p{border-top-left-radius:4px;//左上border-top-right-radius:4px;//右上border-bottom-left-radius:4px;//左下border-bottom-right-radius:4px;//右下}下面為簡(jiǎn)寫：

p{border-radius:4px0px0px0px;//分別對(duì)應(yīng)的左上右上右下左下（順時(shí)針記就對(duì)了）}