Edit in JSFiddle

<div class="thumbs">
    <img src="http://dbmast.ru/files/responsive-images-demo/images/image02.jpg"/>
    <div class="caption">
        <span class="title">Заголовок картинки</span>
        <span class="info">Краткое описание или анонс записи</span>
    </div>
</div>

*,
::after,
::before {
    box-sizing: border-box;
}
html,
body {
    margin: 0;
    height: 100%;
    padding: 0;
    border: 0;
}
body {
    font: 100% Tahoma, Geneva, sans-serif;
    background-color: #666;
    background-image: linear-gradient(-123deg, #2d363d 0%, #677274 20%, #7a8485 28%, #9d9c98 61%, #c3b5a8 100%);
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    -ms-flex-pack: center;
    justify-content: center;
}

.thumbs {
  width: 100%;
  max-width: 450px; /* опционально */
  margin: 10px;
  opacity: .99;
  overflow: hidden;
  position: relative;
  border-radius: 3px;
  cursor: pointer;
  -webkit-box-shadow: 0 12px 15px 0 rgba(0, 0, 0, 0.24), 0 17px 50px 0 rgba(0, 0, 0, 0.19);
  -moz-box-shadow: 0 12px 15px 0 rgba(0, 0, 0, 0.24), 0 17px 50px 0 rgba(0, 0, 0, 0.19);
  box-shadow: 0 12px 15px 0 rgba(0, 0, 0, 0.24), 0 17px 50px 0 rgba(0, 0, 0, 0.19);
}
.thumbs:before {
  content: '';
  background: -webkit-linear-gradient(top, transparent 0%, rgba(0, 0, 0, 0.7) 100%);
  background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.7) 100%);
  width: 100%;
  height: 50%;
  opacity: 0;
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 2;
  -webkit-transition-property: top, opacity;
  transition-property: top, opacity;
  -webkit-transition-duration: 0.3s;
  transition-duration: 0.3s;
}
.thumbs img {
  display: block;
  width: 100%; /* ширина картинки */
  height: auto; /* высота картинки */
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}
.thumbs .caption {
  width: 100%;
  padding: 20px;
  color: #fff;
  position: absolute;
  bottom: 0;
  left: 0;
  z-index: 3;
  text-align: center;
}
.thumbs .caption span {
  display: block;
  opacity: 0;
  position: relative;
  top: 100px;
  -webkit-transition-property: top, opacity;
  transition-property: top, opacity;
  -webkit-transition-duration: 0.3s;
  transition-duration: 0.3s;
  -webkit-transition-delay: 0s;
  transition-delay: 0s;
}
.thumbs .caption .title {
  line-height: 1;
  font-weight: normal;
  font-size: 18px;
}
.thumbs .caption .info {
  line-height: 1.2;
  margin-top: 5px;
  font-size: 12px;
}
.thumbs:focus:before,
.thumbs:focus span, .thumbs:hover:before,
.thumbs:hover span {
  opacity: 1;
}
.thumbs:focus:before, .thumbs:hover:before {
  top: 50%;
}
.thumbs:focus span, .thumbs:hover span {
  top: 0;
}
.thumbs:focus .title, .thumbs:hover .title {
  -webkit-transition-delay: 0.15s;
          transition-delay: 0.15s;
}
.thumbs:focus .info, .thumbs:hover .info {
  -webkit-transition-delay: 0.25s;
          transition-delay: 0.25s;
}