Mathematical Visualization Infographic Prompt

Please create a math-visualization infographic about 「{argument name="topic" default="a math concept / topic"}」, aiming to help the reader intuitively understand: what it is, why it holds true, what the geometric / structural intuition behind it is, and how it manifests in different scenarios. The image should look like a high-quality math lecture handout combined with a hand-drawn educational poster — elegant, clear, and information-rich, but not cluttered. Visual style: {argument name="aspect ratio" default="either portrait or landscape is fine"}, a clean, light-colored paper background, dark blue titles, black / dark gray body-text lines, paired with a small amount of elegant blue, teal, gold, and red accent colors. Use rounded cards, thin-line borders, numbered labels, hand-drawn arrows, close-up magnified boxes, and a summary bar. The overall look should be attractive, balanced, and academic, letting the viewer grasp the concept's "structure" and "why" at a single glance.