/* 移动端底部导航 */
        .mobile-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: #fff;
            box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
            z-index: 1000;
            padding: 10px 0;
        }
        
        .nav-items {
            display: flex;
            justify-content: space-around;
            padding: 0 10px;
        }
        
        .nav-item {
            color: #333;
            font-size: 14px;
            padding: 8px 12px;
            border-radius: 20px;
            white-space: nowrap;
            text-decoration: none;
            display: inline-block;
        }
        
        .nav-item:hover {
            background: #f0f0f0;
        }
        
        @media (max-width: 768px) {
            .mobile-nav {
                display: block;
            }
        }

/* 客服弹窗样式 */
.cs-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2000;
}

.cs-modal-content {
    position: relative;
    background: #fff;
    margin: 15% auto;
    margin-top: 200px;
    padding: 20px;
    width: 80%;
    max-width: 300px;
    border-radius: 8px;
    text-align: center;
}

.cs-image {
    max-width: 100%;
    height: auto;
    margin-top: 15px;
}

.cs-close {
    position: absolute;
    right: 15px;
    top: 10px;
    color: #aaa;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.cs-close:hover {
    color: #666;
}

/* 新增样式 */
.loading-spinner {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
}

.loading-spinner .spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.error-message {
    display: none;
    color: #e74c3c;
    padding: 15px;
    text-align: center;
}

.cs-image {
    display: none;
    max-width: 80%;
    max-height: 80%;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}