@charset "UTF-8";
/* CSS Document */
html {
  font-size: 62.5%; /* 16px * 62.5% = 10px */
  width: 100%;
  box-sizing: border-box;
}
body {
  color: #333; /* RGB */
  font-family: -apple-system, BlinkMacSystemFont, Roboto, "Segoe UI", "Helvetica Neue", HelveticaNeue, YuGothic, "Yu Gothic Medium", "Yu Gothic", Verdana, Meiryo, sans-serif;
  font-weight: 500;
  font-size: 1.6em;
  line-height: 2.4rem;
  text-align: center;
}
b, strong, .bold{
	font-family: -apple-system, BlinkMacSystemFont, Roboto, "Segoe UI semibold", "Helvetica Neue", HelveticaNeue, YuGothic, "Yu Gothic", "Segoe UI", Verdana, Meiryo, sans-serif;
}
/* IEだけに適応 */
_:lang(x)::-ms-backdrop, .selector {
	font-family: "Segoe UI", Meiryo, sans-serif;
}
section h2 {
  font-size: 2.4rem;
}
a:hover {
  opacity: 0.5;
}
.none {
  display: none;
}

*, *:before, *:after {
  box-sizing: border-box;
}


/* return to top */
#scroll-top {
  position: fixed;
  background-color: #fff;
  opacity: 1;
  bottom: 14px;
  padding: 20px 24px 16px;
  height: 64px;
  width: 64px;
  right: 14px;
  z-index: 16;
  border-radius: 100%;
  align-items: center;
  justify-content: center;
  display: flex;
  border: solid 1px #e0e0e0;
}
#scroll-top::after {
  position: absolute;
  content: "";
  border-top: 1px solid #999;
  border-right: 1px solid #999;
  width: 16px;
  height: 16px;
  -webkit-transform: rotate(-45deg);
  transform: rotate(-45deg);
  right: 23px;
  top: 28px;
}

#scroll-top a {
  text-decoration: none;
  color: #333;
}