/* ========== 企业知识库 ========== */
.knowledge-page {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* 顶部工具栏 */
.knowledge-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

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

.filter-select {
    padding: 8px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px;
    color: var(--text-primary);
    background: var(--bg-card);
    cursor: pointer;
    min-width: 130px;
}

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

.filter-input {
    padding: 8px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px;
    color: var(--text-primary);
    background: var(--bg-card);
    min-width: 200px;
}

.filter-input:focus {
    border-color: var(--primary);
}

/* 上传区域 */
.upload-zone {
    border: 2px dashed var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    background: var(--bg-card);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.upload-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-zone:hover .upload-icon {
    color: var(--primary);
}

.upload-title {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.upload-hint {
    font-size: 13px;
    color: var(--text-secondary);
}

.upload-formats {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 8px;
}

/* 知识库布局 */
.knowledge-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 20px;
}

/* 分类树 */
.category-tree {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.category-tree-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.category-tree-body {
    padding: 8px;
}

.category-item {
    padding: 9px 12px;
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 2px;
}

.category-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.category-item.active {
    background: var(--primary-bg);
    color: var(--primary);
    font-weight: 500;
}

.category-count {
    margin-left: auto;
    font-size: 12px;
    color: var(--text-muted);
    background: var(--bg-body);
    padding: 1px 8px;
    border-radius: 10px;
}

.category-item.active .category-count {
    background: var(--primary);
    color: var(--text-white);
}

.category-sub {
    padding-left: 28px;
}

.cat-toggle {
    transition: transform 0.2s;
    flex-shrink: 0;
    cursor: pointer;
}

.cat-toggle.expanded {
    transform: rotate(90deg);
}

.category-children {
    overflow: hidden;
}

.category-group {
    margin-bottom: 1px;
}

/* 文档列表 */
.doc-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.doc-item {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: 18px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}

.doc-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.doc-file-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-white);
}

.doc-file-icon.pdf { background: #EF4444; }
.doc-file-icon.doc { background: #2563EB; }
.doc-file-icon.xls { background: #10B981; }
.doc-file-icon.ppt { background: #F59E0B; }
.doc-file-icon.img { background: #8B5CF6; }
.doc-file-icon.txt { background: #6B7280; }

.doc-info {
    flex: 1;
    min-width: 0;
}

.doc-name {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.doc-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 12px;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.doc-meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.doc-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.doc-actions {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
}

.doc-action-btn {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition);
    border: 1px solid transparent;
}

.doc-action-btn:hover {
    background: var(--bg-body);
    border-color: var(--border-color);
    color: var(--primary);
}

.doc-action-btn.danger:hover {
    color: var(--danger);
}

/* AI 分类状态 */
.ai-classify-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 500;
}

.ai-classify-badge.auto {
    background: var(--info-bg);
    color: var(--info);
}

.ai-classify-badge.manual {
    background: var(--warning-bg);
    color: var(--warning);
}

/* 文档预览 */
.doc-preview-modal .modal-body {
    padding: 0;
}

.preview-content {
    padding: 24px;
    max-height: 60vh;
    overflow-y: auto;
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-primary);
}

.preview-section {
    margin-bottom: 20px;
}

.preview-section-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border-color);
}

.preview-section-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}