in small screen ,background_color has three3

src/forge/UsersList/common_users.js

@@ -84,7 +84,7 @@ class CommonUsers extends Component {
       </React.Fragment>
     );
     return (
-      <div className="background-g pbt15">
+      <div className="pbt15">
         <div className="main background-f  minH-670">
           <div className="plr-20 user-list-items">
             <div className="font-18 pb-10 border-b-line">{type_title}</div>

src/forge/UsersList/fork_users.js

@@ -120,7 +120,7 @@ class ForkUsers extends Component {
       }
     };
     return (
-      <div className="background-g pbt15">
+      <div className="pbt15">
         <div className="main background-f  minH-670">
           <div className="plr-20 user-list-items">
             <div className="font-18 pb-10 border-b-line">Fork列表</div>

src/forge/UsersList/list.css

@@ -2,9 +2,9 @@
   background: #fff;
 }
 .newMain{background: transparent!important;}
-.background-g {
+/* .background-g {
   background: #fafafa;
-}
+} */
 .pt-15 {
   padding-top: 15px;
 }

src/modules/courses/css/Courses.css

@@ -583,7 +583,7 @@ span.CodeMirror-selectedtext {
 
 
 body #root {
-  background: #fafafa;
+  background: #EAEBEC;
 }
 
 .newedu-class-leftnav {

src/modules/tpm/TPMIndex.css

@@ -96,7 +96,7 @@ body>.-task-title {
 }
 
 .newContainer {
-  background: #fafafa !important;
+  background: #EAEBEC !important;
 }
 
 .ant-modal-title {