:root {
      --navy: #0a1628;
      --ink: #1a2744;
      --teal: #2dd4bf;
      --gold: #c9a84c;
      --violet: #818cf8;
      --coral: #f97066;
      --text-primary: #f1f5f9;
      --text-secondary: #94a3b8;
      --text-muted: #64748b;
      --card-bg: rgba(26, 39, 68, 0.5);
      --card-border: rgba(255,255,255,0.08);
    }

    * { margin: 0; padding: 0; box-sizing: border-box; }

    body {
      font-family: 'Noto Sans SC', sans-serif;
      background: var(--navy);
      color: var(--text-primary);
      min-height: 100vh;
      overflow-x: hidden;
    }

    /* === Background === */
    .bg-layer {
      position: fixed;
      inset: 0;
      z-index: 0;
      background:
        radial-gradient(ellipse 70% 50% at 10% 20%, rgba(45,212,191,0.07) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 90% 70%, rgba(129,140,248,0.07) 0%, transparent 60%),
        radial-gradient(ellipse 50% 50% at 50% 50%, rgba(201,168,76,0.04) 0%, transparent 60%);
    }
    .grid-overlay {
      position: fixed;
      inset: 0;
      background-image:
        linear-gradient(rgba(201,168,76,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(201,168,76,0.02) 1px, transparent 1px);
      background-size: 80px 80px;
      z-index: 0;
    }
    .orb {
      position: fixed;
      border-radius: 50%;
      filter: blur(100px);
      opacity: 0.3;
      animation: orbFloat 22s ease-in-out infinite;
      z-index: 0;
    }
    .orb-1 { width: 500px; height: 500px; background: var(--teal); top: -150px; right: -150px; }
    .orb-2 { width: 400px; height: 400px; background: var(--violet); bottom: -100px; left: -100px; animation-delay: -8s; }
    .orb-3 { width: 250px; height: 250px; background: var(--gold); top: 45%; left: 45%; animation-delay: -16s; opacity: 0.15; }
    @keyframes orbFloat {
      0%, 100% { transform: translate(0,0) scale(1); }
      33% { transform: translate(40px,-40px) scale(1.08); }
      66% { transform: translate(-30px,30px) scale(0.92); }
    }

    .particles { position: fixed; inset: 0; z-index: 1; pointer-events: none; }
    .particle {
      position: absolute;
      width: 2px; height: 2px;
      background: var(--gold);
      border-radius: 50%;
      animation: particleFade 5s ease-in-out infinite;
    }
    @keyframes particleFade {
      0%, 100% { opacity:0; transform: translateY(0) scale(0.5); }
      50% { opacity:0.5; transform: translateY(-30px) scale(1); }
    }

    /* === Layout === */
    .wrapper {
      position: relative;
      z-index: 10;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 40px;
    }

    /* === Navbar === */
    .navbar {
      position: fixed;
      top: 0; left: 0; right: 0;
      z-index: 100;
      padding: 0 40px;
      height: 72px;
      display: flex;
      align-items: center;
      transition: all 0.3s ease;
      background: transparent;
    }
    .navbar.scrolled {
      background: rgba(10,22,40,0.9);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(201,168,76,0.1);
      box-shadow: 0 4px 30px rgba(0,0,0,0.3);
    }
    .nav-container {
      max-width: 1280px;
      margin: 0 auto;
      width: 100%;
      display: flex;
      align-items: center;
      gap: 40px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: var(--text-primary);
    }
    .logo-icon {
      width: 36px; height: 36px;
      background: linear-gradient(135deg, var(--teal), var(--gold));
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
    }
    .logo-text {
      font-size: 18px;
      font-weight: 700;
      letter-spacing: 1px;
    }
    .nav-links {
      display: flex;
      list-style: none;
      gap: 32px;
      margin-left: 40px;
    }
    .nav-links a {
      color: var(--text-secondary);
      text-decoration: none;
      font-size: 14px;
      font-weight: 500;
      transition: color 0.3s ease;
      position: relative;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px; left: 0;
      width: 0; height: 2px;
      background: var(--gold);
      transition: width 0.3s ease;
    }
    .nav-links a:hover { color: var(--text-primary); }
    .nav-links a:hover::after { width: 100%; }
    /* nav hover dropdown */
    .nav-dropdown { position: relative; }
    .nav-dropdown > a { cursor: pointer; }
    .dd-arrow { font-size: 10px; margin-left: 2px; }
    .dropdown-menu {
      display: none;
      position: absolute;
      top: calc(100% + 10px);
      left: 50%;
      transform: translateX(-50%);
      min-width: 190px;
      list-style: none;
      margin: 0;
      padding: 8px 0;
      background: rgba(13, 27, 46, 0.98);
      border: 1px solid rgba(212, 175, 55, 0.25);
      border-radius: 10px;
      box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
      z-index: 1000;
    }
    /* invisible hover bridge to prevent menu flicker */
    .nav-dropdown::after {
      content: '';
      position: absolute;
      left: 0; right: 0;
      top: 100%; height: 12px;
    }
    .dropdown-menu::before {
      content: '';
      position: absolute;
      top: -6px; left: 50%;
      transform: translateX(-50%) rotate(45deg);
      width: 10px; height: 10px;
      background: rgba(13, 27, 46, 0.98);
      border-left: 1px solid rgba(212, 175, 55, 0.25);
      border-top: 1px solid rgba(212, 175, 55, 0.25);
    }
    .nav-dropdown:hover .dropdown-menu { display: block; }
    .dropdown-menu li { width: 100%; }
    .dropdown-menu a {
      display: block;
      padding: 11px 18px;
      color: var(--text-secondary);
      font-size: 14px;
      text-decoration: none;
      white-space: nowrap;
      transition: all 0.2s ease;
    }
    .dropdown-menu a::after { display: none; }
    .dropdown-menu a:hover {
      color: var(--gold);
      background: rgba(212, 175, 55, 0.08);
      padding-left: 24px;
    }
    .nav-cta {
      padding: 8px 20px;
      background: transparent;
      border: 1px solid var(--gold);
      color: var(--gold);
      border-radius: 6px;
      font-size: 14px;
      font-weight: 500;
      text-decoration: none;
      transition: all 0.3s ease;
    }
    .nav-cta:hover {
      background: var(--gold);
      color: var(--navy);
    }
    .mobile-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      padding: 10px;
    }
    .mobile-toggle span {
      width: 24px; height: 2px;
      background: var(--text-primary);
      transition: all 0.3s;
    }

    /* === Hero === */
    .hero {
      padding: 160px 0 100px;
      position: relative;
    }
    .hero-grid {
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(201,168,76,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(201,168,76,0.03) 1px, transparent 1px);
      background-size: 60px 60px;
      mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    }
    .hero-content {
      position: relative;
      z-index: 1;
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 20px;
      background: rgba(201,168,76,0.1);
      border: 1px solid rgba(201,168,76,0.3);
      border-radius: 50px;
      font-size: 12px;
      color: var(--gold);
      font-weight: 500;
      letter-spacing: 2px;
      margin-bottom: 32px;
      opacity: 0;
      animation: fadeUp 0.7s ease forwards;
    }
    .hero-badge::before {
      content: '';
      width: 6px; height: 6px;
      background: var(--gold);
      border-radius: 50%;
      animation: pulse 2s ease-in-out infinite;
    }
    @keyframes pulse {
      0%, 100% { opacity:1; }
      50% { opacity:0.4; }
    }
    h1 {
      font-size: clamp(36px, 5vw, 64px);
      font-weight: 900;
      line-height: 1.2;
      margin-bottom: 24px;
      opacity: 0;
      animation: fadeUp 0.7s ease 0.1s forwards;
    }
    h1 span {
      background: linear-gradient(135deg, var(--teal) 0%, var(--gold) 50%, var(--violet) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-desc {
      font-size: 17px;
      color: var(--text-secondary);
      line-height: 1.9;
      max-width: 680px;
      margin: 0 auto 40px;
      opacity: 0;
      animation: fadeUp 0.7s ease 0.2s forwards;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      justify-content: center;
      opacity: 0;
      animation: fadeUp 0.7s ease 0.3s forwards;
      flex-wrap: wrap;
    }
    @keyframes fadeUp {
      from { opacity:0; transform:translateY(24px); }
      to { opacity:1; transform:translateY(0); }
    }
    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 14px 32px;
      background: linear-gradient(135deg, var(--gold), #d4af37);
      color: var(--navy);
      font-size: 15px;
      font-weight: 600;
      border-radius: 8px;
      text-decoration: none;
      transition: all 0.3s ease;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(201,168,76,0.4);
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 14px 32px;
      background: transparent;
      color: var(--text-primary);
      font-size: 15px;
      font-weight: 500;
      border-radius: 8px;
      text-decoration: none;
      border: 1px solid rgba(255,255,255,0.2);
      transition: all 0.3s ease;
      cursor: pointer;
    }
    .btn-secondary:hover {
      border-color: var(--text-primary);
      background: rgba(255,255,255,0.05);
    }

    /* === Stats === */
    .stats {
      padding: 60px 0;
      opacity: 0;
      animation: fadeUp 0.7s ease 0.4s forwards;
    }
    .stats-container {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    @media (max-width: 900px) {
      .stats-container { grid-template-columns: repeat(2, 1fr); }
    }
    .stat-item {
      text-align: center;
      padding: 24px;
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: 16px;
      transition: all 0.3s ease;
    }
    .stat-item:hover {
      border-color: rgba(201,168,76,0.3);
      transform: translateY(-4px);
    }
    .stat-number {
      font-size: 36px;
      font-weight: 900;
      background: linear-gradient(135deg, var(--teal), var(--gold));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 8px;
    }
    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* === Section Common === */
    .section-header {
      text-align: center;
      margin-bottom: 60px;
    }
    .section-tag {
      display: inline-block;
      font-size: 11px;
      letter-spacing: 4px;
      text-transform: uppercase;
      color: var(--gold);
      font-weight: 500;
      margin-bottom: 12px;
      padding: 6px 16px;
      background: rgba(201,168,76,0.1);
      border-radius: 50px;
      border: 1px solid rgba(201,168,76,0.2);
    }
    .section-title {
      font-size: clamp(28px, 3.5vw, 44px);
      font-weight: 900;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 600px;
      margin: 0 auto;
      line-height: 1.8;
    }

    /* === Apps (three terminals) === */
    .apps { padding: 80px 0; }
    .apps-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    @media (max-width: 1024px) {
      .apps-grid { grid-template-columns: 1fr; max-width: 600px; margin: 0 auto; }
    }
    .app-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: 20px;
      padding: 36px 28px;
      position: relative;
      overflow: hidden;
      transition: all 0.5s cubic-bezier(0.4,0,0.2,1);
      display: flex;
      flex-direction: column;
    }
    .app-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 3px;
      background: var(--pc-accent);
      opacity: 0.7;
    }
    .app-card::after {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(ellipse at top, var(--pc-glow), transparent 65%);
      opacity: 0;
      transition: opacity 0.5s ease;
    }
    .app-card:hover {
      transform: translateY(-8px);
      border-color: var(--pc-accent);
      box-shadow: 0 24px 64px -24px var(--pc-glow);
    }
    .app-card:hover::after { opacity: 1; }
    .app-card[data-color="teal"]  { --pc-accent: var(--teal);  --pc-glow: rgba(45,212,191,0.15); }
    .app-card[data-color="gold"]  { --pc-accent: var(--gold);  --pc-glow: rgba(201,168,76,0.15); }
    .app-card[data-color="violet"]{ --pc-accent: var(--violet);--pc-glow: rgba(129,140,248,0.15); }
    .app-icon {
      font-size: 40px;
      margin-bottom: 20px;
      position: relative;
      z-index: 1;
    }
    .app-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 8px;
      line-height: 1.4;
      position: relative;
      z-index: 1;
    }
    .app-role {
      font-size: 13px;
      color: var(--pc-accent);
      font-weight: 500;
      margin-bottom: 16px;
      position: relative;
      z-index: 1;
    }
    .app-desc {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.8;
      margin-bottom: 28px;
      position: relative;
      z-index: 1;
      flex: 1;
    }
    .app-btn {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 12px 24px;
      background: rgba(255,255,255,0.04);
      border: 1px solid var(--pc-accent);
      color: var(--pc-accent);
      border-radius: 8px;
      font-size: 14px;
      font-weight: 600;
      text-decoration: none;
      transition: all 0.3s ease;
      position: relative;
      z-index: 1;
      align-self: flex-start;
    }
    .app-btn:hover {
      background: var(--pc-accent);
      color: var(--navy);
    }

    /* === Products === */
    .products { padding: 80px 0; }
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    @media (max-width: 1024px) {
      .products-grid { grid-template-columns: 1fr; max-width: 600px; margin: 0 auto; }
    }
    .product-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: 20px;
      padding: 36px 28px;
      position: relative;
      overflow: hidden;
      transition: all 0.5s cubic-bezier(0.4,0,0.2,1);
    }
    .product-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 3px;
      background: var(--pc-accent);
      opacity: 0.7;
    }
    .product-card::after {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(ellipse at top, var(--pc-glow), transparent 65%);
      opacity: 0;
      transition: opacity 0.5s ease;
    }
    .product-card:hover {
      transform: translateY(-8px);
      border-color: var(--pc-accent);
      box-shadow: 0 24px 64px -24px var(--pc-glow);
    }
    .product-card:hover::after { opacity: 1; }

    .product-card[data-color="teal"]  { --pc-accent: var(--teal); --pc-glow: rgba(45,212,191,0.15); }
    .product-card[data-color="gold"]  { --pc-accent: var(--gold); --pc-glow: rgba(201,168,76,0.15); }
    .product-card[data-color="violet"]{ --pc-accent: var(--violet);--pc-glow: rgba(129,140,248,0.15); }

    .product-icon {
      font-size: 40px;
      margin-bottom: 20px;
      position: relative;
      z-index: 1;
    }
    .product-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
      line-height: 1.4;
      position: relative;
      z-index: 1;
    }
    .product-desc {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.8;
      margin-bottom: 24px;
      position: relative;
      z-index: 1;
    }
    .product-features {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      position: relative;
      z-index: 1;
    }
    .product-features li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 13px;
      color: var(--text-secondary);
    }
    .product-features li::before {
      content: '';
      width: 5px; height: 5px;
      background: var(--pc-accent);
      border-radius: 50%;
      flex-shrink: 0;
      box-shadow: 0 0 6px var(--pc-accent);
    }

    /* === Features === */
    .features { padding: 80px 0; }
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    @media (max-width: 900px) {
      .features-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 500px) {
      .features-grid { grid-template-columns: 1fr; }
    }
    .feature-item {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: 16px;
      padding: 28px 24px;
      transition: all 0.4s ease;
    }
    .feature-item:hover {
      border-color: rgba(201,168,76,0.3);
      transform: translateY(-4px);
    }
    .feature-icon {
      font-size: 28px;
      margin-bottom: 16px;
    }
    .feature-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .feature-text {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* === Scenarios === */
    .scenarios { padding: 80px 0; }
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }
    @media (max-width: 800px) {
      .scenarios-grid { grid-template-columns: 1fr; }
    }
    .scenario-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: 20px;
      padding: 32px;
      position: relative;
      overflow: hidden;
      transition: all 0.4s ease;
    }
    .scenario-card:hover {
      border-color: rgba(201,168,76,0.3);
      transform: translateY(-4px);
    }
    .scenario-number {
      position: absolute;
      top: 20px; right: 24px;
      font-size: 72px;
      font-weight: 900;
      font-family: 'Playfair Display', serif;
      color: var(--text-primary);
      opacity: 0.04;
      line-height: 1;
    }
    .scenario-icon {
      font-size: 32px;
      margin-bottom: 16px;
    }
    .scenario-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .scenario-desc {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.8;
      margin-bottom: 20px;
    }
    .scenario-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .scenario-tag {
      padding: 4px 12px;
      background: rgba(201,168,76,0.1);
      border: 1px solid rgba(201,168,76,0.2);
      border-radius: 50px;
      font-size: 12px;
      color: var(--gold);
    }

    /* === CTA === */
    .cta {
      padding: 100px 0;
    }
    .cta-content {
      text-align: center;
      background: linear-gradient(135deg, rgba(201,168,76,0.1), rgba(45,212,191,0.1));
      border: 1px solid rgba(201,168,76,0.2);
      border-radius: 24px;
      padding: 80px 40px;
      position: relative;
      overflow: hidden;
    }
    .cta-content::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(ellipse at center, rgba(201,168,76,0.05), transparent 70%);
    }
    .cta-title {
      font-size: clamp(24px, 3vw, 36px);
      font-weight: 900;
      margin-bottom: 16px;
      position: relative;
      z-index: 1;
    }
    .cta-desc {
      font-size: 16px;
      color: var(--text-secondary);
      margin-bottom: 32px;
      position: relative;
      z-index: 1;
    }
    .cta .btn-primary {
      position: relative;
      z-index: 1;
    }

    /* === Footer === */
    .footer {
      padding: 60px 0 0;
      border-top: 1px solid rgba(255,255,255,0.06);
    }
    .footer-content {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 48px;
    }
    @media (max-width: 900px) {
      .footer-content { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 500px) {
      .footer-content { grid-template-columns: 1fr; }
    }
    .footer-brand { }
    .footer-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 16px;
    }
    .footer-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 20px;
    }
    .footer-social {
      display: flex;
      gap: 12px;
    }
    .footer-social a {
      width: 36px; height: 36px;
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      font-size: 16px;
      transition: all 0.3s ease;
    }
    .footer-social a:hover {
      background: rgba(201,168,76,0.2);
      border-color: var(--gold);
    }
    .footer-col h4 {
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 20px;
      color: var(--text-primary);
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-links a {
      font-size: 13px;
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.3s ease;
    }
    .footer-links a:hover { color: var(--gold); }
    .footer-contact p {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 8px;
      display: flex;
      align-items: flex-start;
      gap: 8px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.06);
      padding: 20px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .footer-bottom p {
      font-size: 12px;
      color: var(--text-muted);
    }
    .icp-number {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* === Animation === */
    .fade-in {
      opacity: 0;
      transform: translateY(30px);
      transition: all 0.6s ease;
    }
    .fade-in.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* === Layout spacing utility === */
    section { padding: 80px 0; }