body,html{
 	margin: 0;
 	padding: 0;
}

/*
#background {
	color: #5dcccc;
	background-image: url("../img/rb25_PC_org.jpg");
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100vw;
    height: 100vh;
    background-position: center bottom;
    background-size: contain;
	background-repeat: no-repeat;
}
*/

header{
	position: fixed;
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	top: 0;
	left: 0;
	width: 100%;
	text-align: center;
	box-sizing: border-box;
	padding: 0;
}

header>a{
  display: block;
  font-size: 1em;
  text-decoration: none;
  user-select: none;
  padding: 0.1em;
	margin:  0 5px 17px 5px;
}

header>a>svg{
  display: block;
  margin-left: auto;
  margin-right: auto;
}

/* Btn Hover */
a svg:hover{
	fill: #fff;
	fill-opacity: 0.6;
}

.rb25{
	position: relative;
	width: 34px;
	height: 34px;
	margin: 0 auto;
	display: block;
	overflow: hidden;
	cursor: pointer;
}

.rb25 img {position: absolute;
	top: 50%;
	left: 50%;
	-webkit-transform: translate(-50%, -50%);
	transform: translate(-50%, -50%);
	width: 100%;
	display: block;
	-webkit-transition: .1s ease-in-out;
	transition: .1s ease-in-out;
}

.rb25:hover img:nth-of-type(2) {
	opacity: 0;
}

/*
.a:hover img{
	background: #fff;
	transition: .3s;
	opacity: 0.6;


}*/


@media only screen and (max-width:980px) {
body {
background-color: #fff;
background-image: url("../img/rb26_SP.png");
background-repeat: no-repeat;
background-attachment: fixed;
background-position: center center;
background-size: cover;
     }
}


@media only screen and (min-width: 981px) {
body {
background-color: #fff;
background-image: url("../img/rb26_PC.png");
background-repeat: no-repeat;
background-attachment: fixed;
background-position: center center;
background-size: contain;
background-repeat: no-repeat;
     }
}

/*
@media screen and (max-width: 981px) {
#background {
	background-image: url(../img/rb25_SP.png);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 90vw;
	height: 90vh;
    background-position: center bottom;
    background-size: contain;
}
*/

header{
	position: fixed;
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	top: 0;
	left: 0;
	width: 100%;
	text-align: center;
	box-sizing: border-box;
	padding: 0;
	margin-top: 30px;
}
	
header>a{
  display: block;
  font-size: 1em;
  text-decoration: none;
  user-select: none;
  padding: 0.1em;
	margin:  0 5px 24px 5px;
	}