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人体心脏三维结构拆解

3D Scene

单文件 Three.js 交互式 3D 心脏：深红心肌表面布满红色动脉和蓝色静脉，内部可见四个心腔、四个瓣膜、主动脉、肺动脉和传导系统。心脏约每秒跳动一次，瓣膜同步开合，蓝色血液流入、红色流出，可拖拽旋转缩放，并支持爆炸分解加标签。适合做医学科普和人体结构讲解。

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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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