body {
	font-family: メイリオ,ヒラギノ角ゴ,sans-serif;
	margin: 0;
	padding: 0;
}


header h1{
	font-size: 10px;
	font-family: ヒラギノ角ゴシック,sans-serif;
	color: darkgoldenrod;
	text-align: left;
	font-weight: normal;
	vertical-align: middle;
	margin-left: 10px;
	margin-bottom: 0px;
}

header h2{
	font-size: 8px;
	font-family: ヒラギノ角ゴシック,sans-serif;
	color: darkgray;
	text-align: left;
	font-weight: normal;
	vertical-align: middle;
	margin-left: 10px;
	margin-top: 0px;
}

.slide_img {
	position: relative;
	top: 0;
	left: 0;
}

.slide_img div{
	width: 100%;
	list-style-type= none;
	position: absolute;
	z-index: 8;
	opacity: 0.0;
}


.slide_img div > img{
	width: 100%;

}

.slide-img div > h2{
	top: 0;
	left: 0;
	text-align: center;

}


.slide_img div.active {
   z-index: 10;
   opacity: 1.0;
}
.slide_img div.last-active {
   z-index: 9;
}




.introduction {
	padding-top: 60%;
	margin: 0 auto;
	width: 90%;
	text-align: center;
}

.introduction h1{
	font-size: 20px;
	color: darkgoldenrod;
	font-weight: lighter;
}

.introduction h2{
	font-size: 15px;
	color: dimgray;
	font-weight: lighter;
}

.olympic {
	width: 80%;
	margin: 0 auto;
	text-align: center;
	border-style: solid;
	border-width: 1px;
	border-color: wheat;
	border-radius: 5px;
	font-size: 15px;
	color: dimgray;
	font-weight: lighter;
}

.olympic iframe {
	width: 90%;
	height: 90%;
	position: absolute;
	top: 5%;
	left: 5%;
}

.olympic .iframe-wrapper {
	position: relative;
	padding-bottom: 56.25%;
	height: 0;
}

.explain {
	width: 80%;
	padding-top: 5%;
	margin: 0 auto;
	text-align: center;
}

.explain-contents::first {
	border-style: solid;
	border-width: 1px;
	border-color: tan;
	border-radius: 5px;
}
.explain-contents {
	border-style: solid;
	border-width: 1px;
	border-color: wheat;
	border-radius: 5px;
	margin-bottom: 30px;
}

.explain-contents a{
	cursor: pointer;
	text-decoration: none;
	color: coral;
}

.explain-img {
	width: 30px;
	height: 30px;
	padding-top: 10px;
}


.explain-title {
	font-size: 20px;
	color: darkgoldenrod;
	font-weight: lighter;
}

.explain-sentence {
	color: dimgray;
	font-size: 15px;
	font-weight: lighter;

}

.explain-contents h2 > img {
	width: 20px;
	height: 20px;
	vertical-align: bottom;
}

.news {
	margin: 30px auto;
	width: 90%
	text-align: center;
}

.explain-contents .button1 {
	font-size: 15px;
	margin: 0 auto;
	width: 300px;
	height: 40px;
	text-align: center;
	vertical-align: middle;
	background-color:turquoise;
	color: white;
	border-radius: 5px;
	cursor: pointer;
}

.button1 a{
	color: white;
}

#icon_menu{
	width: 25px;
	height: 25px;
}

#open_menu {
	float: right;
	font-size: 20px;
	cursor: pointer;
	padding-right: 15px;
	padding-top: 3px;
	z-index: 999;
}

#close_menu {
  font-size: 30px;
  padding: 15px;
  float: right;
  cursor: pointer;
  color: lightgray;
  z-index: 999;
}

#menu {
  position: absolute;
  height: 100%;
  top: 0;
  left: 40%;
  right: 0;
  background: rgba(76, 76, 76, .9);
  color: white;
  display: none;
  z-index: 999;
}

#menu.shown {
  display: block;
}

#menu ul {
  list-style: none;
  margin: 0;
  padding: 10px 20px;
}

#menu li {
  line-height: 3;
}

#menu a {
  text-decoration: none;
  color: inherit;
}

/* medium screens */

@media (min-width: 570px) {


}

/* large screens */

@media (min-width: 912px) {

.slide_img {
	width: 90%;
	margin: 0 auto;
}

}