/* timeline.css — R98 时间轴样式 */
.timeline-container { padding: var(--spacing-md); }

.timeline-year-group { margin-bottom: var(--spacing-lg); }
.timeline-year-label {
  font-size: 22px; font-weight: 800; color: var(--color-primary);
  margin-bottom: var(--spacing-md); padding-left: 8px;
  border-left: 4px solid var(--color-accent);
}

.timeline-track {
  position: relative; padding-left: 28px;
}
.timeline-track::before {
  content: ''; position: absolute; left: 10px; top: 0; bottom: 0;
  width: 3px; background: var(--color-timeline-line); border-radius: 2px;
}

.timeline-card {
  position: relative; margin-bottom: var(--spacing-md); cursor: pointer;
  transition: transform 0.2s ease;
}
.timeline-card:hover { transform: translateX(4px); }
.timeline-card__dot {
  position: absolute; left: -22px; top: 18px; width: 14px; height: 14px;
  border-radius: 50%; background: var(--dot-color, var(--color-timeline-dot));
  border: 3px solid var(--color-bg); box-shadow: 0 0 0 2px var(--dot-color, var(--color-timeline-dot));
  z-index: 1;
}
.timeline-card--milestone .timeline-card__body {
  border: 2px solid var(--color-milestone-border);
  box-shadow: 0 0 0 4px rgba(255,215,0,0.15);
}
.timeline-card--milestone .timeline-card__dot {
  width: 18px; height: 18px; left: -24px;
  animation: milestonePulse 2s ease-in-out infinite;
}

.timeline-card__body {
  background: var(--color-card-bg); border-radius: var(--radius-md);
  padding: var(--spacing-md); box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}
.timeline-card__header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 8px; font-size: 13px;
}
.timeline-card__type { color: var(--color-text-secondary); }
.timeline-card__date { color: var(--color-primary); font-weight: 600; }
.timeline-card__title { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.timeline-card__content { font-size: 14px; color: var(--color-text-secondary); margin-bottom: 8px; }
.timeline-card__photo {
  width: 100%; max-height: 180px; object-fit: cover; border-radius: var(--radius-sm); margin-bottom: 8px;
}
.timeline-card__members { font-size: 13px; color: var(--color-text-secondary); }

@keyframes milestonePulse {
  0%, 100% { box-shadow: 0 0 0 2px var(--dot-color), 0 0 0 4px rgba(255,215,0,0.3); }
  50% { box-shadow: 0 0 0 2px var(--dot-color), 0 0 0 8px rgba(255,215,0,0.1); }
}