style(Header): 将导航栏背景色修改为整体背景色

app/components/Header.vue

@@ -80,8 +80,8 @@ watchEffect(() => {
   left: 0;
   right: 0;
   z-index: 1000;
-  background: transparent;
-  // background: #030014;
+  // background: transparent;
+  background: #030014;
   transition: transform 0.3s ease;
 
   &.header-hidden {