<div>我是一个标题</div>

@import 'https://fonts.googleapis.com/css?family=Share+Tech+Mono';

@import 'https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css';

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
    width: 100vw;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/1376484/jess-harding-lqT6NAmTaiY-unsplash.jpg'),radial-gradient(#28a3dd, #0d7751);
    background-size: cover;
    background-position: center;
    font-family: "Share Tech Mono", monospace;
    font-size: 2rem;
    background-blend-mode: multiply,screen, overlay;
}

div {
  font-family: "Share Tech Mono", monospace;
  color: #fff;
  font-size: 6vh;
  text-shadow: 1px 1px 1px rgba(0, 0, 0, .45);
  
  display: flex;
  justify-content: center;
  align-items: center;
  
  &::before,
  &::after {
    content: '';
    display: block;
    height: 0.09em;
    min-width: 30vw;
  }
  
  &::before {
    background: linear-gradient(to right, rgba(240,240,240,0), #fff);
    margin-right: 4vh;
  }
  
  &::after {
    background: linear-gradient(to left, rgba(240,240,240,0), #fff);
    margin-left: 4vh;
    
  } 
}