:root {
    --primary: #0f0c29;
    --secondary: #302b63;
    --accent: #00f0ff;
    --text: #ffffff;
    --highlight: rgba(0, 240, 255, 0.2);
    --card-bg: rgba(26, 26, 26, 0.9);
    --border-radius: 12px;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  }

  @font-face {
    font-family: 'Roboto';
    src: url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');
  }

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

  body {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--text);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    padding-top: 80px;
  }

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

  header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(15, 12, 41, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    z-index: 1000;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid var(--accent);
  }

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

  .logo {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--accent), #00a8ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
  }

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

  .nav-links a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    padding: 5px 0;
    transition: all 0.3s ease;
  }

  .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 {
    color: var(--accent);
  }

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

  .hero {
    height: 500px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    margin-bottom: 80px;
  }

  .hero-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
  }

  .hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(90deg, #fff, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

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

  .hero-bg {
    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-decor {
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.1), transparent 70%);
    filter: blur(30px);
    z-index: 0;
  }

  .decor-1 {
    top: -100px;
    right: -100px;
  }

  .decor-2 {
    bottom: -150px;
    left: -150px;
    width: 400px;
    height: 400px;
  }

  .card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
  }

  .card h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--accent);
    position: relative;
    padding-bottom: 10px;
  }

  .card h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--accent);
  }

  .card p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    opacity: 0.9;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }

  .image-card {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    height: 300px;
    transition: transform 0.3s ease;
  }

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

  .image-card:hover {
    transform: translateY(-10px);
  }

  .image-card:hover img {
    transform: scale(1.1);
  }

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

  .code-block {
    background: #1a1a2e;
    border-radius: var(--border-radius);
    padding: 20px;
    margin: 30px 0;
    overflow-x: auto;
    border-left: 4px solid var(--accent);
    box-shadow: var(--shadow);
  }

  .code-block pre {
    margin: 0;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    color: #e0e0e0;
  }

  .code-block .keyword {
    color: #569cd6;
  }

  .code-block .string {
    color: #ce9178;
  }

  .code-block .comment {
    color: #6a9955;
  }

  .code-block .property {
    color: #9cdcfe;
  }

  .footer-note {
    text-align: center;
    padding: 20px;
    margin-top: 80px;
    font-size: 0.9rem;
    opacity: 0.7;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

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

    .nav-links {
      gap: 15px;
    }

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