- [ ] I have searched the [issues](https://github.com/vueComponent/ant-design-vue/issues) of this repository and believe that this is not a duplicate. ### Version 2.2.8 ### Environment 2.2.8 ### Reproduction link [https://2x.antdv.com/components/form-cn](https://2x.antdv.com/components/form-cn) ### Steps to reproduce <a-form-item label="Resources"> <a-radio-group v-model:value="formState.resource"> <a-radio value="1">Sponsor</a-radio> <a-radio value="2">Venue</a-radio> </a-radio-group> </a-form-item> ### What is expected? 圆点在圆框的中心位置 ### What is actually happening? 圆点不在圆框的中心位置,偏移部分像素 <!-- generated by issue-helper. DO NOT REMOVE -->