delete all element-plus related.

src/learn/index.vue

@@ -18,14 +18,14 @@ function change(value: string) {
 </script>
 
 <template>
-  <el-row>
-    <el-col :span="12">
+  <n-grid :cols="2">
+    <n-gi>
       <Md />
-    </el-col>
-    <el-col :span="12">
+    </n-gi>
+    <n-gi>
       <Monaco :value="code" @change="change" />
-    </el-col>
-  </el-row>
+    </n-gi>
+  </n-grid>
 </template>
 
 <style scoped></style>

src/learn/step-1/index.md

@@ -7,3 +7,7 @@ int main() {
    return 0;
 }
 ```
+
+## nihao
+
+我的