@import url(http://fonts.lug.ustc.edu.cn/css?family=Roboto+Condensed:300);
h1{
  font-family: 'Roboto Condensed', sans-serif;
  text-align: center;
}
.cf:before,
.cf:after {
    content: " "; /* 1 */
    display: table; /* 2 */
}

.cf:after {
    clear: both;
}

/**
 * For IE 6/7 only
 * Include this rule to trigger hasLayout and contain floats.
 */
.cf {
    *zoom: 1;
}

.boxes{
    display: block;
    width: 30%;
    height: 220px;
    background: #fe4;
    position: relative;
    overflow: hidden;
    float: left;
    margin: 1.5%;
    cursor: pointer;
}
.da-image{
   min-height: 100%;
   width: 100%;
}
.overlay{
    display: block;
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0%;
    left: -100%;
    color: #FFF;
    background-color: rgba(0,0,0,0.8);
    z-index: 10;
}

.container{
    width: 1170px;
    display: block;
    margin: auto;
}