:root {
    --primary: #1A237E;
    --primary-light: #64B5F6;
    --accent: #4CAF50;
    --accent-light: #66BB6A;
    --text: #FFFFFF;
    --bg: #0A0F3D;
    --card-bg: rgba(255, 255, 255, 0.1);
    --transition: all 0.3s ease;
  }

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

  body {
    background: linear-gradient(135deg, var(--primary), var(--bg));
    color: var(--text);
    font-family: 'Roboto', 'Helvetica', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
  }

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

  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 70% 30%, rgba(100, 181, 246, 0.2) 0%, transparent 50%);
    z-index: -1;
  }

  .hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(90deg, #FFFFFF, #64B5F6);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(26, 35, 126, 0.3);
  }

  .hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin-bottom: 2rem;
    opacity: 0.9;
  }

  .notice {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 15px 25px;
    border-radius: 50px;
    margin-top: 2rem;
    font-size: 0.9rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  }

  .navbar {
    position: fixed;
    top: 0;
    width: 100%;
    height: 70px;
    background-color: rgba(26, 35, 126, 0.95);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5%;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    backdrop-filter: blur(5px);
  }

  .navbar .logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .navbar .menu {
    display: flex;
    gap: 30px;
  }

  .navbar .menu a {
    color: var(--text);
    text-decoration: none;
    font-size: 1rem;
    transition: var(--transition);
    position: relative;
    padding: 5px 0;
  }

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

  .navbar .menu a:hover::after {
    width: 100%;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 5% 50px;
  }

  article {
    background: rgba(10, 15, 61, 0.7);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  article h2 {
    font-size: 2rem;
    margin: 2rem 0 1.5rem;
    color: var(--accent-light);
    position: relative;
    padding-left: 20px;
  }

  article h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 5px;
    height: 70%;
    background: var(--accent);
    border-radius: 5px;
  }

  article h3 {
    font-size: 1.5rem;
    margin: 1.5rem 0 1rem;
    color: var(--primary-light);
  }

  article p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    line-height: 1.7;
  }

  pre {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    padding: 20px;
    margin: 1.5rem 0;
    overflow: auto;
    border-left: 3px solid var(--accent);
  }

  code {
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    color: #E6DB74;
  }

  .code-block {
    position: relative;
  }

  .code-block::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 40px;
    height: 40px;
    background: url('https://images.gptkong.com/demo/sample6.png') no-repeat center;
    background-size: contain;
    opacity: 0.3;
  }

  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 2rem 0;
  }

  .gallery img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  }

  .gallery img:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  }

  .card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 25px;
    margin: 2rem 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
  }

  .card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
      to bottom right,
      rgba(100, 181, 246, 0.1),
      transparent 70%
    );
    transform: rotate(30deg);
    z-index: -1;
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    border-color: rgba(100, 181, 246, 0.3);
  }

  .footer {
    text-align: center;
    padding: 30px;
    background: rgba(10, 15, 61, 0.8);
    margin-top: 50px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  @media (max-width: 768px) {
    .hero h1 {
      font-size: 2.5rem;
    }
    
    .navbar .menu {
      gap: 15px;
    }
    
    article {
      padding: 25px;
    }
  }

  @media (max-width: 480px) {
    .hero h1 {
      font-size: 2rem;
    }
    
    .navbar {
      padding: 0 20px;
    }
    
    .navbar .menu {
      gap: 10px;
    }
  }