main {
    margin: 50px auto;
    width: 1200px;
}

.us-box {
    position: relative;
    height: 300px;
    margin: 40px 0;
    background-size: auto 300%;
    background-attachment: local;
    background-position: center;
    border-top-left-radius: 50px;
    border-bottom-right-radius: 50px;
    overflow: hidden;
}

.top {
    background-image: url(../img/hospital-1802679.jpg);
}

.middle {
    background-image: url(../img/20424236_10213131343100088_6427982550068883881_o.jpg);
}

.bottom {
    background-image: url(../img/20120926112.jpg);
}

.us-text {
    position: absolute;
    bottom: 20px;
    padding: 20px 40px;
    text-align: center;
    font-weight: bold;
    color: black;
}

.us-text span {
    text-decoration: underline;
}

.us-text h2{
    margin-bottom: 10px;
    text-transform: uppercase;
}

.us-bg {
    position: absolute;
    bottom: 0;
    height: 45%;
    width: 100%;
    background-color: rgba(176, 201, 238, 0.6);
}