I think these screenshot sections demonstrate:
Top level /categories, with description text with hyperlinks from About the Community category topic, plus bulleted subcategories.
Drill-down /c/community category with subcategory description text with hyperlinks, in boxes, from subcategory About topics (boxes from the Category setting ‘Show subcategory list above topics in this category’: Boxes).
About the Community category topic is listed with bulleted Community category name, but without excerpt text.
Drill-down /c/community/cocktails subcategory with excerpt text from About the Cocktails category topic, but no hyperlinks.
Sister /c/community/react subcategory without excerpt text from About the Reactions category (which contains the text seen in the box at /c/community).
