layui,相当快速的前端搭建，真的是菜鸟级
<!DOCTYPE html>
<html>
<head>
<title>登陆</title>
<link rel="stylesheet" type="text/css" href="static/plugins/layui/css/layui.css">
<script type="text/javascript" src="static/plugins/layui/layui.js"></script>
</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" 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" placeholder="请输入用户名" 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="password" placeholder="请输入用户名" 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="password" placeholder="请输入验证码" class="layui-input">
</div>
<img src="static/images/yz.png">
</div>
<div class="layui-form-item">
<div class="layui-input-block">
<button class="layui-btn" lay-submit="" lay-filter="demo1">立即提交</button>
<button type="reset" class="layui-btn layui-btn-primary">重置</button>
</div>
</div>
</form>
</div>
</div>
</body>
</html>