纯css3图标菜单下拉收缩特效

使用方法：

1、head引入css文件

<link rel="stylesheet" href="css/style.css">

2、body引入部分

<div class="swanky_wrapper">
	<input id="Dashboard" name="radio" type="radio">
	<label for="Dashboard">
		<img src="images/cp.png">
		<span>仪表盘</span>
		<div class="lil_arrow"></div>
		<div class="bar"></div>
		<div class="swanky_wrapper__content">
			<ul>
				<li>工具</li>
				<li>报告</li>
				<li>分析</li>
				<li>代码块</li>
			</ul>
		</div>
	</label>
	<input id="Sales" name="radio" type="radio">
	<label for="Sales">
		<img src="images/del.png">
		<span>销售</span>
		<div class="lil_arrow"></div>
		<div class="bar"></div>
		<div class="swanky_wrapper__content">
			<ul>
				<li>新品</li>
				<li>过期</li>
				<li>销售报告</li>
				<li>已售</li>
			</ul>
		</div>
	</label>
	<input id="Messages" name="radio" type="radio">
	<label for="Messages">
		<img src="images/mess.png">
		<span>信息</span>
		<div class="lil_arrow"></div>
		<div class="bar"></div>
		<div class="swanky_wrapper__content">
			<ul>
				<li>收件箱</li>
				<li>发件箱</li>
				<li>发件</li>
				<li>存档</li>
			</ul>
		</div>
	</label>
	<input id="Users" name="radio" type="radio">
	<label for="Users">
		<img src="images/users.png">
		<span>用户</span>
		<div class="lil_arrow"></div>
		<div class="bar"></div>
		<div class="swanky_wrapper__content">
			<ul>
				<li>新用户</li>
				<li>分组</li>
				<li>权限</li>
				<li>密码</li>
			</ul>
		</div>
	</label>
	<input id="Settings" name="radio" type="radio">
	<label for="Settings">
		<img src="images/set.png">
		<span>设置</span>
		<div class="lil_arrow"></div>
		<div class="swanky_wrapper__content">
			<ul>
				<li>数据库</li>
				<li>设计</li>
				<li>更改用户</li>
				<li>退出</li>
			</ul>
		</div>
	</label>
</div>