body{
							margin: 0;
							padding: 0;	
							background-color: rgb(240,240,240);		
						}
						#box{
							width: 1200px;
							height: 1700px;
							margin: auto;
							background-color: white;
						}
						.xa{
							margin-top: -50px;
						}
					    nav{
							width: 1200px;
							height: 60px;
							background-color: black;
							position: relative;
							margin-top: -80px;
						}
						nav li{
							display: inline-block;
							margin-left: 68px;
							margin-top: 15px;
						}
						a{
							color: white;
							text-decoration: none;
							font-size: 20px;
							font-weight: bold;
						}
						.x{
							font-family: 华文行楷;
							font-size: 140px;
							margin-top: -450px;
							color: wheat;
							margin-left: 80px;
						}
						.an{
							font-family: 华文行楷;
							font-size: 140px;
							margin-top: -220px;
							color: wheat;
							margin-left: 150px;
						}
						a:hover{
							background-color: white;
							color: black;
						}
						.dq{
							text-align: center;
							margin-top: 250px;
							font-size: 20px;
							color: gray;
						}
						.zi11{
							width: 1100px;
							margin-left: 50px;
							margin-top: 40px;
							font-family: 宋体;
						}
						.m1{
							margin-left: 50px;
							margin-top: 40px;
						}
						.m2{
							margin-left: 20px;
						}
						.m3{
							margin-left: 50px;
							margin-top: 20px;
						}
						.m4{
							margin-left: 42px;
						}
						.foot{
							width: 1200px;
							height: 80px;
							margin-top: 80px;
							background-color:black;
						}
				        .di{
							color: white;
							text-align: center;
							padding-top: 25px;
						}