:root {
        --primary-color: #00f7ff;
        --bg-gradient: linear-gradient(45deg, #0a0a1a 0%, #000022 100%);
        --card-bg: rgba(255,255,255,0.03);
        --glow-effect: 0 0 15px rgba(58, 58, 255, 0.5);
    }
    
    .about-us {
        padding: 100px 20px;
        background: var(--bg-gradient);
        position: relative;
        
    }
    

    .section-header {
        text-align: center;
        margin-bottom: 60px;
    }
    .section-header h2 {
        font-size: 2.5em;
        color: var(--primary-color);
        text-shadow: var(--glow-effect);
        margin: 50px auto;
    }
    .deco-line {
        width: 100px;
        height: 2px;
        background: var(--primary-color);
        margin: 20px auto;
        box-shadow: var(--glow-effect);
    }
    
    .core-values {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 40px;
        max-width: 1200px;
        margin: 0 auto;
    }
    .value-card {
        padding: 30px;
        border: 1px solid rgba(0, 247, 255, 0.1);
        border-radius: 15px;
        position: relative;
        overflow: hidden;
        transition: transform 0.5s;
    }
    .value-card:hover {
        transform: translateY(-10px);
        box-shadow: var(--glow-effect);
    }
    .value-card-bot{
        padding: 30px;
        border: 1px solid rgba(0, 247, 255, 0.1);
        border-radius: 15px;
        position: relative;
        overflow: hidden;
        max-width: 1230px;
        margin: 0 auto;
        text-align: center;
        /* transition: transform 0.5s; */
    }
    .value-card:hover {
        transform: translateY(-10px);
        box-shadow: var(--glow-effect);
    }
    .glow-effect {
        position: absolute;
        inset: 0;
        background: linear-gradient(45deg, 
            transparent 40%,
            rgba(0,247,255,0.1) 50%,
            transparent 60%);
        animation: gridFlow 6s infinite linear;
    }
    
 
    .business-structure {
        display: flex;
        justify-content: center;
        align-items: center;
        margin: 80px 0;
    }
    .structure-item {
        /* padding: 30px; */
        border-radius: 50%;
        width: 200px;
        height: 200px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        text-align: center;
        background: var(--card-bg);
        position: relative;
    }
    .structure-connector {
        width: 100px;
        height: 2px;
        background: var(--primary-color);
        margin: 0 20px;
    }
    .node-glow {
        position: absolute;
        width: 100%;
        height: 100%;
        border-radius: 50%;
        box-shadow: inset 0 0 30px var(--primary-color);
        animation: pulse 2s infinite;
    }
    
    /* 时间轴设计 */
    .timeline {
        position: relative;
        max-width: 900px;
        margin: 50px auto;
    }
    .timeline-item {
        padding: 20px 40px;
        position: relative;
    }
    .timeline-dot {
        width: 20px;
        height: 20px;
        background: var(--primary-color);
        border-radius: 50%;
        position: absolute;
        left: -10px;
        top: 25px;
        box-shadow: var(--glow-effect);
    }
    .timeline-content {
        padding: 20px;
        border-left: 2px solid var(--primary-color);
        margin-left: 30px;
    }
    
    /* 动画效果 */
    @keyframes gridFlow {
        100% { transform: rotate(360deg); }
    }
    @keyframes pulse {
        0%,100% { opacity: 0.3; }
        50% { opacity: 1; }
    }
    
    /* 响应式设计 */
    @media (max-width: 768px) {
        .core-values {
            grid-template-columns: 1fr;
        }
        .business-structure {
            flex-direction: column;
        }
        .structure-connector {
            width: 2px;
            height: 60px;
        }
    }