.section-title {
  font-size: 60px;
  font-weight: 700;
  color: #000;
  line-height: 1;
  text-transform: uppercase;
}

.section-subtitle {
  font-weight: 500;
  font-size: 22px;
  color: #A3A3A3;
  margin-top: 25px;
  line-height: 1;
}

.about-section {
  position: relative;
  width: 100%;
  padding: 197px 0 192px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.about-content {
  width: 100%;
  max-width: 1400px;
  margin-top: 60px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.about-overview {
  background-color: #000;
  background-image: url('../image/about-overview-bg.png');
  background-size: cover;
  background-position: center;
  padding: 95px 136px 0;
  min-height: 856px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.about-text-content {
  max-width: 680px;
}

.about-description {
  color: #fff;
  font-size: 18px;
  font-weight: 400;
  line-height: 26px;
  margin: 0 0 49px 0;
}

.about-button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: 225px;
  height: 55px;
  padding: 0 30px 0 45px;
  background-color: transparent;
  border: 1px solid #fff;
  color: white;
  font-size: 18px;
  font-weight: 400;
  border-radius: 28px;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.about-button::after {
  content: "";
  display: block;
  width: 15px;
  height: 12px;
  background: url(../image/button-arrow-right.png) repeat-x left center / 7.5px 12px;
}

.about-button:hover {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(223, 121, 61, 0.3);
}

.about-button:hover::after {
  animation: moveArrow 1s ease-in-out forwards infinite;
}

.about-image {
  position: absolute;
  top: 348px;
  left: 136px;
  right: 136px;
  width: 1128px;
  display: flex;
  height: 700px;
}


/* Product Center Section */
.product-section {
  width: 100%;
  padding: 180px 0 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.product-content {
  width: 100%;
  max-width: 1396px;
  margin-top: 102px;
  display: flex;
  gap: 161px;
  align-items: flex-start;
}

.product-image-container {
  flex-shrink: 0;
}

.product-image {
  width: 628px;
  height: 425px;
  object-fit: cover;
  margin-top: 40px;
  transition: transform 0.3s ease;
}

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

.product-details {
  flex: 1;
  max-width: 607px;
}

.product-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 427px;
}

.product-title {
  font-size: 56px;
  font-weight: 700;
  color: #000;
  line-height: 56px;
  margin: 0;
}

.product-arrow {
  width: 36px;
  height: 36px;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.product-arrow:hover {
  transform: translateX(5px);
}

.product-subtitle {
  font-size: 22px;
  font-weight: 500;
  color: var(--primary-color);
  line-height: 30px;
  margin: 45px 0 39px 1px;
}

.product-features {
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.feature-item {
  display: flex;
  gap: 20px;
  align-items: center;
}

.feature-icon {
  background-color: #E6E8F1;
  border-radius: 50%;
  width: 86px;
  height: 86px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.feature-icon:hover {
  transform: scale(1.05);
}

.feature-icon img {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

.feature-text {
  font-size: 16px;
  font-weight: 500;
  color: #818181;
  line-height: 24px;
  margin: 0;
  flex: 1;
}

/* Experience Section */
.experience-section {
  position: relative;
  width: 100%;
  padding: 176px 0 191px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.experience-section::before {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: -1;
  width: 100%;
  height: 2501px;
  background: #F7F8FB;

}

.experience-title {
  font-size: 46px;
  font-weight: 700;
  color: #000;
  line-height: 50px;
  text-align: center;
  margin: 0 0 46px 0;
}

.experience-title .highlight {
  color: var(--primary-color);
}

.offices-container {
  position: relative;
  width: 1332px;
  height: 724px;
  background: url(../image/offices-bg.png) no-repeat center center / cover;
}

.offices-container::before {
  content: '';
  position: absolute;
  top: 332px;
  left: 404px;
  width: 38px;
  height: 22px;
  background: url(../image/map-line1.png) no-repeat center center / contain;
}

.offices-container::after {
  content: '';
  position: absolute;
  top: 237px;
  left: 488px;
  width: 237px;
  height: 115px;
  background: url(../image/map-line2.png) no-repeat center center / contain;
}

.office-card {
  position: absolute;
  background-color: #fff;
  padding: 22px 32px 25px;
  width: 358px;
  box-sizing: border-box;
  transition: all 0.3s ease;
  opacity: 0.9;
  cursor: pointer;
}

.wuhan-office {
  top: 333px;
  left: 46px;
}

.shanghai-office {
  top: 197px;
  left: 725px;
}

.office-card:hover {
  opacity: 1;
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.office-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}

.location-icon {
  width: 46px;
  height: 46px;
}

.office-name {
  font-size: 18px;
  font-weight: 500;
  color: #000;
  line-height: 18px;
  margin: 0;
}

.office-detail {
  font-size: 16px;
  font-weight: 400;
  color: #818181;
  line-height: 1;
  margin: 0 0 19px 0;
}

.office-detail:last-child {
  margin-bottom: 0;
}

/* Particle Science Section */
.particle-science-section {
  background: linear-gradient(156.89deg, rgba(255, 249, 226, 1), rgba(249, 230, 219, 1) 100%);
  width: 100%;
  min-height: 980px;
  padding: 243px 0 0;
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.particle-content {
  width: 100%;
  max-width: 1920px;
  min-height: 737px;
}

.particle-text-content {
  max-width: 573px;
  margin-left: 260px;
}

.particle-title-group {
  margin-bottom: 48px;
}

.particle-description {
  font-size: 16px;
  font-weight: 500;
  color: #818181;
  line-height: 24px;
  margin: 0 0 89px 0;
}

.particle-image-wrapper {
  background-image: url('../image/particle-science-image.png');
  background-size: cover;
  background-position: center;
  width: 933px;
  height: 1185px;
  position: absolute;
  right: 0;
  top: -113px;
  padding: 505px 0 0 112px;
}

.particle-image-text {
  font-size: 32px;
  font-weight: 400;
  color: #fff;
  line-height: 44px;
  width: fit-content;
  text-align: center;
}

/* News Section */
.news-section {
  background-color: #fff;
  width: 100%;
  padding: 209px 0 186px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.news-header {
  width: 100%;
  max-width: 1399px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 56px;
}

.news-wrapper {
  max-width: 100%;
  overflow-x: auto;
  padding-bottom: 20px;
}

.news-wrapper::-webkit-scrollbar {
  display: none;
}

.news-grid {
  display: flex;
  gap: 50px;
  width: max-content;
  padding-left: max(20px, calc((100% - 1399px) / 2));
  padding-right: max(20px, calc((100% - 1399px) / 2));
}

.news-card {
  display: flex;
  flex-direction: column;
  gap: 34px;
  cursor: pointer;
  width: 600px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.news-card:hover {
  transform: translateY(-10px);
}


.news-image {
  width: 100%;
  height: 360px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.news-card:hover .news-image {
  transform: scale(1.05);
}

.news-text {
  font-size: 25px;
  font-weight: 400;
  color: #000;
  line-height: 30px;
  margin: 0 0 35px 0;
}

.news-date {
  font-size: 20px;
  font-weight: 400;
  color: #8F8F8F;
  line-height: 20px;
}

/* ==================== 响应式适配 ==================== */

/* 大屏幕 (1400px 以下) */
@media screen and (max-width: 1400px) {
  .about-content {
    max-width: 100%;
    padding: 0 20px;
  }

  .about-overview {
    padding: 80px 80px 0;
  }

  .about-image {
    width: calc(100% - 160px);
    left: 80px;
    right: 80px;
  }

  .product-content {
    max-width: 100%;
    padding: 0 40px;
    gap: 80px;
  }

  .offices-container {
    width: 100%;
    max-width: 1332px;
  }

  .particle-text-content {
    margin-left: 100px;
  }

  .particle-image-wrapper {
    width: 700px;
    height: 900px;
    padding: 400px 0 0 80px;
  }

  .news-header {
    max-width: 100%;
    padding: 0 40px;
  }
}

/* 平板设备 (1024px 以下) */
@media screen and (max-width: 1024px) {
  .section-title {
    font-size: 42px;
  }

  .section-subtitle {
    font-size: 18px;
  }

  .about-section {
    padding: 120px 0 150px;
  }

  .about-overview {
    padding: 60px 50px 0;
    min-height: 700px;
  }

  .about-text-content {
    max-width: 100%;
  }

  .about-image {
    position: relative;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: auto;
    flex-direction: column;
    margin-top: 40px;
  }

  .product-section {
    padding: 120px 0 0;
  }

  .product-content {
    flex-direction: column;
    gap: 40px;
    align-items: center;
    padding: 0 30px;
  }

  .product-image-container {
    width: 100%;
    text-align: center;
  }

  .product-image {
    width: 100%;
    max-width: 500px;
    height: auto;
    margin-top: 0;
  }

  .product-details {
    max-width: 100%;
    text-align: center;
  }

  .product-header {
    max-width: 100%;
    justify-content: center;
    gap: 20px;
  }

  .product-title {
    font-size: 42px;
  }

  .product-subtitle {
    margin: 30px 0;
  }

  .product-subtitle br {
    display: none;
  }

  .product-features {
    align-items: center;
  }

  .feature-item {
    max-width: 600px;
    text-align: left;
  }

  .experience-section {
    padding: 120px 20px 120px;
  }

  .experience-title {
    font-size: 32px;
    line-height: 1.3;
  }

  .experience-title br {
    display: none;
  }

  .offices-container {
    width: 100%;
    height: auto;
    min-height: 500px;
    background-size: contain;
    background-position: top center;
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 20px;
    position: relative;
  }

  .offices-container::before,
  .offices-container::after {
    display: none;
  }

  .office-card {
    position: relative;
    top: auto !important;
    left: auto !important;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
  }

  .particle-science-section {
    min-height: auto;
    padding: 120px 30px 60px;
  }

  .particle-content {
    display: flex;
    flex-direction: column;
    min-height: auto;
  }

  .particle-text-content {
    margin-left: 0;
    max-width: 100%;
    text-align: center;
  }

  .particle-title-group {
    margin-bottom: 30px;
  }

  .particle-description {
    margin: 0 0 40px 0;
    text-align: left;
  }

  .particle-image-wrapper {
    position: relative;
    width: 100%;
    height: 400px;
    right: 0;
    top: 0;
    margin-top: 40px;
    padding: 60px 30px 0;
    background-size: cover;
    background-position: center;
  }

  .particle-image-text {
    font-size: 24px;
    line-height: 1.5;
    text-align: center;
  }

  .particle-image-text br {
    display: none;
  }

  .news-section {
    padding: 120px 0 100px;
  }

  .news-header {
    flex-direction: column;
    align-items: center;
    gap: 30px;
    text-align: center;
    padding: 0 20px;
  }

  .news-grid {
    gap: 30px;
    padding-left: 20px;
    padding-right: 20px;
  }

  .news-card {
    width: 350px;
  }

  .news-image {
    height: 220px;
  }

  .news-text {
    font-size: 18px;
    line-height: 1.4;
  }

  .news-text br {
    display: none;
  }
}

/* 小平板/大手机 (768px 以下) */
@media screen and (max-width: 768px) {
  .section-title {
    font-size: 32px;
  }

  .section-subtitle {
    font-size: 16px;
    margin-top: 15px;
  }

  .about-section {
    padding: 80px 0 100px;
  }

  .about-overview {
    padding: 40px 25px 0;
    min-height: 500px;
  }

  .about-description {
    font-size: 15px;
    line-height: 1.6;
    margin: 0 0 30px 0;
  }

  .about-button {
    width: 180px;
    height: 45px;
    font-size: 14px;
    padding: 0 20px 0 30px;
  }

  .about-culture {
    height: 250px;
    padding-top: 50px;
  }

  .culture-title {
    font-size: 24px;
  }

  .culture-icon {
    width: 30px;
    height: 30px;
  }

  .product-section {
    padding: 80px 0 0;
  }

  .product-content {
    padding: 0 20px;
    margin-top: 60px;
  }

  .product-title {
    font-size: 32px;
    line-height: 1.2;
  }

  .product-arrow {
    width: 28px;
    height: 28px;
  }

  .product-subtitle {
    font-size: 18px;
    margin: 20px 0 25px;
  }

  .feature-icon {
    width: 60px;
    height: 60px;
  }

  .feature-icon img {
    width: 40px;
    height: 40px;
  }

  .feature-text {
    font-size: 14px;
    line-height: 1.5;
  }

  .experience-section {
    padding: 80px 15px;
  }

  .experience-title {
    font-size: 26px;
    margin-bottom: 30px;
  }

  .office-card {
    padding: 18px 25px;
  }

  .location-icon {
    width: 36px;
    height: 36px;
  }

  .office-name {
    font-size: 16px;
  }

  .office-detail {
    font-size: 14px;
  }

  .office-detail br {
    display: none;
  }

  .particle-science-section {
    padding: 80px 20px 50px;
  }

  .particle-description {
    font-size: 14px;
    line-height: 1.6;
  }

  .particle-image-wrapper {
    height: 300px;
    padding: 40px 20px 0;
  }

  .particle-image-text {
    font-size: 18px;
  }

  .news-section {
    padding: 80px 0 60px;
  }

  .news-header {
    margin-bottom: 40px;
  }

  .news-card {
    width: 280px;
    gap: 20px;
  }

  .news-image {
    height: 180px;
  }

  .news-text {
    font-size: 16px;
    margin: 0 0 20px 0;
  }

  .news-date {
    font-size: 14px;
  }
}

/* 手机设备 (480px 以下) */
@media screen and (max-width: 480px) {
  .section-title {
    font-size: 26px;
  }

  .section-subtitle {
    font-size: 14px;
  }

  .about-section {
    padding: 60px 0 80px;
  }

  .about-overview {
    padding: 30px 20px 0;
    min-height: 400px;
  }

  .about-description {
    font-size: 14px;
  }

  .about-culture {
    height: 200px;
    padding-top: 40px;
  }

  .culture-title {
    font-size: 20px;
  }

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

  .product-content {
    padding: 0 15px;
    margin-top: 40px;
  }

  .product-title {
    font-size: 26px;
  }

  .product-subtitle {
    font-size: 16px;
  }

  .feature-item {
    gap: 15px;
  }

  .feature-icon {
    width: 50px;
    height: 50px;
  }

  .feature-icon img {
    width: 32px;
    height: 32px;
  }

  .feature-text {
    font-size: 13px;
  }

  .experience-section {
    padding: 60px 10px;
  }

  .experience-title {
    font-size: 22px;
    margin-bottom: 25px;
  }

  .office-card {
    padding: 15px 20px;
  }

  .office-header {
    gap: 10px;
    margin-bottom: 15px;
  }

  .location-icon {
    width: 32px;
    height: 32px;
  }

  .office-name {
    font-size: 15px;
  }

  .office-detail {
    font-size: 13px;
    margin-bottom: 8px;
  }

  .particle-science-section {
    padding: 60px 15px 40px;
  }

  .particle-image-wrapper {
    height: 250px;
    padding: 30px 15px 0;
  }

  .particle-image-text {
    font-size: 16px;
  }

  .news-section {
    padding: 60px 0 50px;
  }

  .news-card {
    width: 250px;
    gap: 15px;
  }

  .news-image {
    height: 150px;
  }

  .news-text {
    font-size: 14px;
    margin: 0 0 15px 0;
  }

  .news-date {
    font-size: 13px;
  }
}