen and (min-width: 740px) {
    .xuanze{display: none}
}