.pd-t-b {
  padding-top: 40px;
  padding-bottom: 60px;
}
.pd-t-b h3 {
    font-size: 36px;
    color: var(--color-primary);
    line-height: 1;
    font-family: var(--font-family1);
    text-align: center;
    text-transform: capitalize;
}
.pd-t-b h3::after {
  content: "";
  background: var(--color-primary);
  width: 40px;
  height: 4px;
  margin: 11px auto 0;
  display: block;
}
.ytht-mb-30 {
  margin-bottom: 30px;
}

.cert-list {
  text-align: center;
}

.cert-list ul {
  margin: 0 0 0 -2%;
}

/* .cert-list ul li {
  float: left;
  width: 23%;
  margin: 0 0 20px 2%;
  text-align: center;
} */

.cert-list ul li a {
  display: block;
  width: 100%;
  overflow: hidden;
}

.cert-list ul li img {
  width: 100%;
  border: 3px solid #e0e0e0;
  box-sizing: border-box;
  display: block;
}

.cert-list ul li p {
  font-size: 16px;
  margin: 10px 0 0 0;
  color: #252525;
}

@media screen and (max-width: 768px) {
  .main {
    padding-top: 25px;
    padding-bottom: 30px;
  }

  /* .cert-list ul li {
    width: 48%;
    margin: 0 0 15px 2%;
  } */
}


@media screen and (max-width: 1281px) {
  .pd-t-b h3 {font-size: 34px;}
}
@media screen and (max-width: 1171px) {
  .pd-t-b h3 {font-size: 30px;}
}
@media screen and (max-width: 992px) {
  .pd-t-b h3 {font-size: 26px;}
  .pd-t-b {padding-top: 30px;padding-bottom: 30px;}
}
@media screen and (max-width: 768px) {
  .pd-t-b h3 {font-size: 24px;}
}
@media screen and (max-width: 480px) {
  .pd-t-b h3 {font-size: 22px;}
}