/* 发展历程页面样式 */
.timeline-container {
    position: relative;
    padding: 40px 0;
    max-width: 1000px;
    margin: 0 auto;
}

.timeline-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 160px;
    width: 4px;
    background-color: #1c3a5e;
}

.timeline-item {
    position: relative;
    display: flex;
    margin-bottom: 50px;
}

.timeline-year {
    width: 160px;
    text-align: right;
    padding-right: 30px;
    flex-shrink: 0;
}

.timeline-year span {
    display: inline-block;
    background-color: #1c3a5e;
    color: #fff;
    font-size: 20px;
    font-weight: bold;
    padding: 8px 15px;
    border-radius: 5px;
}

.timeline-content {
    position: relative;
    flex: 1;
    padding-left: 30px;
}

.timeline-dot {
    position: absolute;
    top: 10px;
    left: -8px;
    width: 20px;
    height: 20px;
    background-color: #fff;
    border: 4px solid #1c3a5e;
    border-radius: 50%;
    z-index: 1;
}

.timeline-card {
    background-color: #f9f9f9;
    border-radius: 8px;
    padding: 25px 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin-left: 20px;
    position: relative;
    transition: all 0.3s ease;
}

.timeline-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.timeline-card:before {
    content: '';
    position: absolute;
    left: -10px;
    top: 15px;
    width: 0;
    height: 0;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    border-right: 10px solid #f9f9f9;
}

.timeline-card h3 {
    font-size: 20px;
    color: #1c3a5e;
    margin-bottom: 15px;
    font-weight: bold;
}

.timeline-card p {
    font-size: 16px;
    line-height: 1.7;
    color: #666;
}

/* 响应式设计 */
@media screen and (max-width: 900px) {
    .timeline-line {
        left: 30px;
    }
    
    .timeline-item {
        flex-direction: column;
    }
    
    .timeline-year {
        width: 100%;
        text-align: left;
        padding-right: 0;
        padding-left: 60px;
        margin-bottom: 15px;
    }
    
    .timeline-content {
        padding-left: 60px;
    }
    
    .timeline-dot {
        left: 22px;
    }
    
    .timeline-card {
        margin-left: 0;
    }
    
    .timeline-card:before {
        display: none;
    }
    
    .timeline-card h3 {
        font-size: 18px;
    }
    
    .timeline-card p {
        font-size: 14px;
    }
}