* {
	margin:0;
	padding:0;
}
ul {
	width:100%;
	margin-top:200px;
	text-align:center;
	font-size:0;
}
ul li {
	display:inline-block;
	padding:8px 20px;
	font-size:14px;
	color:#222;
	border:1px solid #ddd;
	margin-right:20px;
	border-radius:4px;
	position:relative;
	cursor:pointer;
}
ul li.active:before {
	content:'';
	display:block;
	height:0;
	width:0;
	font-size:0;
	border:10px solid transparent;
	border-right:10px solid #008028;
	border-bottom:10px solid #008028;
	position:absolute;
	right:0;
	bottom:0;
}
ul li.active {
	border:1px solid #008028;
}
.icon {
	display:none;
	position:absolute;
	color:#fff;
	font-size:14px;
	bottom:-1px;
	right:2px;
}
ul li.active .icon {
	display:block;
}