Build a base-plan-plus-add-ons pricing layout with Tailwind CSS: a base plan card with its monthly price, and below it a grid of add-on modules as toggle cards — each with a name, a one-line benefit and a monthly price that flips a running total when selected. Keep the running total sticky at the bottom of the section with a checkout button reflecting the exact configuration.
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。