body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Noto Sans", sans-serif;
  background-color: #f9f9f9;
  color: #333;
  max-width: 800px;
  margin: 0 auto;
  padding: 16px;
}
h1 {
  text-align: center;
  font-size: 28px;
  color: #444;
}
.category-card, .photo-entry {
  background: #fff;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 20px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
  transition: transform 0.2s;
}
.category-card:hover {
  transform: scale(1.02);
}
.category-card img, .photo-entry img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  margin-bottom: 10px;
}
.category-card-title {
  font-size: 18px;
  color: #333;
  margin-bottom: 6px;
}
.category-card-desc {
  font-size: 14px;
  color: #777;
}
.description {
  font-size: 14px;
  color: #666;
  margin-bottom: 6px;
}
.metadata {
  font-size: 12px;
  color: #999;
}

.categories-container {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: space-between;
}

.category-card {
  width: calc(50% - 10px); /* 每行两个 */
  box-sizing: border-box;
}