.nengaBox.full li,
.nengaBox.half a,
.nengaBox.oneThird a {
  position: relative;
  display: block;
}

.nengaBox.full li:before,
.nengaBox.half a:before,
.nengaBox.oneThird a:before,
.nengaBox.full li:after,
.nengaBox.half a:after,
.nengaBox.oneThird a:after {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
}
.nengaBox.full li:before,
.nengaBox.half a:before,
.nengaBox.oneThird a:before {
  background: rgba(255, 255, 255, 0.75);
  z-index: 5;
  backdrop-filter: blur(1px);
  margin: -3px;
  padding: 3px;
}
.nengaBox.full li:after,
.nengaBox.half a:after,
.nengaBox.oneThird a:after {
  z-index: 50;
}
.nengaBox.oneThird a.linkArw {
  width: fit-content;
}
.nengaBox.oneThird a.linkArw:before,
.nengaBox.oneThird a.linkArw:after {
  margin: 0 0 0 -15px;
  padding: 0 0 0 15px;
}

.nengaBox.full li:after {
  background-image: image-set(url("../img/close_full_w450.png") 1x, url("../img/close_full_w900.png") 2x);
  background-size: cover;
}
.nengaBox.half a:after {
  background-image: image-set(url("../img/index_tile/close_half_w436.png") 1x, url("../img/index_tile/close_half_w872.png") 2x);
  background-size: cover;
}
.nengaBox.oneThird a:not(.linkArw):after {
  background-image: image-set(url("../img/index_tile/close_oneThird_w370.png") 1x, url("../img/index_tile/close_oneThird_w740.png") 2x);
  background-size: cover;
}
@media (min-device-width: 640px) {
  .nengaBox.full li:after {
    background-image: image-set(url("../img/close_full_w900.png") 1x, url("../img/close_full_w1800.png") 2x);
    background-size: cover;
  }
  .nengaBox.oneThird a:not(.linkArw):after {
    background-image: image-set(url("../img/index_tile/close_oneThird_w280.png") 1x, url("../img/index_tile/close_oneThird_w560.png") 2x);
    background-size: cover;
  }
}