:root {
    --primary: #1E90FF;
    --secondary: #C0C0C0;
    --accent: #7CFC00;
    --dark: #0A192F;
    --light: #F8F9FA;
  }

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

  body {
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, var(--dark), #162A47);
    color: var(--light);
    line-height: 1.6;
    overflow-x: hidden;
  }

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

  .header {
    position: relative;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(rgba(10, 25, 47, 0.8), rgba(10, 25, 47, 0.8)), 
                url('https://images.gptkong.com/demo/sample1.png') center/cover no-repeat;
    margin-bottom: 80px;
    border-radius: 0 0 20px 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  }

  .header-content {
    max-width: 800px;
    padding: 40px;
    background: rgba(30, 144, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    border: 1px solid rgba(124, 252, 0, 0.2);
    transform: translateY(50px);
    animation: fadeIn 1.5s ease-out forwards;
  }

  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(50px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .header h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(to right, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(30, 144, 255, 0.3);
  }

  .header p {
    font-size: 1.2rem;
    margin-bottom: 30px;
  }

  .notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(30, 144, 255, 0.9);
    color: white;
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 0.9rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
  }

  .navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 25, 47, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(124, 252, 0, 0.1);
  }

  .navbar.scrolled {
    background: rgba(10, 25, 47, 0.95);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
  }

  .nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    max-width: 1200px;
    margin: 0 auto;
  }

  .nav-logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent);
    text-decoration: none;
  }

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

  .nav-links a {
    color: var(--light);
    text-decoration: none;
    font-size: 1rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 5px 0;
  }

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

  .nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
  }

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

  article {
    padding: 60px 0;
    max-width: 900px;
    margin: 0 auto;
  }

  article h2 {
    font-size: 2.2rem;
    margin-bottom: 30px;
    color: var(--primary);
    position: relative;
    padding-bottom: 15px;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: linear-gradient(to right, var(--primary), var(--accent));
    border-radius: 3px;
  }

  article h3 {
    font-size: 1.8rem;
    margin: 40px 0 20px;
    color: var(--accent);
  }

  article p {
    font-size: 1.1rem;
    margin-bottom: 25px;
    line-height: 1.8;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
  }

  .image-card {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
  }

  .image-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
  }

  .image-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }

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

  .image-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(30, 144, 255, 0.1), rgba(10, 25, 47, 0.7));
  }

  pre {
    background: rgba(10, 25, 47, 0.7);
    border-radius: 10px;
    padding: 20px;
    margin: 30px 0;
    overflow-x: auto;
    border-left: 4px solid var(--accent);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.5;
  }

  code {
    color: var(--accent);
    font-family: 'Courier New', monospace;
  }

  .highlight {
    color: var(--accent);
    font-weight: bold;
  }

  .section-divider {
    height: 1px;
    background: linear-gradient(to right, transparent, var(--primary), transparent);
    margin: 60px 0;
    border: none;
  }

  .floating-element {
    position: absolute;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: rgba(124, 252, 0, 0.1);
    filter: blur(30px);
    z-index: -1;
    animation: float 6s ease-in-out infinite;
  }

  @keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
  }

  .floating-element:nth-child(1) {
    top: 20%;
    left: 10%;
    width: 150px;
    height: 150px;
    animation-delay: 0s;
  }

  .floating-element:nth-child(2) {
    top: 60%;
    right: 15%;
    width: 120px;
    height: 120px;
    animation-delay: 1s;
  }

  .floating-element:nth-child(3) {
    bottom: 10%;
    left: 20%;
    width: 80px;
    height: 80px;
    animation-delay: 2s;
  }

  @media (max-width: 768px) {
    .header {
      height: 500px;
    }

    .header h1 {
      font-size: 2.2rem;
    }

    .header p {
      font-size: 1rem;
    }

    .nav-links {
      gap: 15px;
    }

    article h2 {
      font-size: 1.8rem;
    }

    article h3 {
      font-size: 1.5rem;
    }

    .image-grid {
      grid-template-columns: 1fr;
    }
  }

  @media (max-width: 480px) {
    .header {
      height: 400px;
    }

    .header h1 {
      font-size: 1.8rem;
    }

    .nav-container {
      flex-direction: column;
      gap: 15px;
    }

    .nav-links {
      flex-wrap: wrap;
      justify-content: center;
    }
  }