SkytherGG/3D-web-maker ? reverse-engineered prompt

Build me a scroll based 3D landing page that feels like you are flying through one connected little world as you move down the page.

I want it to work for a real brand, with a clear intro, a few themed scenes that flow into each other, and a strong call to action at the end. Make it feel smooth and cinematic, with no obvious cuts, and let the page autoplay as well as respond to manual scrolling. If it helps, look up the current docs online for anything you need.

Please make it easy to swap in a different brand later, with a place to set the visual style, colors, scene order, and text. The default version can be a polished demo world if no brand is provided yet, but it should feel ready to customize for a startup, product, or creative agency. Also make sure it works in a modern browser and is simple to run locally for review.