body {
  background-color: #fff5cf;
  margin: 0;
}
img {
  width: 100%;
  height: auto;
  display: block;
}
.iframe-wrapper {
  position: relative;
  padding-bottom: 75%;
  height: 0;
  overflow: hidden;
  width: 100%;
  max-width: 1440px;
  margin: 0 auto 40px;
}
@media (min-width: 768px) {
  .iframe-wrapper {
    padding-bottom: 56.25%;
    width: 75%;
  }
}

.iframe-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
iframe {
  border: 0;
}

.guide {
  width: 84%;
  max-width: 716.8px;
  margin: 0 auto;
}
.banner {
  width: 92%;
  max-width: 1024px;
  margin: 10px auto 48px;
  box-shadow: 6px 6px 4px rgba(18, 18, 18, 0.16);
}
@media (min-width: 768px) {
  .guide {
    width: 88%;
  }
  .banner {
    transition: transform 0.6s ease;
  }
  a:hover img {
    transform: scale(1.05);
  }
}
.copyright {
  font-size: 14px;
  color: #999;
  margin-bottom: 24px;
  text-align: center;
}

/* 表示非表示制御 */
.show-pc {
  display: none;
}
.show-sp {
  display: block;
}
@media (min-width: 768px) {
  .show-pc {
    display: block;
  }
  .show-sp {
    display: none;
  }
}