.introduce{
    overflow:hidden;
    background-repeat:no-repeat;
    background-position:top center;
    background-size: cover;
    background-color:;
}

.skills{
    overflow:hidden;
    position: relative;
    background-color:;
}
.skills:after {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    opacity: 0.9;
    background-color:rgb(40,122,44);
  }
.skills .container{
  position: relative;
  z-index: 1;
}

.services{
    overflow:hidden;
    background-color:rgba(213,213,213,0.32); 
}

.product{
    overflow:hidden;
    background-repeat:no-repeat;
    background-position:top center;
    background-size: cover;
    background-color:rgba(0,0,0,0.03); 
}

.case{
    overflow:hidden;
    background-color:rgb(245,245,245); 
}

.testimonial{
    overflow:hidden;
    background-color:rgba(213,213,213,0.18); 
}

.news{
    background-repeat:no-repeat;
    background-position:top center;
    background-size: cover;
    overflow:hidden;
    background-color:rgba(255,190,106,0.03);
}

.client{
    overflow:hidden;
    background-color:rgb(250,254,255);
}