.menu { list-style: none; margin: 0 auto; }
.menu li { float: left; margin: 0 auto; 
           cursor: pointer; 
           width: 99px; height: 55px; 
           border-right: 1px solid #dedede; 
           color: #797e84; font-size: 16px; 
           font-weight: bold; 
           text-align: center; 
           position:relative;
}
.menu li a { display:block;  width: 100%; 
            float: left; 
           width: 99px; height: 55px; 
           padding-top: 30px; 
           border-right: 1px solid #dedede; 
           font-size: 16px; 
           font-weight: bold; 
           text-align: center; 
           color:#797e84;
}
.menu li img {position:absolute;left:38px;top:17px;}
.a_color_g {border-bottom: 5px solid #5abe00;}