Comparing with the Design system, the proportion of the intro text (in pixels) with the live site it’s tiny different.

Checking on screens of 1440px

Design
intro text width: 736px

Page
intro text width: 667px

It has almost 70px of difference.

The current code defines a max-width of 80% on screens medium and up, and 60% for large screen.

Sample page: https://www.greenpeace.org/international/tag/health/