Depending on the type of website you handle, you might need a FAQ. Try to take note of all the questions you get asked multiple times regarding your services, and create a FAQ to answer them. This will save you some time in the future hopefully.

This tutorial will help you understand, how to create interactive and dynamic behavioral components on the website. Once you make this component, you can keep on reusing it for any website you will make in future, because most of the websites for any type of services in one way or the other will need a FAQ page.

Of course, you can change the colors, sizing, icons, effects of different elements here as per your design needs by keeping it simple and elegant. But meanwhile, the core interactive functionality of the component shouldn't get disturbed.

Well, that's the task for you to decide. If you can make this component work without using JavaScript then sure, go ahead.