UI 颜色切换交互动效（约 15 秒）

Motion Graphics

一支用 HTML、CSS 和 JavaScript seek(t) 时间函数实现的界面颜色交互动效，规格为 1440×1440 方形、60 fps、约 15.37 秒，含音频。仓库提供预览视频、源码压缩包和投稿说明文档，源码以 zip 形式附带，需要解压后使用。适合做 App 主题切换、换肤功能演示，或作为小红书、视频号的方形 UI 动效素材。

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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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UI 颜色切换交互动效（约 15 秒） | MotionSites