.out_box {
  width: 100%;
  overflow: hidden;
}
.shape_box {
  border-bottom-left-radius: 100% 450px;
  border-bottom-right-radius: 100% 450px;
  width: calc(100% + 100px);
  margin-left: -50px;
  overflow: hidden;
}
.image_box {
  height: 700px;
  width: 100%;
  background-color: #e6f0ff;
}

.header {
  height: 100px;
}

.box {
  text-align: center;
  max-width: 440px;
  margin-left: auto;
  margin-right: auto;
  padding-top: 80px;
}

@media only screen and (max-width: 600px) {
  .image_box {
    height: 600px;
  }

  .box {
    max-width: 340px;
  }
}
