:root {
    --primary: rgba(10, 25, 47, 0.9);
    --secondary: rgba(58, 123, 213, 0.8);
    --accent: rgba(255, 165, 0, 0.9);
    --text: rgba(255, 255, 255, 0.85);
    --bg: linear-gradient(135deg, var(--primary), var(--secondary));
    --card-bg: rgba(255, 255, 255, 0.1);
    --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

  @font-face {
    font-family: 'Roboto';
    src: local('Roboto Bold'), local('Roboto-Bold');
    font-weight: 700;
  }

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

  body {
    font-family: 'Helvetica', 'Arial', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100%;
    padding-top: 80px;
  }

  .header-notice {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    padding: 15px;
    text-align: center;
    font-size: 14px;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }

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

  .hero {
    min-height: 500px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    margin-bottom: 60px;
    border-radius: 20px;
    background: rgba(0,0,0,0.2);
    backdrop-filter: blur(5px);
    padding: 40px;
  }

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

  @keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }

  .hero-content {
    max-width: 800px;
    position: relative;
    z-index: 2;
  }

  h1, h2, h3, h4 {
    font-family: 'Roboto', sans-serif;
    margin-bottom: 1.5rem;
    font-weight: 700;
    line-height: 1.3;
  }

  h1 {
    font-size: 3rem;
    background: linear-gradient(90deg, #fff, #aaa);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 1rem;
  }

  h2 {
    font-size: 2.2rem;
    margin-top: 3rem;
    position: relative;
    padding-bottom: 1rem;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: var(--accent);
    border-radius: 3px;
  }

  h3 {
    font-size: 1.8rem;
    margin-top: 2.5rem;
    color: rgba(255,255,255,0.9);
  }

  p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text);
  }

  a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
  }

  a:hover {
    text-decoration: underline;
    opacity: 0.8;
  }

  .card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 30px;
    margin: 30px 0;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    transition: var(--transition);
  }

  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.25);
  }

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

  .image-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    height: 300px;
    transition: var(--transition);
  }

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

  .image-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 60%, rgba(0,0,0,0.7));
  }

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

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

  pre {
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
    padding: 20px;
    margin: 25px 0;
    overflow: auto;
    border-left: 4px solid var(--accent);
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.5;
    position: relative;
  }

  pre::before {
    content: 'CSS';
    position: absolute;
    top: 0;
    right: 0;
    background: var(--accent);
    color: #000;
    padding: 2px 10px;
    font-size: 0.8rem;
    border-bottom-left-radius: 4px;
  }

  code {
    font-family: 'Courier New', monospace;
    background: rgba(0,0,0,0.2);
    padding: 2px 5px;
    border-radius: 3px;
    font-size: 0.9rem;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 25px 0;
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(5px);
    border-radius: 8px;
    overflow: hidden;
  }

  th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }

  th {
    background: rgba(255,255,255,0.1);
    font-weight: bold;
  }

  tr:hover {
    background: rgba(255,255,255,0.05);
  }

  ol, ul {
    margin: 20px 0;
    padding-left: 30px;
  }

  li {
    margin-bottom: 10px;
  }

  .nav-links {
    position: fixed;
    top: 100px;
    right: 20px;
    background: rgba(10, 25, 47, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    z-index: 999;
    display: none;
  }

  .nav-links a {
    display: block;
    padding: 8px 0;
    color: #fff;
    transition: var(--transition);
  }

  .nav-links a:hover {
    color: var(--accent);
    transform: translateX(5px);
  }

  .scroll-indicator {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: var(--transition);
    z-index: 998;
    box-shadow: 0 4px 15px rgba(255,165,0,0.3);
  }

  .scroll-indicator.visible {
    opacity: 1;
  }

  .scroll-indicator:hover {
    transform: scale(1.1);
  }

  .section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
  }

  .section.visible {
    opacity: 1;
    transform: translateY(0);
  }

  @media (max-width: 768px) {
    h1 {
      font-size: 2.2rem;
    }
    
    h2 {
      font-size: 1.8rem;
    }
    
    h3 {
      font-size: 1.5rem;
    }
    
    .hero {
      padding: 30px 20px;
      min-height: 400px;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
    
    .nav-links {
      display: none !important;
    }
  }

  @media (max-width: 480px) {
    body {
      padding-top: 60px;
    }
    
    .header-notice {
      font-size: 12px;
      padding: 10px;
    }
    
    h1 {
      font-size: 1.8rem;
    }
    
    h2 {
      font-size: 1.5rem;
    }
    
    pre {
      padding: 15px;
      font-size: 0.85rem;
    }
  }