.bg4{
    background: url(../images/photo/image11.png);
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    width: 100%;
    height: 100%;
    position: relative;
    box-sizing: border-box;
    z-index: -2;
    }
  .gradColor2{
    background-image: linear-gradient(180deg, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.7));    
    position: absolute;
    top: 0;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
    z-index: -1;
    }