.portfolio-grid {
  margin-top: 1.5em;
  display: flex;
  flex-direction: column;
  gap: 2.5em;
}

.portfolio-item {
  display: flex;
  align-items: flex-start;
  gap: 1.5em;
  padding-bottom: 1.5em;
  border-bottom: 1px solid #e0e0e0;
  transition: box-shadow 0.3s;
}

.portfolio-item:last-child {
  border-bottom: none;
}

.portfolio-image-link {
  display: block;
  flex-shrink: 0;
}

.portfolio-image-wrapper {
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  transition: transform 0.3s, box-shadow 0.3s;
}

/* cover: 让图片填满容器，但可能会裁剪内容 */
/* .portfolio-image {
  display: block;
  width: 220px;
  height: 132px;
  object-fit: cover;
  transition: transform 0.3s, filter 0.3s;
} */

/* contain: 让图片完整显示，但可能会有空白变 */
.portfolio-image {
  display: block;
  width: 270px;
  height: auto;
  max-height: 182px;
  object-fit: contain;
  background: #ffffff;
  transition: transform 0.3s, filter 0.3s;
}

/* 让图片自适应高度，宽度自动（适合横图） */
/* .portfolio-image {
  display: block;
  height: 132px;
  width: auto;
  max-width: 220px;
  object-fit: contain;
  background: #ffffff;
} */

/* 让图片自适应宽度，高度自动（适合竖图） */
/* .portfolio-image {
  display: block;
  width: 220px;
  height: auto;
  max-height: 132px;
  object-fit: contain;
  background: #ffffff;
} */

.portfolio-image-link:hover .portfolio-image-wrapper,
.portfolio-image-link:focus .portfolio-image-wrapper {
  transform: translateY(-6px) scale(1.04);
  box-shadow: 0 8px 24px rgba(52,152,219,0.18);
}

.portfolio-image-link:hover .portfolio-image,
.portfolio-image-link:focus .portfolio-image {
  filter: brightness(1.08) saturate(1.2);
}

.portfolio-info {
  flex: 1;
}

.portfolio-title {
  margin-bottom: 0.5em;
  font-size: 1.3em;
  font-weight: 600;
  line-height: 1.3;
}

.portfolio-title a {
  text-decoration: none;
  color: #2c3e50;
  transition: color 0.3s ease;
}

.portfolio-title a:hover {
  color: #3498db;
}

.portfolio-excerpt {
  color: #555;
  margin-bottom: 0.5em;
  line-height: 1.6;
  font-size: 0.95em;
}

.portfolio-date {
  color: #888;
  font-size: 0.85em;
  margin: 0;
  font-style: italic;
}

@media (max-width: 900px) {
  .portfolio-item {
    flex-direction: column;
    align-items: stretch;
  }
  .portfolio-image {
    width: 100%;
    height: auto;
    max-width: 100%;
  }
}

/* 详情页多图展示区 */
.portfolio-detail-images {
  display: flex;
  gap: 1.5em;
  margin-bottom: 2em;
  flex-wrap: wrap;
}
.portfolio-detail-image {
  width: 320px;
  height: 192px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  transition: transform 0.3s, box-shadow 0.3s;
  margin-bottom: 1em;
}
.portfolio-detail-image:hover {
  transform: scale(1.05) translateY(-4px);
  box-shadow: 0 8px 24px rgba(52,152,219,0.18);
  z-index: 2;
}
.portfolio-detail-image-caption {
  font-size: 0.85rem;
  padding: 0 2rem 1rem 2rem;
  font-style: italic;
  text-align: center;
}
@media (max-width: 900px) {
  .portfolio-detail-image {
    width: 100%;
    height: auto;
    max-width: 100%;
  }
  .portfolio-detail-images {
    flex-direction: column;
    gap: 1em;
  }
}