灰色线框活页夹三维模型双状态展示

白色背景上并排展示灰色线框办公活页夹/文件夹的展开与合拢形态，横向宽幅构图。左侧为展开状态，露出内侧卡位、插袋、中央环扣夹持的叠放纸张以及伸出的搭扣带；右侧为合拢状态，圆角矩形软质封面，表面覆盖细密网格线框并带有小搭扣。单色灰线框三维模型，产品结构建模展示风格，清晰可见的网格线，平光工作室照明，无人物，无上色纹理，16:9。

A monochrome gray 3D wireframe model of an office binder/organizer on a white background, showing two states side by side in a wide horizontal composition. Left: opened to reveal inner card slots, pockets, a central ring mechanism holding stacked paper inserts, and an extended closure strap. Right: closed rectangular soft cover with a fine grid wireframe and a small tab closure. Technical product modeling render, visible mesh lines, flat studio lighting, no people, no colored textures, 16:9.