feat: 替换sass版本，定义全局样式，实现简单的页面布局操作，比如颜色、边距、圆角等

src/pages/login/index.vue

@@ -146,7 +146,7 @@ getPrivacyAgreementData();
 </script>
 
 <style lang="scss" scoped>
-@use "./styles/index.scss";
+@import "./styles/index.scss";
 @font-face {
   font-family: znicons;
   src: url("@/static/fonts/znicons.ttf");