:root {
    --primary-gradient: linear-gradient(135deg, #8e2de2, #4a00e0, #00c6ff, #7F00FF);
    --secondary-gradient: linear-gradient(45deg, #ff6ec4, #7873f5);
    --dark-bg: #121212;
    --light-bg: #ffffff;
    --text-dark: #333;
    --text-light: #f5f5f5;
    --accent: #bb86fc;
    --card-bg: rgba(255, 255, 255, 0.85);
    --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', 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--light-bg);
    overflow-x: hidden;
    min-height: 100%;
  }

  .aurora-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    background-size: 400% 400%;
    animation: gradientAnimation 15s ease infinite;
    z-index: -2;
    opacity: 0.9;
  }

  @keyframes gradientAnimation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }

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

  header {
    position: relative;
    padding: 2rem 0;
    text-align: center;
  }

  .header-content {
    background: rgba(255, 255, 255, 0.9);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(5px);
    max-width: 800px;
    margin: 0 auto;
  }

  h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 700;
  }

  .subtitle {
    font-size: 1.2rem;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
  }

  .notice {
    background: rgba(255, 255, 255, 0.9);
    padding: 1rem;
    border-radius: 8px;
    margin: 2rem auto;
    max-width: 600px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    font-size: 0.9rem;
  }

  nav {
    position: sticky;
    top: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    z-index: 100;
    transition: var(--transition);
  }

  nav.scrolled {
    background: rgba(0, 0, 0, 0.9);
  }

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

  .nav-links {
    display: flex;
    gap: 1.5rem;
  }

  .nav-links a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: 20px;
  }

  .nav-links a:hover {
    background: rgba(255, 255, 255, 0.2);
  }

  main {
    padding: 3rem 0;
  }

  article {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 2.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 3rem;
  }

  h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: #4a00e0;
    position: relative;
    padding-bottom: 0.5rem;
  }

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

  h3 {
    font-size: 1.4rem;
    margin: 1.5rem 0 1rem;
    color: #8e2de2;
  }

  p {
    margin-bottom: 1.2rem;
    font-size: 1.05rem;
    line-height: 1.7;
  }

  .img-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
  }

  .img-card {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
  }

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

  .img-card img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
  }

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

  pre {
    background: rgba(0, 0, 0, 0.85);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    overflow: auto;
    color: #f8f8f2;
    font-family: 'Fira Code', monospace;
    font-size: 0.95rem;
    line-height: 1.5;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  }

  code {
    font-family: 'Fira Code', monospace;
    background: rgba(0, 0, 0, 0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9rem;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    background: var(--card-bg);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    overflow: hidden;
  }

  th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  }

  th {
    background: rgba(142, 45, 226, 0.1);
    font-weight: 600;
  }

  tr:hover {
    background: rgba(142, 45, 226, 0.05);
  }

  footer {
    background: rgba(0, 0, 0, 0.8);
    color: var(--text-light);
    padding: 2rem 0;
    text-align: center;
    margin-top: 3rem;
  }

  .back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--secondary-gradient);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 99;
  }

  .back-to-top.visible {
    opacity: 1;
    visibility: visible;
  }

  .back-to-top:hover {
    transform: translateY(-5px);
  }

  @media (max-width: 768px) {
    .nav-container {
      flex-direction: column;
      gap: 1rem;
    }

    .nav-links {
      flex-wrap: wrap;
      justify-content: center;
    }

    article {
      padding: 1.5rem;
    }

    h1 {
      font-size: 2rem;
    }

    h2 {
      font-size: 1.5rem;
    }
  }