.nbanner{
            width: 100%;
            height: 390px;
           
            
        }
        .middleNavView{
            width: 750px;
            height: 70px;
            border: 1px solid gainsboro;
            border-radius: 3px;
            margin: 0 auto;
            margin-top: 50px;
            margin-bottom: 50px;
        }
        .middleNav{
            width: 20%;
            -webkit-box-sizing: border-box;
            -moz-box-sizing: border-box;
            box-sizing: border-box;
            height: 20px;
            border-right: 1px solid gainsboro;
            text-align: center;
            margin-top: 25px;
            font-size: 14px;
            float: left;
        }
        .middleNav:last-child{
            border-right: 0px;
        }
        .middleNav.active{
            color: #f78601;
        }
        .middleDes{
            width: 1130px;
            overflow: hidden;
          
            -webkit-box-sizing: border-box;
            -moz-box-sizing: border-box;
            box-sizing: border-box;
            padding-left: 10px;
padding-right: 10px;
            margin: 0 auto;
            font-size: 16px;
            padding-top: 60px;
            padding-bottom: 60px;
            color: #0b0b0b; line-height:28px;
            font-family: "Microsoft YaHei";
        }