message: [Improvement] Radio: optimize style
diff: @@ -13,8 +13,9 @@ $van-radio-size: 20px;
  }
  &__input {
  + height: 1em;
  position: relative;
  - height: $van-radio-size;
  + font-size: $van-radio-size;
  }
  &__control {
  @@ -40,7 +41,6 @@ $van-radio-size: 20px;
  .van-icon {
  width: 1em;
  pointer-events: none;
  - font-size: $van-radio-size;
  }
  .van-icon-checked {
  