body {
  font-size: 12px;
  width: 900px;
}
.overview-area, .detail-area, .caution-area {
  margin-top: 5px;
  margin-left: 15px;
  margin-bottom: 15px;
}
.chapter {
  font-size: 18px;
  font-weight: bold;
  margin-left: 10px;
}
.section {
  font-size: 14px;
  font-weight: bold;
  margin-top: 10px;
  margin-bottom: 10px;
}
.ul_comment {
  list-style: none;
  padding-left: 1.5em;
  margin-left: 0.5em;
}
.ul_comment li {
  text-indent: -1.5em;
}

.caption-font {
  text-align: center;
  font-size: 14px;
  font-weight: bold;
}
.section-area {
 {
  margin-left: 25px;
  width: 900px;
}

.w20 { width: 20px; }
.w120 { width: 120px; }
.w200 { width: 200px; }
.w280 { width: 280px; }
.w300 { width: 300px; }
.w370 { width: 370px; }
.w400 { width: 400px; }
.w480 { width: 480px; }
.w520 { width: 520px; }
.w535 { width: 535px; }
.w550 { width: 550px; }
.w600 { width: 600px; }
.w660 { width: 660px; }
.w675 { width: 675px; }
.w900 { width: 900px; }
.mgt5 { margin-top: 5px; }
.mgb5 { margin-bottom: 5px; }
.mgl0 { margin-left: 0px; }
.thw20 { width: 20px; }
.thw200 { width: 200px; }
.thww680 { width: 680px; }
.thbgc { background-color: #CCFFFF; }
.tacent { text-align: center }