/* 斜め背景の下線 */
.under-naname-basic span {
  display: inline-block;
  line-height:1.2;
  min-height: 1em;
  position: relative;
  z-index: 10;
}

.under-naname-basic span::after {
  content: "";
  display: inline-block;
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(-45deg, #ff1481 0%, #ff1481 25%, #fff 25%, #fff 50%, #ff1481 50%, #ff1481 75%, #fff 75%, #fff 100%)repeat fixed;
  background-size: 10px 10px;
  z-index: -1;
}