How to position an image at the bottom of a section

Site URL: https://kangaroo-nectarine-wrhx.squarespace.com/

Hi there. I am wanting to position an image at the bottom of a section using the following custom CSS I found on a similar topic on this forum. It works in mobile view but not in a standard web view. Could someone please take a look and let me know what I am doing wrong? The password to the staging site is forumpassword

[data-section-id="633fec97c91d2a0f274b9877"] .content-wrapper {
    padding-bottom: 0px !important;
}
div#block-yui_3_17_2_1_1665398838189_326902 {
    padding-bottom: 0;
}

Given that you're using the Fluid Engine editor, you should be able to do this without coding. What image on your website are trying to apply this to? I couldn't see an image/section with corresponding IDs to the code you posted.