洞穴气候的粉笔分析图

Create one standalone 3:2 landscape image: a blackboard-style diagram of airflow, humidity and cave chambers drawn with white and muted blue chalk, symbols only, no readable words. Visual approach: Cold and warm complement each other. Keep a single coherent scene with crisp material edges and believable spatial relationships. No collage, no grid, no logo, no watermark, and no readable text.

生成一张独立的 3:2 横幅图像：用白色与灰蓝粉笔绘制洞穴气流、湿度和洞室关系，只用符号，不出现可读文字。视觉方法采用冷暖互补。保持单一连贯场景，材质边缘清晰，空间关系可信；不要拼贴、网格、标志、水印或可读文字。