nav {
	width: 540px;
	font-size: 15px;
	position: absolute;
	z-index: 990;
	top: 64px;
	left: 324px;
}
#main_ul  {
	text-align: center;
	white-space: nowrap;
	width: 540px;
	min-width: 540px;
}
#main_ul li  {
	display: inline-block;
	margin-right: 30px;
	position: relative;
	cursor: pointer;
	-webkit-transition: 0.5s;
	-moz-transition: 0.5s;
	-o-transition: 0.5s;
	-ms-transition: 0.5s;
	transition: 0.5s;
	font-size: 18px;
	margin-left: 30px;
}
#main_ul li a {
	-webkit-transition: 0.5s;
	-moz-transition: 0.5s;
	-o-transition: 0.5s;
	-ms-transition: 0.5s;
	transition: 0.5s;
	font-size: 20px;
}
#main_ul li a:hover{
	color: #B9B9B9;
}

.fixed {
	position: fixed;
	width: 100%;
}

@media (max-width: 540px){
#menuButton {
	display: block;
	width: 55px;
	height: 55px;
	position: fixed;
	top: 23px;
	right: 39px;
	z-index: 3;
	border-radius: 5px;
	border: 1px solid #000000;
	cursor: pointer;
}
#menuButton span {
	display: block;
	background: #000;
	width: 35px;
	height: 2px;
	position: absolute;
	left: 9px;
	transition: all 0.4s;
	-webkit-transition: all 0.4s;
	-moz-transition: all 0.4s;
}
#menuButton span:first-child {
	top: 15px;
}
#menuButton span:nth-child(2) {
	margin-top: -1px;
	top: 50%;
}
#menuButton span:last-child {
	bottom: 15px;
}
#menuButton.active span:first-child {
	-webkit-transform: translateY(10px) rotate(45deg);
	-moz-transform: translateY(10px) rotate(45deg);
	-ms-transform: translateY(10px) rotate(45deg);
	transform: translateY(10px) rotate(45deg);
}
#menuButton.active span:nth-child(2) {
	opacity: 0;
}
#menuButton.active span:last-child {
	-webkit-transform: translateY(-10px) rotate(-45deg);
	-moz-transform: translateY(-10px) rotate(-45deg);
	-ms-transform: translateY(-10px) rotate(-45deg);
	transform: translateY(-10px) rotate(-45deg);
	border-radius: 10px;
	border: 1px solid hsla(0,0%,0%,1.00);
}
#nav_button{
	position: absolute;
	right: 30px;
}
nav {
	position: absolute;
	left: 0px;
	z-index: 200;
	top: 100px;
	margin-left: 0px;
	padding: 0px;
	width: 540px;
	height: 0;
}
#main_ul  {
	text-align: center;
	padding: 30px 0px;
	width: 540px;
	display: none;
	background-color: hsla(0,0%,100%,0.90);
	white-space: normal;
	-webkit-box-shadow: 0px 10px 10px 0px hsla(0,0%,0%,0.28);
	box-shadow: 0px 10px 10px 0px hsla(0,0%,0%,0.28);
}
#main_ul li  {
	display: inline-block;
	position: relative;
	cursor: pointer;
	-webkit-transition: 0.5s;
	-moz-transition: 0.5s;
	-o-transition: 0.5s;
	-ms-transition: 0.5s;
	transition: 0.5s;
	border-radius: 5px;
	border: 1px solid hsla(0,0%,56%,1.00);
	text-align: center;
	padding: auto;
	width: 40%;
	color: hsla(0,0%,0%,1.00);
	margin-right: 10px;
	margin-left: 10px;
	margin-bottom: 30px;
}
#main_ul li a {
	-webkit-transition: 0.5s;
	-moz-transition: 0.5s;
	-o-transition: 0.5s;
	-ms-transition: 0.5s;
	transition: 0.5s;
	color: #000;
	width: 100%;
	height: 100%;
	display: inline-block;
	background-color: hsla(0,0%,100%,0.21);
	padding: 10px;
	border-radius: 5px;
}
#main_ul li a:hover{
	color: #fff;
	background-color: hsla(0,0%,0%,1.00);
}
}