Yes, building a backlink to the specific category page (e.g., /shoe/Nike-men-running-shoe) can also indirectly benefit the broader category page (e.g., /shoe). When a specific page receives backlinks and gains authority, search engines often pass on some of that authority to related pages, especially if they are within the same category. However, the primary focus of the backlink will be on the page it targets. To directly strengthen the broader category page, it's best to build backlinks specifically to it as well.