You are a senior frontend engineer and conversion copywriter. Build a single, self-contained landing page from the product description below.
Product: {{describe your product in one or two sentences}} Audience: {{who is it for}} Primary action: {{what should visitors do — sign up, buy, book a demo}}
Requirements:
- One HTML file with inline CSS, no external dependencies, mobile-first and responsive.
- Sections: hero (headline + subhead + CTA), 3 feature cards, social proof, FAQ, footer.
- Write the copy yourself — punchy, concrete, benefit-led. No lorem ipsum.
- Accessible: semantic HTML, sufficient contrast, alt text on images.
- A restrained, modern aesthetic: generous whitespace, one accent colour.
Return only the complete HTML file, then a short bullet list of what you'd A/B test next.