Payment Page with Bundle Promotion

I’m building a dedicated checkout page whose primary purpose is to push our bundle deals front and center and convert visitors quickly. The page should clearly display the bundled-product savings, guide the shopper straight to payment, and accept digital wallets only (think OVO, GoPay, DANA or other Indonesian e-wallet APIs you’ve worked with). No credit cards or bank transfers for now—just a frictionless, mobile-first e-wallet flow.

Here’s what I need from you:
• Design and code a responsive payment page that fits seamlessly into my existing site’s look and feel.
• Integrate preferred digital-wallet gateways, handle callback/notification logic, and confirm the transaction server-side.
• Highlight bundle promotions dynamically, so pricing and savings update in real time as inventory or campaigns change.
• Minimal customer data capture (name, phone, email) strictly for receipt purposes, then straight to payment.
• Clear, commented code plus a short setup guide so my in-house dev can maintain it after launch.
• Staging link for UAT and support through go-live.

Acceptance criteria: the page loads in <2 s on 4G, completes a sandbox e-wallet purchase end-to-end without errors, and the order plus promo details hit our webhook in the required JSON format.

If you’ve shipped similar high-converting checkout experiences, especially with Indonesian e-wallets, I’d love to see them. Let’s get this live quickly.