Build a credit-pack top-up section with Tailwind CSS: four one-time bundles in a row, each showing credits, price and a 'save X%' badge that grows with bundle size. Mark one bundle 'Best value' with an accent border. Show the per-credit unit price under each bundle, a current-balance strip at the top, and a note that credits never expire.
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。