:root {
    --primary: linear-gradient(135deg, #0d47a1, #1a237e);
    --accent: #00e6e6;
    --text: #ffffff;
    --card-bg: rgba(255, 255, 255, 0.1);
    --nav-bg: rgba(0, 0, 0, 0.5);
    --shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
  }

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

  body {
    background: var(--primary);
    color: var(--text);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
  }

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

  /* Header Styles */
  header {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 0;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
  }

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

  .logo {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--accent), #ffffff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 10px rgba(0, 230, 230, 0.3);
  }

  .notice {
    position: fixed;
    top: 80px;
    right: 20px;
    background: rgba(0,0,0,0.7);
    padding: 10px 15px;
    border-radius: 5px;
    font-size: 0.9rem;
    z-index: 1000;
    backdrop-filter: blur(5px);
    border-left: 3px solid var(--accent);
  }

  /* Hero Section */
  .hero {
    height: 80vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    margin-top: 80px;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png') center/cover no-repeat;
    opacity: 0.2;
    z-index: -1;
  }

  .hero-content {
    max-width: 600px;
  }

  .hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(to right, #ffffff, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
  }

  /* Article Styles */
  article {
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 40px;
    margin: 40px 0;
    box-shadow: var(--shadow);
  }

  article h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--accent);
    position: relative;
    padding-bottom: 10px;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: var(--accent);
  }

  article h3 {
    font-size: 1.5rem;
    margin: 30px 0 15px;
    color: #ffffff;
  }

  article p {
    margin-bottom: 20px;
    font-size: 1.1rem;
  }

  /* Code Block Styles */
  pre {
    background: rgba(0, 0, 0, 0.5);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    overflow: auto;
    border-left: 3px solid var(--accent);
  }

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

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

  .card {
    background: var(--card-bg);
    border-radius: 10px;
    padding: 25px;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255,255,255,0.1);
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 230, 230, 0.3);
    border-color: var(--accent);
  }

  .card img {
    width: 100%;
    border-radius: 8px;
    margin-bottom: 15px;
    transition: transform 0.3s ease;
  }

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

  .card h4 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--accent);
  }

  /* Gallery Section */
  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }

  .gallery-item {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    height: 250px;
  }

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

  .gallery-item:hover img {
    transform: scale(1.1);
  }

  .gallery-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
  }

  /* Footer */
  footer {
    background: rgba(0, 0, 0, 0.7);
    padding: 30px 0;
    text-align: center;
    margin-top: 60px;
    backdrop-filter: blur(10px);
  }

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

  .footer-links a {
    color: var(--text);
    text-decoration: none;
    transition: color 0.3s ease;
  }

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

  .copyright {
    opacity: 0.7;
    font-size: 0.9rem;
  }

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

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

  @keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
  }

  .pulse {
    animation: pulse 2s ease-in-out infinite;
  }

  /* Responsive Design */
  @media (max-width: 768px) {
    .hero h1 {
      font-size: 2.2rem;
    }

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

    article {
      padding: 25px;
    }

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

  @media (max-width: 480px) {
    .hero h1 {
      font-size: 1.8rem;
    }

    article h2 {
      font-size: 1.5rem;
    }

    article h3 {
      font-size: 1.2rem;
    }
  }