dark 模式下，a-affix组件下的 a-radio-group 背景透明了，这显示不是预期到要的

[elkon028]

• I'm sure this does not appear in the issue list of the repository

Basic Info

• Package Name And Version: @arco-design/web-vue@2.56.2
• Framework version: vue3.5.5 vite5.4.5
• Browser: chrome128.0.0.0

What is expected?

dark 模式下 a-radio-group等组件不要透明

Steps to reproduce

<AAffix :offset-top="16" target=".page-layout">
  <ASpace>
    <ARadioGroup v-model="themeType" type="button">
      <ARadio :value="false">亮色</ARadio>
      <ARadio :value="true">暗黑</ARadio>
    </ARadioGroup>
    <ARadioGroup v-model="colorType" type="button">
      <ARadio value="hex">HEX</ARadio>
      <ARadio value="rgb">RGB</ARadio>
      <ARadio value="hsl">HSL</ARadio>
    </ARadioGroup>
  </ASpace>
</AAffix>