/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

/* 防止iOS输入框聚焦时页面缩放 */
input, select, textarea {
  font-size: 16px !important;
}

/* 最小点击区域 44px（Apple推荐） */
.btn, .nav-links a, .mobile-menu-btn {
  min-height: 44px;
}
@media (max-width: 1024px) {
  .hero-content {
    max-width: 100%;
    text-align: left;
    align-items: flex-start;
    margin-left: 0;
  }

  .hero h1 {
    white-space: normal;
    font-size: clamp(2rem, 5vw, 3.5rem);
  }

  .hero-description {
    margin: 0 0 2.5rem 0;
    white-space: normal;
  }

  .hero-buttons {
    justify-content: flex-start;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .contact-offices {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .footer-merged-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .support-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 1rem;
    gap: 0;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links li {
    padding: 0;
    border-bottom: 1px solid var(--border-light);
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  .nav-links a {
    padding: 0.75rem 1rem;
    width: 100%;
    justify-content: flex-start;
  }

  .nav-link-icon {
    width: 20px;
    height: 20px;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .nav-cta .nav-icon-link {
    display: none;
  }

  .language-switcher {
    position: static;
  }

  .language-dropdown {
    right: auto;
    left: 0;
  }

  .hero {
    min-height: auto;
    padding: 8.5rem 0 4rem;
  }

  .hero-carousel-controls {
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
  }

  .carousel-indicators {
    gap: 0.5rem;
    padding: 0.4rem 0.75rem;
  }

  .carousel-indicator {
    width: 6px;
    height: 6px;
  }

  .carousel-indicator.active {
    width: 20px;
  }


  .brief-intro {
    padding: 4rem 0;
  }

  .brief-intro-cta {
    flex-direction: column;
    align-items: center;
  }

  .hero-stats {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }

  .stat-number {
    font-size: 2rem;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .support-grid {
    grid-template-columns: 1fr;
  }

  .credibility-stats {
    gap: 2rem;
  }

  .stat-item {
    min-width: 120px;
  }

  .stat-number {
    font-size: 2rem;
  }

  .industries-grid {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 1.5rem;
  }

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

  .industry-icon svg {
    width: 30px;
    height: 30px;
  }

  .partners-logos-grid,
  .members-logos-grid {
    gap: 1.5rem;
  }

  .partner-logo-item,
  .member-logo-item {
    padding: 1rem 1.5rem;
    min-width: 120px;
    font-size: 0.95rem;
  }

  .cases-grid {
    grid-template-columns: 1fr;
  }

  .news-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form-wrapper {
    padding: 1.5rem;
  }

  .office-card {
    padding: 1.5rem;
  }

  .office-title {
    font-size: 1.1rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-merged-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-column .contact-info li {
    flex-wrap: wrap;
  }

  .whatsapp-chat-btn {
    width: 100%;
    justify-content: center;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .partners-logos {
    gap: 1.5rem;
  }

  .partner-logo {
    font-size: 1.2rem;
  }

  .page-header {
    padding: 8.5rem 0 3rem;
    min-height: 50vh;
  }

  .page-header h1 {
    font-size: clamp(1.5rem, 5vw, 2rem);
    white-space: normal;
  }

  .service-detail-header {
    padding: 8.5rem 0 1.5rem;
  }

  .case-header,
  .article-header {
    padding: 8.5rem 0 1rem;
  }

  .service-detail-content {
    padding: 3rem 0 4rem;
  }

  .service-section h2 {
    font-size: 1.2rem;
  }

  .service-modes-list,
  .service-value-list {
    gap: 0.5rem;
  }

  .service-modes-list li,
  .service-value-list li {
    font-size: 0.9rem;
    padding: 0.4rem 0.75rem;
  }

  .service-tab-content-large > div {
    padding: 1.5rem;
  }

  .service-tab-content-large img {
    margin-top: 1.5rem;
  }

  .service-why-list li {
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    padding-bottom: 1.25rem;
  }

  .about-block .about-intro,
  .about-block .about-mission {
    margin-bottom: 3rem;
  }

  .about-block-title {
    font-size: 1.2rem;
  }

  .about-value-row {
    padding: 1rem 0;
  }

  .about-value-name {
    font-size: 1rem;
  }

  .about-portfolio-list {
    flex-direction: column;
    gap: 0.5rem;
  }

  .about-portfolio-list a {
    display: block;
    text-align: center;
  }

  .track-section {
    padding: 1.5rem;
  }

  .track-section .section-header h2 {
    font-size: 1.3rem;
  }

  .tutorial-placeholder {
    padding: 2rem 1.5rem;
  }

  .video-play-button {
    width: 60px;
    height: 60px;
  }

  .video-play-button svg {
    width: 24px;
    height: 24px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .destinations-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cases-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }

  .case-image,
  .news-image {
    height: 160px;
  }
}