如何让radio组件的子元素宽度撑满父布局？

   <radio class="radio" wx:for-items="{{itemlist}}" wx:for-item="item" wx:key="itemId" checked="{{item.checked}}">
      <!-- radio的子元素宽度无法撑满 -->
      <view class="item">
        <view class="item-mid">
          <text class="item-service-title">{{item.itemName}}</text>
          <text class="item-service-time">服务时间：{{item.serviceTime}}min</text>
        </view>
        <text class="item-service-price">¥900</text>
      </view>
    </radio>
  </radio-group>