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弹珠机械加法计算机

3D Scene

一个单文件 HTML 的 3D 弹珠计算机，致敬 Wintergatan 弹珠机与 Digi-Comp II，只靠弹珠滚过机械翻转开关完成两个 4 位二进制数相加，结果从开关状态读出。木板、黄铜开关、玻璃弹珠配暖色灯光，带 DEMO 自动演示与点击音效，成片为交互 Demo 录屏。适合科普计算原理和 3D 技术展示。

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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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