.group-site-link {
  background-color: #f5f5f5;
  padding: 40px 0;
  margin-top: 40px;
}

.group-site-link__inner {
  width: 980px;
  margin: 0 auto;
  overflow: hidden;
  padding: 0;
  background: #f5f5f5;
  position: relative;
}

@media screen and (min-width: 768px) {
  .group-site-link__inner {
    overflow: initial;
  }
}

.group-site-link__container {
  width: 96%;
  max-width: 940px;
  margin: 0 auto;
  overflow: hidden;
  padding: 20px;
}

.group-site-link__title {
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 30px;
  text-align: center;
  color: #333;
}

.group-site-link__categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 10px;
}

.group-site-link__category {
  background-color: #fff;
  padding: 20px;
  border: 1px solid #ddd;
}

.group-site-link__heading {
  font-size: 16px;
  font-weight: bold;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 1px solid #ddd;
  color: #333;
  line-height: 1.4;
}

.group-site-link__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.group-site-link__item {
  margin-bottom: 10px;
}

.group-site-link__item:last-child {
  margin-bottom: 0;
}

.group-site-link__link {
  color: #06c;
  text-decoration: none;
  font-size: 14px;
  display: inline-block;
  line-height: 1.4;
}

.group-site-link__link:hover {
  text-decoration: underline;
  color: #04a;
}

/* レスポンシブ対応 */
@media screen and (max-width: 768px) {
  .group-site-link {
    padding: 30px 0;
    margin-top: 30px;
  }
  
  .group-site-link__inner {
    width: 100%;
    padding: 0;
  }
  
  .group-site-link__container {
    width: calc(100% - 30px);
    padding: 0 15px;
  }
  
  .group-site-link__title {
    font-size: 20px;
    margin-bottom: 20px;
  }
  
  .group-site-link__categories {
    grid-template-columns: 1fr;
  }
  
  .group-site-link__category {
    padding: 15px;
  }
  
  .group-site-link__heading {
    font-size: 14px;
  }
  
  .group-site-link__link {
    font-size: 13px;
  }
}