<h1 class="cp_headline02">見出しテキスト</h1>

.cp_headline02 {
	position: relative;
	padding: 0.3em 0.3em 0.3em 0.8em;
	color: #ffffff;
	background: #0d47a1;
	-webkit-box-shadow: 0 1px 1px 0 inset rgba(0, 0, 0, 0.6);
	        box-shadow: 0 1px 1px 0 inset rgba(0, 0, 0, 0.6);
	text-shadow: 0 1px 1px rgba(0, 0, 0, 0.6);
}
.cp_headline02::before,
.cp_headline02::after {
	position: absolute;
	width: 0;
	height: 51.95px;
	content: '';
	-webkit-transform: rotate(45deg);
	        transform: rotate(45deg);
	border-width: 0 0 0 4px;
	border-style: double;
	border-color: #4dd0e1;
}
.cp_headline02::before {
	right: 10px;
	bottom: -15px;
}
.cp_headline02::after {
	top: -15px;
	left: 10px;
}