:root {
    --primary: #1E90FF;
    --secondary: #FFA500;
    --accent: #FFD700;
    --bg-gradient: linear-gradient(135deg, #f0f0f0 0%, #d9d9d9 100%);
    --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --text-main: #333;
    --text-light: #666;
  }

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

  @font-face {
    font-family: 'Montserrat';
    src: local('Montserrat'), url(https://fonts.gstatic.com/s/montserrat/v25/JTUSjIg1_i6t8kCHKm459Wlhyw.woff2) format('woff2');
  }

  @font-face {
    font-family: 'Roboto';
    src: local('Roboto'), url(https://fonts.gstatic.com/s/roboto/v30/KFOmCnqEu92Fr1Mu4mxK.woff2) format('woff2');
  }

  body {
    background: var(--bg-gradient);
    font-family: 'Roboto', sans-serif;
    color: var(--text-main);
    line-height: 1.7;
    overflow-x: hidden;
  }

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

  header {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
  }

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

  .logo {
    font-family: 'Montserrat', sans-serif;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
  }

  .logo::before {
    content: "";
    display: inline-block;
    width: 12px;
    height: 12px;
    background: var(--secondary);
    border-radius: 50%;
    margin-right: 10px;
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.7; }
    100% { transform: scale(1); opacity: 1; }
  }

  .notice {
    background: var(--primary);
    color: white;
    padding: 12px 20px;
    border-radius: 6px;
    font-size: 14px;
    margin: 30px 0;
    text-align: center;
    box-shadow: 0 4px 12px rgba(30, 144, 255, 0.3);
  }

  .hero {
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  .hero::before {
    content: "";
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 215, 0, 0.05) 0%, transparent 70%);
    z-index: -1;
    animation: rotate 60s linear infinite;
  }

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

  h1 {
    font-family: 'Montserrat', sans-serif;
    font-size: 42px;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.3;
  }

  .hero p {
    max-width: 700px;
    margin: 0 auto 40px;
    font-size: 18px;
    color: var(--text-light);
  }

  .hero-images {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 50px;
    flex-wrap: wrap;
  }

  .hero-image {
    width: 320px;
    height: 320px;
    border-radius: 16px;
    object-fit: cover;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
  }

  .hero-image:hover {
    transform: translateY(-10px) scale(1.03);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
  }

  article {
    background: white;
    border-radius: 16px;
    padding: 60px;
    margin: 60px 0;
    box-shadow: var(--card-shadow);
    position: relative;
    overflow: hidden;
  }

  article::after {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(255, 165, 0, 0.1) 0%, transparent 70%);
    z-index: 0;
  }

  h2 {
    font-family: 'Montserrat', sans-serif;
    font-size: 32px;
    margin: 40px 0 20px;
    color: var(--primary);
    position: relative;
    display: inline-block;
  }

  h2::after {
    content: "";
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--secondary);
    border-radius: 2px;
  }

  h3 {
    font-family: 'Montserrat', sans-serif;
    font-size: 24px;
    margin: 30px 0 15px;
    color: var(--primary);
  }

  p {
    margin-bottom: 20px;
    font-size: 17px;
  }

  pre {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 20px;
    margin: 25px 0;
    overflow: auto;
    border-left: 4px solid var(--primary);
    font-size: 15px;
    line-height: 1.5;
    position: relative;
  }

  pre::before {
    content: "CSS";
    position: absolute;
    top: 0;
    right: 0;
    background: var(--primary);
    color: white;
    padding: 2px 10px;
    border-radius: 0 0 0 4px;
    font-size: 12px;
    font-family: 'Roboto', sans-serif;
  }

  code {
    font-family: 'Roboto Mono', monospace;
    color: #333;
  }

  .highlight {
    background: rgba(255, 215, 0, 0.2);
    padding: 0 4px;
    border-radius: 3px;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
  }

  .grid-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
  }

  .grid-image:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  }

  .accordion {
    margin: 30px 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  }

  .accordion-header {
    background: #f8f9fa;
    padding: 15px 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
  }

  .accordion-header:hover {
    background: #e9ecef;
  }

  .accordion-header::after {
    content: "+";
    font-size: 20px;
    transition: transform 0.3s ease;
  }

  .accordion-header.active::after {
    content: "-";
  }

  .accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background: white;
  }

  .accordion-content-inner {
    padding: 20px;
  }

  footer {
    background: var(--primary);
    color: white;
    padding: 40px 0;
    text-align: center;
    margin-top: 80px;
  }

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

  .footer-link {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
  }

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

  @media (max-width: 768px) {
    h1 {
      font-size: 32px;
    }
    
    article {
      padding: 40px 20px;
    }
    
    .hero-images {
      flex-direction: column;
      align-items: center;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }