.timeline-container {
            position: relative;
            margin: 40px 0;
        }
        
        .timeline-years {
            display: flex;
            justify-content: space-between;
            position: relative;
            margin-bottom: 30px;
        }
        
        .year {
            cursor: pointer;
            padding: 10px 15px;
            border-radius: 20px;
            background: #f8f9fa;
            font-weight: 600;
            color: #7f8c8d;
            transition: all 0.3s ease;
            box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
        }
        
        .year.active {
            background: linear-gradient(to right, #3498db, #2ecc71);
            color: white;
            transform: scale(1.1);
            box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
        }
        
        .timeline-content {
            position: relative;
            overflow: hidden;
            height: 350px;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        }
        
        .content-item {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0;
            transition: opacity 0.5s ease, transform 0.5s ease;
            transform: translateX(50px);
            display: flex;
            align-items: center;
            padding: 20px;
            background: white;
        }
        
        .content-item.active {
            opacity: 1;
            transform: translateX(0);
            z-index: 10;
        }
        
        .content-image {
            flex: 1;
            height: 100%;
            overflow: hidden;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .content-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .content-image:hover img {
            transform: scale(1.05);
        }
        
        .content-text {
            flex: 1;
            padding: 25px;
        }
        
        .content-text h2 {
            color: #2c3e50;
            margin-bottom: 15px;
            font-size: 24px;
        }
        
        .content-text p {
            color: #7f8c8d;
            line-height: 1.6;
            font-size: 16px;
        }
        
        .timeline-bar {
            height: 4px;
            background: #e0e0e0;
            position: relative;
            margin: 30px 0;
            border-radius: 2px;
        }
        
        .timeline-progress {
            position: absolute;
            height: 100%;
            background: linear-gradient(to right, #3498db, #2ecc71);
            border-radius: 2px;
            transition: width 0.4s ease;
        }
        
        .timeline-controls {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 20px;
        }
        
        .arrow {
            cursor: pointer;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: #f8f9fa;
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 20px;
            color: #7f8c8d;
            transition: all 0.3s ease;
            box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
        }
        
        .arrow:hover {
            background: linear-gradient(to right, #3498db, #2ecc71);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
        }
        
        .timeline-dots {
            display: flex;
            justify-content: center;
            gap: 15px;
        }
        
        .dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: #e0e0e0;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .dot.active {
            background: linear-gradient(to right, #3498db, #2ecc71);
            transform: scale(1.3);
        }
        
        @media (max-width: 768px) {
            .content-item {
                flex-direction: column;
                overflow-y: auto;
            }
            
            .content-image {
                width: 100%;
                height: 200px;
                margin-bottom: 15px;
            }
            
            .content-text {
                padding: 15px;
            }
            
            .year {
                padding: 8px 12px;
                font-size: 14px;
            }
        }