.box {
  display: flex;
  justify-content: center;
  align-items: center;
　text-align:center;
  position: relative;
  height: 400px;
  max-width: 980px;
  width: 100%;
  margin: 20px auto;
  background: url("/user_data/img/heat_stroke/ncbg-min.png") no-repeat 0 0/cover;
}
.box.fact {
 background:  url("/user_data/img/heat_stroke/factory-heatstroke.png") no-repeat 0 0/cover;
}
h1 {
  z-index: 1;
  font-size: 30px;
  font-weight: bold;
  color: #FFF;
}
.overlay1::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background: rgba(0, 0, 0, 0.6);
}
.yohaku{
	margin:0px 40px;
}