海螺结构的靛蓝蓝晒

Use case: stylized-concept. Asset type: standalone 3:2 landscape case image. Primary request: a cyanotype study of spiral seashell sections and growth geometry arranged on deep indigo paper, no labels. Visual approach: stencil printing, 叙事场景版; keep the medium appropriate to the subject. Composition: one coherent scene, crisp material edges, believable spatial relationships. Constraints: no collage, no grid, no logo, no watermark, no readable text.

生成一张独立的3:2横幅案例图：深靛蓝纸上的海螺螺旋剖面与生长几何蓝晒研究，无标签。视觉方法采用孔版印刷的叙事场景版，媒介须与主题匹配。保持单一连贯场景、清晰材质边缘与可信空间关系；不要拼贴、网格、标志、水印或可读文字。