box-shadow四周都有阴影

  <style>
.shadow{
   -webkit-box-shadow: #666 0px 0px 10px;
   -moz-box-shadow: #666 0px 0px 10px;
   box-shadow: #666 0px 0px 10px;
   background: #EEFF99;
    width: 100px;
      height: 100px;
}
  </style>