vant-weapp/dist/tabbar-item/index.wxss

.van-tabbar-item{float:left;color:#666;height:100%;display:-webkit-box;display:-webkit-flex;display:flex;line-height:1;font-size:12px;-webkit-box-align:center;-webkit-align-items:center;align-items:center;-webkit-box-orient:vertical;-webkit-box-direction:normal;-webkit-flex-direction:column;flex-direction:column;-webkit-box-pack:center;-webkit-justify-content:center;justify-content:center}.van-tabbar-item__icon{font-size:18px;margin-bottom:5px;position:relative}.van-tabbar-item__icon .van-icon{display:block}.van-tabbar-item__icon--dot::after{top:0;right:-8px;width:8px;height:8px;content:' ';position:absolute;border-radius:100%;background-color:#f44}.van-tabbar-item__icon image{width:50px;height:18px}.van-tabbar-item--active{color:#38f}