*{
	margin: 0;
	padding: 0;
}
header {
	display: block;;
	margin: 0 auto;
	width: 500px;
	text-align: center;
}

header h1{
	font-family: "微软雅黑";
	font-size: 60px;
	font-weight: bold;
}

header #newgamebutton {
	display: block;
	margin: 20px auto;
	width: 100px;
	padding: 10px 10px;
	background-color: #8f7a66;
	font-family: "微软雅黑";
	color: #fff;
	border-radius: 10px;
	text-decoration: none;
}

header #newgamebutton:hover {
	background-color: #9f8b77;
}
header p{
	font-family: "微软雅黑";
	font-size: 25px;
	margin:20px auto;
}

#grid-container {
	position: relative;
	margin: 20px auto;
	padding: 20px;
	width: 460px;
	height: 460px;
	background-color: #bbada0;
	border-radius: 10px;
	font-family: "微软雅黑";
}
#grid-container .grid-cell {
	position: absolute;
	width: 100px;
	height: 100px;
	border-radius: 6px;
	background-color: #ccc0b3;
}

#grid-container .number-cell {
	position:absolute;
	border-radius: 6px;
	font-weight:bold;
	font-size:60px;
	line-height:100px;
	text-align:center;
}