Build a pricing page with a region switcher in Tailwind CSS: a compact country/currency selector in the top corner of the pricing grid, and every plan price that re-renders in the chosen currency with the correct symbol and rounding. Show a small 'billed in USD, approximate' footnote when the selected currency is not billed natively, and remember the choice for the session.
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。