img {
    max-width: 100%;
    height: auto; 
}



/* service demo -1  */
.box4 {
  position: relative;
}
.box4:before {
  width: 0;
  height: 200%;
  background: rgba(0, 0, 0, 0.5);
  position: absolute;
  top: 0;
  left: -250px;
  bottom: 0;
  transform: skewX(-36deg);
  transition: all 0.5s ease 0s;
}
.box4:hover:before {
  width: 200%;
}
.box4 img {
  width: 100%;
  height: 300px; 
  object-fit: cover;
}
.box4 .box-content {
  width: 100%;
  height: 100%;
  padding-top: 20%;
  position: absolute;
  top: 0;
  left: 0;
  transform: scale(0);
  transition: all 0.3s ease 0s;
  background: #169fed8f;
  text-decoration: none;
}
.box4 .icon,
.box5 .icon {
  list-style: none;
  padding: 0;
}
.box4:hover .box-content {
  transform: scale(1);
}
.box4 .title {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin: 0 0 10px;
}
.box4 .post {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}
.box4 .icon {
  margin: 0;
}
.box4 .icon li {
  display: inline-block;
}
.box4 .icon li a {
  display: block;
  width: 35px;
  height: 35px;
  line-height: 35px;
  font-size: 20px;
  background: #fff;
  color: #ee4266;
  margin-right: 10px;
  transition: all 0.3s ease 0s;
}
.box5 .icon,
.box5 .icon li {
  display: inline-block;
}
@media only screen and (max-width: 990px) {
  .box4 {
    margin-bottom: 30px;
  }
}
@media only screen and (max-width: 767px) {
  .box4:before {
    left: -400px;
  }
  .box4:hover:before {
    width: 300%;
  }
}