diff --git a/frontend/admin.html b/frontend/admin.html
index 9b94aaa..8cf60d9 100644
--- a/frontend/admin.html
+++ b/frontend/admin.html
@@ -455,7 +455,7 @@
         </div>
     </div>
 
-    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/vue@3/dist/vue.global.js"></script>
     <script>
         const { createApp } = Vue;
 
diff --git a/frontend/css/style.css b/frontend/css/style.css
index 9240f25..76ccc76 100644
--- a/frontend/css/style.css
+++ b/frontend/css/style.css
@@ -32,6 +32,7 @@ html, body {
 
 #app {
     height: 100vh;
+    height: 100dvh; /* iOS Safari 动态视口高度 */
     display: flex;
     align-items: center;
     justify-content: center;
@@ -43,7 +44,7 @@ html, body {
     width: 100%;
     max-width: 900px;
     height: 100%;
-    max-height: 900px;
+    max-height: min(900px, calc(100vh - 40px));
     display: flex;
     flex-direction: column;
     background: var(--bg-secondary);
@@ -157,10 +158,10 @@ html, body {
     border-radius: 50%;
     background: var(--accent);
     box-shadow: 0 0 8px var(--accent);
-    animation: pulse 2s ease-in-out infinite;
+    animation: statusPulse 2s ease-in-out infinite;
 }
 
-@keyframes pulse {
+@keyframes statusPulse {
     0%, 100% { opacity: 1; }
     50% { opacity: 0.4; }
 }
@@ -185,7 +186,7 @@ html, body {
 
 .welcome-icon {
     margin-bottom: 20px;
-    opacity: 0.3;
+    opacity: 0.6;
 }
 
 .welcome-icon svg {
@@ -224,7 +225,7 @@ html, body {
     padding: 10px 16px;
     background: rgba(255, 255, 255, 0.03);
     border: 1px solid rgba(255, 255, 255, 0.1);
-    border-radius: 6px;
+    border-radius: 4px;
     color: var(--text-secondary);
     font-size: 13px;
     cursor: pointer;
@@ -427,7 +428,7 @@ html, body {
     padding: 16px 20px;
     background: rgba(0, 255, 65, 0.05);
     border: 1px solid rgba(0, 255, 65, 0.2);
-    border-radius: 6px;
+    border-radius: 4px;
 }
 
 .share-image-question-label {
@@ -670,7 +671,7 @@ html, body {
     cursor: pointer;
     transition: all 0.2s;
     padding: 4px 8px;
-    border-radius: 4px;
+    border-radius: 2px;
 }
 
 .contact-link:hover {
@@ -759,6 +760,8 @@ html, body {
 @media (max-width: 768px) {
     #app {
         padding: 0;
+        height: 100vh;
+        height: 100dvh;
     }
 
     .container {
@@ -820,10 +823,10 @@ html, body {
     justify-content: center;
     z-index: 10000;
     padding: 20px;
-    animation: fadeIn 0.2s ease;
+    animation: modalFadeIn 0.2s ease;
 }
 
-@keyframes fadeIn {
+@keyframes modalFadeIn {
     from {
         opacity: 0;
     }
@@ -896,14 +899,14 @@ html, body {
     justify-content: center;
     z-index: 10000;
     padding: 20px;
-    animation: fadeIn 0.2s ease;
+    animation: modalFadeIn 0.2s ease;
 }
 
 .contact-modal-content {
     position: relative;
     background: var(--bg-primary);
     border: 1px solid var(--border-bright);
-    border-radius: 8px;
+    border-radius: 4px;
     padding: 32px;
     max-width: 400px;
     width: 100%;
@@ -918,7 +921,7 @@ html, body {
     height: 32px;
     background: transparent;
     border: 1px solid var(--border);
-    border-radius: 4px;
+    border-radius: 2px;
     color: var(--text-secondary);
     cursor: pointer;
     display: flex;
@@ -955,7 +958,7 @@ html, body {
     padding: 12px;
     background: var(--bg-secondary);
     border: 1px solid var(--border);
-    border-radius: 6px;
+    border-radius: 4px;
     color: var(--text-secondary);
     font-size: 14px;
 }
@@ -976,7 +979,7 @@ html, body {
     padding: 12px;
     background: var(--accent-dim);
     border: 1px solid var(--accent);
-    border-radius: 6px;
+    border-radius: 4px;
     color: var(--accent);
     font-size: 14px;
     font-weight: 500;
diff --git a/frontend/index.html b/frontend/index.html
index aee8047..60fc689 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -38,7 +38,7 @@
                         <span class="model-name">{{ currentModel.name }}</span>
                     </div>
                     <!-- Logout Button -->
-                    <button class="logout-btn" @click="logout" title="登出">
+                    <button class="logout-btn" @click="logout" title="登出" aria-label="登出">
                         <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                             <path d="M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4"/>
                             <polyline points="16 17 21 12 16 7"/>
@@ -87,14 +87,14 @@
 
                                 <!-- Action Buttons for AI Messages (只在流式输出完成后显示) -->
                                 <div v-if="!msg.streaming" class="message-actions">
-                                    <button class="action-btn" @click.stop="copyMessage(msg.content)" title="复制内容">
+                                    <button class="action-btn" @click.stop="copyMessage(msg.content)" title="复制内容" aria-label="复制内容">
                                         <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                                             <rect x="9" y="9" width="13" height="13" rx="2" ry="2"/>
                                             <path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"/>
                                         </svg>
                                         <span>复制</span>
                                     </button>
-                                    <button class="action-btn" @click.stop="generateShareImage(msg.content, index)" title="生成分享图">
+                                    <button class="action-btn" @click.stop="generateShareImage(msg.content, index)" title="生成分享图" aria-label="生成分享图">
                                         <svg width="16" height="16" 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"/>
@@ -153,9 +153,9 @@
         </div>
 
         <!-- Image Modal -->
-        <div v-if="showImageModal" class="image-modal" @click="closeImageModal">
+        <div v-if="showImageModal" class="image-modal" @click="closeImageModal" role="dialog" aria-modal="true" aria-label="分享图预览">
             <div class="image-modal-content" @click.stop>
-                <button class="modal-close-btn" @click="closeImageModal" title="关闭">
+                <button class="modal-close-btn" @click="closeImageModal" title="关闭" aria-label="关闭分享图">
                     <svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                         <line x1="18" y1="6" x2="6" y2="18"/>
                         <line x1="6" y1="6" x2="18" y2="18"/>
@@ -167,9 +167,9 @@
         </div>
 
         <!-- Contact Modal -->
-        <div v-if="showContactModal" class="contact-modal" @click="showContactModal = false">
+        <div v-if="showContactModal" class="contact-modal" @click="showContactModal = false" role="dialog" aria-modal="true" aria-label="联系作者">
             <div class="contact-modal-content" @click.stop>
-                <button class="modal-close-btn" @click="showContactModal = false" title="关闭">
+                <button class="modal-close-btn" @click="showContactModal = false" title="关闭" aria-label="关闭联系方式">
                     <svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                         <line x1="18" y1="6" x2="6" y2="18"/>
                         <line x1="6" y1="6" x2="18" y2="18"/>
@@ -197,10 +197,10 @@
     </div>
 
     <!-- Vue 3 -->
-    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/vue@3/dist/vue.global.js"></script>
 
     <!-- Lightweight Charts -->
-    <script src="https://unpkg.com/lightweight-charts/dist/lightweight-charts.standalone.production.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/lightweight-charts/dist/lightweight-charts.standalone.production.js"></script>
 
     <!-- html2canvas for generating share images -->
     <script src="https://cdn.jsdelivr.net/npm/html2canvas@1.4.1/dist/html2canvas.min.js"></script>
diff --git a/frontend/js/app.js b/frontend/js/app.js
index cad7a24..195fe8c 100644
--- a/frontend/js/app.js
+++ b/frontend/js/app.js
@@ -25,6 +25,13 @@ createApp({
         this.sessionId = this.generateSessionId();
         this.autoResizeTextarea();
         this.loadModels();
+
+        // 键盘 Escape 关闭模态框
+        document.addEventListener('keydown', this.handleKeydown);
+    },
+
+    beforeUnmount() {
+        document.removeEventListener('keydown', this.handleKeydown);
     },
     methods: {
         checkAuth() {
@@ -40,6 +47,13 @@ createApp({
             }
         },
 
+        handleKeydown(e) {
+            if (e.key === 'Escape') {
+                if (this.showImageModal) this.closeImageModal();
+                else if (this.showContactModal) this.showContactModal = false;
+            }
+        },
+
         logout() {
             localStorage.removeItem('token');
             window.location.href = '/static/login.html';
diff --git a/frontend/login.html b/frontend/login.html
index 5b62370..14b9e6d 100644
--- a/frontend/login.html
+++ b/frontend/login.html
@@ -221,7 +221,7 @@
         </div>
     </div>
 
-    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/vue@3/dist/vue.global.js"></script>
     <script>
         const { createApp } = Vue;
 
diff --git a/frontend/real-trading.html b/frontend/real-trading.html
index 5a40c80..2a70a75 100644
--- a/frontend/real-trading.html
+++ b/frontend/real-trading.html
@@ -633,8 +633,8 @@
         </div>
     </div>
 
-    <script src="https://unpkg.com/vue@3/dist/vue.global.prod.js"></script>
-    <script src="https://unpkg.com/axios/dist/axios.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/vue@3/dist/vue.global.prod.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script>
     <script>
         console.log('[DEBUG] Vue global:', typeof Vue);
         console.log('[DEBUG] Vue.createApp:', typeof Vue?.createApp);
diff --git a/frontend/signals.html b/frontend/signals.html
index 75d1532..a6f9caa 100644
--- a/frontend/signals.html
+++ b/frontend/signals.html
@@ -657,7 +657,7 @@
         </div>
     </div>
 
-    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/vue@3/dist/vue.global.js"></script>
     <script>
         const { createApp } = Vue;
 
diff --git a/frontend/trading.html b/frontend/trading.html
index 2b8280b..08e0628 100644
--- a/frontend/trading.html
+++ b/frontend/trading.html
@@ -1689,8 +1689,8 @@
         </div>
     </div>
 
-    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
-    <script src="https://html2canvas.hertzen.com/dist/html2canvas.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/vue@3/dist/vue.global.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/html2canvas@1.4.1/dist/html2canvas.min.js"></script>
     <script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.1/dist/chart.umd.min.js"></script>
     <script src="https://cdn.jsdelivr.net/npm/chartjs-adapter-date-fns@3.0.0/dist/chartjs-adapter-date-fns.bundle.min.js"></script>
     <script>