How to remove white margin on one page of the index page ?

Site URL: https://indigo-bluebird-lpms.squarespace.com/

Hello, 
I have been struggling for three days on a problem that I am sure is so simple, that it's so frustrating. 

Could someone enlighten me on this problem? 

I want to make make my summary block and my image buttons have an overflow: visible . 

#block-yui_3_17_2_1_1599925188392_12878{.sqs-block-content {overflow-x: visible}} <------- I tried this to remove the margin from the specific image 

#nos-produits .index-page {overflow:visible !important}

#block-yui_3_17_2_1_1599925188392_12878{.sqs-block-content {overflow-x: visible}}

#block-yui_3_17_2_1_1599925188392_12878 {.element.style{overflow:visible}}

. <------ I tried this as a desperate attempt to remove the margin of the whole page 

I did a couple of courses online to understand how to select the right selector however I feel like im turning in circles now and i need help. 

If someone could help me out that would be fantastic . 

Vanille