:root {
    --primary: #1E274A;
    --secondary: #3DDC84;
    --accent: #FF9900;
    --light: #F3F5F9;
    --dark: #0A0F23;
    --gradient: linear-gradient(135deg, var(--primary), var(--secondary));
  }

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

  body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    color: var(--light);
    background: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  header {
    background: rgba(30, 39, 74, 0.95);
    padding: 20px 0;
    position: fixed;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
  }

  .header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .logo {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(90deg, var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

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

  .nav-links a {
    color: var(--light);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
  }

  .nav-links a:hover {
    color: var(--secondary);
  }

  .nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: var(--secondary);
    transition: width 0.3s ease;
  }

  .nav-links a:hover::after {
    width: 100%;
  }

  .hero {
    padding: 180px 0 100px;
    background: var(--gradient);
    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 right/contain;
    opacity: 0.1;
  }

  .hero-content {
    max-width: 600px;
    position: relative;
    z-index: 1;
  }

  .hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    line-height: 1.2;
    background: linear-gradient(90deg, var(--light), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  }

  .hero p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
  }

  .cta-button {
    display: inline-block;
    padding: 15px 30px;
    background: var(--accent);
    color: white;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 153, 0, 0.3);
  }

  .cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255, 153, 0, 0.4);
    background: #e68a00;
  }

  .notice {
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 8px;
    margin: 30px 0;
    border-left: 4px solid var(--secondary);
    font-size: 14px;
  }

  .content-section {
    padding: 100px 0;
    position: relative;
  }

  .content-section:nth-child(even) {
    background: rgba(30, 39, 74, 0.1);
  }

  .section-title {
    font-size: 36px;
    margin-bottom: 40px;
    position: relative;
    display: inline-block;
  }

  .section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--secondary);
    border-radius: 2px;
  }

  .split-layout {
    display: flex;
    gap: 40px;
    align-items: center;
    margin-bottom: 60px;
  }

  .split-layout.reverse {
    flex-direction: row-reverse;
  }

  .split-text {
    flex: 1;
  }

  .split-image {
    flex: 1;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    transition: transform 0.5s ease;
  }

  .split-image:hover {
    transform: scale(1.02);
  }

  .split-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
  }

  .split-image:hover img {
    transform: scale(1.05);
  }

  .tech-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  .tech-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    border-color: var(--secondary);
  }

  .tech-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--secondary);
  }

  .tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 50px 0;
  }

  .code-block {
    background: rgba(30, 39, 74, 0.5);
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    border-left: 4px solid var(--secondary);
  }

  .code-block pre {
    margin: 0;
    white-space: pre-wrap;
  }

  .code-block code {
    color: var(--light);
    font-size: 14px;
    line-height: 1.5;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    background: rgba(30, 39, 74, 0.3);
    border-radius: 10px;
    overflow: hidden;
  }

  th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  th {
    background: rgba(61, 220, 132, 0.2);
    color: var(--secondary);
    font-weight: 600;
  }

  tr:hover {
    background: rgba(255, 255, 255, 0.05);
  }

  .data-flow {
    height: 4px;
    background: linear-gradient(90deg, var(--secondary), var(--accent));
    border-radius: 2px;
    margin: 30px 0;
    position: relative;
    overflow: hidden;
  }

  .data-flow::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
    animation: flow 2s linear infinite;
  }

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

  footer {
    background: var(--primary);
    padding: 60px 0 30px;
    text-align: center;
  }

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

  .footer-links a {
    color: var(--light);
    text-decoration: none;
    transition: color 0.3s ease;
  }

  .footer-links a:hover {
    color: var(--secondary);
  }

  .copyright {
    opacity: 0.7;
    font-size: 14px;
    margin-top: 30px;
  }

  @media (max-width: 768px) {
    .hero h1 {
      font-size: 36px;
    }

    .split-layout {
      flex-direction: column;
    }

    .section-title {
      font-size: 28px;
    }

    .nav-links {
      display: none;
    }
  }