html文字无法选中

    <style>
.cover-blue {
  background-color: rgba(37, 104, 163, 0.1);
  background-image: -webkit-linear-gradient(-410deg, rgba(37, 104, 163, 0.8) 20%, rgba(18, 51, 80, 0.8));
  background-image: linear-gradient(140deg,rgba(37, 104, 163, 0.3) 20%, rgba(18, 51, 80, 0.3)); }
article {
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -o-user-select: none;
    user-select: none;
}
</style>