css 实现箭头步骤条

<!DOCTYPE html>
<html lang="en">
 
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .main {
            width: 90%;
            margin: 50px auto;
        }
 
        .step-item {
            width: 15%;
            float: left;
            position: relative;
            padding: 5px 0 5px 8px;
            line-height: 20px;
            background: #000;
            text-align: center;
            font-size: 14px;
            color: #fff;
            margin-right: 8px
        }
 
        .step-item::before {
            content: ' ';
            display: block;
            width: 0;
            height: 0;
            border-style: solid;
            border-width: 15px 0 15px 10px;
            border-color: transparent transparent transparent #000;
            position: absolute;
            top: 0;
            left: 0;
            border-left-color: #fff;
            z-index: 1;
        }
 
        .step-item::after {
            content: ' ';
            display: block;
            width: 0;
            height: 0;
            border-style: solid;
            border-width: 15px 0 15px 10px;
            border-color: transparent transparent transparent #000;
            position: absolute;
            top: 0;
            right: -10px;
            z-index: 2;
        }
 
        .step-item:hover {
            background: #1565c0;
        }
 
        .step-item:hover:after {
            border-left-color: #1565c0;
        }
    </style>
</head>
 
<body>
 
    <div class="main">
        <div class="step-item">
            需求讨论
        </div>
        <div class="step-item">
            产品设计
        </div>
        <div class="step-item">
            开发制作
        </div>
        <div class="step-item">
            功能测试
        </div>
        <div class="step-item">
            最终阶段
        </div>
    </div>
</body>
 
</html>