/* ==========================================================================
   ez-to-ai 官网设计系统 - 响应式断点与无障碍适配 (Responsive CSS)
   ========================================================================== */

/* 大屏与笔记本优化 (<= 1200px) */
@media (max-width: 1200px) {
  .feature-triad-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

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

  .scene {
    padding: calc(var(--header-height) + 16px) 32px 50px;
  }
}

/* 平板端适配 (<= 992px) */
@media (max-width: 992px) {
  .dynamic-island-navbar {
    padding: 6px 10px;
    gap: 8px;
  }

  .nav-links {
    display: none; /* 移动折叠 */
  }

  .nav-mobile-toggle {
    display: flex;
  }

  .feature-triad-grid {
    grid-template-columns: 1fr;
    max-height: 55vh;
    overflow-y: auto;
    padding-right: 6px;
  }

  .demand-download-grid,
  .demand-card-wrapper {
    max-width: 100% !important;
    padding: 24px 20px !important;
    gap: 16px !important;
    max-height: 60vh;
    overflow-y: auto;
  }

  .island-simulator-stage {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .tutorial-top-cmd-bar {
    max-width: 100%;
    overflow-x: auto;
    border-radius: 12px;
    padding: 6px 10px;
    scrollbar-width: thin;
  }

  .tutorial-stepper-layout {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .tutorial-step-list {
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 8px;
  }

  .tutorial-step-item {
    white-space: nowrap;
    padding: 10px 14px;
  }

  .calculator-card-wrapper {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 20px;
    max-height: 60vh;
    overflow-y: auto;
  }

  .investor-pitch-grid, .sponsor-tier-grid {
    grid-template-columns: 1fr;
    max-height: 55vh;
    overflow-y: auto;
  }

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

  .form-full-width {
    grid-column: span 1;
  }

  .scrolly-nav-dots {
    right: 12px;
    padding: 8px 4px;
    gap: 10px;
  }

  .scrolly-chapter-badge {
    left: 12px;
    bottom: 16px;
    padding: 6px 12px;
    font-size: 0.75rem;
  }

  .scrolly-hint-container {
    display: none; /* 移动端精简空间 */
  }

  .scrolly-step-arrows {
    right: 12px;
    bottom: 16px;
  }
}

/* 手机端适配 (<= 640px) */
@media (max-width: 640px) {
  :root {
    --header-height: 60px;
  }

  .header-island-wrapper {
    top: 10px;
    padding: 0 12px;
  }

  .scene {
    padding: calc(var(--header-height) + 12px) 16px 40px;
    gap: 16px;
  }

  .hero-glass-title {
    font-size: 2.4rem;
  }

  .hero-tagline-cn {
    font-size: 1.15rem;
  }

  .pricing-matrix-grid {
    grid-template-columns: 1fr;
    max-height: 55vh;
    overflow-y: auto;
  }

  .software-app-grid {
    gap: 14px;
  }

  .app-icon-squircle {
    width: 54px;
    height: 54px;
    border-radius: 15px;
  }

  .app-icon-squircle svg {
    width: 26px;
    height: 26px;
  }
}

/* 减弱动画模式 (Prefers-reduced-motion) */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .scene {
    transform: none !important;
    filter: none !important;
  }
}