Wordpress "Read More" Tag

Hello,

I'm looking to do another Wordpress Site and love the "read more" feature on this site -https://www.entertainmentone.com/about-eone/

If you scroll down to any of their services and click on a "read more" button, it pulls down an entirely new row of things, new photos and information.

I'm trying to figure out the best way to do that in Wordpress? I know there are the "Read more" sections, but it doesn't normally pop down an entire row like that and keep the design nice...

Wordpress "Read More" Tag

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