diff --git a/index.html b/index.html
index 33758d3..04e9d85 100644
--- a/index.html
+++ b/index.html
@@ -65,7 +65,7 @@
       <div class="panel-header">
        <input type="date" id="entry-date">
         <button id="btn-speak-selected" title="朗读选中的文本">🔊 朗读</button>
-        <button id="btn-helper" title="输入中文，翻译后插入编辑区">🈶 中→西</button>
+        <button id="btn-helper" title="输入中文，翻译后插入编辑区">🤖 助手</button>
        <button id="btn-save">💾 保存</button>
       </div>
      <textarea id="entry-text" placeholder="用西班牙语写下今天的日记..." spellcheck="false"></textarea>
diff --git a/style.css b/style.css
index bb82a0c..0ea43aa 100644
--- a/style.css
+++ b/style.css
@@ -410,13 +410,15 @@ body {
   #mobile-menu-overlay.show { display: block; }
   #mobile-menu {
     position: absolute;
-    left: 0;
-    top: 0;
-    bottom: 0;
-    width: min(300px, 84vw);
+    left: 0.5rem;
+    top: 56px;
+    width: min(280px, 84vw);
+    max-height: calc(100vh - 72px);
     background: var(--panel-bg);
+    border: 1px solid var(--border);
+    border-radius: var(--radius);
     box-shadow: var(--shadow);
-    padding: 0.75rem;
+    padding: 0.6rem;
     overflow-y: auto;
   }
   .mobile-menu-head {