*{
	cursor: default;
	font-family: Arial;
}
body,ul,li{
	margin: 0;
	padding: 0;
	list-style: none;
}
body{
	background: #eee;
}
.left{
	position: absolute;
	left: 0;
	top: 0;
	bottom: 0;
	width: 300px;
	background: #383836;
}
.right{
	position: absolute;
	left: 300px;
	top: 0;
	bottom: 0;
	right: 0;
	background:url(../imgs/0.jpg) no-repeat;
	background-size:cover; 
}
.right canvas{
	border: 1px solid #888;
	box-sizing: border-box;
	position: absolute;
	left: 40%;
	top: 50%;
	margin-top: -300px;
	margin-left: -300px;
	box-shadow: 0 0 8px rgba(0,0,0,0.8);
	background: #fff;
}
.left ul li{
	color: #fff;
	text-align: center;
	line-height: 55px;
}
.left .top .a{
	background: url(../imgs/line.png) no-repeat 5px 5px;
	background-size: 70px 70px;
}
.left .top .b{
	background: url(../imgs/era.png) no-repeat 25px 12px;
	background-size: 35px 35px;
}
.left .top .c{
	background: url(../imgs/arc.png) no-repeat 15px 12px;
	background-size: 70px 50px;
}
.left .top .d{
	background: url(../imgs/rect.png) no-repeat 5px 8px;
	background-size: 70px 50px;
}
.left .top .active{
	color:green;
	background-color: #222;
	box-shadow: 0 0 3px rgba(255,255,255,0.8);
}
.left input{
	margin-top: 20px;
	width: 50%;
	margin-bottom: 20px;
}
.left .apan{
	color: #aaa;
	display: block;
	margin-left: 20px;
	float: left;
	line-height: 50px;
}
hr{
	border-color: #888;
	box-shadow: 0 0 3px rgba(255,255,255,0.5);
}
.left div{
	color: #fff;
}
.left div span{
	margin-right: 20px;
	margin-left: 20px;
}
.left a{
	text-decoration: none;
	color: #fff;
}
.button {
    width: 100px;
    line-height: 38px;
    text-align: center;
    font-weight: bold;
    color: #fff;
    text-shadow: 1px 1px 1px #333;
    border-radius: 5px;
    margin: 10px 0px 10px 30px;
    position: relative;
    overflow: hidden;
    display: block;
    float: left;
}
.button.black {
    border: 1px solid #333;
    box-shadow: 0 1px 2px #8b8b8b inset,0 -1px 0 #3d3d3d inset,0 -2px 3px #8b8b8b inset;
    background: -webkit-linear-gradient(top,#656565,#4c4c4c);
    background: -moz-linear-gradient(top,#656565,#4a4a4a);
    background: linear-gradient(top,#656565,#4a4a4a);
}
.black:active{
	top:1px;
	box-shadow: 0 1px 3px #111 inset,0 3px 0 #fff;
	background: -webkit-linear-gradient(top,#424242,#575757);
	background: -moz-linear-gradient(top,#424242,#575757);
	background: linear-gradient(top,#424242,#575757);
}
.black:hover {
    background: -webkit-linear-gradient(top,#818181,#575757);
    background: -moz-linear-gradient(top,#818181,#575757);
    background: linear-gradient(top,#818181,#575757);
}

.left .top{
	height: 130px;
}
.left .top li{
	width: 50%;
	box-sizing: border-box;
	float: left;
}