Reply To: responsive image with text and button

You added a min-height to your .slider .wrap so a lot of that space is coming from that.

Next there is margin or the widget area on line 1242 –

.slider .widget {
    margin: 0 0 20px;
}

The rest of it is coming from line 4346 –

.feature-right {
    float: none;
    margin: 40px auto 0;
    text-align: center;
    width: 100%;
}