/* ========== 商品詳細內頁專用樣式 ========== */

/* 麵包屑導航 */
.product-detail-section .breadcrumb {
    margin-bottom: 20px;
    padding: 0;
    background: transparent;
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.product-detail-section .breadcrumb-item {
    white-space: nowrap;
}

.product-detail-section .breadcrumb-item + .breadcrumb-item::before {
    content: ">";
    padding: 0 8px;
    color: #6c757d;
}

.product-detail-section .breadcrumb-item.active {
    color: #6c757d;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
}

.product-detail-section {
    padding: 40px 0;
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
    background: #ffffff;
}

.product-detail-container {
    display: grid;
    grid-template-columns: 0.85fr 1.7fr;
    gap: 40px;
    margin-bottom: 60px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    align-items: start;
}

.product-images {
    position: sticky;
    top: 110px; /* header 高度 + 間距 */
    align-self: start;
    overflow-x: hidden;
    width: 100%;
    max-width: 45vh; /* 限制最大寬度，避免圖片區塊過寬 */
    box-sizing: border-box;
}

.main-image-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: 4px;
    margin-bottom: 15px;
    background-color: #f8f9fa;
    cursor: crosshair;
    background-image: var(--magnifier-image, none);
    background-size: var(--magnifier-bg-size, cover);
    background-position: var(--magnifier-bg-position, center);
    background-repeat: no-repeat;
}

.main-image {
    width: 100%;
    height: 100%;
    aspect-ratio: 1;
    object-fit: contain;
    object-position: center;
    border-radius: 4px;
    max-width: 100%;
    background-color: #f8f9fa;
    user-select: none;
    -webkit-user-drag: none;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

/* 當滑鼠移入時，隱藏原始圖片，顯示放大的背景圖片 */
.main-image-wrapper:hover .main-image {
    opacity: 0;
}

.thumbnail-images {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    overflow-y: hidden;
    padding-bottom: 5px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
}

.thumbnail-images::-webkit-scrollbar {
    height: 6px;
}

.thumbnail-images::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.thumbnail-images::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 10px;
}

.thumbnail-images::-webkit-scrollbar-thumb:hover {
    background: #555;
}

.thumbnail {
    width: 80px;
    height: 80px;
    min-width: 80px;
    object-fit: cover;
    border-radius: 4px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color 0.3s;
    background: #f8f9fa;
}

.thumbnail:hover,
.thumbnail.active {
    border-color: #4CAF50;
}

.product-detail-section .product-info-section {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
}

/* 商品詳細頁專用樣式 - 使用 .product-detail-section 作用域 */
.product-detail-section .product-info-section {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
}

.product-detail-section .product-info-section h1 {
    font-size: 1.7rem;
    margin-bottom: 15px;
    color: #333;
    line-height: 1.3;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.product-detail-section .product-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
    flex-wrap: wrap;
    align-items: center;
}

.product-detail-section .product-rating {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.product-detail-section .stars {
    color: #ffc107;
    font-size: 1.2rem;
    white-space: nowrap;
}

.product-detail-section .product-price-section {
    margin: 30px 0;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.product-detail-section .current-price {
    font-size: 2.5rem;
    font-weight: bold;
    color: #e74c3c;
    margin-right: 15px;
    line-height: 1.2;
}

.product-detail-section .original-price {
    font-size: 1.5rem;
    color: #999;
    text-decoration: line-through;
    line-height: 1.2;
}

.product-detail-section .discount-badge {
    background: #e74c3c;
    color: white;
    padding: 5px 12px;
    border-radius: 4px;
    font-size: 0.9rem;
    margin-left: 10px;
    white-space: nowrap;
}

.product-detail-section .product-description {
    margin: 20px 0;
    line-height: 1.8;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.product-detail-section .product-description p {
    margin: 0;
    color: #666;
}

.product-detail-section .stock-info {
    margin: 20px 0;
    font-size: 1rem;
}

.product-detail-section .product-actions {
    margin: 30px 0;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.product-detail-section .quantity-selector {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.product-detail-section .quantity-selector label {
    font-weight: 600;
    white-space: nowrap;
}

.product-detail-section .quantity-controls {
    display: flex;
    align-items: center;
    border: 1px solid #ddd;
    border-radius: 4px;
    overflow: hidden;
}

.product-detail-section .qty-btn {
    background: #f8f9fa;
    border: none;
    width: 40px;
    height: 40px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: background 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.product-detail-section .qty-btn:hover {
    background: #e9ecef;
}

.product-detail-section .qty-btn:active {
    background: #dee2e6;
}

.product-detail-section .qty-input {
    width: 60px;
    height: 40px;
    text-align: center;
    border: none;
    border-left: 1px solid #ddd;
    border-right: 1px solid #ddd;
    font-size: 1rem;
}

.product-detail-section .action-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    width: 100%;
}

.product-detail-section .btn-add-cart,
.product-detail-section .btn-buy-now {
    flex: 1;
    min-width: 140px;
    padding: 15px 30px;
    border: none;
    border-radius: 4px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    white-space: nowrap;
}

.product-detail-section .btn-add-cart {
    background: #28a745;
    color: white;
}

.product-detail-section .btn-add-cart:hover {
    background: #218838;
}

.product-detail-section .btn-add-cart:active {
    background: #1e7e34;
}

.product-detail-section .btn-buy-now {
    background: #e74c3c;
    color: white;
}

.product-detail-section .btn-buy-now:hover {
    background: #c0392b;
}

.product-detail-section .btn-buy-now:active {
    background: #a93226;
}

/* 商品詳細頁的收藏按鈕（使用特定選擇器避免與商品列表頁衝突） */
.product-detail-section .wishlist-btn,
.action-buttons .wishlist-btn {
    min-width: 140px;
    height: 50px;
    padding: 0 20px;
    border: 2px solid #ddd;
    border-radius: 4px;
    background: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 1rem;
    color: #666;
    transition: all 0.3s;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    position: static;
    width: auto;
}

.product-detail-section .wishlist-btn:hover,
.action-buttons .wishlist-btn:hover {
    border-color: #e74c3c;
    color: #e74c3c;
    background: #fff5f5;
}

.product-detail-section .wishlist-btn.active,
.action-buttons .wishlist-btn.active {
    border-color: #e74c3c;
    background: #e74c3c;
    color: white;
}

.product-detail-section .wishlist-btn.active:hover,
.action-buttons .wishlist-btn.active:hover {
    background: #c0392b;
    border-color: #c0392b;
}

.product-detail-section .wishlist-btn i,
.action-buttons .wishlist-btn i {
    font-size: 1.2rem;
}

.product-detail-section .wishlist-btn-text,
.action-buttons .wishlist-btn-text {
    font-size: 0.95rem;
    font-weight: 500;
}

/* 商品詳細頁專用樣式 - 使用 .product-detail-section 作用域 */
.product-detail-section .product-details-tabs {
    margin-top: 60px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
}

.product-detail-section .tab-nav {
    display: flex;
    border-bottom: 2px solid #eee;
    margin-bottom: 30px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.product-detail-section .tab-nav::-webkit-scrollbar {
    display: none;
}

.product-detail-section .tab-btn {
    padding: 15px 30px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-size: 1.6vh;
    transition: all 0.3s;
    white-space: nowrap;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.product-detail-section .tab-btn.active {
    font-weight: 600;
    border-bottom-color: #4CAF50;
    color: #4CAF50;
}

.product-detail-section .tab-content {
    display: none;
    padding: 30px 0;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.product-detail-section .tab-content.active {
    display: block;
}

.product-detail-section .tab-content .table {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    display: block;
}

.product-detail-section .tab-content .table tbody {
    display: table;
    width: 100%;
}

.product-detail-section .review-form {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 4px;
    margin-top: 30px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.product-detail-section .rating-input {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.product-detail-section .rating-star {
    font-size: 2rem;
    color: #ddd;
    cursor: pointer;
    transition: color 0.2s;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.product-detail-section .rating-star.active,
.product-detail-section .rating-star:hover {
    color: #ffc107;
}

.product-detail-section .reviews-list {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
}

.product-detail-section .review-item {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* 相關商品區域樣式 */
.product-detail-section .related-products-section {
    margin-top: 60px;
    padding: 40px;
    background: #f8f9fa;
    border-radius: 4px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
}

.related-products-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 15px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.related-products-title i {
    margin-right: 10px;
    color: #4CAF50;
    font-size: 1.5rem;
}

.related-products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.related-product-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.related-product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.related-product-image {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: linear-gradient(135deg, #e0e0e0, #f0f0f0);
}

.related-product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.related-product-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: #4CAF50;
    color: white;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 11px;
    font-weight: 600;
    z-index: 2;
    text-transform: uppercase;
}

.related-product-badge.hot {
    background: #FF5722;
}

.related-product-info {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.related-product-rating {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    flex-shrink: 0;
    flex-wrap: wrap;
}

.related-product-name {
    font-size: 15px;
    color: #333;
    margin-bottom: 12px;
    line-height: 1.5;
    flex-shrink: 0;
    min-height: 45px;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.related-product-name a {
    color: #333;
    text-decoration: none;
    transition: color 0.3s ease;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-product-name a:hover {
    color: #4CAF50;
}

.related-product-price {
    margin-top: auto;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.related-original-price {
    color: #999;
    text-decoration: line-through;
    font-size: 14px;
}

.related-current-price {
    color: #4CAF50;
    font-size: 20px;
    font-weight: 600;
}

.related-discount-badge {
    background: #e74c3c;
    color: white;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
}

.related-product-stock {
    margin-top: 0;
    margin-bottom: 0;
}

.stock-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
}

.stock-badge.in-stock {
    background: #d4edda;
    color: #155724;
}

.stock-badge.low-stock {
    background: #fff3cd;
    color: #856404;
}

.stock-badge.out-of-stock {
    background: #f8d7da;
    color: #721c24;
}

/* ========== 響應式設計 ========== */

/* 平板版 (768px - 992px) */
@media (max-width: 992px) {
    .product-detail-section {
        padding: 30px 0;
    }

    .product-detail-container {
        grid-template-columns: 1fr;
        gap: 30px;
        margin-bottom: 40px;
    }

    .product-images {
        position: relative;
        top: 0;
    }

    .main-image {
        aspect-ratio: 1;
        object-fit: contain;
        object-position: center;
        background-color: #f8f9fa;
    }

    .thumbnail {
        width: 70px;
        height: 70px;
        min-width: 70px;
    }

    .product-info-section h1 {
        font-size: 1.75rem;
    }

    .current-price {
        font-size: 2rem;
    }

    .original-price {
        font-size: 1.3rem;
    }

    .related-products-section {
        padding: 30px 20px;
    }

    .related-products-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 20px;
    }

    .related-product-image {
        height: 180px;
    }

    .related-product-info {
        padding: 15px;
    }
}

/* 手機版 (最大 767px) */
@media (max-width: 767px) {
    .product-detail-section {
        padding: 20px 0;
    }

    .product-detail-container {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-bottom: 30px;
        padding: 0 10px;
    }

    .product-images {
        position: relative;
        top: 0;
        padding: 0;
    }

    .main-image {
        width: 100%;
        aspect-ratio: 1;
        object-fit: contain;
        object-position: center;
        border-radius: 8px;
        margin-bottom: 10px;
        background-color: #f8f9fa;
    }

    .thumbnail-images {
        gap: 8px;
        padding-bottom: 5px;
    }

    .thumbnail {
        width: 60px;
        height: 60px;
        min-width: 60px;
        border-radius: 6px;
    }

    .product-info-section {
        padding: 0;
    }

    .product-info-section h1 {
        font-size: 1.5rem;
        margin-bottom: 12px;
        line-height: 1.4;
    }

    .product-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        margin-bottom: 15px;
        padding-bottom: 15px;
    }

    .product-rating {
        gap: 8px;
    }

    .stars {
        font-size: 1rem;
    }

    .product-price-section {
        margin: 20px 0;
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .current-price {
        font-size: 1.8rem;
        margin-right: 0;
    }

    .original-price {
        font-size: 1.2rem;
    }

    .discount-badge {
        font-size: 0.85rem;
        padding: 4px 10px;
        margin-left: 0;
    }

    .product-description {
        margin: 15px 0;
        font-size: 0.95rem;
    }

    .stock-info {
        margin: 15px 0;
        font-size: 0.95rem;
    }

    .product-actions {
        margin: 20px 0;
    }

    .quantity-selector {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        margin-bottom: 15px;
    }

    .quantity-selector label {
        width: 100%;
    }

    .quantity-controls {
        /* width: 100%; */
        max-width: 200px;
    }

    .qty-btn {
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
    }

    .qty-input {
        width: 70px;
        height: 45px;
        font-size: 1.1rem;
    }

    .action-buttons {
        flex-direction: column;
        gap: 12px;
    }
    
    .action-buttons .wishlist-btn {
        width: 100%;
        min-width: auto;
    }

    .btn-add-cart,
    .btn-buy-now {
        width: 100%;
        min-width: unset;
        padding: 14px 20px;
        font-size: 1rem;
    }

    .product-detail-section .wishlist-btn,
    .action-buttons .wishlist-btn {
        width: 100%;
        height: 45px;
        min-width: unset;
    }

    .product-details-tabs {
        margin-top: 40px;
        padding: 0 10px;
    }

    .tab-nav {
        margin-bottom: 20px;
        gap: 0;
    }

    .tab-btn {
        padding: 12px 15px;
        font-size: 0.95rem;
        flex: 1;
        min-width: 0;
    }

    .tab-content {
        padding: 20px 0;
    }

    .tab-content .table {
        font-size: 0.9rem;
    }

    .tab-content .table th,
    .tab-content .table td {
        padding: 8px 10px;
    }

    .review-form {
        padding: 20px;
        margin-top: 20px;
    }

    .rating-input {
        gap: 8px;
    }

    .rating-star {
        font-size: 1.8rem;
    }

    .reviews-list {
        margin-top: 20px;
    }

    .review-item {
        padding: 15px;
        margin-bottom: 15px;
        font-size: 0.9rem;
    }

    .related-products-section {
        margin-top: 40px;
        padding: 20px 15px;
        border-radius: 8px;
    }

    .related-products-title {
        font-size: 1.4rem;
        margin-bottom: 20px;
        padding-bottom: 12px;
    }

    .related-products-title i {
        font-size: 1.3rem;
        margin-right: 8px;
    }

    .related-products-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 15px;
    }

    .related-product-image {
        height: 150px;
    }

    .related-product-info {
        padding: 12px;
    }

    .related-product-name {
        font-size: 14px;
        min-height: 40px;
        margin-bottom: 10px;
    }

    .related-current-price {
        font-size: 18px;
    }

    .related-original-price {
        font-size: 13px;
    }

    .related-product-rating {
        margin-bottom: 8px;
    }
}

/* 小手機版 (最大 480px) */
@media (max-width: 480px) {
    .product-detail-section {
        padding: 15px 0;
    }

    .product-detail-section .breadcrumb {
        font-size: 0.85rem;
        margin-bottom: 15px;
    }

    .product-detail-section .breadcrumb-item {
        max-width: 120px;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .product-detail-container {
        gap: 15px;
        padding: 0 5px;
    }

    .product-info-section h1 {
        font-size: 1.3rem;
    }

    .current-price {
        font-size: 1.6rem;
    }

    .original-price {
        font-size: 1.1rem;
    }

    .thumbnail {
        width: 50px;
        height: 50px;
        min-width: 50px;
    }

    .quantity-controls {
        max-width: 180px;
    }

    .qty-btn {
        width: 40px;
        height: 40px;
    }

    .qty-input {
        width: 60px;
        height: 40px;
    }

    .tab-btn {
        padding: 10px 12px;
        font-size: 0.9rem;
    }

    .related-products-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 12px;
    }

    .related-product-image {
        height: 140px;
    }

    .related-product-info {
        padding: 10px;
    }

    .related-product-name {
        font-size: 13px;
        min-height: 36px;
    }

    .related-current-price {
        font-size: 16px;
    }
}

/* 防止橫向滾動 */
.product-detail-section,
.product-detail-container,
.product-info-section,
.product-actions,
.product-details-tabs,
.related-products-section {
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

/* 確保容器不會溢出 */
/* 商品詳細頁專用的 container，不影響全局 */
.product-detail-section .container {
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}