header.jumbotron {
      background: url("../images/img001.jpg");
      background-position: center center;
      background-size: cover;
      color: #000;
    }
    
    header .midashi-btn {
      border: 1px solid #fff;
      color: #fff;
      border-radius: 0;
    }
    
    header .midashi-btn:hover {
      color: #0089ff;
      border-color: #0089ff;
    }

row-2nd {
    position: relative;
    background: url("../images/test.jpg") no-repeat;
    -webkit-background-size: cover;
    background-size: cover;
    padding: 50px 0;
}