feat: 优化配置项

vue.config.js

@@ -4,6 +4,13 @@ module.exports = {
   outputDir: "qmx_page_admin",
   productionSourceMap: false,
   lintOnSave: false,
+  css: {
+    loaderOptions: {
+      sass: {
+        prependData: `@import '@/assets/css/_variables.scss';`
+      }
+    }
+  },
   configureWebpack: {
     devtool: 'source-map',
     plugins: [