body,html,div{padding:0;margin:0}body{position:relative}.container{background:#2d3244}.container .container-b{position:relative;margin:0 auto 0;width:375px;height:604.5px;background:url("../img/bg.png") 0 0/100% 100% no-repeat}.container .container-b .button{height:49px}.container .container-b .button1{position:absolute;top:271px;width:100%}.container .container-b .button2{position:absolute;top:336.5px;width:100%}.mask-top-container{position:fixed;top:0;background:rgba(14,16,21,0.47)}.mask-top-container .mask-b{position:absolute;width:355px;height:115px;left:0;right:0;margin:9.5px auto;background:url("../img/mask.png") center center/100% 100% no-repeat}