.ld_sp_title{  
    width: 100%;
    font-size: 22px;
    line-height: 30px;
    margin-top: 2px;
    margin-bottom: 2px;
    text-align: center;
    font-family: "microsoft yahei", 微软雅黑;
    font-weight: bold;}
.ld_sp_video{

    width: 90%;
    margin: 0 auto;
    font-size: 14px;
    color: #000000;
    line-height: 29px;
    margin-top: 33px;
    text-align: left;
    margin-bottom: 20px;
}
.ld_sp_video>video{width: 600px;
margin: 0 auto; display: block; height: 400px; background: #000;}
 .mbxNav span a:last-child{display:none;}

._tdp_bigbtn{display:none!important}



@media screen and (max-width:640px) {
   .ld_sp_title{font-size:18px;}
   .ld_sp_video video{width:100%;height:auto;}
 











}