:root {
    --primary: linear-gradient(135deg, #00c6ff, #0072ff);
    --secondary: rgba(0, 198, 255, 0.5);
    --accent: #ff7b25;
    --text: #333333;
    --light: #ffffff;
    --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;
  }

  body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text);
    background-color: #f8fafc;
    overflow-x: hidden;
  }

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

  /* Header Styles */
  header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
    transition: var(--transition);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  }

  header.scrolled {
    background: rgba(255, 255, 255, 0.95);
  }

  .header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
  }

  .logo {
    font-size: 24px;
    font-weight: 700;
    background: var(--primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

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

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

  .nav-links a:hover {
    color: #0072ff;
  }

  .nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
  }

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

  /* Hero Section */
  .hero {
    height: 600px;
    display: flex;
    align-items: center;
    background: var(--primary);
    color: var(--light);
    margin-top: 80px;
    position: relative;
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 70%);
    animation: rotate 20s linear infinite;
  }

  @keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
  }

  .hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: 40px;
  }

  .hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
  }

  .hero p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
  }

  .hero-btn {
    display: inline-block;
    padding: 15px 30px;
    background: var(--light);
    color: #0072ff;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  }

  .hero-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  }

  /* Main Content */
  .main-content {
    padding: 80px 0;
  }

  .section-title {
    text-align: center;
    margin-bottom: 60px;
  }

  .section-title h2 {
    font-size: 36px;
    margin-bottom: 15px;
    background: var(--primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
  }

  .section-title p {
    max-width: 700px;
    margin: 0 auto;
    color: #666;
  }

  /* Article Styles */
  article {
    background: var(--light);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 50px;
    margin-bottom: 60px;
  }

  article h2 {
    font-size: 32px;
    margin-bottom: 30px;
    color: #0072ff;
  }

  article h3 {
    font-size: 24px;
    margin: 40px 0 20px;
    color: #0072ff;
  }

  article p {
    margin-bottom: 20px;
    font-size: 17px;
    line-height: 1.7;
  }

  /* Code Block Styles */
  pre {
    background: #2d2d2d;
    border-radius: var(--radius);
    padding: 20px;
    margin: 30px 0;
    overflow: hidden;
  }

  code {
    font-family: 'Courier New', monospace;
    color: #f8f8f2;
    font-size: 15px;
    line-height: 1.5;
  }

  /* Card Grid */
  .card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 50px 0;
  }

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

  .card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary);
    transition: var(--transition);
  }

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

  .card:hover::before {
    width: 8px;
  }

  .card-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
  }

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

  .card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #0072ff;
  }

  .card p {
    color: #666;
    margin-bottom: 20px;
  }

  /* Image Gallery */
  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin: 50px 0;
  }

  .gallery-item {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
  }

  .gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
  }

  .gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
  }

  .gallery-item:hover img {
    transform: scale(1.05);
  }

  /* Footer */
  footer {
    background: #2d3748;
    color: var(--light);
    padding: 60px 0 30px;
  }

  .footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
  }

  .footer-col h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--accent);
  }

  .footer-col p {
    opacity: 0.8;
    margin-bottom: 15px;
  }

  .footer-links {
    list-style: none;
  }

  .footer-links li {
    margin-bottom: 10px;
  }

  .footer-links a {
    color: var(--light);
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
  }

  .footer-links a:hover {
    opacity: 1;
    color: var(--accent);
  }

  .copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
  }

  /* Responsive */
  @media (max-width: 992px) {
    .hero h1 {
      font-size: 40px;
    }
    
    article {
      padding: 40px;
    }
  }

  @media (max-width: 768px) {
    .nav-links {
      display: none;
    }
    
    .hero {
      height: 500px;
      margin-top: 70px;
    }
    
    .hero h1 {
      font-size: 32px;
    }
    
    .hero p {
      font-size: 18px;
    }
    
    article {
      padding: 30px;
    }
    
    article h2 {
      font-size: 28px;
    }
    
    article h3 {
      font-size: 22px;
    }
  }

  @media (max-width: 576px) {
    .hero {
      height: 450px;
    }
    
    .hero-content {
      padding: 20px;
    }
    
    .hero h1 {
      font-size: 28px;
    }
    
    .section-title h2 {
      font-size: 28px;
    }
    
    article {
      padding: 25px;
    }
  }

  /* Animation */
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .animate {
    animation: fadeIn 0.8s ease forwards;
  }

  .delay-1 { animation-delay: 0.2s; }
  .delay-2 { animation-delay: 0.4s; }
  .delay-3 { animation-delay: 0.6s; }
  .delay-4 { animation-delay: 0.8s; }

  /* Utility */
  .text-center {
    text-align: center;
  }

  .mt-20 { margin-top: 20px; }
  .mt-40 { margin-top: 40px; }
  .mt-60 { margin-top: 60px; }
  .mb-20 { margin-bottom: 20px; }
  .mb-40 { margin-bottom: 40px; }
  .mb-60 { margin-bottom: 60px; }

  .notice {
    background: rgba(0, 198, 255, 0.1);
    border-left: 4px solid #00c6ff;
    padding: 20px;
    margin: 40px 0;
    border-radius: 0 8px 8px 0;
  }

  .notice p {
    margin: 0;
    color: #0072ff;
    font-weight: 500;
  }