@media (min-width: 768px) {
  .sp-only {
    display: none !important;
  }
}
@media (max-width: 767px) {
  .pc-only {
    display: none !important;
  }
}
.article-wrap {
  padding-block: 60px 80px;
}
@media (max-width: 767px) {
  .article-wrap {
    padding-block: 50px 70px;
  }
}

.article__head {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 5px 10px;
  justify-content: space-between;
}
.article__info {
  line-height: 1;
}
.article__category {
  font-size: 12px;
}
.article__courses {
  display: inline-flex;
  gap: 10px;
  margin-left: 15px;
}
@media (max-width: 767px) {
  .article__courses {
    gap: 6px;
    margin-left: 8px;
  }
}
.article__course {
  font-size: 14px;
  font-weight: var(--font-weight-medium);
}
@media (max-width: 767px) {
  .article__course {
    font-size: 13px;
  }
}
.article__course + .article__course {
  border-left: 1px solid var(--border-color);
  padding-left: 10px;
}
@media (max-width: 767px) {
  .article__course + .article__course {
    padding-left: 7px;
  }
}
.article__course--elementary {
  color: var(--elementary-dark-color);
}
.article__course--jrhighschool {
  color: var(--jrhighschool-dark-color);
}
.article__course--highschool {
  color: var(--highschool-dark-color);
}
.article__date {
  color: var(--gray);
}
@media (max-width: 767px) {
  .article__date {
    font-size: 12px;
    letter-spacing: 0;
  }
}
.article__h1 {
  font-size: 32px;
  font-weight: var(--font-weight-base);
  letter-spacing: 0.1em;
  line-height: 1.6;
  margin-top: 15px;
}
@media (max-width: 767px) {
  .article__h1 {
    font-size: 24px;
  }
}
.article__thumbnail {
  margin-top: 50px;
}
@media (max-width: 767px) {
  .article__thumbnail {
    margin-top: 30px;
  }
}
.article__thumbnail img {
  width: 100%;
}
.article__read {
  margin-top: 40px;
}
@media (max-width: 767px) {
  .article__read {
    margin-top: 30px;
  }
}
.article__read p + p {
  margin-top: 1em;
}
.article__outline {
  border-radius: 15px;
  border: 1px solid var(--light-color);
  margin: 40px auto 0;
  max-width: 800px;
}
@media (max-width: 767px) {
  .article__outline {
    margin-top: 30px;
  }
}
.article__outline-header {
  font-size: 18px;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.1em;
  padding: 30px 50px;
}
@media (max-width: 767px) {
  .article__outline-header {
    font-size: 16px;
    padding: 15px 20px;
    text-align: center;
  }
}
.article__outline-body {
  margin-top: -20px;
  padding: 0 50px 40px;
}
@media (max-width: 767px) {
  .article__outline-body {
    margin-top: -15px;
    padding: 0 20px 25px;
  }
}
.article__outline-lists {
  counter-reset: outlineNum 0;
  width: 100%;
}
@media (max-width: 767px) {
  .article__outline-lists {
    font-size: 14px;
    letter-spacing: 0;
  }
}
.article__outline-lists .article__outline-lists {
  padding-left: 1em;
}
.article__outline-list {
  color: var(--light-color);
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.25em;
  line-height: 1.6;
  margin-top: 1em;
}
.article__outline-list::before {
  color: var(--body-color);
  counter-increment: outlineNum 1;
  content: counters(outlineNum, "-") ".";
  flex-shrink: 0;
}
.article__outline-item {
  flex: 1;
}

.article-tag {
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-top: 80px;
  padding-top: 20px;
}
@media (max-width: 767px) {
  .article-tag {
    margin-top: 60px;
  }
}
.article-tag__ttl {
  background: url(/assets/img/ico-tag-light.svg) left center/16px no-repeat;
  font-size: 15px;
  font-weight: var(--font-weight-bold);
  padding-left: 22px;
}
.article-tag__body {
  margin-top: 2px;
}
.article-tag__body .tags {
  gap: 8px 10px;
}

.article-share {
  margin-top: 80px;
}
@media (max-width: 767px) {
  .article-share {
    margin-top: 60px;
  }
}
.article-share__ttl {
  font-size: 18px;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.1em;
  text-align: center;
}
@media (max-width: 767px) {
  .article-share__ttl {
    font-size: 16px;
  }
}
.article-share__ttl-inner {
  align-items: center;
  display: flex;
  gap: 1em;
  justify-content: center;
}
.article-share__ttl-inner::before, .article-share__ttl-inner::after {
  background-color: currentColor;
  content: "";
  flex-shrink: 0;
  height: 1.5em;
  width: 1px;
  margin-bottom: -0.1em;
}
.article-share__ttl-inner::before {
  margin-right: 0.3em;
  transform: rotate(-25deg);
}
.article-share__ttl-inner::after {
  transform: rotate(25deg);
}
.article-share__body {
  margin-top: 20px;
}
@media (max-width: 767px) {
  .article-share__body {
    margin-top: 15px;
  }
}
.article-share__lists {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
}
.article-share__item {
  border-radius: 15px;
  box-shadow: 0 0 16px rgba(0, 0, 0, 0.16);
  display: block;
  height: 60px;
  overflow: hidden;
  width: 60px;
}
@media (max-width: 767px) {
  .article-share__item {
    border-radius: 10px;
    height: 50px;
    width: 50px;
  }
}

.article-related {
  background-image: linear-gradient(0deg, #fff, #fff 45%, var(--base-color-2) 45%, var(--base-color-2));
  overflow: hidden;
  padding-top: 60px;
}
.article-related__slider .splide__track {
  overflow: visible;
}
@media (min-width: 768px) {
  .article-related__slider.is-initialized:not(.is-active) .splide__list {
    display: flex;
    gap: 30px;
    justify-content: center;
  }
}
.article-related__slider .splide__slide {
  display: flex;
}
@media (min-width: 768px) {
  .article-related__slider .splide__slide {
    flex: 1;
    max-width: 380px;
    width: 100%;
  }
}
@media (max-width: 767px) {
  .article-related__slider .splide__arrow--prev {
    right: 91%;
  }
}
@media (max-width: 767px) {
  .article-related__slider .splide__arrow--next {
    left: 91%;
  }
}
.article-related__slider .splide__pagination {
  padding-top: 40px;
}
@media (max-width: 767px) {
  .article-related__slider .splide__pagination {
    padding-top: 20px;
  }
}
.article-related__item {
  position: relative;
  z-index: 0;
}
.article-related__item-link {
  position: absolute;
  inset: 0;
  z-index: 1;
}
.article-related__item-img img {
  aspect-ratio: 450/254;
  border-radius: 10px;
  object-fit: cover;
  width: 100%;
}
@media (max-width: 767px) {
  .article-related__item-body {
    padding-inline: 10px;
  }
}
.article-related__item-info {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin-top: 15px;
}
.article-related__item-category {
  font-weight: var(--font-weight-base);
  position: relative;
  z-index: 2;
}
@media (max-width: 767px) {
  .article-related__item-category {
    font-size: 12px;
  }
}
.article-related__item-time {
  font-size: 13px;
}
@media (max-width: 767px) {
  .article-related__item-time {
    font-size: 12px;
  }
}
.article-related__item-ttl {
  font-size: 20px;
  font-weight: var(--font-weight-bold);
  line-height: 1.6;
  margin-top: 15px;
}
@media (max-width: 767px) {
  .article-related__item-ttl {
    font-size: 18px;
    margin-top: 10px;
  }
}
.article-related__item-ttl-inner {
  display: block;
  padding-right: 0.8em;
  position: relative;
}
.article-related__item-ttl-inner::before, .article-related__item-ttl-inner::after {
  background-color: var(--main-color);
  border-radius: 9999px;
  top: 0;
  bottom: 0;
  margin-block: auto;
  content: "";
  height: 1px;
  position: absolute;
  right: 0;
  transform-origin: calc(100% - 0.5px) 50%;
  width: 0.4em;
}
.article-related__item-ttl-inner::before {
  transform: rotate(45deg);
}
.article-related__item-ttl-inner::after {
  transform: rotate(-45deg);
}
.article-related__item-tags {
  margin-top: 15px;
  position: relative;
  z-index: 2;
}
@media (max-width: 767px) {
  .article-related__item-tags {
    margin-top: 10px;
  }
}
.article-related__item-tag {
  font-size: 12px;
}