/* custom properties */
:root {
  --color-primary: #009b94;
  --color-secondary: #004097;
  --color-link: #193342;
  --color-hover: #009b94;
  --color-white: #fff;
  --color-black: #000;
  --color-gray: #666;
  --color-lightgray: #999;
  --color-lightgray2: #ccc;
  --color-lightgray3: #e4e4e4;
  --color-maintext: #193342;
  --color-subtext: #333;
  --color-bg01: #F3F7FA;
  --color-bg02: #e4f2f2;
  --color-bg03: #BDE5E3;
  --color-bg04: #e8fffe;
  --font-family-sans-serif: YakuHanJPs, Arial, "Helvetica Neue", "Noto Sans JP", sans-serif;
  --font-family-font-awesome: "Font Awesome 5 Free"; }

.topics_list {
  border-bottom: 1px solid var(--color-lightgray3); }
  .topics_list > li {
    display: flex;
    padding: 1.5rem 1rem;
    border-top: 1px solid var(--color-lightgray3); }
    @media screen and (max-width: 767px) {
      .topics_list > li {
        display: block; } }
    .topics_list > li .topics_date {
      width: 8em;
      font-size: 1.6rem; }
      @media screen and (max-width: 767px) {
        .topics_list > li .topics_date {
          width: 100%; } }
    .topics_list > li .topics_title {
      width: calc(100% - 8em);
      font-size: 1.6rem;
      font-weight: 600; }
      @media screen and (max-width: 767px) {
        .topics_list > li .topics_title {
          width: 100%; } }

.block_topics {
  max-width: 74rem;
  margin: auto; }
  .block_topics .topics_date {
    text-align: right; }
  .block_topics .dl_01 {
    display: flex;
    flex-wrap: wrap;
    margin: 2rem 0; }
    @media screen and (max-width: 767px) {
      .block_topics .dl_01 {
        display: block; } }
    .block_topics .dl_01 dt {
      width: 8em;
      font-weight: 700; }
      @media screen and (max-width: 767px) {
        .block_topics .dl_01 dt {
          width: 100%; } }
    .block_topics .dl_01 dd {
      width: calc(100% - 8em); }
      @media screen and (max-width: 767px) {
        .block_topics .dl_01 dd {
          width: 100%; } }
  .block_topics .topics_main_img {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
    margin: 2rem 0; }
    @media screen and (max-width: 767px) {
      .block_topics .topics_main_img {
        display: block; } }
    .block_topics .topics_main_img > li {
      width: calc((100% - 2rem) / 2); }
      @media screen and (max-width: 767px) {
        .block_topics .topics_main_img > li {
          width: 100%; } }
  .block_topics .topics_img_list {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin: 2rem 0; }
    .block_topics .topics_img_list > li {
      width: calc((100% - 6rem) / 4); }
      @media screen and (max-width: 767px) {
        .block_topics .topics_img_list > li {
          width: calc((100% - 2rem) / 2); } }
      .block_topics .topics_img_list > li img {
        border: 1px solid var(--color-lightgray2); }
  .block_topics .topics_detail {
    margin: 4rem 0; }
    .block_topics .topics_detail .topics_detail_title {
      margin-bottom: 2rem;
      font-size: clamp(2rem, 1.927rem + 0.36vw, 2.2rem);
      font-weight: 700; }
    .block_topics .topics_detail .topics_detail_2nd_title {
      margin-bottom: 2rem;
      font-weight: 700; }
  .block_topics .link_btn {
    text-align: center;
    border-top: 1px solid #C0CDD7; }
    .block_topics .link_btn a {
      min-width: 20rem;
      margin-top: 5rem; }
      @media screen and (max-width: 767px) {
        .block_topics .link_btn a {
          margin-top: 3rem; } }