karthikeyanoss/d3dgears-pro-loader ? reverse-engineered prompt

Build me a polished one page download site for D3DGear 5.00.2320 that looks like a modern product landing page and feels easy to use on desktop and mobile.

I want a big hero section with a clear download button, a short explanation of what the app does, and a simple install section that tells people how to get started. Add feature highlights for recording, streaming, benchmarking, GPU overlay info, and profile based setup. Include a compatibility section for Windows, macOS, Linux, and Steam Deck, plus a small example of a custom profile and a command line example for advanced users.

Make it clean, responsive, and visually impressive, with smooth scrolling, nice cards, and a professional tech style. Keep everything in a single static page if possible, and make sure the download links stand out clearly. If you need to, look up any current browser friendly design best practices online before finishing.