#all{position:relative;width:100%;height:13.34rem;background:url(../img/bg_m.png?v=b010ef40.png) no-repeat 0 0;background-size:100% 100%;overflow:hidden}.bg_characters{position:absolute;left:0;top:0;width:100%}.bg_characters img{display:block;width:100%;height:auto}.present_btn{position:absolute;width:1.38rem;height:1.62rem;background:url(../img/present_btn.png?v=9b08369a.png) no-repeat 0 0;background-size:100% 100%;right:.23rem;top:8.04rem}.preface{position:absolute;width:100%;left:0;bottom:0}.preface img{display:block;width:100%;height:auto}.preface .logo{position:absolute;width:7.34rem;height:3.11rem;bottom:1.26rem;left:50%;margin-left:-3.67rem;background:url(../img/logo.png?v=aaa61f96.png) no-repeat 0 0;background-size:100% 100%}.preface .slogan{position:absolute;bottom:1.39rem;left:50%;margin-left:-3.01rem;width:6.02rem;height:.48rem;background:url(../img/slogan.png?v=b7391f21.png) no-repeat 0 0;background-size:100% 100%}.btns{position:absolute;width:6.46rem;left:50%;margin-left:-3.23rem;height:.86rem;bottom:.36rem}.btns .button{border:none;outline:0;width:3.02rem;height:.86rem}.btns .ios{float:left;background:url(../img/ios.png?v=0483cf66.png) no-repeat 0 0;background-size:100% 200%}.btns .ios:active{background:url(../img/ios.png?v=0483cf66.png) no-repeat 0 bottom;background-size:100% 200%}.btns .android{float:right;background:url(../img/android.png?v=786fc025.png) no-repeat 0 0;background-size:100% 200%}.btns .android:active{background:url(../img/android.png?v=786fc025.png) no-repeat 0 bottom;background-size:100% 200%}