【报Bug】使用@import导入的scss样式，条件编译无效

操作步骤：

写了一个全局scss样式文件，并在app.vue中导入：

<style lang="scss">  
  @import 'global.scss';  
</style>

global.scss 内容：

/* #ifdef H5 */  
body  
/* #endif */  
/* #ifndef H5 */  
page  
/* #endif */  
{  
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Helvetica,  
    'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', Arial, 'Noto Sans', sans-serif,  
    'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';  
  font-size: 32rpx;  
  color: #383838;  
  -webkit-font-smoothing: antialiased;  
  -moz-osx-font-smoothing: grayscale;  
}

结果编译出来的结果不符合预期，条件编译不起效果；

预期结果：

page {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
font-size: 32rpx;
color: #383838;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}

实际结果：

body page {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
font-size: 32rpx;
color: #383838;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}