.buttonpdf {
  	background:#fff !important;
  	border:none !important;
  	 transition: color 0.3s !important;
  	 color:#4f4f4f ;
  }
  .buttonpdf:hover {
  	color:#54B689;

  }
  .buttonpdf:active {
    color: red;

}
.buttonpdf:visited {
    color: inherit; /* 刷新后恢复原色 */
}