Two-tier grid layout with angled background sections

This Tailwind CSS code creates a two-tier grid layout for testimonials, with angled background gradient sections for visual interest. The top level is a 1x1 grid with a centered content container. The second level is a responsive 2x2 grid of testimonial blocks. On mobile, the testimonials stack vertically. On larger screens, they arrange in a grid with angled background sections rotated behind.