body {
	background: #141414;
	height: 100%;
	color: #888;
	font: 12px/160% Tahoma, Arial, "微软雅黑", "Hiragino Sans GB", "新宋体";
}

@media screen and (min-width: 811px) {
	/***  主导航 ***/
	.wrap {
		width: 990px;
		margin: auto;
	}
}
@media screen and (max-width: 810px) {
	/***  主导航 ***/
	.wrap {
		width: auto;
		margin: auto;
	}
}

.hide {
	display: none;
}

.show {
	display: block;
}