<h1 class="cp_headline04">見出しテキスト</h1>

.cp_headline04 {
	position: relative;
	padding: 0.3em 0.3em 0.3em 0.8em;
	color: #ffffff;
	border-radius: 8px;
	background-color: #29b6f6;
	text-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
}
.cp_headline04::before,
.cp_headline04::after {
	position: absolute;
	width: 20px;
	height: 20px;
	content: '';
	border-width: 2px 0 0 2px;
	border-style: solid;
	border-color: #b3e5fc;
	border-radius: 8px 0 0 0;
}
.cp_headline04::before {
	top: 3px;
	left: 3px;
}
.cp_headline04::after {
	right: 3px;
	bottom: 3px;
	-webkit-transform: scale(-1,-1);
	        transform: scale(-1,-1);
}