.text-title {
  font-size: 30px;
  font-weight: 500;
  margin-bottom: 2rem;
  position: relative;
}
.aboutus .text {
  font-size: 18px;
}
.aboutus .text span {
  font-size: 22px;
  font-weight: 500;
}
.aboutus .img {
  height: 100%;
  display: flex;
  align-items: center;
}
.aboutus-1 {
  background-image: url(../images/about-BG.png);
  background-size: cover;
  background-position: bottom;
  padding: 10rem 0 4rem 0;
}
.aboutus-2 {
  padding: 4rem 0;
}

.aboutus li {
  list-style-type: square;
  color: #003aab;
}
.aboutus li span {
  color: black;
}

.BG-aboutus {
  background-image: url(../images/about-BG3.png);
  background-repeat: no-repeat;
  background-position: left 71%;
}
.aboutus-structure {
  /*  background-image: url(../images/about-BG2.png); */
  background-size: cover;
  background-position: bottom;
  padding: 4rem 0;
}
.aboutus-structure .icon {
  text-align: center;
  margin-bottom: 1rem;
}
.aboutus-structure .icon img {
  width: 100px;
}
.aboutus-structure .img1,
.aboutus-structure .img2 {
  text-align: center;
}
.aboutus-structure .img1 img {
  width: 90%;
}
.aboutus-structure .img2 img {
  width: 720px;
}

.aboutus-certificate {
  padding-bottom: 4rem;
}
.aboutus-certificate .img {
  text-align: center;
}
.aboutus-certificate .img img {
  width: 620px;
}

@media (max-width: 991px) {
  .text-title {
    font-size: 24px;
    margin-bottom: 1rem;
  }
  .aboutus-1 {
    padding: 6rem 0 0 0;
  }
  .aboutus-structure .img1 img,
  .aboutus-certificate .img img {
    width: 100%;
  }
  .aboutus-structure .img2 img {
    width: 80%;
  }
  .aboutus .text-title {
    font-size: 22px;
    text-align: center;
  }
  .aboutus .text {
    font-size: 14px;
  }
  .aboutus .text span {
    font-size: 16px;
  }
  .aboutus-structure {
    padding: 0 0 2rem 0;
  }
  .aboutus-structure .icon img {
    width: 60px;
  }
  .aboutus-certificate {
    padding: 0;
  }
}