add baidu style

css/common/bootstrap.less

@@ -38,8 +38,19 @@
 }
 
 .dropdown-menu {
-    a {
+    margin-top: 0;
+    border-radius: 0;
+    background: #323842;
+    border: none;
+    >li>a {
         cursor: pointer;
+        color: #B6CBDD;
+
+        &:hover,
+        &:focus {
+            color: #FFF;
+            background: #232830;
+        }
     }
 }
 
@@ -73,18 +84,62 @@ hr {
     background: #F9F9F9;
 }
 
+.btn-groups {
+    line-height: 50px;
+
+    >.split {
+        width: 1px;
+        height: 30px;
+        line-height: 30px;
+        background: #D8D8D8;
+        margin: 0 8px;
+        display: inline-block;
+        vertical-align: middle;
+    }
+}
+
 .btn-flat {
     border-radius: 0;
     color: #FFF;
     background: #738089;
 
     &:hover,
-    &:focus {
-        color: #FFF;
-        background: darken(#738089, 10%);
+    &:focus, {
+        background: #323842;
+        color: #B6CBDD;
+        outline: none;
     }
 
-    .ico {
+    >.ico-left {
         margin-right: 8px;
     }
+
+    >.ico {
+        pointer-events: none;
+    }
+
+    >.drop {
+        display: inline-block;
+    }
+}
+
+.btn-new {
+    color: #FFF;
+    background: #4A90E2;
+}
+
+.btn-preview {
+    color: #FFF;
+    background: #28B4A0;
+}
+
+.btn-ico {
+    padding: 5px 10px;
+    font-size: 12px;
+    line-height: 1.5;
+    >.ico {
+        font-size: 16px;
+        line-height: 18px;
+        margin-right: 0;
+    }
 }