Agent Hero — Référence de design web et prompt

# Prompt: Nova Agent, light 3D robot landing page

Build a single-file **three-section landing page** for a fictional on-chain AI agent product, **NOVA AGENT** ("Thinking Machines"). Use plain HTML, CSS and vanilla JS, plus **three.js 0.160.0** as an ES module through an import map. There is no framework and no build step.

The page is warm paper-white with thin dark grid lines. A cute boxy white-ceramic robot is built entirely in three.js and stays fixed on a full-screen canvas behind the content:
- **Intro:** the robot stands on a charcoal pedestal with its head tilted.
- **Product:** the camera glides in to a close-up of the head.
- **Reviews:** the face screen swaps its two glowing eyes for a quote mark.

## Assets (all external URLs used)

- **three.js core:** https://unpkg.com/three@0.160.0/build/three.module.js