/* 时间线 */
#gallery-timeline {
  padding: 0 2px;
  text-align: left;
}

.month-group {
  margin-bottom: 32px;
  position: relative;
  content-visibility: auto;
  contain-intrinsic-size: auto 500px;
}

.month-group.is-detached {
  content-visibility: visible;
}

.month-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 8px 0 14px;
  position: relative;
  padding-left: 12px;
  letter-spacing: 0.04em;
  border-left: 3px solid var(--primary-light);
  line-height: 1.4;
}

.month-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
  gap: 10px;
  margin-top: 0;
}

/* 照片卡片 — 白底轻阴影，照片优先 */
.item {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
  position: relative;
  border: 1px solid var(--card-border);
  contain: layout style paint;
}

.item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.item:active {
  transform: scale(0.98);
}

.video-indicator {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(74, 64, 88, 0.55);
  color: white;
  border-radius: 50%;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  z-index: 2;
  pointer-events: none;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.item img,
.item .video-thumb {
  width: 100%;
  height: 148px;
  object-fit: cover;
  display: block;
  background: var(--bg-muted);
  contain: layout style;
}

.item .video-thumb {
  background: #2a2430;
}

/* 信息区 — 轻、短、次级 */
.item > .footer {
  padding: 8px 10px 10px;
  text-align: left;
  background: var(--bg-elevated);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  align-items: center;
}

.tags-meta {
  margin-top: 5px;
}

.tag {
  display: inline-block;
  background: var(--bg-muted);
  color: var(--text-secondary);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  font-size: 0.65rem;
  white-space: nowrap;
  font-weight: 500;
  border: none;
  line-height: 1.5;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tag-muted {
  background: transparent;
  color: var(--text-tertiary);
  padding-left: 0;
  padding-right: 4px;
}

.upload-date-tag {
  background: var(--primary-soft) !important;
  color: var(--primary-dark) !important;
}

.age-tag {
  background: rgba(168, 201, 181, 0.22) !important;
  color: #5A8F72 !important;
}

/* 可点击标签 */
button.tag {
  font: inherit;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

.tag-clickable:hover {
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.item img.img-broken {
  object-fit: contain;
  background:
    linear-gradient(135deg, var(--bg-muted) 0%, #ebe4df 100%);
  position: relative;
}

.item img.img-broken::after {
  content: '无法加载';
}