gdy_app_8/src/view/course/utils/navBar.scss

/deep/ .van-nav-bar{
    background-color:#FFF;
    border-bottom: 1px solid #efefef;
}
/deep/ .van-nav-bar .van-icon{
    color:#333;
}
/deep/ .van-nav-bar__text{
    color: #333;
}
/deep/ .van-nav-bar__title{
    color: #333;
}
/deep/ .van-nav-bar__left span{
    color: #333!important;
}