/* 基础样式重置和变量定义 */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #4a90e2;
    --text-color: #333;
    --light-gray: #f5f5f5;
    --border-color: #ddd;
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* 主容器样式 */
.merchandise-container {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 2rem;
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 1rem;
}

/* 筛选区域样式 */
.filter-section {
    background: #fff;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    height: fit-content;
    position: sticky;
    top: 2rem;
}

.filter-section h2 {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 0.5rem;
}

.filter-group {
    margin-bottom: 1.8rem;
}

.filter-group h3 {
    font-family: 'Open Sans', sans-serif;
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.filter-options {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

/* Artists下拉列表样式 */
.filter-group {
    margin-bottom: 1.5rem;
}

.filter-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-size: 0.9rem;
}

.filter-group select {
    width: 100%;
    padding: 0.8rem;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-color);
    font-size: 0.95rem;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234a90e2' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.8rem center;
    background-size: 1em;
    transition: var(--transition);
    font-family: 'Open Sans', sans-serif;
}

.filter-group select.artists-selected {
    padding-right: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.filter-group select:hover,
.filter-group select:focus {
    border-color: var(--secondary-color);
    outline: none;
    box-shadow: 0 0 0 1px var(--secondary-color);
}

.filter-group select option {
    padding: 1rem 0.8rem;
    background: #fff;
    color: var(--text-color);
    font-size: 0.95rem;
    transition: var(--transition);
}

.filter-group select option:checked {
    background-color: var(--secondary-color);
    color: #fff;
}

.filter-group select option:hover {
    background-color: var(--light-gray);
}

.filter-group select option:hover {
    background-color: var(--light-gray);
    color: var(--secondary-color);
}

/* 复选框样式 */
.filter-checkbox {
    display: flex;
    align-items: center;
    padding: 0.8rem 0;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    border-bottom: 1px solid var(--border-color);
}

.filter-checkbox:last-child {
    border-bottom: none;
}

.filter-checkbox input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.filter-checkbox .filter-name {
    padding-left: 2rem;
    position: relative;
    flex-grow: 1;
    font-size: 0.95rem;
    color: var(--text-color);
}

.filter-checkbox .filter-name::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    background-color: #fff;
    transition: var(--transition);
}

.filter-checkbox .filter-name::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 50%;
    transform: translateY(-50%) scale(0);
    width: 6px;
    height: 10px;
    border: solid var(--secondary-color);
    border-width: 0 2px 2px 0;
    transform-origin: center;
    transition: var(--transition);
}

.filter-checkbox:hover .filter-name::before {
    border-color: var(--secondary-color);
}

.filter-checkbox input[type="checkbox"]:checked + .filter-name::before {
    border-color: var(--secondary-color);
    background-color: #fff;
}

.filter-checkbox input[type="checkbox"]:checked + .filter-name::after {
    transform: translateY(-75%) rotate(45deg) scale(1);
}

.filter-checkbox .filter-count {
    margin-left: auto;
    color: #666;
    font-size: 0.9rem;
    transition: var(--transition);
}

.filter-checkbox:hover .filter-count,
.filter-checkbox input[type="checkbox"]:checked ~ .filter-count {
    color: var(--secondary-color);
}

/* Size和Type筛选链接通用样式 */
.size-links,
.type-links {
    display: flex;
    flex-direction: column;
    margin-top: 0.5rem;
}

.filter-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-decoration: none;
    color: var(--text-color);
    padding: 0.8rem 0;
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
}

.filter-link:last-child {
    border-bottom: none;
}

.filter-link:hover {
    color: var(--secondary-color);
    padding-left: 0.5rem;
    background-color: var(--light-gray);
}

.filter-link.active {
    color: var(--secondary-color);
    font-weight: 600;
}

.filter-name {
    font-size: 0.95rem;
    font-weight: 500;
}

.filter-count {
    color: #666;
    font-size: 0.9rem;
}

/* Type链接特殊样式 */
.type-links .filter-link {
    padding: 1rem 0;
}

.type-links .filter-link:hover {
    padding-left: 0.8rem;
}

.type-links .filter-count {
    color: var(--secondary-color);
}

.filter-link:hover .filter-count {
    color: var(--secondary-color);
}

.filter-link.active .filter-count {
    color: var(--secondary-color);
}

/* 商品区域样式 */
.products-section {
    flex: 1;
}

/* 排序选项样式 */
.sort-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: #fff;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.product-count {
    font-size: 0.9rem;
    color: var(--accent-color);
}

.sort-select {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.9rem;
    color: var(--text-color);
    background-color: #fff;
    cursor: pointer;
    transition: var(--transition);
}

.sort-select:hover {
    border-color: var(--secondary-color);
}

/* 商品网格样式 */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

/* 商品卡片样式 */
.product-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.product-image {
    position: relative;
    padding-top: 100%;
    overflow: hidden;
}

.artwork-link {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
    overflow: hidden;
    cursor: pointer;
}

.product-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.artwork-link:hover img {
    transform: scale(1.05);
}

.artwork-link::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0);
    transition: var(--transition);
}

.artwork-link:hover::after {
    background: rgba(0, 0, 0, 0.1);
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-info {
    padding: 1.2rem;
}

.product-title {
    font-family: 'Playfair Display', serif;
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.product-artist {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0.8rem;
}

.product-price {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.add-to-cart {
    width: 100%;
    padding: 0.8rem;
    background-color: var(--secondary-color);
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

.add-to-cart:hover {
    background-color: var(--primary-color);
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.page-button {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: #fff;
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
    border-radius: 4px;
}

.page-button.active {
    background-color: var(--secondary-color);
    color: #fff;
    border-color: var(--secondary-color);
}

.page-button:hover:not(.active) {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .merchandise-container {
        grid-template-columns: 220px 1fr;
    }
}

@media (max-width: 992px) {
    .merchandise-container {
        grid-template-columns: 1fr;
    }

    .filter-section {
        position: fixed;
        top: 0;
        left: -300px;
        width: 280px;
        height: 100vh;
        z-index: 1000;
        transition: var(--transition);
        overflow-y: auto;
    }

    .filter-section.active {
        left: 0;
    }

    .filter-toggle {
        position: fixed;
        bottom: 2rem;
        right: 2rem;
        padding: 1rem;
        background: var(--secondary-color);
        color: #fff;
        border: none;
        border-radius: 50%;
        box-shadow: var(--shadow);
        cursor: pointer;
        z-index: 999;
    }
}

@media (max-width: 768px) {
    .product-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    }

    .sort-options {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }
}

@media (max-width: 480px) {
    .merchandise-container {
        padding: 0.5rem;
    }

    .product-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .pagination {
        flex-wrap: wrap;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.product-card {
    animation: fadeIn 0.5s ease-out;
}

/* 购物车图标样式 */
.cart-icon {
    position: relative;
}

.cart-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--secondary-color);
    color: #fff;
    font-size: 0.8rem;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: bounce 0.3s ease;
}

@keyframes bounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

/* View More 按钮样式 */
.view-more {
    display: block;
    width: 120px;
    margin: 15px auto;
    padding: 10px 0;
    background-color: var(--secondary-color);
    color: #fff;
    text-align: center;
    text-decoration: none;
    border-radius: 4px;
    transition: var(--transition);
    font-weight: 600;
}

.view-more:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* 筛选按钮容器 */
.filter-actions {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin: 20px 0;
}

/* 筛选按钮样式 */
.apply-filters,
.clear-filters {
    flex: 1;
    display: inline-block;
    padding: 12px;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
}

.apply-filters {
    background-color: var(--secondary-color);
    color: #fff;
    border: none;
}

.apply-filters:hover {
    background-color: #3576c4;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(74, 144, 226, 0.2);
}

.clear-filters {
    background-color: #fff;
    color: var(--text-color);
    border: 2px solid var(--border-color);
}

.clear-filters:hover {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}


/* 错误消息样式 */
.error-message {
    background-color: #ff4444;
    color: white;
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}