gatsby-theme-zh/site/layouts/layout.module.less

gatsby-theme

:global {
  .gatsby-highlight-code-line {
    background-color: #feb;
    display: block;
    margin-right: -1em;
    margin-left: -1em;
    padding-right: 1em;
    padding-left: 0.75em;
    border-left: 0.25em solid #f99;
  }
}

.main {
  min-height: 66vh;
}