白色粒子场 I

Use this MotionSites background video as a looping website background asset.
Title: Motion Background 7
Category: background
License: 付费
Video URL: https://stream.mux.com/ef2TghmWccnsK54qnxtFWjv36zXb01cK02CAfgDNQMgn4.m3u8
Local thumbnail: thumbnails/ca381c35-50d3-41a2-a636-a68abd3845bf.png
Implementation requirements:
- Render the video as a muted, autoplay, looped, playsInline background layer.
- Use object-fit: cover and keep the focal motion visible on desktop and mobile.
- Add a readable overlay only when foreground text needs contrast.
- Keep controls hidden for decorative background use, and provide a poster/thumbnail fallback.
- Respect the MotionSites authorization state before using this asset in a commercial project.