这是一款CSS3鼠标hover图片超酷遮罩层动画特效。该特效中，当鼠标悬停在图片上面的时候，左右两个遮罩层会向中间收缩，最后合成一个完整的遮罩层。

使用方法

在HTML文件中引入。

HTML结构

<div class="container">
    <div class="row">
        <div class="col-md-4 col-sm-6">
            <div class="box">
                <img src="images/img-1.jpg">
                <div class="box-content">
                    <h3 class="title">Williamson</h3>
                    <span class="post">Web designer</span>
                    <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 class="col-md-4 col-sm-6">
            <div class="box">
                <img src="images/img-2.jpg">
                <div class="box-content">
                    <h3 class="title">Miranda Roy</h3>
                    <span class="post">Web developer</span>
                    <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>
</div>
                

CSS

.box{
    font-family: 'Dosis', sans-serif;
    position: relative;
    overflow: hidden;
}
.box:before,
.box:after{
    content: '';
    background: linear-gradient( #000dff 0%,#6b73ff 100%);
    height: 150%;
    width: 100%;
    border-radius: 0 100% 0 0;
    opacity: 0;
    position: absolute;
    left: -50%;
    top: 100%;
    z-index: 1;
    transition: border-radius .5s ease-out,top .5s ease-out,opacity .3s ease-out;
}
.box:after{
    border-radius: 100% 0 0 0;
    left: 50%;
}
.box:hover:before,
.box:hover:after{
    top: -50%;
    opacity: 0.9;
    border-radius: 0 35% 0 0;
}
.box:hover:after{ border-radius: 35% 0 0 0; }
.box img{
    width: 100%;
    height: auto;
}
.box .box-content{
    color: #fff;
    text-align: center;
    width: 80%;
    opacity: 0;
    transform: translateX(-50%) translateY(-50%);
    position: absolute;
    top: 50%;
    left: 50%;
    z-index: 2;
    transition: all 0.3s ease 0.2s;
}
.box:hover .box-content{ opacity: 1; }
.box .title{
    font-size: 25px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 0 0 7px;
}
.box .post{
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: capitalize;
    margin: 0 0 10px;
    display: block;
}
.box .icon{
    padding: 0;
    margin: 0;
    list-style: none;
}
.box .icon li{
    margin: 0 5px;
    display: inline-block;
}
.box .icon li a{
    color: #fff;
    background: transparent;
    font-size: 14px;
    line-height: 31px;
    height: 35px;
    width: 35px;
    border: 1px solid #fff;
    border-bottom: none;
    border-right: none;
    border-radius: 50%;
    display: block;
    transition: all 0.3s ease;
}
.box .icon li  a:hover{
    color: #fff;
    box-shadow: 0 0 10px #000;
}
@media only screen and (max-width:990px){
    .box { margin: 0 0 30px; }
}
                

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