neon flux（d21dfa4e）

Use this MotionSites background video as a looping website background asset.
Title: Neon Flux
Category: background
License: 付费
Video URL: https://d8j0ntlcm91z4.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/hf_20260306_115329_5e00c9c5-4d69-49b7-94c3-9c31c60bb644.mp4
Local thumbnail: thumbnails/d21dfa4e-1b63-4604-83aa-742d67920c21.jpg
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.