html,body{  
    height: 100%;  
    width: 100%;  
    margin:0 auto;
}
::-webkit-scrollbar{
    display:none;
}
.ScreenPage{
    background-size: cover;
    height: 100%;
    background-position: center center;
    overflow: hidden;
}
/* 通用按钮样式 */
.ScreenPageBar{
    right:10px;
    padding:10px;
    border-radius: 10px;
    z-index: 99;
}
.ScreenPageBar span{
    display: block;
    width: 10px;
    height: 10px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.329);
    box-shadow: 0px 0px 3px black;
    margin:10px;
    cursor: pointer;
}
.ScreenPageBar span.act{
    background: white;
}