/* ===== Modern Design System - Dark Tech Style ===== */
    :root {
      --hero-bg: #ffffff;
      --max-width: 1200px;
      --section-padding: 96px;
      --bg-primary: #ffffff;
      --bg-secondary: #f8fafc;
      --bg-tertiary: #f1f5f9;
      --bg-card: #ffffff;
      --text-primary: #0f172a;
      --text-secondary: #475569;
      --text-tertiary: #94a3b8;
      --border-color: #e2e8f0;
      --border-light: #f1f5f9;
      --accent: #3b82f6;
      --accent-hover: #60a5fa;
      --accent-light: #dbeafe;
      --accent-bg: #eff6ff;
      --success: #10b981;
      --warning: #f59e0b;
      --danger: #ef4444;
      --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
      --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
      --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
      --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --radius-xl: 16px;
      --radius-2xl: 24px;
      --transition: 0.2s ease;
      --header-height: 64px;
    }
    [data-theme="dark"] {
      --hero-bg: #0a0e1a;
      --bg-primary: #0a0e1a;
      --bg-secondary: #111827;
      --bg-tertiary: #1f2937;
      --bg-card: rgba(31, 41, 55, 0.5);
      --text-primary: #f9fafb;
      --text-secondary: #9ca3af;
      --text-tertiary: #6b7280;
      --border-color: rgba(75, 85, 99, 0.3);
      --border-light: rgba(75, 85, 99, 0.2);
      --accent: #3b82f6;
      --accent-hover: #60a5fa;
      --accent-light: rgba(59, 130, 246, 0.15);
      --accent-bg: rgba(59, 130, 246, 0.08);
      --success: #10b981;
      --warning: #f59e0b;
      --danger: #ef4444;
      --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -2px rgba(0,0,0,0.3);
      --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4), 0 4px 6px -4px rgba(0,0,0,0.3);
      --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.4), 0 8px 10px -6px rgba(0,0,0,0.3);
      --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);
    }

    /* ===== Reset & Base ===== */
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
      background: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      background-image: 
        radial-gradient(ellipse 800px 600px at 10% 20%, rgba(59, 130, 246, 0.08), transparent),
        radial-gradient(ellipse 600px 500px at 90% 80%, rgba(139, 92, 246, 0.06), transparent);
      background-attachment: fixed;
    }
    a { color: inherit; text-decoration: none; }

    /* ===== Navigation ===== */
    .nav {
      position: fixed; top: 0; left: 0; right: 0; z-index: 100;
      height: 64px;
      background: rgba(255, 255, 255, 0.8);
      backdrop-filter: saturate(180%) blur(20px);
      -webkit-backdrop-filter: saturate(180%) blur(20px);
      border-bottom: 1px solid rgba(59, 130, 246, 0.1);
      transition: all 0.3s ease;
    }
    [data-theme="dark"] .nav {
      background: rgba(10, 14, 26, 0.7);
      border-bottom: 1px solid rgba(59, 130, 246, 0.15);
    }
    .nav.scrolled {
      height: 56px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
      background: rgba(255, 255, 255, 0.95);
    }
    [data-theme="dark"] .nav.scrolled {
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
      background: rgba(10, 14, 26, 0.9);
    }
    .nav-inner {
      max-width: var(--max-width);
      margin: 0 auto;
      height: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 32px;
    }
    .nav-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-primary);
      position: relative;
    }
    .nav-logo::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      right: 0;
      height: 2px;
      background: linear-gradient(90deg, #3b82f6, #8b5cf6, #06b6d4);
      opacity: 0.6;
    }
    .nav-logo-icon {
      font-size: 1.4rem;
      filter: drop-shadow(0 0 8px rgba(59, 130, 246, 0.5));
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .nav-link {
      padding: 8px 16px;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-secondary);
      border-radius: 8px;
      transition: all 0.2s ease;
      position: relative;
    }
    .nav-link:hover {
      color: var(--text-primary);
      background: rgba(59, 130, 246, 0.1);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 4px;
      left: 50%;
      transform: translateX(-50%) scaleX(0);
      width: 20px;
      height: 2px;
      background: linear-gradient(90deg, #3b82f6, #8b5cf6);
      border-radius: 1px;
      transition: transform 0.3s ease;
    }
    .nav-link:hover::after {
      transform: translateX(-50%) scaleX(1);
    }
    .nav-cta {
      padding: 8px 20px;
      font-size: 0.9rem;
      font-weight: 600;
      background: linear-gradient(135deg, #3b82f6, #8b5cf6);
      color: #fff;
      border-radius: 8px;
      transition: all 0.2s ease;
      position: relative;
      overflow: hidden;
    }
    .nav-cta::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
      transition: left 0.5s ease;
    }
    .nav-cta:hover {
      transform: translateY(-1px);
      box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
    }
    .nav-cta:hover::before {
      left: 100%;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .theme-toggle, .lang-toggle {
      width: 36px;
      height: 36px;
      border: none;
      background: var(--bg-secondary);
      border-radius: 8px;
      cursor: pointer;
      font-size: 0.85rem;
      font-weight: 600;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s ease;
      color: var(--text-secondary);
    }
    .theme-toggle:hover, .lang-toggle:hover {
      background: var(--bg-tertiary);
      color: var(--text-primary);
    }
    .mobile-menu-btn {
      display: none;
      width: 36px;
      height: 36px;
      border: none;
      background: var(--bg-secondary);
      border-radius: 8px;
      cursor: pointer;
      font-size: 1.1rem;
      color: var(--text-secondary);
      align-items: center;
      justify-content: center;
    }
    .mobile-menu-overlay {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.5);
      z-index: 999;
      backdrop-filter: blur(4px);
    }
    .mobile-menu-overlay.active {
      display: block;
      animation: fadeIn 0.3s ease;
    }
    .mobile-menu-panel {
      position: absolute;
      top: 0;
      right: 0;
      width: 280px;
      height: 100%;
      background: var(--bg-primary);
      box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
      transform: translateX(100%);
      transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      display: flex;
      flex-direction: column;
    }
    .mobile-menu-overlay.active .mobile-menu-panel {
      transform: translateX(0);
    }
    .mobile-menu-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 20px 24px;
      border-bottom: 1px solid var(--border-color);
    }
    .mobile-menu-title {
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--text-primary);
    }
    .mobile-menu-logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--text-primary);
      text-decoration: none;
    }
    .mobile-menu-logo .nav-logo-icon {
      font-size: 1.3rem;
    }
    .mobile-menu-close {
      width: 32px;
      height: 32px;
      border: none;
      background: var(--bg-secondary);
      border-radius: 8px;
      cursor: pointer;
      font-size: 1rem;
      color: var(--text-secondary);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s ease;
    }
    .mobile-menu-close:hover {
      background: var(--bg-tertiary);
      color: var(--text-primary);
    }
    .mobile-menu-links {
      flex: 1;
      padding: 16px;
      display: flex;
      flex-direction: column;
      gap: 4px;
      overflow-y: auto;
    }
    .mobile-menu-link {
      display: block;
      padding: 14px 16px;
      color: var(--text-primary);
      text-decoration: none;
      font-size: 1rem;
      border-radius: 10px;
      transition: all 0.2s ease;
    }
    .mobile-menu-link:hover {
      background: var(--bg-secondary);
      color: var(--accent);
    }
    .mobile-menu-cta {
      background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
      color: #fff !important;
      text-align: center;
      font-weight: 600;
      margin-top: auto;
      margin-bottom: 16px;
    }
    .mobile-menu-cta:hover {
      background: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #0891b2 100%) !important;
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
    }
    .mobile-menu-actions {
      padding: 12px 16px;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      gap: 4px;
      margin-bottom: 16px;
    }
    .mobile-menu-action {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 16px;
      background: transparent;
      border: none;
      border-radius: 10px;
      cursor: pointer;
      font-size: 1rem;
      color: var(--text-primary);
      text-align: left;
      width: 100%;
      transition: all 0.2s ease;
    }
    .mobile-menu-action:hover {
      background: var(--bg-secondary);
    }
    .action-icon {
      font-size: 1.1rem;
    }
    .action-text {
      flex: 1;
    }
    .action-value {
      font-size: 0.85rem;
      color: var(--text-secondary);
      font-weight: 600;
    }

    /* ===== Hero Section - Tech Style ===== */
    .hero {
      position: relative;
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 120px 24px 80px;
      background: var(--hero-bg);
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background:
        radial-gradient(ellipse 900px 700px at 15% 25%, rgba(59, 130, 246, 0.08), transparent),
        radial-gradient(ellipse 700px 600px at 85% 75%, rgba(139, 92, 246, 0.06), transparent),
        radial-gradient(ellipse 600px 500px at 50% 50%, rgba(6, 182, 212, 0.05), transparent);
      animation: heroGlow 12s ease-in-out infinite;
    }
    @keyframes heroGlow {
      0%, 100% { 
        background:
          radial-gradient(ellipse 900px 700px at 15% 25%, rgba(59, 130, 246, 0.08), transparent),
          radial-gradient(ellipse 700px 600px at 85% 75%, rgba(139, 92, 246, 0.06), transparent),
          radial-gradient(ellipse 600px 500px at 50% 50%, rgba(6, 182, 212, 0.05), transparent);
      }
      33% {
        background:
          radial-gradient(ellipse 800px 600px at 25% 35%, rgba(59, 130, 246, 0.06), transparent),
          radial-gradient(ellipse 800px 700px at 75% 65%, rgba(139, 92, 246, 0.08), transparent),
          radial-gradient(ellipse 500px 400px at 65% 35%, rgba(6, 182, 212, 0.06), transparent);
      }
      66% {
        background:
          radial-gradient(ellipse 700px 600px at 35% 65%, rgba(59, 130, 246, 0.05), transparent),
          radial-gradient(ellipse 600px 500px at 65% 35%, rgba(139, 92, 246, 0.05), transparent),
          radial-gradient(ellipse 700px 600px at 50% 70%, rgba(6, 182, 212, 0.08), transparent);
      }
    }
    .hero-grid {
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
      background-size: 40px 40px;
      mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
      -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
    }
    .hero-lines {
      position: absolute;
      inset: 0;
      overflow: hidden;
      pointer-events: none;
      opacity: 0.5;
    }
    .hero-line {
      position: absolute;
      width: 1px;
      height: 100px;
      background: linear-gradient(180deg, transparent, rgba(59, 130, 246, 0.15), transparent);
      animation: lineFloat 8s ease-in-out infinite;
    }
    .hero-line:nth-child(1) { left: 10%; animation-delay: 0s; }
    .hero-line:nth-child(2) { left: 30%; animation-delay: 2s; height: 150px; }
    .hero-line:nth-child(3) { left: 50%; animation-delay: 4s; height: 80px; }
    .hero-line:nth-child(4) { left: 70%; animation-delay: 1s; height: 120px; }
    .hero-line:nth-child(5) { left: 90%; animation-delay: 3s; height: 100px; }
    @keyframes lineFloat {
      0%, 100% { transform: translateY(-100%); opacity: 0; }
      50% { transform: translateY(100vh); opacity: 1; }
    }
    .hero-inner {
      position: relative;
      z-index: 1;
      max-width: 900px;
      margin: 0 auto;
      text-align: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 20px;
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 500;
      background: rgba(59, 130, 246, 0.1);
      color: #60a5fa;
      border: 1px solid rgba(59, 130, 246, 0.3);
      margin-bottom: 32px;
      animation: fadeInUp 0.4s ease forwards;
      backdrop-filter: blur(10px);
      box-shadow: 0 0 20px rgba(59, 130, 246, 0.1);
    }
    .hero-badge .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      animation: pulse 2s ease-in-out infinite;
      box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
    }
    .hero h1 {
      font-size: clamp(2.5rem, 6vw, 4.5rem);
      font-weight: 800;
      line-height: 1.1;
      color: var(--text-primary);
      margin-bottom: 24px;
      letter-spacing: -0.02em;
      animation: fadeInUp 0.4s ease 0.05s forwards;
      opacity: 0;
    }
    .hero h1 .gradient {
      background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 30%, #06b6d4 70%, #10b981 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      background-size: 200% 200%;
      animation: gradientShift 5s ease infinite;
    }
    @keyframes gradientShift {
      0%, 100% { background-position: 0% 50%; }
      50% { background-position: 100% 50%; }
    }
    .hero-desc {
      font-size: clamp(1rem, 2vw, 1.2rem);
      color: var(--text-secondary);
      max-width: 640px;
      margin: 0 auto 48px;
      line-height: 1.8;
      animation: fadeInUp 0.4s ease 0.1s forwards;
      opacity: 0;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
      animation: fadeInUp 0.4s ease 0.15s forwards;
      opacity: 0;
    }
    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 16px 36px;
      font-size: 1rem;
      font-weight: 600;
      background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
      background-size: 200% 200%;
      color: #fff;
      border: none;
      border-radius: 12px;
      cursor: pointer;
      transition: all 0.3s ease;
      box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
      position: relative;
      overflow: hidden;
    }
    .btn-primary::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
      transition: left 0.6s ease;
    }
    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 30px rgba(59, 130, 246, 0.5);
      background-position: 100% 50%;
    }
    .btn-primary:hover::before {
      left: 100%;
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 16px 36px;
      font-size: 1rem;
      font-weight: 600;
      background: var(--bg-secondary);
      color: var(--text-primary);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      cursor: pointer;
      backdrop-filter: blur(10px);
      transition: all 0.3s ease;
    }
    .btn-secondary:hover {
      background: var(--bg-tertiary);
      border-color: var(--accent);
      box-shadow: 0 0 20px rgba(59, 130, 246, 0.2);
    }

    /* Hero Stats */
    .hero-stats {
      display: flex;
      justify-content: center;
      gap: 64px;
      margin-top: 80px;
      animation: fadeInUp 0.4s ease 0.2s forwards;
      opacity: 0;
    }
    .hero-stat {
      text-align: center;
      position: relative;
    }
    .hero-stat::after {
      content: '';
      position: absolute;
      right: -32px;
      top: 50%;
      transform: translateY(-50%);
      width: 1px;
      height: 40px;
      background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    }
    .hero-stat:last-child::after {
      display: none;
    }
    .hero-stat-num {
      font-size: 2.5rem;
      font-weight: 800;
      background: linear-gradient(135deg, #60a5fa, #a78bfa);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 4px;
    }
    .hero-stat-label {
      font-size: 0.85rem;
      color: var(--text-secondary);
    }

    /* ===== New Hero Layout - Two Column ===== */
    .hero-inner-new {
      max-width: var(--max-width);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      text-align: left;
    }
    .hero-left {
      position: relative;
    }
    .hero-left .hero-badge {
      margin-bottom: 28px;
      display: inline-flex;
    }
    .hero-left h1 {
      font-size: clamp(2rem, 4vw, 3.2rem);
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -0.02em;
      margin-bottom: 24px;
    }
    .hero-left .hero-desc {
      margin: 0 0 36px 0;
      max-width: 100%;
      font-size: 1.05rem;
      line-height: 1.75;
      color: var(--text-secondary);
    }
    .hero-left .hero-actions {
      justify-content: flex-start;
      margin-bottom: 40px;
      gap: 16px;
    }
    .hero-features-inline {
      display: flex;
      gap: 28px;
      flex-wrap: wrap;
    }
    .hero-feature-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.9rem;
      color: var(--text-secondary);
      font-weight: 500;
    }
    .hero-feature-icon {
      font-size: 1rem;
      color: var(--accent);
    }
    .hero-right {
      position: relative;
    }
    .hero-preview-card {
      background: var(--bg-card);
      border: 1px solid rgba(75, 85, 99, 0.4);
      border-radius: 20px;
      overflow: hidden;
      backdrop-filter: blur(20px);
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), 0 0 40px rgba(59, 130, 246, 0.1);
      animation: float 6s ease-in-out infinite;
    }
    .preview-card-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 20px;
      background: var(--bg-primary);
      border-bottom: 1px solid var(--border-color);
    }
    .preview-dots {
      display: flex;
      gap: 6px;
    }
    .preview-dots span {
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: #4b5563;
    }
    .preview-dots span:first-child { background: #ef4444; }
    .preview-dots span:nth-child(2) { background: #f59e0b; }
    .preview-dots span:nth-child(3) { background: #10b981; }
    .preview-title {
      font-size: 0.85rem;
      font-weight: 600;
      color: #9ca3af;
      font-family: monospace;
    }
    .preview-actions {
      display: flex;
      gap: 8px;
    }
    .preview-badge {
      padding: 4px 10px;
      background: rgba(16, 185, 129, 0.2);
      color: #34d399;
      font-size: 0.75rem;
      border-radius: 999px;
      border: 1px solid rgba(16, 185, 129, 0.3);
    }
    .preview-card-body {
      display: flex;
      min-height: 300px;
    }
    .preview-sidebar {
      width: 160px;
      padding: 16px 12px;
      background: var(--bg-secondary);
      border-right: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .preview-menu-item {
      padding: 10px 12px;
      font-size: 0.8rem;
      color: #9ca3af;
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .preview-menu-item:hover {
      background: var(--border-color);
      color: #e5e7eb;
    }
    .preview-menu-item.active {
      background: rgba(59, 130, 246, 0.2);
      color: #60a5fa;
      border: 1px solid rgba(59, 130, 246, 0.3);
    }
    .preview-main {
      flex: 1;
      padding: 20px;
    }
    .preview-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin-bottom: 20px;
    }
    .preview-stat {
      text-align: center;
      padding: 12px 8px;
      background: var(--bg-primary);
      border-radius: 10px;
      border: 1px solid var(--border-color);
    }
    .preview-stat-value {
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 2px;
    }
    .preview-stat-label {
      font-size: 0.7rem;
      color: var(--text-secondary);
    }
    .preview-progress-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .preview-progress-item {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 8px;
      align-items: center;
    }
    .preview-progress-name {
      font-size: 0.75rem;
      color: #d1d5db;
      font-family: monospace;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .preview-progress-bar {
      grid-column: 1 / -1;
      height: 6px;
      background: rgba(75, 85, 99, 0.5);
      border-radius: 3px;
      overflow: hidden;
    }
    .preview-progress-fill {
      height: 100%;
      background: linear-gradient(90deg, #3b82f6, #8b5cf6);
      border-radius: 3px;
      transition: width 0.3s ease;
      position: relative;
    }
    .preview-progress-fill::after {
      content: '';
      position: absolute;
      top: 0;
      right: 0;
      width: 20px;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3));
      animation: shimmer 2s infinite;
    }
    @keyframes shimmer {
      0% { transform: translateX(-100%); }
      100% { transform: translateX(100%); }
    }
    .preview-progress-percent {
      font-size: 0.75rem;
      color: #60a5fa;
      font-weight: 600;
    }
    .preview-card-footer {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 12px 20px;
      background: var(--bg-secondary);
      border-top: 1px solid var(--border-color);
      font-size: 0.8rem;
      color: #9ca3af;
    }
    .preview-status-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      animation: pulse 2s ease-in-out infinite;
      box-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
    }

    /* ===== Section Base - Tech Style ===== */
    .section {
      padding: var(--section-padding) 24px;
      position: relative;
    }
    .section-gray {
      background: #ffffff;
      backdrop-filter: blur(10px);
    }
    .section-inner {
      max-width: var(--max-width);
      margin: 0 auto;
      position: relative;
      z-index: 1;
    }
    .section-header {
      text-align: center;
      margin-bottom: 64px;
    }
    .section-eyebrow {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 600;
      color: #60a5fa;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      margin-bottom: 12px;
      position: relative;
    }
    .section-eyebrow::before,
    .section-eyebrow::after {
      content: '';
      position: absolute;
      top: 50%;
      width: 30px;
      height: 1px;
      background: linear-gradient(90deg, transparent, #3b82f6);
    }
    .section-eyebrow::before {
      right: calc(100% + 12px);
    }
    .section-eyebrow::after {
      left: calc(100% + 12px);
      background: linear-gradient(90deg, #3b82f6, transparent);
    }
    .section-title {
      font-size: clamp(1.8rem, 4vw, 2.5rem);
      font-weight: 800;
      color: var(--text-primary);
      margin-bottom: 16px;
      letter-spacing: -0.02em;
      background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-secondary);
      max-width: 600px;
      margin: 0 auto;
      line-height: 1.7;
    }

    /* ===== Features Section - Glassmorphism ===== */
    /* ===== Features Grid - Bento Style ===== */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      grid-auto-rows: minmax(200px, auto);
      gap: 20px;
    }
    .feature-card {
      position: relative;
      padding: 32px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      overflow: hidden;
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      display: flex;
      flex-direction: column;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.1);
      /* Bento Grid - 统一卡片大小 */
      grid-column: span 1;
      grid-row: span 1;
    }
    .feature-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: linear-gradient(90deg, #3b82f6, #8b5cf6, #06b6d4);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .feature-card::after {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.05), transparent);
      transition: left 0.6s ease;
    }
    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 24px 48px -12px rgba(0, 0, 0, 0.4);
      border-color: rgba(59, 130, 246, 0.5);
      background: var(--bg-card);
    }
    .feature-card:hover::before {
      transform: scaleX(1);
    }
    .feature-card:hover::after {
      left: 100%;
    }
    [data-theme="dark"] .feature-card:hover {
      box-shadow: 0 24px 48px -12px rgba(0, 0, 0, 0.5);
    }
    .feature-icon {
      width: 56px;
      height: 56px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.8rem;
      background: rgba(59, 130, 246, 0.15);
      border-radius: 14px;
      margin-bottom: 20px;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      position: relative;
    }
    .feature-icon::after {
      content: '';
      position: absolute;
      inset: -2px;
      border-radius: 16px;
      background: linear-gradient(135deg, #3b82f6, #8b5cf6);
      opacity: 0;
      transition: opacity 0.3s ease;
      z-index: -1;
      filter: blur(8px);
    }
    .feature-card:hover .feature-icon {
      transform: scale(1.1) rotate(-3deg);
      background: rgba(59, 130, 246, 0.25);
    }
    .feature-card:hover .feature-icon::after {
      opacity: 0.4;
    }
    .feature-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 10px;
      transition: color 0.3s ease;
    }
    .feature-card:hover .feature-title {
      color: #60a5fa;
    }
    .feature-desc {
      font-size: 0.95rem;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    /* ===== Data Sources Section - Tech Style ===== */
    .data-showcase {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .data-showcase-content h3 {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 16px;
      background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .data-showcase-content p {
      font-size: 1rem;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .data-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .data-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 16px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      transition: all 0.2s ease;
      backdrop-filter: blur(8px);
    }
    .data-item:hover {
      border-color: rgba(59, 130, 246, 0.5);
      transform: translateX(4px);
      background: var(--bg-card);
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    }
    .data-item-icon {
      width: 36px;
      height: 36px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      background: rgba(59, 130, 246, 0.15);
      border-radius: 8px;
      flex-shrink: 0;
      transition: all 0.2s ease;
    }
    .data-item:hover .data-item-icon {
      transform: scale(1.1);
      background: rgba(59, 130, 246, 0.25);
    }
    .data-item-text {
      font-size: 0.95rem;
      color: var(--text-primary);
      font-weight: 500;
    }

    /* ===== Data Cards Grid - New Design ===== */
    .data-grid-wrapper {
      width: 100%;
      margin-top: 48px;
    }
    .data-cards-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .data-card {
      padding: 28px 24px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      position: relative;
      overflow: hidden;
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      display: flex;
      flex-direction: column;
      gap: 12px;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.1);
    }
    .data-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, var(--card-color, #3b82f6), transparent);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.4s ease;
    }
    .data-card::after {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.03), transparent);
      transition: left 0.6s ease;
    }
    .data-card:hover {
      transform: translateY(-6px);
      border-color: var(--card-color, #3b82f6);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(59, 130, 246, 0.1);
      background: var(--bg-card);
    }
    .data-card:hover::before {
      transform: scaleX(1);
    }
    .data-card:hover::after {
      left: 100%;
    }
    .data-card-icon {
      font-size: 2.5rem;
      margin-bottom: 8px;
      display: inline-block;
      transition: all 0.3s ease;
      filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
    }
    .data-card:hover .data-card-icon {
      transform: scale(1.1) rotate(-5deg);
      filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.3));
    }
    .data-card-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-primary);
      line-height: 1.4;
      transition: color 0.2s ease;
    }
    .data-card:hover .data-card-title {
      color: var(--accent);
    }
    .data-card-desc {
      font-size: 0.85rem;
      color: var(--text-secondary);
      line-height: 1.6;
      flex: 1;
    }
    .data-card-tag {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      padding: 4px 10px;
      background: rgba(59, 130, 246, 0.1);
      border-radius: 999px;
      font-size: 0.75rem;
      color: var(--accent);
      font-weight: 500;
      width: fit-content;
    }
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.02), transparent);
      transition: left 0.6s ease;
    }
    .data-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.4);
      border-color: var(--card-color, rgba(59, 130, 246, 0.5));
      background: var(--bg-card);
    }
    .data-card:hover::before {
      transform: scaleX(1);
    }
    .data-card:hover::after {
      left: 100%;
    }
    [data-theme="dark"] .data-card:hover {
      box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.6);
    }
    .data-card-icon {
      width: 52px;
      height: 52px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      background: var(--card-bg, rgba(59, 130, 246, 0.15));
      border-radius: 14px;
      margin-bottom: 16px;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      position: relative;
    }
    .data-card-icon::after {
      content: '';
      position: absolute;
      inset: -2px;
      border-radius: 16px;
      background: var(--card-color, #3b82f6);
      opacity: 0;
      transition: opacity 0.3s ease;
      z-index: -1;
      filter: blur(8px);
    }
    .data-card:hover .data-card-icon {
      transform: scale(1.1) rotate(-3deg);
    }
    .data-card:hover .data-card-icon::after {
      opacity: 0.3;
    }
    .data-card h3 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 8px;
      line-height: 1.4;
      transition: color 0.3s ease;
    }
    .data-card:hover h3 {
      color: var(--card-color, #60a5fa);
    }
    .data-card p {
      font-size: 0.88rem;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    /* ===== Video Section - Tech Style ===== */
    .video-wrapper {
      max-width: 900px;
      margin: 0 auto;
      border-radius: 20px;
      overflow: hidden;
      background: #000;
      aspect-ratio: 16/9;
      box-shadow: 0 24px 48px -16px rgba(0, 0, 0, 0.4);
      position: relative;
      cursor: pointer;
      border: 1px solid rgba(59, 130, 246, 0.2);
    }
    .video-wrapper::before {
      content: '';
      position: absolute;
      inset: -2px;
      border-radius: 22px;
      background: linear-gradient(135deg, #3b82f6, #8b5cf6, #06b6d4);
      opacity: 0;
      transition: opacity 0.3s ease;
      z-index: -1;
      filter: blur(12px);
    }
    .video-wrapper:hover::before {
      opacity: 0.3;
    }
    [data-theme="dark"] .video-wrapper {
      box-shadow: 0 24px 48px -16px rgba(0, 0, 0, 0.6);
    }
    .video-wrapper video {
      width: 100%;
      height: 100%;
      object-fit: contain;
      display: block;
    }
    .video-overlay {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
      backdrop-filter: blur(4px);
      transition: opacity 0.3s ease;
      z-index: 10;
    }
    .video-overlay.hidden {
      opacity: 0;
      pointer-events: none;
    }
    .video-play-btn {
      width: 80px;
      height: 80px;
      border-radius: 50%;
      background: linear-gradient(135deg, #3b82f6, #8b5cf6);
      color: white;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 32px rgba(59, 130, 246, 0.5);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      margin-bottom: 16px;
    }
    .video-play-btn svg {
      margin-left: 4px;
    }
    .video-wrapper:hover .video-play-btn {
      transform: scale(1.1);
      box-shadow: 0 12px 40px rgba(59, 130, 246, 0.6);
    }
    .video-overlay-text {
      color: white;
      font-size: 1rem;
      font-weight: 500;
      text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    }
    .video-controls {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      padding: 16px 20px;
      background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
      display: flex;
      align-items: center;
      gap: 12px;
      opacity: 0;
      transform: translateY(10px);
      transition: all 0.3s ease;
      z-index: 20;
    }
    .video-wrapper.playing .video-controls,
    .video-wrapper:hover .video-controls {
      opacity: 1;
      transform: translateY(0);
    }
    .video-control-btn {
      background: none;
      border: none;
      color: white;
      cursor: pointer;
      padding: 6px;
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background 0.2s ease;
    }
    .video-control-btn:hover {
      background: rgba(255, 255, 255, 0.2);
    }
    .video-progress {
      flex: 1;
      height: 4px;
      background: rgba(255, 255, 255, 0.3);
      border-radius: 2px;
      cursor: pointer;
      position: relative;
    }
    .video-progress-bar {
      width: 100%;
      height: 100%;
      position: relative;
    }
    .video-progress-fill {
      height: 100%;
      background: linear-gradient(90deg, var(--accent), #7c3aed);
      border-radius: 2px;
      width: 0%;
      transition: width 0.1s linear;
    }
    .video-progress::after {
      content: '';
      position: absolute;
      top: 50%;
      left: 0;
      width: 12px;
      height: 12px;
      background: white;
      border-radius: 50%;
      transform: translate(-50%, -50%);
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
      opacity: 0;
      transition: opacity 0.2s ease;
    }
    .video-progress:hover::after {
      opacity: 1;
    }
    .video-time {
      color: white;
      font-size: 0.85rem;
      font-family: "SFMono-Regular", Consolas, monospace;
      min-width: 90px;
      text-align: center;
    }
    .video-wrapper:fullscreen {
      border-radius: 0;
      max-width: 100%;
    }
    .video-wrapper:-webkit-full-screen {
      border-radius: 0;
      max-width: 100%;
    }

    /* ===== Download Section - Tech Style ===== */
    .download-card {
      max-width: 800px;
      margin: 0 auto;
      padding: 72px 48px;
      background: transparent;
      border: 1px solid var(--border-color);
      border-radius: 28px;
      text-align: center;
      color: var(--text-primary);
      position: relative;
      overflow: hidden;
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      box-shadow: 0 10px 40px -10px rgba(59, 130, 246, 0.15);
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .download-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 60px -15px rgba(59, 130, 246, 0.25);
      border-color: var(--accent);
    }
    .download-card::before {
      content: '';
      position: absolute;
      top: -50%;
      right: -20%;
      width: 60%;
      height: 200%;
      background: radial-gradient(circle, rgba(59, 130, 246, 0.3), transparent 60%);
      animation: float 8s ease-in-out infinite;
    }
    .download-card::after {
      content: '';
      position: absolute;
      bottom: -30%;
      left: -10%;
      width: 40%;
      height: 150%;
      background: radial-gradient(circle, rgba(6, 182, 212, 0.25), transparent 60%);
      animation: float 10s ease-in-out infinite reverse;
    }
    .download-card > * {
      position: relative;
      z-index: 1;
    }
    .download-card h2 {
      font-size: 2.2rem;
      font-weight: 800;
      margin-bottom: 16px;
      letter-spacing: -0.02em;
      background: linear-gradient(135deg, #1e40af 0%, #6d28d9 50%, #0e7490 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .download-card p {
      font-size: 1.1rem;
      color: var(--text-secondary);
      margin-bottom: 36px;
      line-height: 1.7;
    }
    .download-btn {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 18px 48px;
      background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
      color: #fff;
      border-radius: 14px;
      font-size: 1.1rem;
      font-weight: 700;
      box-shadow: 0 8px 32px rgba(59, 130, 246, 0.3);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      position: relative;
      overflow: hidden;
    }
    .download-btn::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
      transition: left 0.6s ease;
    }
    .download-btn:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 16px 48px rgba(59, 130, 246, 0.4);
    }
    .download-btn:hover::before {
      left: 100%;
    }
    .download-note {
      font-size: 1.1rem;
      color: var(--text-secondary);
      margin-bottom: 16px;
      line-height: 1.7;
      text-align: center;
      background: transparent !important;
      border: none !important;
      box-shadow: none !important;
      padding: 0 !important;
    }

    /* ===== Pricing Section - New Tech Style ===== */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      max-width: 1100px;
      margin: 0 auto;
      align-items: stretch;
    }
    .pricing-card {
      padding: 40px 32px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 24px;
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      position: relative;
      overflow: hidden;
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      display: flex;
      flex-direction: column;
      height: 100%;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.1);
    }
    .pricing-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, #3b82f6, #8b5cf6, #06b6d4);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .pricing-card::after {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.05), transparent);
      transition: left 0.8s ease;
      pointer-events: none;
    }
    .pricing-card:hover {
      transform: translateY(-10px);
      box-shadow: 0 32px 64px -16px rgba(0, 0, 0, 0.5), 0 0 40px rgba(59, 130, 246, 0.1);
      border-color: rgba(59, 130, 246, 0.5);
      background: var(--bg-card);
    }
    .pricing-card:hover::before {
      transform: scaleX(1);
    }
    .pricing-card:hover::after {
      left: 100%;
    }
    .pricing-card.featured {
      border: 2px solid transparent;
      background: 
        linear-gradient(#ffffff, #ffffff) padding-box,
        linear-gradient(135deg, #3b82f6, #8b5cf6, #06b6d4) border-box;
      box-shadow: 0 10px 40px -10px rgba(59, 130, 246, 0.3);
      z-index: 2;
    }
    .pricing-card.featured::before {
      transform: scaleX(1);
      height: 4px;
    }
    .pricing-card.featured:hover {
      transform: translateY(-10px);
      box-shadow: 0 40px 80px -20px rgba(59, 130, 246, 0.3), 0 0 80px rgba(139, 92, 246, 0.2);
    }
    .pricing-badge {
      position: absolute;
      top: 24px;
      right: -32px;
      padding: 8px 44px;
      background: linear-gradient(135deg, #3b82f6, #8b5cf6);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      transform: rotate(45deg);
      box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
      letter-spacing: 0.05em;
      text-transform: uppercase;
    }
    .pricing-icon {
      width: 64px;
      height: 64px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.8rem;
      background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(139, 92, 246, 0.12));
      border-radius: 16px;
      margin: 0 auto 20px;
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 
        0 4px 12px rgba(59, 130, 246, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
      position: relative;
    }
    .pricing-icon::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      border-radius: 16px;
      background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(139, 92, 246, 0.2));
      opacity: 0;
      transition: opacity 0.3s ease;
    }
    .pricing-card:hover .pricing-icon {
      transform: translateY(-2px) scale(1.08);
      box-shadow: 
        0 8px 24px rgba(59, 130, 246, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.15);
    }
    .pricing-card:hover .pricing-icon::after {
      opacity: 1;
    }
    .pricing-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 8px;
      letter-spacing: -0.02em;
      text-align: center !important;
      line-height: 1.3;
      display: block;
      width: 100%;
    }
    .pricing-desc {
      font-size: 0.875rem;
      color: var(--text-secondary);
      margin-bottom: 24px;
      line-height: 1.6;
      flex: 1;
      text-align: center;
      font-weight: 400;
    }
    .pricing-price {
      margin-bottom: 24px;
      display: flex;
      align-items: baseline;
      justify-content: center;
      gap: 4px;
    }
    .pricing-price .amount {
      font-size: 2.5rem;
      font-weight: 800;
      background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.1;
      letter-spacing: -0.02em;
    }
    .pricing-price .period {
      font-size: 0.9rem;
      color: var(--text-tertiary);
      font-weight: 500;
    }
    .pricing-features {
      list-style: none;
      margin-bottom: 28px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .pricing-features li {
      padding: 0;
      font-size: 0.9rem;
      color: var(--text-secondary);
      display: flex;
      align-items: center;
      gap: 12px;
      line-height: 1.5;
    }
    .pricing-features li::before {
      content: '';
      width: 20px;
      height: 20px;
      flex-shrink: 0;
      background: linear-gradient(135deg, #10b981, #059669);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: center;
      background-size: 12px;
      box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
    }
    .pricing-btn {
      display: block;
      width: 100%;
      padding: 16px 28px;
      text-align: center;
      font-size: 1rem;
      font-weight: 700;
      background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
      background-size: 200% 200%;
      color: #fff;
      border: none;
      border-radius: 12px;
      transition: all 0.3s ease;
      text-decoration: none;
      position: relative;
      overflow: hidden;
      box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
      animation: gradientShift 3s ease infinite;
      margin-top: auto;
    }
    .pricing-btn::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
      transition: left 0.5s ease;
    }
    .pricing-btn:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 12px 32px rgba(59, 130, 246, 0.5);
    }
    .pricing-btn:hover::before {
      left: 100%;
    }
    .pricing-card.featured .pricing-btn {
      background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
      background-size: 200% 200%;
      color: #fff;
      border: none;
      box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
      animation: gradientShift 3s ease infinite;
    }
    .pricing-card.featured .pricing-btn:hover {
      box-shadow: 0 12px 32px rgba(59, 130, 246, 0.5);
      transform: translateY(-3px) scale(1.02);
    }
    @keyframes gradientShift {
      0%, 100% { background-position: 0% 50%; }
      50% { background-position: 100% 50%; }
    }
    .pricing-qrcode {
      margin-top: 24px;
      text-align: center;
      padding: 20px;
      background: var(--bg-primary);
      border-radius: 16px;
      border: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }
    .pricing-qrcode:hover {
      background: var(--bg-secondary);
      border-color: var(--accent);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1), 0 0 20px rgba(59, 130, 246, 0.08);
    }
    .pricing-qrcode img {
      width: 190px;
      height: 190px;
      border-radius: 12px;
      margin-bottom: 12px;
      padding: 12px;
      background: #fff;
      box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
      transition: all 0.3s ease;
    }
    .pricing-qrcode:hover img {
      transform: scale(1.05);
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
    }
    .pricing-qrcode p {
      font-size: 0.75rem;
      color: var(--text-tertiary);
      line-height: 1.4;
    }

    /* ===== Cursor Glow Effect ===== */
    .cursor-glow {
      position: fixed;
      width: 320px;
      height: 320px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(59, 130, 246, 0.06) 0%, rgba(139, 92, 246, 0.04) 40%, transparent 70%);
      pointer-events: none;
      z-index: 0;
      transform: translate(-50%, -50%);
      transition: opacity 0.3s ease;
      opacity: 0;
      mix-blend-mode: screen;
    }
    .cursor-glow.visible {
      opacity: 1;
    }

    /* ===== Card 3D Tilt ===== */
    .feature-card, .pricing-card, .data-card {
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      transform-style: preserve-3d;
    }

    /* ===== Footer - Tech Style ===== */
    .footer {
      padding: 48px 24px 32px;
      border-top: 1px solid var(--border-color);
      background: var(--bg-primary);
      backdrop-filter: blur(10px);
    }
    .footer-inner {
      max-width: var(--max-width);
      margin: 0 auto;
    }
    .footer-top {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      margin-bottom: 32px;
      flex-wrap: wrap;
      gap: 24px;
    }
    .footer-brand {
      max-width: 300px;
    }
    .footer-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 12px;
      position: relative;
    }
    .footer-logo::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 40px;
      height: 2px;
      background: linear-gradient(90deg, #3b82f6, #8b5cf6);
    }
    .footer-logo-icon {
      font-size: 1.3rem;
      filter: drop-shadow(0 0 6px rgba(59, 130, 246, 0.5));
    }
    .footer-desc {
      font-size: 0.9rem;
      color: var(--text-secondary);
      line-height: 1.6;
    }
    .footer-links {
      display: flex;
      gap: 48px;
    }
    .footer-link-group h4 {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 16px;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      position: relative;
    }
    .footer-link-group h4::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 20px;
      height: 2px;
      background: linear-gradient(90deg, #3b82f6, transparent);
    }
    .footer-link-group ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-link-group a {
      font-size: 0.9rem;
      color: var(--text-secondary);
      transition: all 0.2s ease;
      position: relative;
    }
    .footer-link-group a:hover {
      color: #60a5fa;
      padding-left: 4px;
    }
    .footer-bottom {
      padding-top: 24px;
      border-top: 1px solid var(--border-color);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .footer-copy {
      font-size: 0.85rem;
      color: var(--text-tertiary);
    }

    /* ===== Back to Top Button - Tech Style ===== */
    #backToTop.back-to-top {
      position: fixed;
      bottom: 32px;
      right: 32px;
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
      background-size: 200% 200%;
      color: #fff;
      border: none;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      font-weight: bold;
      box-shadow: 0 4px 20px rgba(59, 130, 246, 0.5);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      opacity: 0;
      visibility: hidden;
      transform: translateY(20px) scale(0.9);
      z-index: 9999 !important;
      animation: gradientShift 3s ease infinite;
      pointer-events: none;
    }
    #backToTop.back-to-top.visible {
      opacity: 1;
      visibility: visible;
      transform: translateY(0) scale(1);
      pointer-events: auto;
    }
    #backToTop.back-to-top:hover {
      transform: translateY(-4px) scale(1.1);
      box-shadow: 0 8px 30px rgba(59, 130, 246, 0.6);
    }
    #backToTop.back-to-top::before {
      content: '';
      position: absolute;
      inset: -4px;
      border-radius: 50%;
      background: linear-gradient(135deg, #3b82f6, #8b5cf6, #06b6d4);
      opacity: 0;
      transition: opacity 0.3s ease;
      z-index: -1;
      filter: blur(12px);
    }
    #backToTop.back-to-top:hover::before {
      opacity: 0.7;
    }
    #backToTop.back-to-top:active {
      transform: translateY(-2px) scale(1.05);
    }

    /* ===== Scroll Progress Bar - Tech Style ===== */
    .scroll-progress {
      position: fixed;
      top: 0;
      left: 0;
      height: 2px;
      background: linear-gradient(90deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
      z-index: 101;
      transition: width 0.1s ease;
      box-shadow: 0 0 10px rgba(59, 130, 246, 0.5);
    }

    /* ===== Animations ===== */
    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(15px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    @keyframes pulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.5; }
    }
    @keyframes float {
      0%, 100% { transform: translateY(0) rotate(0deg); }
      50% { transform: translateY(-20px) rotate(5deg); }
    }

    /* Scroll reveal animation */
    .reveal {
      opacity: 0;
      transform: translateY(20px);
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* ===== Scrollbar ===== */
    ::-webkit-scrollbar {
      width: 8px;
      height: 8px;
    }
    ::-webkit-scrollbar-track {
      background: transparent;
    }
    ::-webkit-scrollbar-thumb {
      background: var(--border-color);
      border-radius: 4px;
      transition: background 0.2s ease;
    }
    ::-webkit-scrollbar-thumb:hover {
      background: var(--text-tertiary);
    }

    /* ===== Selection ===== */
    ::selection {
      background: var(--accent-light);
      color: var(--accent);
    }

    /* ===== Responsive ===== */
    @media (max-width: 900px) {
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: flex;
      }
      .hero-stats {
        gap: 32px;
      }
      .hero-stat-num {
        font-size: 1.5rem;
      }
      .data-showcase {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .carousel-slide {
        flex-direction: column;
        text-align: center;
        padding: 32px 24px;
      }
      .footer-top {
        flex-direction: column;
      }
      .footer-links {
        gap: 32px;
      }
      
      /* Hero mobile */
      .hero-inner-new {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
      }
      .hero-left .hero-actions {
        justify-content: center;
      }
      .hero-inline-features {
        justify-content: center;
      }
      .hero-right {
        max-width: 400px;
        margin: 0 auto;
      }
      
      /* Features grid mobile */
      .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      
      /* Data cards grid mobile */
      .data-cards-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
      }
      
      /* Pricing grid mobile */
      .pricing-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        max-width: 400px;
        margin: 0 auto;
      }
      .pricing-card.featured {
        transform: none;
      }
    }
    @media (max-width: 640px) {
      :root {
        --section-padding: 64px;
      }
      .nav-inner {
        padding: 0 16px;
      }
      .nav-cta {
        display: none;
      }
      .hero {
        padding: 100px 16px 60px;
      }
      .hero-stats {
        flex-direction: column;
        gap: 20px;
        margin-top: 40px;
      }
      .download-card {
        padding: 40px 24px;
      }
      .download-card h2 {
        font-size: 1.5rem;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
      .back-to-top {
        bottom: 24px;
        right: 24px;
        width: 44px;
        height: 44px;
      }
      
      /* Hero mobile small */
      .hero-left h1 {
        font-size: 2rem;
        line-height: 1.3;
      }
      .hero-left .hero-desc {
        font-size: 1rem;
      }
      .hero-left .hero-actions {
        flex-direction: column;
        width: 100%;
      }
      .hero-left .hero-actions .btn-primary,
      .hero-left .hero-actions .btn-secondary {
        width: 100%;
        justify-content: center;
      }
      .hero-inline-features {
        flex-wrap: wrap;
        gap: 12px;
      }
      
      /* Data cards grid small mobile */
      .data-cards-grid {
        grid-template-columns: 1fr;
      }
      
      /* Section titles mobile */
      .section-title {
        font-size: 1.5rem;
      }
      .section-desc {
        font-size: 0.95rem;
      }
      
      /* Feature card mobile */
      .feature-card {
        padding: 24px;
      }
      .feature-icon {
        width: 48px;
        height: 48px;
        font-size: 1.5rem;
      }
      .feature-card h3 {
        font-size: 1.1rem;
      }
      
      /* Pricing card mobile */
      .pricing-card {
        padding: 28px 24px;
      }
      .pricing-icon {
        width: 56px;
        height: 56px;
        font-size: 1.5rem;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 16px;
        border-radius: 14px;
        box-shadow: 
          0 3px 10px rgba(59, 130, 246, 0.1),
          inset 0 1px 0 rgba(255, 255, 255, 0.1);
      }
      .pricing-card h3 {
        text-align: center;
        font-size: 1.15rem;
        font-weight: 700;
        margin-bottom: 6px;
        letter-spacing: -0.02em;
      }
      .pricing-desc {
        text-align: center;
        font-size: 0.85rem;
        line-height: 1.6;
        margin-bottom: 20px;
      }
      .pricing-price {
        justify-content: center;
        margin-bottom: 20px;
      }
      .pricing-price .amount {
        font-size: 2.2rem;
        font-weight: 800;
        letter-spacing: -0.02em;
      }
      .pricing-qrcode img {
        width: 240px;
        height: 240px;
      }
    }
    
    /* ===== Dark Mode Enhancements ===== */
    [data-theme="dark"] .hero::before {
      background:
        radial-gradient(ellipse 900px 700px at 15% 25%, rgba(59, 130, 246, 0.2), transparent),
        radial-gradient(ellipse 700px 600px at 85% 75%, rgba(139, 92, 246, 0.15), transparent),
        radial-gradient(ellipse 600px 500px at 50% 50%, rgba(6, 182, 212, 0.1), transparent);
    }
    [data-theme="dark"] .hero-grid {
      background-image:
        linear-gradient(rgba(59, 130, 246, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.05) 1px, transparent 1px);
    }
    [data-theme="dark"] .hero-lines {
      opacity: 1;
    }
    [data-theme="dark"] .hero-line {
      background: linear-gradient(180deg, transparent, rgba(59, 130, 246, 0.3), transparent);
    }
    [data-theme="dark"] .footer {
      background: rgba(10, 14, 26, 0.5);
    }
    [data-theme="dark"] .download-card {
      background: linear-gradient(135deg, rgba(30, 58, 138, 0.6) 0%, rgba(76, 29, 149, 0.6) 50%, rgba(15, 118, 110, 0.6) 100%);
      border: 1px solid rgba(59, 130, 246, 0.3);
      color: #fff;
    }
    [data-theme="dark"] .download-card h2 {
      background: linear-gradient(135deg, #fff 0%, #93c5fd 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    [data-theme="dark"] .download-card p {
      color: rgba(255, 255, 255, 0.85);
    }
    [data-theme="dark"] .download-note {
      color: rgba(255, 255, 255, 0.85);
    }
    [data-theme="dark"] .download-btn {
      background: linear-gradient(135deg, #fff 0%, #e0e7ff 100%);
      color: #4338ca;
    }
    [data-theme="dark"] .pricing-card.featured {
      background: 
        linear-gradient(rgba(31, 41, 55, 0.7), rgba(31, 41, 55, 0.7)) padding-box,
        linear-gradient(135deg, #3b82f6, #8b5cf6, #06b6d4) border-box;
      box-shadow: 0 0 60px rgba(59, 130, 246, 0.15);
    }
    [data-theme="dark"] .pricing-card.featured:hover {
      box-shadow: 0 40px 80px -20px rgba(59, 130, 246, 0.3), 0 0 80px rgba(139, 92, 246, 0.2);
    }
    [data-theme="dark"] .preview-card-header {
      background: var(--bg-secondary);
    }
    [data-theme="dark"] .preview-stat {
      background: rgba(55, 65, 81, 0.4);
    }
    [data-theme="dark"] .preview-stat-value {
      color: #f9fafb;
    }
    [data-theme="dark"] .preview-stat-label {
      color: #6b7280;
    }
    [data-theme="dark"] .pricing-qrcode {
      background: rgba(255, 255, 255, 0.03);
      border-color: rgba(255, 255, 255, 0.06);
    }
    [data-theme="dark"] .pricing-qrcode:hover {
      background: rgba(255, 255, 255, 0.05);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2), 0 0 20px rgba(59, 130, 246, 0.08);
    }
    [data-theme="dark"] .section-gray {
      background: rgba(17, 24, 39, 0.3);
    }
    [data-theme="dark"] .download-card {
      background: linear-gradient(135deg, rgba(30, 58, 138, 0.6) 0%, rgba(76, 29, 149, 0.6) 50%, rgba(15, 118, 110, 0.6) 100%);
      border: 1px solid rgba(59, 130, 246, 0.3);
      color: #fff;
      box-shadow: none;
    }
    [data-theme="dark"] .hero h1 {
      color: #ffffff;
      text-shadow: 0 2px 20px rgba(59, 130, 246, 0.2);
    }
    [data-theme="dark"] .hero h1 .gradient {
      background: linear-gradient(135deg, #93c5fd 0%, #c4b5fd 30%, #67e8f9 70%, #6ee7b7 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      filter: drop-shadow(0 0 20px rgba(59, 130, 246, 0.3));
    }
    [data-theme="dark"] .hero-desc {
      color: rgba(255, 255, 255, 0.6);
    }
    [data-theme="dark"] .btn-secondary {
      background: rgba(255, 255, 255, 0.05);
      color: rgba(255, 255, 255, 0.9);
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    [data-theme="dark"] .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: rgba(59, 130, 246, 0.5);
    }