@import url(http://fonts.lug.ustc.edu.cn/css?family=Ubuntu:400,700);
body {
  background: #000;
  height:100vh; 
  font-family: 'Ubuntu', sans-serif;
}
.intro{
  text-align:center;
	background:rgba(155, 89, 182,0.7);
  top:0; 
	padding:1em;
}
h1{ 
	color:#fff; 
	font-size:1.5em;
}
h3{
  font-size:1em;
  color:#fff;
}