fix font load error

src/css/app.styl

 // app global css
-@import url('https://fonts.googleapis.com/css?family=Montserrat:100,300,400,500,700&display=swap');
+@import url('https://fonts.googleapis.com/css?family=Montserrat&display=swap');
 body {
     font-family: 'Montserrat', sans-serif;
 }
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