<div class="cp_card">
コンテンツ
	<div class="cp_ribbon12">
		<div class="cp_ribbon">Ribbon</div>
	</div>
</div>

.cp_card {
	width: 320px;
	height: 340px;
	position: relative;
	background: #ffffff;
	overflow: visible;
	margin: 2em auto;
	padding: 0.5em;
	box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
}
.cp_ribbon12 {
	position: absolute;
	z-index: 200;
	top: 15px;
	width: calc(100% + 20px);
	height: 50px;
	margin-right: -18px;
	margin-bottom: 80px;
	margin-left: -18px;
}
.cp_ribbon12:before, .cp_ribbon12:after {
	position: absolute;
	top: 20px;
	bottom: -10px;
	width: 0;
	height: 0;
	content: '';
	border-width: 20px 20px;
}
.cp_ribbon12:before {
	left: -30px;
	border-style: solid;
	border-color: #F06292 #F06292 #F06292 transparent;
}
.cp_ribbon12:after {
	right: -30px;
	border-style: solid;
	border-color: #F06292 transparent #F06292 #F06292;
}
.cp_ribbon12 .cp_ribbon {
	line-height: 3em;
	position: relative;
	z-index: 100;
	height: inherit;
	margin-bottom: 0;
	text-align: center;
	color: #ffffff;
	background: #F48FB1;
}
.cp_ribbon12 .cp_ribbon:before, .cp_ribbon12 .cp_ribbon:after {
	position: absolute;
	bottom: -10px;
	width: 0;
	height: 0;
	content: '';
	border-top: 10px solid #C2185B;
}
.cp_ribbon12 .cp_ribbon:before {
	left: 0;
	border-left: 10px solid transparent;
}
.cp_ribbon12 .cp_ribbon:after {
	right: 0;
	border-right: 10px solid transparent;
}