数学讲义与手绘海报合体的图解
填一个数学概念，出一张圆角卡片、编号、手绘箭头齐全的讲义式信息图。
写法要点
✍️ 整条提示词里没有一个具体公式，却能出像样的讲义，靠的是“它是什么、为什么成立、几何直觉、不同情境”这四问。先排这四问，再写样式。强调色限定四种，页面才不会花。
完整提示词
📋 提示词 自然语言968 字符
Topic: "[math concept / topic]". Design a visual explainer on it, one that teaches a viewer by sight what the idea is, the reason it holds, the geometric or structural picture underneath, and the way it plays out across different contexts.
Think of two things merged: a well-made lecture handout and a hand-drawn classroom poster. Aim for elegant, lucid, dense with information, yet never crowded.
Styling notes. Orientation is open (portrait or landscape). Ground everything on a light, clean, paper-like background, with the title in deep blue and the body content in black or dark gray lines. Use accent colors sparingly and keep them refined: blue, teal, gold, red. Structure: rounded-corner cards edged with thin borders, numbered labels, hand-drawn arrows, zoom-in callout boxes, and a summary block at the end.
The finished piece should feel pleasing, balanced and scholarly, so that anyone can see the skeleton of the concept and why it works in one glance.
📋 中文译写版 自然语言
做一张用可视化方式讲解“[数学概念 / 主题]”的信息图。要让观者直观理解它是什么、为什么成立、背后的几何或结构直觉，以及它在不同情境下的表现。
感觉：高质量的数学课讲义，加上手绘教学海报的味道。优雅、清晰、信息丰富，但不杂乱。
外观与版式：竖版横版都可以。以干净、浅色、类似纸张的背景为底；标题用深蓝，主体内容用黑色或深灰线条。只加少量精致的强调色：蓝、青、金、红。页面由圆角卡片、细边框、编号标签、手绘箭头、放大镜式的标注框和收尾的总结区构成。
整体设计要好看、均衡、有学术感，让人一眼读懂概念的结构和它成立的原因。
