.historyIntroduction {
    width: 100%;
    display: flex;
    flex-direction: column;
    margin-top: 80px;
    box-sizing: border-box;
}

.history-banner {
    width: 100%;
    height: 400px;
    overflow: hidden;
    position: relative;
    margin-bottom: 60px;
}

.history-banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.history-timeline {
    position: relative;
    width: 100%;
    padding: 60px 0;
    background: #f6fbfd;
    border-radius: 12px;
    margin-bottom: 30px;
    box-shadow: 0 2px 16px rgba(0,90,171,0.06);
}

.timeline-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    padding: 0 20px;
}

.timeline-axis {
    position: absolute;
    left: 50%;
    top: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, #b3d1f7 0%, #3578e5 50%, #b3d1f7 100%);
    transform: translateX(-50%);
    z-index: 1;
}

.timeline-nodes {
    position: relative;
    z-index: 2;
}

.timeline-node {
    display: flex;
    align-items: flex-start;
    margin: 80px 0;
    position: relative;
    width: 100%;
}

.timeline-node:nth-child(odd) {
    flex-direction: row;
}

.timeline-node:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-content {
    flex: 1;
    padding: 0 60px;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.timeline-node:nth-child(even) .timeline-content {
    align-items: flex-end;
}

.timeline-dot {
    width: 15px;
    height: 15px;
    background: #fff;
    border: 4px solid #c9cbda;
    border-radius: 50%;
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    z-index: 3;
    box-shadow: 0 2px 8px #b3c6e0;
    transition: all 0.3s ease;
}

.timeline-node.active .timeline-dot {
    border-color: #005aab;
    background: #eaf3fa;
    transform: translateX(-50%) scale(1.2);
    box-shadow: 0 4px 12px rgba(0,90,171,0.2);
}

.timeline-year {
    font-size: 24px;
    color: #3578e5;
    font-weight: bold;
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
    background: #fff;
    padding: 4px 16px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,90,171,0.08);
    transition: all 0.3s ease;
}

.timeline-node.active .timeline-year {
    color: #005aab;
    background: #eaf3fa;
    box-shadow: 0 4px 12px rgba(0,90,171,0.15);
    transform: translateY(-2px);
}

.timeline-node:nth-child(odd) .timeline-year {
    margin-left: auto;
}

.timeline-node:nth-child(even) .timeline-year {
    margin-right: auto;
}

.timeline-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(0,90,171,0.10);
    overflow: hidden;
    transition: all 0.3s ease;
    max-width: 480px;
    width: 100%;
    opacity: 0.8;
}

.timeline-node.active .timeline-card {
    opacity: 1;
    transform: translateY(-5px);
    box-shadow: 0 8px 32px rgba(0,90,171,0.15);
    border: 2px solid #eaf3fa;
}

.timeline-node:nth-child(odd) .timeline-card {
    margin-left: auto;
}

.timeline-node:nth-child(even) .timeline-card {
    margin-right: auto;
}

.timeline-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 32px rgba(0,90,171,0.15);
    opacity: 1;
}

.timeline-card img {
    width: 100%;
    height: 240px;
    object-fit: cover;
    transition: all 0.3s ease;
}

.timeline-node.active .timeline-card img {
    transform: scale(1.02);
}

.timeline-info {
    padding: 20px;
}

.timeline-title {
    font-size: 20px;
    color: #222;
    font-weight: bold;
    margin-bottom: 12px;
    transition: all 0.3s ease;
}

.timeline-node.active .timeline-title {
    color: #005aab;
}

.timeline-desc {
    font-size: 16px;
    color: #666;
    line-height: 1.6;
    transition: all 0.3s ease;
}

.timeline-node.active .timeline-desc {
    color: #444;
}

.history-title {
    font-size: 32px;
    color: #222;
    font-weight: bold;
    text-align: center;
    margin-bottom: 16px;
    position: relative;
    padding-bottom: 20px;
}

.history-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #3578e5, #b3d1f7);
    border-radius: 2px;
}

.history-desc {
    font-size: 18px;
    color: #666;
    text-align: center;
    margin-bottom: 40px;
    line-height: 1.6;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 20px;
}

@media screen and (max-width: 1200px) {
    .timeline-container {
        max-width: 960px;
    }
    
    .timeline-card {
        max-width: 420px;
    }
    
    .timeline-card img {
        height: 200px;
    }
    
    .history-title {
        font-size: 28px;
    }
    
    .history-desc {
        font-size: 16px;
        max-width: 700px;
    }
}

@media screen and (max-width: 900px) {
    .historyIntroduction {
        padding: 0 20px;
        margin-top: 60px;
    }
    
    .history-banner {
        margin-bottom: 40px;
    }
    
    .timeline-container {
        padding: 0 10px;
    }
    
    .timeline-node {
        margin: 60px 0;
    }
    
    .timeline-content {
        padding: 0 40px;
    }
    
    .timeline-card {
        max-width: 380px;
    }
    
    .timeline-year {
        font-size: 20px;
    }
    
    .timeline-card img {
        height: 180px;
    }
    
    .timeline-title {
        font-size: 18px;
    }
    
    .timeline-desc {
        font-size: 14px;
    }
    
    .history-timeline {
        padding: 40px 0;
    }
    
    .history-title {
        font-size: 24px;
        margin-bottom: 12px;
        padding-bottom: 16px;
    }
    
    .history-title::after {
        width: 50px;
        height: 2px;
    }
    
    .history-desc {
        font-size: 15px;
        margin-bottom: 30px;
        max-width: 600px;
    }
}

@media screen and (max-width: 600px) {
    .historyIntroduction {
        padding: 0;
        margin-top: 0px;
    }
    
    .history-banner {
        margin-bottom: 30px;
        margin-top: 50px;
    }
    
    .history-timeline {
        padding: 30px 0;
    }
    
    .timeline-node {
        margin: 40px 0;
        flex-direction: column !important;
    }
    
    .timeline-content {
        padding: 0 20px;
        margin-top: 20px;
        align-items: flex-start !important;
    }
    
    .timeline-dot {
        top: 0;
    }
    
    .timeline-year {
        font-size: 18px;
        margin-bottom: 12px;
    }
    
    .timeline-card {
        max-width: 100%;
    }
    
    .timeline-card img {
        height: 160px;
    }
    
    .timeline-info {
        padding: 15px;
    }
    
    .timeline-title {
        font-size: 16px;
        margin-bottom: 8px;
    }
    
    .timeline-desc {
        font-size: 14px;
        line-height: 1.5;
    }
    
    .history-title {
        font-size: 20px;
        margin-bottom: 10px;
        padding-bottom: 12px;
    }
    
    .history-title::after {
        width: 40px;
        height: 2px;
    }
    
    .history-desc {
        font-size: 14px;
        margin-bottom: 20px;
        padding: 0 15px;
    }
}
@media (max-width: 400px) {
    .history-banner{
        height: 200px;
        margin-bottom: 10px;
        margin-top: 50px;
      }
}