纯css实现大风车加载loading载入页面

此风车效果，用到了 css3 的自定义动画、旋转、圆角、阴影效果来实现

HTML 代码：

<div class="loadpage">
    <div class="load">
        <div class="fan"></div>
        <div class="fan"></div>
        <div class="fan"></div>
        <div class="fan"></div>
        <p>正在加载中，请稍后…</p>
    </div>
</div>

CSS 代码：

.loadpage {
    position: fixed;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    z-index: 999;
}

.load {
    width: 200px;
    height: 200px;
    position: fixed;
    left: 50%;
    top: 50%;
    margin-left: -100px;
    margin-top: -200px;
}

.load p {
    width: 100%;
    color: red;
    position: absolute;
    bottom: -200px;
    left: 0;
    text-align: center;
}

.load:before {
    content: '';
    display: block;
    width: 10px;
    height: 200px;
    background: #f5f5f5;
    position: absolute;
    left: 50%;
    margin-left: -5px;
    top: 50%;
}

.load:after {
    content: '';
    display: block;
    width: 8px;
    height: 8px;
    border: 8px solid #fff;
    position: absolute;
    left: 50%;
    top: 50%;
    margin-left: -12px;
    margin-top: -12px;
    border-radius: 50%;
    z-index: 10;
}

.load .fan {
    width: 50px;
    height: 100px;
    overflow: hidden;
    position: absolute;
    z-index: 9;
    background: #35ada3;
    -webkit-animation: zhuan 2s linear infinite;
    animation: zhuan 2s linear infinite;
}

.load .fan:before {
    content: '';
    display: block;
    position: absolute;
    width: 100px;
    height: 100px;
    background: #bc413c;
    overflow: hidden;
    box-shadow: 0 0 2px 4px rgba(0,0,0,0.1) inset;
}

.load .fan:nth-of-type(1) {
    left: 50px;
    top: 0;
    border-radius: 60px 0 0 0;
    -webkit-transform-origin: 50px 100px;
    transform-origin: 50px 100px;
}

.load .fan:nth-of-type(1):before {
    border-radius: 60px 0 0 240px;
}

.load .fan:nth-of-type(2) {
    width: 100px;
    height: 50px;
    left: 50%;
    top: 50px;
    border-radius: 0 60px 0 0;
    background: #f2c757;
    -webkit-transform-origin: 0 50px;
    transform-origin: 0 50px;
}

.load .fan:nth-of-type(2):before {
    border-radius: 240px 60px  0 0;
}

.load .fan:nth-of-type(3) {
    left: 50%;
    top: 50%;
    border-radius: 0 0 60px 0;
    -webkit-transform-origin: 0 0;
    transform-origin: 0 0;
}

.load .fan:nth-of-type(3):before {
    left: -50px;
    border-radius: 0 240px 60px 0;
}

.load .fan:nth-of-type(4) {
    width: 100px;
    height: 50px;
    left: 0;
    top: 50%;
    border-radius: 0 0 0 60px;
    background: #f2c757;
    -webkit-transform-origin: 100px 0;
    transform-origin: 100px 0;
}

.load .fan:nth-of-type(4):before {
    top: -50px;
    border-radius: 0 0 250px 60px;
}

@-webkit-keyframes zhuan {
    0% {
        transform: rotate(0deg)
    }

    to {
        transform: rotate(-1turn)
    }
}

@keyframes zhuan {
    0% {
        transform: rotate(0deg)
    }

    to {
        transform: rotate(-1turn)
    }
}

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