message: [Improvement] Tab: update card style
diff: @@ -56,12 +56,12 @@ $van-tabs-card-height: 30px;
  margin: 0 15px;
  border-radius: 2px;
  box-sizing: border-box;
  + border: 1px solid $red;
  height: $van-tabs-card-height;
  - border: 1px solid $gray-darker;
  .van-tab {
  - color: $gray-darker;
  - border-right: 1px solid $gray-darker;
  + color: $red;
  + border-right: 1px solid $red;
  line-height: calc($van-tabs-card-height - 2px);
  &:last-child {
  @@ -70,7 +70,7 @@ $van-tabs-card-height: 30px;
  &.van-tab--active {
  color: $white;
  - background-color: $gray-darker;
  + background-color: $red;
  }
  }
  }
  