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请问大佬，我标题h1没有像h2,h3一样，没有背景框，请问怎么解决？谢谢您的帮助！( https://www.cnblogs.com/SeanOcean/p/11262387.html这篇随笔的思维导图底下有个h1形式的标题1)
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h2,h3加了样式，h1没有