/* ============================================
   Timeline Page 样式 (timeline.css)
   ============================================ */

.timeline-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px 56px;
}

.timeline-group {
    margin-bottom: 48px;
}

.timeline-year {
    font-size: 28px;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 24px;
    position: relative;
    padding-left: 16px;
}

.timeline-year::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 24px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: 2px;
}

.timeline-items {
    position: relative;
    padding-left: 28px;
    border-left: 2px solid var(--color-border);
}

.timeline-items::before {
    content: '';
    position: absolute;
    left: -1px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-primary), transparent);
}

.tl-item {
    position: relative;
    padding-left: 24px;
    padding-bottom: 32px;
}

.tl-dot {
    position: absolute;
    left: -35px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-surface);
    border: 3px solid var(--color-primary);
    box-shadow: 0 0 0 4px var(--color-primary-light);
    transition: all var(--transition);
}

.tl-item:hover .tl-dot {
    background: var(--color-primary);
    transform: scale(1.15);
}

.tl-content {
    position: relative;
}

.tl-date {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 6px;
}

.tl-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 6px;
    cursor: pointer;
    transition: color var(--transition);
}

.tl-title:hover {
    color: var(--color-primary);
}

.tl-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.tl-tags {
    display: flex;
    gap: 6px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.tl-tag {
    padding: 3px 10px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    background: var(--color-bg-alt);
    color: var(--color-text-muted);
}