Update courses-cn.html

Author: riverfor

docs/courses-cn.html

@@ -24,17 +24,17 @@
                     <h2 class="text-xl font-bold text-center">QPython起源</h2>
                 </div>
             </a>
-            <a href="#" onclick="milib.openUrl('https://www.bilibili.com/video/BV1Gi9iYYE6b/')" class="block bg-white rounded-lg shadow-lg overflow-hidden">
+            <a href="#" onclick="milib.openUrl('https://www.bilibili.com/video/BV1Gi9iYYE6b/')" class="block bg-grey-100 rounded-lg shadow-lg overflow-hidden">
                 <img src="https://edu.qpython.org/static/qiyuan.png" alt="QPython使用介绍" class="w-full">
-                <div class="p-4">
+                <div class="p-4 bg-white">
                     <h2 class="text-xl font-bold text-center">QPython使用介绍</h2>
                 </div>
             </a>
 
             <!-- Image 3 -->
-            <a href="#" onclick="milib.openUrl('https://mp.weixin.qq.com/s/UVpkhDtnL-00CpgS11PkWg')" class="block bg-white rounded-lg shadow-lg overflow-hidden">
+            <a href="#" onclick="milib.openUrl('https://mp.weixin.qq.com/s/UVpkhDtnL-00CpgS11PkWg')" class="block bg-grey-100 rounded-lg shadow-lg overflow-hidden">
                 <img src="https://edu.qpython.org/static/zhishi-nobg.png" alt="QPython知识星球" class="w-full">
-                <div class="p-4">
+                <div class="p-4 bg-white">
                     <h2 class="text-xl font-bold text-center">QPython VIP社区</h2>
                 </div>
         </a>