/* 企业简介板块 */
.about-intro-section {
  background: #F4F4F4;
  padding: 80px 0 60px 0;
}
.about-intro-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
}
.about-intro-left {
  flex: 1.1;
  min-width: 320px;
  padding-left: 4vw;
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(.4,0,.2,1);
}
.about-intro-right {
  flex: 1;
  min-width: 320px;
  display: flex;
  justify-content: flex-end;
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(.4,0,.2,1);
}
.about-intro-img {
  width: 100%;
  max-width: 600px;
  border-radius:0px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}
.about-intro-title {
  font-size: 30px;
  font-weight: bold;
  margin-bottom: 20px;
  color: #222;
}
.about-intro-desc {
  font-size: 14px;
  color: #666;
  line-height: 1.7;
  margin-bottom: 48px;
}
.about-intro-desc p{
  margin-bottom:10px ;
}

.about-intro-stats {
  display: flex;
  flex-direction: column;
  gap: 32px;
  margin-top: 10px;
  align-items: flex-start;
}
.about-intro-stat {
  display: flex;
  align-items: flex-start;
  gap: 18px;
}
.about-intro-stat-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-intro-stat-icon img {
  width: 48px;
  height: 48px;
  display: block;
}
.about-intro-stat-num-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.about-intro-stat-num-row {
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.about-intro-stat-num {
  font-size: 42px;
  color: #AD191E;
  font-weight: bold;
  letter-spacing: 2px;
  line-height: 1.1;
  display: inline-block;
}
.about-intro-stat-label {
  font-size: 16px;
  color: #888;
  margin-top: 8px;
  text-align: left;
}
.about-intro-stat-unit {
  font-size: 20px;
  color: #999;
  margin-left: 2px;
  margin-bottom: 2px;
  display: inline-block;
}
/* 渐入动画class */
.about-intro-animate {
  opacity: 1 !important;
  transform: translateY(0) !important;
}
@media (max-width: 900px) {
  .about-intro-container {
    flex-direction: column;
    gap: 32px;
    padding: 0 4vw;
  }
  .about-intro-left, .about-intro-right {
    padding-left: 0;
    min-width: 0;
    width: 100%;
    justify-content: center;
    text-align: center;
  }
  .about-intro-img {
    max-width: 100%;
  }
  .about-intro-stats {
    align-items: center;
    gap: 24px;
  }
  .about-intro-stat {
    justify-content: center;
    gap: 12px;
  }
  .about-intro-stat-icon, .about-intro-stat-icon img {
    width: 36px;
    height: 36px;
  }
  .about-intro-stat-num {
    font-size: 28px;
  }
  .about-intro-stat-unit {
    font-size: 14px;
  }
  .about-intro-stat-label {
    font-size: 13px;
    text-align: left;
  }
  .about-intro-stat-num-row {
    align-items: flex-end;
  }
}
@media (max-width: 600px) {
  .about-intro-section {
    padding: 36px 0 24px 0;
  }
  .about-intro-title {
    font-size: 24px;
    margin-bottom: 16px;
  }
  .about-intro-desc {
    font-size: 15px;
    margin-bottom: 24px;
  }
  .about-intro-stat-num {
    font-size: 28px;
    min-width: 60px;
  }
  .about-intro-stat-label {
    font-size: 13px;
  }
}

/* 发展历程板块整体 */
.about-history-section {
  position: relative;
  padding: 90px 0 80px 0;
  background: none;
  overflow: hidden;
  background:url(../images/about_history_bg.jpg) no-repeat center center;
}
.about-history-bg {
  position: absolute;
  left: 0; top: 0; right: 0; bottom: 0;
  background: url('../images/about_history_bg.jpg') center center/cover no-repeat;
  z-index: 0;
  opacity: 0.18;
  pointer-events: none;
}
.about-history-container {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
}
.about-history-title {
  text-align: center;
  font-size: 36px;
  font-weight: bold;
  color: #333333;
  margin-bottom: 50px;
  letter-spacing: 4px;
}
.about-history-swiper-wrap {
  position: relative;
  padding-bottom: 50px;
}
.about-history-swiper {
  width: 100%;
  padding-bottom: 30px;
}
.about-history-swiper .swiper-slide {
  width: auto;
}
.about-history-item {
  background: transparent;
  border-right: 1px solid #CCCCCC;
  padding: 20px 35px;
  min-width: 300px;
  box-sizing: border-box;
  text-align: left;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  height:auto;
  justify-content: center;
  padding-bottom: 40px;
  cursor: pointer;
}
.swiper-slide:last-child .about-history-item {
  border-right: none;
}
.about-history-year {
  font-size: 54px;
  font-weight: bold;
  color: #AD191E;
  margin-bottom: 18px;
  margin-top: 10px;
}
.about-history-label {
  font-size: 26px;
  font-weight: bold;
  color: #333333;
  margin-bottom: 12px;
}
.about-history-desc {
  font-size: 15px;
  color: #666666;
  line-height: 1.8;
  margin-bottom: 10px;
  padding-right: 20px;
}

/* 时间轴 */
.about-history-timeline {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 5px;
  width: 100%;
  z-index: 2;
}
.about-history-timeline-bar {
  position: absolute;
  left: 0; top: 0; height: 5px; width: 100%;
  background: #666666;
  border-radius: 2.5px;
}
.about-history-timeline-progress {
  position: absolute;
  left: 0; top: 0; height: 5px;
  background: #AD191E;
  border-radius: 2.5px;
  width: 0;
  transition: width 0.3s;
}

/* swiper自适应 */
@media (max-width: 900px) {
  .about-history-item {
    min-width: 220px;
    padding: 0 30px;
    height: 180px;
  }
  .about-history-year {
    font-size: 32px;
  }
  .about-history-label {
    font-size: 16px;
  }
  .about-history-desc {
    font-size: 13px;
  }
  .about-history-title {
    font-size: 22px;
    margin-bottom: 24px;
  }
  .about-history-swiper-wrap {
    padding-bottom: 36px;
  }
}

@media (max-width: 500px) {
  .about-history-item {
    text-align: center;
    align-items:center;
  }
  .about-history-section{
    padding-bottom: 60px; padding-top: 60px;
  }
}
/* 发展历程动画初始状态 */
.about-history-section .about-history-title,
.about-history-section .about-history-swiper-wrap {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(.4,0,.2,1);
}

/* 激活时渐入 */
.about-history-section.in-viewport .about-history-title,
.about-history-section.in-viewport .about-history-swiper-wrap {
  opacity: 1;
  transform: translateY(0);
}

.about-culture-section {
  padding: 60px 0 40px 0;
  background: none;
}
.about-culture-list {
  display: flex;
  flex-direction: column;
  gap: 36px;
}
.about-culture-item {
  position: relative;
  width: 100vw;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
  height: 380px;
  background-size: cover;
  background-position: center;
  border-radius: 0; /* 无圆角 */
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-culture-mask {
  position: absolute;
  left: 0; top: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.45);
  z-index: 1;
}
.about-culture-texts {
  position: relative;
  z-index: 2;
  width: 100%;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.about-culture-slogan {
  color: #fff;
  font-size: 28px;
  font-weight: 400;
  margin-bottom: 12px;
  letter-spacing: 2px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.25);
}
.about-culture-title {
  color: #fff;
  font-size: 18px;
  font-weight: bold;
  letter-spacing: 2px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.25);
  line-height: 1.3;
  padding: 0 20px;
}

/* 移动端适配 */
@media (max-width: 900px) {
  .about-culture-item {
    height: 200px;
  }
  .about-culture-title {
    font-size: 1.1rem;
    padding: 0 8px;
  }
  .about-culture-slogan {
    font-size: 0.9rem;
    margin-bottom: 6px;
  }
  .about-culture-list {
    gap: 18px;
  }
}

/* 轮播容器 */
.about-swiper-section {
  width: 100vw;
  margin-left: 50%;
  transform: translateX(-50%);
  position: relative;
  overflow: hidden;
  background: #000;
  margin-top:75px;
}
.about-swiper-container {
  width: 100vw;
  max-width: 100vw;
  position: relative;
  height: 770px;
}
.about-swiper {
  position: relative;
  width: 100vw;
  height: 100%;
  max-height: 770px;
  min-height: 220px;
}
.about-swiper-wrapper {
  display: flex;
  transition: transform 0.6s cubic-bezier(.4,0,.2,1);
  height: 100%;
}
.about-swiper-slide {
  min-width: 100vw;
  height: 100%;
  background-size: cover;
  background-position: center;
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.about-swiper-mask {
  position: absolute;
  left: 0; top: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.26);
  z-index: 1;
}
.about-swiper-caption {
  position: absolute;
  left: 50%;
  bottom: 10%;
  transform: translateX(-50%);
  color: #fff;
  background: none;
  padding: 0;
  border-radius: 0;
  font-size: 2.1vw;
  font-weight: bold;
  z-index: 2;
  text-align: center;
  letter-spacing: 2px;
  box-shadow: none;
}




@media (max-width: 900px) {
  .about-swiper-container,
  .about-swiper {
    height: 56vw;
    max-height: none;
    min-height: 180px;
  }
  .about-swiper-caption { font-size: 3.5vw; }
}
@media (max-width: 600px) {
  .about-swiper-container,
  .about-swiper {
    height:75vw;
    min-height: 140px;
  }
  .about-swiper-caption { font-size: 4.5vw; }
}

/* 轮播箭头样式 */
.about-swiper-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: transparent;
  border: 2px solid #fff;
  outline: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color .2s;
  box-shadow: none;
  padding: 0;
}
.about-swiper-arrow-left { left: 32px; }
.about-swiper-arrow-right { right: 32px; }
.about-swiper-arrow:after {
  content: '';
  display: block;
  width: 10px;
  height: 10px;
  border: solid #fff;
  border-width: 0 3px 3px 0;
  padding: 0;
}
.about-swiper-arrow-left:after {
  transform: rotate(135deg);
  margin-left: 2px;
}
.about-swiper-arrow-right:after {
  transform: rotate(-45deg);
  margin-right: 2px;
}
.about-swiper-arrow:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.08);
}
@media (min-width: 1460px) {
  .about-swiper-arrow-left{
    left:calc((100vw - 1400px)/2 + 20px);
  }
  .about-swiper-arrow-right{
    right:calc((100vw - 1400px)/2 + 20px);
  }
}

@media (max-width: 600px) {
  .about-swiper-arrow {
    width: 28px; height: 28px;
  }
  .about-swiper-arrow-left { left: 8px; }
  .about-swiper-arrow-right { right: 8px; }
  .about-swiper-arrow:after {
    width: 10px; height: 10px; border-width: 0 2px 2px 0;
  }
}

/* 证书切换板块整体布局 */
.about-cert-section {
  width: 100vw;
  margin-left: 50%;
  transform: translateX(-50%);
  background: #f4f4f4;
  padding: 86px 0 80px 0;
}

.about-cert-tabs {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
  margin-bottom: 32px;
}
.about-cert-tab {
  font-size: 16px;
  color: #999;
  cursor: pointer;
  padding: 0 10px 10px 10px;
  border-bottom: 2px solid transparent;
  transition: color .2s, border-color .2s;
  font-weight: 500;
}
.about-cert-tab.cur {
  color: #BF4F53;
  border-bottom: 2.5px solid #BF4F53;
}

/* Swiper容器 */
.about-cert-swiper {
  position: relative;
  width: 100%;
  margin: 0 auto;
  overflow: hidden;
  min-height: 220px;
}
.about-cert-swiper-wrapper {
  display: flex;
  transition: transform 0.5s cubic-bezier(.4,0,.2,1);
  will-change: transform;
}
.about-cert-swiper-slide {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  flex: 0 0 20%;
  max-width: 20%;
  padding: 0 12px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-cert-swiper-slide img {
  width: 100%;
  max-width: 224px;
  border-radius: 10px;
  background: #f7f7f7;
}

/* 响应式图片数量 */
@media (max-width: 1400px) {
  .about-cert-swiper-slide { flex: 0 0 25%; max-width: 25%; }
}
@media (max-width: 1000px) {
  .about-cert-swiper-slide { flex: 0 0 33.3333%; max-width: 33.3333%; }
}
@media (max-width: 700px) {
  .about-cert-swiper-slide { flex: 0 0 50%; max-width: 50%; }
}
@media (max-width: 500px) {
  .about-cert-swiper-slide { flex: 0 0 66.6666%; max-width: 66.6666%; }
}

/* Swiper箭头 */
.about-cert-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 2px 8px rgba(0,0,0,0.13);
  transition: background .2s;
  padding: 0;
}
.about-cert-arrow-left { left: 8px; }
.about-cert-arrow-right { right: 8px; }
.about-cert-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;
  position: relative;
  
}
.about-cert-arrow-left:after {
  transform: rotate(135deg);
  margin-left: 1px;
  left:2px;
}
.about-cert-arrow-right:after {
  transform: rotate(-45deg);
  margin-right: 1px;
  right:2px;
}
.about-cert-arrow:hover {
  background: #BF4F53;
}
.about-cert-arrow:hover:after {
  border-color: #fff;
}
@media (max-width: 700px) {
  .about-cert-arrow { width: 28px; height: 28px; }
  .about-cert-arrow-left { left: 0; }
  .about-cert-arrow-right { right: 0; }
  .about-cert-arrow:after { width: 9px; height: 9px; border-width: 0 2px 2px 0; }
}

/* 专利认证标题 */
.about-cert-patent-title {
  text-align: center;
  font-size: 26px;
  color: #222;
  font-weight: bold;
  margin: 32px 0 0 0;
  letter-spacing: 2px;
}

/* 企业实力标题 */
.about-strength-title {
  font-size: 36px;
  font-weight: bold;
  color: #222;
  text-align: center;
  margin-bottom: 48px;
  letter-spacing: 2px;
}

/* 证书容器最大宽度 */
.about-cert-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  box-sizing: border-box;
}

.about-cert-slide-title {
  text-align: center;
  font-size: 16px;
  color: #333;
  margin-top: 12px;
  margin-bottom: 4px;
  font-weight: 500;
  letter-spacing: 1px;
}

/* 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 24px;
  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: 25px; }
.about-scene-arrow-right { right: 25px; }
.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: 2px;
}
.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-cert-section {
    width: 100vw;
    margin-left:0;
    transform: none;
    padding: 56px 0 60px 0;
}

.about-strength-title,.about-scene-title{
  font-size: 26px; margin-bottom: 25px;
}

.about-scene-section {
  margin-left: 0%;
  transform: none;
  padding: 50px 0 60px 0;
}

.about-scene-container{
  padding: 0 0;
}

.about-scene-arrow-left {
  left: 20px; display: none;
}

.about-scene-arrow-right {
  right: 20px; display: none;
}

}

/* 图片预览模态框样式 */
.image-preview-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  display: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.image-preview-modal.show {
  display: block;
  opacity: 1;
}

.image-preview-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(5px);
}

.image-preview-container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90%;
  height: 90%;
  max-width: 1200px;
  max-height: 800px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-preview-content {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.image-preview-img {
  max-width: 100%;
  max-height: 80%;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease;
}

.image-preview-img:hover {
  transform: scale(1.02);
}

.image-preview-caption {
  margin-top: 20px;
  color: #fff;
  font-size: 16px;
  text-align: center;
  font-weight: 500;
}

.image-preview-close {
  position: absolute;
  top: -50px;
  right: 0;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.2);
  border: none;
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  z-index: 10;
}

.image-preview-close:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
}

.image-preview-prev,
.image-preview-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.2);
  border: none;
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  z-index: 10;
}

.image-preview-prev {
  left: -80px;
}

.image-preview-next {
  right: -80px;
}

.image-preview-prev:hover,
.image-preview-next:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-50%) scale(1.1);
}

/* 证书图片点击样式 */
.cert-preview-img {
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cert-preview-img:hover {
  transform: scale(1.005);
}

/* 模态框打开时阻止页面滚动 */
body.modal-open {
  overflow: hidden;
}

.about-cert-arrow-right,.about-cert-arrow-left{
    top:47%;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .image-preview-container {
    width: 95%;
    height: 95%;
  }
  
  .image-preview-close {
    top: -40px;
    width: 35px;
    height: 35px;
  }
  
  .image-preview-prev,
  .image-preview-next {
    width: 40px;
    height: 40px;
  }
  
  .image-preview-prev {
    left: -60px;
  }
  
  .image-preview-next {
    right: -60px;
  }
  
  .image-preview-caption {
    font-size: 14px;
    margin-top: 15px;
  }
}

@media (max-width: 480px) {
    
    .about-culture-section{
        padding-bottom: 0;
    }
    
    
  .image-preview-prev {
    left: -50px;
  }
  
  .image-preview-next {
    right: -50px;
  }
  
  .image-preview-close {
    top: -35px;
    width: 30px;
    height: 30px;
  }
  
    .about-intro-stat {
        justify-content: flex-start;
        width: 200px;
    }
    
    .about-intro-right{
        padding-bottom:45px;
    }
  
    
    .about-cert-arrow-right,.about-cert-arrow-left{
        display: none;
    }
 

}