.a_background {
    width: 100%;
    height: 100%;
    position: absolute
}

.a_background_top {
    width: 100%;
    height: 71.6%;
    background-image: url("../images/background/a_background_top.png");
    background-size: 100% 100%
}

.a_background_middle {
    width: 100%;
    height: 13.1%;
    background-image: url("../images/background/a_background_middle.png");
    background-size: 100% 100%
}

.a_background_botton {
    width: 100%;
    height: 15.3%;
    background-image: url("../images/background/a_background_botton.png");
    background-size: 100% 100%
}

.cloud {
    z-index: 2;
    position: absolute
}

.cloud1 {
    width: 100%;
    height: 30%;
    left: -5%;
    top: 15%;
    background: url("../images/cloud1.png") no-repeat;
    -webkit-animation-name: smallCloud;
    -webkit-animation-duration: 30s;
    -webkit-animation-iteration: infinite;
    -moz-animation-name: smallCloud;
    -moz-animation-duration: 30s;
    -moz-animation-iteration: infinite
}

.cloud2 {
    width: 100%;
    height: 100%;
    right: -5%;
    background: url("../images/cloud2.png") no-repeat;
    -webkit-animation-name: largeCloud;
    -webkit-animation-duration: 50s;
    -webkit-animation-iteration: infinite;
    -moz-animation-name: largeCloud;
    -moz-animation-duration: 50s;
    -moz-animation-iteration: infinite
}

@-webkit-keyframes smallCloud {
    0% {
        left: -5%
    }
    100% {
        left: 100%
    }
}

@-moz-keyframes smallCloud {
    0% {
        left: -5%
    }
    100% {
        left: 100%
    }
}

@-webkit-keyframes largeCloud {
    0% {
        right: -5%
    }
    100% {
        right: 100%
    }
}

@-moz-keyframes largeCloud {
    0% {
        right: -5%
    }
    100% {
        right: 100%
    }
}

#sun {
    background: url("../images/sun.png") no-repeat;
    position: absolute;
    z-index: 1;
    top: -30px;
    height: 201px;
    width: 201px;
    right: 100px;
    -webkit-transform: rotate(45deg);
    -webkit-animation-name: rotation;
    -webkit-animation-duration: 60s;
    -webkit-animation-iteration: 1;
    -webkit-animation-fill-mode: forwards;
    -moz-transform: rotate(45deg);
    -moz-animation-name: rotation;
    -moz-animation-duration: 60s;
    -moz-animation-iteration: 1;
    -moz-animation-fill-mode: forwards
}

@-webkit-keyframes rotation {
    0% {
        transform: translateX(0) translateY(0) rotate(45deg)
    }
    100% {
        transform: translateX(-2000px) translateY(400px) rotate(70deg)
    }
}

@-moz-keyframes rotation {
    0% {
        transform: translateX(0) translateY(0) rotate(45deg)
    }
    100% {
        transform: translateX(-2000px) translateY(400px) rotate(70deg)
    }
}