在table中设置border-radius发现不起作用，网上查找了一番，原因是border-collapse:collapse和border-radius不兼容。

设计图效果


在table表格中实现圆角效果_不兼容 852010-20170621153640054-1466593827.jpg 

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
        #table_wrap > table {
            font-size: 16px;
            text-align: center;
            margin: 0 auto;
            border-collapse: separate;
            border-spacing: 0;
            border: 2px #000;
        }

        table thead tr,table tbody tr {
            height: 50px;
            line-height: 50px;
            /*background-color: pink;*/
        }
        table tr th:first-child,table tr td:first-child {/*设置table左边边框*/
            border-left: 2px solid #eaeaea;
        }
        table tr th:last-child,table tr td:last-child {/*设置table右边边框*/
            border-right: 2px solid #eaeaea;
        }
        table tr td:first-child,
        table tr td:nth-child(2),
        table tr td:nth-child(3),
        table tr td:last-child{/*设置table表格每列底部边框*/
            border-bottom: 2px solid #eaeaea;
        }
        /*table tr:last-child td:first-child,
        table tr:last-child td:nth-child(2),
        table tr:last-child td:nth-child(3),
        table tr:last-child td:last-child{/!*设置table表格最后一列底部边框*!/
            border-bottom: 2px solid #000;
        }*/
        table tr th {
            background: #eaeaea;
        }
        table tr:first-child th:first-child {
            border-top-left-radius: 12px;
        }

        table tr:first-child th:last-child {
            border-top-right-radius: 12px;
        }
        table tr:last-child td:first-child {
            border-bottom-left-radius: 12px;
        }

        table tr:last-child td:last-child {
            border-bottom-right-radius: 12px;
        }

    </style>
</head>
<body>
<div id="table_wrap">
    <table class="table" width="800" cellspacing="0" cellpadding="0">
        <thead class="table_head">
        <tr>
            <th>头部1</th>
            <th>头部2</th>
            <th>头部3</th>
            <th>头部4</th>
        </tr>
        </thead>
        <tbody>
        <tr>
            <td>1内容1</td>
            <td>1内容2</td>
            <td>1内容3</td>
            <td>1内容4</td>
        </tr>
        <tr>
            <td>2内容1</td>
            <td>2内容2</td>
            <td>2内容3</td>
            <td>2内容4</td>
        </tr>
        <tr>
            <td>3内容1</td>
            <td>3内容2</td>
            <td>3内容3</td>
            <td>3内容4</td>
        </tr>
        </tbody>
    </table>
</div>
</body>
</html>