Minimalist Dual-Action Landing Page

I need a single-screen, modern landing page that does three things and does them flawlessly. First, it should add a description of a product that I will give.Second, the first call-to-action invites visitors to leave their email; once they hit submit, an on-page thank-you message should appear—no redirects, no fuss. Third, another second button takes buyers straight into payment: clicking it should pass the user to a secure link that can accept the following methods:
• Credit/Debit Card
• PayPal
• Bank Transfer
• UPI

Style must stay clean, modern, and minimalist with responsive behaviour on both mobile and desktop. I’m happy for you to build it in vanilla HTML/CSS/JS, React, or even a lightweight CMS as long as the final code is handed over ready to drop onto my hosting and the payment link is fully wired. Let me test both flows (email capture + thank-you, and payment hand-off) before we wrap up, and include brief setup notes so I can swap out copy or colours later if needed.