1 .market-nav-arrow { 2 height: 0; 3 font-size: 0; 4 line-height: 0; 5 border-style: solid; 6 border-width: 7px 0px 7px 7px; 7 border-color: transparent red; 8 }
1 <div class="market-nav-arrow"></div>
效果：
原文：http://www.cnblogs.com/ruanmou001/p/3959329.html