body {
    background-color: #ffffff;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.goods-items {
    width: 100%;
    display: flex;
    margin: 20px 0 20px 0;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}

.goods-item {
    flex: 1;
    width: 25%;
    margin: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    padding: 10px;
    text-align: center;
    box-shadow: 2px 2px 5px #ccc;
    display: inline-block;
    cursor: pointer;
    min-width: 80px;
    transition: all 0.3s ease;
}

.goods-item:hover {
    background-color: #f0f0f0;
}

.goods-item.active {
    background-color: black;
    color: #fff;
}

.content {
    display: none;
}

.active {
    display: block;
    height: auto;
}

.goods-img {
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: auto;
    border: 1px solid #ccc;
    flex-wrap: wrap;
    padding: 10px;
}

.goods-img img {
    width: 300px;
    max-width: 100%;
    height: auto;
    border: 1px solid #ccc;
    margin: 20px;
    flex: 1 1 250px;
}

.product-display {
    border-style: solid;
    border-width: 10px;
    border-color: white white black white;
    text-align: center;
    font-size: 30px;
    margin: 0 auto;
    justify-content: center;
    width: 40%;
}

.product-display h2 {
    font-weight: 350;
    margin: 0;
    padding: 10px 0;
}

/* 移动端响应式设计 */
@media (max-width: 768px) {
    .product-display {
        font-size: 24px;
        width: 80%;
        border-width: 5px;
        margin: 20px auto;
    }
    
    .goods-items {
        gap: 8px;
        margin: 15px 0;
    }
    
    .goods-item {
        padding: 8px 15px;
        font-size: 14px;
        min-width: 70px;
        margin: 5px;
    }
    
    .goods-img {
        flex-direction: column;
        padding: 10px 5px;
    }
    
    .goods-img img {
        width: 100%;
        max-width: 280px;
        margin: 10px auto;
        flex: none;
    }
}

@media (max-width: 480px) {
    .product-display {
        font-size: 20px;
        width: 90%;
        border-width: 3px;
        margin: 15px auto;
        padding: 5px 0;
    }
    
    .goods-items {
        gap: 5px;
        margin: 10px 0;
    }
    
    .goods-item {
        padding: 6px 12px;
        font-size: 13px;
        min-width: 60px;
        margin: 3px;
    }
    
    .goods-img {
        padding: 5px;
    }
    
    .goods-img img {
        max-width: 250px;
        margin: 8px auto;
    }
}

/* 平板设备优化 */
@media (min-width: 769px) and (max-width: 1024px) {
    .goods-img img {
        width: 250px;
    }
}