.flx-subnav{max-width: 96%;}

    .year {
      width: 13%;
      padding-top: 30px;
      box-sizing: border-box;
      border-right: 10px solid #bbbbbb;
      display: flex;
      flex-direction: column;
      text-align: center;
      padding-right: 5px;
      font-weight: bold;
    }

    .event {
      width: 63%;
      padding: 20px;
      margin-top: 10px;
      margin-left: 50px;
      margin-right: 70px;
      box-sizing: border-box;
    }

    .image_area_2 {
      width: 20%;
      margin-top: 20px;
      padding: 10px;
      transition: transform 0.3s ease-in-out; /* アニメーションの速さとタイミングを設定 */
    }

    .image_area_2:hover {
      transform: scale(1.1); /* ホバー時の拡大表示 */
    }

    .iamge_area_2 img {
      max-width: 100%;
      padding: 20px;
      height: auto;
      margin-top: 40px;
      margin-bottom: 30px;
      margin-right: 20px;
/*      filter: grayscale(70%);
      transition: filter 0.5s ease; /* フィルターのアニメーションを追加 */
    }

    .image_area {
    width:100%;
    margin-top: 20px;
    display: flex;
    gap: 10px;
    justify-content: flex-end; /* 右寄せにする */
}

.image_area_sub {
    width: 15%;
    transition: transform 0.3s ease-in-out; /* アニメーションの速さとタイミングを設定 */
}

.image_area_sub:hover {
  transform: scale(1.1); /* ホバー時の拡大表示 */
}

.image_area_sub img {
    width: 100%;
    height: auto;
}

    button {
      background-color: #bbbbbb;
      margin-left: 2rem;
      margin-top: 30px;
    }
    button a {
      color: #ffffff;
      font-size: 12px;
      padding: 2px;
    }

  button a:-webkit-any-link {
    color: #000000;
    text-decoration: none;
    font-size: 16px;
    font-weight: bold;
    padding: 20px;
  }

  .history_container {
    width: 80%;
    margin-bottom: 250px;
  }
  .wa_world {
    margin-bottom: 50px;
  }

@media only screen and (max-width: 1001px) {
  .history_container {
    display: block;
    width: 100%;
    padding: 0 20px;
  }
  .timeline {
    margin: 30px auto;
  }
  .year {
      width: 14%;
      padding-top: 30px;
      box-sizing: border-box;
      border-right: 5px double #bbbbbb;
      display: flex;
      flex-direction: column;
      text-align: center;
      padding-right: 5px;
      font-size: 12px;
    }

    .event {
      width: 86%;
      padding: 30px 5px 0 10px;
      margin-top: 0px;
      margin-left: 0px;
      margin-right: 0px;
      box-sizing: border-box;
    }

    button {
      background-color: #bbbbbb;
      margin-left: 1rem;
      margin-top: 30px;
    }
    button a:-webkit-any-link {
      color: #000000;
      text-decoration: none;
      font-size: 12px;
      font-weight: bold;
      padding: 10px;
    }
    .image_area {
    width:100%;
    margin-top: 20px;
    display: flex;
    gap: 10px;
    justify-content: flex-end; /* 右寄せにする */
}

.image_area_sub {
    width: 20%;
    transition: transform 0.3s ease-in-out; /* アニメーションの速さとタイミングを設定 */
}

.image_area_sub:hover {
  transform: scale(1.1); /* ホバー時の拡大表示 */
}

.image_area_sub img {
    width: 100%;
    height: auto;
}

}

.lists_a {
  margin: 10px 0 0 1rem;
}

.lists_b i {
  margin: 30px 5px 0 1rem;
}

.introduction {
  margin-bottom: 60px;
  margin-top: 20px;
  background-color: rgba(255, 255, 255, 0.6); /* 白色の半透明 */
}
.intro_desc {
  margin-left: 30px;
}
.blk-subnav {
  padding: 0;
}
.intro_text {
  padding: 20px;
}