Hello,

Each page template has a HEADER section where you can place your style sheet definition, but this style sheet will be applied for all of the pages which uses this page template. You can also apply style sheet per document (CMS Desk -> Content -> choose your page -> Properties -> General section -> CSS stylesheet). The third option is to use the “Head HTML” web part on a page template where you can specify which code should be inserted into HEAD section of your rendered page.

Best regards,
Boris Pocatko