/* ===== 通用 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ===== 轮播图 ===== */
.carousel {
  margin-top: 90px;
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 700px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.carousel-inner {
  position: relative;
  width: 100%;
  height: 100%;
}

.carousel-item {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
}

.carousel-item.active {
  opacity: 1;
}



/* 图片保持在下面 */
.carousel-item img {
  width: 100%;
  height: 100%;
  z-index: 1;
  position: relative;
}

.carousel-caption {
  position: absolute;
  left: 150px;
  bottom: 100px;
  z-index: 2;
  max-width: 600px;
  padding: 20px 25px;
  border-radius: 8px;
  animation: fadeInUp 0.8s ease-out;
}

.carousel-caption h1 {
  margin: 0;
  font-size: 48px;
  font-weight: 600;
  color: #fff;
  line-height: 1.3;
}

.carousel-indicators {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 3;
}

.indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: all 0.3s ease;
}

.indicator.active {
  background: #fff;
  transform: scale(1.2);
}

.indicator:hover {
  background: rgba(255, 255, 255, 0.8);
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  background: rgba(0, 0, 0, 0.5);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  z-index: 3;
  transition: all 0.3s ease;
  display: flex;
  justify-content: center;
  align-items: center;
}

.carousel-btn:hover {
  background: rgba(0, 0, 0, 0.7);
  transform: translateY(-50%) scale(1.1);
}

.carousel-btn.prev {
  left: 20px;
}

.carousel-btn.next {
  right: 20px;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 关于我们部分 - 修复移动端问题 ===== */
.section-about {
  width: 100%;
  min-height: 700px;
  background: #f7f9fc;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 60px 0 0 0;
}

.about-container {
  padding: 0;
  background: #f7f9fc;
  max-width: 1500px;
  width: 92%;
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  align-items: stretch;
  /* ★ 让左右两边等高 */
  gap: 40px;
  border-radius: 12px;
}

.about-image {
  flex: 1;
  min-width: 0;
  /* 防止flex item溢出 */
}

.about-image>div {
  width: 100%;
  height: 100%;
  /* ★ 视频容器跟随右侧高度 */
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.about-image iframe {
  width: 100%;
  height: 100%;
  /* ★ iframe 填满容器 */
  object-fit: cover;
  /* ★ 让视频更自然 */
}

.about-content {
  flex: 1;
  min-width: 0;
  /* 防止flex item溢出 */
  padding: 40px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.about-title {
  font-size: 2rem;
  font-weight: 700;
  color: #111;
  line-height: 1.2;
  margin-bottom: 10px;
}

.about-paragraph {
  font-size: 1rem;
  line-height: 1.8;
  color: #444;
}


.about-buttons {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  text-decoration: none;
  cursor: pointer;
  border: none;
  outline: none;
}

.button-primary {
  background: linear-gradient(135deg, #1a73e8, #0d47a1);
  color: #fff;
  box-shadow: 0 4px 14px rgba(26, 115, 232, 0.4);
}

.button-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(26, 115, 232, 0.5);
}

.button-secondary {
  background: #fff;
  color: #1a73e8;
  border: 2px solid #1a73e8;
}

.button-secondary:hover {
  background: #f0f7ff;
  transform: translateY(-3px);
}

/* ========= 移动端响应式修复 ========= */
@media (max-width: 1024px) {
  .section-about {
    padding: 40px 0;
    min-height: auto;
  }

  .about-container {
    width: 95%;
    gap: 30px;
  }

  .about-content {
    padding: 30px;
  }

  .about-paragraph {
    font-size: 0.95rem;
  }
}

@media (max-width: 768px) {
  .section-about {
    padding: 30px 0;
    height: auto;
  }

  .about-container {
    flex-direction: column;
    width: 100%;
    max-width: 100%;
    border-radius: 0;
    gap: 0;
    padding: 0;
  }

  .about-image {
    width: 100%;
    padding: 20px;
    padding-bottom: 0;
  }


  .about-content {
    width: 100%;
    margin-left: 0;
    border-radius: 0;
    padding: 30px 20px;
    box-shadow: none;
    border-top: 1px solid #eaeaea;
  }

  .about-text {
    gap: 18px;
  }

  .about-title {
    font-size: 1.8rem;
    text-align: center;
    margin-bottom: 15px;
  }

  .about-paragraph {
    font-size: 0.95rem;
    line-height: 1.7;
    text-align: left;
  }

  .about-buttons {
    margin-top: 25px;
    justify-content: center;
    gap: 15px;
    flex-direction: column;
    align-items: center;
  }

  .button {
    width: 100%;
    max-width: 280px;
    padding: 14px 24px;
  }
}

@media (max-width: 1024px) {
  .about-image>div {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    /* 16:9 */
    height: 0;
    /* 关键：让 iframe 根据 padding-bottom 形成高度 */
  }

  .about-image iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }
}

@media (max-width: 480px) {
  .section-about {
    padding: 20px 0;
  }

  .about-image {
    padding: 15px;
    padding-bottom: 0;
  }

  .about-content {
    padding: 25px 15px;
  }

  .about-title {
    font-size: 1.6rem;
  }

  .about-paragraph {
    font-size: 0.9rem;
    line-height: 1.6;
  }

  .about-buttons {
    margin-top: 20px;
    gap: 12px;
  }

  .button {
    padding: 12px 20px;
    font-size: 0.95rem;
  }
}

@media (max-width: 360px) {
  .about-title {
    font-size: 1.4rem;
  }

  .about-paragraph {
    font-size: 0.85rem;
  }

  .about-buttons {
    gap: 10px;
  }
}

/* 修复其他部分在移动端的标题字体大小 */
@media (max-width: 768px) {

  .section-header h2,
  .history-title,
  .Company-title,
  .company-tour-title,
  .partner-case-title,
  .equipment-title,
  .news-header h2,
  .advantages-title,
  .certification-title,
  .partners-title,
  .faq-title {
    font-size: 1.8rem !important;
    line-height: 1.3;
    padding: 0 15px;
    margin: 0 auto 15px;
  }

  .section-header p,
  .history-intro,
  .company-tour-intro,
  .partner-case-intro,
  .equipment-intro,
  .news-header p,
  .advantages-subtitle,
  .certification-subtitle,
  .faq-subtitle {
    font-size: 0.95rem !important;
    line-height: 1.6;
    padding: 0 15px;
    margin: 0 auto 25px;
  }
}

@media (max-width: 480px) {

  .section-header h2,
  .history-title,
  .Company-title,
  .company-tour-title,
  .partner-case-title,
  .equipment-title,
  .news-header h2,
  .advantages-title,
  .certification-title,
  .partners-title,
  .faq-title {
    font-size: 1.5rem !important;
  }

  .section-header p,
  .history-intro,
  .company-tour-intro,
  .partner-case-intro,
  .equipment-intro,
  .news-header p,
  .advantages-subtitle,
  .certification-subtitle,
  .faq-subtitle {
    font-size: 0.9rem !important;
  }
}

/* 修复新闻部分的移动端显示 */
@media (max-width: 768px) {
  .news-item {
    width: 100%;
    max-width: 100%;
    margin-bottom: 15px;
  }

  .news-item-image {
    height: 200px;
  }

  .news-item-content {
    padding: 20px;
  }

  .news-item-title {
    font-size: 1.2rem;
  }
}

.Company-section {
  width: 100%;
  padding: 130px 0 80px 0;
  background: #f7f9fc;
}

.Company-inner {
  width: 80%;
  max-width: 1200px;
  margin: 0 auto;
}

.Company-title {
  font-size: 2.8rem;
  font-weight: 700;
  text-align: center;
  color: #111;
  margin-bottom: 20px;
}

/* =========  发展历程  ========= */
.history-section {
  width: 100%;
  padding: 50px 0 40px 0;
  background: #f7f9fc;
}

.history-inner {
  width: 80%;
  max-width: 1200px;
  margin: 0 auto;
}

.history-title {
  font-size: 2.8rem;
  font-weight: 700;
  text-align: center;
  color: #111;
  margin-bottom: 20px;
}

.history-intro {
  font-size: 1.2rem;
  line-height: 1.8;
  color: #444;
  text-align: center;
  margin-bottom: 60px;
}

.timeline {
  position: relative;
  padding-left: 30px;
  border-left: 3px solid #5dade2;
}

.timeline-item {
  position: relative;
  margin-bottom: 50px;
}

.timeline-dot {
  position: absolute;
  left: -42px;
  top: 0;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #5dade2;
  border: 4px solid #fff;
  box-shadow: 0 0 0 3px #5dade2;
}

.timeline-content {
  background: #fff;
  padding: 25px 30px;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
  position: relative;
}

.timeline-content .year {
  display: inline-block;
  font-size: 1.4rem;
  font-weight: 700;
  color: #5dade2;
  margin-bottom: 10px;
}

.timeline-content h3 {
  font-size: 1.2rem;
  margin: 8px 0 12px;
  color: #222;
}

.timeline-content p {
  font-size: 1rem;
  line-height: 1.7;
  color: #555;
}

/* =========  公司实景  ========= */
.company-tour-section {
  width: 100%;
  background: #f7f9fc;
  text-align: center;
}

.company-tour-inner {
  width: 80%;
  max-width: 1200px;
  margin: 0 auto;
}

.company-tour-title {
  font-size: 2.8rem;
  font-weight: 700;
  color: #111;
  margin-bottom: 20px;
}

.company-tour-intro {
  font-size: 1.2rem;
  line-height: 1.8;
  color: #444;
  margin-bottom: 40px;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}

.image-item {
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
  height: 250px;
}

.image-item:hover {
  transform: translateY(-5px);
}

.company-tour-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 12px;
  transition: transform 0.3s ease;
}

.image-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  padding: 10px;
  font-size: 1rem;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.image-item:hover .image-caption {
  opacity: 1;
}

/* =========  合作案例  ========= */
.partner-case-section {
  width: 100%;
  padding: 80px 0;
  background: #f7f9fc;
  text-align: center;
}

.partner-case-inner {
  width: 80%;
  max-width: 1200px;
  margin: 0 auto;
}

.partner-case-title {
  font-size: 2.8rem;
  font-weight: 700;
  color: #111;
  margin-bottom: 20px;
}

.partner-case-intro {
  font-size: 1.2rem;
  line-height: 1.8;
  color: #444;
  margin-bottom: 40px;
}

.partner-case-images {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 30px;
}

.partner-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  border: 1px solid #ddd;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
  padding: 20px;
}

.partner-logo img {
  border-radius: 20px;
  width: 330px;
  height: 200px;
  margin: 20px 0;
}

.partner-image img {
  transition: transform 0.3s ease;
}

.partner-image img:hover {
  transform: scale(1.1);
}

.partner-caption {
  padding: 15px;
  font-size: 1.2rem;
  color: #444;
  z-index: 1;
}

.high-precision-equipment-section {
  width: 100%;
  background: #f7f9fc;
  text-align: center;
}

.equipment-inner {
  width: 80%;
  max-width: 1350px;
  margin: 0 auto;
  padding: 80px 0 0 0;
}

.equipment-title {
  font-size: 2.8rem;
  font-weight: 700;
  color: #111;
  margin-bottom: 20px;
}

.equipment-intro {
  font-size: 1.2rem;
  line-height: 1.8;
  color: #444;
  margin-bottom: 40px;
}

.equipment-images {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}

.equipment-item {
  border: 1px solid #ddd;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
  padding: 20px;
  text-decoration: none;
}

.equipment-image {
  width: 100%;
  border-radius: 10px;
  height: auto;
  transition: transform 0.3s ease;
}

.equipment-image:hover {
  transform: scale(1.1);
}

.equipment-description {
  padding: 20px;
  font-size: 1rem;
  background: #fff;
  color: #444;
  margin-top: 15px;
}

.equipment-description h3 {
  font-size: 19px;
  font-weight: bolder;
  margin-bottom: 10px;
}

.equipment-description p {
  font-size: 14px;
}

.equipment-link,
.equipment-consult {
  display: inline-block;
  margin-top: 10px;
  padding: 10px 20px;
  border-radius: 5px;
  text-decoration: none;
  color: #007bff;
  transition: background-color 0.3s ease;
}

/* 新闻中心 */
.news-section {
  width: 100%;
  background: #f7f9fc;
  text-align: center;
  padding: 65px 0;
}

.news-header h2 {
  font-size: 2.8rem;
  font-weight: 700;
  color: #333;
  margin-bottom: 10px;
}

.news-header p {
  font-size: 1.2rem;
  color: #666;
}

.news-subtitle-wrapper {
  width: 100%;
  display: flex;
  justify-content: center;
}

.news-subtitle {
  font-size: 1.4rem;
  font-weight: 600;
  color: #070707;
  margin-top: 20px;
  margin-bottom: 20px;
  width: 100%;
  max-width: 1220px;
  padding-left: 10px;
  text-align: left;
}

.news-subtitle-description {
  font-size: 1rem;
  color: #666;
  margin-bottom: 20px;
}

.news-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  text-decoration: none;
}

.news-list a {
  text-decoration: none;
}

.news-item {
  width: 600px;
  border: 1px solid #ddd;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease;
  margin-bottom: 20px;
  height: 100%;
}

.news-item:hover {
  transform: translateY(-5px);
}

.news-item-image {
  width: 100%;
  height: 350px;
}

.news-item-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-item-content {
  padding: 35px;
  height: 100%;
}

.news-item-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: #333;
  text-decoration: none;
}

.news-item-title:hover {
  color: rgb(26, 115, 232);
  cursor: pointer;
}

.news-item-date {
  font-size: 1rem;
  color: #999;
  margin-top: 10px;
  margin-bottom: 10px;
}

.news-item-excerpt {
  font-size: 1rem;
  color: #666;
  margin-bottom: 10px;
}

.news-item-readmore {
  display: inline-block;
  padding: 10px 20px;
  background-color: #007bff;
  color: #fff;
  text-decoration: none;
  border-radius: 5px;
  transition: background-color 0.3s ease;
}

.news-item-readmore:hover {
  background-color: #0056b3;
}

.news-item-more {
  margin-top: 30px;
  text-align: center;
}

.news-item-more .news-item-readmore {
  border: 1px solid #007bff;
  background-color: #f0f7ff;
  color: #007bff;
}

.news-item-more .news-item-readmore:hover {
  border: 1px solid #007bff;
  color: #f0f7ff;
  background-color: #007bff;
}

.arrow {
  margin-left: 5px;
}

/* =========  技术优势  ========= */
.tech-advantages-section {
  width: 100%;
  background: #f7f9fc;
  text-align: center;
}

.advantages-container {
  width: 80%;
  padding: 0px 0 0 0;
  max-width: 1200px;
  margin: 0 auto;
}

.advantages-title {
  font-size: 2.8rem;
  font-weight: 700;
  color: #333;
  margin-bottom: 20px;
}

.advantages-subtitle {
  font-size: 1.2rem;
  color: #666;
  margin-bottom: 40px;
}

.advantages-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin-top: 40px;
}

.advantage-item {
  background: #f7f9fc;
  padding: 20px;
  border: 1px solid #ddd;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
  transition: border-color 0.3s ease;
  width: calc(33.333% - 20px);
  box-sizing: border-box;
}

.advantage-item:hover {
  border-color: #007bff;
}

.advantage-icon {
  font-size: 2rem;
  margin-bottom: 10px;
}

.advantage-icon img {
  width: 45px;
  height: 45px;
}

.advantage-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: #333;
  margin-bottom: 10px;
}

.advantage-desc {
  font-size: 1rem;
  color: #666;
  line-height: 1.6;
}

/* =========  认证与专利  ========= */
.certification-section {
  width: 100%;
  padding: 80px 0;
  background: #f7f9fc;
  text-align: center;
}

.certification-container {
  width: 90%;
  max-width: 1400px;
  margin: 0 auto;
}

.certification-title {
  font-size: 2.8rem;
  font-weight: 700;
  color: #333;
  margin-bottom: 20px;
}

.certification-subtitle {
  font-size: 1.2rem;
  color: #666;
  margin-bottom: 40px;
}

.certification-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  gap: 20px;
}

.certification-item {
  width: 300px;
  height: 460px;
  border: 1px solid #ddd;
  overflow: hidden;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
  margin-bottom: 20px;
}

.certification-image {
  width: 100%;
  height: 400px;
  max-width: 100%;
  max-height: 800px;
  display: block;
}

.certification-caption {
  padding: 20px;
  font-size: 1.2rem;
  background: #fff;
  color: #444;
  margin-top: -10px;
  z-index: 1;
}

/* =========  合作伙伴  ========= */
.partners-section {
  width: 100%;
  background: #f7f9fc;
  text-align: center;
}

.partners-container {
  padding-bottom: 50px;
  margin: 0 auto;
}

.partners-title {
  font-size: 2.8rem;
  font-weight: 700;
  color: #333;
  margin-bottom: 40px;
}

.partners-grid {
  max-width: 1400px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(20px, 10vw, 100px);
  margin: 0 auto;
}

.partner-image {
  width: 400px;
  height: 200px;
  border: 1px solid #ddd;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
  margin-bottom: 20px;
  max-width: 100%;
  object-fit: cover;
}

.partner-image:hover {
  transform: scale(1.1);
}

/* 适用场景 */
.scenes-section {
  width: 100%;
  padding: 80px 80px;
  background: rgb(247, 249, 252);
}

.section-header {
  text-align: center;
  margin: 0 auto 28px;
  max-width: 980px;
}

.section-header h2 {
  font-size: 2.8rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.section-header p {
  font-size: 1.2rem;
  color: #6b7280;
  margin: 0;
  margin-bottom: 20px;
}

.scenes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  width: 90%;
  max-width: 1250px;
  margin: 0 auto;
}

.scene-card {
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, .06);
  transition: transform .2s ease;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  text-decoration: none;
}

.scene-card:hover {
  transform: translateY(-2px);
}

.card-image {
  width: 100%;
  height: 350px;
  display: block;
}

.card-content {
  padding: 16px 20px 20px;
}

.card-title {
  font-size: 1.15rem;
  margin: 0 0 6px;
  color: #111827;
}

.card-desc {
  color: #6b7280;
  font-size: 0.95rem;
  line-height: 1.5;
  margin: 0 0 12px;
}

.card-link {
  color: #1a73e8;
  text-decoration: none;
  font-weight: 500;
}

.card-link:hover,
.card-link:focus {
  text-decoration: underline;
  outline: none;
}

.button-footer {
  display: flex;
  justify-content: center;
  margin-top: 40px;
}

/* FAQ 样式 */
.faq-section {
  width: 100%;
  padding: 80px 0 10px 0;
  background: #f7f9fc;
  text-align: center;
}

.faq-inner {
  width: 100%;
  max-width: 1350px;
  margin: 0 auto;
}

.faq-title {
  font-size: 2.8rem;
  font-weight: 700;
  color: #111;
  text-align: center;
  margin-bottom: 30px;
}

.faq-subtitle {
  font-size: 1.2rem;
  color: #666;
  margin-bottom: 40px;
  line-height: 1.6;
}

.faq-list {
  list-style: none;
  padding: 0;
  max-width: 1380px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 20px;
  border: 1px solid #e1e5eb;
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.faq-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 24px 30px;
  background: #fff;
  border: none;
  font-size: 1.1rem;
  cursor: pointer;
  text-align: left;
  color: #303030;
  font-weight: 600;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.faq-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
  color: #666;
}

.faq-answer {
  display: none;
  padding: 0 30px 30px;
  background: #fff;
  font-size: 0.9rem;
  line-height: 1.7;
  color: #555;
  text-align: left;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

/* ========= 移动端适配 ========= */
@media (max-width: 1024px) {
  .carousel-caption h1 {
    font-size: 22px;
  }

  .history-section,
  .Company-section {
    padding: 40px 0;
  }

  .carousel {
    margin-top: 80px;
    height: 60vh;
  }

  .carousel-btn {
    width: 36px;
    height: 36px;
    font-size: 22px;
  }

  .carousel-btn.prev {
    left: 8px;
  }

  .carousel-btn.next {
    right: 8px;
  }

  .carousel-caption {
    left: 40px;
    bottom: 30px;
    padding: 15px;
  }

  .section-about {
    height: auto;
    min-height: auto;
    padding: 40px 0;
    display: block;
  }

  .about-container {
    padding: 0;
    max-width: 100%;
    height: auto;
    flex-direction: column;
    border-radius: 0;
    margin: 0;
    width: 100%;
  }

  .about-image {
    width: 100%;
    height: 300px;
    margin-bottom: 20px;
  }

  .about-image-img {
    width: 100%;
    height: 100%;
    border-radius: 0;
    object-fit: cover;
  }

  .about-content {
    margin-left: 0px;
    flex: none;
    padding: 40px 20px;
    width: 100%;
    background: #fff;
  }

  .about-text {
    gap: 15px;
    text-align: center;
  }

  .about-title {
    font-size: 1.8rem;
    margin-bottom: 10px;
  }

  .about-paragraph {
    font-size: 0.95rem;
    line-height: 1.6;
    text-align: left;
  }

  .about-buttons {
    margin-top: 20px;
    justify-content: center;
    gap: 15px;
    flex-direction: column;
    align-items: center;
  }

  .history-inner,
  .company-tour-inner,
  .partner-case-inner,
  .equipment-inner,
  .advantages-container {
    width: 92%;
  }

  .equipment-inner {
    padding: 20px 0 0 0 !important;
  }

  .timeline {
    padding-left: 20px;
  }

  .timeline-dot {
    left: -32px;
    width: 14px;
    height: 14px;
  }

  .timeline-content {
    padding: 18px 20px;
  }

  .image-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
  }

  .image-item {
    height: 160px;
  }

  .partner-case-images,
  .equipment-images {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .partner-logo img {
    width: 100%;
    height: auto;
    max-height: 160px;
    object-fit: cover;
  }

  .news-list {
    flex-direction: column;
    align-items: center;
  }

  .news-item {
    width: 100%;
    max-width: 400px;
  }

  .advantage-item {
    width: 100%;
  }

  .certification-container {
    width: 92%;
  }

  .certification-grid {
    flex-direction: column;
    align-items: center;
  }

  .certification-item {
    width: 100%;
    max-width: 300px;
  }

  .partners-container {
    width: 92%;
  }

  .partner-image {
    width: 100%;
    max-width: 400px;
    height: auto;
  }

  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

  .partners-grid {
    gap: 60px;
  }

  .scenes-grid {
    grid-template-columns: 1fr;
    width: 92%;
  }
}

@media (max-width: 768px) {
  .carousel {
    margin-top: -10px !important;
    height: 300px !important;
    border-radius: 0;
  }

  .carousel-caption {
    left: 20px;
    bottom: 20px;
    padding: 15px;
    max-width: calc(100% - 40px);
  }

  .carousel-caption h1 {
    font-size: 20px;
  }

  .carousel-btn {
    width: 40px;
    height: 40px;
    font-size: 18px;
  }

  .carousel-btn.prev,
  .carousel-btn.next {
    display: none;
  }

  .indicator {
    width: 10px;
    height: 10px;
  }

  .section-header h2,
  .history-title,
  .Company-title,
  .company-tour-title,
  .partner-case-title,
  .equipment-title,
  .news-header h2,
  .advantages-title,
  .certification-title,
  .partners-title {
    font-size: 1.6rem !important;
    line-height: 1.3;
    padding: 0 20px;
    margin: 0 auto 12px;
    text-align: center;
  }

  .section-header p,
  .history-intro,
  .company-tour-intro,
  .partner-case-intro,
  .equipment-intro,
  .news-header p,
  .advantages-subtitle,
  .certification-subtitle {
    font-size: 0.9rem !important;
    line-height: 1.5;
    color: #6b7280;
    padding: 0 20px;
    margin: 0 auto 30px;
    text-align: center;
  }

  .certification-section {
    padding: 0;
  }

  .scenes-section {
    padding: 30px 0 40px;
  }

  .history-section,
  .Company-section {
    padding: 0px 0 30px 0;
  }

  .section-header {
    margin: 0 auto 20px;
    padding: 0 20px;
  }

  .section-header h2 {
    font-size: 1.6rem;
  }

  .section-header p {
    font-size: 0.9rem;
  }

  .scenes-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    width: 92%;
  }

  .scene-card {
    border-radius: 12px;
  }

  .card-image {
    height: 200px;
  }

  .card-content {
    padding: 14px 16px 16px;
  }

  .card-title {
    font-size: 1.05rem;
  }

  .card-desc {
    font-size: 0.9rem;
  }

  .faq-section {
    padding: 60px 0;
  }

  .faq-inner {
    width: 92%;
  }

  .faq-title {
    font-size: 1.6rem;
    margin-bottom: 20px;
  }

  .faq-subtitle {
    font-size: 0.9rem;
    margin-bottom: 30px;
  }

  .faq-question {
    padding: 18px 20px;
    font-size: 1rem;
  }

  .faq-answer {
    padding: 0 20px 20px;
    font-size: 0.95rem;
  }

  .partners-grid {
    gap: 40px;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .carousel {
    height: 300px !important;
  }

  .carousel-caption h1 {
    font-size: 18px !important;
  }

  .section-about {
    padding: 30px 0;
  }

  .about-image {
    height: 250px;
  }

  .history-section {
    padding: 0px 0 20px 0;
  }

  .Company-section {
    padding: 0px 0 40px 0;
  }

  .about-content {
    margin-left: 0px;
    background: #fff;
    padding: 30px 15px;
  }

  .about-title {
    font-size: 1.6rem;
  }

  .about-paragraph {
    font-size: 0.9rem;
    line-height: 1.5;
  }

  .about-buttons {
    gap: 10px;
  }

  .button {
    width: 100%;
    max-width: 280px;
    padding: 12px 20px;
    font-size: 0.9rem;
  }

  .section-header h2,
  .history-title,
  .Company-title,
  .company-tour-title,
  .partner-case-title,
  .equipment-title,
  .news-header h2,
  .advantages-title,
  .certification-title,
  .partners-title {
    font-size: 1.8rem !important;
    padding: 0 15px;
  }

  .section-header p,
  .history-intro,
  .company-tour-intro,
  .partner-case-intro,
  .equipment-intro,
  .news-header p,
  .advantages-subtitle,
  .certification-subtitle {
    font-size: 0.85rem !important;
    padding: 0 15px;
  }

  .scenes-section {
    padding: 20px 0 30px;
  }

  .section-header {
    margin: 0 auto 15px;
  }

  .section-header h2 {
    font-size: 1.4rem;
  }

  .section-header p {
    font-size: 0.85rem;
  }

  .scenes-grid {
    gap: 16px;
    width: 94%;
  }

  .card-image {
    height: 180px;
  }

  .card-content {
    padding: 12px 14px 14px;
  }

  .card-title {
    font-size: 1rem;
  }

  .card-desc {
    font-size: 0.85rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }

  .faq-section {
    padding: 40px 0;
  }

  .faq-title {
    font-size: 1.4rem;
  }

  .faq-subtitle {
    font-size: 0.85rem;
  }

  .faq-question {
    padding: 16px 18px;
    font-size: 0.95rem;
  }

  .faq-answer {
    padding: 0 18px 18px;
    font-size: 0.9rem;
  }

  .partners-grid {
    gap: 30px;
  }
}

@media (max-width: 360px) {
  .carousel {
    height: 200px !important;
  }

  .about-image {
    height: 200px;
  }

  .about-title {
    font-size: 1.4rem;
  }

  .about-paragraph {
    font-size: 0.85rem;
  }
}

@media (max-width: 400px) {
  .news-subtitle {
    display: block !important;
    font-size: 18px;
  }
}

@media (max-width: 1220px) {
  .news-subtitle {
    display: none;
  }
}

@media (max-width: 1350px) {
  .about-paragraph {
    font-size: 0.9rem;
  }
}