How to adjust content wrapper on a specific image without altering entire page?

On the mission of building my website and want to add a standard "claims banner" element to different pages.

I know very basic CSS and cannot figure out how to adjust the content wrapper on this specific element so the banner spans across 100% of my page's width (no padding, no margin).  How can I fix this?

Ideally, I would like to create a custom code that would apply every time I upload this same banner file (which is a .png) in different pages of my site. Is this possible?

Hope someone can help 🙂

Julia

https://jellyfish-cow-prac.squarespace.com/
testjellyfish

Hi. Add to Design > Custom CSS

/* fullwidth section */
[data-section-id="603f9d19e89933795e5ec7e6"] .content-wrapper {
    padding-left: 0 !important;
    padding-right: 0 !important;
	max-width: 100% !important;
}
html, body {
	overflow-x: hidden;
}