Make collapsible content full width on desktop
In collapsible content section, add the following in customer css:

@media screen and (min-width: 768px) {
.collapsible-content {
max-width: 120rem;
margin: 0 auto;
padding: 0px 3rem;
}
.collapsible-content-wrapper-narrow {
margin-left: 0px;
}
}
Related Articles
Full width text for image banner on desktop
In custom css, add the following: @media only screen and (min-width: 750px) { .banner--content-align-left.banner--desktop-transparent .banner__box { max-width: 100% !important; } }
Make multirow section full width
In the multi row section, add the following in the custom css: .multirow .multirow__inner { max-width: 100% !important; padding: 0px !important; }
Make Mega Menu Second Child Horizontal
In the header, add in custom css as below: @media screen and (min-width: 990px) { .header--top-center .mega-menu__list { display: flex; justify-content: left; flex-wrap: wrap; column-gap: 0; } #MegaMenu-Content-1 .mega-menu__list li:nth-child(2) ...
Increase Page width
Go to base.css Find "narrow" Replace with "wide" e.g: .page-width--wide { max-width: 72.6rem; padding: 0; }
Increase width of policy pages
Go to Online Store > Theme > Edit code of your current theme Open your theme.liquid theme file Paste the below code before </head> <style> .shopify-policy__container { max-width: 1200px !important; } </style>