*{
    margin: 0;
    padding: 0;
}
html,body{
    width: 100%;    
    height: 100%;   
    position: absolute; 
    left: 0;top: 0; 
    overflow: hidden;   
    overflow-y: auto;
    background-color: #f5f5f5;
    &::-webkit-scrollbar{width:0px}
}