strong {
  font-weight: bold;
}

.ir-materials_dw-link {
  position: relative;
  border-radius: 50px;
}
.ir-materials_dw-link span::after {
  position: absolute;
  right: 50px;
  top: calc(50% - 9px);
}

.ir-tab_btn {
  display: flex;
  height: 54px;
  align-items: center;
  justify-content: center;
  text-align: left;
  padding: 0 20px;
}
@media (max-width: 640px) {
  .ir-tab_btn {
    display: block;
    height: auto;
    text-align: center;
    padding: 10px 2px 5px;
    font-size: 11px;
  }
}

@media (max-width: 640px) {
  .ir-tab_btn-list li {
    display: flex;
  }
}

.ir-materials_list {
  padding-right: 0;
}

.ir-materials_list a {
  padding-right: 36px;
}

.ir-schedule {
  word-break: break-word;
}
.ir-schedule .date {
  width: 80px;
}

.ir-site_card dt a {
  padding-right: 30px;
  display: inline-block;
}
.ir-site_card dt a::after {
  right: 0;
}

.ir-site_card dt {
  line-height: 1.2;
}

.card04 dt a {
  margin-top: 15px;
}
@media (max-width: 640px) {
  .card04 dt a {
    margin-top: 0;
  }
}

.card04 dt, .card05 dt, .card06 dt {
  height: 168px;
}
@media (max-width: 640px) {
  .card04 dt, .card05 dt, .card06 dt {
    height: auto;
  }
}

.ir-site_list a {
  padding: 16px 20px;
}
@media (max-width: 640px) {
  .ir-site_list a {
    padding: 14px 30px 14px 14px;
  }
}

.ir-site_btn {
  text-align: center;
}
.ir-site_btn span {
  position: relative;
}

.ir-site_btn span::after {
  position: absolute;
  right: -50px;
  top: calc(50% - 8px);
}