app/dist/tab/index.wxss

.i-tabs-tab {
  flex: 1;
  display: flex;
  width: 100%;
  -webkit-box-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  align-items: center;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  flex-direction: column;
  text-align: center;
  position: relative;
  z-index:2
}

.i-tabs-tab-bar {
  display: block;
  width: 100%;
  height: 8rpx;
  border-radius: 8rpx;
  background: 0 0;
  position: absolute;
  bottom: 15rpx;
  left: 0;
  z-index: -1;
  background: #9DDB52!important;
}

.i-tabs-tab-title {
  box-sizing: border-box;
  font-size: 30rpx;
  font-family: PingFang SC, PingFang SC-Medium;
  font-weight: 500;
  text-align: center;
  color: #666666;
  letter-spacing: -1rpx;
}

.i-tabs-tab-title-current {
  font-size: 32rpx;
  font-weight: 700;
  color: #1A1A1A;
}

.i-tabs-tab-scroll {
  display: inline-block;
  width: 60px
}