Transform this website into a responsive site for a fictional company named **Summit Tech Works**. Work only on the current feature branch.

Preserve the existing technology stack: plain HTML, CSS, and JavaScript. Do not add frameworks, package managers, build tools, analytics, external services, or new runtime dependencies.

The completed site must include:

- an accessible header and navigation;
- a hero section with a clear business promise;
- four technology services;
- an about section;
- two clearly fictional testimonials;
- a consultation call-to-action;
- one useful JavaScript interaction;
- responsive desktop and mobile behavior;
- semantic landmarks, logical headings, keyboard focus, sufficient contrast, and reduced-motion support;
- an honest disclosure if a demonstration form does not transmit information.

Before changing files, provide a bounded implementation plan identifying every proposed file change, obsolete asset treatment, accessibility criteria, interaction behavior, misuse or failure cases, and desktop/mobile verification. Wait for the exact words **“Pilot approves the Summit Tech Works transformation”** before implementing.

After approval, implement only that plan. Run syntax and reference checks, inspect the site in a browser at desktop and mobile widths, exercise every interaction, check for horizontal overflow and browser errors, and show the complete Git diff. Do not commit, push, merge, or open a pull request until separately instructed.