body{ margin: 0; padding: 0;font-size: 14px;font-family: "微软雅黑"; min-height: 1500px;}
#banner{width: 100%; float: left;background: url(../images/banner-bg.png); 
position: relative; background-size:2% ;}
#banner img{width: 50%; margin-top: 50px;}
#logo{position: absolute; left: 3%; top: 3%; width: 170px;height: 250px; z-index: 99;}
#logo img{width: 100%;}
#menu{width: 100%; background: #1da5dc; height: 250px; float: left;}
.container{width: 925px; margin: 0 auto;}
#menu ul{ margin: 50px 0 0 0;padding: 0;}
#menu li{color: #ffffff;list-style: none; float: left;width: 154px;text-align: center;
font-size: 16px; line-height: 2;}
.img{margin: 150px 0 0 0;float: left; border-bottom: #e8e8e8 solid 1px; padding-bottom: 150px;}
.img1,.img2,.img3,.img4,.img5,.img6,.img7,.img8{}
.img7,.img8{margin: 100px 0 0 0; padding-bottom: 50px ;}
footer{background: #39434f;width: 100%; float: left; height: 20px;}
#returntop{width: 55px; height: 55px;background: #dddddd; border-radius: 5px;position: fixed; right: 5%; 
bottom: 15%;color: #ffffff;text-align: center;font-size: 20px;display: none;}
#returntop i,#returntop span{height: 20px; width: 2px;float: left; border-left:#ffffff solid 2px ;
transform:rotate(45deg);
-ms-transform:rotate(45deg); 	/* IE 9 */
-moz-transform:rotate(45deg); 	/* Firefox */
-webkit-transform:rotate(45deg); /* Safari 和 Chrome */
-o-transform:rotate(45deg); 	/* Opera */; margin: 17px 0 0 19px;}
#returntop span{transform:rotate(-45deg);
-ms-transform:rotate(-45deg); 	/* IE 9 */
-moz-transform:rotate(-45deg); 	/* Firefox */
-webkit-transform:rotate(-45deg); /* Safari 和 Chrome */
-o-transform:rotate(-45deg); 	/* Opera */; margin: 16px 0 0 10px!important;}
#returntop:hover i,#returntop:hover span{border-left:#1da5dc solid 2px ;}