body {
  background-color: #ffffff;
  margin: 0;
  font-family: "游ゴシック体", YuGothic, "YuGothic M", sans-serif;
  font-size: 16px;
  color: #000000;
  width: 100%;
  height: 100%;
}
.container {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 100%;
}

html {
  scroll-behavior: smooth;
}

.page-top {
  display: none;
  position: fixed;
  right: 8px;
  bottom: 0;
  text-indent: -9999px;
  margin: 0;
  z-index: 1;
  padding-bottom: calc(24px + env(safe-area-inset-bottom, 20px));
}

.page-top a {
  position: relative;
  display: block;
  width: 65px;
  height: 65px;
  opacity: 0.8;
  background: #808080;
  border-radius: 9999px;
  transition: opacity 0.6s ease;
}

.page-top a::before {
  position: absolute;
  top: 7px;
  right: 0;
  bottom: 0;
  left: 0;
  display: block;
  width: 14px;
  height: 14px;
  margin: auto;
  content: '';
  transform: rotate(-45deg);
  border-top: 1px solid #FFF;
  border-right: 1px solid #FFF;
}