:root {
    --primary: linear-gradient(135deg, #456FFF, #9E37F8);
    --secondary: #3FFFA3;
    --accent: #FFD700;
    --dark: #1A1A1A;
    --light: rgba(255, 255, 255, 0.9);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  }

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

  body {
    background: var(--dark);
    color: var(--light);
    font-family: 'Montserrat', 'Segoe UI', sans-serif;
    line-height: 1.8;
    overflow-x: hidden;
  }

  .header {
    position: relative;
    height: 80vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
    margin-bottom: 5rem;
    overflow: hidden;
  }

  .header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample3.png') center/cover no-repeat;
    opacity: 0.15;
    z-index: 0;
  }

  .header-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    padding: 2rem;
  }

  h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    background: linear-gradient(to right, #FFF, var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .tagline {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
  }

  .notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.7);
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 0.9rem;
    z-index: 1000;
    backdrop-filter: blur(5px);
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
  }

  article {
    background: rgba(30, 30, 30, 0.7);
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 5rem;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  h2 {
    font-size: 2.5rem;
    margin: 2rem 0 1.5rem;
    background: linear-gradient(to right, var(--secondary), #9E37F8);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  h3 {
    font-size: 1.8rem;
    margin: 1.5rem 0 1rem;
    color: var(--secondary);
  }

  p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
  }

  .image-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  }

  .image-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
  }

  .image-card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
  }

  .image-caption {
    padding: 1.5rem;
    text-align: center;
  }

  pre {
    background: rgba(20, 20, 20, 0.8);
    border-radius: 10px;
    padding: 1.5rem;
    margin: 2rem 0;
    overflow: auto;
    border-left: 4px solid var(--secondary);
    font-family: 'Fira Code', monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    position: relative;
  }

  pre::before {
    content: "CSS";
    position: absolute;
    top: 0;
    right: 0;
    background: var(--secondary);
    color: var(--dark);
    padding: 0.2rem 0.8rem;
    border-radius: 0 0 0 10px;
    font-size: 0.8rem;
    font-weight: bold;
  }

  code {
    font-family: 'Fira Code', monospace;
    background: rgba(63, 255, 163, 0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    color: var(--secondary);
    font-size: 0.95rem;
  }

  .nav-tabs {
    display: flex;
    gap: 1rem;
    margin: 2rem 0;
    flex-wrap: wrap;
  }

  .nav-tab {
    padding: 0.8rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
  }

  .nav-tab:hover {
    background: var(--secondary);
    color: var(--dark);
    transform: translateY(-3px);
  }

  .tech-decoration {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 0;
    opacity: 0.1;
    background: url('https://images.gptkong.com/demo/sample6.png') center/cover no-repeat;
  }

  @media (max-width: 768px) {
    h1 {
      font-size: 2.5rem;
    }
    
    .tagline {
      font-size: 1.2rem;
    }
    
    article {
      padding: 2rem 1.5rem;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }

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

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

  .fade-in {
    opacity: 0;
    animation: fadeIn 1s ease-out forwards;
  }

  @keyframes fadeIn {
    to {
      opacity: 1;
    }
  }

  .delay-1 {
    animation-delay: 0.2s;
  }

  .delay-2 {
    animation-delay: 0.4s;
  }

  .delay-3 {
    animation-delay: 0.6s;
  }