diff --git a/AIStudyApp/AIStudyApp/Core/Services/FileUploadService.swift b/AIStudyApp/AIStudyApp/Core/Services/FileUploadService.swift
index 45818f1..bc05c4c 100644
--- a/AIStudyApp/AIStudyApp/Core/Services/FileUploadService.swift
+++ b/AIStudyApp/AIStudyApp/Core/Services/FileUploadService.swift
@@ -8,32 +8,32 @@ class FileUploadService {
 
     /// 上传图片到 COS 并返回文件 ID
     func uploadImage(_ image: UIImage, filename: String = "avatar.jpg") async throws -> String {
-        // 压缩为 JPEG，最大 512KB
         guard let imageData = image.jpegData(compressionQuality: 0.7) else {
             throw FileUploadError.compressFailed
         }
+        return try await uploadData(imageData, filename: filename, mimeType: "image/jpeg")
+    }
 
-        // 请求预签名上传 URL
+    /// 上传原始数据到 COS 并返回文件 ID
+    func uploadData(_ data: Data, filename: String, mimeType: String) async throws -> String {
         let urlReq = FileUploadUrlRequest(
             filename: filename,
-            mimeType: "image/jpeg",
-            sizeBytes: imageData.count
+            mimeType: mimeType,
+            sizeBytes: data.count
         )
         let urlResp: FileUploadUrlResponse = try await client.request(
             "/files/upload-url", method: "POST", body: urlReq
         )
 
-        // 直接 PUT 到 COS
         var request = URLRequest(url: URL(string: urlResp.uploadUrl)!)
         request.httpMethod = "PUT"
-        request.setValue("image/jpeg", forHTTPHeaderField: "Content-Type")
-        request.httpBody = imageData
+        request.setValue(mimeType, forHTTPHeaderField: "Content-Type")
+        request.httpBody = data
         let (_, response) = try await URLSession.shared.data(for: request)
         guard let httpResp = response as? HTTPURLResponse, httpResp.statusCode == 200 else {
             throw FileUploadError.uploadFailed
         }
 
-        // 确认上传
         let confirmResp: FileConfirmUploadResponse = try await client.request(
             "/files/complete", method: "POST",
             body: FileConfirmUploadRequest(objectKey: urlResp.objectKey, checksum: nil)
diff --git a/AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift b/AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift
index f540001..cdaa69c 100644
--- a/AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift
+++ b/AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift
@@ -108,17 +108,246 @@ struct ZXCardRow: View { let icon: String; let title: String; let desc: String;
 
 struct AddKnowledgePage: View {
     let knowledgeBaseId: String
-    @State private var title = ""; @State private var content = ""
+    @Environment(\.dismiss) private var dismiss
+    @State private var title = ""
+    @State private var content = ""
+    @State private var sourceType: SourceType = .manual
+    @State private var selectedFileURL: URL?
+    @State private var selectedFileName = ""
+    @State private var selectedFileData: Data?
+    @State private var isUploading = false
+    @State private var isSaving = false
+    @State private var showFilePicker = false
+    @State private var showPhotoPicker = false
+    @State private var selectedPhotoItem: PhotosPickerItem?
+
+    enum SourceType: String, CaseIterable { case manual = "手写", file = "文件" }
+
     var body: some View {
         ZStack { Color.zxBg0.ignoresSafeArea(); VStack(spacing: 0) {
             ScrollView { VStack(spacing: 16) {
-                VStack(alignment: .leading, spacing: 8) { Text("标题").font(.system(size: 12, weight: .semibold)).foregroundColor(Color.zxF035); TextField("输入知识点标题", text: $title).font(.system(size: 15)).tint(Color.zxPurple).padding(.horizontal, 16).frame(height: 52).background(Color.zxFill004).clipShape(RoundedRectangle(cornerRadius: 14)).overlay(RoundedRectangle(cornerRadius: 14).stroke(Color.zxBorder008, lineWidth: 1)) }
-                VStack(alignment: .leading, spacing: 8) { Text("内容").font(.system(size: 12, weight: .semibold)).foregroundColor(Color.zxF035); TextEditor(text: $content).frame(minHeight: 200).scrollContentBackground(.hidden).padding(12).background(Color.zxFill004).clipShape(RoundedRectangle(cornerRadius: 14)).overlay(RoundedRectangle(cornerRadius: 14).stroke(Color.zxBorder008, lineWidth: 1)) }
+                // 标题
+                VStack(alignment: .leading, spacing: 8) {
+                    Text("标题").font(.system(size: 12, weight: .semibold)).foregroundColor(Color.zxF035)
+                    TextField("输入知识点标题", text: $title).font(.system(size: 15)).tint(Color.zxPurple)
+                        .padding(.horizontal, 16).frame(height: 52)
+                        .background(Color.zxFill004).clipShape(RoundedRectangle(cornerRadius: 14))
+                        .overlay(RoundedRectangle(cornerRadius: 14).stroke(Color.zxBorder008, lineWidth: 1))
+                }
+
+                // 内容来源选择
+                VStack(alignment: .leading, spacing: 8) {
+                    Text("内容来源").font(.system(size: 12, weight: .semibold)).foregroundColor(Color.zxF035)
+                    Picker("", selection: $sourceType) {
+                        ForEach(SourceType.allCases, id: \.self) { t in Text(t.rawValue).tag(t) }
+                    }
+                    .pickerStyle(.segmented)
+                }
+
+                // 内容区
+                switch sourceType {
+                case .manual:
+                    VStack(alignment: .leading, spacing: 8) {
+                        Text("内容").font(.system(size: 12, weight: .semibold)).foregroundColor(Color.zxF035)
+                        TextEditor(text: $content)
+                            .frame(minHeight: 200).scrollContentBackground(.hidden).padding(12)
+                            .background(Color.zxFill004).clipShape(RoundedRectangle(cornerRadius: 14))
+                            .overlay(RoundedRectangle(cornerRadius: 14).stroke(Color.zxBorder008, lineWidth: 1))
+                    }
+
+                case .file:
+                    VStack(spacing: 10) {
+                        // 文件选择按钮
+                        HStack(spacing: 8) {
+                            Button { showFilePicker = true } label: {
+                                HStack {
+                                    Image(systemName: "doc.badge.plus")
+                                    Text("选择文件")
+                                }
+                                .font(.system(size: 14, weight: .medium))
+                                .foregroundColor(Color.zxPrimary)
+                                .frame(maxWidth: .infinity).frame(height: 48)
+                                .background(Color.zxPrimarySoft)
+                                .clipShape(RoundedRectangle(cornerRadius: 12))
+                            }
+                            Button { showPhotoPicker = true } label: {
+                                HStack {
+                                    Image(systemName: "photo.on.rectangle")
+                                    Text("图片")
+                                }
+                                .font(.system(size: 14, weight: .medium))
+                                .foregroundColor(Color.zxAccent)
+                                .frame(maxWidth: .infinity).frame(height: 48)
+                                .background(Color.zxAccent.opacity(0.1))
+                                .clipShape(RoundedRectangle(cornerRadius: 12))
+                            }
+                        }
+
+                        // 已选文件
+                        if !selectedFileName.isEmpty {
+                            HStack(spacing: 8) {
+                                Image(systemName: fileIcon).foregroundColor(Color.zxGreen)
+                                Text(selectedFileName).font(.system(size: 13)).foregroundColor(Color.zxF0).lineLimit(1)
+                                Spacer()
+                                Text(formatFileSize).font(.system(size: 11)).foregroundColor(Color.zxF04)
+                            }
+                            .padding(12).background(Color.zxFill004)
+                            .clipShape(RoundedRectangle(cornerRadius: 12))
+                            .overlay(RoundedRectangle(cornerRadius: 12).stroke(Color.zxBorder008, lineWidth: 1))
+                        }
+
+                        // 支持格式
+                        Text("支持 Markdown、TXT、PDF、图片（JPEG/PNG）")
+                            .font(.system(size: 11)).foregroundColor(Color.zxF04)
+                    }
+
+                    if isUploading {
+                        HStack(spacing: 8) {
+                            ProgressView()
+                            Text("上传中...").font(.system(size: 13)).foregroundColor(Color.zxF04)
+                        }
+                    }
+                }
+
+                // 保存按钮
                 Button {
-                    Task { _ = try? await KnowledgeItemService.shared.create(knowledgeBaseId: knowledgeBaseId, title: title, content: content.isEmpty ? nil : content) }
-                } label: { Text("保存").font(.system(size: 14, weight: .bold)).foregroundColor(.white).frame(maxWidth: .infinity).frame(height: 52).background(ZXGradient.ctaPurple).clipShape(RoundedRectangle(cornerRadius: 16)) }
+                    Task { await save() }
+                } label: {
+                    HStack(spacing: 8) {
+                        if isSaving { ProgressView().tint(.white) }
+                        Text("保存").font(.system(size: 14, weight: .bold))
+                    }
+                    .foregroundColor(.white).frame(maxWidth: .infinity).frame(height: 52)
+                    .background(canSave ? ZXGradient.ctaPurple : Color.zxHairlineStrong)
+                    .clipShape(RoundedRectangle(cornerRadius: 16))
+                }
+                .disabled(!canSave || isSaving)
             }.padding(.horizontal, 20).padding(.top, 8).padding(.bottom, 80) }.scrollIndicators(.hidden) }
-        }.navigationBarTitleDisplayMode(.inline).toolbarBackground(.hidden, for: .navigationBar)}
+        }
+        .navigationBarTitleDisplayMode(.inline).toolbarBackground(.hidden, for: .navigationBar)
+        .fileImporter(isPresented: $showFilePicker, allowedContentTypes: [.plainText, .pdf, .image], allowsMultipleSelection: false) { result in
+            if case .success(let urls) = result, let url = urls.first { handleFile(url) }
+        }
+        .photosPicker(isPresented: $showPhotoPicker, selection: $selectedPhotoItem, matching: .images)
+        .onChange(of: selectedPhotoItem) { _, item in
+            guard let item else { return }
+            Task { await handlePhoto(item) }
+        }
+    }
+
+    // MARK: - Helpers
+
+    private var fileIcon: String {
+        let ext = selectedFileName.lowercased()
+        if ext.hasSuffix(".md") || ext.hasSuffix(".markdown") { return "doc.richtext" }
+        if ext.hasSuffix(".txt") { return "doc.plaintext" }
+        if ext.hasSuffix(".pdf") { return "doc.fill" }
+        if ext.hasSuffix(".jpg") || ext.hasSuffix(".jpeg") || ext.hasSuffix(".png") || ext.hasSuffix(".heic") { return "photo" }
+        return "doc"
+    }
+
+    private var formatFileSize: String {
+        let size = selectedFileData?.count ?? 0
+        if size < 1024 { return "\(size) B" }
+        if size < 1024 * 1024 { return "\(size / 1024) KB" }
+        return String(format: "%.1f MB", Double(size) / 1024 / 1024)
+    }
+
+    private var canSave: Bool {
+        guard !title.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty else { return false }
+        switch sourceType {
+        case .manual: return !content.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
+        case .file: return selectedFileData != nil && !isUploading
+        }
+    }
+
+    private func handleFile(_ url: URL) {
+        guard url.startAccessingSecurityScopedResource() else { return }
+        defer { url.stopAccessingSecurityScopedResource() }
+        guard let data = try? Data(contentsOf: url) else { return }
+        selectedFileURL = url
+        selectedFileName = url.lastPathComponent
+        selectedFileData = data
+    }
+
+    private func handlePhoto(_ item: PhotosPickerItem) async {
+        guard let data = try? await item.loadTransferable(type: Data.self),
+              let image = UIImage(data: data) else { return }
+        // 压缩大图
+        let compressed: Data
+        if data.count > 2 * 1024 * 1024 {
+            compressed = image.jpegData(compressionQuality: 0.6) ?? data
+        } else {
+            compressed = data
+        }
+        selectedFileData = compressed
+        selectedFileName = "image_\(Int(Date().timeIntervalSince1970)).jpg"
+        selectedFileURL = nil
+        selectedPhotoItem = nil
+    }
+
+    private func save() async {
+        isSaving = true
+        defer { isSaving = false }
+
+        do {
+            let finalContent: String?
+            let finalType: String?
+
+            switch sourceType {
+            case .manual:
+                finalContent = content
+                finalType = "manual"
+
+            case .file:
+                guard let data = selectedFileData else { return }
+                isUploading = true
+                defer { isUploading = false }
+
+                let mime = mimeType
+                let fileId: String
+                if let image = UIImage(data: data) {
+                    fileId = try await FileUploadService.shared.uploadImage(image, filename: selectedFileName)
+                } else {
+                    fileId = try await FileUploadService.shared.uploadData(data, filename: selectedFileName, mimeType: mime)
+                }
+                let downloadUrl = try await FileUploadService.shared.getDownloadUrl(fileId: fileId)
+                finalContent = downloadUrl
+                finalType = fileType
+            }
+
+            _ = try await KnowledgeItemService.shared.create(
+                knowledgeBaseId: knowledgeBaseId,
+                title: title,
+                content: finalContent,
+                itemType: finalType
+            )
+            ZXToastManager.shared.success("知识点已添加")
+            dismiss()
+        } catch {
+            ZXToastManager.shared.error("添加失败: \(error.localizedDescription)")
+        }
+    }
+
+    private var fileType: String {
+        let ext = selectedFileName.lowercased()
+        if ext.hasSuffix(".md") || ext.hasSuffix(".markdown") { return "markdown" }
+        if ext.hasSuffix(".txt") { return "text" }
+        if ext.hasSuffix(".pdf") { return "pdf" }
+        if ext.hasSuffix(".jpg") || ext.hasSuffix(".jpeg") || ext.hasSuffix(".png") || ext.hasSuffix(".heic") { return "image" }
+        return "file"
+    }
+
+    private var mimeType: String {
+        let ext = selectedFileName.lowercased()
+        if ext.hasSuffix(".md") || ext.hasSuffix(".markdown") { return "text/markdown" }
+        if ext.hasSuffix(".txt") { return "text/plain" }
+        if ext.hasSuffix(".pdf") { return "application/pdf" }
+        if ext.hasSuffix(".jpg") || ext.hasSuffix(".jpeg") { return "image/jpeg" }
+        if ext.hasSuffix(".png") { return "image/png" }
+        if ext.hasSuffix(".heic") { return "image/heic" }
+        return "application/octet-stream"
+    }
 }
 
 struct KnowledgeDetailPage: View {