UI 调整

src/App.tsx

@@ -196,7 +196,17 @@ function App() {
   }
 
   return (
-    <div className="app" style={{ maxWidth: '800px', margin: '0 auto', padding: '20px', fontFamily: 'Arial, sans-serif', backgroundColor: '#121212', color: '#e0e0e0', minHeight: '100vh' }}>
+    <div className="app" style={{ 
+      maxWidth: isMobile ? '100%' : '85%', 
+      minWidth: isMobile ? '100%' : '85%', 
+      width: isMobile ? '100%' : '85%', 
+      margin: '0 auto', 
+      padding: '20px', 
+      fontFamily: 'Arial, sans-serif', 
+      backgroundColor: '#121212', 
+      color: '#e0e0e0', 
+      minHeight: '100vh' 
+    }}>
       <h1 style={{ textAlign: 'center', color: '#f59e0b' }}>安全算法计算工具</h1>
       
       {/* 桌面端 Tab 选择 */}