body {
  color: $fg-color;
  background-color: $bg-color; // 备用背景颜色
  background-image: url('/images/normal.jpg'); // 默认背景图片
  background-size: cover; // 让背景图片覆盖整个页面
  background-repeat: no-repeat; // 不重复背景图片
  background-attachment: fixed; // 背景图片固定，不随滚动条移动
  font-family: $font-family;
  font-size: 1.8em;
  font-weight: 400;
  line-height: 1.8em;

  @media (prefers-color-scheme: dark) {
    background-image: url('/images/dark.jpg'); // 暗色模式背景图片
  }

  @media only screen and (max-width: 768px) {
    font-size: 1.6em;
    line-height: 1.6em;
  }
}

@mixin base_dark {
  color: $fg-color-dark;
  background-color: $bg-color-dark;
  background-image: url('/images/dark.JPG'); // 添加背景图片
  background-size: cover; // 让背景图片覆盖整个页面
  background-repeat: no-repeat; // 不重复背景图片
  background-attachment: fixed; // 背景图片固定，不随滚动条移动

  a {
    color: $link-color-dark;
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    color: $alt-fg-color-dark;

    &:hover .heading-link {
      visibility: visible;
    }

    .heading-link {
      color: $link-color-dark;
      font-weight: inherit;
      text-decoration: none;
      font-size: 80%;
      visibility: hidden;
    }

    .title-link {
      color: inherit;
      font-weight: inherit;
      text-decoration: none;
    }
  }

  pre code {
    background-color: inherit;
    color: inherit;
  }

  code {
    background-color: $lighter-alt-bg-color-dark;
    color: $fg-color-dark;
  }

  blockquote {
    border-left: 2px solid $alt-bg-color-dark;
  }

  th,
  td {
    padding: 1.6rem;
  }

  table {
    border-collapse: collapse;
  }

  table td,
  table th {
    border: 2px solid $alt-fg-color-dark;
  }

  table tr:first-child th {
    border-top: 0;
  }

  table tr:last-child td {
    border-bottom: 0;
  }

  table tr td:first-child,
  table tr th:first-child {
    border-left: 0;
  }

  table tr td:last-child,
  table tr th:last-child {
    border-right: 0;
  }
}

body.colorscheme-dark {
  @include base_dark();
}

body.colorscheme-auto {
  @media (prefers-color-scheme: dark) {
    @include base_dark();
  }
}