:root {
    --primary: #1e3c72;
    --secondary: #2a5298;
    --accent: #39FF14;
    --text: #f8f9fa;
    --card-bg: rgba(255, 255, 255, 0.1);
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
  }

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

  body {
    font-family: 'Roboto', 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100%;
    padding-bottom: 120px;
  }

  body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
      radial-gradient(circle at 20% 30%, rgba(46, 204, 113, 0.1) 0%, transparent 40%),
      radial-gradient(circle at 80% 70%, rgba(142, 68, 173, 0.1) 0%, transparent 40%);
    z-index: -1;
    pointer-events: none;
  }

  .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
  }

  .hero {
    height: 80vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
  }

  .hero-content {
    width: 60%;
    z-index: 2;
  }

  .hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(90deg, #fff, #39FF14);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.2;
  }

  .hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
  }

  .hero-decoration {
    position: absolute;
    right: -10%;
    top: 50%;
    transform: translateY(-50%);
    width: 50%;
    height: 80%;
    background: url('https://images.gptkong.com/demo/sample3.png') no-repeat center/contain;
    opacity: 0.8;
    filter: drop-shadow(0 0 20px rgba(57, 255, 20, 0.3));
  }

  .notice {
    background: rgba(0,0,0,0.2);
    padding: 15px;
    border-radius: 8px;
    margin: 30px 0;
    text-align: center;
    border-left: 4px solid var(--accent);
  }

  article {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 20px;
    background: rgba(0,0,0,0.15);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    position: relative;
    overflow: hidden;
  }

  article::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 300px;
    background: url('https://images.gptkong.com/demo/sample6.png') no-repeat center/contain;
    opacity: 0.1;
    z-index: -1;
  }

  h2, h3, h4 {
    margin: 1.5em 0 0.8em;
    position: relative;
  }

  h2 {
    font-size: 2rem;
    color: var(--accent);
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), transparent);
  }

  h3 {
    font-size: 1.6rem;
    color: #fff;
  }

  p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
  }

  pre {
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
    padding: 20px;
    margin: 2rem 0;
    overflow: auto;
    border-left: 4px solid var(--accent);
    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: 8px;
  }

  code {
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
  }

  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 3rem 0;
  }

  .gallery-item {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
    transition: var(--transition);
    position: relative;
  }

  .gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(57, 255, 20, 0.2);
  }

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

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

  .nav-links {
    position: fixed;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 100;
  }

  .nav-link {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    font-size: 1.2rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: var(--transition);
  }

  .nav-link:hover {
    background: var(--accent);
    color: #000;
    transform: scale(1.1);
  }

  footer {
    text-align: center;
    padding: 30px;
    background: rgba(0,0,0,0.3);
    position: fixed;
    bottom: 0;
    width: 100%;
    backdrop-filter: blur(5px);
  }

  @media (max-width: 1024px) {
    .hero-content {
      width: 100%;
      text-align: center;
    }
    .hero-decoration {
      display: none;
    }
    .nav-links {
      display: none;
    }
  }

  @media (max-width: 768px) {
    h2 { font-size: 1.8rem; }
    h3 { font-size: 1.4rem; }
    .hero h1 { font-size: 2.5rem; }
  }

  /* Animations */
  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
  }

  .floating {
    animation: float 6s ease-in-out infinite;
  }