body{
	background: url(../img/bjt.png);
	background-repeat:no-repeat ;
	background-size:cover ;
}
.all{
	width: 1000px;
	/*border: 1px solid;*/
	height: 700px;
	margin: 20px auto;
	padding: 10px;
	border: 2px solid;
	background: gainsboro;
	position: relative;
}
.logo{
	height: 200px;
	width: 250px;
	/*border: 1px solid;*/
	float: left;
	padding: 10px;
}
.title{
	height: 200px;
	width: 700px;
	/*border: 1px solid;*/
	float: right;
	padding: 2px;
	text-align:center;
}
.timu{
	text-align: center;
	line-height:160px ;		
}
.choice{
	display: flex;
	height: 50px;
	width: 1000px ;
	border: 1px solid;
	background: gray;
	float: left;
	justify-content: space-around;
}
a{
	text-decoration: none;
	color: black;
}
a:hover{
	color: blue;
}

#main{
	height: 350px;
	margin: 10px auto;
	width: 500px;
	text-align: center;
	font-size: 30px;
	float: right;
	border: 1px pink dashed;
	border-radius: 15%;
	position: relative;
	top:150px ;
	right: 100px;
	/*background-color: white;*/
	background: rgba(255,255,255,0.5);
}
#main li{
	list-style: none;
	height: 65px;
}
#user,#mm,#qmm{
	width: 250px;
	height: 50px;
	border: #000 1px solid;
	background: #ffd5e1;
	margin-top:20px ;
}
#user:hover,#mm:hover,#qmm:hover{
	background: white;
}
.di{
	height: 50px;
	width: 900px;
	float: left;
	margin-left: -10px;
	margin-top: 10px;
	position: absolute;
	bottom: 65px;
}
.right{
	height: 50px;
	width: 100px;
	font-size: 20px;
	background: rgba(187, 214, 233,0.9);
	border:1px hotpink dashed;
	/*line-height: 50px;*/
	border-radius: 10%;
	float: right;
	border-radius: 10%;
}
#mybn:hover,.right:hover{
	background: rgba(255, 213, 225,0.9);
	color: cornflowerblue;
}
.tijiao{
	height: 50px;
	width: 300px;
	/*float: center;*/
	/*border: 2px solid;*/
	margin-top: 30px;
	margin-left: 110px;
}
#mybn{
	/*outline: none;
	border: 0;
	background-color: deepskyblue;*/
	height: 50px;
	width: 100px;
	font-size: 20px;
	/*line-height: 50px;*/
	background: rgba(187, 214, 233,0.9);
	border:1px hotpink dashed;
	border-radius: 10%;
	float: left;
}
.back{
	height: 40px;
	width: 40px;
	position: absolute;
	top: 10px;
	right: 20px;
	border: 1px hotpink dotted;
	border-radius: 10%;
	background: url(../img/back.png);
}