.main-topic {
    border: 2px solid green;
    width: 1541px;
    margin: 0 auto;
    clear: both;
}

.left-text {
    vertical-align: middle;
    float: left;
}

.right-picture {

}

.right-picture > img {
    display: block;
}

.clear {
    clear: both;
}

.card-horizontal {
  display: flex;
  flex: 1 1 auto;
}