* {
	margin: 0;
	padding: 0;
}
body {
	font-family: "microsoft yahei";
	background-color: #eee;
}
#chenkbox {
	margin: 100px auto;
	width: 800px;
	position: relative;
}
table {
	width: 100%;
	border-collapse: collapse;
	border-spacing: 0;
	table-layout: fixed;
	background-color: #fff;
}
th {
	background: #ebf3f0;
	font-size: 13px;
	color: #000002;
	height: 25px;
	cursor: pointer;
}
th, td {
	text-align: center;
	border: 1px solid #dcdbdb;
	padding: 5px 10px;
}
#box {
	position: absolute;
	display: none;
	background: #fff;
	text-align: center;
	top: 0;
	background-color: #000;
	background-color: rgba(0,0,0,0.8);
	color: #fff;
	height: 100%;
	cursor: move;
}
#box p {
	line-height: 2;
}