op: 72.32%;
                }
            }

            @-webkit-keyframes move_white-cloud-center {
                from {
                    top: 73.97%;
                }

                to {
                    top: 72.32%;
                }
            }

            @-ms-keyframes move_white-cloud-center {
                from {
                    top: 73.97%;
                }

                to {
                    top: 72.32%;
                }
            }

            #white-cloud-left {
 