Responsive FAQ with collapsible sections HTML & CSS only

Hey! I made a small change to the layout where I had the accordion container expand as the accordion expanded. To make the accordion expand on click I used an input check box to trigger changes. I have seen other solutions on stack overflow to similar problems use <a> tags too. Would love to hear explanations for why <a> tags may be better for this purpose. If any feedback comes to mind please do not hesitate to write it down as it helps me develop my programming skills :)!