/* 响应式样式 - AI SaaS 生态系统 */

/* 大型桌面设备 */
@media (max-width: 1440px) {
  .container {
    max-width: 1100px;
  }
}

/* 平板设备 */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .hero-visual {
    order: -1;
    margin-top: var(--spacing-lg);
  }
  
  .hero-title {
    font-size: 2.75rem;
  }
  
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .service-level {
    grid-template-columns: 1fr;
  }
  
  .service-level:nth-child(even) {
    grid-template-columns: 1fr;
  }
  
  .service-level:nth-child(even) .service-level-info,
  .service-level:nth-child(even) .service-level-visual {
    order: initial;
  }
  
  .ecosystem-diagram {
    gap: var(--spacing-lg);
  }
  
  .ecosystem-node.platform .ecosystem-node-icon {
    width: 100px;
    height: 100px;
    font-size: 2.5rem;
  }
  
  .ecosystem-node-icon {
    width: 70px;
    height: 70px;
    font-size: 1.75rem;
  }
}

/* 手机设备 */
@media (max-width: 768px) {
  /* 导航栏 */
  .navbar-nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-xl);
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: 999;
  }
  
  .navbar-nav.active {
    transform: translateY(0);
    opacity: 1;
  }
  
  .navbar-nav a {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 1.125rem;
  }
  
  .navbar-nav a:last-child {
    border-bottom: none;
  }
  
  .navbar-actions .btn-secondary {
    display: none;
  }
  
  .navbar-actions .btn-primary {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
  }
  
  .navbar-toggle {
    display: block;
    color: var(--text-primary);
  }
  
  /* Hero区域 */
  .hero {
    padding: calc(80px + var(--spacing-xl)) 0 var(--spacing-xl);
    text-align: center;
  }
  
  .hero-title {
    font-size: 2.25rem;
    line-height: 1.2;
  }
  
  .hero-subtitle {
    font-size: 1rem;
    text-align: center;
  }
  
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .hero-actions .btn {
    width: 100%;
    max-width: 280px;
  }
  
  .hero-stats {
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
  }
  
  .hero-stat {
    text-align: center;
  }
  
  .hero-card {
    padding: var(--spacing-md);
  }
  
  .hero-card-metrics {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }
  
  /* 章节 */
  .section {
    padding: var(--spacing-xl) 0;
  }
  
  .section-header {
    margin-bottom: var(--spacing-lg);
  }
  
  .section-title {
    font-size: 1.875rem;
  }
  
  .section-subtitle {
    font-size: 1rem;
  }
  
  /* 卡片网格 */
  .card-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .card {
    padding: var(--spacing-md);
  }
  
  .card-icon {
    width: 48px;
    height: 48px;
    font-size: 1.25rem;
  }
  
  .cases-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .case-card-header {
    height: 120px;
    font-size: 3rem;
  }
  
  .case-card-body {
    padding: var(--spacing-md);
  }
  
  /* 服务层次 */
  .service-level-features {
    gap: 0.5rem;
  }
  
  .service-level-feature {
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
  }
  
  /* Footer */
  .footer {
    padding: var(--spacing-xl) 0 var(--spacing-md);
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
  
  /* 生态系统 */
  .ecosystem-diagram {
    flex-direction: column;
  }
  
  .ecosystem-arrow {
    transform: rotate(90deg);
    margin: var(--spacing-sm) 0;
  }
  
  .ecosystem-node.platform .ecosystem-node-icon {
    width: 80px;
    height: 80px;
    font-size: 2rem;
  }
  
  .ecosystem-node-icon {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
  }
  
  /* 表单 */
  .form-group {
    margin-bottom: var(--spacing-md);
  }
  
  /* 按钮 */
  .btn {
    padding: 0.75rem 1.25rem;
    font-size: 0.875rem;
  }
}

/* 小屏手机 */
@media (max-width: 480px) {
  /* Hero区域 */
  .hero-title {
    font-size: 1.875rem;
  }
  
  .hero-subtitle {
    font-size: 0.875rem;
  }
  
  .hero-stat-number {
    font-size: 1.5rem;
  }
  
  .hero-stat-label {
    font-size: 0.75rem;
  }
  
  /* 章节 */
  .section-title {
    font-size: 1.5rem;
  }
  
  .section-subtitle {
    font-size: 0.875rem;
  }
  
  /* 卡片 */
  .card-title {
    font-size: 1.125rem;
  }
  
  .card-description {
    font-size: 0.875rem;
  }
  
  /* 案例卡片 */
  .case-card-header {
    height: 100px;
    font-size: 2.5rem;
  }
  
  .case-card-title {
    font-size: 1.125rem;
  }
  
  .case-card-description {
    font-size: 0.75rem;
  }
  
  /* 页脚 */
  .footer-description {
    font-size: 0.875rem;
  }
  
  .footer-links a {
    font-size: 0.75rem;
  }
  
  /* 按钮 */
  .btn {
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
  }
  
  /* 导航栏 */
  .navbar-logo span {
    font-size: 1rem;
  }
  
  .navbar-logo-icon {
    width: 32px;
    height: 32px;
  }
}

/* 极窄屏幕 */
@media (max-width: 320px) {
  .hero-title {
    font-size: 1.5rem;
  }
  
  .hero-stats {
    gap: var(--spacing-sm);
  }
  
  .hero-stat {
    flex: 1;
    min-width: 80px;
  }
  
  .card-icon {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
}

/* 横屏手机 */
@media (max-width: 768px) and (orientation: landscape) {
  .hero {
    padding: calc(70px + var(--spacing-lg)) 0 var(--spacing-lg);
  }
  
  .hero-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
  }
  
  .hero-visual {
    order: initial;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-stats {
    justify-content: flex-start;
  }
}

/* 打印样式 */
@media print {
  .navbar {
    display: none;
  }
  
  .hero {
    padding: var(--spacing-xl) 0;
  }
  
  .footer {
    display: none;
  }
  
  .btn {
    display: none;
  }
  
  * {
    color: black !important;
    background: white !important;
    box-shadow: none !important;
  }
}