hyg/sidebar.css

## sidebar.css
 .nav .home {
  padding: 12px;
  color: #737373;
  display: inline-block;
  font-size: 14px;
  margin-bottom: 2px;
  margin-right: 4px;
  max-width: 162px;
  overflow: hidden;
  text-overflow: ellipsis;
  vertical-align: bottom;
  cursor: pointer;
   position: absolute;
   top: 0;
}

 .sidebar {
  width: 200px;
  position: absolute;
  top: 0;
  left: -200px;
  bottom: 0;
  background: white;
  -webkit-transition: left .1s .1s linear;
     -moz-transition: left .1s .1s linear;
       -o-transition: left .1s .1s linear;
          transition: left .1s .1s linear;
}

 .nav .sidebar:hover,
 .nav .home:hover + .sidebar {
  left: 0;
  -webkit-box-shadow: 0 0 40px rgba(0,0,0,.4);
     -moz-box-shadow: 0 0 40px rgba(0,0,0,.4);
       -o-box-shadow: 0 0 40px rgba(0,0,0,.4);
          box-shadow: 0 0 40px rgba(0,0,0,.4);
}

.sidebar ul li {
  padding: 10px 20px;
  list-style-type:none;
}

.sidebar ul li:not(.devider):hover {
  background: #EEEEEE;
}

## sidebar.html
<!DOCTYPE html>
<html lang="zh-cmn-Hans">
	<head>
		<meta charset="UTF-8">
		<link rel="stylesheet" type="text/css" href="sidebar.css" />
	</head>
	<body>
		<!--content begin-->

		<!--content end-->


		<div class="nav">
			<div class="home">
			  <span><img src="favicon.ico"></img></span>
			</div>
			<div class="sidebar">
				<ul>
					<li>
					  <span>Home</span>
					</li>
					<li class="devider"></li>
					<li>
					  <span>Profile</span>
					</li>
					<li>
					  <span>Circles</span>
					</li>
					<li>
					  <span>Photos</span>
					</li>
					<li class="devider"></li>
				</ul>
			</div>
		</div>
	</body>
</html>