@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;700&family=Roboto:wght@300;400;500&display=swap');
  
  :root {
    --primary: #0a0a23;
    --secondary: #1e3c72;
    --accent: #ff9900;
    --neon-blue: #00f0ff;
    --neon-purple: #8e2de2;
    --text-light: rgba(255,255,255,0.9);
    --text-muted: rgba(255,255,255,0.6);
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Roboto', sans-serif;
    font-size: 17px;
    line-height: 1.7;
    color: var(--text-light);
    background: var(--primary);
    overflow-x: hidden;
  }
  
  .design-notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0,0,0,0.7);
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 14px;
    z-index: 1000;
    backdrop-filter: blur(5px);
    border: 1px solid var(--neon-blue);
    box-shadow: 0 0 15px rgba(0,240,255,0.3);
  }
  
  .hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    background: radial-gradient(ellipse at center, #1e3c72 0%, #0a0a23 70%);
    position: relative;
    overflow: hidden;
    padding: 0 5%;
  }
  
  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample3.png') no-repeat;
    background-size: 40%;
    background-position: right center;
    opacity: 0.2;
  }
  
  .hero-content {
    max-width: 600px;
    position: relative;
    z-index: 2;
  }
  
  .hero h1 {
    font-family: 'Montserrat', sans-serif;
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(90deg, #ff9900, #ff4d00);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.2;
    text-transform: uppercase;
    letter-spacing: 2px;
  }
  
  .hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: var(--text-muted);
  }
  
  .scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
  }
  
  @keyframes bounce {
    0%, 20%, 50%, 80%, 100% {transform: translateY(0) translateX(-50%);}
    40% {transform: translateY(-20px) translateX(-50%);}
    60% {transform: translateY(-10px) translateX(-50%);}
  }
  
  .main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 5%;
  }
  
  article {
    background: rgba(10,10,35,0.7);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 60px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.3);
    position: relative;
    overflow: hidden;
  }
  
  article::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(30,60,114,0.3), rgba(10,10,35,0));
    z-index: -1;
  }
  
  article h2 {
    font-family: 'Montserrat', sans-serif;
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--accent);
    position: relative;
    padding-bottom: 15px;
  }
  
  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--neon-purple));
  }
  
  article h3 {
    font-family: 'Montserrat', sans-serif;
    font-size: 1.8rem;
    margin: 2.5rem 0 1.5rem;
    color: var(--neon-blue);
  }
  
  article p {
    margin-bottom: 1.5rem;
    color: var(--text-light);
  }
  
  pre {
    background: rgba(0,0,0,0.5);
    border-radius: 10px;
    padding: 20px;
    margin: 2rem 0;
    overflow: auto;
    border-left: 3px solid var(--accent);
    font-family: 'Roboto Mono', monospace;
    font-size: 15px;
    line-height: 1.5;
    position: relative;
  }
  
  pre::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(30,60,114,0.2), rgba(10,10,35,0));
    pointer-events: none;
  }
  
  code {
    font-family: 'Roboto Mono', monospace;
    background: rgba(0,0,0,0.3);
    padding: 2px 5px;
    border-radius: 3px;
    color: var(--neon-blue);
  }
  
  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 3rem 0;
  }
  
  .image-card {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  
  .image-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,240,255,0.2);
  }
  
  .image-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }
  
  .image-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(142,45,226,0.3), rgba(74,0,224,0.3));
    opacity: 0;
    transition: opacity 0.3s ease;
  }
  
  .image-card:hover::after {
    opacity: 1;
  }
  
  .nav-tabs {
    display: flex;
    margin: 2rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }
  
  .nav-tab {
    padding: 15px 25px;
    cursor: pointer;
    position: relative;
    font-family: 'Montserrat', sans-serif;
    color: var(--text-muted);
    transition: color 0.3s ease;
  }
  
  .nav-tab:hover {
    color: var(--text-light);
  }
  
  .nav-tab.active {
    color: var(--accent);
  }
  
  .nav-tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--accent);
  }
  
  .footer {
    text-align: center;
    padding: 40px 0;
    margin-top: 80px;
    position: relative;
  }
  
  .footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  }
  
  .footer p {
    color: var(--text-muted);
    font-size: 14px;
  }
  
  @media (max-width: 768px) {
    .hero h1 {
      font-size: 2.5rem;
    }
    
    article {
      padding: 40px 20px;
    }
    
    article h2 {
      font-size: 2rem;
    }
    
    article h3 {
      font-size: 1.5rem;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }
  
  /* Animations */
  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
  }
  
  @keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
  }
  
  .floating {
    animation: float 6s ease-in-out infinite;
  }
  
  .pulse {
    animation: pulse 2s ease-in-out infinite;
  }
  
  /* Decorative elements */
  .decor-circle {
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0,240,255,0.1), transparent 70%);
    z-index: -1;
  }
  
  .decor-circle-1 {
    top: -150px;
    right: -150px;
  }
  
  .decor-circle-2 {
    bottom: -100px;
    left: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(142,45,226,0.1), transparent 70%);
  }
  
  .decor-line {
    position: absolute;
    height: 100%;
    width: 1px;
    background: linear-gradient(to bottom, transparent, rgba(0,240,255,0.3), transparent);
    left: 50%;
    top: 0;
    z-index: -1;
  }
  
  .decor-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: var(--neon-blue);
    transform: translate(-1px, 0);
    box-shadow: 0 0 10px 2px var(--neon-blue);
  }