Cannot show images over full width

[jw]

Hello,
I am trying to end some of my pages with an image strip that covers the full width of the window. However, the image will only cover the max content width defined in the Lay Options, revealing the peachy-orange background on each side. How can I cover this area too? Ideally, I'd like to just use CSS classes that I can assign in the project editor. It should work for both desktop & mobile.

.bildstreifen{
    max-height: 100px !important;
    max-width: 100% !important;
    object-fit: cover !important;
}

This code is what I have been using so far.

For reference: http://gesundheitspraxis-engel.de/methoden (this page might not always be publicly accessible.

Best
Julius