body {
    font-family: microsoft yahei, sans-serif;
    tap-heilight-color:transparent;
    -webkit-tap-highlight-color: transparent;
    padding:0;
    margin:0;
    border:0;
}

.sky {
    height: 480px;
    background: #007fd5;
    position: relative;
    overflow: hidden;
    -webkit-animation: sky_background 50s ease-out infinite;
    -moz-animation: sky_background 50s ease-out infinite;
    -o-animation: sky_background 50s ease-out infinite;
    animation: sky_background 50s ease-out infinite;
    -webkit-transform: translate3d(0, 0, 0);
    -ms-transform: translate3d(0, 0, 0);
    -o-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
}

.clouds_one {
    background: url("../images/page-4/cloud_one.png");
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 300%;
    -webkit-animation: cloud_one 50s linear infinite;
    -moz-animation: cloud_one 50s linear infinite;
    -o-animation: cloud_one 50s linear infinite;
    animation: cloud_one 50s linear infinite;
    -webkit-transform: translate3d(0, 0, 0);
    -ms-transform: translate3d(0, 0, 0);
    -o-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
}

.clouds_two {
    background: url("../images/page-4/cloud_two.png");
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 300%;
    -webkit-animation: cloud_two 75s linear infinite;
    -moz-animation: cloud_two 75s linear infinite;
    -o-animation: cloud_two 75s linear infinite;
    animation: cloud_two 75s linear infinite;
    -webkit-transform: translate3d(0, 0, 0);
    -ms-transform: translate3d(0, 0, 0);
    -o-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
}

.clouds_three {
    background: url("../images/page-4/cloud_three.png");
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 300%;
    -webkit-animation: cloud_three 100s linear infinite;
    -moz-animation: cloud_three 100s linear infinite;
    -o-animation: cloud_three 100s linear infinite;
    animation: cloud_three 100s linear infinite;
    -webkit-transform: translate3d(0, 0, 0);
    -ms-transform: translate3d(0, 0, 0);
    -o-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
}

@-webkit-keyframes sky_background {
    0% {
        background: #007fd5;
        color: #007fd5
    }
    50% {
        background: #000;
        color: #a3d9ff
    }
    100% {
        background: #007fd5;
        color: #007fd5
    }
}
@-moz-keyframes sky_background {
    0% {
        background: #007fd5;
        color: #007fd5
    }
    50% {
        background: #000;
        color: #a3d9ff
    }
    100% {
        background: #007fd5;
        color: #007fd5
    }
}
@keyframes sky_background {
    0% {
        background: #007fd5;
        color: #007fd5
    }
    50% {
        background: #000;
        color: #a3d9ff
    }
    100% {
        background: #007fd5;
        color: #007fd5
    }
}

@-webkit-keyframes cloud_one {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}
@-moz-keyframes cloud_one {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}
@keyframes cloud_one {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}

@-webkit-keyframes cloud_two {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}
@-moz-keyframes cloud_two {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}
@keyframes cloud_two {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}

@-webkit-keyframes cloud_three {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}
@-moz-keyframes cloud_three {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}
@keyframes cloud_three {
    0% {
        left: 0
    }
    100% {
        left: -200%
    }
}
.guns {
    opacity: 1;
    width: 100%;
    height: 100%;
    /*background: url("../images/pure.jpg") no-repeat center center;*/
    -webkit-background-size: cover;
    background-size:cover;
    position: fixed;
}