Builds high-converting single-page landing pages for digital products, services, local businesses, lead magnets, and offer pages. Outputs production-ready HTML/CSS/JS using a proven anatomy (hero, social proof, how-it-works, features, benefits, reviews, FAQ, repeated CTA). Use this skill when the user asks for a landing page, sales page, offer page, product page, opt-in page, or "one-pager" - not for full multi-page websites.