.tit_style01{
 font-size: 24px;
 font-size: 2.4rem;
 text-align: center;
 padding: 0 0 15px;
 margin: 0 0 30px;
 position: relative;
}

.tit_style01:after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translate(-50%,-50%);
  width: 40px;
  height: 4px;
  background: var(--main-color);
}