Semantic-Org/Semantic-UI ? reverse-engineered prompt

Build me a polished front end UI framework website for Semantic UI, with a clean homepage that shows off the core components and how easy they are to use. I want a strong landing page with a hero section, feature highlights, examples of common components like buttons, dropdowns, sidebars, popups, tooltips, and grids, plus a simple navigation that helps people find docs and getting started info fast.

Make it feel modern, responsive, and themeable, since the project is all about flexible styling and natural language class names. Include a setup and install section, a theming section, and a small showcase of the UI in action. Keep the design production ready and easy to scan, with concise copy and clear visual hierarchy.

If you need to check current docs or best practices, look them up online. Please also make sure the page works well on mobile and looks good on desktop, with a cohesive Semantic UI style throughout.