Based on the useless scrollbar next to the presentation and next to the demo iframe on the website, I'm guessing this was developed and tested on macOS where scrollbars are invisible. Web designers, please enable scrollbars! Not a great look for someone trying to sell a type of webhosting in my opinion.

I'm not sure about the demo case to be honest. If you're trying to sell a villa that's worth a 1.5m euros, you should probably spend some money and invest in something more professional than the Wix of home sales.