超酷CSS3鼠标悬停图片背景动画特效

这是一款超酷CSS3鼠标悬停图片背景动画特效。该特效在鼠标悬停到图片上面的时候，通过CSS3帧动画和filter过滤器来制作非常炫酷的图片遮罩层动画效果。

使用方法

在页面中引入下面的文件。

<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css" />      
    

HTML结构

图片的HTML结果如下：

<div class="container">
    <div class="row">
        <div class="col-md-4 col-sm-6">
            <div class="box">
                <img src="images/img-1.jpg" alt="">
                <div class="box-content">
                    <h3 class="title">Steve Thomas</h3>
                    <span class="post">Web developer</span>
                </div>
                <ul class="icon">
                    <li><a href="#"><i class="fa fa-search"></i></a></li>
                    <li><a href="#"><i class="fa fa-link"></i></a></li>
                </ul>
            </div>
        </div>
        <div class="col-md-4 col-sm-6">
            <div class="box">
                <img src="images/img-2.jpg" alt="">
                <div class="box-content">
                    <h3 class="title">Kristina</h3>
                    <span class="post">Web designer</span>
                </div>
                <ul class="icon">
                    <li><a href="#"><i class="fa fa-search"></i></a></li>
                    <li><a href="#"><i class="fa fa-link"></i></a></li>
                </ul>
            </div>
        </div>
    </div>
</div>
    

CSS样式

然后添加下面的CSS样式。

.box{
    font-family: 'Fira Sans', sans-serif;
    text-align: center;
    overflow: hidden;
    position: relative;
}
.box:before,
.box:after{
    content: '';
    background-color: rgba(255,255,255,0.7);
    height: 25%;
    width: 100%;
    opacity: 0;
    transform: translateX(-50%);
    position: absolute;
    left: 50%;
    top: -100%;
    transition: all 0.3s;
}
.box:after{ top: 100%; }
.box:hover:before{
    transform: translateX(-50%) translateY(0);
    top: 0;
}
.box:hover:after{
    transform: translateX(-50%) translateY(0);
    top: auto;
    bottom: 0;
}
.box:hover:before,
.box:hover:after{
    height: 50%;
    opacity: 1;
    animation: animate 0.5s linear;
}
.box img{
    width: 100%;
    height: auto;
}
.box .box-content{
    width: 100%;
    opacity: 0;
    filter: blur(10px);
    transform: translateX(-50%) translateY(-50%);
    position: absolute;
    top: 60%;
    left: 50%;
    z-index: 1;
    transition: all 0.4s ease 0.1s;
}
.box:hover .box-content{
    opacity: 1;
    filter: blur(0);
    top: 50%;
}
.box .title{
    color: #4834d4;
    font-size: 25px;
    font-weight: 600;
    text-transform: uppercase;
    margin: 0;
}
.box .post{
    color: #444;
    font-size: 15px;
    font-weight: 600;
    text-transform: uppercase;
}
.box .icon{
    padding: 0;
    margin: 0;
    list-style: none;
    opacity: 0;
    transform: translateX(-50%);
    position: absolute;
    left: 50%;
    bottom: 10px;
    z-index: 1;
    transition: all 0.3s ease 0.3s;
}
.box:hover .icon{ opacity: 1; }
.box .icon li{ display: inline-block; }
.box .icon li a{
    color: #fff;
    background-color: #4834d4;
    line-height: 25px;
    height: 30px;
    width: 30px;
    border: 2px solid #fff;
    border-radius: 50%;
    box-shadow: 3px -3px 5px #555;
    display: block;
    transition: all 0.3s;
}
.box .icon li a:hover{
    color: #4834d4;
    background-color: #fff;
    border-color: #4834d4;
}
@keyframes animate{
    80%{ width: 90%; }
    85%{ width: 95%; }
    93%{ width: 85%; }
    100%{ width: 100%; }
}
@media only screen and (max-width:990px){
    .box{ margin-bottom: 30px; }
}
@media only screen and (max-width:479px){
    .box .title{ font-size: 20px; }
}