/* ========================================
   移动端终极优化 - 2025顶尖设计标准
   ======================================== */

@media (max-width: 768px) {
  
  /* ===== 1. 全局字体和缩放优化 ===== */
  html {
    font-size: 16px !important;
    -webkit-text-size-adjust: 100% !important;
    -ms-text-size-adjust: 100% !important;
    text-size-adjust: 100% !important;
  }
  
  body {
    font-size: 1rem !important;
    line-height: 1.6 !important;
    -webkit-font-smoothing: antialiased !important;
    -moz-osx-font-smoothing: grayscale !important;
    text-rendering: optimizeLegibility !important;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif !important;
  }
  
  /* ===== 2. 禁止用户缩放（可选，保持体验一致） ===== */
  * {
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }
  
  /* ===== 3. 所有文字清晰可见 ===== */
  p, span, a, li, div, h1, h2, h3, h4, h5, h6, label, input, textarea, button {
    -webkit-font-smoothing: antialiased !important;
    -moz-osx-font-smoothing: grayscale !important;
  }
  
  /* 最小字体大小保证 */
  p, span, a, li {
    font-size: max(0.875rem, 14px) !important;
    line-height: 1.5 !important;
  }
  
  /* 标题字体 */
  h1 { font-size: 1.75rem !important; font-weight: 700 !important; }
  h2 { font-size: 1.5rem !important; font-weight: 600 !important; }
  h3 { font-size: 1.25rem !important; font-weight: 600 !important; }
  
  /* ===== 4. 侧边栏优化 ===== */
  .sidebar {
    width: 85vw !important;
    max-width: 320px !important;
    padding: 1.5rem !important;
    background: rgba(255, 255, 255, 0.98) !important;
    backdrop-filter: blur(20px) !important;
    -webkit-backdrop-filter: blur(20px) !important;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.15) !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
  }
  
  /* 侧边栏导航链接 */
  .sidebar .nav-section ul li a {
    display: block !important;
    padding: 0.875rem 1rem !important;
    font-size: 1rem !important;
    font-weight: 500 !important;
    color: #1f2937 !important;
    border-radius: 8px !important;
    transition: background 0.2s ease !important;
  }
  
  .sidebar .nav-section ul li a:hover,
  .sidebar .nav-section ul li a:active {
    background: rgba(59, 130, 246, 0.1) !important;
    color: #2563eb !important;
  }
  
  /* 侧边栏标签 */
  .sidebar .nav-label {
    font-size: 0.875rem !important;
    font-weight: 600 !important;
    color: #6b7280 !important;
    text-transform: uppercase !important;
    letter-spacing: 0.05em !important;
    margin-bottom: 0.5rem !important;
    padding: 0 1rem !important;
  }
  
  /* ===== 5. 底部导航优化 ===== */
  .mobile-bottom-nav {
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    height: 64px !important;
    background: rgba(255, 255, 255, 0.98) !important;
    backdrop-filter: blur(20px) !important;
    -webkit-backdrop-filter: blur(20px) !important;
    box-shadow: 0 -2px 20px rgba(0, 0, 0, 0.1) !important;
    display: flex !important;
    justify-content: space-around !important;
    align-items: center !important;
    padding: 0 !important;
    padding-bottom: env(safe-area-inset-bottom, 0) !important;
    z-index: 9999 !important;
  }
  
  .mobile-bottom-nav .nav-item {
    flex: 1 !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 0.5rem !important;
    font-size: 0.75rem !important;
    font-weight: 500 !important;
    color: #6b7280 !important;
    text-decoration: none !important;
    transition: color 0.2s ease !important;
  }
  
  .mobile-bottom-nav .nav-item.active,
  .mobile-bottom-nav .nav-item:active {
    color: #2563eb !important;
  }
  
  .mobile-bottom-nav .nav-item svg {
    width: 24px !important;
    height: 24px !important;
    margin-bottom: 4px !important;
  }
  
  /* ===== 6. 主内容区域 ===== */
  .main {
    padding-bottom: 80px !important; /* 为底部导航留空间 */
    margin: 0 !important;
    padding-left: 0 !important;
    padding-right: 0 !important;
  }
  
  /* ===== 7. 卡片和内容块 ===== */
  .timeline-section,
  .datacenter-section,
  .cases-section,
  .news-section,
  .honors-section,
  .faq-section {
    padding: 1.5rem 1rem !important;
    margin: 0 !important;
  }
  
  .timeline-section header,
  section header {
    text-align: center !important;
    margin-bottom: 1.5rem !important;
  }
  
  .eyebrow {
    font-size: 0.875rem !important;
    font-weight: 600 !important;
    color: #2563eb !important;
    margin-bottom: 0.5rem !important;
  }
  
  /* ===== 8. 数据中心状态栏字体优化 ===== */
  .datacenter-section .dc-container > div:first-child {
    flex-direction: column !important;
    gap: 0.75rem !important;
    padding: 1rem !important;
    background: rgba(255, 255, 255, 0.95) !important;
    border-radius: 12px !important;
    margin-bottom: 1rem !important;
  }
  
  .datacenter-section span[style*="font-size"] {
    font-size: 0.9375rem !important;
    font-weight: 500 !important;
    color: #374151 !important;
  }
  
  .dc-status-text {
    font-size: 1rem !important;
    font-weight: 600 !important;
    color: #1f2937 !important;
  }
  
  .dc-timestamp,
  .dc-server-text,
  .dc-center-text {
    font-size: 0.9375rem !important;
    font-weight: 500 !important;
    color: #4b5563 !important;
  }
  
  /* ===== 9. 触摸目标优化（至少44x44px） ===== */
  button,
  a,
  .nav-item,
  input[type="button"],
  input[type="submit"] {
    min-height: 44px !important;
    min-width: 44px !important;
  }
  
  /* ===== 10. 轮播图优化 ===== */
  .hero-section,
  .about-hero {
    border-radius: 0 !important;
    margin: 0 !important;
  }
  
  .hero-slides {
    border-radius: 0 !important;
  }
  
  /* ===== 11. 网格布局移动端适配 ===== */
  .timeline-grid,
  .dc-cards,
  .cases-grid,
  .news-grid {
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
  }
  
  /* ===== 12. 社交媒体图标 ===== */
  .social-links {
    display: flex !important;
    gap: 0.75rem !important;
    flex-wrap: wrap !important;
  }
  
  .social-links a {
    width: 44px !important;
    height: 44px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    background: rgba(59, 130, 246, 0.1) !important;
    border-radius: 12px !important;
    transition: all 0.2s ease !important;
  }
  
  .social-links a:active {
    transform: scale(0.95) !important;
    background: rgba(59, 130, 246, 0.2) !important;
  }
  
  .social-links a svg {
    width: 20px !important;
    height: 20px !important;
    color: #2563eb !important;
  }
  
  /* ===== 13. 滚动条美化 ===== */
  ::-webkit-scrollbar {
    width: 4px !important;
    height: 4px !important;
  }
  
  ::-webkit-scrollbar-track {
    background: transparent !important;
  }
  
  ::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2) !important;
    border-radius: 4px !important;
  }
  
  /* ===== 14. 安全区域适配（iPhone X+） ===== */
  body {
    padding-top: env(safe-area-inset-top, 0) !important;
    padding-left: env(safe-area-inset-left, 0) !important;
    padding-right: env(safe-area-inset-right, 0) !important;
  }
  
  /* ===== 15. 动画性能优化 ===== */
  .sidebar,
  .mobile-bottom-nav,
  .hero-slide {
    will-change: transform, opacity !important;
    transform: translateZ(0) !important;
    backface-visibility: hidden !important;
  }
}

/* ===== 平板适配（769px - 1024px）===== */
@media (min-width: 769px) and (max-width: 1024px) {
  /* 平板使用桌面布局 */
  .sidebar {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    transform: translateX(0) !important;
    position: fixed !important;
    left: 1rem !important;
    top: 1rem !important;
    width: 200px !important;
  }
  
  .main {
    margin-left: 220px !important;
  }
  
  .mobile-bottom-nav,
  .sidebar-toggle {
    display: none !important;
  }
}