/* 会社紹介ページ用スタイル */
.timeline {
    position: relative;
    padding: 20px 0;
}

.timeline:before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 15px;
    width: 4px;
    background: #e9ecef;
}

.timeline-item {
    position: relative;
    margin-bottom: 30px;
}

.timeline-badge {
    position: absolute;
    left: 0;
    width: 44px;
    height: 44px;
    line-height: 44px;
    text-align: center;
    color: white;
    border-radius: 50%;
    margin-left: -20px;
    z-index: 1;
    font-size: 0.85rem;
    font-weight: bold;
}

.timeline-content {
    margin-left: 40px;
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: 4px;
}

.timeline-content h4 {
    margin-top: 0;
}

/* アニメーション用クラス */
.animate__animated {
    animation-duration: 1s;
    animation-fill-mode: both;
}

.animate__fadeIn {
    animation-name: fadeIn;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@media (min-width: 768px) {
    .timeline:before {
        left: 50%;
        margin-left: -2px;
    }
    
    .timeline-item {
        margin-bottom: 50px;
    }
    
    .timeline-badge {
        left: 50%;
        margin-left: -22px;
    }
    
    .timeline-content {
        width: 45%;
    }
    
    .timeline-item:nth-child(odd) .timeline-content {
        float: left;
        margin-left: 0;
    }
    
    .timeline-item:nth-child(even) .timeline-content {
        float: right;
        margin-left: 0;
    }
    
    .timeline-item:after {
        content: '';
        display: block;
        clear: both;
    }
}