/* basic */
*{
	margin:0;
	padding:0;
	line-height:1.62;
}
html, body{
	height:100%;
}
.clear{
	clear:both;
}
html{
	font: 12px "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", "メイリオ", Meiryo, Osaka, "ＭＳ Ｐゴシック", "MS PGothic", sans-serif;
	color:#333;
}
img{
	border:none;
}
#footer{
	height:40px;
}

/* menu */
#header{
	width:100%;
	height:60px;
	overflow:hidden;
	background:url(../img/header.png) repeat-x;
	position:absolute;
	top:0;
}
ul#menu{
	width:736px;
	height:60px;
	position:absolute;
	top:0;
	left:50%;
	margin-left:-368px;
}
ul#menu li{
	float:left;
	margin:15px 0 0;
	list-style-type:none;
	overflow:hidden;
}

#menu a{
	display:block;
	width:184px;
	height:45px;
	text-indent:-9999px;
	overflow:hidden;
	background-image:url(../img/menu.png);
	background-repeat:no-repeat;
}
#btn01{
	background-position:0 0;
}
#btn02{
	background-position:-184px 0;
}
#btn03{
	background-position:-368px 0;
}
#btn04{
	background-position:-552px 0;
}
#btn05{
	background-position:-736px 0;
}

#btn01:hover{
	background-position:0 -45px;
}
#btn02:hover{
	background-position:-184px -45px;
}
#btn03:hover{
	background-position:-368px -45px;
}
#btn04:hover{
	background-position:-552px -45px;
}
#btn05:hover{
	background-position:-736px -45px;
}

/* Scrooll to Top */
#back-top {
	position: fixed;
	 bottom: 23px;
	right: 8px;
	z-index:10000;
}
#back-top a {
    width: 50px;
    display: block;
    text-align: center;
    font: 11px/100% Arial, Helvetica, sans-serif;
    text-transform: uppercase;
    text-decoration: none;
    outline: none;
}
#back-top a:hover {
    color: #000;
}
/* arrow icon (span tag) */
#back-top span {
    width: 40px;
    height: 26px;
    display: block;
    margin-bottom: 7px;
    background: #00a9fd;
    -webkit-border-radius: 20px;
    -moz-border-radius: 20px;
    border-radius: 20px;
    color:#fff;
    font-size:24px;
    padding-top:14px;
        line-height:0.5;
}
#back-top a:hover span {
    background-color: #000;
    color:#fff;
}