/* 图片宫格布局 - image-grid 插件 */

.image-grid {
  display: grid;
  gap: 4px;
  margin: 12px 0;
  border-radius: 12px;
  overflow: hidden;
  width: 100%;
}

.image-grid .image-grid__item {
  position: relative;
  overflow: hidden;
  background: hsl(var(--muted));
  cursor: zoom-in;
}

.image-grid .image-grid__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
  margin: 0 !important;
}

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

/* 1 张图：保持原图比例，限制最大高度 */
.image-grid--1 {
  display: block;
  border-radius: 12px;
}

.image-grid--1 .image-grid__item {
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
}

.image-grid--1 .image-grid__item img {
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 560px;
  object-fit: contain;
  border-radius: 12px;
}

/* 2 张图：横向并排 */
.image-grid--2 {
  grid-template-columns: 1fr 1fr;
  aspect-ratio: 2 / 1;
}

/* 3 张图：左大右两小 */
.image-grid--3 {
  grid-template-columns: 2fr 1fr;
  grid-template-rows: 1fr 1fr;
  aspect-ratio: 3 / 2;
}

.image-grid--3 .image-grid__item:nth-child(1) {
  grid-row: 1 / 3;
}

/* 4 张图：2x2 */
.image-grid--4 {
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  aspect-ratio: 1 / 1;
}

/* 5 张图：上 2 + 下 3 */
.image-grid--5 {
  grid-template-columns: repeat(6, 1fr);
  grid-template-rows: 1fr 1fr;
  aspect-ratio: 3 / 2;
}

.image-grid--5 .image-grid__item:nth-child(1),
.image-grid--5 .image-grid__item:nth-child(2) {
  grid-column: span 3;
}

.image-grid--5 .image-grid__item:nth-child(3),
.image-grid--5 .image-grid__item:nth-child(4),
.image-grid--5 .image-grid__item:nth-child(5) {
  grid-column: span 2;
}

/* 6 张图：3x2 */
.image-grid--6 {
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: 1fr 1fr;
  aspect-ratio: 3 / 2;
}

/* 7 张图：上 3 + 下 4 */
.image-grid--7 {
  grid-template-columns: repeat(12, 1fr);
  grid-template-rows: 1fr 1fr;
  aspect-ratio: 12 / 7;
}

.image-grid--7 .image-grid__item:nth-child(-n + 3) {
  grid-column: span 4;
}

.image-grid--7 .image-grid__item:nth-child(n + 4) {
  grid-column: span 3;
}

/* 8 张图：上 3 + 下 5 */
.image-grid--8 {
  grid-template-columns: repeat(15, 1fr);
  grid-template-rows: 1fr 1fr;
  aspect-ratio: 5 / 3;
}

.image-grid--8 .image-grid__item:nth-child(-n + 3) {
  grid-column: span 5;
}

.image-grid--8 .image-grid__item:nth-child(n + 4) {
  grid-column: span 3;
}

/* 9 张图：3x3 九宫格 */
.image-grid--9 {
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  aspect-ratio: 1 / 1;
}

/* 10 张及以上：通用多图网格，每个 cell 保持 1:1 */
.image-grid--many {
  grid-auto-rows: 1fr;
}

.image-grid--many .image-grid__item {
  aspect-ratio: 1 / 1;
}

.image-grid--cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.image-grid--cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

.image-grid--cols-5 {
  grid-template-columns: repeat(5, 1fr);
}

/* 移动端适配：减小间距，多列网格降级到 3 列 */
@media (max-width: 640px) {
  .image-grid {
    gap: 2px;
    border-radius: 8px;
  }
  .image-grid--1 .image-grid__item img {
    max-height: 420px;
    border-radius: 8px;
  }
  .image-grid--cols-4,
  .image-grid--cols-5 {
    grid-template-columns: repeat(3, 1fr);
  }
}