.certificate-banner {
  width: 100%;
  height: 550px;
  background: url(../img/abouts_banner.png) center no-repeat;
  background-size: cover;
}
.certificate-banner-text {
  font-size: 54px;
  color: #ffffff;
  line-height: 54px;
  text-align: center;
  position: relative;
  top: 200px;
  letter-spacing: 5px;
  font-weight: 600;
}

.certificate-content {
  width: 100%;
  min-height: 700px;
  background: #f5f5f5;
  padding-bottom: 80px;
}
.certificate-body {
  width: 1200px;
  margin: 0 auto;
  padding-top: 60px;
}
.certificate-title {
  text-align: center;
  position: relative;
  height: 62px;
}
.certificate-title-show {
  font-size: 32px;
  font-weight: 600;
  color: #7c8398;
  opacity: 0.3;
  line-height: 45px;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -9px);
  z-index: 0;
}
.certificate-title-text {
  font-size: 28px;
  font-weight: 600;
  color: #000000;
  line-height: 40px;
  position: relative;
  z-index: 1;
}
.certificate-title-text span {
  display: block;
  width: 64px;
  height: 4px;
  background: #2f6bfc;
  margin: 10px auto 0;
}
.certificate-desc {
  text-align: center;
  font-size: 16px;
  color: #595959;
  margin-top: 20px;
}
.certificate-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
  margin-top: 50px;
  justify-content: center;
}
.certificate-item {
  width: 270px;
    padding-top: 8px;
  background: #ffffff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}
.certificate-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}
.certificate-item img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  display: block;
}
.certificate-item p {
  text-align: center;
  font-size: 14px;
  font-weight: 500;
  color: #333333;
  padding: 16px 10px;
}

.nav-wrap {
  background: linear-gradient(180deg, #fdfdfd 0%, #f5f5f5 100%);
  box-shadow: 0px 10px 15px 0px rgba(0, 42, 135, 0.15);
  display: flex;
  flex-direction: row;
  justify-content: center;
  position: relative;
  z-index: 1;
}
.nav-wrap .nav-item {
  margin: 0 40px;
  cursor: pointer;
  font-size: 18px;
  font-family: PingFangSC-Semibold, PingFang SC;
  font-weight: 600;
  color: #596680;
  height: 70px;
  line-height: 70px;
  text-align: center;
  position: relative;
}
.nav-wrap .nav-item.active {
  color: #0953f7;
}
.nav-wrap .nav-item.active::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 70px;
  height: 4px;
  background: #0953f7;
}