Custom CSS in page template

Im trying to make home page that was created by sp-page builder to be fluid (full width) and other pages to remain default.

Code was applied in Custom CSS in page template
backend page link: https://thebullyplanet.com/administrator/index.php?option=com_templates&;view=style&layout=edit&id=31

Code: body.com-sppagebuilder .office-container__content-menu {
display: none !important;
}

Every-time I do a upgrade in office template the code done work anymore.

Note: When I inquired about making another page fluid (full width)
I was told they noticed this page: https://www.thebullyplanet.com/bullyfind , do not have `com-sppagebuilder` attached on body class. This is why, the css code above doesn't work.

Would this be a solution I could use for home page, if yes could you make change and show me how to do it please?

link: https://www.thebullyplanet.com/