.article .item:nth-child(1n) {
	background-color: #fff;
}

.article .item:nth-child(2n) {
	background-color: #eee;
}

.article .item:nth-child(3n) {
	background-color: #B4E0E1;
}

.article .item {
	padding: 20px;
}

.article .item .title {
	font-size: 17px;
	text-align: center;
}

.article .item .img {
	float: left;
	width: 400px;
}

.article .item .img img {
	width: 100%;
	height: auto;
	-webkit-border-radius: 8px;
	-moz-border-radius: 8px;
	border-radius: 8px;
}

.article .item .txt {
	float: right;
	width: 500px;
}




.txt {
	margin: 0;
	padding: 20px;
	position: relative;
	-webkit-border-radius: 8px;
	-moz-border-radius: 8px;
	border-radius: 8px;
	background: #eee;
}

.txt:after, .txt:before {
	right: 100%;
	top: 60px;
	border: solid transparent;
	content: " ";
	height: 0;
	width: 0;
	position: absolute;
	pointer-events: none;
}

.txt:after {
	border-color: rgba(255, 255, 255, 0);
	border-right-color: #eee;
	border-width: 20px;
	margin-top: -20px;
}
.txt:before {
	border-color: rgba(194, 225, 245, 0);
	border-width: 26px;
	margin-top: -26px;
}

.item:nth-child(2n) .txt,
.item:nth-child(3n) .txt
{
	background: #fff;
}

.item:nth-child(2n) .txt:after,
.item:nth-child(3n) .txt:after
{
	border-right-color: #fff;
}