.mindmap-timeline-37f4e85e {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px 0;
}

.mindmap-timeline-37f4e85e::after {
    content: '';
    position: absolute;
    width: 4px;
    background-color: #ddd;
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -2px;
}

.mindmap-item-37f4e85e {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.6s ease-out;
}

.mindmap-item-37f4e85e.in-view {
    opacity: 1;
    transform: translateY(0);
}

.mindmap-item-37f4e85e.left {
    left: 0;
}

.mindmap-item-37f4e85e.right {
    left: 50%;
}

.mindmap-item-37f4e85e::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    right: -10px;
    background-color: white;
    border: 4px solid #333;
    top: 15px;
    border-radius: 50%;
    z-index: 1;
}

.mindmap-item-37f4e85e.right::after {
    left: -10px;
}

.mindmap-content-37f4e85e {
    padding: 20px;
    background: #f9f9f9;
    border-radius: 6px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    position: relative;
}

.mindmap-year-37f4e85e {
    font-size: 1.2rem;
    font-weight: bold;
    color: #4a90e2;
    margin-bottom: 5px;
}

.mindmap-title-37f4e85e {
    margin: 0 0 10px 0;
    font-size: 1.5rem;
}

.mindmap-desc-37f4e85e {
    font-size: 1rem;
    color: #555;
    line-height: 1.5;
}

@media screen and (max-width: 768px) {
    .mindmap-timeline-37f4e85e::after {
        left: 31px;
    }
    
    .mindmap-item-37f4e85e {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }
    
    .mindmap-item-37f4e85e.right {
        left: 0%;
    }
    
    .mindmap-item-37f4e85e.left::after, 
    .mindmap-item-37f4e85e.right::after {
        left: 21px;
    }
}