/* ============================================
   昌都市元泰建筑工程公司官网 - 响应式样式
   ============================================ */

/* 中大型屏幕 (≤ 1280px) */
@media (max-width: 1280px) {
  .navbar-container {
    padding: var(--spacing-sm) var(--spacing-lg);
  }

  .home-hero .container {
    gap: var(--spacing-3xl);
  }

  .service-showcase,
  .partner-showcase {
    gap: var(--spacing-2xl);
  }
}

/* 平板与小型桌面 (≤ 1023px) */
@media (max-width: 1023px) {
  body {
    padding-top: 78px;
  }

  .navbar-actions {
    display: none;
  }

  .home-hero {
    padding: var(--spacing-3xl) 0;
  }

  .home-hero .container {
    grid-template-columns: 1fr;
  }

  .home-hero-media {
    order: -1;
  }

  .media-primary img {
    height: 320px;
  }

  .service-showcase,
  .partner-showcase {
    grid-template-columns: 1fr;
  }

  .cta-banner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .cta-actions {
    align-items: center;
  }

  .page-layout.with-sidebar {
    grid-template-columns: 1fr;
  }

  .page-sidebar {
    position: static;
    flex-direction: row;
    gap: var(--spacing-md);
    overflow-x: auto;
  }

  .page-sidebar .sidebar-card {
    min-width: 260px;
  }

  .page-main {
    padding: var(--spacing-2xl);
  }

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

/* 手机端 (≤ 767px) */
@media (max-width: 767px) {
  body {
    padding-top: 72px;
  }

  section {
    padding: var(--spacing-2xl) 0;
  }

  .navbar-container {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background-color: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    max-height: calc(100vh - 72px);
    overflow-y: auto;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-12px);
    transition: opacity var(--transition-base), transform var(--transition-base);
  }

  .nav-menu.active {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-menu .nav-item {
    width: 100%;
  }

  .nav-menu .nav-link {
    width: 100%;
    border-radius: var(--border-radius-md);
  }

  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
    width: 100%;
  }

  .dropdown-menu.active {
    max-height: 480px;
  }

  .dropdown-menu a {
    padding: var(--spacing-sm) var(--spacing-lg) var(--spacing-sm) var(--spacing-2xl);
  }

  .hamburger {
    display: flex;
  }

  .home-hero .container {
    gap: var(--spacing-2xl);
  }

  .hero-text h1 {
    font-size: 38px;
  }

  .hero-text p {
    font-size: var(--font-size-base);
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-actions .contact-meta {
    align-items: flex-start;
  }

  .media-primary img {
    height: 260px;
  }

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

  .quick-stats {
    grid-template-columns: 1fr;
  }

  .service-cards,
  .project-gallery,
  .certifications,
  .value-highlight,
  .news-grid,
  .partner-logos {
    grid-template-columns: 1fr;
  }

  .project-card img,
  .news-item-card img {
    height: 200px;
  }

  .page-main {
    padding: var(--spacing-xl);
  }

  .cta-banner {
    padding: var(--spacing-2xl);
  }

  .cta-actions {
    width: 100%;
  }

  .cta-actions .btn {
    width: 100%;
  }

  .footer-content {
    padding: 0 var(--spacing-md);
  }

  .footer-bottom {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }
}

/* 超小屏幕 (≤ 479px) */
@media (max-width: 479px) {
  .hero-text h1 {
    font-size: 32px;
  }

  .media-gallery {
    grid-template-columns: 1fr;
  }

  .hero-meta {
    grid-template-columns: 1fr;
  }

  .home-hero {
    padding: var(--spacing-xl) 0 var(--spacing-2xl);
  }

  .stat-card {
    padding: var(--spacing-lg);
  }

  .btn {
    width: 100%;
  }
}