修改头部文字不显示的问题

src/components/Header.vue

@@ -13,7 +13,7 @@
         class="el-menu-demo"
         mode="horizontal"
         @select="handleSelect"
-        text-color="#fff"
+        text-color="#black"
         active-text-color="#FF9900"
       >
         <el-menu-item index="1">主页</el-menu-item>
@@ -22,7 +22,7 @@
             <el-dropdown trigger="click" @command="handleCommand">
               <span
                 class="el-dropdown-link"
-                :style="{ color: activeIndex == 2 ? '#FF9900' : '#fff' }"
+                :style="{ color: activeIndex == 2 ? '#FF9900' : '#black' }"
               >
                 {{ projectName }}
                 <!-- SYSTEM -->
@@ -70,9 +70,9 @@
           trigger="click"
           @command="changeLang"
         >
-          <span class="el-dropdown-link" style="color: #fff">
+          <span class="el-dropdown-link" style="color: #black">
             {{ lang }}
-            <img src="../assets/learncenter/headerDownlod2.png" alt="" />
+            <img src="../assets/learncenter/headerdown3.png" alt="" />
           </span>
           <el-dropdown-menu slot="dropdown" style="width: 200px">
             <el-dropdown-item