@charset "utf-8";
*{margin:0;padding:0;outline:0;-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}
html,body{height:100%}
body,label,input,textarea,select{color:#333;font:14px/100% Arial,Helvetica,sans-serif}
img{border:0}


#grid {
    height: 100%;
}
.b {
    width: 50%;
    height: 50%;
    float: left;
}
.b a {
    display: block;
    width: 100%;
    height: 100%;
    position: relative;
    opacity: .4;

    -webkit-transition: opacity .3s;
    -moz-transition: opacity .3s;
    -o-transition: opacity .3s;
    -ms-transition: opacity .3s;
    transition: opacity .3s;
}
.b img {
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -16px 0 0 -16px;
}
.b a:hover {
    opacity: 1;
}
.b.tl {
    border-bottom: 1px solid #eee;
    border-right: 1px solid #eee;
}
.b.tr {
    border-bottom: 1px solid #eee;
}
.b.bl {
    border-right: 1px solid #eee;
}