Responsive and Accessible Accordion Card using HTML, SASS and JS

I am happy I have been able to get this far. I struggled a lot with the background positioning of the patterns and then with the illustration woman and box. I decided to show what I have now and ask for help on how to properly do this.

My issue with the illustration for the mobile was having it stick to the top of the container even with different screen sizes. I used percentages in the absolute positioning for this but it did not seem to work past around 300px screen sizes and below.

The illustration box also does not stay in one place. I tried using position: fixed and it did not work as I wanted it to. I'll appreciate help on my positions for the different screen sizes. Also, feedback on accessibility is welcome.