ant-design/site/theme/static/demo.less

.code-boxes-col-1-1 {
  width: 100%;
}

.code-boxes-col-2-1 {
  display: inline-block;
  vertical-align: top;
}

.code-box {
  border: 1px solid @border-color-split;
  border-radius: @border-radius-base;
  display: inline-block;
  width: 100%;
  position: relative;
  margin: 0 0 16px;
  transition: all .2s;

  &:target {
    border: 1px solid @primary-color;
    z-index: 10;
  }

  &-expand-trigger {
    cursor: pointer;
    font-size: 14px;
    color: #9199ac;
    margin-left: 5px;
    opacity: .8;
    transition: all .3s;
    top: -2px;
    position: relative;

    &-active {
      color: #3b4357;
    }
  }

  &-title {
    position: absolute;
    top: -14px;
    padding: 1px 8px;
    margin-left: -8px;
    color: #777;
    border-radius: @border-radius-base;
    border-top-left-radius: 0;
    background: #fff;
    transition: background-color .4s;

    a,
    a:hover {
      color: @text-color;
      font-size: 14px;
      font-weight: 500;
    }
  }

  a.edit-button {
    position: absolute;
    right: -16px;
    top: 7px;
    font-size: 12px;
    transform: scale(0.9);
    background: #fff;
    padding-right: 6px;
  }

  &-demo {
    border-bottom: 1px solid @border-color-split;
    padding: 42px 20px 50px;
  }

  iframe {
    width: 100%;
    border: 0;
  }

  &-meta {
    &.markdown {
      position: relative;
      padding: 17px 16px 15px 20px;
      border-radius: 0 0 @border-radius-base @border-radius-base;
      transition: background-color .4s;
      width: 100%;
      font-size: 12px;
    }

    blockquote {
      margin: 0;
    }

    h4,
    section& p {
      margin: 4px 0;
      width: 98%;
    }

    > p {
      font-size: 12px;
      margin: 0.5em 0;
      padding-right: 25px;
      width: 100%;
      word-break: break-word;
    }
  }

  &.expand &-meta {
    border-radius: 0;
    border-bottom: 1px dashed @border-color-split;
  }

  .collapse {
    position: absolute;
    right: 14px;
    bottom: 22px;
    cursor: pointer;
    width: 16px;
    height: 16px;
    font-size: 16px;
    line-height: 16px;
    opacity: 0.5;
    text-align: center;
    transition: all 0.3s;
    color: #999;
    background: #fff;
    user-select: none;
    border-radius: 100%;
  }

  &.expand .collapse {
    color: shade(@primary-color, 20%);
    transform: rotate(-180deg);

    &:hover {
      opacity: 1;
    }
  }

  .highlight-wrapper {
    display: none;
    overflow: auto;
    border-radius: 0 0 @border-radius-base @border-radius-base;

    &-expand {
      display: block;
    }
  }

  .highlight {
    position: relative;
    pre {
      margin: 0;
      padding: 0;
      background: #fff;
    }
    &:not(:first-child) {
       border-top: 1px dashed @border-color-split;
    }
  }