You now know how to design an e-commerce product page.
Architecture: Gallery + Info + Add to Cart above fold. Tabs below.
Gallery: Zoom, thumbnails, lazy loading. Swipeable on mobile.
Variants: Update images, price, and availability on selection.
Add to cart: Optimistic update. Clear feedback states.
Reviews: Summary above fold. Full reviews below with sorting.
SEO: SSR, structured data, semantic HTML.
Performance: Optimize images. Code split below-fold content.
Interview tip: Discuss conversion optimization alongside technical design.