.index-product-section {
            width: 1600px;
            margin: 0 auto;
            padding: 100px 0;
            position: relative;
        }

        .index-product-container {
            justify-content: center;
            display: flex;
            align-items: center;
            position: relative;
            min-height: 600px;
        }

        /* 左侧时间轴 */
        .index-timeline-wrapper {
            width: 300px;
            position: relative;
            padding-left: 50px;
        }

        .index-timeline-line {
            position: absolute;
            left: 20px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(to bottom, #004290, #0066cc);
        }

        .index-timeline-node {
            position: relative;
            margin-bottom: 60px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .index-timeline-node:hover {
            transform: translateX(10px);
        }

        .index-timeline-dot {
            position: absolute;
            left: -38px;
            top: 50%;
            transform: translateY(-50%);
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background-color: #fff;
            border: 3px solid #004290;
            transition: all 0.3s ease;
            z-index: 2;
        }

        .index-timeline-node.active .index-timeline-dot {
            width: 24px;
            height: 24px;
            left: -42px;
            background-color: #004290;
            box-shadow: 0 0 20px rgba(0, 66, 144, 0.5);
        }

        .index-timeline-title {
            font-size: 18px;
            font-weight: 600;
            color: #004290;
            margin-bottom: 8px;
            transition: all 0.3s ease;
        }

        .index-timeline-node.active .index-timeline-title {
            font-size: 22px;
            color: #004290;
        }

        .index-timeline-subtitle {
            font-size: 14px;
            color: #666;
        }

        /* 中间圆形图片 */
        .index-image-wrapper {
            width: 800px;
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }

        .index-image-circle {
            width: 600px;
            height: 600px;
            border-radius: 50%;
            overflow: hidden;
            position: relative;
            box-shadow: 0 20px 60px rgba(0, 66, 144, 0.2);
            transition: all 0.6s ease;
        }

        .index-image-circle:hover {
            transform: scale(1.05);
            box-shadow: 0 30px 80px rgba(0, 66, 144, 0.3);
        }

        .index-product-image {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: all 0.6s ease;
        }

        .index-image-circle:hover .index-product-image {
            transform: scale(1.1);
        }

        .index-image-ring {
            position: absolute;
            width: 640px;
            height: 640px;
            border-radius: 50%;
            border: 2px dashed #004290;
            animation: index-rotate 20s linear infinite;
        }

        @keyframes index-rotate {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }

        /* 右侧内容 */
        .index-content-wrapper {
            width: 300px;
        }

        .index-product-card {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.6s ease;
            display: none;
        }

        .index-product-card.active {
            opacity: 1;
            transform: translateY(0);
            display: block;
            animation: index-fadeInUp 0.6s ease;
        }

        @keyframes index-fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .index-product-title {
            font-size: 36px;
            font-weight: 700;
            color: #004290;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .index-product-description {
            font-size: 16px;
            color: #666;
            line-height: 1.8;
            margin-bottom: 30px;
        }

        .index-product-features {
            margin-bottom: 30px;
        }

        .index-feature-item {
            display: flex;
            align-items: center;
            margin-bottom: 12px;
            font-size: 15px;
            color: #555;
        }

        .index-feature-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: #004290;
            margin-right: 12px;
        }

        .index-link-button {
            display: inline-block;
            padding: 16px 40px;
            background-color: #004290;
            color: #fff;
            text-decoration: none;
            font-size: 16px;
            font-weight: 600;
            border-radius: 50px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .index-link-button::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s ease;
        }

        .index-link-button:hover::before {
            left: 100%;
        }

        .index-link-button:hover {
            background-color: #003366;
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(0, 66, 144, 0.3);
        }

        /* 媒体查询 */
        @media (max-width: 1600px) {
            .index-product-section {
                width: 1400px;
            }
        }

        @media (max-width: 1400px) {
            .index-product-section {
                width: 1200px;
            }
            
            .index-image-circle {
                width: 500px;
                height: 500px;
            }
            
            .index-image-ring {
                width: 550px;
                height: 550px;
            }
            
            .index-product-title {
                font-size: 32px;
            }
        }

        @media (max-width: 1200px) {
            .index-product-section {
                width: 100%;
                padding: 80px 40px;
            }
            
            .index-product-container {
                flex-direction: column;
                text-align: center;
            }
            
            .index-timeline-wrapper {
                width: 100%;
                padding-left: 0;
                margin-bottom: 60px;
                display: flex;
                justify-content: center;
                flex-wrap: wrap;
            }
            
            .index-timeline-line {
                display: none;
            }
            
            .index-timeline-node {
                margin: 0 20px 20px 20px;
                padding: 15px 25px;
                border: 2px solid #004290;
                border-radius: 30px;
            }
            
            .index-timeline-dot {
                display: none;
            }
            
            .index-timeline-node:hover {
                transform: translateY(-5px);
            }
            
            .index-timeline-node.active {
                background-color: #004290;
            }
            
            .index-timeline-node.active .index-timeline-title {
                color: #fff;
                font-size: 18px;
            }
            
            .index-image-wrapper {
                width: 100%;
                margin-bottom: 60px;
            }
            
            .index-content-wrapper {
                width: 100%;
                padding-left: 0;
            }
            
            .index-feature-item {
                justify-content: center;
            }
        }

        @media (max-width: 768px) {
            .index-product-section {
                padding: 60px 20px;
            }
            
            .index-image-circle {
                width: 280px;
                height: 280px;
            }
            
            .index-image-ring {
                width: 320px;
                height: 320px;
            }
            
            .index-product-title {
                font-size: 28px;
            }
            
            .index-timeline-node {
                margin: 0 10px 15px 10px;
                padding: 12px 20px;
            }
        }