nav .navbar .links li:nth-child(1) .line {
  padding-bottom: 30px;
  transition: ease-in-out 0.5s;
}

nav .navbar .links li:hover .line {
  padding-bottom: 0;
}

nav .navbar .links li:nth-child(5) .line2 {
  padding-bottom: 0;
}

nav .navbar .links li:first-child a {
  color: #000000b0;
}

nav .navbar .links li:nth-child(5) a {
  color: #b3a45a;
}


.header-banner {
  max-width: 1800px;
  margin: auto;
  height: 410px;
  background: linear-gradient(rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.723)), url(../images/Our\ Projects.avif);
  background-position: center;
  background-size: 100% 200%;
  text-align: center;
  padding-top: 300px;
  color: rgb(255, 255, 255);
  font-size: 40px;
  margin-top: -120px;
  margin-bottom: 30px;
}

.sec13b{
  padding-bottom: 50px;
}


.our2dProject {
  max-width: 1800px;
  margin: auto;
  padding: 3%;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}

.our2dProject img {
  width: 49%;
  margin-top: 20px;
}

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

  .header-banner {
    background-size: 100% 100%;
    height: 300px;
    padding-top: 200px;
    margin-top: -0px;

  }

  nav .navbar .links li .line {
    display: none;
  }

  .sec13 .swiper-slide {
    width: 100%;
    margin: 10px 0;
  }

  nav .navbar .links li:first-child a {
    color: #ffffffed;
  }

  .our2dProject img {
    width: 100%;
  }

}