示例

html

<div id="crumbs">
        <ul>
            <li><span class="current">数据导入</span></li>
            <li><span>数据预览</span></li>
            <li><span>完成</span></li>
        </ul>
    </div>

css

#crumbs {
            margin: 10px 0;
        }
        #crumbs ul {
            list-style: none;
            display: inline-table;
            width: 100%;
            padding: 0 3%;
        }
        #crumbs ul li {
            display: inline;
        }
        #crumbs ul li span {
            display: block;
            float: left;
            width: 30%;
            height: 40px;
            line-height: 40px;
            background: #f8f8f8;
            text-align: center;
            position: relative;
            margin: 0 10px 0 0;
            font-size: 14px;
            text-decoration: none;
        }
        #crumbs ul li span.current {
            background: #21b9bb;
            color: #fff;
        }
        #crumbs ul li span:after {
            content: "";
            border-top: 20px solid transparent;
            border-bottom: 20px solid transparent;
            border-left: 20px solid #f8f8f8;
            position: absolute;
            right: -20px;
            top: 0;
            z-index: 1;
        }
        #crumbs ul li span.current:after {
            border-left: 20px solid #21b9bb;
        }
        #crumbs ul li span:before {
            content: "";
            border-top: 20px solid transparent;
            border-bottom: 20px solid transparent;
            border-left: 20px solid #fff;
            position: absolute;
            left: 0;
            top: 0;
        }
        #crumbs ul li:first-child span {
            border-top-left-radius: 4px;
            border-bottom-left-radius: 4px;
        }
        #crumbs ul li:first-child span:before {
            display: none;
        }
        #crumbs ul li:last-child span {
            border-top-right-radius:4px;
            border-bottom-right-radius: 4px;
        }
        #crumbs ul li:last-child span:after {
            display: none;
        }