/* 响应式设计 */
@media (max-width: 810px) {
    /* 通用样式调整 */
    .container {
      width: 95%;
      padding: 0 10px;
    }
    
    .section-title {
      font-size: 22px;
      margin-bottom: 30px;
    }
    
    /* 导航栏调整 */
    .navbar {
      height: 60px;
    }
    
    .logo {
      font-size: 16px;
      margin-left: 0;
    }
    
    .nav-center {
      display: none;
    }
    
    .nav-right {
      margin-right: 0;
    }
    
    .language-switcher-btn {
      width: 60px;
      padding: 4px 8px;
      font-size: 12px;
      margin-right: 5px;
    }
    
    /* 英雄轮播区域 */
    .hero-carousel-container {
      position: relative;
      height: 100vh;
    }
    
    .carousel-section {
      height: 100vh;
    }
    
    .carousel-content {
      bottom: 15%;
      left: 5%;
      max-width: 90%;
    }
    
    .carousel-title {
      font-size: 1.5rem;
      margin-bottom: 0.5rem;
    }
    
    .carousel-description {
      font-size: 0.9rem;
    }
    
    .logo-section {
      padding: 120px 0;
      height: 60vh;
    }
    
    .logo-display img {
      max-width: 200px;
    }
    
    .logo-text {
      font-size: 24px;
      margin-top: 15px;
    }
    
    .carousel-controls {
      bottom: 20px;
    }
    
    .hero-placeholder {
      height: 40vh;
    }
    
    /* 业务展示部分 */
    .business-showcase-section {
      padding: 40px 0;
    }
    
    .business-module {
      height: 350px;
      margin-bottom: 40px;
    }
    
    .business-content {
      padding: 0 20px;
    }
    
    .business-title {
      font-size: 24px;
      margin-bottom: 15px;
    }
    
    .business-description {
      font-size: 14px;
      margin-bottom: 20px;
    }
    
    .service-links {
      gap: 8px;
      margin-bottom: 25px;
    }
    
    .service-link {
      padding: 6px 12px;
      font-size: 14px;
      flex: 0 0 calc(50% - 4px);
    }
    
    .detail-btn {
      padding: 10px 20px;
      font-size: 14px;
    }
    
    /* 首页矩形展示部分 */
    .hero-section {
      padding: 50px 0;
    }
    
    .rectangles-container {
      flex-direction: column;
      align-items: center;
      gap: 20px;
      padding: 10px;
    }
    
    .rectangle {
      width: 100%;
      max-width: 400px;
      height: 400px;
      margin-bottom: 15px;
    }
    
    .rectangle-content h3 {
      font-size: 18px;
    }
    
    .rectangle-content p {
      font-size: 13px;
      opacity: 1;
      transform: translateY(0);
    }
    
    /* 内容展示部分 */
    .content-section {
      padding: 40px 0;
    }
    
    .company-intro {
      padding: 20px;
      margin: 30px 0;
    }
    
    .company-intro p {
      font-size: 1rem;
      padding-left: 15px;
    }
    
    .company-intro p::before {
      font-size: 1.2rem;
    }
    
    /* 新闻动态部分 */
    .news-section {
      padding: 40px 0;
    }
    
    .news-container {
      flex-direction: column;
    }
    
    .news-nav {
      flex-direction: row;
      justify-content: center;
      margin-bottom: 20px;
    }
    
    .news-nav-option {
      padding: 10px 15px;
      font-size: 14px;
      margin: 0 5px;
    }
    
    .news-content {
      padding: 20px;
    }
    
    .news-header {
      flex-direction: column;
      align-items: flex-start;
      margin-bottom: 20px;
    }
    
    .news-tab {
      margin-bottom: 10px;
      font-size: 18px;
    }
    
    .more-news {
      align-self: flex-end;
    }
    
    .news-grid {
      gap: 15px;
    }
    
    .news-card {
      width: 100%;
      margin-bottom: 20px;
    }
    
    .news-card .news-image {
      height: 200px;
    }
    
    .news-info h3 {
      font-size: 16px;
    }
    
    .news-info p {
      font-size: 13px;
    }
    
    .news-date {
      font-size: 12px;
    }
    
    /* 页脚部分 */
    footer {
      padding: 30px 0 15px;
    }
    
    .footer-content {
      flex-direction: column;
      margin-bottom: 20px;
    }
    
    .footer-info,
    .footer-links {
      width: 100%;
      margin-bottom: 20px;
    }
    
    .footer-info p {
      font-size: 14px;
    }
    
    .footer-links ul {
      flex-direction: column;
    }
    
    .footer-links li {
      width: 100%;
      margin-bottom: 8px;
    }
    
    .copyright {
      padding-top: 15px;
      font-size: 12px;
    }
    
    /* 联系小部件 */
    .contact-widget {
      bottom: 20px;
      right: 20px;
    }
    
    .contact-button {
      width: 50px;
      height: 50px;
    }
    
    .contact-icon {
      width: 60px;
      height: 60px;
    }
    
    .contact-text {
      font-size: 12px;
    }
    
    .contact-panel {
      right: 60px;
      width: 160px;
      padding: 15px;
    }
    
    .contact-option {
      padding: 10px;
      margin-bottom: 8px;
    }
    
    .contact-title {
      font-size: 12px;
    }
    
    .contact-phone {
      font-size: 12px;
    }
    
    /* 下拉菜单在移动端隐藏 */
    .has-dropdown .dropdown-menu {
      display: none !important;
    }
    
    /* 内容展示部分的子公司布局调整 */
    .subsidiaries-layout {
      flex-direction: column;
    }
    
    .subsidiary-rect {
      width: 100%;
      height: 250px;
    }
    
    .subsidiary-rect.vertical {
      width: 100%;
      height: 250px;
    }
    
    .left-column,
    .right-column {
      width: 100%;
    }
    
    .left-column {
      gap: 15px;
    }
  }
  
  /* ===== 超小屏幕适配（宽度 < 480px） ===== */
  @media (max-width: 480px) {
    .business-module {
      height: 400px;
    }
    
    .service-link {
      flex: 0 0 100%; /* 单列布局 */
    }
    
    .rectangle {
      height: 350px;
    }
    
    .logo-display img {
      max-width: 150px;
    }
    
    .logo-text {
      font-size: 20px;
    }
    
    .carousel-title {
      font-size: 1.2rem;
    }
    
    .carousel-description {
      font-size: 0.8rem;
    }
  }