leavlzi/gist:7228590

## gistfile1.html
<!DOCTYPE html>
<html>
<head>
    <title>CSS实现三角形缺口</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>

<style type="text/css">
html, body {
  height: 100%;
}
.title-wrap{
    position: relative;
    display: block;
    width: 100px;
    height: 100px;
    background: #ff0000;
}
.wrap{
  height:100%;
}
.title-wrap b{
    position: absolute;
    top: 45px;
    right: 0px;
    line-height: 0;
    font-size: 0;
    border-right: 7px solid #ffffff;
    border-top: 7px dashed transparent;
    border-bottom: 7px dashed transparent;
}
</style>

<div id="wrap">


    <div class="test">

        <span class="title-wrap">
            优惠
            <b></b>
        </span>

    </div>

</div>
</body>
</html>
	<!DOCTYPE html>
	<html>
	<head>
	<title>CSS实现三角形缺口</title>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	</head>
	<body>

	<style type="text/css">
	html, body {
	height: 100%;
	}
	.title-wrap{
	position: relative;
	display: block;
	width: 100px;
	height: 100px;
	background: #ff0000;
	}
	.wrap{
	height:100%;
	}
	.title-wrap b{
	position: absolute;
	top: 45px;
	right: 0px;
	line-height: 0;
	font-size: 0;
	border-right: 7px solid #ffffff;
	border-top: 7px dashed transparent;
	border-bottom: 7px dashed transparent;
	}
	</style>

	<div id="wrap">


	<div class="test">

	<span class="title-wrap">
	优惠
	<b></b>
	</span>

	</div>

	</div>
	</body>
	</html>