先安装并保存为devDependency

$ yarn add sass sass-loader --dev
# or
$ npm install sass sass-loader --save-dev

配置是否要使用全局scss

// nuxt.config.ts
export default defineNuxtConfig({
  // more  
  css: [
    // SCSS file in the project
    "~/assets/style/main.scss", // you should add main.scss somewhere in your app
  ],
})

在您的组件中

<style lang="scss" scoped>
 //...
<style/>