body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-primary);
    background-color: #fff;
}

.navbar {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
}

.navbar-brand {
    color: var(--checkout-primary);
    font-weight: bold;
    font-size: 1.5rem;
}

.breadcrumb {
    background-color: transparent;
    padding: 1rem 0;
}

.breadcrumb-item a {
    color: var(--text-secondary);
    text-decoration: none;
}

.breadcrumb-item.active {
    color: var(--text-primary);
}

.product-container {
    margin-top: 2rem;
}

.product-image-section {
    position: sticky;
    top: 20px;
}

.product-main-image {
    width: 100%;
    max-width: 500px;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 2rem;
    background: #fff;
    margin-bottom: 1rem;
}

.product-thumbnails {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.thumbnail {
    width: 80px;
    height: 80px;
    border: 2px solid var(--border-light);
    border-radius: 4px;
    padding: 0.5rem;
    cursor: pointer;
    transition: all 0.3s;
}

.thumbnail:hover {
    border-color: var(--checkout-primary);
}

.product-info-section {
    padding-left: 2rem;
}

.brand-name {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.product-title {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.stars {
    color: #ffc107;
}

.rating-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.price-section {
    background: var(--bg-input);
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.price-main {
    font-size: 2rem;
    font-weight: bold;
    color: var(--checkout-primary);
}

.price-unit {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-left: 0.5rem;
}

.price-original {
    color: var(--text-secondary);
    text-decoration: line-through;
    margin-left: 1rem;
}

.product-specs {
    margin: 1.5rem 0;
}

.spec-item {
    display: flex;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-light);
}

.spec-label {
    font-weight: 600;
    min-width: 120px;
    color: var(--text-primary);
}

.spec-value {
    color: var(--text-secondary);
}

.btn-add-to-cart {
    background-color: var(--checkout-primary);
    color: #fff;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 4px;
    width: 100%;
    margin-top: 1rem;
    transition: background-color 0.3s;
}

.btn-add-to-cart:hover {
    background-color: var(--checkout-primary-dark);
    color: #fff;
}

.btn-wishlist {
    background-color: #fff;
    color: var(--text-primary);
    border: 2px solid var(--border-light);
    padding: 1rem;
    border-radius: 4px;
    width: 100%;
    margin-top: 0.5rem;
    transition: all 0.3s;
}

.btn-wishlist:hover {
    border-color: var(--checkout-primary);
    color: var(--checkout-primary);
}

.shipping-info {
    background: var(--bg-primary-lightest);
    padding: 1rem;
    border-radius: 4px;
    margin-top: 1rem;
    border-left: 4px solid var(--checkout-primary);
}

.shipping-info i {
    color: var(--checkout-primary);
    margin-right: 0.5rem;
}

.product-tabs {
    margin-top: 3rem;
    border-bottom: 2px solid var(--border-light);
}

/* 覆蓋 Bootstrap 的 CSS 變數（如果頁面載入了 Bootstrap） */
:root {
    --bs-nav-link-padding-y: 15px;
    --bs-nav-link-padding-x: 18px;
}

.nav-tabs .nav-link {
    color: var(--text-primary);
    border: none;
    border-bottom: 3px solid transparent;
    padding: 15px 18px !important;
    /* 使用 !important 覆蓋 Bootstrap 變數，與導航選單的 nav-link 保持一致 */
    font-weight: 500;
    margin: 0;
    /* 確保沒有額外 margin */
}

.nav-tabs .nav-link:hover {
    border-bottom-color: var(--checkout-primary);
    color: var(--checkout-primary);
}

.nav-tabs .nav-link.active {
    color: var(--checkout-primary);
    border-bottom-color: var(--checkout-primary);
    background: transparent;
}

.tab-content {
    padding: 2rem 0;
}

/* ===== 客戶評價樣式 ===== */

/* 評價數量徽章 */
.review-count-badge {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
    margin-left: 5px;
    font-weight: 600;
}

/* 評價容器 */
.reviews-container {
    max-width: 1200px;
    margin: 0 auto;
}

/* 評價統計區 */
.review-summary {
    display: flex;
    gap: 40px;
    padding: 30px;
    background: linear-gradient(135deg, #f8f9fa 0%, var(--bg-primary-lightest) 100%);
    border-radius: 12px;
    margin-bottom: 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.review-summary-left {
    flex-shrink: 0;
    text-align: center;
    padding: 20px;
}

.average-rating {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.rating-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-darker);
    line-height: 1;
}

.rating-stars {
    display: flex;
    gap: 5px;
    font-size: 20px;
    color: #ffc107;
}

.rating-stars i.fas {
    color: #ffc107;
}

.rating-stars i.far {
    color: #ddd;
}

.rating-count {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 5px;
}

.review-summary-right {
    flex: 1;
    display: flex;
    align-items: center;
}

.rating-breakdown {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.rating-bar-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.star-label {
    min-width: 50px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 5px;
}

.star-label i {
    color: #ffc107;
    font-size: 12px;
}

.progress-bar-container {
    flex: 1;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--primary-light) 100%);
    transition: width 0.5s ease;
    border-radius: 4px;
}

.count-label {
    min-width: 40px;
    text-align: right;
    font-size: 13px;
    color: var(--text-secondary);
}

/* 篩選與排序 */
.review-filters {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
    padding: 20px;
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.filter-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

.filter-select {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-select:hover {
    border-color: var(--primary-color);
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

/* 評價列表 */
.reviews-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.review-item {
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 12px;
    padding: 25px;
    transition: all 0.3s ease;
}

.review-item:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.reviewer-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.reviewer-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    font-weight: 600;
    flex-shrink: 0;
}

.reviewer-details {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.reviewer-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.review-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-tertiary);
}

.review-rating {
    display: flex;
    gap: 3px;
    color: #ffc107;
    font-size: 14px;
}

.review-date {
    color: var(--text-tertiary);
    font-size: 13px;
}

.verified-purchase {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--primary-color);
    font-size: 12px;
    padding: 3px 8px;
    background: var(--bg-primary-lightest);
    border-radius: 4px;
}

.review-content {
    margin-bottom: 15px;
}

.review-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.review-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.review-images {
    display: flex;
    gap: 10px;
    margin: 15px 0;
    flex-wrap: wrap;
}

.review-image {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid #e0e0e0;
}

.review-image:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.review-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid #f0f0f0;
}

.review-helpful {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 13px;
    color: var(--text-secondary);
}

.btn-helpful {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 6px 12px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 13px;
    color: var(--text-secondary);
}

.btn-helpful:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

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

.btn-report {
    padding: 6px 12px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 13px;
    color: var(--text-tertiary);
}

.btn-report:hover {
    color: #d32f2f;
    border-color: #d32f2f;
}

/* 撰寫評價區域 */
.write-review-section {
    text-align: center;
    margin-top: 40px;
    padding: 40px 20px;
    background: #f8f9fa;
    border-radius: 12px;
}

.btn-write-review {
    padding: 15px 40px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-primary);
}

.btn-write-review:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(76, 175, 80, 0.4);
}

.btn-write-review i {
    margin-right: 8px;
}

/* 分頁 */
.review-pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 30px;
    padding: 20px 0;
}

.page-btn {
    padding: 8px 14px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    color: var(--text-secondary);
}

.page-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

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

/* 無評價狀態 */
.no-reviews {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-tertiary);
}

.no-reviews i {
    font-size: 64px;
    color: #ddd;
    margin-bottom: 20px;
}

.no-reviews p {
    font-size: 16px;
    margin-bottom: 20px;
}

/* 響應式設計 */
@media (max-width: 768px) {
    .review-summary {
        flex-direction: column;
        gap: 20px;
        padding: 20px;
    }

    .review-filters {
        flex-direction: column;
        gap: 15px;
    }

    .filter-group {
        flex-direction: column;
        align-items: flex-start;
    }

    .filter-select {
        width: 100%;
    }

    .review-header {
        flex-direction: column;
        gap: 10px;
    }

    .review-footer {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    .review-images {
        gap: 8px;
    }

    .review-image {
        width: 80px;
        height: 80px;
    }
}

/* ===== 原有樣式繼續 ===== */

.benefits-list {
    list-style: none;
    padding: 0;
}

.benefits-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.benefits-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--checkout-primary);
    font-weight: bold;
}

.supplement-facts {
    border: 1px solid var(--border-light);
    border-radius: 4px;
    padding: 1.5rem;
    margin-top: 1rem;
}

.supplement-facts h4 {
    border-bottom: 2px solid var(--text-primary);
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

.fact-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-light);
}

.fact-row:last-child {
    border-bottom: none;
}

.fact-label {
    font-weight: 500;
}