I’m building my portfolio and I added an embed code to my CMS collections. After putting it in the template page and publish it I realized that my whole page content disappeared except for the embed code :
I think your “close tags” are wrong:
not <div/> but </div>, not <style/> but </style>. (slash position)
Try and tell me 
OH THANK YOU !!!
It worked… It has been a while since i didn’t wrote html I did a basic mistake ! tyvery much