.ad {
  width: 700px;
  margin: 20px auto 10px auto;
}

.ad-img {
  width:  700px;
}

.smessage {
  width:700px;
  margin:10px auto;
  font-size: 90%;
}

.search {
  margin: auto;
  width:700px;
  display: flex;
  align-items:flex-start;
  justify-content: center;
}

#h3-shimekiri-text {
  text-align: center;
  margin: 13px 0 13px 0;
  font-size: 90%;
}