abstract：<html> <head> <meta charset="utf-8"> <link type="text/css" rel="stylesheet" href=
<html>
<head>
<meta charset="utf-8">
<link type="text/css" rel="stylesheet" href="layui/css/layui.css" />
<script type="text/javascript" src="layui/layui.js"></script>
<style type="text/css">
*{margin: 0px; padding: 0px;}
</style>
</head>
<body style="background: #1E9FFF">
<div style=" width: 500px ; margin: 270px auto 0px;">
<div style=" background: #fff; border-radius: 4px; box-shadow:5px 5px 20px #4444; padding: 20px;">
<form class="layui-form">
<div class="layui-form-item" style="color:gray;">
<h2>后台管理系统</h2>
</div>
<hr>
<div class="layui-form-item">
<label class="layui-form-label">用户名</label>
<div class="layui-input-block">
<input type="text" class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">密码</label>
<div class="layui-input-block">
<input type="text" class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">验证码</label>
<div class="layui-input-inline">
<input type="text" class="layui-input">
</div>
</div>
<div class="layui-form-item">
<div class="layui-input-block">
<button class="layui-btn" lay-submit lay-filter="formDemo">登陆</button>
</div>
</div>
</form>
</div>
</div>
</body>
</html>刚开始引入layui类库未生效，最后找到原因为 link标签里没有添加rel="stylesheet"
Correcting teacher：天蓬老师Correction time：2019-04-23 13:25:14
Teacher's summary：发现问题, 找到方案, 是一个学习应有的素质 , 不错