/* AI搜索区域样式 - 新增 */
.ai-search-area-optimized {
    margin-bottom: 25px;
}

.ai-search-card-optimized {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    padding: 30px;
    color: white;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.ai-search-header-optimized {
    display: flex;
    align-items: center;
    margin-bottom: 25px;
}

.ai-icon-optimized {
    font-size: 40px;
    margin-right: 15px;
    opacity: 0.9;
}

.ai-title-optimized h3 {
    font-size: 24px;
    font-weight: 700;
    margin: 0 0 5px 0;
    color: white;
}

.ai-title-optimized p {
    margin: 0;
    opacity: 0.9;
    font-size: 14px;
}

.ai-search-form-optimized {
    margin-bottom: 20px;
}

.ai-input-group-optimized {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.ai-input-optimized {
    flex: 1;
    padding: 15px 20px;
    border: none;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.5;
    resize: vertical;
    min-height: 60px;
    background: rgba(255, 255, 255, 0.95);
    transition: all 0.3s ease;
}

.ai-input-optimized:focus {
    outline: none;
    background: white;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.ai-search-btn-optimized {
    padding: 15px 25px;
    background: #ff6b6b;
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.ai-search-btn-optimized:hover {
    background: #ff5252;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 107, 107, 0.4);
}

.ai-search-btn-optimized:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* 快捷问题样式 */
.quick-questions-optimized {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.quick-label-optimized {
    font-size: 14px;
    opacity: 0.9;
    white-space: nowrap;
}

.quick-buttons-optimized {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.quick-btn-optimized {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.quick-btn-optimized:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}

/* AI回答区域样式 */
.ai-response-area-optimized {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 20px;
    margin-top: 20px;
    backdrop-filter: blur(10px);
}

/* AI回复内容样式 */
.ai-response-content {
    white-space: pre-wrap;
    line-height: 1.6;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.95);
    margin-top: 10px;
}

.ai-response-header-optimized {
    margin-bottom: 15px;
}

.ai-thinking-optimized {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    opacity: 0.9;
}

.ai-response-content-optimized {
    font-size: 14px;
    line-height: 1.6;
}

.ai-matched-courses-optimized {
    margin-top: 15px;
}

.ai-course-item-optimized {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 10px;
    border-left: 4px solid #ff6b6b;
}

.ai-course-header-optimized {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 8px;
}

.ai-course-title-optimized {
    font-weight: 600;
    font-size: 15px;
    margin: 0;
}

.ai-course-category-optimized {
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
}

.ai-course-details-optimized {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    font-size: 13px;
    opacity: 0.9;
}

.ai-no-results-optimized {
    text-align: center;
    padding: 20px;
    opacity: 0.8;
}

/* ========== 以下是原有的表格样式，必须保留 ========== */

/* 筛选区域样式 */
.filter-area-optimized {
    background: white;
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.filter-row-optimized {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

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

.filter-label-optimized {
    font-weight: 600;
    color: #333;
    font-size: 14px;
    white-space: nowrap;
}

.filter-select-optimized {
    padding: 10px 15px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    background: white;
    font-size: 14px;
    min-width: 150px;
    transition: all 0.3s ease;
    line-height: 1.4;
    height: 42px;
}

.filter-select-optimized:focus {
    border-color: #667eea;
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.filter-input-optimized {
    padding: 10px 15px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 14px;
    min-width: 200px;
    transition: all 0.3s ease;
    line-height: 1.4;
    height: 42px;
}

.filter-input-optimized:focus {
    border-color: #667eea;
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

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

.range-input-optimized {
    width: 80px;
    padding: 8px 12px;
    border: 2px solid #e9ecef;
    border-radius: 6px;
    text-align: center;
    font-size: 14px;
    line-height: 1.4;
    height: 38px;
}

.range-separator-optimized {
    color: #666;
    font-weight: 600;
}

.filter-button-optimized {
    padding: 10px 25px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    height: 42px;
}

.filter-button-optimized:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.reset-button-optimized {
    padding: 10px 20px;
    background: #6c757d;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    height: 42px;
}

.reset-button-optimized:hover {
    background: #5a6268;
}

/* 表格优化样式 */
.cart-area-optimized {
    background: #f8f9fa;
}

.custome-container-optimized {
    max-width: 1600px;
    width: 100%;
}

.table-content-optimized {
    background: white;
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    margin-bottom: 20px;
}

.table-responsive-optimized {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    background: white;
    border-radius: 15px;
}

.table-optimized {
    margin-bottom: 0;
    table-layout: fixed;
    width: 100%;
    border-collapse: collapse;
    min-width: 1000px;
    background: white;
}

/* 表头样式 */
.table-optimized th {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: 600;
    padding: 18px 10px;
    border: none;
    font-size: 14px;
    text-align: center;
    position: relative;
    white-space: nowrap;
}

.table-optimized th:after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 20px;
    background: rgba(255, 255, 255, 0.3);
}

.table-optimized th:last-child:after {
    display: none;
}

/* 表格单元格样式 */
.table-optimized td {
    padding: 15px 10px;
    border-bottom: 1px solid #f0f0f0;
    vertical-align: top;
    text-align: center;
    transition: all 0.3s ease;
    background: white;
    font-size: 12px;
    font-weight: normal;
}

.table-optimized tbody tr:last-child td {
    border-bottom: none;
}

.table-optimized tbody tr:hover td {
    background: #f8f9ff;
}

/* 复选框样式 */
.product-checkbox-optimized {
    width: 60px;
}

.course-checkbox-optimized {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #667eea;
}

/* 文本截断样式 */
.text-truncate-1-optimized {
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.4;
    word-break: break-all;
    max-height: 1.4em;
    font-size: 12px;
    font-weight: normal;
}

.text-truncate-2-optimized {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.4;
    word-break: break-all;
    max-height: 2.8em;
    font-size: 12px;
    font-weight: normal;
}

/* 可点击查看完整内容的样式 */
.text-with-tooltip {
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    font-size: 12px;
    font-weight: normal;
}

.text-with-tooltip:hover {
    color: #667eea;
}

.text-with-tooltip::after {
    content: "🔍";
    font-size: 10px;
    margin-left: 4px;
    opacity: 0.6;
}

/* 底部操作区域 */
.table-footer-optimized {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    flex-wrap: wrap;
    gap: 15px;
}

/* 左侧按钮组 */
.footer-left-optimized {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* 全选和下载按钮 */
.footer-button-optimized {
    padding: 10px 20px;
    background: white;
    color: #333;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-button-optimized:hover {
    background: #f8f9fa;
    border-color: #667eea;
    color: #667eea;
}

.footer-button-optimized.download-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
}

.footer-button-optimized.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

/* 分页样式 */
.pagination-optimized {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 auto;
}

.page-item-optimized {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    background: white;
    color: #333;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.page-item-optimized:hover {
    border-color: #667eea;
    color: #667eea;
}

.page-item-optimized.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: #667eea;
}

.page-item-optimized.disabled {
    background: #f8f9fa;
    color: #6c757d;
    cursor: not-allowed;
    border-color: #e9ecef;
}

.page-item-optimized.disabled:hover {
    background: #f8f9fa;
    color: #6c757d;
    border-color: #e9ecef;
}

/* 右侧总计信息 */
.footer-right-optimized {
    display: flex;
    align-items: center;
    font-size: 14px;
    color: #666;
    font-weight: 600;
}

/* 模态框样式 */
.tooltip-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    animation: fadeIn 0.3s ease;
}

.tooltip-modal.active {
    display: flex;
}

.tooltip-content {
    background: white;
    padding: 30px;
    border-radius: 15px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    animation: slideUp 0.3s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.tooltip-close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #666;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.tooltip-close:hover {
    background: #f0f0f0;
    color: #333;
}

.tooltip-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #333;
    padding-right: 40px;
}

.tooltip-text {
    font-size: 14px;
    line-height: 1.6;
    color: #666;
}

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

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

/* 列宽设置 */
.product-thumbnail-optimized {
    width: 100px;
}

.product-name-optimized {
    width: 120px;
}

.product-dprice-optimized {
    width: 240px;
}

.product-quantity-optimized {
    width: 100px;
}

.product-subtotal-optimized {
    width: 240px;
}

.product-duration-optimized {
    width: 100px;
}

.product-tag-optimized {
    width: 50px;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .custome-container-optimized {
        max-width: 100%;
        padding: 0 15px;
    }
}

@media (max-width: 991px) {
    .filter-row-optimized {
        gap: 15px;
    }
    
    .filter-group-optimized {
        flex: 1;
        min-width: 200px;
    }
    
    .table-optimized th,
    .table-optimized td {
        padding: 12px 8px;
        font-size: 12px;
    }
    
    .table-optimized th {
        font-size: 13px;
    }
    
    .product-name-optimized {
        width: 100px;
    }
    
    .product-dprice-optimized,
    .product-subtotal-optimized {
        width: 200px;
    }
    
    .product-tag-optimized {
        width: 40px;
    }
}

@media (max-width: 768px) {
    .filter-area-optimized {
        padding: 20px;
    }
    
    .filter-row-optimized {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }
    
    .filter-group-optimized {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-label-optimized {
        margin-bottom: 5px;
    }
    
    .filter-select-optimized,
    .filter-input-optimized,
    .filter-button-optimized,
    .reset-button-optimized {
        width: 100%;
        min-width: auto;
    }
    
    .filter-range-optimized {
        justify-content: space-between;
    }
    
    .range-input-optimized {
        flex: 1;
    }
    
    .table-content-optimized {
        border-radius: 10px;
        padding: 15px;
        margin: 0;
    }
    
    .table-optimized {
        min-width: 900px;
    }
    
    .table-optimized th,
    .table-optimized td {
        padding: 10px 6px;
        font-size: 12px;
    }
    
    .table-optimized th {
        font-size: 12px;
    }
    
    .product-thumbnail-optimized {
        width: 80px;
    }
    
    .product-name-optimized {
        width: 90px;
    }
    
    .product-dprice-optimized {
        width: 180px;
    }
    
    .product-quantity-optimized {
        width: 80px;
    }
    
    .product-subtotal-optimized {
        width: 180px;
    }
    
    .product-duration-optimized {
        width: 80px;
    }
    
    .product-tag-optimized {
        width: 35px;
    }
    
    /* 移动端底部布局 */
    .table-footer-optimized {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    
    .footer-left-optimized {
        justify-content: center;
        order: 2;
    }
    
    .pagination-optimized {
        order: 1;
        margin: 0 0 15px 0;
    }
    
    .footer-right-optimized {
        order: 3;
        justify-content: center;
        margin-top: 15px;
    }
    
    .tooltip-content {
        padding: 20px;
        margin: 20px;
    }
}

@media (max-width: 480px) {
    .table-optimized th,
    .table-optimized td {
        padding: 8px 4px;
        font-size: 11px;
    }
    
    .cart-area-optimized {
        padding: 60px 0;
    }
    
    .table-content-optimized {
        padding: 10px;
        border-radius: 0;
    }
    
    .footer-left-optimized {
        flex-direction: column;
        width: 100%;
    }
    
    .footer-button-optimized {
        width: 100%;
        justify-content: center;
    }
}

/* 水平滚动提示 */
.table-scroll-hint {
    text-align: center;
    color: #666;
    font-size: 12px;
    margin-top: 10px;
    padding: 8px;
    background: #f8f9fa;
    border-radius: 4px;
    display: none;
}

@media (max-width: 768px) {
    .table-scroll-hint {
        display: block;
    }
}

/* 确保滚动条可见 */
.table-responsive-optimized::-webkit-scrollbar {
    height: 8px;
}

.table-responsive-optimized::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.table-responsive-optimized::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

.table-responsive-optimized::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* AI功能的响应式设计 */
@media (max-width: 768px) {
    .ai-search-card-optimized {
        padding: 20px;
        border-radius: 15px;
    }
    
    .ai-search-header-optimized {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .ai-icon-optimized {
        margin-right: 0;
        font-size: 35px;
    }
    
    .ai-input-group-optimized {
        flex-direction: column;
    }
    
    .ai-search-btn-optimized {
        justify-content: center;
    }
    
    .quick-questions-optimized {
        flex-direction: column;
        align-items: stretch;
    }
    
    .quick-buttons-optimized {
        justify-content: center;
    }
    
    .ai-course-details-optimized {
        grid-template-columns: 1fr;
    }
}

/* 打字机效果 */
.typing-effect {
    border-right: 2px solid white;
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { border-color: white; }
    51%, 100% { border-color: transparent; }
}
/* 分页省略号样式 */
.page-item-optimized.ellipsis {
    background: transparent !important;
    border: none !important;
    color: #666;
    min-width: 30px;
}

/* 分页容器 */
.pagination-optimized {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
    max-width: 100%;
    overflow: hidden;
}

/* 分页项 */
.page-item-optimized {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    background: white;
    color: #333;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.page-item-optimized:hover {
    border-color: #667eea;
    color: #667eea;
}

.page-item-optimized.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: #667eea;
}

/* 省略号样式 */
.page-item-optimized.ellipsis {
    background: transparent;
    border: none;
    color: #666;
    cursor: default;
    pointer-events: none;
    min-width: 30px;
}

/* 移动端优化 */
@media (max-width: 768px) {
    .pagination-optimized {
        gap: 4px;
    }
    
    .page-item-optimized {
        min-width: 36px;
        height: 36px;
        padding: 0 8px;
        font-size: 13px;
    }
}

/* AI搜索区域样式 */
.ai-search-area-optimized {
    margin-bottom: 25px;
}

.ai-search-card-optimized {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    padding: 30px;
    color: white;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.ai-search-header-optimized {
    display: flex;
    align-items: center;
    margin-bottom: 25px;
}

.ai-icon-optimized {
    font-size: 40px;
    margin-right: 15px;
    opacity: 0.9;
}

.ai-title-optimized h3 {
    font-size: 24px;
    font-weight: 700;
    margin: 0 0 5px 0;
    color: white;
}

.ai-title-optimized p {
    margin: 0;
    opacity: 0.9;
    font-size: 14px;
}

.ai-search-form-optimized {
    margin-bottom: 20px;
}

.ai-input-group-optimized {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.ai-input-optimized {
    flex: 1;
    padding: 15px 20px;
    border: none;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.5;
    resize: vertical;
    min-height: 60px;
    background: rgba(255, 255, 255, 0.95);
    transition: all 0.3s ease;
}

.ai-input-optimized:focus {
    outline: none;
    background: white;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.ai-search-btn-optimized {
    padding: 15px 25px;
    background: #ff6b6b;
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.ai-search-btn-optimized:hover {
    background: #ff5252;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 107, 107, 0.4);
}

.ai-search-btn-optimized:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* 快捷问题样式 */
.quick-questions-optimized {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.quick-label-optimized {
    font-size: 14px;
    opacity: 0.9;
    white-space: nowrap;
}

.quick-buttons-optimized {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.quick-btn-optimized {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.quick-btn-optimized:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}
/* AI课程项复选框样式 */
.ai-course-checkbox-optimized {
    margin-right: 10px;
}

.ai-course-checkbox-optimized input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: #ff6b6b;
}

/* AI下载操作区域 */
.ai-download-actions-optimized {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.ai-select-all-optimized {
    display: flex;
    align-items: center;
    gap: 8px;
    color: white;
    font-size: 14px;
    cursor: pointer;
}

.ai-download-btn-optimized {
    padding: 8px 20px;
    background: #ff6b6b;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.ai-download-btn-optimized:hover {
    background: #ff5252;
    transform: translateY(-2px);
}

.ai-download-btn-optimized:disabled {
    background: #6c757d;
    cursor: not-allowed;
    transform: none;
}

/* 复选框列 */
.ai-course-checkbox-column {
    display: flex;
    align-items: flex-start;
    padding-top: 2px;
}

/* AI回答区域样式 */
.ai-response-area-optimized {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 20px;
    margin-top: 20px;
    backdrop-filter: blur(10px);
}

.ai-response-header-optimized {
    margin-bottom: 15px;
}

.ai-thinking-optimized {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    opacity: 0.9;
}

.ai-response-content-optimized {
    font-size: 14px;
    line-height: 1.6;
}

.ai-matched-courses-optimized {
    margin-top: 15px;
}

.ai-course-item-optimized {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 10px;
    border-left: 4px solid #ff6b6b;
    color: white;
    display: grid;
    grid-template-columns: auto 1fr 2fr 1fr; /* 修改：新增复选框列 */
    gap: 15px;
    align-items: start;
}

/* 左侧信息列 */
.ai-course-left-optimized {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ai-course-title-optimized {
    font-weight: 700;
    font-size: 16px;
    margin: 0;
    color: white;
    line-height: 1.3;
}

.ai-course-instructor-optimized {
    font-size: 13px;
    opacity: 0.9;
    color: rgba(255, 255, 255, 0.9);
}

.ai-course-duration-optimized {
    font-size: 13px;
    opacity: 0.9;
    color: rgba(255, 255, 255, 0.9);
    background: rgba(255, 255, 255, 0.1);
    padding: 4px 8px;
    border-radius: 6px;
    display: inline-block;
    width: fit-content;
}

/* 中间介绍列 */
.ai-course-content-optimized {
    font-size: 14px;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.9);
    max-height: 80px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
}

/* 右侧分类列 */
.ai-course-right-optimized {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
}

.ai-course-category-optimized {
    background: rgba(255, 255, 255, 0.25);
    padding: 6px 12px;
    border-radius: 15px;
    font-size: 12px;
    color: white;
    font-weight: 600;
    text-align: center;
    min-width: 80px;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .ai-course-item-optimized {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .ai-course-checkbox-column {
        order: 1; /* 新增 */
    }
    
    .ai-course-left-optimized {
        order: 2;
    }
    
    .ai-course-content-optimized {
        order: 3;
    }
    
    .ai-course-right-optimized {
        order: 4;
    }
    
    .ai-download-actions-optimized {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .ai-search-card-optimized {
        padding: 20px;
        border-radius: 15px;
    }
    
    .ai-search-header-optimized {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .ai-icon-optimized {
        margin-right: 0;
        font-size: 35px;
    }
    
    .ai-input-group-optimized {
        flex-direction: column;
    }
    
    .ai-search-btn-optimized {
        justify-content: center;
    }
    
    .quick-questions-optimized {
        flex-direction: column;
        align-items: stretch;
    }
    
    .quick-buttons-optimized {
        justify-content: center;
    }
    
    .ai-course-details-optimized {
        grid-template-columns: 1fr;
    }
}

/* 打字机效果 */
.typing-effect {
    border-right: 2px solid white;
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { border-color: white; }
    51%, 100% { border-color: transparent; }
}

/* 原有的表格样式保持不变 */
/* ... 原有的所有CSS样式 ... */