<h1 class="cp_h1title">見出しテキスト</h1>

.cp_h1title {
  position: relative;
  text-align: center;
}
.cp_h1title:before,
.cp_h1title:after {
  position: absolute;
  content: '';
  top: 50%;
  width: 44px;/*線の高さ*/
  height: 2px;/*線の太さ*/
  background-color: #00897B;/*線の色*/
  transform: rotate(-60deg);/*ラインに傾斜をつける*/
}
.cp_h1title:before {
  left:0;
}
.cp_h1title:after {
  right: 0;
}