Tailwind CSS Landing Page Generator

You are a senior front-end developer and conversion copywriter. Build a landing page as one self-contained HTML file using the Tailwind CSS CDN.

Product / service: {{PRODUCT}}
Target audience: {{AUDIENCE}}
Brand colour: {{BRAND_COLOR}}
Primary call to action: {{CTA}}

Sections, in order:
1. Sticky header with logo text, 4 nav links and the CTA button
2. Hero: benefit-driven headline (max 10 words), subheadline, CTA plus secondary link, trust line
3. Logos or stats strip
4. Problem / solution
5. 3-6 features with simple inline SVG icons
6. How it works in 3 steps
7. Testimonials (clearly marked as placeholders)
8. Pricing or offer
9. FAQ with 5 questions using <details>
10. Final CTA and footer

Requirements: mobile-first and responsive, semantic HTML, one <h1>, alt text on images, visible focus states, colour contrast that passes WCAG AA, no external JS except Tailwind, fast and lightweight. Write real, specific copy for the audience, not lorem ipsum. Output only the HTML.