diff --git a/certificate.html b/certificate.html
index 1b81159..79c20e8 100644
--- a/certificate.html
+++ b/certificate.html
@@ -348,35 +348,157 @@
     }
 
     #signatureCanvas {
-      border: 1px solid #ced4da;
-      border-radius: 4px;
-      background-color: #f8f9fa;
+      border: 2px solid #ced4da;
+      border-radius: 8px;
+      background-color: white;
       cursor: crosshair;
+      width: 100%;
+      height: 200px;
+      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
     }
 
     .signature-actions {
-      margin-top: 8px;
-      text-align: right;
+      margin-top: 12px;
+      display: flex;
+      justify-content: space-between;
+      align-items: center;
     }
 
     .signature-actions button {
-      padding: 6px 12px;
+      padding: 8px 16px;
       background-color: #6c757d;
       color: white;
       border: none;
       border-radius: 4px;
       font-size: 14px;
+      font-weight: 500;
       cursor: pointer;
+      transition: background-color 0.3s ease;
     }
 
     .signature-actions button:hover {
       background-color: #5a6268;
     }
 
+    .signature-actions .sign-hint {
+      font-size: 14px;
+      color: #666;
+    }
+
     /* 签名显示样式 */
     .signature-display img {
-      max-width: 200px;
-      max-height: 100px;
+      max-width: 250px;
+      max-height: 120px;
+      border: 1px solid #e0e0e0;
+      border-radius: 4px;
+      padding: 8px;
+      background-color: white;
+    }
+
+    /* 签名弹窗样式 */
+    .signature-modal {
+      display: none;
+      position: fixed;
+      top: 0;
+      left: 0;
+      width: 100%;
+      height: 100%;
+      background-color: rgba(0, 0, 0, 0.8);
+      z-index: 2000;
+      align-items: center;
+      justify-content: center;
+      padding: 20px;
+    }
+
+    .signature-modal.show {
+      display: flex;
+    }
+
+    .signature-modal-content {
+      background-color: white;
+      border-radius: 12px;
+      padding: 24px;
+      width: 90%;
+      max-width: 500px;
+      max-height: 80vh;
+      overflow: hidden;
+      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
+    }
+
+    .signature-modal-header {
+      display: flex;
+      justify-content: space-between;
+      align-items: center;
+      margin-bottom: 20px;
+    }
+
+    .signature-modal-header h3 {
+      font-size: 18px;
+      font-weight: 600;
+      color: #333;
+      margin: 0;
+    }
+
+    .signature-modal-close {
+      background: none;
+      border: none;
+      font-size: 24px;
+      color: #666;
+      cursor: pointer;
+    }
+
+    #signatureModalCanvas {
+      border: 2px solid #ced4da;
+      border-radius: 8px;
+      background-color: white;
+      cursor: crosshair;
+      width: 100%;
+      height: 300px;
+      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
+    }
+
+    .signature-modal-actions {
+      margin-top: 20px;
+      display: flex;
+      gap: 12px;
+    }
+
+    .signature-modal-actions button {
+      flex: 1;
+      padding: 12px;
+      border: none;
+      border-radius: 4px;
+      font-size: 16px;
+      font-weight: 500;
+      cursor: pointer;
+      transition: background-color 0.3s ease;
+    }
+
+    .signature-modal-actions .cancel-btn {
+      background-color: #6c757d;
+      color: white;
+    }
+
+    .signature-modal-actions .clear-btn {
+      background-color: #ffc107;
+      color: #212529;
+    }
+
+    .signature-modal-actions .confirm-btn {
+      background-color: #28a745;
+      color: white;
+    }
+
+    .signature-modal-actions .cancel-btn:hover {
+      background-color: #5a6268;
+    }
+
+    .signature-modal-actions .clear-btn:hover {
+      background-color: #e0a800;
+    }
+
+    .signature-modal-actions .confirm-btn:hover {
+      background-color: #218838;
     }
 
     /* 响应式设计 */
@@ -455,13 +577,30 @@
           <div class="form-group">
             <label>手写签名：</label>
             <div class="signature-container">
-              <canvas id="signatureCanvas" width="350" height="200"></canvas>
+              <canvas id="signatureCanvas" width="350" height="200" onclick="openSignatureModal()"></canvas>
               <div class="signature-actions">
+                <span class="sign-hint">点击签名区域开始签名</span>
                 <button type="button" onclick="clearSignature()">清除</button>
               </div>
             </div>
             <input type="hidden" id="signature" name="signature">
           </div>
+          
+          <!-- 签名弹窗 -->
+          <div class="signature-modal" id="signatureModal">
+            <div class="signature-modal-content">
+              <div class="signature-modal-header">
+                <h3>手写签名</h3>
+                <button type="button" class="signature-modal-close" onclick="closeSignatureModal()">&times;</button>
+              </div>
+              <canvas id="signatureModalCanvas" width="400" height="300"></canvas>
+              <div class="signature-modal-actions">
+                <button type="button" class="cancel-btn" onclick="closeSignatureModal()">取消</button>
+                <button type="button" class="clear-btn" onclick="clearModalSignature()">清除</button>
+                <button type="button" class="confirm-btn" onclick="confirmSignature()">确认</button>
+              </div>
+            </div>
+          </div>
           <div class="form-actions" style="margin-top: 20px;">
             <button type="submit" form="certificateForm" class="submit-btn">提交信息</button>
           </div>
@@ -481,6 +620,8 @@
   <script>
     // 签名画布相关变量
     let canvas, ctx, isDrawing = false;
+    // 弹窗签名画布相关变量
+    let modalCanvas, modalCtx, modalIsDrawing = false;
     
     // 获取或创建会话标识
     function getSessionId() {
@@ -616,6 +757,11 @@
             </div>
           </div>
         `;
+        
+        // 显示二维码
+        const sessionId = getSessionId();
+        const viewUrl = `http://8.137.125.67:3008/view.html?sessionId=${encodeURIComponent(sessionId)}`;
+        displayQRCodeOnPage(viewUrl);
       }
       
       container.innerHTML = html;
@@ -625,28 +771,189 @@
     
     // 初始化签名画布
     function initSignatureCanvas() {
+      // 初始化主画布
       canvas = document.getElementById('signatureCanvas');
-      if (!canvas) return;
+      if (canvas) {
+        ctx = canvas.getContext('2d');
+        ctx.strokeStyle = '#000';
+        ctx.lineWidth = 2;
+        ctx.lineCap = 'round';
+        ctx.lineJoin = 'round';
+        
+        // 清除画布
+        clearSignature();
+      }
       
-      ctx = canvas.getContext('2d');
-      ctx.strokeStyle = '#000';
-      ctx.lineWidth = 2;
-      ctx.lineCap = 'round';
-      ctx.lineJoin = 'round';
+      // 初始化弹窗画布
+      initModalSignatureCanvas();
+    }
+    
+    // 初始化弹窗签名画布
+    function initModalSignatureCanvas() {
+      modalCanvas = document.getElementById('signatureModalCanvas');
+      if (!modalCanvas) return;
+      
+      modalCtx = modalCanvas.getContext('2d');
+      modalCtx.strokeStyle = '#000';
+      modalCtx.lineWidth = 3; // 弹窗中使用更粗的线条
+      modalCtx.lineCap = 'round';
+      modalCtx.lineJoin = 'round';
       
       // 清除画布
-      clearSignature();
+      clearModalSignature();
       
       // 添加鼠标事件
-      canvas.addEventListener('mousedown', startDrawing);
-      canvas.addEventListener('mousemove', draw);
-      canvas.addEventListener('mouseup', stopDrawing);
-      canvas.addEventListener('mouseout', stopDrawing);
+      modalCanvas.addEventListener('mousedown', startModalDrawing);
+      modalCanvas.addEventListener('mousemove', drawModal);
+      modalCanvas.addEventListener('mouseup', stopModalDrawing);
+      modalCanvas.addEventListener('mouseout', stopModalDrawing);
       
       // 添加触摸事件（支持移动设备）
-      canvas.addEventListener('touchstart', startDrawingTouch);
-      canvas.addEventListener('touchmove', drawTouch);
-      canvas.addEventListener('touchend', stopDrawing);
+      modalCanvas.addEventListener('touchstart', startModalDrawingTouch);
+      modalCanvas.addEventListener('touchmove', drawModalTouch);
+      modalCanvas.addEventListener('touchend', stopModalDrawing);
+    }
+    
+    // 打开签名弹窗
+    function openSignatureModal() {
+      const modal = document.getElementById('signatureModal');
+      if (modal) {
+        modal.classList.add('show');
+        // 清除弹窗画布
+        clearModalSignature();
+        // 添加点击外部区域关闭弹窗的事件
+        setTimeout(() => {
+          modal.addEventListener('click', handleModalClick);
+        }, 100);
+      }
+    }
+    
+    // 处理弹窗点击事件
+    function handleModalClick(e) {
+      const modal = document.getElementById('signatureModal');
+      const modalContent = document.querySelector('.signature-modal-content');
+      // 如果点击的是弹窗外部区域，关闭弹窗
+      if (e.target === modal) {
+        closeSignatureModal();
+      }
+    }
+    
+    // 关闭签名弹窗
+    function closeSignatureModal() {
+      const modal = document.getElementById('signatureModal');
+      if (modal) {
+        // 移除点击事件监听器
+        modal.removeEventListener('click', handleModalClick);
+        modal.classList.remove('show');
+      }
+    }
+    
+    // 开始弹窗签名
+    function startModalDrawing(e) {
+      modalIsDrawing = true;
+      const rect = modalCanvas.getBoundingClientRect();
+      const x = e.clientX - rect.left;
+      const y = e.clientY - rect.top;
+      modalCtx.beginPath();
+      modalCtx.moveTo(x, y);
+    }
+    
+    // 弹窗签名
+    function drawModal(e) {
+      if (!modalIsDrawing) return;
+      const rect = modalCanvas.getBoundingClientRect();
+      const x = e.clientX - rect.left;
+      const y = e.clientY - rect.top;
+      modalCtx.lineTo(x, y);
+      modalCtx.stroke();
+    }
+    
+    // 停止弹窗签名
+    function stopModalDrawing() {
+      modalIsDrawing = false;
+    }
+    
+    // 触摸事件处理（弹窗）
+    function startModalDrawingTouch(e) {
+      e.preventDefault();
+      const touch = e.touches[0];
+      const mouseEvent = new MouseEvent('mousedown', {
+        clientX: touch.clientX,
+        clientY: touch.clientY
+      });
+      modalCanvas.dispatchEvent(mouseEvent);
+    }
+    
+    function drawModalTouch(e) {
+      e.preventDefault();
+      const touch = e.touches[0];
+      const mouseEvent = new MouseEvent('mousemove', {
+        clientX: touch.clientX,
+        clientY: touch.clientY
+      });
+      modalCanvas.dispatchEvent(mouseEvent);
+    }
+    
+    // 清除弹窗签名
+    function clearModalSignature() {
+      if (!modalCanvas || !modalCtx) return;
+      modalCtx.clearRect(0, 0, modalCanvas.width, modalCanvas.height);
+      // 填充背景色
+      modalCtx.fillStyle = '#f8f9fa';
+      modalCtx.fillRect(0, 0, modalCanvas.width, modalCanvas.height);
+    }
+    
+    // 确认签名
+    function confirmSignature() {
+      if (!modalCanvas) return;
+      
+      // 检查画布是否有内容
+      const imageData = modalCtx.getImageData(0, 0, modalCanvas.width, modalCanvas.height);
+      const data = imageData.data;
+      let hasContent = false;
+      
+      // 遍历像素数据，检查是否有非背景色的像素
+      for (let i = 0; i < data.length; i += 4) {
+        const r = data[i];
+        const g = data[i + 1];
+        const b = data[i + 2];
+        const a = data[i + 3];
+        
+        // 检查是否不是透明像素且不是背景色(#f8f9fa)
+        if (a > 0 && !(r === 248 && g === 249 && b === 250)) {
+          hasContent = true;
+          break;
+        }
+      }
+      
+      // 只有当画布有内容时才保存签名
+      if (hasContent) {
+        // 将弹窗画布内容复制到主画布
+        if (canvas && ctx) {
+          ctx.clearRect(0, 0, canvas.width, canvas.height);
+          ctx.fillStyle = '#f8f9fa';
+          ctx.fillRect(0, 0, canvas.width, canvas.height);
+          
+          // 调整比例，确保签名在主画布中合适显示
+          const scale = Math.min(canvas.width / modalCanvas.width, canvas.height / modalCanvas.height);
+          const offsetX = (canvas.width - modalCanvas.width * scale) / 2;
+          const offsetY = (canvas.height - modalCanvas.height * scale) / 2;
+          
+          ctx.save();
+          ctx.translate(offsetX, offsetY);
+          ctx.scale(scale, scale);
+          ctx.drawImage(modalCanvas, 0, 0);
+          ctx.restore();
+        }
+        
+        // 保存签名到隐藏字段
+        saveSignature();
+        
+        // 关闭弹窗
+        closeSignatureModal();
+      } else {
+        alert('请先进行签名');
+      }
     }
     
     function startDrawing(e) {
@@ -781,8 +1088,8 @@
             // 生成查看页面的URL，包含会话ID
             const viewUrl = `http://8.137.125.67:3008/view.html?sessionId=${encodeURIComponent(sessionId)}`;
             
-            // 生成二维码
-            generateQRCode(viewUrl);
+            // 生成二维码并在页面下方显示
+            displayQRCodeOnPage(viewUrl);
           } else {
             alert('没有找到可导出的信息');
           }
@@ -793,6 +1100,81 @@
         });
     }
     
+    // 在页面下方显示二维码
+    function displayQRCodeOnPage(url) {
+      // 检查是否已有二维码容器，如有则先移除
+      const existingContainer = document.getElementById('qrCodeDisplay');
+      if (existingContainer) {
+        existingContainer.remove();
+      }
+      
+      // 创建二维码容器
+      const qrContainer = document.createElement('div');
+      qrContainer.id = 'qrCodeDisplay';
+      qrContainer.style.cssText = `
+        margin: 20px 16px;
+        padding: 16px;
+        background-color: white;
+        border-radius: 8px;
+        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+        text-align: center;
+      `;
+      
+      // 创建二维码标题
+      const qrTitle = document.createElement('h3');
+      qrTitle.style.cssText = `
+        color: #28a745;
+        margin-bottom: 15px;
+        font-size: 18px;
+      `;
+      qrTitle.innerHTML = '📋 合格证二维码';
+      
+      // 创建二维码图片
+      const qrImage = document.createElement('img');
+      qrImage.id = 'qrCodeImage';
+      qrImage.style.cssText = `
+        max-width: 250px;
+        max-height: 250px;
+        margin-bottom: 15px;
+        background-color: white;
+        padding: 10px;
+        border-radius: 8px;
+        border: 1px solid #e0e0e0;
+      `;
+      
+      // 创建提示文字
+      const qrText = document.createElement('div');
+      qrText.style.cssText = `
+        color: #666;
+        font-size: 14px;
+        text-align: center;
+        line-height: 1.5;
+      `;
+      qrText.innerHTML = '<p style="margin-bottom: 8px;">扫描二维码查看完整信息</p><p>长按保存二维码</p>';
+      
+      // 使用Google Charts API生成二维码
+      const qrCodeUrl = `https://api.qrserver.com/v1/create-qr-code/?size=250x250&data=${encodeURIComponent(url)}`;
+      qrImage.src = qrCodeUrl;
+      
+      // 组装容器
+      qrContainer.appendChild(qrTitle);
+      qrContainer.appendChild(qrImage);
+      qrContainer.appendChild(qrText);
+      
+      // 找到合适的位置插入二维码容器
+      // 在support元素之前插入
+      const supportElement = document.querySelector('.support');
+      if (supportElement) {
+        supportElement.parentNode.insertBefore(qrContainer, supportElement);
+      } else {
+        // 如果没有support元素，就在container末尾插入
+        const container = document.querySelector('.container');
+        if (container) {
+          container.appendChild(qrContainer);
+        }
+      }
+    }
+    
     // 重置提交状态
     function resetSubmissionStatus() {
       const sessionId = getSessionId();
@@ -1014,6 +1396,11 @@
             sessionStorage.setItem('certificateSubmitted_' + sessionId, 'true');
             displayCertificate(data.certificate);
             alert('提交成功！合格证信息已保存到数据库。');
+            
+            // 提交成功后自动生成二维码
+            setTimeout(() => {
+              exportCertificate();
+            }, 1000);
           } else {
             // 无签名，标记为部分完成，保持可编辑状态
             sessionStorage.setItem('certificatePartiallyCompleted_' + sessionId, 'true');