.form-signin {
max-width: 330px;
padding: 15px;
margin: 0 auto;
}

body{
background: #222 url("../images/bg.jpg") no-repeat top center fixed;
transition: background 1s linear;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
font-family:"微软雅黑", "Trebuchet MS",tahoma,arial,helvetica,sans-serif;
}

.jumbotron{
/*background: rgba(216, 216, 216, 0.9);*/
 
box-shadow: 0 0 6px 2px rgba(0, 0, 0, 0.1);
border-radius: 5px;
background: rgba(255, 255, 255, 0.65)
}

.footer{
 	position:absolute;
	bottom: 10px;
	left: 54px;
	width: 100%;
	text-align: center;
 
}

#nav{
	position: absolute;
	bottom: 50px;
	left: 54px;
}
#nav ul{
	list-style: none;
}
#nav ul li{
	float: left;
	margin: 10px 20px;
}
#nav ul li a{
	color: #333;
}

.btn-my{
	width: 68px;
	height: 65px;
	-moz-border-radius: 50%;
	-webkit-border-radius: 50%;
	border-radius: 50%;
	padding: 12px;
	font-size: 26px;


	background:rgba(255,255,255,0.6);
	background: transparent\9;
	zoom:1\8; /* required for the filters */
	-ms-filter:"progid:DXImageTransform.Microsoft.gradient(startColorstr=#99000000, endColorstr=#99000000)"; /* IE8 */
	filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#99000000, endColorstr=#99000000); /* IE5.5-7 */

}