dinhthenhan/dtn ? reverse-engineered prompt

Build me a simple polished website in one page.

I want a clean homepage that looks good on desktop and mobile, with a strong hero section, a short intro, a few content sections, and a footer. Make it feel modern and easy to read, with good spacing, nice typography, and a consistent color theme. If there is any placeholder content, keep it easy to edit later.

Please keep it lightweight and straightforward, since this looks like a plain HTML site. Make sure the page works well in a browser right away, and add any small touches that make it feel finished, like smooth scrolling, clear section layout, and good responsive behavior. If you need to look up current best practices or small helper details online, go ahead.