:root {
    --primary: #2196F3;
    --secondary: #E0E0E0;
    --accent: #FFC107;
    --text: #333;
    --light: #fff;
    --dark: #222;
    --radius: 8px;
    --shadow: 0 4px 6px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
  }

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

  body {
    font-family: 'Roboto', 'Helvetica', sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: linear-gradient(135deg, var(--secondary) 0%, var(--light) 100%);
    min-height: 100%;
    overflow-x: hidden;
  }

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

  header {
    background: rgba(255,255,255,0.9);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 15px 0;
  }

  .nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
  }

  .logo img {
    width: 40px;
    height: 40px;
    margin-right: 10px;
    border-radius: 50%;
  }

  nav ul {
    display: flex;
    list-style: none;
  }

  nav ul li {
    margin-left: 30px;
  }

  nav ul li a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
  }

  nav ul li a:hover {
    color: var(--primary);
  }

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

  nav ul li a:hover::after {
    width: 100%;
  }

  .hero {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    overflow: hidden;
    margin-bottom: 60px;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(33,150,243,0.8) 0%, rgba(224,224,224,0.8) 100%);
    z-index: -1;
  }

  .hero-content {
    max-width: 600px;
    color: var(--light);
  }

  .hero h1 {
    font-size: 42px;
    margin-bottom: 20px;
    line-height: 1.2;
  }

  .hero p {
    font-size: 18px;
    margin-bottom: 30px;
  }

  .btn {
    display: inline-block;
    padding: 12px 24px;
    background: var(--accent);
    color: var(--dark);
    text-decoration: none;
    border-radius: var(--radius);
    font-weight: bold;
    transition: var(--transition);
    border: none;
    cursor: pointer;
  }

  .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
  }

  .line-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    overflow: hidden;
  }

  .line {
    position: absolute;
    width: 1px;
    height: 100%;
    background: rgba(255,255,255,0.3);
    animation: moveLine 8s linear infinite;
  }

  @keyframes moveLine {
    from {
      transform: translateX(-100%);
    }
    to {
      transform: translateX(100%);
    }
  }

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

  .section-title h2 {
    font-size: 32px;
    color: var(--primary);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
  }

  .section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--accent);
  }

  .section-title p {
    max-width: 700px;
    margin: 0 auto;
    color: var(--text);
  }

  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
  }

  .card {
    background: var(--light);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 30px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
  }

  .card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius);
    margin-bottom: 20px;
    transition: var(--transition);
  }

  .card:hover img {
    transform: scale(1.05);
  }

  .card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--primary);
  }

  .card p {
    margin-bottom: 20px;
  }

  .card .btn {
    padding: 8px 16px;
    font-size: 14px;
  }

  .feature {
    display: flex;
    align-items: center;
    margin-bottom: 40px;
    background: var(--light);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
  }

  .feature:nth-child(even) {
    flex-direction: row-reverse;
  }

  .feature-img {
    flex: 1;
    min-height: 300px;
    background-size: cover;
    background-position: center;
  }

  .feature-content {
    flex: 1;
    padding: 40px;
  }

  .feature h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--primary);
  }

  .feature p {
    margin-bottom: 20px;
  }

  .code-container {
    background: #f5f5f5;
    border-radius: var(--radius);
    padding: 20px;
    margin: 30px 0;
    overflow: auto;
  }

  pre {
    margin: 0;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.5;
    color: #333;
  }

  code {
    font-family: 'Courier New', monospace;
    background: #f5f5f5;
    padding: 2px 4px;
    border-radius: 4px;
    font-size: 14px;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    box-shadow: var(--shadow);
    border-radius: var(--radius);
    overflow: hidden;
  }

  th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--secondary);
  }

  th {
    background: var(--primary);
    color: var(--light);
    font-weight: bold;
  }

  tr:nth-child(even) {
    background: rgba(224,224,224,0.3);
  }

  tr:hover {
    background: rgba(33,150,243,0.1);
  }

  footer {
    background: var(--dark);
    color: var(--light);
    padding: 60px 0 20px;
    margin-top: 60px;
  }

  .footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
  }

  .footer-column h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--accent);
  }

  .footer-column ul {
    list-style: none;
  }

  .footer-column ul li {
    margin-bottom: 10px;
  }

  .footer-column ul li a {
    color: var(--light);
    text-decoration: none;
    transition: var(--transition);
  }

  .footer-column ul li a:hover {
    color: var(--accent);
    padding-left: 5px;
  }

  .copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
  }

  .notice {
    background: var(--accent);
    color: var(--dark);
    padding: 10px;
    text-align: center;
    font-weight: bold;
    margin-bottom: 30px;
    border-radius: var(--radius);
  }

  @media (max-width: 768px) {
    .hero {
      height: auto;
      padding: 100px 0;
    }
    
    .hero h1 {
      font-size: 32px;
    }
    
    .feature {
      flex-direction: column;
    }
    
    .feature:nth-child(even) {
      flex-direction: column;
    }
    
    .feature-img {
      min-height: 200px;
      width: 100%;
    }
    
    nav ul {
      display: none;
    }
  }

  @media (max-width: 480px) {
    .hero h1 {
      font-size: 28px;
    }
    
    .section-title h2 {
      font-size: 26px;
    }
    
    .grid {
      grid-template-columns: 1fr;
    }
  }

  /* Additional animations */
  @keyframes fadeIn {
    from {
      opacity: 0;
      transform: translateY(20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .fade-in {
    animation: fadeIn 1s ease forwards;
  }

  .delay-1 {
    animation-delay: 0.2s;
  }

  .delay-2 {
    animation-delay: 0.4s;
  }

  .delay-3 {
    animation-delay: 0.6s;
  }

  .delay-4 {
    animation-delay: 0.8s;
  }