Подробное описание и демонстрацией работы эффекта наведения под номером №100 для бибилиотеки Bootstrap. Html и CSS код для реализации hover effect как на изображении.

html разметка для реализации данного эффекта

<div class="container">
<div class="row">
<div class="col-md-4 col-sm-6">
<div class="box">
<img src="https://fokit.ru/demo/images/hover-effect/hover-effect-style-100/img-1.jpg" alt=""/>
<div class="box-layer">
<div class="box-circle">
<div class="layer left-layer"></div>
<div class="layer top-layer"></div>
<div class="layer right-layer"></div>
<div class="layer bottom-layer"></div>
<div class="icon"><i class="fa fa-crosshairs"></i></div>
</div>
</div>
<div class="box-content">
<h4 class="title">willimson</h4>
<p class="description"> Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam condimentum sagittis nibh eu ullamcorper. Fusce. </p>
<a class="btn" href="#">read more</a>
</div>
</div>
</div>

<div class="col-md-4 col-sm-6">
<div class="box">
<img src="https://fokit.ru/demo/images/hover-effect/hover-effect-style-100/img-2.jpg" alt=""/>
<div class="box-layer">
<div class="box-circle">
<div class="layer left-layer"></div>
<div class="layer top-layer"></div>
<div class="layer right-layer"></div>
<div class="layer bottom-layer"></div>
<div class="icon"><i class="fa fa-crosshairs"></i></div>
</div>
</div>
<div class="box-content">
<h4 class="title">Kristiana</h4>
<p class="description"> Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam condimentum sagittis nibh eu ullamcorper. Fusce. </p>
<a class="btn" href="#">read more</a>
</div>
</div>
</div>
</div>
</div>

css разметка для реализации данного эффекта

.box{
text-align: center;
overflow: hidden;
position: relative;
}
.box img{
width: 100%;
height: auto;
}
.box .box-layer{
width: 180px;
height: 120px;
background: rgba(44, 150, 117, 0.8);
margin: 0 auto;
position: absolute;
top: 35%;
left: 0;
right: 0;
-moz-transition: transform 0.2s linear 0s, opacity 0.2s linear 0.35s;
-webkit-transition: transform 0.2s linear 0s, opacity 0.2s linear 0.35s;
-o-transition: transform 0.2s linear 0s, opacity 0.2s linear 0.35s;
-ms-transition: transform 0.2s linear 0s, opacity 0.2s linear 0.35s;
transition: transform 0.2s linear 0s, opacity 0.2s linear 0.35s;
}
.box:hover .box-layer{
-moz-transform: scale(5);
-ms-transform: scale(5);
-o-transform: scale(5);
-webkit-transform: scale(5);
transform: scale(5);
opacity: 0;
-webkit-transition-delay: 0.55s;
-moz-transition-delay: 0.55s;
-o-transition-delay: 0.55s;
-ms-transition-delay: 0.55s;
transition-delay: 0.55s;
}
.box .box-circle{
width: 82px;
height: 82px;
margin: auto;
position: relative;
top: 19px;
-moz-transition: transform 0.4s linear 0s;
-ms-transition: transform 0.4s linear 0s;
-webkit-transition: transform 0.4s linear 0s;
-o-transition: transform 0.4s linear 0s;
transition: transform 0.4s linear 0s;
}
.box:hover .box-circle{
-moz-transform: rotate(360deg);
-ms-transform: rotate(360deg);
-o-transform: rotate(360deg);
-webkit-transform: rotate(360deg);
transform: rotate(360deg);
}
.box .layer{
width: 80px;
height: 80px;
border-radius: 50%;
background: transparent;
position: absolute;
top: 0;
left: 0;
}
.box:hover .layer{
-webkit-border-radius: 0px;
border-radius: 0px;
}
.box .left-layer{
border-left: 2px solid #fff;
-o-transition: all 0.15s linear 0.3s;
-ms-transition: all 0.15s linear 0.3s;
-moz-transition: all 0.15s linear 0.3s;
-webkit-transition: all 0.15s linear 0.3s;
transition: all 0.15s linear 0.3s;
}
.box .top-layer{
width: 80px;
border-top: 2px solid #fff;
-moz-transition: all 0.15s linear 0.2s;
-o-transition: all 0.15s linear 0.2s;
-ms-transition: all 0.15s linear 0.2s;
-webkit-transition: all 0.15s linear 0.2s;
transition: all 0.15s linear 0.2s;
}
.box .right-layer{
border-right: 2px solid #fff;
-moz-transition: all 0.15s linear 0.1s;
-o-transition: all 0.15s linear 0.1s;
-ms-transition: all 0.15s linear 0.1s;
-webkit-transition: all 0.15s linear 0.1s;
transition: all 0.15s linear 0.1s;
}
.box .bottom-layer{
width: 80px;
border-bottom: 2px solid #fff;
-moz-transition: all 0.15s linear 0s;
-ms-transition: all 0.15s linear 0s;
-webkit-transition: all 0.15s linear 0s;
-o-transition: all 0.15s linear 0s;
transition: all 0.15s linear 0s;
}
.box .icon i{
position: absolute;
left: -2px;
right: 0;
font-size: 25px;
color: #fff;
line-height: 82px;
}
.box .box-content{
width: 100%;
height: 100%;
position: absolute;
top: 0;
left: 0;
color: #fff;
opacity: 0;
-moz-transition: all 0.2s linear 0s;
-ms-transition: all 0.2s linear 0s;
-o-transition: all 0.2s linear 0s;
-webkit-transition: all 0.2s linear 0s;
transition: all 0.2s linear 0s;
}
.box:hover .box-content{
opacity: 1;
-moz-transition-delay: 0.85s;
-ms-transition-delay: 0.85s;
-o-transition-delay: 0.85s;
-webkit-transition-delay: 0.85s;
transition-delay: 0.85s;
}
.box .title{
width: 80%;
margin: 20% auto 0;
background: rgba(44, 150, 117, 0.8);
font-size: 22px;
font-weight: 400;
text-transform: uppercase;
padding: 6px 0;
position: relative;
}
.box .title:before{
content: "";
display: block;
border: 20px solid transparent;
border-top: 20px solid rgba(44, 150, 117, 0.8);
position: absolute;
top: 100%;
left: 42%;
}
.box .description{
width: 80%;
font-size: 14px;
font-weight: 400;
padding: 6px 10px;
background: rgba(44, 150, 117, 0.8);
margin: 40px auto 0;
}
.box .btn{
display: inline-block;
padding: 7px 20px;
margin: 30px auto 0;
border-radius: 5px;
background: #80541b;
font-size: 15px;
color: #fff;
text-transform: capitalize;
box-shadow: inset 0 0 7px 1px rgba(0,0,0,0.2);
}
@media only screen and (max-width:990px){
.box{ margin-bottom: 30px; }
}
@media only screen and (max-width:360px){
.box .title{ margin: 10% auto 0; }
}

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