#feature {
  margin: 0px;
  padding: 0px; 
  width: 640px;
/*  border: 1px solid green; */
}
#feature p {
  font-size: 14px;
  line-height: 25px;
  color: #333333;
}
#feature img {
  float: right;
  margin: 5px;
}



#txt_kokugo {
  margin: 5px;
  padding: 1em;
  border: 4px solid #FCA;
  border-bottom: 4px solid #C60;
  border-right: 4px solid #E96;
}
#txt_sansu {
  margin: 0 5px;
  padding: 1em;
  border: 4px solid #ACF;
  border-bottom: 4px solid #06C;
  border-right: 4px solid #69E;
}
#txt_shakai {
  margin: 0 5px;
  padding: 1em;
  border: 4px solid #AFC;
  border-bottom: 4px solid #0C6;
  border-right: 4px solid #6E9;
}

#txt_rika {
  margin: 0 5px;
  padding: 1em;
  border: 4px solid #CAF;
  border-bottom: 4px solid #60C;
  border-right: 4px solid #96E;
}


/*:::::::::::::::::::::::::*/
#gradebutton {
  background: url(../elementary/img/gradebutton.gif) no-repeat;
}
ul.gradebutton {
  margin-top: 20px;
  padding-top: 72px;
  padding-left: 5px;
  margin-left: 0;
}
ul.gradebutton li a{
  list-style: none;
  width: 92px;
  float: left;
  display: block;
  margin-left: 7px;
  padding: 18px 1px;
  text-align: center;
/*  border: 1px solid #96E;*/
}