.ider-timeline-section {
        padding: 60px 0;
        font-family: inherit;
        background-color: #ffffff;
    }
    .ider-timeline-header {
        text-align: center;
        margin-bottom: 60px;
    }
    .ider-timeline-title {
        color: #04006F; /* 主题色：深蓝 */
        font-size: 36px;
        font-weight: bold;
        margin-bottom: 15px;
        text-transform: uppercase;
    }
    .ider-timeline-subtitle {
        font-size: 16px;
        color: #555;
        max-width: 800px;
        margin: 0 auto;
        line-height: 1.6;
    }
    .ider-timeline-subtitle strong {
        color: #04006F;
        font-size: 1.1em;
    }
    .ider-timeline-grid {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        gap: 30px;
        position: relative;
        max-width: 1000px;
        margin: 0 auto;
    }
    /* 电脑端的时间轴连接线 */
    .ider-timeline-grid::before {
        content: '';
        position: absolute;
        top: 45px; /* 对齐圆圈中心 */
        left: 50px;
        right: 50px;
        height: 2px;
        background-color: #e0e0e0;
        z-index: 1;
    }
    .ider-timeline-item {
        flex: 1;
        min-width: 260px;
        text-align: center;
        position: relative;
        z-index: 2;
    }
    .ider-timeline-year {
        width: 90px;
        height: 90px;
        background-color: #04006F; /* 主题色：深蓝 */
        color: #fff;
        border: 4px solid #fff;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 24px;
        font-weight: bold;
        margin: 0 auto 25px auto;
        box-shadow: 0 4px 12px rgba(4, 0, 111, 0.15);
        transition: all 0.3s ease;
        cursor: default;
    }
    /* 鼠标悬停时，圆圈变成点缀色（明黄），文字变成深蓝 */
    .ider-timeline-item:hover .ider-timeline-year {
        background-color: #F2BA02; /* 点缀色：明黄 */
        color: #04006F;
        transform: translateY(-5px);
        box-shadow: 0 8px 15px rgba(242, 186, 2, 0.3);
    }
    .ider-timeline-text {
        background: #fdfdfd;
        padding: 30px 20px;
        border-radius: 8px;
        border-top: 4px solid #F2BA02; /* 顶部卡片线使用明黄点缀 */
        font-size: 15px;
        line-height: 1.6;
        color: #333;
        box-shadow: 0 2px 10px rgba(0,0,0,0.04);
        transition: all 0.3s ease;
    }
    .ider-timeline-item:hover .ider-timeline-text {
        box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    }
    /* 手机端自适应：隐藏连接线，改为上下堆叠 */
    @media (max-width: 768px) {
        .ider-timeline-grid::before {
            display: none; 
        }
        .ider-timeline-grid {
            flex-direction: column;
            align-items: center;
            gap: 40px;
        }
        .ider-timeline-item {
            width: 100%;
            max-width: 400px;
        }
    }