html,body{width:100%;height:100%;}
.main{width:97%;margin:0 auto;}
.mainWrap{width:100%;height:100%;background:url(../img/tuiguang_bd.jpg) no-repeat center bottom;background-size:cover;}
.downGame{position: absolute;bottom: 7%; left:25%;width:50%;}
.downGame img{width:100%;height: auto;}
.downGame1{position: absolute;bottom: 6.5%; margin:0 auto;width:80%;}
.downGame1 img{display: block; width: 40%; height: auto; max-height: 2.3rem;margin:0 auto; padding: 0.5rem 0 0 1.3rem;}

.mainTuiguang{z-index:-100;background:url(../img/tuiguang.png) no-repeat center bottom;background-size:cover; width:100%;height:100%;background-size:100% 100%;position:absolute; filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='../img/tuiguang.png',sizingMethod='scale'); }
.mask{width:100%;height:100%;position: absolute;left: 0; top: 0;z-index: 10;background:rgba(0,0,0,.85) url(../img/bg-1.png)no-repeat top right;display: none;background-size: 75%;}
.mainTuiguangbaidu{z-index:-100;background:url(../img/tuiguang_bd.jpg) no-repeat center bottom;background-size:cover; width:100%;height:100%;background-size:100% 100%;position:absolute; filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='../img/tuiguang.png',sizingMethod='scale'); }