html{box-sizing:border-box;-webkit-scroll-behavior:smooth;-moz-scroll-behavior:smooth;-ms-scroll-behavior:smooth;scroll-behavior:smooth;}body{margin:0;}a{-webkit-text-decoration:none;text-decoration:none;}p{margin:0;}*,*:before,*:after{box-sizing:inherit;}*{-webkit-font-smoothing:antialiased;}body{margin:0;padding:0;background-color:#fff;font-family:"Microsoft YaHei";}.container{position:relative;max-width:750px;min-width:300px;margin:0 auto;background-color: #41b35b;}.container .background{max-width:100%;font-size:0;line-height:0;vertical-align:top;margin-top:-0.9px;}.container .piece-column{position:relative;line-height:0;font-size:0;}.container .download{position:absolute;left:10%;right:10%;height:6rem;}.container .nav-btn{top:0;right:0;left:50%;}.container .down-btn02{bottom:0;height:8rem;}.container .down-btn03{top:28%;}.container .down-btn04{bottom:2%;}.container .down-btn05{bottom:1%;height:8rem;}