The tech company broke away from the suit-and-tie tradition by allowing casual attire at work.

suit-and-tie 是由 suit（西装）和 tie（领带）两个名词通过连字符连接的复合形容词。suit 指正式的西装套装，tie 指领带。suit-and-tie 合起来形容"穿着正式西装打领带"的传统商务着装风格。