less重复代码抽离和导出

.generateButtonStyle(@color) {
  color: #fff;
  background: @color;
  border-color: @color;

  &:hover {
    opacity: 0.8;
    color: #fff;
    background: @color;
    border-color: @color;
  }

  &[disabled],
  &[disabled]:hover {
    color: #fff;
    opacity: 0.5;
    background: @color;
    border-color: @color;
  }
}

.btnConfirm {
  .generateButtonStyle(#74b32f);
}

:export {
  generateButtonStyle: generateButtonStyle;
}