> For the complete documentation index, see [llms.txt](https://docs.galaxypay.vn/upc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.galaxypay.vn/upc/payment-gateway/payment-solution/modal-checkout/integration-guide-for-web-desktop-and-mobile-browser.md). # Integration Guide for Web Desktop & Mobile Browser * Step 1: Import tag \ for responsive * Step 2: Import tag \
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