.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.gallery-grid img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
  transition: transform 0.3s;
}

.gallery-grid img:hover {
  transform: scale(1.03);
}

.site-main.container {
  padding: 2rem 1.5rem; /* 上下2rem 左右1.5rem */
}