[Bug] "Try it out" demo style bug in dark mode

[yutingzhao1991]

What happens?

How To Reproduce

https://web3.ant.design/guide/ant-design-web3 页面用暗黑模式浏览

Context

• Ant Design Web3 Version:
• Node Version:
• Platform:

[github-actions]

Hello @yutingzhao1991. We totally like your proposal/feedback, welcome to send us a Pull Request for it. provide changelog/documentation/test cases if needed and make sure CI passed, we will review it soon. We appreciate your effort in advance and looking forward to your contribution!

你好 @yutingzhao1991，我们完全同意你的提议/反馈，欢迎直接在此仓库 创建一个 Pull Request 来解决这个问题。提供改动所需相应的 changelog、测试用例、文档等，并确保 CI 通过，我们会尽快进行 Review，提前感谢和期待您的贡献。