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前端富爷 冲！！！！

完整代码如下：

Css样式：

    * {
        padding: 0;
        margin: 0;
    }

    body {
        position: relative;
        background-color: #ccc;
        overflow: hidden;
    }

    .bear {
        position: absolute;
        top: 800px;
        overflow: hidden;
        width: 200px;
        height: 100px;
        z-index: 999;
        background: url(images/bear.png);
        animation: move 3s ease forwards, bear .5s steps(8) infinite;
    }

    .mon {
        height: 700px;
    }

    .mon .bg1 {
        position: absolute;
        left: 0;
        top: 600px;
        width: 3480px;
        height: 300px;
        z-index: 2;
        background: url(images/bg1.png) repeat-x;
        animation: bg1 10s linear infinite;
        animation-delay: 1s;
    }

    .mon .bg2 {
        position: absolute;
        left: 0;
        top: 500px;
        width: 3480px;
        height: 400px;
        z-index: 1;
        background: url(images/bg2.png) repeat-x;
        animation: bg2 20s linear infinite;
        animation-delay: 1s;
    }

    @keyframes bear {
        0% {
            background-position: 0 0;
        }

        100% {
            background-position: -1600px 0;
        }
    }

    @keyframes move {
        0% {
            left: 0;
        }

        100% {
            left: 50%;
            transform: translateX(-50%);
        }
    }

    @keyframes mon {
        0% {
            transform: scale(1.5);
        }

        100% {
            transform: scale(1);
        }
    }

    @keyframes bg1 {
        0% {
            background-position: 0 0;
        }

        100% {
            background-position: -3840px 0;
        }
    }

    @keyframes bg2 {
        0% {
            background-position: 0 0;
        }

        100% {
            background-position: -3840px 0;
        }
    }

HTML结构：

<div class="bear">
</div>
<!-- <img src="images/bear.png" alt=""> -->
<div class="mon">
    <div class="bg1"></div>
    <div class="bg2"></div>
</div>