对话框样式

懒得写 懒得记 so

css

.tip-message{
	border-radius: 8px;
	line-height: 20px;
	padding:0 10px;
	top: 0;
	height: 44px;
	left: 0;
	right: 0;
	background: url('//image1.51tiangou.com/tgou2/img2/cards/bg_coupon.png');
	background-size: cover;
	background-position: center;
}
.tip-message:before {
	content: '';
	width: 0;
	height: 0;
	border: 8px solid;
	position: absolute;
	top: -16px;
	border-color:  transparent transparent #fff1f3;
}
.tip-message:before{

	left: 3.1rem;

}

html

<div class="tip-message">q</div>