/* 歴史ページ固有のスタイル */
.timeline {
  border-left: 3.5px solid;
  border-image: linear-gradient(180deg, #4097eb 20%, #90d4fd 100%) 1;
  margin-left: 16px;
  padding-left: 28px;
  position: relative;
}

.event {
  margin-bottom: 24px;
  position: relative;
  padding: 15px;
  background: linear-gradient(90deg, #f3f8ff 80%, #e1efff 100%);
  border-radius: 8px;
  box-shadow: 0 2px 11px rgba(64,151,235,0.05);
}
.event::before {
  content: '';
  position: absolute;
  left: -43px;
  top: 22px;
  width: 22px;
  height: 22px;
  background: linear-gradient(120deg, #4097eb 50%, #a9e2fc 100%);
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: 0 1px 6px rgba(64,151,235,0.2);
}

.event h3 {
  margin: 0 0 4px 0;
  font-size: 1.17rem;
  color: #246bd2;
}

.event p {
  margin: 0;
  color: #476;
  font-size: 1.01rem;
}

.gallery {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: flex-start;
  margin-bottom: 18px;
}

.gallery img {
  border: 3px solid #c6e7ff;
  border-radius: 11px;
  box-shadow: 0 2px 11px rgba(64,151,235,0.11);
  width: 202px;
  height: 134px;
  object-fit: cover;
  transition: transform 0.22s, box-shadow 0.22s;
}

.gallery img:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 15px rgba(64,151,235,0.2);
}

.summary {
  background: linear-gradient(93deg, #e7f5ff 88%, #d4eaff 100%);
  border: 2px solid #b3daff;
  border-radius: 12px;
  padding: 22px 26px;
  font-size: 1.1rem;
  color: #2b5688;
  box-shadow: 0 2px 12px rgba(64,151,235,0.06);
}