使用cdn方式加载antd5和@ant-design/cssinjs，动态添加的样式异常

以下是我动过dom查询到style标签后打印的内容，发现这里多了一个 & 符号

带来的问题是 一部分样式失效，像这里丢失了.ant-btn-variant-solid的背景色

Start by reproducing the reported CDN setup with antd 5 and @ant-design/cssinjs, then inspect the dynamically generated style tag in the DOM. Compare the generated CSS with the expected selectors, especially the .ant-btn-variant-solid rule. Done means the injected CSS contains no stray '&' and the affected button styles render correctly.

Written by the indexing model from the issue text.