diff --git a/renderer/index.html b/renderer/index.html
index 3724dfa..a15bda2 100644
--- a/renderer/index.html
+++ b/renderer/index.html
@@ -144,6 +144,40 @@
       <div id="preview-panel">
         <div id="preview" class="markdown-body"></div>
       </div>
+
+      <!-- Welcome screen -->
+      <div id="welcome-screen">
+        <div class="welcome-content">
+          <div class="welcome-icon">
+            <svg width="80" height="80" viewBox="0 0 100 100" fill="none" xmlns="http://www.w3.org/2000/svg">
+              <rect x="10" y="5" width="80" height="90" rx="8" fill="#f0f6ff" stroke="#1a73e8" stroke-width="2"/>
+              <text x="50" y="45" text-anchor="middle" fill="#1a73e8" font-family="system-ui" font-weight="bold" font-size="32">M↓</text>
+              <text x="50" y="70" text-anchor="middle" fill="#5f6368" font-family="system-ui" font-size="12">MarkLite</text>
+            </svg>
+          </div>
+          <h1>欢迎使用 MarkLite</h1>
+          <p>一款轻量级的 Markdown 阅读器</p>
+          <div class="welcome-actions">
+            <button id="btn-welcome-open" class="welcome-btn primary">
+              <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+                <path d="M22 19a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h5l2 3h9a2 2 0 0 1 2 2z"></path>
+              </svg>
+              打开文件
+            </button>
+            <button id="btn-welcome-new" class="welcome-btn secondary">
+              <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+                <line x1="12" y1="5" x2="12" y2="19"></line>
+                <line x1="5" y1="12" x2="19" y2="12"></line>
+              </svg>
+              新建文件
+            </button>
+          </div>
+          <div class="welcome-tips">
+            <p>💡 提示：可以直接拖拽 .md 文件到窗口打开</p>
+            <p>⌨️ 快捷键：Ctrl+O 打开 | Ctrl+S 保存 | Ctrl+F 搜索 | Ctrl+H 替换 | Ctrl+1/2/3 视图 | Ctrl+T 标签</p>
+          </div>
+        </div>
+      </div>
     </div>
     </div>
 
@@ -172,40 +206,6 @@
         <p>释放文件以打开</p>
       </div>
     </div>
-
-    <!-- Welcome screen -->
-    <div id="welcome-screen">
-      <div class="welcome-content">
-        <div class="welcome-icon">
-          <svg width="80" height="80" viewBox="0 0 100 100" fill="none" xmlns="http://www.w3.org/2000/svg">
-            <rect x="10" y="5" width="80" height="90" rx="8" fill="#f0f6ff" stroke="#1a73e8" stroke-width="2"/>
-            <text x="50" y="45" text-anchor="middle" fill="#1a73e8" font-family="system-ui" font-weight="bold" font-size="32">M↓</text>
-            <text x="50" y="70" text-anchor="middle" fill="#5f6368" font-family="system-ui" font-size="12">MarkLite</text>
-          </svg>
-        </div>
-        <h1>欢迎使用 MarkLite</h1>
-        <p>一款轻量级的 Markdown 阅读器</p>
-        <div class="welcome-actions">
-          <button id="btn-welcome-open" class="welcome-btn primary">
-            <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
-              <path d="M22 19a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h5l2 3h9a2 2 0 0 1 2 2z"></path>
-            </svg>
-            打开文件
-          </button>
-          <button id="btn-welcome-new" class="welcome-btn secondary">
-            <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
-              <line x1="12" y1="5" x2="12" y2="19"></line>
-              <line x1="5" y1="12" x2="19" y2="12"></line>
-            </svg>
-            新建文件
-          </button>
-        </div>
-        <div class="welcome-tips">
-          <p>💡 提示：可以直接拖拽 .md 文件到窗口打开</p>
-          <p>⌨️ 快捷键：Ctrl+O 打开 | Ctrl+S 保存 | Ctrl+F 搜索 | Ctrl+H 替换 | Ctrl+1/2/3 视图 | Ctrl+T 标签</p>
-        </div>
-      </div>
-    </div>
   </div>
 
   <script src="../lib/marked.min.js"></script>
diff --git a/renderer/style.css b/renderer/style.css
index 8d14ffc..bda7d05 100644
--- a/renderer/style.css
+++ b/renderer/style.css
@@ -66,7 +66,6 @@ html, body {
   display: flex;
   flex-direction: column;
   height: 100vh;
-  position: relative;
 }
 
 /* ===== Toolbar ===== */
@@ -311,6 +310,7 @@ html, body {
   display: flex;
   overflow: hidden;
   position: relative;
+  min-width: 0;
 }
 
 /* ===== Editor Panel ===== */