增加功能：适配微缩工具条小于400宽度时继续缩小

Bootstrap.Admin/Content/css/admin-responsive.css

@@ -63,6 +63,21 @@
     }
 }
 
+@media (max-width: 400px) {
+    .toolbar .dropdown-menu a {
+        border-left: none;
+        padding: 8px;
+    }
+
+        .toolbar .dropdown-menu a:first-child {
+            padding-left: 16px;
+        }
+
+        .toolbar .dropdown-menu a:last-child {
+            padding-right: 16px;
+        }
+}
+
 @media (min-height: 700px) {
     #sidebar {
         padding-top: 94px;

Bootstrap.Admin/Content/css/admin.css

@@ -187,18 +187,26 @@ ul.sidebar-menu {
     display: none;
 }
 
-    .toolbar div {
+    .toolbar .dropdown-menu {
         padding: 0;
+        margin-top: 4px;
         white-space: nowrap;
+        min-width: 40px;
     }
 
-        .toolbar div a:first-child {
+        .toolbar .dropdown-menu a {
+            padding: 8px 20px;
+            border-left: solid 1px #aeb2b7;
+            border-right: none;
+            color: #504d4d;
+        }
+
+            .toolbar .dropdown-menu a:first-child {
                 border-left: none;
             }
 
-        .toolbar div a {
-            padding: 8px 20px;
-            border-left: solid 1px #aeb2b7;
+            .toolbar .dropdown-menu a:hover {
+                color: #235e90;
             }
 
 /*cache*/