Fix use cases page responsiveness

[Prakash1185]

Problem

• Top section image was not visible on smaller screens
• Company logos had overflow issues and were not properly aligned on smaller screens
• Cards layout was not properly responsive for smaller screens
• Only two use cases cards were showing on large screens

Changes Made

• Fixed the top section image visibility issue
• Company logo now shows all the images of companies on smaller screens without overflow
• Improved the card layout
• Now three cards are shown on larger screens, properly centred

Screenshots

Before	After

[Prakash1185]

Hi @SbloodyS, @ruanwenjun
This PR fixes responsiveness and layout issues on the Use Cases page across screen sizes.

Please review and let me know if any further changes are needed. Thank you.