css3元素向上移动

.slcon{    margin:auto;    font-size: 2em;    padding:60% 0;    display: table;    color:#4c4c4c;    line-height: 2em;    animation:myfirst 3s;    -webkit-animation:myfirst 3s;    animation-fill-mode: forwards;}

@-webkit-keyframes myfirst /* Safari and Chrome */{    100%   {padding:20% 0;}    /*25%  {padding:30% 0;}    50%  {padding:40% 0;}    75%  {padding:50% 0;}    100% {padding:60% 0;}*/}