FAQ accordion - dosent look bad but a lot of doubts in implementation

Not newbie for me. Js is almost a hard copy of something I found on the internet, haven't started learning it yet. I would love for someone to tell me if Its a good way to sue position absolute for the card on top of image, it all seemed to fail for me, dosent feel right. And also Whats the right way to expand image to the max width of the page. BTW, I dont know why last question appears blue in github page. In localhost it is good for me.