:root {
    --primary: linear-gradient(135deg, #1e3c72, #2a5298);
    --secondary: rgba(30, 60, 114, 0.9);
    --accent: linear-gradient(45deg, #ff6a00, #ee0979);
    --text-light: #f0f0f0;
    --text-dark: #333;
    --transition: all 0.3s ease;
  }

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

  body {
    background: var(--primary);
    color: var(--text-light);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
  }

  .design-notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 10px 20px;
    border-radius: 30px;
    z-index: 1000;
    font-size: 14px;
    backdrop-filter: blur(5px);
  }

  .navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 5%;
    z-index: 1000;
    backdrop-filter: blur(10px);
    box-shadow: 0 5px 30px rgba(0,0,0,0.2);
  }

  .navbar-logo {
    font-size: 1.8em;
    font-weight: 700;
    background: var(--accent);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(238, 9, 121, 0.3);
  }

  .navbar-menu {
    display: flex;
    gap: 30px;
  }

  .navbar-menu a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 1.1em;
    transition: var(--transition);
    position: relative;
    padding: 5px 0;
  }

  .navbar-menu a:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
  }

  .navbar-menu a:hover {
    color: #ff6a00;
  }

  .navbar-menu a:hover:after {
    width: 100%;
  }

  .hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 10%;
    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') center/cover no-repeat;
    opacity: 0.1;
    z-index: -1;
  }

  .hero h1 {
    font-size: 3.5em;
    margin-bottom: 20px;
    background: linear-gradient(to right, #fff, #aaa);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 5px 15px rgba(0,0,0,0.2);
  }

  .hero p {
    font-size: 1.2em;
    max-width: 700px;
    margin-bottom: 40px;
  }

  .cta-button {
    background: var(--accent);
    border: none;
    padding: 15px 40px;
    color: #fff;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 50px;
    font-size: 1.1em;
    font-weight: 600;
    box-shadow: 0 5px 15px rgba(238, 9, 121, 0.4);
    position: relative;
    overflow: hidden;
  }

  .cta-button:hover {
    background: linear-gradient(45deg, #ee0979, #ff6a00);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(238, 9, 121, 0.6);
  }

  .cta-button:active {
    transform: translateY(1px);
  }

  .content-section {
    padding: 100px 10%;
    position: relative;
  }

  .content-section:nth-child(even) {
    background: rgba(0,0,0,0.1);
  }

  .section-title {
    font-size: 2.5em;
    margin-bottom: 50px;
    position: relative;
    display: inline-block;
  }

  .section-title:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50%;
    height: 4px;
    background: var(--accent);
    border-radius: 2px;
  }

  .content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 40px;
  }

  .grid-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 30px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: var(--transition);
    border: 1px solid rgba(255,255,255,0.1);
  }

  .grid-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.2);
    border-color: rgba(255,255,255,0.3);
  }

  .grid-item h3 {
    font-size: 1.8em;
    margin-bottom: 20px;
    color: #ff6a00;
  }

  .grid-item p {
    margin-bottom: 20px;
    font-size: 1.1em;
  }

  .image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }

  .gallery-item {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    transition: var(--transition);
    position: relative;
    aspect-ratio: 1/1;
  }

  .gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
  }

  .gallery-item:hover {
    transform: scale(1.03);
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
  }

  .gallery-item:hover img {
    transform: scale(1.1);
  }

  pre {
    background: rgba(0,0,0,0.2);
    padding: 20px;
    border-radius: 10px;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    margin: 20px 0;
    border-left: 4px solid #ff6a00;
    position: relative;
  }

  pre::before {
    content: 'CSS';
    position: absolute;
    top: 0;
    left: 0;
    background: #ff6a00;
    color: white;
    padding: 2px 10px;
    font-size: 0.8em;
    border-bottom-right-radius: 5px;
  }

  code {
    font-family: 'Courier New', monospace;
    background: rgba(255,106,0,0.1);
    padding: 2px 5px;
    border-radius: 3px;
    color: #ff6a00;
  }

  .parallax-section {
    height: 500px;
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    position: relative;
    margin: 100px 0;
  }

  .parallax-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(30, 60, 114, 0.7);
  }

  .parallax-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    width: 80%;
  }

  .wave-animation {
    position: relative;
    height: 100px;
    width: 100%;
    overflow: hidden;
    margin: 50px 0;
  }

  .wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 200%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample3.png') repeat-x;
    animation: wave 10s linear infinite;
    opacity: 0.8;
  }

  @keyframes wave {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
  }

  .data-visualization {
    display: flex;
    justify-content: space-around;
    align-items: flex-end;
    height: 300px;
    margin: 50px 0;
  }

  .chart-bar {
    width: 60px;
    background: var(--accent);
    border-radius: 5px 5px 0 0;
    position: relative;
    transition: height 1s ease;
    box-shadow: 0 5px 15px rgba(238, 9, 121, 0.3);
  }

  .chart-bar::after {
    content: attr(data-value);
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    font-weight: bold;
  }

  .loading-spinner {
    display: inline-block;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid #ff6a00;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
  }

  @keyframes spin {
    to { transform: rotate(360deg); }
  }

  footer {
    background: rgba(0,0,0,0.2);
    padding: 50px 10%;
    text-align: center;
    margin-top: 100px;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 30px;
  }

  .footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
  }

  .footer-links a:hover {
    color: #ff6a00;
  }

  @media (max-width: 768px) {
    .navbar {
      flex-direction: column;
      padding: 15px;
    }

    .navbar-menu {
      margin-top: 15px;
      flex-wrap: wrap;
      justify-content: center;
    }

    .hero h1 {
      font-size: 2.5em;
    }

    .content-grid {
      grid-template-columns: 1fr;
    }

    .section-title {
      font-size: 2em;
    }

    .gallery-item {
      aspect-ratio: 16/9;
    }
  }

  @media (max-width: 480px) {
    .hero h1 {
      font-size: 2em;
    }

    .hero p {
      font-size: 1em;
    }

    .cta-button {
      padding: 12px 30px;
    }

    .content-section {
      padding: 70px 5%;
    }
  }