.snow-container {
                position: fixed;
                width: 100%;
                max-width: 100%;
                z-index: 99999;
                pointer-events: none;
                overflow: hidden;
                top: 0;
                height: 100%;
            }
            
            .snow {
                display: block;
                position: absolute;
                z-index: 2;
                top: 0;
                right: 0;
                bottom: 0;
                left: 0;
                pointer-events: none;
                -webkit-transform: translate3d(0, -100%, 0);
                transform: translate3d(0, -100%, 0);
                -webkit-animation: snow linear infinite;
                animation: snow linear infinite;
            }
            
            .snow.foreground {
                background-image: url("https://itexpress.vn/API/files/img/snow-medium.png");
                -webkit-animation-duration: 15s;
                animation-duration: 10s;
            }
            
            .snow.foreground.layered {
                -webkit-animation-delay: 7.5s;
                animation-delay: 7.5s;
            }
            
            .snow.middleground {
                background-image: url(https://itexpress.vn/API/files/img/snow-medium.png);
                -webkit-animation-duration: 20s;
                animation-duration: 15s;
            }
            
            .snow.middleground.layered {
                -webkit-animation-delay: 10s;
                animation-delay: 10s;
            }
            
            .snow.background {
                background-image: url(https://itexpress.vn/API/files/img/snow-medium.png);
                -webkit-animation-duration: 25s;
                animation-duration: 20s;
            }
            
            .snow.background.layered {
                -webkit-animation-delay: 12.5s;
                animation-delay: 12.5s;
            }
            
            @-webkit-keyframes snow {
                0% {
                    -webkit-transform: translate3d(0, -100%, 0);
                    transform: translate3d(0, -100%, 0);
                }
                100% {
                    -webkit-transform: translate3d(5%, 100%, 0);
                    transform: translate3d(5%, 100%, 0);
                }
            }
            
            @keyframes  snow {
                0% {
                    -webkit-transform: translate3d(0, -100%, 0);
                    transform: translate3d(0, -100%, 0);
                }
                100% {
                    -webkit-transform: translate3d(5%, 100%, 0);
                    transform: translate3d(5%, 100%, 0);
                }
            }