Landing Page Hosting - Same as website?

I created a new site with Webflow CMS Hosting. Now I want to design a CTA landing page. I don’t understand Hosting for this. Can I use the same hosting as my Website? Do I need a subdomain? Do I just design a single page within my website, and give it an unique url? Must be simple, but I can find any answers. Thank you!

Here is my site Read-Only: LINK
(how to share your site Read-Only link)