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console 命令行工具 X clear

                    
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console
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* {
	padding: 0;
	margin: 0;
	vertical-align: top;
}
body {
	background-color: yellow;
}
li {
    list-style-type: none;
}
a {
    color: black;
    text-decoration: none;
}
.logo > img {
	width: 200px;
	float: left;
	margin-right: 20px;
}
.nav > ul {
	width: 100%;
	height: 100px;
	background-color: black;	
}
.nav-list > li {
    width: 200px;
    margin-left: 10px;
	display: inline-block;
	font-size: 20px;
	height: 100px;
	line-height: 100px; 
	overflow: hidden;
}
.nav-list > li:hover {
	overflow: visible;
}
.nav-hover > a {
    color: white;
}
.caret {	
	width: 0;
	height: 0;
	border-left: 5px solid transparent;
	border-right: 5px solid transparent;
	border-top: 10px solid white;
	border-bottom: 10px solid transparent;
    position: absolute;
    top: 45px;
}
.nav-hover ul {
	width: 400px;
	padding-left: 20px;
	float: left;
	font-size: 20px;
	background-color: #fff;
	position: relative;
}
.menu li:hover {
	background-color: #A6FFA6;
}