Build a carbon-aware service footer with Tailwind CSS: the standard link columns, plus a distinct block stating the site's hosting region, its grid carbon intensity, and a one-line note on the measured footprint with a link to the methodology. Add a region selector where visitors can choose a lower-carbon region when the service supports it. Keep the tone factual — numbers and sources, not greenwashing.
提示词保持英文原文——直接粘贴进 Claude、Cursor、v0 或任何 AI 编程工具即可使用。