#main-banner{
    .banner{
        width: 375px;
        height: 183px;
        background: url("https://julyedu-cdn.oss-cn-beijing.aliyuncs.com/active19_1111/m/banner.png") no-repeat;
        background-size: contain;
    }
    #main-nav{
        margin-bottom:30px;
        ul{
            background: #3900C9;
            display: flex;
        }
        li{
            width: 63px;
            height: 30px;
            font-size: 11px;
            color: #fff;
            text-align: center;
            line-height: 30px;
        }
    }
}
