<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style type="text/css">
* {
	margin: 0;
	padding: 0;
}
li {
	list-style: none;
}
.left-nav {
	width: 100px;
	background-color: #3385FF;
	color: white;
	font-size: 13px;
	padding:1px;
}
.left-nav>ul>li {
	width: 100px;
	line-height: 20px;
	text-align: center;
	position: relative;
}
.left-nav>ul>li:HOVER {
	background-color: navy;
	cursor: pointer;
}
.left-nav>ul>li:HOVER>ul,.left-nav>ul>li:HOVER>h4>div {
	display: block;
}
.left-nav>ul>li>ul {
	display: none;
	position: absolute;
	top: 0px;
	left: 101px;
	color: black;
	width: 100px;
	background-color: #EAEAEA;
	padding: 2px;
}
.arrow-right {
	width: 0;
	height: 0;
	border-top: 8px solid transparent;
	border-bottom: 8px solid transparent;
	border-left: 8px solid yellow;
	float: left;
	display: none;
}
</style>
</head>
<body>
	<div class="left-nav">
		<ul>
			<li>
				<h4><div class="arrow-right"></div>节点列表</h4>
				<ul>
					<li>node-102</li>
					<li>node-103</li>
					<li>node-104</li>
				</ul>
			</li>
			<li>
				<h4><div class="arrow-right"></div>报警记录</h4>
				<ul>
					<li>存活报警</li>
					<li>指标报警</li>
				</ul>
			</li>
			<li>
				<h4><div class="arrow-right"></div>权限管理</h4>
				<ul>
					<li>超级权限</li>
					<li>功能权限</li>
					<li>数据权限</li>
				</ul>
			</li>
			<li>
				<h4><div class="arrow-right"></div>权限管理</h4>
				<ul>
					<li>超级权限</li>
					<li>功能权限</li>
					<li>数据权限</li>
				</ul>
			</li>
		</ul>
	</div>
</body>
</html>
==============================
<!DOCTYPE html> <html> <head> <title>Foundation ʵ��</title> <meta charset="utf-8"> <style type="text/css"> .main { padding: 10px; margin: 10px; height: 400px; background-color: gray; } .main p { width: 200px; background-color: blue; line-height: 40px; padding-left: 50px; cursor: pointer; padding-top: -20px; position: relative; color: white; } .main p:after { content: ''; display: block; top: 0px; left: 250px; position: absolute; width: 0; height: 0; border-top: 20px solid transparent; border-left:40px solid #3388FF; border-bottom: 20px solid transparent; } .main p:before { content: ''; display: block; top: 0px; left: 0px; position: absolute; width: 0; height: 0; border-top: 20px solid transparent; border-left:40px solid #3388FF; border-bottom: 20px solid transparent; } </style> </head> <body style="padding:20px;"> <div class="main"> <p>第</p> <p>第</p> <p>第</p> </div> <p class="arroe">11111</p> </body> </html>
                    
                
                
                
            
        
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