Thread:FishTank/@comment-44745594-20200428224853

Hello! Apologies if this is shown twice, my message seems to have been deleted. Anyhow, I would like to create a Portal Item on my main page. Similar examples of what I want are:
 * Jax and Daxter Wiki (Template:Portal/Contents)
 * Backyard Monsters Wiki (Template:Portal/Component/Slider)
 * Riordan Wiki (Template:Slider)

Specifically, I want viewers to click on an image which will then reveal this message: Invitation. I am not looking to create a navigation box that will negatively impact my wiki for SEO, but simply one portal.

I understand that I need to import various codes into my Wikia.css, however when I look at the other wiki's CSS I don't quite understand them. Is there a step-by-step process explanation of what to place onto my Wikia.css and Templates, and what the exact codes exactly mean and do? Thank you very much.

P. S. I have already emailed Fandom Support about this issue, and they have recommended me to discuss in detail with you.

P. P. S. I have also read a full discussion of this topic on Community Central However after I added the necessary code from the responses, my code did not work and was unsuccessful.

P. P. P. S. I have also asked a question on Fandom Developers Wiki, however there have not been any successful responses. 