纯css3实现鼠标经过图片显示描述的动画效果

<div align="center">
<div class="carre_couleur base_hov" style="background-color: #f8b334;">
<a target="_blank" href="http://.w2bc.">
<div class="retract" style="background-color: #f8b334;">
<img src="img/1.png"></div>
<div class="aed">
<div class="big_aed" style="color: #f39c12;">
BEST HOME</div>
<div class="middle_aed">
This home is the best</div>
</div>
</a>
</div>
<div class="carre_couleur base_hov" style="background-color: #2e71;">
<a target="_blank" href="http://.w2bc.">
<div class="retract" style="background-color: #2e71;">
<img src="img/2.png"></div>
<div class="aed">
<div class="big_aed" style="color: #27ae60;">
BEST PIC</div>
<div class="middle_aed">
This pic is the best</div>
</div>
</a>
</div>
<div class="carre_couleur base_hov" style="background-color: #e74c3c;">
<a target="_blank" href="http://.w2bc.">
<div class="retract" style="background-color: #e74c3c;">
<img src="img/3.png"></div>
<div class="aed">
<div class="big_aed" style="color: #c0392b;">
BEST PC</div>
<div class="middle_aed">
This puter is the best</div>
</div>
</a>
</div>

.carre_couleur
{
width: 200px;
height: 200px;
display: inline-block;
position: relative;
margin-: 0px;
}
.base_hov .retract
{
-webkit-transition: all 200ms ease-in;
-webkit-transform-origin: 50% 20%;
-webkit-transform: scale(1);
-moz-transition: all 200ms ease-in;
-moz-transform-origin: 50% 20%;
-moz-transform: scale(1);
-ms-transition: all 200ms ease-in;
-ms-transform-origin: 50% 20%;
-ms-transform: scale(1);
transition: all 200ms ease-in;
transform-origin: 50% 20%;
transform: scale(1);
width: 200px;
height: 200px;
position: absolute;
z-index: 2;
left: 0;
}
.base_hov:hover .retract
{
-webkit-transition: all 200ms ease-in;
-webkit-transform: scale(0.6);
-moz-transition: all 200ms ease-in;
-moz-transform: scale(0.6);
-ms-transition: all 200ms ease-in;
-ms-transform: scale(0.6);
transition: all 200ms ease-in;
transform: scale(0.6);
}
.aed
{
width: 180px;
padding: 10px;
bottom: 0;
position: absolute;
z-index: 1;
text-align: left;
}
.big_aed
{
color: #ffffff;
font-size: 25px;
font-weight: 400;
}
.middle_aed
{
color: #ffffff;
font-size: 15px;
font-weight: 400;
}