.knowledge-page{display:flex;flex-direction:column;height:100%;overflow:hidden}.knowledge-tabs{display:flex;gap:4px;padding:0 20px 12px;border-bottom:1px solid var(--border-color)}.tab-btn{padding:8px 20px;font-size:14px;font-weight:500;color:var(--text-secondary);background:transparent;border:none;border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);font-family:var(--font-sans)}.tab-btn:hover{color:var(--text-primary);background:var(--bg-card-hover)}.tab-btn.active{color:var(--accent-primary);background:#6366f11a}.knowledge-content{flex:1;overflow-y:auto;padding:20px}.upload-tab-content,.manage-tab-content{max-width:900px;margin:0 auto}.upload-card-full{padding:24px}.card-header-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.card-title{font-size:18px;font-weight:600;color:var(--text-primary);margin:0}.card-tag{font-size:12px;color:var(--text-muted);padding:4px 10px;background:var(--bg-input);border-radius:20px}.upload-form{display:flex;flex-direction:column;gap:20px}.form-row{display:flex;flex-direction:column;gap:8px}.form-label{font-size:13px;font-weight:500;color:var(--text-secondary)}.category-select-row{display:flex;flex-direction:column;gap:8px}.add-category-inline{display:flex;gap:8px;align-items:center}.category-chips{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.category-chip{display:inline-flex;align-items:center;gap:4px;padding:6px 10px;background:var(--bg-input);border-radius:var(--radius-md);font-size:13px;color:var(--text-primary)}.chip-delete{display:flex;align-items:center;justify-content:center;padding:2px;background:transparent;border:none;color:var(--text-muted);cursor:pointer;border-radius:4px;transition:var(--transition)}.chip-delete:hover{color:var(--danger);background:#ef444426}.text-muted{font-size:13px;color:var(--text-muted)}.upload-dropzone-large{border:2px dashed var(--border-color);border-radius:var(--radius-lg);padding:40px 24px;text-align:center;cursor:pointer;transition:var(--transition);display:flex;flex-direction:column;align-items:center;gap:12px}.upload-dropzone-large:hover,.upload-dropzone-large.active{border-color:var(--accent-primary);background:#6366f10d}.upload-dropzone-large.uploading{cursor:not-allowed}.upload-icon-large{width:64px;height:64px;border-radius:var(--radius-md);background:#6366f11a;color:var(--accent-primary);display:flex;align-items:center;justify-content:center}.manage-toolbar{margin-bottom:16px}.manage-collapse{display:flex;flex-direction:column;gap:12px}.collapse-group{overflow:hidden}.collapse-header{display:flex;align-items:center;gap:10px;padding:14px 16px;cursor:pointer;transition:var(--transition)}.collapse-header:hover{background:var(--bg-card-hover)}.collapse-icon{color:var(--text-muted);display:flex}.collapse-folder{color:var(--accent-primary);flex-shrink:0}.collapse-title{font-size:15px;font-weight:500;color:var(--text-primary);flex:1}.collapse-count{font-size:12px;padding:2px 8px;background:var(--bg-input);border-radius:12px;color:var(--text-muted)}.collapse-actions{display:flex;gap:8px}.collapse-actions .btn-sm{padding:4px 8px;font-size:12px}.collapse-actions .btn-danger{color:var(--danger)}.collapse-body{padding:0 16px 16px 44px;border-top:1px solid var(--border-color)}.collapse-empty{padding:16px 0;font-size:13px;color:var(--text-muted)}.manage-files-list{display:flex;flex-direction:column;gap:4px;padding-top:12px}.manage-file-row{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:var(--radius-sm);transition:var(--transition)}.manage-file-row:hover{background:var(--bg-card-hover)}.manage-file-row .file-icon-wrap{width:32px;height:32px}.manage-file-row .file-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.manage-file-row .file-meta{font-size:11px;color:var(--text-muted)}.manage-file-row .file-actions{opacity:1}.modal-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal-dialog{padding:24px;border-radius:var(--radius-lg);min-width:360px}.modal-dialog h3{font-size:16px;font-weight:600;margin:0 0 16px;color:var(--text-primary)}.modal-actions{display:flex;justify-content:flex-end;gap:12px;margin-top:20px}.upload-card{padding:16px;display:flex;flex-direction:column;gap:12px}.upload-category-row{display:flex;align-items:center;gap:10px}.upload-dropzone{border:2px dashed var(--border-color);border-radius:var(--radius-md);padding:24px 16px;text-align:center;cursor:pointer;transition:var(--transition);display:flex;flex-direction:column;align-items:center;gap:10px}.upload-dropzone:hover,.upload-dropzone.active{border-color:var(--accent-primary);background:#6366f10d}.upload-dropzone.uploading{border-color:var(--accent-primary);background:#6366f10d;cursor:not-allowed}.upload-icon{width:48px;height:48px;border-radius:var(--radius-md);background:#6366f11a;color:var(--accent-primary);display:flex;align-items:center;justify-content:center}.upload-text{display:flex;flex-direction:column;gap:2px}.upload-main{font-size:13px;font-weight:500;color:var(--text-primary)}.upload-sub{font-size:11px;color:var(--text-muted)}.upload-formats{display:flex;gap:6px;flex-wrap:wrap;justify-content:center}.upload-progress{display:flex;flex-direction:column;align-items:center;gap:10px;color:var(--accent-primary);font-size:13px}.spinner{width:20px;height:20px;border:2px solid var(--border-color);border-top-color:var(--accent-primary);border-radius:50%;animation:spin .8s linear infinite}.stats-card{padding:16px}.form-section-title{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--text-primary);margin-bottom:12px}.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.stat-item{display:flex;flex-direction:column;align-items:center;padding:10px;background:var(--bg-input);border-radius:var(--radius-sm);gap:2px}.stat-value{font-size:22px;font-weight:700;color:var(--text-primary);line-height:1}.stat-label{font-size:11px;color:var(--text-muted)}.category-card{padding:16px}.category-btn{display:flex;align-items:center;justify-content:space-between;width:100%;padding:8px 10px;background:transparent;border:none;border-radius:var(--radius-sm);color:var(--text-secondary);font-size:13px;cursor:pointer;transition:var(--transition);font-family:var(--font-sans);margin-bottom:2px}.category-btn:hover{background:var(--bg-card-hover);color:var(--text-primary)}.category-btn.active{background:#6366f11a;color:var(--accent-primary)}.category-count{font-size:11px;padding:1px 6px;background:var(--bg-card);border-radius:10px;color:var(--text-muted)}.knowledge-toolbar{display:flex;align-items:center;gap:12px}.search-wrap{flex:1;position:relative;display:flex;align-items:center;gap:8px}.search-icon{position:absolute;left:12px;color:var(--text-muted);pointer-events:none}.search-input{padding-left:36px;flex:1}.search-btn{flex-shrink:0}.knowledge-loading{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:var(--text-muted);font-size:13px}.generating-spinner{width:32px;height:32px;border:2px solid var(--border-color);border-top-color:var(--accent-primary);border-radius:50%;animation:spin .8s linear infinite}.files-grid{display:flex;flex-direction:column;gap:8px}.file-card{display:flex;align-items:center;gap:14px;padding:14px 16px;cursor:pointer;transition:var(--transition)}.file-card.selected{border-color:var(--accent-primary);background:#6366f10f}.file-icon-wrap{width:40px;height:40px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;flex-shrink:0}.file-info{flex:1;min-width:0}.file-name{font-size:13px;font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:5px}.file-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.file-size{font-size:11px;color:var(--text-muted)}.file-category{font-size:10px}.file-date{font-size:11px;color:var(--text-muted);margin-top:4px}.file-actions{display:flex;gap:6px;opacity:0;transition:opacity .2s}.file-card:hover .file-actions{opacity:1}.file-action-btn{padding:5px 8px}.knowledge-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:var(--text-muted);gap:12px}.knowledge-empty h3{font-size:16px;font-weight:600;color:var(--text-secondary)}.knowledge-empty p{font-size:13px}.file-preview-panel{position:fixed;right:20px;top:80px;bottom:20px;width:320px;border-radius:var(--radius-lg);display:flex;flex-direction:column;overflow:hidden;z-index:100;box-shadow:var(--shadow-lg)}.preview-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border-color)}.preview-header h3{font-size:14px;font-weight:600;color:var(--text-primary)}.preview-content{flex:1;overflow-y:auto;padding:16px 20px;display:flex;flex-direction:column;gap:16px}.preview-meta{display:flex;flex-direction:column;gap:8px}.preview-meta-item{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.meta-key{font-size:12px;color:var(--text-muted);flex-shrink:0}.meta-val{font-size:12px;color:var(--text-primary);text-align:right;word-break:break-all}.preview-text-area h4{font-size:13px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.preview-text-area p{font-size:12px;color:var(--text-secondary);line-height:1.6;background:var(--bg-input);padding:12px;border-radius:var(--radius-sm)}