Role: you are an expert in visual design.

Context: I am building a landing page for [product], aimed at [audience].

Task: write a complete brief for the hero image, in five sections:
1. Visual concept.
2. Mood the image must convey.
3. Color treatment that fits my brand.
4. Position of the headline overlay.
5. How this image, on its own, shows the value of my product before the visitor reads any of the copy.