.product-page-container {
        display: flex;
        max-width: 100%;
        margin: 30px auto;
        padding: 0 15px;
    }
    
    /* Left Navigation */
    .product-nav {
        width: 250px;
        background: white;
        border-radius: 5px;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        padding: 20px;
        margin-right: 30px;
        position: sticky;
        top: 20px;
        height: fit-content;
    }
    
    .product-nav h2 {
        font-size: 18px;
        margin-bottom: 15px;
        padding-bottom: 10px;
        border-bottom: 1px solid #eee;
        color: #333;
    }
    
    .product-nav ul {
        list-style: none;
    }
    
    .product-nav li {
        margin-bottom: 10px;
    }
    
    .product-nav a {
        display: block;
        padding: 8px 10px;
        color: #555;
        text-decoration: none;
        border-radius: 4px;
        transition: all 0.3s ease;
    }
    
    .product-nav a:hover, 
    .product-nav a.active {
        background-color: #f0f0f0;
        color: #2a6496;
    }
    
    /* Product Detail */
    .product-detail {
        display: flex;
        flex: 1;
        background: white;
        border-radius: 5px;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        padding: 30px;
    }
    
 


/* 响应式设计 - 添加到现有CSS中 */
@media (max-width: 1200px) {
    .product-page-container {
        max-width: 95%;
    }
}

@media (max-width: 992px) {
    .product-detail {
        flex-direction: column;
    }
    
}

@media (max-width: 768px) {
    .product-page-container {
        flex-direction: column;
    }
    
    .product-nav {
        width: 100%;
        position: static;
        margin-right: 0;
        margin-bottom: 20px;
    }
    
}

@media (max-width: 480px) {
    .product-nav ul {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .product-nav li {
        margin-bottom: 5px;
    }
    

}

/* 横屏手机优化 */
@media (max-height: 500px) and (orientation: landscape) {
    .popup-content {
        max-height: 90vh;
        overflow-y: auto;
    }
}

/* 高DPI设备优化 */
@media 
(-webkit-min-device-pixel-ratio: 2), 
(min-resolution: 192dpi) { 
    .product-main-image {
        border: 1px solid #f0f0f0;
    }
}