:root {
    --primary-color: #002B5B; /* 深蓝色 */
    --secondary-color: #FFFFFF; /* 冷白色 */
    --accent-color: #6F00FF; /* 霓虹紫 */
    --highlight-color: #00AFFF; /* 电光蓝 */
    --background-gradient: linear-gradient(135deg, #002B5B, #6F00FF, #00AFFF);
    --font-primary: 'Open Sans', sans-serif;
    --font-mono: 'Roboto Mono', monospace;
    --transition-speed: 0.3s;
  }

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

  body {
    font-family: var(--font-primary);
    background: var(--background-gradient);
    color: var(--secondary-color);
    line-height: 1.6;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  header {
    width: 100%;
    background: rgba(0, 43, 91, 0.8);
    padding: 20px 40px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  header .logo {
    font-family: var(--font-mono);
    font-size: 1.5em;
    color: var(--highlight-color);
  }

  nav a {
    color: var(--secondary-color);
    text-decoration: none;
    margin: 0 15px;
    transition: color var(--transition-speed);
  }

  nav a:hover {
    color: var(--highlight-color);
  }

  .floating-nav {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--accent-color);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: transform var(--transition-speed);
  }

  .floating-nav:hover {
    transform: scale(1.1);
  }

  main {
    max-width: 1200px;
    width: 100%;
    padding: 100px 20px 20px 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .content {
    grid-column: 1 / -1;
  }

  article {
    background: rgba(0, 43, 91, 0.9);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  }

  article h2, article h3 {
    color: var(--highlight-color);
    font-family: var(--font-mono);
    margin-bottom: 10px;
  }

  article h2 {
    font-size: 2em;
    text-align: center;
  }

  article h3 {
    font-size: 1.5em;
    margin-top: 20px;
  }

  article p {
    margin-bottom: 15px;
    font-size: 1em;
  }

  article pre {
    background: #1E1E1E;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 15px;
  }

  article code {
    font-family: var(--font-mono);
    color: #FFD700;
  }

  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 10px;
  }

  .gallery img {
    width: 100%;
    height: auto;
    border-radius: 5px;
  }

  .sample-data {
    grid-column: 1 / -1;
    background: rgba(0, 43, 91, 0.8);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  }

  .sample-data h2 {
    text-align: center;
    margin-bottom: 15px;
    color: var(--highlight-color);
  }

  .sample-data ul {
    list-style: none;
  }

  .sample-data li {
    background: rgba(255, 255, 255, 0.1);
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 5px;
    transition: background var(--transition-speed);
  }

  .sample-data li:hover {
    background: rgba(255, 255, 255, 0.2);
  }

  footer {
    width: 100%;
    background: rgba(0, 43, 91, 0.8);
    padding: 20px 40px;
    text-align: center;
    color: var(--secondary-color);
    margin-top: 20px;
    position: relative;
  }

  @media (max-width: 1440px) {
    main {
      max-width: 1000px;
    }
  }

  @media (max-width: 1200px) {
    main {
      max-width: 900px;
    }
  }

  @media (max-width: 1024px) {
    main {
      grid-template-columns: 1fr;
    }
  }

  @media (max-width: 768px) {
    header {
      flex-direction: column;
      align-items: flex-start;
    }

    nav {
      margin-top: 10px;
    }
  }

  @media (max-width: 480px) {
    .gallery {
      grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }

    article h2 {
      font-size: 1.5em;
    }

    article h3 {
      font-size: 1.2em;
    }
  }

  @media (max-width: 320px) {
    main {
      padding: 80px 10px 10px 10px;
    }

    .floating-nav {
      width: 40px;
      height: 40px;
    }
  }

  /* Additional Styles for Visual Effects */
  .particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background: radial-gradient(circle, rgba(255,255,255,0.1), transparent);
    z-index: -1;
  }

  .particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--highlight-color);
    border-radius: 50%;
    animation: move 5s infinite linear;
  }

  @keyframes move {
    from { transform: translateY(0); }
    to { transform: translateY(-100vh); }
  }

  .glow-text {
    font-family: var(--font-mono);
    font-weight: bold;
    background: linear-gradient(90deg, var(--primary-color), var(--highlight-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: glow 3s infinite alternate;
  }

  @keyframes glow {
    from { text-shadow: 0 0 10px var(--highlight-color); }
    to { text-shadow: 0 0 20px var(--highlight-color); }
  }