wxmp-wodeshebao/custom-tab-bar/index.wxss

.tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 48px;
  background: white;
  display: flex;
  width: 750rpx;
  z-index: 10000;
  padding-bottom: env(safe-area-inset-bottom);
}

/* .tab-bar-border {
  background-color: rgba(0, 0, 0, 0.33);
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 1px;
  transform: scaleY(0.5);
} */

.tab-bar-item {
  /* flex: 1; */
  width: 250rpx;
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.tab-bar-item image {
  width: 27px;
  height: 27px;
}

.tab-bar-item view {
  font-size: 10px;
}

.red-dot {
  width: 250rpx;
  height: 48px;
  margin-left: -250rpx;
  display: flex;
}

.red-dot>view {
  flex-direction: row;
}

.red-dot>view>view {
  min-width: 32rpx;
  height: 32rpx; 
  border: 4rpx solid white;
  border-radius: 20rpx;
  background-color: #FF5E5E;
  margin: 8rpx auto 0 133rpx; 
  display: flex;
}

.red-dot>view>view>text {
  text-align: center;
  font-size: 22rpx;
  color: white;
  line-height: 32rpx;
  margin: 0 10rpx; 
}