<style type="text/css">        .div1 {            width: 200px;            height: 200px;            background-color: #ff6a00;            border-width: 6px;            margin: 0 auto;        }                    .div2 {            position: relative;            width: 0;            height: 0;            border: 20px solid black;            border-color:transparent  #ffd800 #ffd800 transparent ;            background-color:#fff;            font-size:xx-small;            text-align:left;        }    </style>

  <div class="div1">        <div class="div2">            折角        </div>    </div>