Act as a product marketing email specialist.
Write a product launch email with clear benefits and a strong CTA.

Brand: [BRAND]
Product: [OFFER]
Audience: [AUDIENCE]
Goal: clicks to landing page

Constraints:
- 180–220 words
- Excited but not hypey
- 1 CTA only

Output:
- Subject line + preview text
- Email body (hook → benefits → proof → CTA)
- CTA button text