<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0,user-scalable=no">
<title> 冒号对齐 </title>
<style>
.parent{display:flex}
.left{width:50%}
.left div{text-align: right;}
</style>
</head>
<body>
<div class='parent'>
<div class="left">
<div>
<span> 姓名:</span>
</div>
<div>
<span> 性别:</span>
</div>
<div>
<span> 年龄:</span>
</div>
<div>
<span> 居住地:</span>
</div>
<div>
<span> 电话号码:</span>
</div>
</div>
<div class="right">
<div>
<span> 张三风 </span>
</div>
<div>
<span> 男 </span>
</div>
<div>
<span>11</span>
</div>
<div>
<span> 武当山 </span>
</div>
<div>
<span>13900004444</span>
</div>
</div>
</div>
</body>
</html>
效果: