<h1 class="cp_h1title">見出しテキスト</h1>
.cp_h1title {
position: relative;
display: inline-block;
padding: 0 17%;
text-align: center;
color:#01579B;
}
.cp_h1title:before, .cp_h1title:after {
content: '';
position: absolute;
top: 50%;
display: inline-block;
width: 15%;
height: 3px;
border-top: 3px double #03A9F4;
}
.cp_h1title:before {
left:0;
}
.cp_h1title:after {
right: 0;
}