#base{
  width: 1220px;
}

div#cont div#c3_l{
  width: 970px;
}

div#cont div#c3_lr{
  width: 730px;
}

#biz_writing_container .mainBox .mainContents{
  width: 500px;
}

.index__heading{
  background-color: #666;
  color: #fff;
  padding: 3px 10px;
  font-weight: bold;
}