diff --git a/css/style.css b/css/style.css
index 9425fea..e004ec2 100644
--- a/css/style.css
+++ b/css/style.css
@@ -806,6 +806,70 @@ body::before {
     justify-content: center;
 }
 
+/* ── 文件预览区域 ── */
+.file-preview {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 8px;
+    padding: 8px 0;
+}
+
+.file-chip {
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    padding: 5px 10px;
+    border-radius: 8px;
+    background: rgba(0, 245, 212, 0.06);
+    border: 1px solid rgba(0, 245, 212, 0.18);
+    font-size: 12px;
+    line-height: 1;
+    transition: var(--transition);
+    animation: fadeInUp 0.2s ease;
+}
+
+.file-chip:hover {
+    border-color: rgba(0, 245, 212, 0.35);
+    background: rgba(0, 245, 212, 0.1);
+}
+
+.file-icon {
+    font-size: 14px;
+    flex-shrink: 0;
+}
+
+.file-name {
+    font-weight: 600;
+    color: var(--text-primary);
+    max-width: 160px;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+.file-size {
+    color: var(--text-muted);
+    flex-shrink: 0;
+}
+
+.remove-file {
+    background: none;
+    border: none;
+    color: var(--text-muted);
+    cursor: pointer;
+    font-size: 15px;
+    line-height: 1;
+    padding: 0 2px;
+    border-radius: 4px;
+    transition: var(--transition);
+    flex-shrink: 0;
+}
+
+.remove-file:hover {
+    color: var(--accent-red);
+    background: rgba(239, 68, 68, 0.1);
+}
+
 .input-row {
     display: flex;
     align-items: flex-end;
diff --git a/index.html b/index.html
index ac5c8e4..717b958 100644
--- a/index.html
+++ b/index.html
@@ -95,14 +95,25 @@
     <!-- ═══════════════ 输入区域 ═══════════════ -->
     <div class="input-area" id="inputArea">
         <div class="image-preview" id="imagePreview" style="display:none;"></div>
+        <div class="file-preview" id="filePreview" style="display:none;"></div>
         <div class="input-row">
-            <button class="icon-btn attach-btn" id="btnAttach" title="上传图片">
+            <button class="icon-btn attach-btn" id="btnAttachImg" title="上传图片">
                 <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                     <rect x="3" y="3" width="18" height="18" rx="2" ry="2"/><circle cx="8.5" cy="8.5" r="1.5"/>
                     <polyline points="21 15 16 10 5 21"/>
                 </svg>
             </button>
+            <button class="icon-btn attach-btn" id="btnAttachFile" title="上传文件（文本/代码）">
+                <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                    <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/>
+                    <polyline points="14 2 14 8 20 8"/>
+                    <line x1="16" y1="13" x2="8" y2="13"/>
+                    <line x1="16" y1="17" x2="8" y2="17"/>
+                    <polyline points="10 9 9 9 8 9"/>
+                </svg>
+            </button>
             <input type="file" id="fileInput" accept="image/*" multiple style="display:none;">
+            <input type="file" id="textFileInput" accept=".txt,.md,.log,.csv,.py,.pyw,.js,.mjs,.cjs,.ts,.tsx,.jsx,.java,.c,.h,.cpp,.cc,.hpp,.go,.rs,.rb,.php,.sh,.bash,.zsh,.sql,.html,.htm,.css,.json,.jsonl,.xml,.svg,.yaml,.yml,.toml,.ini,.cfg,.conf,.swift,.kt,.kts,.scala,.lua,.r,.m,.cs,.fs,.ex,.exs,.erl,.hs,.clj,.lisp,.diff,.patch,Dockerfile,Makefile,.rst,.tsv,.vb,.pl,.mm,.pyi,.pyw,.fsharp,.makefile,.dockerfile" multiple style="display:none;">
             <textarea class="chat-input" id="chatInput" placeholder="输入消息..." rows="1"></textarea>
             <label class="think-toggle" id="thinkToggleWrap" title="Think 模式未可用">
                 <input type="checkbox" id="toggleThink" disabled>
diff --git a/js/components/input-area.js b/js/components/input-area.js
index f81151f..c176b0e 100644
--- a/js/components/input-area.js
+++ b/js/components/input-area.js
@@ -1,10 +1,10 @@
 /**
  * InputArea - 输入区域组件
- * 包含文本输入、图片上传、发送逻辑
+ * 包含文本输入、图片上传、文件上传、发送逻辑
  */
 
 import { state, KEYS } from '../state.js';
-import { fileToBase64, debounce, truncate } from '../utils.js';
+import { fileToBase64, fileToText, detectLanguage, debounce, truncate, escapeHtml, formatSize } from '../utils.js';
 import { getSelectedModel, isThinkEnabled } from './model-bar.js';
 import {
     renderMessages, appendAssistantPlaceholder, appendSystemMessage,
@@ -13,16 +13,43 @@ import {
 import { showToast } from './toast.js';
 import { checkConnection } from './header.js';
 
-let chatInputEl, btnSendEl, fileInputEl, imagePreviewEl;
+let chatInputEl, btnSendEl, fileInputEl, textFileInputEl, imagePreviewEl, filePreviewEl;
 let pendingImages = [];
+let pendingFiles = [];
+
+/** 常见文本/代码文件扩展名集合（用于校验） */
+const TEXT_EXTENSIONS = new Set([
+    'txt','md','markdown','rst','log','csv','tsv',
+    'py','pyw','pyi','js','mjs','cjs','ts','tsx','jsx',
+    'java','c','h','cpp','cc','cxx','hpp','go','rs','rb','php',
+    'sh','bash','zsh','fish','sql','html','htm','css',
+    'json','jsonl','xml','svg','yaml','yml','toml','ini','cfg','conf',
+    'swift','kt','kts','scala','lua','r','m','mm',
+    'cs','fs','vb','ex','exs','erl','hs','clj','lisp',
+    'diff','patch','pl','dockerfile','makefile'
+]);
+
+/** 最大文件大小 500KB */
+const MAX_FILE_SIZE = 500 * 1024;
+
+/** 判断是否为文本/代码文件 */
+function isTextFile(file) {
+    // 无扩展名的特殊文件名
+    const name = file.name.toLowerCase();
+    if (name === 'dockerfile' || name === 'makefile') return true;
+    const ext = name.split('.').pop();
+    return TEXT_EXTENSIONS.has(ext);
+}
 
 export function initInputArea() {
     chatInputEl = document.querySelector('#chatInput');
     btnSendEl = document.querySelector('#btnSend');
     fileInputEl = document.querySelector('#fileInput');
+    textFileInputEl = document.querySelector('#textFileInput');
     imagePreviewEl = document.querySelector('#imagePreview');
+    filePreviewEl = document.querySelector('#filePreview');
 
-    // 发送
+    // 发送 / 停止
     btnSendEl.addEventListener('click', () => {
         if (state.get(KEYS.IS_STREAMING)) {
             stopGeneration();
@@ -41,9 +68,16 @@ export function initInputArea() {
     chatInputEl.addEventListener('input', autoResizeTextarea);
 
     // 图片上传
-    document.querySelector('#btnAttach').addEventListener('click', () => fileInputEl.click());
+    document.querySelector('#btnAttachImg').addEventListener('click', () => fileInputEl.click());
     fileInputEl.addEventListener('change', (e) => {
-        handleFileSelect(e.target.files);
+        handleImageSelect(e.target.files);
+        e.target.value = '';
+    });
+
+    // 文件上传（文本/代码）
+    document.querySelector('#btnAttachFile').addEventListener('click', () => textFileInputEl.click());
+    textFileInputEl.addEventListener('change', (e) => {
+        handleTextFileSelect(e.target.files);
         e.target.value = '';
     });
 
@@ -55,6 +89,15 @@ export function initInputArea() {
             renderImagePreviews();
         }
     });
+
+    // 删除文件预览
+    filePreviewEl.addEventListener('click', (e) => {
+        if (e.target.classList.contains('remove-file')) {
+            const idx = parseInt(e.target.dataset.index);
+            pendingFiles.splice(idx, 1);
+            renderFilePreviews();
+        }
+    });
 }
 
 function autoResizeTextarea() {
@@ -62,16 +105,16 @@ function autoResizeTextarea() {
     chatInputEl.style.height = Math.min(chatInputEl.scrollHeight, 120) + 'px';
 }
 
-async function handleFileSelect(files) {
-    const maxSize = 20 * 1024 * 1024;
+// ── 图片处理 ──
 
+async function handleImageSelect(files) {
+    const maxSize = 20 * 1024 * 1024;
     for (const file of files) {
         if (!file.type.startsWith('image/')) continue;
         if (file.size > maxSize) {
             appendSystemMessage(`⚠️ 图片 ${file.name} 超过 20MB 限制`);
             continue;
         }
-
         try {
             const base64 = await fileToBase64(file);
             pendingImages.push({ name: file.name, base64 });
@@ -91,15 +134,66 @@ function renderImagePreviews() {
     imagePreviewEl.style.display = '';
     imagePreviewEl.innerHTML = pendingImages.map((img, i) => `
         <div class="preview-thumb">
-            <img src="data:image/png;base64,${img.base64}" alt="${img.name}">
+            <img src="data:image/png;base64,${img.base64}" alt="${escapeHtml(img.name)}">
             <button class="remove-img" data-index="${i}">×</button>
         </div>
     `).join('');
 }
 
+// ── 文件处理（文本/代码） ──
+
+async function handleTextFileSelect(files) {
+    for (const file of files) {
+        if (!isTextFile(file)) {
+            appendSystemMessage(`⚠️ ${file.name} 不是支持的文本/代码文件`);
+            continue;
+        }
+        if (file.size > MAX_FILE_SIZE) {
+            appendSystemMessage(`⚠️ ${file.name} 超过 500KB 限制（${formatSize(file.size)}）`);
+            continue;
+        }
+        // 重复检测
+        if (pendingFiles.some(f => f.name === file.name && f.size === file.size)) {
+            appendSystemMessage(`ℹ️ ${file.name} 已添加`);
+            continue;
+        }
+        try {
+            const content = await fileToText(file);
+            pendingFiles.push({
+                name: file.name,
+                content,
+                language: detectLanguage(file.name),
+                size: file.size
+            });
+            renderFilePreviews();
+        } catch (err) {
+            console.error('[InputArea] 文件读取失败:', err);
+            appendSystemMessage(`❌ 读取 ${file.name} 失败`);
+        }
+    }
+}
+
+function renderFilePreviews() {
+    if (pendingFiles.length === 0) {
+        filePreviewEl.style.display = 'none';
+        filePreviewEl.innerHTML = '';
+        return;
+    }
+    filePreviewEl.style.display = '';
+    filePreviewEl.innerHTML = pendingFiles.map((f, i) => `
+        <div class="file-chip">
+            <span class="file-icon">📄</span>
+            <span class="file-name">${escapeHtml(f.name)}</span>
+            <span class="file-size">${formatSize(f.size)}</span>
+            <button class="remove-file" data-index="${i}" title="移除">×</button>
+        </div>
+    `).join('');
+}
+
+// ── UI 状态 ──
+
 function updateSendButton(streaming) {
     if (streaming) {
-        // 流式时显示停止按钮
         btnSendEl.innerHTML = `<svg viewBox="0 0 24 24" fill="currentColor">
             <rect x="6" y="6" width="12" height="12" rx="2"/>
         </svg>`;
@@ -107,7 +201,6 @@ function updateSendButton(streaming) {
         btnSendEl.classList.remove('disabled');
         btnSendEl.title = '停止生成';
     } else {
-        // 恢复发送按钮
         btnSendEl.innerHTML = `<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
             <line x1="22" y1="2" x2="11" y2="13"/><polygon points="22 2 15 22 11 13 2 9 22 2"/>
         </svg>`;
@@ -118,7 +211,7 @@ function updateSendButton(streaming) {
 }
 
 /**
- * 停止生成 - 真正中止 Ollama 接口请求
+ * 停止生成
  */
 function stopGeneration() {
     const abortController = state.get(KEYS.ABORT_CONTROLLER);
@@ -132,7 +225,7 @@ function stopGeneration() {
  */
 export async function sendMessage() {
     const text = chatInputEl.value.trim();
-    if (!text && pendingImages.length === 0) return;
+    if (!text && pendingImages.length === 0 && pendingFiles.length === 0) return;
     if (state.get(KEYS.IS_STREAMING)) return;
 
     const model = getSelectedModel();
@@ -144,44 +237,69 @@ export async function sendMessage() {
     const currentSession = state.get(KEYS.CURRENT_SESSION);
     if (!currentSession) return;
 
-    // 构造用户消息
     const now = Date.now();
     const msgsToAdd = [];
 
+    // ── 构造用户消息内容 ──
+    // 场景1：有图片（Ollama 需要单独的 images 消息）
     if (pendingImages.length > 0) {
         msgsToAdd.push({
             role: 'user',
-            content: '',
+            content: pendingImages.length === 1
+                ? `[上传了图片: ${pendingImages[0].name}]`
+                : `[上传了 ${pendingImages.length} 张图片]`,
             images: pendingImages.map(img => img.base64),
             timestamp: now
         });
     }
 
-    if (text) {
+    // 场景2：有文本输入 + 文件，或者只有文件
+    if (text || pendingFiles.length > 0) {
+        let content = text || '';
+
+        // 把文件内容格式化为代码块拼入消息
+        if (pendingFiles.length > 0) {
+            const fileParts = pendingFiles.map(f => {
+                const lang = f.language || '';
+                return `📄 **${f.name}**\n\n\`\`\`${lang}\n${f.content}\n\`\`\``;
+            });
+
+            if (content) {
+                content += '\n\n---\n' + fileParts.join('\n\n---\n');
+            } else {
+                content = `请分析以下 ${pendingFiles.length > 1 ? pendingFiles.length + ' 个' : ''}文件：\n\n${fileParts.join('\n\n---\n')}`;
+            }
+        }
+
         msgsToAdd.push({
             role: 'user',
-            content: text,
+            content,
             timestamp: now
         });
     }
 
     // 更新会话标题
     if (currentSession.messages.length === 0) {
-        currentSession.title = truncate(text || '[图片消息]', 30);
+        const titleText = text
+            || (pendingFiles.length > 0 ? `[文件: ${pendingFiles.map(f => f.name).join(', ')}]` : '[图片消息]');
+        currentSession.title = truncate(titleText, 30);
         currentSession.model = model;
     }
 
     msgsToAdd.forEach(m => currentSession.messages.push(m));
     renderMessages();
 
-    // 立即保存（防止新建会话或刷新时丢失用户消息）
+    // 立即保存
     await saveCurrentSession();
 
     // 清空输入
     chatInputEl.value = '';
     pendingImages = [];
+    pendingFiles = [];
     imagePreviewEl.style.display = 'none';
     imagePreviewEl.innerHTML = '';
+    filePreviewEl.style.display = 'none';
+    filePreviewEl.innerHTML = '';
     autoResizeTextarea();
 
     // 助手占位
@@ -199,7 +317,6 @@ export async function sendMessage() {
     const systemPrompt = state.get(KEYS.SYSTEM_PROMPT);
     const numCtx = state.get(KEYS.NUM_CTX, 24576);
 
-    // 流式回复状态变量（声明在 try 外，catch 中也需要访问）
     let assistantContent = '';
     let thinkContent = '';
     let finalStats = null;
@@ -256,7 +373,6 @@ export async function sendMessage() {
     } catch (err) {
         console.error('[InputArea] 流式聊天错误:', err);
 
-        // 处理用户主动停止（AbortError）
         if (err.name === 'AbortError') {
             const placeholder = document.querySelector('#messagesContainer .message.assistant:last-child');
             const loadingDots = placeholder?.querySelector('.loading-dots');
@@ -266,7 +382,6 @@ export async function sendMessage() {
 
             const contentDiv = placeholder?.querySelector('.msg-content');
 
-            // 保存部分消息（直接用 assistantContent，不从 DOM 读）
             const partialMsg = {
                 role: 'assistant',
                 content: assistantContent,
@@ -277,7 +392,6 @@ export async function sendMessage() {
             };
             currentSession.messages.push(partialMsg);
 
-            // 更新 DOM
             if (contentDiv) {
                 let html = '';
                 if (assistantContent) {
@@ -296,7 +410,6 @@ export async function sendMessage() {
             return;
         }
 
-        // 其他错误
         const placeholder = document.querySelector('#messagesContainer .message.assistant:last-child');
         const loadingDots = placeholder?.querySelector('.loading-dots');
         const loadingText = placeholder?.querySelector('.loading-text');
diff --git a/js/utils.js b/js/utils.js
index bb9d03a..5bb86be 100644
--- a/js/utils.js
+++ b/js/utils.js
@@ -71,3 +71,44 @@ export function fileToBase64(file) {
         reader.readAsDataURL(file);
     });
 }
+
+/** File → 文本内容 */
+export function fileToText(file) {
+    return new Promise((resolve, reject) => {
+        const reader = new FileReader();
+        reader.onload = () => resolve(reader.result);
+        reader.onerror = reject;
+        reader.readAsText(file);
+    });
+}
+
+/** 根据文件名检测语言标识（用于 Markdown 代码块） */
+export function detectLanguage(filename) {
+    const ext = filename.split('.').pop().toLowerCase();
+    const map = {
+        py: 'python', pyw: 'python', pyi: 'python',
+        js: 'javascript', mjs: 'javascript', cjs: 'javascript',
+        ts: 'typescript', tsx: 'tsx', jsx: 'jsx',
+        java: 'java', class: 'java',
+        c: 'c', h: 'c',
+        cpp: 'cpp', cc: 'cpp', cxx: 'cpp', hpp: 'cpp',
+        go: 'go', rs: 'rust', rb: 'ruby', php: 'php',
+        sh: 'bash', bash: 'bash', zsh: 'bash', fish: 'bash',
+        sql: 'sql', html: 'html', htm: 'html', css: 'css',
+        json: 'json', jsonl: 'json',
+        xml: 'xml', svg: 'svg',
+        yaml: 'yaml', yml: 'yaml', toml: 'toml',
+        ini: 'ini', cfg: 'ini', conf: 'ini',
+        md: 'markdown', markdown: 'markdown', rst: 'rst',
+        txt: '', csv: 'csv', tsv: 'csv', log: '',
+        swift: 'swift', kt: 'kotlin', kts: 'kotlin',
+        scala: 'scala', lua: 'lua', pl: 'perl', r: 'r',
+        m: 'matlab', mm: 'objectivec',
+        cs: 'csharp', fs: 'fsharp', vb: 'vbnet',
+        ex: 'elixir', exs: 'elixir', erl: 'erlang',
+        hs: 'haskell', clj: 'clojure', lisp: 'lisp',
+        dockerfile: 'dockerfile', makefile: 'makefile',
+        diff: 'diff', patch: 'diff',
+    };
+    return map[ext] ?? ext;
+}