:root {
    --primary-color: #4a6fa5;
    --secondary-color: #6e9cd2;
    --accent-color: #ff6b6b;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --gray-light: #e9ecef;
    --border-radius: 12px;
    --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    color: var(--dark-color);
    min-height: 100vh;
}

.ai-container {
    max-width: 1400px!important;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 30px;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    backdrop-filter: blur(10px);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 10px;
}

.logo i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

header h1 {
    color: var(--primary-color);
    font-size: 2.2rem;
    margin: 0;
}

header p {
    color: #6c757d;
    font-size: 1.1rem;
}

.main-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 25px;
}

.chat-container {
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 700px;
    backdrop-filter: blur(10px);
}

.chat-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-status {
    background-color: var(--success-color);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.chat-status::before {
    content: '';
    width: 8px;
    height: 8px;
    background-color: white;
    border-radius: 50%;
    display: inline-block;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    display: flex;
    gap: 12px;
    max-width: 80%;
}

.user-message {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.user-message .avatar {
    background: linear-gradient(135deg, var(--accent-color) 0%, #ff8e8e 100%);
}

.message-content {
    background-color: var(--light-color);
    padding: 15px;
    border-radius: 18px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.user-message .message-content {
    background-color: var(--primary-color);
    color: white;
}

.message-sender {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 5px;
    color: var(--primary-color);
}

.user-message .message-sender {
    color: white;
}

.message-time {
    font-size: 0.75rem;
    color: #6c757d;
    margin-top: 8px;
    text-align: right;
}

.user-message .message-time {
    color: rgba(255, 255, 255, 0.8);
}

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 20px 15px;
    color: #6c757d;
    font-size: 0.9rem;
    display: none;
}

.typing-dots {
    display: flex;
    gap: 4px;
}

.typing-dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--primary-color);
    animation: typingAnimation 1.4s infinite ease-in-out;
}

.typing-dots span:nth-child(1) {
    animation-delay: 0s;
}

.typing-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typingAnimation {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.5;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

.chat-input {
    padding: 20px;
    border-top: 1px solid var(--gray-light);
}

.input-container {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.input-container input {
    flex: 1;
    padding: 15px;
    border: 1px solid var(--gray-light);
    border-radius: 30px;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

.input-container input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.2);
}

.input-container button {
    padding: 15px 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.input-container button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(74, 111, 165, 0.3);
}

.suggestions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.suggestions span {
    font-size: 0.9rem;
    color: #6c757d;
}

.suggestion-btn {
    padding: 8px 15px;
    background-color: var(--light-color);
    border: 1px solid var(--gray-light);
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

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

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.product-links, .stats-card {
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 25px;
    backdrop-filter: blur(10px);
}

.product-links h3, .stats-card h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.product-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
}

.product-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px;
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--dark-color);
    transition: var(--transition);
}

.product-card:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.product-card i {
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
}

.stats-card {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.stat-item {
    text-align: center;
    padding: 15px;
    background-color: var(--light-color);
    border-radius: var(--border-radius);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9rem;
    color: #6c757d;
}

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

.loader-wrapper.active {
    visibility: visible;
    opacity: 1;
}

.loader {
    text-align: center;
    background-color: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.loader-circle {
    width: 60px;
    height: 60px;
    border: 5px solid var(--gray-light);
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loader-text {
    font-size: 1.1rem;
    color: var(--dark-color);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .chat-container {
        height: 600px;
    }
}

@media (max-width: 576px) {
    header {
        padding: 20px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .message {
        max-width: 90%;
    }

    .suggestions {
        flex-direction: column;
        align-items: flex-start;
    }
}
/* 导航栏样式 */
.navbar {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.2rem;
}

.nav-logo i {
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    gap: 25px;
}

.nav-link {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-color);
}

/* 面包屑导航 */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px 0;
    color: #6c757d;
    font-size: 0.9rem;
}

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

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb i {
    font-size: 0.7rem;
}

/* 产品详情容器 */
.product-detail-container {
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 30px;
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
}

/* 产品头部信息 */
.product-header {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.product-image {
    width: 100%;
    height: 300px;
    border-radius: var(--border-radius);
    overflow: hidden;
    background-color: var(--light-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.product-info h1 {
    color: var(--dark-color);
    margin-bottom: 15px;
    font-size: 2rem;
}

.product-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.brand, .category {
    padding: 5px 12px;
    background-color: var(--light-color);
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--dark-color);
}

.price {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 25px;
}

.rating-overview {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.average-rating {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.stars {
    font-size: 1.5rem;
    color: var(--warning-color);
    margin-bottom: 10px;
}

.rating-count {
    color: #6c757d;
    font-size: 0.9rem;
}

.rating-distribution {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.rating-bar {
    display: flex;
    align-items: center;
    gap: 10px;
}

.rating-level {
    width: 30px;
    font-size: 0.9rem;
    color: var(--dark-color);
}

.progress-bar {
    flex: 1;
    height: 8px;
    background-color: var(--gray-light);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--warning-color);
    border-radius: 4px;
    transition: width 0.5s ease;
}

/* 标签导航 */
.tab-navigation {
    display: flex;
    border-bottom: 1px solid var(--gray-light);
    margin-bottom: 25px;
}

.tab-btn {
    padding: 12px 25px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    font-size: 1rem;
    font-weight: 500;
    color: #6c757d;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--primary-color);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

/* 标签内容 */
.tab-content {
    min-height: 400px;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 评价筛选器 */
.review-filters {
    display: flex;
    gap: 15px;
    align-items: end;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.filter-group label {
    font-size: 0.9rem;
    color: #6c757d;
}

.filter-group select {
    padding: 8px 12px;
    border: 1px solid var(--gray-light);
    border-radius: 6px;
    background-color: white;
}

.filter-btn {
    padding: 8px 16px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    background-color: var(--secondary-color);
}

/* 评价列表 */
.reviews-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.review-card {
    border: 1px solid var(--gray-light);
    border-radius: var(--border-radius);
    padding: 20px;
    transition: var(--transition);
}

.review-card:hover {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

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

.reviewer-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.reviewer-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--light-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
}

.reviewer-name {
    font-weight: 500;
}

.review-date {
    font-size: 0.9rem;
    color: #6c757d;
}

.review-rating {
    color: var(--warning-color);
    font-size: 1.1rem;
}

.review-title {
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--dark-color);
    font-size: 1.1rem;
}

.review-text {
    margin-bottom: 15px;
    line-height: 1.6;
}

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

.review-helpful {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: #6c757d;
}

.helpful-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    background: none;
    border: none;
    color: #6c757d;
    cursor: pointer;
    transition: var(--transition);
}

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

/* 分页控件 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-top: 30px;
}

.page-btn {
    padding: 10px 15px;
    background-color: var(--light-color);
    border: 1px solid var(--gray-light);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 5px;
}

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

.page-info {
    font-size: 0.9rem;
    color: #6c757d;
}

/* 规格表格 */
.specs-table {
    display: flex;
    flex-direction: column;
    gap: 0;
    border: 1px solid var(--gray-light);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.spec-row {
    display: flex;
    border-bottom: 1px solid var(--gray-light);
}

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

.spec-name {
    width: 150px;
    padding: 15px;
    background-color: var(--light-color);
    font-weight: 500;
}

.spec-value {
    flex: 1;
    padding: 15px;
}

/* 问答区域 */
.qa-section .chat-container {
    height: 500px;
}

/* 底部信息 */
.footer {
    background-color: var(--dark-color);
    color: white;
    padding: 30px 0;
    margin-top: 50px;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .product-header {
        grid-template-columns: 1fr;
    }

    .rating-overview {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .nav-menu {
        display: none;
    }
}

@media (max-width: 768px) {
    .review-filters {
        flex-direction: column;
        align-items: stretch;
    }

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

    .spec-row {
        flex-direction: column;
    }

    .spec-name {
        width: 100%;
        border-bottom: 1px solid var(--gray-light);
    }
}