这是两款炫酷CSS3 Loading加载动画特效。该loading加载动画使用CSS3 animation来制作动画特效，可用于页面预加载时的动画效果。

HTML结构

该CSS3 Loading加载动画特效：

<div class="loader-1">
  <div class="loader-inner"></div>
  <div class="loader-inner"></div>
  <div class="loader-inner"></div>
</div>
<div class="loader-2">
  <div class="loader-inner"></div>
  <div class="loader-inner"></div>
  <div class="loader-inner"></div>
  <div class="loader-inner"></div>
  <div class="loader-inner"></div>
</div>

CSS样式

Loading-1的CSS样式如下：

.loader-1{
    width: 220px;
    height: 200px;
    margin: 0 auto;
}
.loader-1 .loader-inner{
    width: 160px;
    height: 100px;
    border-radius: 5px;
    background: #2e2f26;
    margin: -50px 0 0 -80px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform-type: preserve-3d;
    animation: loading-11 3s cubic-bezier(0.55, 0.3, 0.24, 0.99) infinite;
}
.loader-1 .loader-inner:nth-child(2){
    width: 150px;
    height: 90px;
    border-radius: 3px;
    background: #ee6400;
    margin: -45px 0 0 -75px;
    z-index: 1;
    animation-name: loading-12;
}
.loader-1 .loader-inner:nth-child(3){
    width: 40px;
    height: 20px;
    border-radius: 0 0 5px 5px;
    background: #ebcc08;
    margin: 50px 0 0 -20px;
    z-index: 2;
    animation-name: loading-13;
}
@keyframes loading-11{
    3%,
    97%{
        width: 160px;
        height: 100px;
        margin-top: -50px;
        margin-left: -80px;
    }
    30%,
    36%{
        width: 80px;
        height: 120px;
        margin-top: -60px;
        margin-left: -40px;
    }
    63%,
    69%{
        width: 40px;
        height: 80px;
        margin-top: -40px;
        margin-left: -20px;
    }
}
@keyframes loading-12{
    3%,
    97%{
        width: 150px;
        height: 90px;
        margin-top: -45px;
        margin-left: -75px;
    }
    30%,
    36%{
        width: 70px;
        height: 96px;
        margin-top: -48px;
        margin-left: -35px;
    }
    63%,
    69%{
        width: 32px;
        height: 60px;
        margin-top: -30px;
        margin-left: -16px;
    }
}
@keyframes loading-13{
    3%,
    97%{
        width: 40px;
        height: 20px;
        margin-top: 50px;
        margin-left: -20px;
    }
    30%,
    36%{
        width: 8px;
        height: 8px;
        margin-top: 49px;
        margin-left: -5px;
        border-radius: 8px;
    }
    63%,
    69%{
        width: 16px;
        height: 4px;
        margin-top: -37px;
        margin-left: -8px;
        border-radius: 10px;
    }
}

Loading-2的CSS样式如下：