Need help applying this CSS to other pages

Hi There! This is the code I received for this page : https://www.lynnmercado.com/makeup-remover-wipes 

/* Social MUR */

@media screen and (max-width:767px) {

div#block-e810db49221525f7bedd+.row>.span-4 {

    width: 33.3333% !important;

    float: left !important;

}

[data-section-id="60ea3184787dde1a90b9260f"] {

    min-height: unset !important;

}

}

But I need to apply it to all the other pages on the site. Please help!!! How do I find the div block? I keep trying all of the block id's in the section and nothing works. 

Hi,

To find data-section-id and block id (#block-yui...) use this free tool: https://chrome.google.com/webstore/detail/squarespace-id-finder/igjamfnifnkmecjidfbdipieoaeghcff?hl=en