<style> .up{ width:0; height:0; border: 100px solid transparent; border-top: 100px solid red;/*红色*/ } .down{ width:0; height:0; border: 100px solid transparent; border-bottom: 100px solid blue;/*蓝色*/ } .left{ width:0; height:0; border: 100px solid transparent; border-left: 100px solid pink;/*黑色*/ } .right{ width:0; height:0; border: 100px solid transparent; border-right: 100px solid pink;/*黄色*/ } </style> <body> <div class="up"></div> <div class="down"></div> <div class="left"></div> <div class="right"></div> </body> 实现效果
