index.wxss

.tabBar {
  position: fixed;
  width: 100%;
  left: 0;
  bottom: 0;
  height: 120rpx;
  box-sizing: border-box;
  padding: 0 10rpx;
  opacity: 1;
  background: transparent;
  display: flex;
  justify-content: stretch;
  flex-wrap: nowrap;
  transition: all 200ms linear;
}

.tabBar.checkpoint {
  opacity: 0.8;
}

.tabBarItem {
  position: relative;
  flex-grow: 1;
  min-width: 25%;
  background-color: #5050CF;
  text-align: center;
  margin: 0 10rpx 10px;
  border-radius: calc(6px + 2rpx);
  transition: all 200ms;
  transition-timing-function: cubic-bezier(0, 0.4, 1, 1);
}

.tabBarItem.selected {
  flex-grow: 5;
  background-color: #E0E0EE;
  transition-timing-function: cubic-bezier(0, 0, 1, 0.6);
}

.dark .tabBarItem.selected, .checkpoint.dark .tabBarItem{
  background-color: #404048;
}
.dark .tabBarItem{
  box-shadow: 0 6rpx 18rpx 15rpx rgba(15, 15, 15, 0.2) ;
}

.checkpoint .tabBarItem{
  background-color: #E0E0EE;
}

.tabIcon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 54rpx;
  height: 54rpx;
  margin: 1px 5rpx 0 0;
  opacity: 1;
  background-size: cover;
  transition: all 200ms;
  transition-timing-function: cubic-bezier(0, 0.45, 1, 1);
}

.checkpoint .tabIcon, .selected .tabIcon {
  opacity: 0;
  transition-timing-function: cubic-bezier(0, 0, 1, 0.55);
}


.tabText {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 35rpx;
  font-weight: bold;
  white-space: nowrap;
  opacity: 1;
  color: #505058;
  transition: all 200ms;
  transition-timing-function: cubic-bezier(0, 0, 1, 0.6);
}

.dark .tabText{
  color: #E0E0EF;
}

.unselected .tabText {
  opacity: 0;
  transition-timing-function: cubic-bezier(0, 0.4, 1, 1);
}

.tabBarBg{
  position: absolute;
  z-index: -1;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(255,255,255,1) 40%, rgba(255,255,255,0));
}

.dark .tabBarBg{
  background: linear-gradient(to top, rgba(31,31,31,1) 40%, rgba(31,31,31,0));
}