/* ==========================================================================
   徐州一点云科技有限公司西安分公司 - 全响应式适配样式表
   涵盖断点: 1440px, 1200px, 992px, 768px, 430px, 390px, 360px
   ========================================================================== */

/* 1440px 桌面大屏微调 */
@media (max-width: 1440px) {
  .container {
    max-width: 1200px;
  }
}

/* 1200px 标准桌面屏 */
@media (max-width: 1200px) {
  .container {
    max-width: 960px;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .grid-3 {
    gap: 24px;
  }
  
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 32px;
  }
}

/* 992px 平板电脑 / 窄屏 */
@media (max-width: 992px) {
  .container {
    max-width: 720px;
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
    margin: 0 auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-visual {
    width: 100%;
  }
  
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

/* 768px 移动端 / 平板竖屏 */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .section-subtitle {
    font-size: 1rem;
  }

  /* 移动端导航菜单折叠 */
  .mobile-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
    z-index: 999;
  }

  .nav-menu.active {
    transform: translateY(0);
  }

  .grid-3, .grid-2, .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: 2rem;
  }

  .page-banner-title {
    font-size: 1.8rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 12px;
  }
}

/* 430px 大屏智能手机 (iPhone Plus/Max, High-end Android) */
@media (max-width: 430px) {
  .hero-title {
    font-size: 1.75rem;
  }

  .btn {
    width: 100%;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .stat-number {
    font-size: 2.25rem;
  }
}

/* 390px 标准移动端 (iPhone 12/13/14, Galaxy S系列) */
@media (max-width: 390px) {
  .tag-industry {
    font-size: 0.78rem;
    padding: 4px 12px;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .service-card {
    padding: 24px 20px;
  }
}

/* 360px 紧凑移动端 (Android Entry Level, Compact Screens) */
@media (max-width: 360px) {
  .container {
    padding: 0 12px;
  }

  .brand-logo span {
    font-size: 1rem;
  }

  .hero-title {
    font-size: 1.5rem;
  }

  .hero-card-glow {
    padding: 20px 16px;
  }
}