@charset "utf-8";

.about_history {
  box-sizing: border-box;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 32px;
}
.about_history_title {
  margin-bottom: 24px;
  font-size: 24px;
  font-weight: 600;
  opacity: 0;
  animation: showUp 1.2s cubic-bezier(0.21, 0.42, 0.23, 1) forwards 0.4s;
}
.about_history_item {
  display: flex;
  opacity: 0;
  animation: showUp 1.2s cubic-bezier(0.21, 0.42, 0.23, 1) forwards 0.4s;
}
.about_history_item_year {
  flex-shrink: 0;
  width: 128px;
  margin-right: 24px;
  padding-top: 24px;
  background-color: #0e1a25;
  color: #fff;
  font-size: 24px;
  font-weight: 600;
  text-align: center;
}
.about_history_item_list {
  flex: 1;
}
.about_history_item_list_item {
  display: flex;
  padding: 24px 0;
  border-top: 1px solid #eef3f7;
}
.about_history_item_list_item_month {
  margin-right: 40px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
}
.about_history_item_list_item_text {
  font-size: 16px;
  line-height: 1.6;
}
.about_history_item_separation {
  width: 4px;
  height: 24px;
  margin-left: 62px;
  background-color: #0e1a25;
  opacity: 0;
  animation: showUp 1.2s cubic-bezier(0.21, 0.42, 0.23, 1) forwards 0.4s;
}

@media screen and (max-width: 640px) {
  .about_history {
    padding: 40px 20px;
  }
  .about_history_item_year {
    width: 100px;
    font-size: 20px;
  }
  .about_history_item_separation {
    margin-left: 52px;
  }
}

@media screen and (max-width: 480px) {
  .about_history_title {
    font-size: 20px;
  }
  .about_history_item_year {
    width: 64px;
    margin-right: 16px;
    font-size: 16px;
  }
  .about_history_item_list_item {
    padding: 16px 0;
  }
  .about_history_item_list_item_month {
    margin-right: 20px;
    font-size: 14px;
  }
  .about_history_item_list_item_text {
    font-size: 14px;
  }
  .about_history_item_separation {
    margin-left: 32px;
  }
}

@media screen and (max-width: 370px) {
  .about_history_item_list_item_month {
    font-size: 13px;
  }
  .about_history_item_list_item_text {
    font-size: 13px;
  }
}