.caption {
  padding-left: calc(1em + 5px);
  color: #252525;
  font-size: 12px;
  line-height: 1.4;
  position: relative;
  box-sizing: border-box;
  width: calc(100% - 40px);
  max-width: 1200px;
  margin: 30px auto 0;
}
.caption::before {
  content: "※";
  position: absolute;
  top: 0;
  left: 0;
}

@media screen and (max-width: 650px) {
  .caption {
  margin: 20px auto 0;
  width: calc(100% - 20px);
  }
}