body,ul,pa,a{
        margin:0; padding:0;color:#fff;text-decoration:none
    }
    ul{
        list-style-type:none;
    }
    html,body{
        height:100%;
    }
    #wrap{
        position:relative;
        width:100%;
        min-width:1200px;
        height:100%;
        overflow:hidden;
    }
    .main-body{
        position:absolute;
        top: 0;
        width:100%;
        height:100%;
    }
    .main-header{
        width:100%;
        height:100px;
    }
    .logo{
        float:left;
        width:300px;
        text-align:center;
        line-height:100px;
        margin-top:20px;
		margin-left:55px;
    }
    .nav{
        float:right;
        width:460px;
        height:100px;
    }
    .item{
        float:left;
        line-height:100px;
        color:#fff;
        margin-left:30px;
        cursor:pointer;
    }
    .main-content{
        position:relative;
        width:100%;
        height:65%;
    }
    .line{
        position:absolute;
        right:150px;
        bottom:140px;
    }
    .main-footer{
        margin-top:100px;
        width:100%;
        height:300px;
        text-align:center;
        font-size:14px;
        color:#fff;
    }
	.banquan {
    text-align: center;
    font-size: 12px;
    color: #fff;
    }
    .video_cover {
      position: absolute;
      width: 100%; height: 100%;
      background: url('video_cover.jpeg') no-repeat;
      background-size: cover;
      background-position: center;
    }