*{
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}
body{
	width: 100vw;
	height: 100vh;
	display: flex;
	flex-direction: column;
	justify-content:flex-start;
}
.caidan{
	height: 100px;
	width: 100vw;
	display: flex;
	border-bottom: 3px solid #ccc;
	justify-content:space-around;
	align-items: center;
}
#canvas{
	flex: 1;
	width: 100vw;
}
.btn,.btn2{
	width: 150px;
	height: 50px;
	border: 1px solid #ccc;
	border-radius:  20px;
	text-align: center;
	line-height: 50px;
	color: #999;
	background-size: auto 100%;
	background-position: center;
	background-repeat: no-repeat;
}
.btn1{
	width: 150px;
	height: 50px;
	border: 1px solid #ccc;
	border-radius:  20px;
	text-align: center;
	line-height: 50px;
	color: #999;
	background-size: auto 100%;
	background-position: center;
	background-repeat: no-repeat;
}

.btn.active{
	box-shadow: 0 0 20px deepskyblue;
	border: 1px solid deepskyblue;
}
.btn1.active{
	box-shadow: 0 0 20px deepskyblue;
	border: 1px solid deepskyblue;
}

.line{
	display: flex;
	justify-content: center;
	align-items: center;
}
.xi:after{
	content: "";
	background: #333;
	width:6px;
	height: 6px;
	display: block;
	border-radius: 3px;
}
.normal:after{
	content: "";
	background: #333;
	width:16px;
	height: 16px;
	display: block;
	border-radius: 8px;
}
.cu:after{
	content: "";
	background: #333;
	width:32px;
	height: 32px;
	display: block;
	border-radius: 16px;
}