.main {
  position: relative;
  width: 50%;
  margin-top: 135px;
  margin-left: 25%;
  color: #555;
}

.section_name,
.subtitle {
  text-align: center;
  z-index: 10;
}

.section_name h1 {
  font-size: 40px;
  color: #242626;
  padding-bottom: 5px;
  border-bottom: 3px dashed #5cb200;
}
.subtitle h3 {
  font-size: 35px;
  margin-top: 70px;
  margin-bottom: 30x;
}
p {
  z-index: 10;
  font-size: 20px;
  line-height: 1.8em;
}
.content1 {
  margin-bottom: 90px;
}
.content2 {
  display: flex; /* 文章と画像横並び */
}
.about {
  width: 68%;
  margin-right: 4%;
}
.content2 img {
  z-index: 5;
  width: 28%;
  height: auto;
  object-fit: contain; /* 画像の縦横比維持で全体を表示 */
}
.content3 {
  margin-bottom: 90px;
}