# Pricing transparency gap above fold — dev spec
Site: stripe.com · Priority 4 · Medium · Effort: Low (0.5-2 days)

## Problem
Homepage headline does not state what is sold or why it is better in the visitor's words, and pricing details are relegated to a separate page.

## Evidence (from the live site)
> Financial infrastructure to grow your revenue. Accept payments, offer financial services, and implement custom revenue models—from your first transaction to your billionth.

## Current state
h1: Financial infrastructure to grow your revenue. Accept payments, offer financial services, and implement custom revenue models—from your first transaction to your billionth.; notes: No subheadline naming the product or benefit.

## Required change
h1: Financial infrastructure to grow your revenue.; notes: Add subheadline naming payment processing and customer-centric benefit.

## Acceptance criteria
- GIVEN a first-time visitor on the affected page
- WHEN the change is live
- THEN Add subheadline naming payment processing and customer-centric benefit.
- AND no layout regression at 375px / 768px / 1280px
- AND the changed control is keyboard-reachable with an accessible name

## Tracking
- Fire `cro_pricing_transparency_gap_above_fold` on interaction with the changed element
- Verify the event fires in BOTH variants before opening traffic

## Test plan
- Two-proportion z-test, 95% significance, 80% power
- 1,941,808 visitors per variant to detect a 2.0% relative lift
- Run at least one full business cycle; duration depends on traffic

## Rollback
Feature-flag the change; revert if the primary metric drops for 3 consecutive days.