[签名规范](%E7%AD%BE%E5%90%8D%E8%A7%84%E8%8C%83.md) [全局返回说明](%E5%85%A8%E5%B1%80%E8%BF%94%E5%9B%9E%E8%AF%B4%E6%98%8E.md) [直充下单说明](%E7%9B%B4%E5%85%85%E4%B8%8B%E5%8D%95%E8%AF%B4%E6%98%8E.md)