I am having an e-commerce site and current URL structure is like this:

• www.example.com/category1 [Category landing page]
• www.example.com/category1/sub-category [sub-category listing page]
• www.example.com/category1/sub-category/product-name [Product Details page]

I am finding it difficult to identify from the URLs whether the URL is category landing page or a listing page or a product details page (primarily in Google Analytics). To solve this problem, I am thinking of adding qualifiers in the URL as follows:

• www.example.com/category1/cat-land [Category landing page]
• www.example.com/category1/sub-category/cat-list [sub-category listing page]
• www.example.com/category1/sub-category/product-name/prod-details [Product Details page]

Original URLs would be redirected to new URLs using 301 permanent redirect.

Would this have any negative effect on existing SEO and Google ranking?