:root {
    --primary: #032B44;
    --secondary: #87CEEB;
    --accent: #FFA500;
    --text: #333;
    --light: #fff;
    --shadow: 0 4px 20px rgba(0,0,0,0.1);
    --radius: 12px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Roboto', sans-serif;
  }

  body {
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8eb 100%);
    color: var(--text);
    line-height: 1.6;
    padding-top: 80px;
    overflow-x: hidden;
  }

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

  /* Header */
  .header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--primary);
    color: var(--light);
    padding: 15px 0;
    z-index: 1000;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .logo {
    font-size: 1.8rem;
    font-weight: 700;
    margin-left: 30px;
    background: linear-gradient(to right, var(--accent), #ff8c00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: var(--transition);
  }

  .logo:hover {
    transform: scale(1.05);
  }

  .notice {
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 0.8rem;
    color: var(--secondary);
  }

  /* Navigation */
  .nav-links {
    display: flex;
    gap: 30px;
    margin-right: 30px;
  }

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

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

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

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

  /* Hero Section */
  .hero {
    height: 500px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    margin-bottom: 60px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  }

  .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: 0.1;
  }

  .hero-content {
    position: relative;
    z-index: 1;
    padding: 0 60px;
    max-width: 600px;
    color: var(--light);
  }

  .hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    line-height: 1.2;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
  }

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

  /* Article */
  article {
    background: var(--light);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px;
    margin-bottom: 60px;
  }

  article h2 {
    color: var(--primary);
    font-size: 2rem;
    margin: 40px 0 20px;
    position: relative;
    padding-bottom: 10px;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--accent);
  }

  article h3 {
    color: var(--primary);
    font-size: 1.5rem;
    margin: 30px 0 15px;
  }

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

  /* Code Blocks */
  pre {
    background: #282c34;
    border-radius: 8px;
    padding: 20px;
    margin: 25px 0;
    overflow: auto;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.5);
  }

  code {
    font-family: 'Fira Code', monospace;
    color: #abb2bf;
    font-size: 0.9rem;
  }

  .language-css {
    color: #e06c75;
  }

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

  .gallery img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
  }

  .gallery img:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
  }

  /* Cards */
  .cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin: 40px 0;
  }

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

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

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

  /* Footer */
  footer {
    background: var(--primary);
    color: var(--light);
    padding: 40px 0;
    text-align: center;
  }

  .footer-content {
    max-width: 800px;
    margin: 0 auto;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 20px 0;
  }

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

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

  /* Responsive */
  @media (max-width: 768px) {
    .nav-links {
      display: none;
    }

    .hero {
      height: 400px;
    }

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

    article {
      padding: 30px 20px;
    }

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

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

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