taro/src/custom-tab-bar2/index.wxss

.tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 104px;
  /* background: #000D1FD9; */
  /* backdrop-filter: blur(10px); */
  background: #000;
  display: flex;
  padding-bottom: env(safe-area-inset-bottom);
  border-top-color: rgba(255, 255, 255, 0.2);
  border-top-width: 1px;
  border-top-style: solid;
  z-index: 100;
}

.tab-bar-border {
  background-color: rgba(255, 255, 255, 0.05);
  position: absolute;
  left: 0;
  top: 0;
  width: 750rpx;
  height: 1px;
  /* transform: scaleY(0.5); */
}

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

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

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

.icon {
  width: 128rpx;
  height: 80rpx;
  /* background-color: pink; */
}

.item {
  /* color: rgba($color: #ffffff, $alpha: 0.4); */
  color: rgba(255, 255, 255, 0.4);
  font-size: 36px;
  padding-top: 25px;
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: center;
}

.item-sel {
  color: #ffffff;
  font-size: 40px;
}