diff --git a/it0_app/assets/icons/logo.svg b/it0_app/assets/icons/logo.svg
index 0ca9fd0..73e7be7 100644
--- a/it0_app/assets/icons/logo.svg
+++ b/it0_app/assets/icons/logo.svg
@@ -1,7 +1,4 @@
 <svg width="400" height="400" viewBox="0 0 400 400" fill="none" xmlns="http://www.w3.org/2000/svg">
-  <!-- Background -->
-  <rect width="400" height="400" fill="#ffffff"/>
-
   <!-- Antenna stick -->
   <line x1="200" y1="88" x2="200" y2="58" stroke="#3CC98C" stroke-width="7" stroke-linecap="round"/>
   <!-- Antenna ball -->
diff --git a/it0_app/lib/features/auth/presentation/pages/login_page.dart b/it0_app/lib/features/auth/presentation/pages/login_page.dart
index 999b8d5..9888f81 100644
--- a/it0_app/lib/features/auth/presentation/pages/login_page.dart
+++ b/it0_app/lib/features/auth/presentation/pages/login_page.dart
@@ -24,81 +24,134 @@ class _LoginPageState extends ConsumerState<LoginPage> {
     return Scaffold(
       backgroundColor: AppColors.background,
       body: Center(
-        child: Padding(
-          padding: const EdgeInsets.all(32),
+        child: SingleChildScrollView(
+          padding: const EdgeInsets.symmetric(horizontal: 32, vertical: 48),
           child: Form(
             key: _formKey,
-            child: Column(
-              mainAxisAlignment: MainAxisAlignment.center,
-              children: [
-                SvgPicture.asset(
-                  'assets/icons/logo.svg',
-                  width: 100,
-                  height: 100,
-                ),
-                const SizedBox(height: 8),
-                const Text(
-                  'Operations Intelligent Agent',
-                  style: TextStyle(color: AppColors.textSecondary),
-                ),
-                const SizedBox(height: 48),
-                TextFormField(
-                  controller: _emailController,
-                  keyboardType: TextInputType.emailAddress,
-                  decoration: const InputDecoration(
-                    labelText: 'Email',
-                    prefixIcon: Icon(Icons.email),
+            child: ConstrainedBox(
+              constraints: const BoxConstraints(maxWidth: 360),
+              child: Column(
+                mainAxisAlignment: MainAxisAlignment.center,
+                children: [
+                  SvgPicture.asset(
+                    'assets/icons/logo.svg',
+                    width: 96,
+                    height: 96,
                   ),
-                  validator: (value) {
-                    if (value == null || value.isEmpty) {
-                      return 'Please enter your email';
-                    }
-                    if (!value.contains('@')) {
-                      return 'Please enter a valid email';
-                    }
-                    return null;
-                  },
-                ),
-                const SizedBox(height: 16),
-                TextFormField(
-                  controller: _passwordController,
-                  obscureText: true,
-                  decoration: const InputDecoration(
-                    labelText: 'Password',
-                    prefixIcon: Icon(Icons.lock),
+                  const SizedBox(height: 12),
+                  const Text(
+                    'iAgent',
+                    style: TextStyle(
+                      color: AppColors.textPrimary,
+                      fontSize: 28,
+                      fontWeight: FontWeight.bold,
+                      letterSpacing: 2,
+                    ),
+                  ),
+                  const SizedBox(height: 4),
+                  const Text(
+                    '服务器集群运维智能体',
+                    style: TextStyle(
+                      color: AppColors.textSecondary,
+                      fontSize: 14,
+                    ),
+                  ),
+                  const SizedBox(height: 48),
+                  TextFormField(
+                    controller: _emailController,
+                    keyboardType: TextInputType.emailAddress,
+                    decoration: const InputDecoration(
+                      labelText: '邮箱',
+                      hintText: 'user@example.com',
+                      prefixIcon: Icon(Icons.email_outlined),
+                    ),
+                    validator: (value) {
+                      if (value == null || value.isEmpty) {
+                        return '请输入邮箱地址';
+                      }
+                      if (!value.contains('@')) {
+                        return '请输入有效的邮箱地址';
+                      }
+                      return null;
+                    },
                   ),
-                  validator: (value) {
-                    if (value == null || value.isEmpty) {
-                      return 'Please enter your password';
-                    }
-                    return null;
-                  },
-                ),
-                if (authState.error != null) ...[
                   const SizedBox(height: 16),
+                  TextFormField(
+                    controller: _passwordController,
+                    obscureText: true,
+                    decoration: const InputDecoration(
+                      labelText: '密码',
+                      prefixIcon: Icon(Icons.lock_outline),
+                    ),
+                    validator: (value) {
+                      if (value == null || value.isEmpty) {
+                        return '请输入密码';
+                      }
+                      return null;
+                    },
+                    onFieldSubmitted: (_) => _handleLogin(),
+                  ),
+                  if (authState.error != null) ...[
+                    const SizedBox(height: 16),
+                    Container(
+                      padding: const EdgeInsets.symmetric(
+                        horizontal: 12,
+                        vertical: 8,
+                      ),
+                      decoration: BoxDecoration(
+                        color: AppColors.error.withAlpha(25),
+                        borderRadius: BorderRadius.circular(8),
+                      ),
+                      child: Row(
+                        children: [
+                          const Icon(Icons.error_outline,
+                              color: AppColors.error, size: 18),
+                          const SizedBox(width: 8),
+                          Expanded(
+                            child: Text(
+                              authState.error!,
+                              style: const TextStyle(
+                                color: AppColors.error,
+                                fontSize: 13,
+                              ),
+                            ),
+                          ),
+                        ],
+                      ),
+                    ),
+                  ],
+                  const SizedBox(height: 24),
+                  SizedBox(
+                    width: double.infinity,
+                    height: 48,
+                    child: FilledButton(
+                      onPressed: authState.isLoading ? null : _handleLogin,
+                      child: authState.isLoading
+                          ? const SizedBox(
+                              height: 20,
+                              width: 20,
+                              child: CircularProgressIndicator(
+                                strokeWidth: 2,
+                                color: Colors.white,
+                              ),
+                            )
+                          : const Text(
+                              '登录',
+                              style: TextStyle(fontSize: 16),
+                            ),
+                    ),
+                  ),
+                  const SizedBox(height: 32),
                   Text(
-                    authState.error!,
-                    style: const TextStyle(color: Colors.red),
+                    '账号由管理员在后台创建或通过邀请链接注册',
+                    style: TextStyle(
+                      color: AppColors.textMuted,
+                      fontSize: 12,
+                    ),
+                    textAlign: TextAlign.center,
                   ),
                 ],
-                const SizedBox(height: 24),
-                SizedBox(
-                  width: double.infinity,
-                  child: FilledButton(
-                    onPressed: authState.isLoading ? null : _handleLogin,
-                    child: authState.isLoading
-                        ? const SizedBox(
-                            height: 20,
-                            width: 20,
-                            child: CircularProgressIndicator(
-                              strokeWidth: 2,
-                              color: Colors.white,
-                            ),
-                          )
-                        : const Text('Login'),
-                  ),
-                ),
-              ],
+              ),
             ),
           ),
         ),