diff --git a/Bootstrap.Admin/Views/Account/Login.cshtml b/Bootstrap.Admin/Views/Account/Login.cshtml
index 737eadad..3f37a2dc 100644
--- a/Bootstrap.Admin/Views/Account/Login.cshtml
+++ b/Bootstrap.Admin/Views/Account/Login.cshtml
@@ -55,7 +55,7 @@
                                 <span class="fa fa-user-plus"></span>
                             </div>
                         </div>
-                        <input type="text" id="userName" autocomplete="off" class="form-control" placeholder="登陆账号不可为空" value="" maxlength="50" remote="api/New/" data-remote-msg="此用户已存在" data-valid="true" />
+                        <input type="text" id="userName" autocomplete="off" class="form-control" placeholder="登陆账号不可为空" minlength="4" maxlength="50" remote="api/New/" data-remote-msg="此用户已存在" data-valid="true" />
                     </div>
                 </div>
                 <div class="form-group">
diff --git a/Bootstrap.Admin/wwwroot/css/login.css b/Bootstrap.Admin/wwwroot/css/login.css
index 2bb4cd02..583eabbd 100644
--- a/Bootstrap.Admin/wwwroot/css/login.css
+++ b/Bootstrap.Admin/wwwroot/css/login.css
@@ -32,14 +32,13 @@
     margin-top: -8px;
 }
 
-.form-control:focus, .form-control.is-valid:focus, .form-control.is-invalid:focus, .btn:focus, .btn:focus:active {
-    box-shadow: none;
-}
+    .btn-login:focus {
+        box-shadow: 0 4px #e56b60;
+    }
 
 .input-group-text {
     background-color: #6bc3f4;
     border-color: #1ca0e9;
-    line-height: 1.5;
 }
 
 .form-control {