/* 关于金鼎banner样式 */
.about-banner-box {
  width: 100%;
  margin: 0;
  padding: 0;
}
.about-banner-img {
  position: relative;
  width: 100%;
  height: 725px;
  min-height: 725px;
  max-height: 725px;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.about-banner-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.about-banner-mask {
  position: absolute;
  left: 0; top: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.35);
  z-index: 1;
}
.about-banner-text {
  position: absolute;
  left: 12vw;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  color: #fff;
  text-align: left;
  opacity: 0;
  animation: aboutBannerFadeIn 1.2s ease 0.1s forwards;
}
.about-banner-title-cn {
  font-size: 64px;
  font-weight: bold;
  letter-spacing: 2px;
  margin-bottom: 18px;
}
.about-banner-title-en {
  font-size: 28px;
  letter-spacing: 2px;
  text-transform:uppercase;
}
@keyframes aboutBannerFadeIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(-50%); }
}

/* 子栏目导航 */
.about-subnav {
  display: flex;
  justify-content: center;
  align-items: stretch;
  background: #fff;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}
.about-subnav-item {
  flex: 1 1 0;
  text-align: center;
  font-size: 20px;
  color: #999;
  padding: 28px 0 18px 0;
  background: #fff;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.about-subnav-item.cur,
.about-subnav-item:hover {
  background: #AD191E;
  color: #fff;
}

/* 手机端自适应 */
@media (max-width: 900px) {
  .about-banner-img {
    height: 48vw;
    min-height: 180px;
    max-height: 260px;
  }
  .about-banner-text {
    left: 6vw;
  }
  .about-banner-title-cn {
    font-size: 36px;
    margin-bottom: 10px;
  }
  .about-banner-title-en {
    font-size: 16px;
  }
  .about-subnav-item {
    font-size: 16px;
    padding: 16px 0 10px 0;
  }
  .about-subnav {
    max-width: 100%;
  }
}
@media (max-width: 600px) {
  .about-banner-img {
    height: 32vh;
    max-height: 420px;
  }

  .about-banner-box{
    padding-top: 75px;
  }
  .about-banner-text {
    left: 0;
    width: 100%;
    text-align: center;
    top: 50%;
    transform: translateY(-50%);
  }
  .about-banner-title-cn {
    font-size: 22px;
    margin-bottom: 6px;
  }
  .about-banner-title-en {
    font-size: 12px;
  }
  .about-subnav {
    display: block;
    flex-wrap: unset;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    max-width: 100%;
    white-space: nowrap;
    padding-bottom: 2px;
  }
  .about-subnav-item {
    display: inline-block;
    min-width: 90px;
    width: auto;
    font-size: 13px;
    padding: 14px 18px 10px 18px;
    box-sizing: border-box;
    white-space: nowrap;
    flex: none;
  }
}

@media (max-width: 600px) {
    .about-banner-box {
        padding-top: 60px;
    }
}

@media (max-width: 500px) {
    .about-banner-box {
        padding-top: 70px;
    }
}


/* 企业实景板块整体 */
.about-scene-section {
  width: 100vw;
  margin-left: 50%;
  transform: translateX(-50%);
  background: #fff;
  padding: 90px 0 90px 0;
}
.about-scene-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 15px;
  box-sizing: border-box;
}
.about-scene-title {
  font-size: 36px;
  font-weight: bold;
  color: #222;
  text-align: center;
  margin-bottom: 48px;
  letter-spacing: 2px;
}
.about-scene-swiper {
  position: relative;
  width: 100%;
  margin: 0 auto;
  overflow: hidden;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 0px;
}
.about-scene-swiper-wrapper {
  display: flex;
  transition: transform 0.5s cubic-bezier(.4,0,.2,1);
  will-change: transform;
  width: 100%;
}
.about-scene-swiper-slide {
  flex: 0 0 50%;
  max-width: 50%;
  padding: 0 12px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-scene-swiper-slide img {
  width: 100%;
  border-radius: 8px;
  background: #f7f7f7;
  object-fit: cover;
}
@media (max-width: 500px) {
  .about-scene-swiper-slide { flex: 0 0 66.6666%; max-width: 66.6666%; }
}

/* 企业实景箭头样式，和证书板块一致 */
.about-scene-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #fff;
  border: none;
  outline: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(0,0,0,0.25);
  transition: background .2s;
  padding: 0;
}
.about-scene-arrow-left { left: 30px; }
.about-scene-arrow-right { right: 20px; }
.about-scene-arrow:after {
  content: '';
  display: block;
  width: 12px;
  height: 12px;
  border: solid #222;
  border-width: 0 2.5px 2.5px 0;
  padding: 0;
  transition: border-color .2s;
}
.about-scene-arrow-left:after {
  transform: rotate(135deg);
  margin-left: 1px;
}
.about-scene-arrow-right:after {
  transform: rotate(-45deg);
  margin-right: 1px;
}
.about-scene-arrow:hover {
  background: #BF4F53;
}
.about-scene-arrow:hover:after {
  border-color: #fff;
}
@media (max-width: 700px) {
  .about-scene-arrow { width: 28px; height: 28px; }
  .about-scene-arrow-left { left: 0; }
  .about-scene-arrow-right { right: 0; }
  .about-scene-arrow:after { width: 9px; height: 9px; border-width: 0 2px 2px 0; }
}

@media (max-width: 500px) {
  .about-scene-section {
    width: 100vw;
    margin-left:0;
    transform: none;
    padding: 56px 0 60px 0;
  }
  .about-scene-title{
    font-size: 26px; margin-bottom: 25px;
  }
}