:root {
    --primary: linear-gradient(135deg, #8A2BE2 0%, #00BFFF 100%);
    --secondary: linear-gradient(45deg, #FF7E5F 0%, #FEB47B 100%);
    --accent: #FF4500;
    --text: #333;
    --light: #fff;
    --dark: #121212;
    --shadow: 0 10px 30px rgba(0,0,0,0.1);
    --radius: 12px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

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

  body {
    font-family: 'Montserrat', 'Open Sans', sans-serif;
    color: var(--text);
    line-height: 1.7;
    background: #f9f9f9;
    padding-top: 80px;
  }

  .header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 5%;
    background: var(--primary);
    color: white;
    box-shadow: var(--shadow);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .logo {
    font-size: 24px;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
  }

  .nav {
    display: flex;
    gap: 30px;
  }

  .nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 20px;
    transition: var(--transition);
  }

  .nav a:hover {
    background: rgba(255,255,255,0.2);
  }

  .hero {
    min-height: 500px;
    padding: 100px 10% 80px;
    background: var(--primary);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center/cover;
    opacity: 0.1;
  }

  .hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    position: relative;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
  }

  .hero p {
    max-width: 700px;
    margin: 0 auto 40px;
    font-size: 1.2rem;
    position: relative;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 5%;
  }

  .section {
    margin-bottom: 80px;
    background: white;
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
  }

  .section::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    background: url('https://images.gptkong.com/demo/sample2.png') no-repeat center/cover;
    opacity: 0.1;
  }

  h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    color: #6A5ACD;
    position: relative;
    padding-bottom: 15px;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--secondary);
    border-radius: 2px;
  }

  h3 {
    font-size: 1.5rem;
    margin: 30px 0 20px;
    color: #00BFFF;
  }

  p {
    margin-bottom: 20px;
    font-size: 1.1rem;
  }

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

  .card {
    background: white;
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
  }

  .card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius);
    margin-bottom: 20px;
    transition: var(--transition);
  }

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

  .code-container {
    background: #282c34;
    border-radius: var(--radius);
    padding: 20px;
    margin: 30px 0;
    overflow-x: auto;
  }

  pre {
    color: #abb2bf;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    white-space: pre-wrap;
  }

  .btn {
    display: inline-block;
    padding: 12px 24px;
    background: var(--secondary);
    color: white;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(254, 180, 123, 0.4);
  }

  .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(254, 180, 123, 0.6);
  }

  .footer {
    background: var(--dark);
    color: white;
    padding: 60px 10% 30px;
    text-align: center;
  }

  .footer p {
    opacity: 0.8;
    font-size: 0.9rem;
  }

  .note {
    background: rgba(106, 90, 205, 0.1);
    border-left: 4px solid #6A5ACD;
    padding: 20px;
    margin: 30px 0;
    border-radius: 0 var(--radius) var(--radius) 0;
  }

  @media (max-width: 768px) {
    .hero h1 {
      font-size: 2.2rem;
    }
    
    .nav {
      gap: 15px;
    }
    
    .section {
      padding: 30px 20px;
    }
  }

  /* Animations */
  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
  }

  .floating {
    animation: float 3s ease-in-out infinite;
  }

  @keyframes gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }