调整

public/react/public/css/edu-all.css

@@ -524,7 +524,7 @@ li.li-width15{width: 15%;text-align: left}
 li.li-width7{width: 7%;text-align: left}
 
 /*-----------------------------在线课堂动态----------------------------------*/
-.courseHead{width: 100%;margin-bottom:40px;background-size: 100% 100%;background-image: url("/images/educoder/course-detail.jpg");height: 240px;
+.courseHead{width: 100%;margin-bottom:40px;background-size: 100% 100%;background-image: url("/images/educoder/courtailsbdpicture.jpg");height: 240px;
     justify-content: center;align-items: center;display: -webkit-flex;
     background-size: cover;
     background-position: center;
@@ -3483,4 +3483,4 @@ a.singlepublishtwo{
 .markdown-body {
     text-align: justify;
     word-break: break-all;
-}
+}

public/stylesheets/educoder/edu-all.css

@@ -528,7 +528,7 @@ li.li-width15{width: 15%;text-align: left}
 li.li-width7{width: 7%;text-align: left}
 
 /*-----------------------------在线课堂动态----------------------------------*/
-.courseHead{width: 100%;margin-bottom:40px;background-size: 100% 100%;background-image: url("/images/educoder/course-detail.jpg");height: 240px;
+.courseHead{width: 100%;margin-bottom:40px;background-size: 100% 100%;background-image: url("/images/educoder/courtailsbdpicture.jpg");height: 240px;
     justify-content: center;align-items: center;display: -webkit-flex;
     background-size: cover;
     background-position: center;
@@ -3803,4 +3803,4 @@ a.singlepublishtwo{
 .markdown-body {
     text-align: justify;
     word-break: break-all;
-}
+}