.timeline-container {
    position: relative;
    padding: 300px 60px;
    display: flex;
    overflow-x: auto;
    white-space: nowrap;
    background: #f9f9f9;
    scroll-snap-type: x mandatory;
}

.timeline-line {
    position: absolute;
    top: 50%;
    left: 0;
    width: 135%;
    height: 4px;
    background: #ccc;
    z-index: 0;
}

.timeline-item {
    position: relative;
    min-width: 220px;
    scroll-snap-align: center;
}

.timeline-item .dot {
    width: 14px;
    height: 14px;
    background: #333;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
}

.timeline-item .content {
    position: absolute;
    width: 200px;
    background: white;
    border: 1px solid #ddd;
    padding: 16px;
    border-radius: 10px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    text-align: center;
}

.timeline-item.top .content {
    bottom: 60px;
}

.timeline-item.bottom .content {
    top: 60px;
}

.year {
    font-weight: bold;
    font-size: 18px;
    margin-bottom: 6px;
}

.desc {
    font-size: 14px;
    color: #666;
}