仅限链接的类别？

[Falco]

How can I customise CSS for each category? (as in having different design for each category)

When you’re in a category, discourse adds the category slug to the body element. For example, on meta here when I visit the bug category I get category-bug in the body tag. If you use that as a selector you can style each category differently.

但由于用户可以在浏览一个分类的同时发布到另一个分类，因此无法按您的预期实现。