<a href="#" class="a-btn">  
  <span class="a-btn-text">Зарегистрируйтесь!</span>
  <span class="a-btn-slide-text">Получите продвижение</span>  
  <span class="a-btn-icon-right"><span></span></span>

a{  
  text-decoration:none;  
  }  

  .a-btn{  
background:#fecc5f;  
background:-webkit-gradient(linear,left top,left bottom,color-stop(#feda71,0),color-stop(#febb4a,1));  
background:-webkit-linear-gradient(top, #feda71 0%, #febb4a 100%);  
background:-moz-linear-gradient(top, #feda71 0%, #febb4a 100%);  
background:-o-linear-gradient(top, #feda71 0%, #febb4a 100%);  
background:linear-gradient(top, #feda71 0%, #febb4a 100%);  
filter:progid:DXImageTransform.Microsoft.gradient( startColorstr='#feda71', endColorstr='#febb4a',GradientType=0 );  
border:1px solid #f5b74e;  
border-color:#f5b74e #e5a73e #d6982f;  
-webkit-box-shadow:0 1px 1px #d3d3d3, inset 0 1px 0 #fee395;  
-moz-box-shadow:0 1px 1px #d3d3d3, inset 0 1px 0 #fee395;  
box-shadow:0 1px 1px #d3d3d3, inset 0 1px 0 #fee395;  
padding:0px 80px 0px 10px;  
height:38px;  
display:inline-block;  
position:relative;  
-webkit-border-radius:4px;  
-moz-border-radius:4px;  
border-radius:4px;  
float:left;  
margin:10px;  
overflow:hidden;  
-webkit-transition:all 0.3s linear;  
-moz-transition:all 0.3s linear;  
-o-transition:all 0.3s linear;  
transition:all 0.3s linear;  
  }  
  .a-btn-text{  
padding-top:5px;  
display:block;  
font-size:18px;  
white-space:nowrap;  
color:#996633;  
text-shadow:0 1px 0 #fedd9b;  
-webkit-transition:all 0.3s linear;  
-moz-transition:all 0.3s linear;  
-o-transition:all 0.3s linear;  
transition:all 0.3s linear;  
  }  
  .a-btn-slide-text{  
position:absolute;  
top:35px;  
left:0px;  
width:auto;  
right:52px;  
height:0px;  
background:#fff;  
color:#996633;  
font-size:13px;  
white-space:nowrap;  
font-family:Georgia, serif;  
font-style:italic;  
text-indent:15px;  
overflow:hidden;  
line-height:30px;  
-webkit-box-shadow:-1px 0px 1px rgba(255,255,255,0.4), 1px 1px 1px rgba(0,0,0,0.5) inset;  
-moz-box-shadow:-1px 0px 1px rgba(255,255,255,0.4), 1px 1px 1px rgba(0,0,0,0.5) inset;  
box-shadow:-1px 0px 1px rgba(255,255,255,0.4), 1px 1px 1px rgba(0,0,0,0.5) inset;  
-webkit-transition:height 0.3s linear;  
-moz-transition:height 0.3s linear;  
-o-transition:height 0.3s linear;  
transition:height 0.3s linear;  
  }  
  .a-btn-icon-right{  
position:absolute;  
right:0px;  
top:0px;  
height:100%;  
width:52px;  
border-left:1px solid #f5b74e;  
-webkit-box-shadow:1px 0px 1px rgba(255,255,255,0.4) inset;  
-moz-box-shadow:1px 0px 1px rgba(255,255,255,0.4) inset;  
box-shadow:1px 0px 1px rgba(255,255,255,0.4) inset;  
  }  
  .a-btn-icon-right span{  
width:38px;  
height:38px;  
opacity:0.7;  
position:absolute;  
left:50%;  
top:50%;  
margin:-20px 0px 0px -20px;  
background:transparent url(../img/arrow_right.png) no-repeat 50% 55%;  
-webkit-transition:all 0.3s linear;  
-moz-transition:all 0.3s linear;  
-o-transition:all 0.3s linear;  
transition:all 0.3s linear;  
  }  
  .a-btn:hover{  
height:65px;  
-webkit-box-shadow:0px 1px 1px rgba(255,255,255,0.8) inset, 1px 1px 5px rgba(0,0,0,0.4);  
-moz-box-shadow:0px 1px 1px rgba(255,255,255,0.8) inset, 1px 1px 5px rgba(0,0,0,0.4);  
box-shadow:0px 1px 1px rgba(255,255,255,0.8) inset, 1px 1px 5px rgba(0,0,0,0.4);  
  }  
  .a-btn:hover .a-btn-text{  
text-shadow:0px 1px 1px rgba(0,0,0,0.2);  
color:#fff;  
  }  
  .a-btn:hover .a-btn-slide-text{  
height:30px;  
  }  
  .a-btn:hover .a-btn-icon-right span{  
opacity:1;  
-webkit-transform:rotate(-45deg);  
-moz-transform:rotate(-45deg);  
-ms-transform:rotate(-45deg);  
-o-transform:rotate(-45deg);  
transform:rotate(-45deg);  
  }  
  .a-btn:active{  
position:relative;  
top:1px;  
background:#fec354;  
background:-webkit-gradient(linear,left top,left bottom,color-stop(#fec354,0),color-stop(#fecd61,1));  
background:-webkit-linear-gradient(top, #fec354 0%, #fecd61 100%);  
background:-moz-linear-gradient(top, #fec354 0%, #fecd61 100%);  
background:-o-linear-gradient(top, #fec354 0%, #fecd61 100%);  
background:linear-gradient(top, #fec354 0%, #fecd61 100%);  
filter:progid:DXImageTransform.Microsoft.gradient( startColorstr='#fec354', endColorstr='#fecd61',GradientType=0 );  
border-color:#d29a3a #cc9436 #c89133;  
text-shadow:0 1px 0 #fee1a0;  
-webkit-box-shadow:0 1px 1px #d4d4d4, inset 0 1px 0 #fed17e;  
-moz-box-shadow:0 1px 1px #d4d4d4, inset 0 1px 0 #fed17e;  
box-shadow:0 1px 1px #d4d4d4, inset 0 1px 0 #fed17e;  
  }