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可改写物理定律的三维实验室

3D Scene

一个可完全交互的 3D 物理实验室：用户可实时改写物理定律，让重物向上坠落、摩擦力反向、碰撞动量侧向偏转、液体彼此排斥。场景强调真实的三维空间纵深，包含体积液体、旋转刚体、分层试验舱和重力区，各种改写在整个世界中保持数学一致。适合做物理科普和交互演示录屏。

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You are an expert web designer. Build a stunning, production-ready page with
a bold hero section, smooth CSS transitions and a carefully tuned dark palette.
Use a neutral background, generous rounded corners and one electric accent color.
Structure the layout with a sticky header, feature grid, social proof and a final
call to action. Keep typography tight, spacing consistent and motion subtle.

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