蓝笔在牛皮购物袋上书写

20秒、16:9的产品展示风格近距离镜头。一支蓝色圆珠笔在素色购物袋粗糙的棕色牛皮纸表面书写，笔画清晰而有意。让笔尖、蓝色墨迹、纸张纤维、褶皱以及纹理袋面带来的轻微阻力保持清晰可见。连续展示书写过程：笔尖按压、拖动，并在不平整的纸面上留下可见的蓝色线条。采用稳定的微距构图、自然的手部动作、柔和均匀的光线和简洁无杂物的中性背景。不要文字叠加、标志、额外物体、源视频或音频输入。

【English Prompt】
20-second 16:9 close-up product-style shot. A blue ballpoint pen writes clear, deliberate strokes across the rough brown paper surface of a plain shopping bag. Keep the pen tip, blue ink marks, paper fibers, creases, and slight resistance of the textured bag in sharp focus. Show the interaction continuously as each stroke presses, drags, and leaves visible blue lines on the uneven paper. Use steady macro framing, natural hand movement, soft even lighting, and a neutral uncluttered background. No text overlays, logos, extra objects, source video, or audio input.

【推荐生成参数】audio_control.mode=native · duration=20 · ratio=16:9 · resolution=768P

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