Build a footer with an overlapping CTA card in Tailwind CSS: a dark footer with a white (or light) rounded card overlapping its top edge via negative margin, holding a headline, a short line and a primary button. Below the card, the standard link columns and legal row. Keep the card centered and narrow (max-w-3xl), and make sure the overlap reads cleanly at every breakpoint.
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。