* {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Microsoft YaHei', Arial, sans-serif;
        background: #0f0f1a;
        color: #fff;
        min-height: 100vh;
    }

    header {
        text-align: center;
        padding: 60px 20px 40px;
        background: linear-gradient(135deg, #1a1a2e 0%, #0f0f23 100%);
        border-bottom: 2px solid #00d4ff;
    }

    header h1 {
        font-size: 42px;
        background: linear-gradient(45deg, #00d4ff, #ff00ff);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        margin-bottom: 10px;
    }

    header p {
        color: #aaa;
        font-size: 18px;
    }

    /* Tab栏 */
    .tabs {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 10px;
        padding: 30px 20px 10px;
        background: #12121f;
    }

    .tab-btn {
        padding: 12px 28px;
        background: #1a1a2e;
        border: 1px solid #333;
        border-radius: 30px;
        color: #ccc;
        font-size: 16px;
        cursor: pointer;
        transition: all 0.3s;
    }

    .tab-btn:hover,
    .tab-btn.active {
        background: linear-gradient(45deg, #00d4ff, #0099cc);
        color: #000;
        border-color: #00d4ff;
    }

    /* 产品区 */
    .products {
        max-width: 1300px;
        margin: 0 auto;
        padding: 40px 20px;
    }

    .product-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
        gap: 25px;
    }

    .product-card {
        background: linear-gradient(145deg, #1a1a2e, #16213e);
        border-radius: 12px;
        overflow: hidden;
        border: 1px solid #333;
        transition: all 0.3s;
    }

    .product-card:hover {
        transform: translateY(-8px);
        border-color: #00d4ff;
        box-shadow: 0 15px 35px rgba(0, 212, 255, 0.2);
    }

    .product-img {
        width: 100%;
        height: 160px;
        object-fit: cover;
    }

    .product-info {
        padding: 20px;
    }

    .product-info h3 {
        font-size: 18px;
        margin-bottom: 8px;
        color: #fff;
    }

    .product-info p {
        font-size: 13px;
        color: #999;
        margin-bottom: 12px;
    }

    .product-meta {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .product-price {
        color: #ff006e;
        font-size: 22px;
        font-weight: bold;
    }

    .buy-btn {
        padding: 10px 25px;
        background: linear-gradient(45deg, #f26262, #ef474d);
        border: none;
        border-radius: 20px;
        color: #fff;
        font-weight: bold;
        cursor: pointer;
        transition: all 0.3s;
    }

    .buy-btn:hover {
        transform: scale(1.08);
        box-shadow: 0 5px 20px rgba(0, 212, 255, 0.5);
    }

    /* 隐藏非激活Tab内容 */
    .tab-content {
        display: none;
    }

    .tab-content.active {
        display: block;
    }

    /* 功能说明区 */
    .features {
        max-width: 1300px;
        margin: 40px auto;
        padding: 0 20px 40px;
    }

    .features h2 {
        text-align: center;
        font-size: 32px;
        color: #00d4ff;
        margin-bottom: 30px;
    }

    .features-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 20px;
    }

    .feature-card {
        background: #16213e;
        padding: 25px;
        border-radius: 12px;
        border: 1px solid #333;
        text-align: center;
    }

    .feature-card .icon {
        font-size: 40px;
        margin-bottom: 15px;
    }

    .feature-card h4 {
        color: #fff;
        margin-bottom: 10px;
    }

    .feature-card p {
        color: #aaa;
        font-size: 14px;
    }

    footer {
        text-align: center;
        padding: 30px 20px;
        background: #0a0a0a;
        color: #555;
        font-size: 14px;
        border-top: 1px solid #222;
    }