.sec1{
    max-width: 1800px;
    margin: auto;
    height: 500px;
    background:linear-gradient(to right,rgba(0, 0, 0, 0.123),rgba(0, 0, 0, 0.103)), url(../images/our\ clients\ banner.jpg);
    background-position: center;
    background-size: 100% 155%;
    text-align: center;
    padding-top: 350px;
    color: white;
    font-size: 40px;
    /* margin-top: -120px; */
}

.sec1 h1{
  font-size: 55px;
  color: rgb(255, 255, 255);
  font-weight: 400;
}

.sec11-clients{
  max-width: 1800px;
  margin: auto;
  display: flex;
  flex-wrap: wrap;
  margin-top: 30px;
  padding: 20px;
}


.sec11-clients .sec11-boxes{
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-evenly;
}
.sec11-clients img {
  width: 150px;
  height: 80px;
  margin: 20px;
  background-color: rgb(255, 255, 255);
}


@media screen and (max-width: 900px) {

.sec1{
  background-size: 140% 100%;
  height: 450px;
  margin-top: -120px;
}
.sec1 h1{
  font-size: 35px;
}
.bt{
  padding: 15px 0px;
}

.bt .btn-container button{
  margin: 0 10px;
}
  .sec11{
    padding: 10px;
  }

  .sec11-box{
    width: 150px;
    padding: 0;
    margin-top: 10px;
  }
  .sec11-box img{
  }
}