body {
    background-color: #efefef;
    font-family: Microsoft YaHei, Helvetica, '宋体', Tahoma, Arial, "\5b8b\4f53", sans-serif;
}

.search-bar {
    padding: 10px;
    background-color: #f8f9fa;
    border-bottom: 1px solid #ddd;
    margin-bottom: 10px;
}

.category-bar {
    display: flex;
    overflow-x: auto;
    white-space: nowrap;
    background-color: #fff;
    padding: 10px;
    border-bottom: 1px solid #ddd;
    margin-bottom: 10px;
}

.category-bar button {
    margin: 0 5px;
    padding: 5px 10px;
    border: 1px solid #ddd;
    background-color: #f8f9fa;
    border-radius: 3px;
    cursor: pointer;
}

.category-bar button.active {
    background-color: #5cb85c;
    color: #fff;
    border-color: #4cae4c;
}

.content {
    display: flex;
    margin-bottom: 20px;
}

@media (max-width: 767px) {
    .content {
        flex-direction: column;
    }
}

.sidebar {
    width: 40%;
    overflow-y: auto;
    padding: 10px;
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 3px;
}

@media (max-width: 767px) {
    .sidebar {
        width: 100%;
        margin-bottom: 10px;
    }
}

.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar li {
    margin: 5px 0;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 3px;
    cursor: pointer;
}

.sidebar li:hover {
    background-color: #f8f9fa;
}

.details {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
    margin-left: 10px;
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 3px;
}

@media (max-width: 767px) {
    .details {
        margin-left: 0;
    }
}

.product-item {
    margin-bottom: 10px;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 3px;
}

.product-item:hover {
    background-color: #f8f9fa;
}

.product-image {
    width: 100%;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f8f8f8;
    margin-bottom: 10px;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.product-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: flex-start;
    width: 100%;
}

.product-title {
    width: 100%;
    font-weight: bold;
    margin: 0 0 10px 0;
}

.product-left {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 10px;
}

.product-date {
    font-size: 1rem;
    color: #333;
    margin: 0 0 5px 0;
}

.product-price {
    font-size: 1.2rem;
    font-weight: bold;
    color: #e74c3c;
    margin: 5px 0 0 0;
}

.product-right {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.trend-button {
    padding: 5px 10px;
    font-size: 14px;
    color: #fff;
    background-color: #007bff;
    border: none;
    border-radius: 3px;
    cursor: pointer;
}

.trend-button:hover {
    background-color: #0056b3;
}

#loading {
    z-index: 9999;
    font-size: 18px;
    color: #007bff;
    display: none;
    text-align: center;
    padding: 20px;
}

.spinner-border {
    width: 3rem;
    height: 3rem;
}

.back {
    text-align: center;
    margin: 10px 0;
}

.price-trend {
    font-weight: bold;
    margin-left: 5px;
}

.price-trend.up {
    color: #e74c3c;
}

.price-trend.down {
    color: #27ae60;
}

.price-trend.stable {
    color: #3498db;
}

/* 小分类切换按钮 */
.subcategory-toggle {
    text-align: center;
    margin-bottom: 10px;
}

/* 小分类列表展开/收起样式 */
.subcategory-list.collapsed {
    display: none;
}

@media (max-width: 767px) {
    .subcategory-list.collapsed {
        display: none;
    }
}