/* AI進化のタイムラインセクション */
.ai-evolution {
    background-color: var(--bg-light);
    padding: 80px 0;
}

.ai-evolution-timeline {
    display: flex;
    justify-content: space-between;
    margin: 60px 0;
    position: relative;
}

.ai-evolution-timeline::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary), var(--primary-dark));
    z-index: 0;
}

.timeline-item {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    padding: 25px;
    text-align: center;
    width: 22%;
    position: relative;
    z-index: 1;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.timeline-icon {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    border-radius: 50%;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    height: 70px;
    width: 70px;
    margin: 0 auto 15px;
}

.timeline-item h4 {
    color: var(--primary);
    font-size: 20px;
    margin-bottom: 10px;
}

.timeline-item p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

.multi-agent {
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    padding: 40px;
    text-align: center;
}

.multi-agent h3 {
    color: var(--primary);
    font-size: 24px;
    margin-bottom: 20px;
}

.multi-agent p {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 30px;
}

.multi-agent-image {
    margin: 20px auto;
    max-width: 800px;
}

.multi-agent-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

/* レスポンシブスタイル */
@media (max-width: 992px) {
    .ai-evolution-timeline {
        flex-direction: column;
        align-items: center;
    }
    
    .ai-evolution-timeline::before {
        top: 0;
        bottom: 0;
        left: 50%;
        width: 2px;
        height: 100%;
    }
    
    .timeline-item {
        width: 80%;
        margin-bottom: 30px;
    }
    
    .multi-agent {
        padding: 30px 20px;
    }
}

@media (max-width: 768px) {
    .timeline-item {
        width: 90%;
    }
}