:root {
    --primary: linear-gradient(135deg, #1E3C72 0%, #2A5298 50%, #6A5ACD 100%);
    --secondary: linear-gradient(145deg, #4B0082 0%, #8A2BE2 100%);
    --accent: #32CD32;
    --text-light: #F0F8FF;
    --text-dark: #1E1E2C;
    --shadow: 0 4px 20px rgba(0,0,0,0.15);
    --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

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

  body {
    font-family: 'Roboto', sans-serif;
    background: var(--primary);
    color: var(--text-light);
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100%;
    padding: 0 5%;
  }

  .design-notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(10px);
    padding: 12px 24px;
    border-radius: 50px;
    font-size: 14px;
    z-index: 100;
    box-shadow: var(--shadow);
    animation: float 6s ease-in-out infinite;
  }

  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
  }

  .hero {
    min-height: 600px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    margin: 40px 0;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(46,204,113,0.1) 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;
    padding: 40px;
    background: rgba(30, 60, 114, 0.5);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
  }

  .hero-content::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent 45%, rgba(106,90,205,0.1) 50%, transparent 55%);
    animation: shine 8s infinite;
    z-index: -1;
  }

  @keyframes shine {
    0% { transform: translate(-30%, -30%) rotate(0deg); }
    100% { transform: translate(30%, 30%) rotate(360deg); }
  }

  h1, h2, h3 {
    font-weight: 700;
    margin: 30px 0 20px;
    position: relative;
  }

  h2 {
    font-size: 2.2rem;
    background: var(--secondary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
    padding-bottom: 10px;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--secondary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.6s ease;
  }

  h2:hover::after {
    transform: scaleX(1);
  }

  h3 {
    font-size: 1.8rem;
    color: var(--accent);
    margin-top: 40px;
  }

  p {
    font-size: 1.1rem;
    margin: 20px 0;
    max-width: 800px;
  }

  article {
    max-width: 1000px;
    margin: 0 auto 80px;
    padding: 40px;
    background: rgba(30, 60, 114, 0.3);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
  }

  article::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample5.png') no-repeat;
    background-size: 30%;
    background-position: right bottom;
    opacity: 0.1;
    z-index: -1;
  }

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

  .image-card {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
  }

  .image-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
  }

  .image-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
    transition: var(--transition);
  }

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

  .image-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(30,60,114,0.7) 0%, transparent 50%);
    z-index: 1;
  }

  pre {
    background: rgba(20, 20, 30, 0.7);
    border-radius: 10px;
    padding: 20px;
    margin: 25px 0;
    overflow-x: auto;
    box-shadow: var(--shadow);
    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: white;
    padding: 2px 10px;
    border-radius: 0 0 0 5px;
    font-size: 0.8rem;
    font-weight: bold;
  }

  code {
    color: #7CFC00;
    font-family: 'Courier New', monospace;
  }

  .nav-links {
    position: fixed;
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 90;
  }

  .nav-link {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    border: 2px solid transparent;
    transition: var(--transition);
    cursor: pointer;
  }

  .nav-link.active, .nav-link:hover {
    background: var(--accent);
    transform: scale(1.3);
    border-color: white;
  }

  @media (max-width: 768px) {
    body {
      padding: 0 20px;
    }
    
    .hero {
      min-height: 400px;
    }
    
    h2 {
      font-size: 1.8rem;
    }
    
    h3 {
      font-size: 1.5rem;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
    
    .nav-links {
      display: none;
    }
  }