/* ==================== 全局样式 ==================== */
:root {
    --color-primary: #1a1a1a;
    --color-secondary: #666;
    --color-accent: #c5a880;
    --color-bg: #fafafa;
    --color-white: #ffffff;
    --color-border: #e5e5e5;
    --color-shadow: rgba(0, 0, 0, 0.08);
    --color-overlay: rgba(0, 0, 0, 0.6);
    
    --font-primary: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
    --font-secondary: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ==================== 加载动画 ==================== */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-white);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.crystal-loader {
    width: 60px;
    height: 60px;
    position: relative;
    animation: crystal-rotate 2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.crystal-loader::before,
.crystal-loader::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid var(--color-accent);
    border-radius: var(--radius-sm);
}

.crystal-loader::before {
    transform: rotate(45deg);
    animation: crystal-pulse 2s ease-in-out infinite;
}

.crystal-loader::after {
    transform: rotate(-45deg);
    animation: crystal-pulse 2s ease-in-out infinite 1s;
}

@keyframes crystal-rotate {
    0%, 100% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(180deg) scale(0.8); }
}

@keyframes crystal-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* ==================== 头部 ==================== */
.header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-secondary);
    font-size: 2rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    color: var(--color-primary);
    position: relative;
}

.logo::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--color-accent);
}

.search-box {
    position: relative;
    width: 300px;
}

.search-input {
    width: 100%;
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 50px;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    transition: var(--transition);
    background: var(--color-bg);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-white);
    box-shadow: 0 4px 12px var(--color-shadow);
}

.search-icon {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-secondary);
    pointer-events: none;
}

/* ==================== 分类筛选 ==================== */
.filter-section {
    background: var(--color-white);
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-border);
}

.filter-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.filter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.filter-title {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-primary);
    letter-spacing: 0.05em;
}

.clear-filter {
    background: none;
    border: 1px solid var(--color-border);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-family: var(--font-primary);
    font-size: 0.9rem;
    color: var(--color-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.clear-filter:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.category-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.category-btn {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    color: var(--color-secondary);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.category-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
}

.category-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

/* ==================== 产品网格 ==================== */
.main-content {
    padding: var(--spacing-xl) 0;
    min-height: 60vh;
}

.product-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.product-count {
    font-size: 1rem;
    color: var(--color-secondary);
}

.sort-select {
    padding: 0.6rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    background: var(--color-white);
    cursor: pointer;
    transition: var(--transition);
}

.sort-select:focus {
    outline: none;
    border-color: var(--color-accent);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.product-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--color-border);
    animation: fade-in 0.5s ease forwards;
    opacity: 0;
}

@keyframes fade-in {
    to {
        opacity: 1;
    }
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px var(--color-shadow);
    border-color: var(--color-accent);
}

.product-image-wrapper {
    position: relative;
    width: 100%;
    padding-top: 100%;
    overflow: hidden;
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
}

.product-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-card:hover .product-image {
    transform: scale(1.1);
}

.product-badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--color-accent);
    color: var(--color-white);
    padding: 0.3rem 0.8rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    z-index: 2;
}

.stock-badge {
    top: auto;
    bottom: var(--spacing-sm);
    background: rgba(220, 53, 69, 0.9);
}

.product-info {
    padding: var(--spacing-md);
}

.product-category {
    font-size: 0.85rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xs);
}

.product-name {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
}

.product-price {
    font-family: var(--font-secondary);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-primary);
}

.product-price-twd {
    font-size: 0.85rem;
    color: var(--color-secondary);
    margin-top: 0.25rem;
}

.no-results {
    text-align: center;
    padding: var(--spacing-xxl) 0;
}

.no-results-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.no-results h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.no-results p {
    color: var(--color-secondary);
}

/* ==================== 加载更多 ==================== */
.load-more-wrapper {
    text-align: center;
    padding: var(--spacing-lg) 0;
}

.load-more-btn {
    padding: 1rem 2.5rem;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50px;
    font-family: var(--font-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.load-more-btn:hover {
    background: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px var(--color-shadow);
}

/* ==================== 弹窗 ==================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-overlay);
    backdrop-filter: blur(4px);
    animation: fade-in 0.3s ease;
}

.modal-content {
    position: relative;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slide-up 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

@keyframes slide-up {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--color-white);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: var(--transition);
    box-shadow: 0 4px 12px var(--color-shadow);
}

.modal-close:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: rotate(90deg);
}

.modal-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl);
}

.modal-gallery {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.modal-main-image {
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.modal-main-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.modal-thumbnails {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: var(--spacing-sm);
}

.modal-thumbnail {
    aspect-ratio: 1;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

.modal-thumbnail:hover,
.modal-thumbnail.active {
    border-color: var(--color-accent);
}

.modal-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.modal-details {
    display: flex;
    flex-direction: column;
}

.modal-category {
    font-size: 0.9rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.modal-name {
    font-size: 2rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.modal-price {
    font-family: var(--font-secondary);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.modal-price-twd {
    font-size: 1.1rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-lg);
}

.modal-description {
    color: var(--color-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.modal-contact {
    padding: var(--spacing-md);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-accent);
}

.modal-contact h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.modal-contact p {
    color: var(--color-secondary);
    font-size: 0.95rem;
}

/* ==================== 回到顶部 ==================== */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 50px;
    height: 50px;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 4px 12px var(--color-shadow);
    z-index: 99;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 20px var(--color-shadow);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
    
    .modal-body {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .search-box {
        width: 100%;
    }
    
    .logo {
        font-size: 1.5rem;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: var(--spacing-md);
    }
    
    .product-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .category-list {
        max-height: 200px;
        overflow-y: auto;
    }
}

@media (max-width: 480px) {
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
    
    .modal-content {
        max-height: 95vh;
    }
    
    .modal-body {
        padding: var(--spacing-md);
        gap: var(--spacing-md);
    }
    
    .modal-name {
        font-size: 1.5rem;
    }
    
    .modal-price {
        font-size: 2rem;
    }
}