@font-face {
  font-family: 'Ubuntu Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(https://fonts.gstatic.cn/s/ubuntumono/v18/KFOjCneDtsqEr0keqCMhbBc9.ttf) format('truetype');
}