Build a pricing badge callout strip with Tailwind CSS: a slim full-width strip with an accent background announcing a promotion ("Spring sale — 20% off annual plans"), a countdown timer to the offer end, and a CTA link; add a dismiss button that hides it for the session. Include a variant that sits above a pricing table as a bordered callout with a small badge icon, and make the countdown degrade to a plain date when JavaScript timing is unavailable.
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。