body{
    text-align: center;
    font-family:"凸版文久ゴシック Pr6N", "arial unicode ms";
}

h1 {
  position: relative;
  padding: 1.5rem 1.5rem calc(1.5rem + 10px);
  border: 2px solid #000;
}

h1:after {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 10px;
  content: '';
  border-top: 2px solid #000;
  background-image: -webkit-repeating-linear-gradient(135deg, #000, #000 1px, transparent 2px, transparent 5px);
  background-image: repeating-linear-gradient(-45deg, #000, #000 1px, transparent 2px, transparent 5px);
  background-size: 7px 7px;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}