Responsive Tabs allows you to add footer accordions at the bottom of the front page, other pages, posts or archives listings. Just go to the customizer and drop in page ID numbers in the appropriate blanks under Footer Accordions. The titles of the pages will show on the accordion.
You don’t want to put a lot of information in the accordion — it adds to page weight and it also isn’t the first place a user will glance. Use it for things that the user might actively look for. On the front page, perhaps some routine information about your office. Or, for archive pages, an explanation of your category system. Just use short pages.