Build a per-seat pricing card with Tailwind CSS: a quantity stepper with minus/plus buttons and an editable number input, a per-seat price, and a monthly total that recalculates live with a subtle count-up animation. Break the total down as 'X seats × $Y/seat/month', and show a volume-discount note when the seat count crosses a threshold. Keep the CTA button in sync with the current total.
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。