/* assets/css/compare-styles.css - 模型对比页面样式 - 优化版 */

/* CSS变量定义 - 确保所有变量都存在 */
:root {
    --primary-color: #4F46E5;
    --primary-dark: #3730A3;
    --primary-light: #EEF2FF;
    --text-primary: #111827;
    --text-secondary: #374151;
    --text-muted: #6B7280;
    --bg-main: #F9FAFB;
    --bg-card: #FFFFFF;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --border-color: #E5E7EB;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --error-color: #EF4444;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.2);
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-medium: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 模型选择区域 */
.model-selection-section {
    margin-bottom: 1.5rem;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-medium);
}

.model-selection-section:hover {
    box-shadow: var(--shadow-lg);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.section-header h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-header h3::before {
    content: "🎯";
    font-size: 1.25rem;
}

.selection-counter {
    font-size: 0.875rem;
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

/* 分类筛选 */
.model-categories {
    margin-bottom: 2rem;
}

.category-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.filter-btn {
    padding: 0.6rem 1.2rem;
    border: 2px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

/* 模型选择网格 */
.model-selection-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.25rem;
}

.model-select-card {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.25rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.model-select-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.model-select-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.model-select-card:hover::before {
    transform: scaleX(1);
}

.model-select-card.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg,
        rgba(99, 102, 241, 0.05),
        rgba(99, 102, 241, 0.02)
    );
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.2);
}

.model-select-card.selected::before {
    transform: scaleX(1);
}

.model-select-card.selected .model-select-info h4,
.model-select-card.selected .model-select-info p,
.model-select-card.selected .feature-tag {
    color: var(--text-primary);
}

.model-select-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.model-select-logo {
    width: 48px;
    height: 48px;
    border-radius: 0.75rem;
    object-fit: contain;
    background: white;
    padding: 0.5rem;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.model-select-card:hover .model-select-logo {
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.model-select-card.selected .model-select-logo {
    border-color: var(--primary-color);
    background: white;
}

.model-select-info h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    transition: color 0.3s ease;
}

.model-select-info p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.model-select-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.feature-tag {
    font-size: 0.75rem;
    padding: 0.35rem 0.75rem;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: 0.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.model-select-card:hover .feature-tag {
    background: var(--bg-primary);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.model-select-card.selected .feature-tag {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* 对比结果区域 */
.comparison-results-section {
    margin-top: 2rem;
    animation: fadeIn 0.5s ease-out;
}

.comparison-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.comparison-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.comparison-header h3::before {
    content: "📊";
    font-size: 1.25rem;
}

.comparison-actions {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.action-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.comparison-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

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

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

.comparison-content {
    background: white;
    border-radius: 0.75rem;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* 图表容器 */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.chart-container {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.chart-container:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.chart-container h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.chart-container canvas {
    max-height: 300px;
    transition: all var(--transition-medium);
}

.chart-info {
    margin-top: 1rem;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-muted);
    text-align: center;
    line-height: 1.4;
}

.chart-info p {
    margin: 0;
}

/* 功能特性表格 */
.features-comparison-table {
    overflow-x: auto;
}

.features-comparison-table table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.features-comparison-table th,
.features-comparison-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.features-comparison-table th {
    background: var(--bg-primary);
    font-weight: 600;
    color: var(--text-primary);
    position: sticky;
    top: 0;
}

.features-comparison-table td {
    color: var(--text-secondary);
}

.features-comparison-table tr:hover {
    background: var(--bg-primary);
}

/* 价格对比卡片 */
.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.pricing-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1rem;
    transition: all 0.2s ease;
}

.pricing-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.pricing-card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.pricing-card-logo {
    width: 32px;
    height: 32px;
    border-radius: 0.25rem;
    object-fit: contain;
    background: white;
    padding: 0.25rem;
}

.pricing-card-title h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.pricing-card-title p {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.pricing-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.pricing-item:last-child {
    border-bottom: none;
}

.pricing-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.pricing-value {
    font-size: 0.875rem;
    font-weight: 500;
}

.pricing-value.free {
    color: var(--success-color);
}

.pricing-value.paid {
    color: var(--warning-color);
}

/* 适用人群对比 */
.audience-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

.audience-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1rem;
}

.audience-card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.audience-card-logo {
    width: 32px;
    height: 32px;
    border-radius: 0.25rem;
    object-fit: contain;
    background: white;
    padding: 0.25rem;
}

.audience-card-title h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.audience-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.audience-list li {
    padding: 0.5rem 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.audience-list li:last-child {
    border-bottom: none;
}

.audience-list li::before {
    content: "•";
    color: var(--primary-color);
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.empty-state h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.empty-state p {
    font-size: 0.875rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .model-selection-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .category-filter {
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 0.5rem;
    }
    
    .comparison-tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
    }
    
    .pricing-cards,
    .audience-comparison,
    .strengths-grid,
    .api-pricing-cards {
        grid-template-columns: 1fr;
    }
    
    .selected-models-panel {
        padding: 1rem;
    }
    
    .selected-models-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .modal-content {
        margin: 0.5rem;
        max-height: 85vh;
        max-width: 95vw;
    }
    
    .modal-model-grid {
        grid-template-columns: 1fr;
        max-height: 250px;
    }
    
    .modal-category-filter {
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 0.5rem;
    }
    
    .modal-footer {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .modal-cancel-btn,
    .modal-confirm-btn {
        width: 100%;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .comparison-content {
        padding: 1rem;
    }
    
    .chart-container canvas {
        max-height: 250px;
    }
}

@media (max-width: 480px) {
    .model-select-card {
        padding: 0.75rem;
    }
    
    .model-select-logo {
        width: 32px;
        height: 32px;
    }
    
    .model-select-info h4 {
        font-size: 0.875rem;
    }
    
    .model-select-info p {
        font-size: 0.75rem;
    }
    
    .feature-tag {
        font-size: 0.625rem;
    }
    
    .selected-models-panel {
        padding: 1rem;
    }
    
    .selected-models-list {
        gap: 0.5rem;
    }
    
    .selected-model-item {
        padding: 0.375rem 0.5rem;
        font-size: 0.75rem;
    }
    
    .selected-model-logo {
        width: 16px;
        height: 16px;
    }
    
    .strengths-grid,
    .api-pricing-cards {
        grid-template-columns: 1fr;
    }
    
    .strength-card,
    .api-pricing-card {
        padding: 1rem;
    }
    
    .strength-card-logo,
    .api-pricing-logo {
        width: 32px;
        height: 32px;
    }
    
    .add-model-section {
        padding: 1.5rem 1rem;
    }
    
    .add-model-btn {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
    
    .modal-header {
        padding: 1rem 1rem 0.75rem 1rem;
    }
    
    .modal-body {
        padding: 0.75rem 1rem;
    }
    
    .modal-footer {
        padding: 0.75rem 1rem;
    }
    
    .modal-model-grid {
        max-height: 200px;
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .modal-model-card {
        padding: 0.75rem;
    }
    
    .modal-model-logo {
        width: 28px;
        height: 28px;
    }
    
    .modal-model-info h4 {
        font-size: 0.9rem;
    }
    
    .modal-model-info p {
        font-size: 0.75rem;
    }
    
    .modal-feature-tag {
        font-size: 0.65rem;
        padding: 0.2rem 0.4rem;
    }
}

/* 已选择模型显示区域 */
.selected-models-panel {
    background: linear-gradient(135deg,
        rgba(99, 102, 241, 0.03),
        rgba(99, 102, 241, 0.01)
    );
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.15);
    animation: fadeIn 0.4s ease-out;
}

.selected-models-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(99, 102, 241, 0.2);
    flex-wrap: wrap;
    gap: 0.5rem;
}

.selected-models-header h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.selected-models-header h4::before {
    content: "✓";
    font-size: 1rem;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.clear-all-btn {
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.clear-all-btn:hover {
    background: var(--primary-color);
    color: white;
}

.selected-models-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.selected-model-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

.selected-model-item:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.selected-model-logo {
    width: 20px;
    height: 20px;
    border-radius: var(--radius-sm);
    object-fit: contain;
    flex-shrink: 0;
}

.selected-model-name {
    font-weight: 500;
    color: var(--text-primary);
}

.remove-model-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 50%;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.25rem;
    height: 1.25rem;
    font-size: 1rem;
    line-height: 1;
}

.remove-model-btn:hover {
    background: var(--error-color);
    color: white;
}

.add-more-model-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

.add-more-model-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.5);
}

.add-more-model-btn .add-icon {
    font-size: 1rem;
    font-weight: 300;
}

.add-more-model-btn .add-text {
    font-size: 0.875rem;
    font-weight: 600;
}

.selected-models-header h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.selected-models-header h4::before {
    content: "✓";
    font-size: 1rem;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.clear-all-btn {
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.clear-all-btn:hover {
    background: var(--primary-color);
    color: white;
}

.selected-models-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.selected-model-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
}

.selected-model-item:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    background: white;
}

.selected-model-logo {
    width: 20px;
    height: 20px;
    border-radius: 0.25rem;
    object-fit: contain;
}

.selected-model-name {
    font-weight: 500;
    color: var(--text-primary);
}

.remove-model-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 50%;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.25rem;
    height: 1.25rem;
}

.remove-model-btn:hover {
    background: var(--error-color);
    color: white;
}

/* 添加模型按钮区域 */
.add-model-section {
    text-align: center;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 2px dashed var(--border-color);
    transition: all 0.3s ease;
}

.add-model-section:hover {
    border-color: var(--primary-color);
    background: linear-gradient(135deg,
        rgba(99, 102, 241, 0.02),
        rgba(99, 102, 241, 0.01)
    );
}

.add-model-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
    margin-bottom: 0.5rem;
}

.add-model-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.add-model-btn:active {
    transform: translateY(0);
}

.add-icon {
    font-size: 1.5rem;
    font-weight: 300;
}

.add-model-hint {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0;
    line-height: 1.4;
}

.add-more-model-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.5);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
}

.add-more-model-btn .add-icon {
    font-size: 1rem;
    font-weight: 300;
}

.add-more-model-btn .add-text {
    font-size: 0.875rem;
    font-weight: 600;
}

/* 添加模型按钮区域 */
.add-model-section {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 0.75rem;
    border: 2px dashed var(--border-color);
    transition: all 0.3s ease;
}

.add-model-section:hover {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, 
        rgba(99, 102, 241, 0.02),
        rgba(99, 102, 241, 0.01)
    );
}

.add-model-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
    margin-bottom: 0.5rem;
}

.add-model-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.add-model-btn:active {
    transform: translateY(0);
}

.add-icon {
    font-size: 1.5rem;
    font-weight: 300;
}

.add-model-hint {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0;
}

/* 模型选择弹窗 */
.model-selection-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.model-selection-modal.active {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    background: white;
    border-radius: 1rem;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.2),
        0 0 0 1px rgba(255, 255, 255, 0.1);
    width: 100%;
    max-width: 800px;
    max-height: 75vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: modalSlideIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 1px solid var(--border-color);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-30px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 1.5rem 1rem 1.5rem;
    background: linear-gradient(135deg, 
        var(--bg-primary) 0%, 
        var(--bg-secondary) 100%
    );
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-header h3::before {
    content: "🎯";
    font-size: 1.25rem;
}

.modal-close-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    font-size: 1.125rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 300;
}

.modal-close-btn:hover {
    background: var(--error-color);
    color: white;
    border-color: var(--error-color);
    transform: scale(1.1);
}

.modal-body {
    flex: 1;
    padding: 1rem 1.5rem;
    overflow-y: auto;
    background: var(--bg-primary);
}

.modal-selection-counter {
    text-align: center;
    font-size: 1rem;
    color: var(--primary-color);
    background: linear-gradient(135deg, 
        rgba(99, 102, 241, 0.12),
        rgba(99, 102, 241, 0.06)
    );
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 2px solid var(--primary-color);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.15);
    position: relative;
    overflow: hidden;
}

.modal-selection-counter::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.2), 
        transparent
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

.modal-categories {
    margin-bottom: 1.5rem;
}

.modal-category-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
}

.modal-filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: 0.5rem;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.modal-filter-btn::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(99, 102, 241, 0.1), 
        transparent
    );
    transition: left 0.5s ease;
}

.modal-filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
}

.modal-filter-btn:hover::before {
    left: 100%;
}

.modal-filter-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
    transform: translateY(-2px);
}

.modal-search-box {
    margin-bottom: 1.5rem;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    font-size: 0.9rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.search-input::placeholder {
    color: var(--text-secondary);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    background: var(--bg-primary);
}

.modal-search-box::before {
    content: "🔍";
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1rem;
    color: var(--text-secondary);
    pointer-events: none;
}

.modal-model-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
    max-height: 350px;
    overflow-y: auto;
    padding: 0.25rem;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) var(--bg-secondary);
}

.modal-model-grid::-webkit-scrollbar {
    width: 8px;
}

.modal-model-grid::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}

.modal-model-grid::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

.modal-model-grid::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

.modal-model-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.modal-model-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.modal-model-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.modal-model-card:hover::before {
    transform: scaleX(1);
}

.modal-model-card.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, 
        rgba(99, 102, 241, 0.12),
        rgba(99, 102, 241, 0.06)
    );
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.25);
}

.modal-model-card.selected::before {
    transform: scaleX(1);
}

.modal-model-card.selected::after {
    content: "✓";
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: bold;
    box-shadow: 0 4px 8px rgba(99, 102, 241, 0.4);
    animation: checkmarkBounce 0.3s ease-out;
}

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

.modal-model-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.modal-model-logo {
    width: 36px;
    height: 36px;
    border-radius: 0.5rem;
    object-fit: contain;
    background: white;
    padding: 0.25rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.modal-model-card:hover .modal-model-logo {
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.modal-model-card.selected .modal-model-logo {
    border-color: var(--primary-color);
}

.modal-model-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    transition: color 0.3s ease;
}

.modal-model-info p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.modal-model-card:hover .modal-model-info h4,
.modal-model-card:hover .modal-model-info p {
    color: var(--text-primary);
}

.modal-model-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

.modal-feature-tag {
    font-size: 0.7rem;
    padding: 0.25rem 0.5rem;
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: 0.375rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.modal-model-card:hover .modal-feature-tag {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.modal-model-card.selected .modal-feature-tag {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, 
        var(--bg-secondary) 0%, 
        var(--bg-primary) 100%
    );
    border-top: 1px solid var(--border-color);
}

.modal-cancel-btn,
.modal-confirm-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.modal-cancel-btn {
    background: var(--bg-primary);
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
}

.modal-cancel-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--text-secondary);
    transform: translateY(-2px);
}

.modal-confirm-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
    border: 2px solid var(--primary-color);
}

.modal-confirm-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.modal-confirm-btn:disabled {
    background: var(--border-color);
    color: var(--text-secondary);
    cursor: not-allowed;
    border-color: var(--border-color);
    box-shadow: none;
    transform: none;
}

.modal-confirm-btn:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* 优势特长对比样式 */
.strengths-comparison {
    margin-top: 1rem;
}

.strengths-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.strength-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.strength-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.strength-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.strength-card-logo {
    width: 48px;
    height: 48px;
    border-radius: 0.75rem;
    object-fit: contain;
    background: white;
    padding: 0.5rem;
    border: 2px solid var(--border-color);
}

.strength-card-title h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.strength-card-title p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.strength-categories {
    display: grid;
    gap: 1rem;
}

.strength-category {
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    padding: 1rem;
    border-left: 4px solid var(--primary-color);
}

.strength-category-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.strength-score {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

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

.score-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
    border-radius: 4px;
    transition: width 0.3s ease;
}

.score-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
    min-width: 2rem;
}

.strength-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* API价格对比样式 */
.api-pricing-comparison {
    margin-top: 1rem;
}

.api-pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.api-pricing-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.api-pricing-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.api-pricing-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.api-pricing-logo {
    width: 48px;
    height: 48px;
    border-radius: 0.75rem;
    object-fit: contain;
    background: white;
    padding: 0.5rem;
    border: 2px solid var(--border-color);
}

.api-pricing-title h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.api-pricing-title p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.api-pricing-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.api-pricing-table th,
.api-pricing-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.api-pricing-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-primary);
}

.api-pricing-table td {
    color: var(--text-secondary);
}

.api-pricing-table .price-highlight {
    color: var(--primary-color);
    font-weight: 600;
}

.api-pricing-notes {
    margin-top: 1rem;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.api-pricing-unavailable {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
}

.api-pricing-unavailable .icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

/* 深色模式适配 */
@media (prefers-color-scheme: dark) {
    .model-select-card.selected .model-select-logo {
        background: var(--bg-secondary);
    }
    
    .pricing-card-logo,
    .audience-card-logo {
        background: var(--bg-secondary);
    }
    
    .selected-model-item {
        background: var(--bg-secondary);
        border-color: var(--border-color);
    }
    
    .selected-model-item:hover {
        background: var(--bg-primary);
    }
    
    .selected-models-panel {
        background: var(--bg-secondary);
    }
    
    .strength-card-logo,
    .api-pricing-logo {
        background: var(--bg-secondary);
    }
}

/* 加载动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.model-select-card,
.pricing-card,
.audience-card,
.chart-container {
    animation: fadeIn 0.3s ease-out;
}

/* 滚动条样式 */
.category-filter::-webkit-scrollbar,
.comparison-tabs::-webkit-scrollbar {
    height: 4px;
}

.category-filter::-webkit-scrollbar-track,
.comparison-tabs::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

.category-filter::-webkit-scrollbar-thumb,
.comparison-tabs::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

.category-filter::-webkit-scrollbar-thumb:hover,
.comparison-tabs::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}