/* 专利证书页面样式 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* 页面横幅样式 */
.page-banner {
  position: relative;
  width: 100%;
  height: 280px;
  background-image: url('../static/img/home.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  align-items: center;
  margin: 0;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(30, 118, 185, 0.8) 0%, rgba(30, 118, 185, 0.4) 50%, rgba(30, 118, 185, 0.15) 100%);
}

.page-banner .banner-content {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding-left: 40px;
  color: #fff;
}

.page-banner .banner-title-zh {
  margin: 0 0 10px;
  font-size: 32px;
  font-weight: 400;
  color: #fff;
  letter-spacing: 3px;
}

.page-banner .banner-title-en {
  margin: 0;
  font-size: 32px;
  font-weight: 400;
  color: #fff;
  letter-spacing: 4px;
  text-transform: uppercase;
}

@media (max-width: 768px) {
  .page-banner {
    height: 200px;
  }
  .page-banner .banner-content {
    padding-left: 30px;
  }
  .page-banner .banner-title-zh {
    font-size: 32px;
  }
  .page-banner .banner-title-en {
    font-size: 24px;
  }
}

@media (max-width: 480px) {
  .page-banner {
    height: 160px;
  }
  .page-banner .banner-content {
    padding-left: 20px;
  }
  .page-banner .banner-title-zh {
    font-size: 26px;
    letter-spacing: 2px;
  }
  .page-banner .banner-title-en {
    font-size: 18px;
    letter-spacing: 2px;
  }
}

/* main 容器样式 */
main {
  width: 1200px;
  margin: 0 auto;
  padding: 0;
  line-height: 1.9;
}
@media (max-width: 1280px) {
  main { width: auto; max-width: 100%; padding: 0 12px; }
}

/* 面包屑导航样式 */
.breadcrumb {
  padding: 20px 0;
  font-size: 14px;
  color: #999;
  max-width: 1200px;
  margin: 0 auto;
}

.breadcrumb a {
  color: #666;
  text-decoration: none;
  transition: color 0.2s;
}

.breadcrumb a:hover {
  color: var(--brand, #5db8c3);
}

.breadcrumb svg {
  vertical-align: middle;
  margin-right: 4px;
  margin-bottom: 2px;
}

.breadcrumb .separator {
  margin: 0 8px;
}

.breadcrumb .current {
  color: #333;
  font-weight: 500;
}

/* 标题段样式（与首页一致） */
.section-title {
  text-align: center;
  margin: 38px 0 24px;
}

.section-title .zh {
  margin: 0;
  font-size: 36px;
  font-weight: 700;
  color: #1e76b9;
  letter-spacing: 1px;
}

.section-title .en {
  margin-top: 8px;
  font-size: 16px;
  color: #9fb3c4;
  letter-spacing: 1px;
}

@media (max-width: 640px) {
  .section-title {
    margin: 30px 0 20px;
  }
  .section-title .zh {
    font-size: 26px;
  }
  .section-title .en {
    font-size: 14px;
  }
}

/* 选项卡导航样式 */
.about-tabs {
  display: none;
  justify-content: flex-start;
  align-items: center;
  gap: 0;
  margin: 24px 0;
}

.about-tabs .tab-item {
  padding: 12px 24px;
  font-size: 16px;
  color: #333;
  text-decoration: none;
  white-space: nowrap;
  background: transparent;
  border: none;
  transition: all 0.3s ease;
}

.about-tabs .tab-item.active {
  background: #5db8c3;
  color: #fff;
}

.about-tabs .tab-item:hover:not(.active) {
  color: #5db8c3;
}

/* 响应式适配 */
@media (max-width: 768px) {
  .about-tabs {
    display: flex;
    flex-wrap: wrap;
  }
  .about-tabs .tab-item {
    padding: 10px 18px;
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  .about-tabs .tab-item {
    padding: 8px 14px;
    font-size: 13px;
  }
}

/* 资质荣誉内容样式 */
.honor-content {
  margin: 30px 0;
  padding: 0;
  min-height: 400px;
}

/* 专利模块样式 */
.patent-section { margin-bottom: 40px; }
.patent-tabs { display: flex; gap: 12px; align-items: center; margin: 20px 0; }
.patent-tabs .tab-item { padding: 10px 18px; font-size: 14px; color: #333; text-decoration: none; background: #f5f7fa; border: 1px solid #e6edf3; border-radius: 4px; }
.patent-tabs .tab-item.active { background: #2c5aa0; color: #fff; border-color: #2c5aa0; }
.patent-tabs .tab-item:not(.active):hover { color: #1e76b9; }
.patent-tabs .tab-item.active:hover { color: #fff; }
.patent-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.patent-item { background: #fff; border: 1px solid #e6edf3; border-radius: 6px; padding: 10px; text-align: center; }
.patent-item img { width: 100%; height: 180px; object-fit: cover; border-radius: 4px; display: block; }
.patent-item p { margin: 8px 0 0; font-size: 13px; color: #333; }
.patent-pagination { display: flex; justify-content: center; gap: 8px; margin-top: 22px; }
.patent-pagination .page-btn { padding: 6px 12px; border: 1px solid #ddd; background: #fff; color: #333; cursor: pointer; border-radius: 4px; }
.patent-pagination .page-btn.active { background: #1e76b9; color: #fff; border-color: #1e76b9; }
.patent-pagination .page-btn:disabled { opacity: .5; cursor: not-allowed; }

.patent-section:last-child {
  margin-bottom: 60px;
}

.patent-title {
  font-size: 36px;
  font-weight: 700;
  color: #03499e;
  margin-bottom: 30px;
}

/* 专利网格布局 */
.patent-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px 25px;
  margin-bottom: 40px;
}

.patent-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: transparent;
  transition: all 0.3s ease;
}

.patent-item img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid #e0e0e0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  cursor: pointer;
}

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

.patent-item:hover img {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.patent-item p {
  margin-top: 15px;
  font-size: 14px;
  color: #333;
  text-align: center;
  line-height: 1.5;
  font-weight: 400;
}

/* 查看更多按钮 */
.more-button-container {
  text-align: center;
  margin: 50px 0 40px;
}

.more-button {
  padding: 12px 60px;
  font-size: 16px;
  font-weight: 400;
  color: #fff;
  background: #03499e;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  letter-spacing: 1px;
}

.more-button:hover {
  background: #02376e;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(3, 73, 158, 0.3);
}

/* 响应式适配 */
@media (max-width: 1024px) {
  .patent-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 25px 15px;
  }
}

@media (max-width: 768px) {
  .patent-title {
    font-size: 24px;
  }
  
  .patent-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px 10px;
  }
  
  .patent-item p {
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .patent-title {
    font-size: 20px;
  }
  
  .patent-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .more-button {
    padding: 10px 40px;
    font-size: 14px;
  }
}

/* 底部边距调整 */
.site-footer {
  margin-top: 0px !important;
}

/* 图片查看器样式 */
.image-viewer {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 9999;
  justify-content: center;
  align-items: center;
}

.image-viewer.active {
  display: flex;
}

.image-viewer-content {
  position: relative;
  max-width: 90%;
  max-height: 90%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.image-viewer-content img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border: 2px solid #fff;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.image-viewer-title {
  margin-top: 20px;
  padding: 10px 20px;
  font-size: 18px;
  color: #fff;
  background: rgba(0, 0, 0, 0.6);
  border-radius: 4px;
  text-align: center;
  max-width: 80%;
}

.image-viewer-close {
  position: fixed;
  top: 20px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 48px;
  cursor: pointer;
  line-height: 1;
  transition: transform 0.3s ease;
  z-index: 10000;
}

.image-viewer-close:hover {
  transform: scale(1.2);
}

/* 响应式适配 */
@media (max-width: 768px) {
  .image-viewer-content {
    max-width: 95%;
  }
  
  .image-viewer-content img {
    max-height: 70vh;
  }
  
  .image-viewer-title {
    font-size: 16px;
    padding: 8px 15px;
  }
  
  .image-viewer-close {
    top: 10px;
    right: 15px;
    font-size: 36px;
    width: 40px;
    height: 40px;
  }
}
html { scrollbar-gutter: stable both-edges; }
.patent-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; min-height: 460px; }
@media (max-width: 1024px) {
  .patent-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .patent-grid { grid-template-columns: 1fr; }
}
.patent-tabs { display: flex; gap: 12px; align-items: center; margin: 20px 0; }
@media (max-width: 600px) {
  .patent-tabs { flex-wrap: wrap; gap: 8px; }
}

/* Mobile: hide breadcrumb for English pages */
@media (max-width: 768px) {
  html[lang='en'] .breadcrumb { display: none !important; }
}