:root {
    --primary: #0D1B2A;
    --secondary: #1B263B;
    --accent: #00C6FF;
    --highlight: #00E6FF;
    --text: #FFFFFF;
    --muted: #A9CCE3;
    --radius: 10px;
    --shadow: 0 4px 20px rgba(0, 198, 255, 0.15);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

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

  body {
    background: radial-gradient(circle at 20% 30%, #0D1B2A 0%, #050A12 100%);
    color: var(--text);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
  }

  .wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  .header {
    position: relative;
    height: 80vh;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 20px;
    overflow: hidden;
  }

  .header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(13,27,42,0.8) 0%, rgba(0,0,0,0.9) 100%);
    z-index: 1;
  }

  .header-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
  }

  .header h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(90deg, var(--accent), var(--highlight));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 20px rgba(0, 198, 255, 0.3);
  }

  .header p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: var(--muted);
  }

  .notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 198, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 15px 25px;
    border-radius: var(--radius);
    border: 1px solid rgba(0, 198, 255, 0.3);
    z-index: 1000;
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(0, 198, 255, 0.4); }
    70% { box-shadow: 0 0 0 15px rgba(0, 198, 255, 0); }
    100% { box-shadow: 0 0 0 0 rgba(0, 198, 255, 0); }
  }

  .navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(27, 38, 59, 0.9);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    display: flex;
    justify-content: center;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 198, 255, 0.1);
  }

  .nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    padding: 0 20px;
  }

  .nav-links {
    display: flex;
    gap: 30px;
  }

  .nav-links a {
    color: var(--muted);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
  }

  .nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
  }

  .nav-links a:hover {
    color: var(--accent);
  }

  .nav-links a:hover::after {
    width: 100%;
  }

  .btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: var(--radius);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
  }

  .btn-primary {
    background: linear-gradient(90deg, var(--accent), var(--highlight));
    color: var(--primary);
    box-shadow: var(--shadow);
  }

  .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 198, 255, 0.3);
  }

  .btn-outline {
    border: 1px solid var(--accent);
    color: var(--accent);
    margin-left: 15px;
  }

  .btn-outline:hover {
    background: rgba(0, 198, 255, 0.1);
  }

  .section {
    padding: 100px 0;
    position: relative;
  }

  .section-title {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
  }

  .section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--accent), var(--highlight));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--highlight));
    margin: 0 auto;
    border-radius: 2px;
  }

  .card {
    background: rgba(27, 38, 59, 0.7);
    backdrop-filter: blur(10px);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(0, 198, 255, 0.1);
    margin-bottom: 30px;
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 198, 255, 0.2);
    border-color: rgba(0, 198, 255, 0.3);
  }

  .card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius);
    margin-bottom: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
  }

  .card:hover .card-img {
    transform: scale(1.03);
  }

  .card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--accent);
  }

  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
  }

  .feature {
    text-align: center;
    padding: 40px 20px;
  }

  .feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 198, 255, 0.1);
    border-radius: 50%;
    font-size: 2rem;
    color: var(--accent);
    transition: var(--transition);
  }

  .feature:hover .feature-icon {
    background: rgba(0, 198, 255, 0.2);
    transform: rotate(15deg) scale(1.1);
  }

  .feature h3 {
    margin-bottom: 15px;
    font-size: 1.3rem;
  }

  .code-block {
    background: rgba(13, 27, 42, 0.8);
    border-radius: var(--radius);
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
    border-left: 4px solid var(--accent);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
  }

  .code-block code {
    color: var(--accent);
    display: block;
    white-space: pre;
  }

  .footer {
    background: var(--secondary);
    padding: 60px 0 20px;
    text-align: center;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 30px;
  }

  .footer-links a {
    color: var(--muted);
    text-decoration: none;
    transition: var(--transition);
  }

  .footer-links a:hover {
    color: var(--accent);
  }

  .copyright {
    color: var(--muted);
    font-size: 0.9rem;
    margin-top: 30px;
  }

  @media (max-width: 768px) {
    .header h1 {
      font-size: 2.5rem;
    }
    
    .nav-links {
      gap: 15px;
    }
    
    .section {
      padding: 60px 0;
    }
    
    .section-title h2 {
      font-size: 2rem;
    }
  }

  @media (max-width: 480px) {
    .header h1 {
      font-size: 2rem;
    }
    
    .nav-container {
      flex-direction: column;
      gap: 15px;
    }
    
    .btn-outline {
      margin-left: 0;
      margin-top: 10px;
    }
  }

  /* Custom animations */
  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
  }

  .floating {
    animation: float 6s ease-in-out infinite;
  }

  @keyframes glow {
    0% { box-shadow: 0 0 10px rgba(0, 198, 255, 0.5); }
    50% { box-shadow: 0 0 20px rgba(0, 198, 255, 0.8); }
    100% { box-shadow: 0 0 10px rgba(0, 198, 255, 0.5); }
  }

  .glowing {
    animation: glow 3s infinite;
  }

  /* Particle background */
  .particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
  }

  .particle {
    position: absolute;
    background: rgba(0, 198, 255, 0.5);
    border-radius: 50%;
    animation: float 15s infinite linear;
  }

  /* Responsive images */
  .responsive-img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
  }

  .responsive-img:hover {
    transform: scale(1.02);
  }

  /* Tooltip */
  .tooltip {
    position: relative;
    display: inline-block;
    border-bottom: 1px dotted var(--muted);
    cursor: help;
  }

  .tooltip .tooltiptext {
    visibility: hidden;
    width: 200px;
    background-color: var(--secondary);
    color: var(--text);
    text-align: center;
    border-radius: var(--radius);
    padding: 10px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 0.9rem;
    box-shadow: var(--shadow);
  }

  .tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
  }

  /* Accordion */
  .accordion {
    background: rgba(27, 38, 59, 0.7);
    border-radius: var(--radius);
    margin-bottom: 10px;
    overflow: hidden;
  }

  .accordion-header {
    padding: 15px 20px;
    background: rgba(0, 198, 255, 0.1);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
  }

  .accordion-header:hover {
    background: rgba(0, 198, 255, 0.2);
  }

  .accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    padding: 0 20px;
  }

  .accordion.active .accordion-content {
    max-height: 500px;
    padding: 20px;
  }

  /* Custom scrollbar */
  ::-webkit-scrollbar {
    width: 8px;
  }

  ::-webkit-scrollbar-track {
    background: var(--primary);
  }

  ::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 4px;
  }

  ::-webkit-scrollbar-thumb:hover {
    background: var(--highlight);
  }