@font-face {
  font-family: 'Helvetica Custom';
  font-style: normal;
  font-weight: 400; /* 400 通常代表 'normal' 或 'regular' */
  src: url('fonts/Helvetica-Light-05.eot');
  src:
    url('fonts/Helvetica-Light-05.eot?#iefix') format('embedded-opentype'),
    url('fonts/Helvetica-Light-05.woff2') format('woff2'),
    url('fonts/Helvetica-Light-05.woff') format('woff'),
    url('fonts/Helvetica-Light-05.ttf') format('truetype'),
    url('fonts/Helvetica-Light-05.svg#Helvetica') format('svg');
  font-display: swap; /* 推荐 */
}