I want a clean, single-scroll landing page built on WordPress with WooCommerce or Shopify that lets visitors sign up through a short registration form, see our current promotional offers, and pay instantly through PhonePe, Paytm, or a direct bank-transfer option. As soon as a payment succeeds, the system must generate an invoice and send it both by email and via WhatsApp to the buyer. I’m flexible on design—feel free to suggest a lightweight theme or starter template you think will convert well—but the page has to load fast on mobile, look trustworthy, and be easy for me to update later through the WordPress dashboard. To make everything run smoothly you can lean on WooCommerce, Razorpay/Paytm plugins, a custom PHP webhook, or any other approach you’re comfortable with, as long as: • Payments clear reliably on all three methods and reflect in the dashboard • An automatically numbered PDF invoice is mailed and WhatsApp-messaged immediately after payment • I can export order and registration data to CSV from the back end • The whole flow is tested end-to-end before hand-over, including a live transaction on each gateway