.kaki-title {
    text-align: center;
    font-weight: bold;
    font-size: 18px;
  margin-top:10px;
}

.kaki-t {
     margin: 20px 0;
}

.kaki-d{
  color:#d90000;
  font-weight: bold;
}
.youtube {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
}
.youtube iframe {
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
}