.photo-title-top {
  font-size: 32px;
  font-weight: bold;
  letter-spacing: 4px;
  margin: 100px auto 40px auto;
  text-align: center;
  font-family: "Microsoft YaHei", "黑体", "Arial", sans-serif;
}

.photo-main {
  width: 1100px;
  margin: 100px auto 0 auto; /* 顶部留出导航高度 */
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.photo-item a {
  display: block;
}

.photo-item img {
  width: 100%;
  aspect-ratio: 1/1;
  object-fit: cover;
  border-radius: 14px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  background: #fff;
  display: block;
  transition: transform 0.2s;
  cursor: pointer;
}

.photo-item img:hover {
  transform: scale(1.04);
}

.photo-main img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  background: #fff;
  padding: 0;
}