@media screen and (orientation: portrait) {
/*竖屏 css*/
}
@media screen and (orientation: landscape) {
/*横屏 css*/
}
@media screen and (min-width:1366px){
/*pc端 css*/

    .main{
        width:900px;
        margin-left:auto;
        margin-right:auto;
    }
    .ch-name{
        /*font-size:28px;*/
        /*font-weight: bold;*/
        /*margin:25px 0px 20px 0px;*/
    }
    .errmsg{
        margin-top:10px;
        color:red;
    }
    .tips{
        margin:10px 0 10px 0;
    }
    #url1{
        width:776px;
        padding:10px;
        font-family: Arial;
        font-size: 18px;
    }
    .btn-pl{
        width:100px;
        height:45px;
        background-color: green;
        color: white;
        font-size: 18px;
    }
    p{
        font-size: 18px;
        line-height: 2em;
    }
    em{
        background-color: yellow;
    }
}