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

ul.anticons-list {
  margin: 10px 0;
  list-style: none;
  overflow: hidden;
  li {
    float: left;
    width: 16.66%;
    text-align: center;
    list-style: none;
    cursor: pointer;
    height: 100px;
    color: #555;
    transition: color .3s ease-in-out, background-color .3s ease-in-out;
    position: relative;
    margin: 3px 0;
    border-radius: 4px;
    background-color: #fff;
    overflow: hidden;
    padding: 10px 0 0;
    .anticon {
      font-size: 36px;
      margin: 12px 0 8px;
      transition: transform .3s ease-in-out;
      will-change: transform;
    }

    .anticon-class {
      display: block;
      text-align: center;
      transform: scale(0.83);
      font-family: "Lucida Console", Consolas;
      white-space: nowrap;
      .ant-badge {
        transition: color .3s ease-in-out;
      }
    }

    &:hover {
      background-color: @primary-color;
      color: #fff;
      .anticon {
        transform: scale(1.4);
      }
      .ant-badge {
        color: #fff;
      }
    }

    &.copied:hover {
      color: rgba(255, 255, 255, 0.2);
    }

    &:after {
      position: absolute;
      top: 0;
      left: 0;
      height: 100%;
      width: 100%;
      content: "Copied!";
      text-align: center;
      line-height: 110px;
      color: #fff;
      transition: all 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28);
      opacity: 0;
    }

    &.copied:after {
      opacity: 1;
      top: -10px;
    }
  }
}