v11 was created by restoring v9

Two changes: section background bg-[#171f1e] → bg-white, and update the header text colours from light to dark since they now sit on white.

The section background is now white with the cards keeping their original dark #1e2928 colour and all their logo zones intact. The heading text is updated to dark forest green #1d3937 and the subtext to muted #5a6b6a so they remain readable on the white background.