.introduction {
  background: url("../img/top/bg.jpg") no-repeat center top;
  -webkit-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  position: relative;
}
.introduction:before {
  content: '';
  display: block;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.8);
  position: absolute;
}
.introduction .lead {
  margin-left: 60px;
  padding-top: 128px;
  position: relative;
}