fix: import reset.css for website (#862)

Author: anlyyao

site/mobile/main.ts

@@ -5,6 +5,7 @@ import DemoBlock from './components/demo-block.vue';
 import router from './router';
 
 import TDesign from '@/index';
+import '@common/style/mobile/_reset.less';
 import '../styles/mobile/index.less';
 
 createApp(app)