div.main {
  width:60%;
  float:none;
  margin-left:auto;
  margin-right:auto;
}

div.main ul li#li-description {
  background-image:url(../images/ttl/ttl_green10.gif);
}

div.main ul li#li-skill {
  background-image:url(../images/ttl/ttl_green2.gif);
}

div.main ul li#li-fee {
  background-image:url(../images/ttl/ttl_green5.gif);
}