[15.1底部导航](15.1%E5%BA%95%E9%83%A8%E5%AF%BC%E8%88%AA.md) [15.2首页导航](15.2%E9%A6%96%E9%A1%B5%E5%AF%BC%E8%88%AA.md) [15.3兑换方式](15.3%E5%85%91%E6%8D%A2%E6%96%B9%E5%BC%8F.md)