氢氧化钠使红色石蕊变色的实验延时摄影

生成一段20秒、16:9宽屏的科学实验延时摄影，场景位于受控实验室。一只透明玻璃容器放在整洁的工作台上，内含红色石蕊溶液。一只戴手套并穿戴实验室个人防护装备的手，用滴管缓慢加入少量氢氧化钠水溶液。以特写展示液体混合，红色溶液在真实的扩散与旋涡渐变中逐步变为紫色，再转为蓝色。采用稳定的微距摄影，容器保持清晰对焦，中性实验室光线，准确呈现透明玻璃和液体反光，并使用平滑的加速时间效果。构图简洁、具有教学感。不要出现文字、标志、品牌、源视频或音频。将氢氧化钠表现为腐蚀性化学品，只能在受控实验室中配备适当的眼部、皮肤和手部防护后操作；不要表现飞溅、不安全操作或与人员接触。

【English Prompt】
Generate a 20-second, 16:9 widescreen scientific timelapse in a controlled laboratory. A clear glass vessel contains red litmus solution on a clean workbench. A gloved hand wearing laboratory PPE slowly adds a small amount of aqueous sodium hydroxide with a dropper. Show the liquid mixing in close-up as the red solution progressively shifts through purple toward blue, with realistic diffusion and swirling gradients. Use stable macro cinematography, sharp focus on the vessel, neutral lab lighting, accurate transparent glass and liquid reflections, and smooth accelerated-time motion. Keep the composition uncluttered and educational. Include no text, logos, branding, source footage, or audio. Present sodium hydroxide as a corrosive chemical handled only with appropriate eye, skin, and hand protection in a controlled lab; do not show splashes, unsafe handling, or contact with people.

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

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