:root {
  --primary-color: #0D47A1;
  --secondary-color: #6A1B9A;
  --accent-color-1: #00BCD4;
  --accent-color-2: #69F0AE;
  --text-light: #E0E0E0;
  --text-dark: #212121;
  --bg-dark: #121212;
  --bg-light: rgba(255, 255, 255, 0.1);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Montserrat', sans-serif;
}

body {
  background: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.6;
  overflow-x: hidden;
  padding-top: 80px;
}

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

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  padding: 20px 0;
  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;
  color: white;
  text-decoration: none;
  font-family: 'Roboto', sans-serif;
}

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

.nav-link {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  padding: 5px 0;
}

.nav-link:hover {
  color: var(--accent-color-2);
}

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

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

.hero {
  height: 500px;
  display: flex;
  align-items: center;
  background: linear-gradient(rgba(13, 71, 161, 0.7), rgba(106, 27, 154, 0.7)), 
              url('https://images.gptkong.com/demo/sample1.png');
  background-size: cover;
  background-position: center;
  margin-bottom: 60px;
  border-radius: 0 0 20px 20px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(-45deg, var(--primary-color), var(--secondary-color), var(--accent-color-1), var(--accent-color-2));
  background-size: 400% 400%;
  opacity: 0.3;
  animation: gradientAnimation 15s ease infinite;
}

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

.hero-title {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 20px;
  font-family: 'Roboto', sans-serif;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

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

.notice {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 15px;
  border-radius: 10px;
  margin: 40px 0;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.content-section {
  margin: 60px 0;
}

.section-title {
  font-size: 32px;
  margin-bottom: 30px;
  position: relative;
  display: inline-block;
  font-family: 'Roboto', sans-serif;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 50%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-color-1), var(--accent-color-2));
  border-radius: 3px;
}

.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(500px, 1fr));
  gap: 30px;
  margin: 40px 0;
}

.card {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 15px;
  padding: 30px;
  transition: var(--transition);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
  background: rgba(255, 255, 255, 0.1);
}

.card-title {
  font-size: 22px;
  margin-bottom: 15px;
  color: var(--accent-color-2);
  font-family: 'Roboto', sans-serif;
}

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 20px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  transition: var(--transition);
}

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

pre {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 10px;
  padding: 20px;
  overflow-x: auto;
  margin: 20px 0;
  border-left: 4px solid var(--accent-color-1);
  font-family: 'Courier New', monospace;
  font-size: 14px;
  line-height: 1.5;
}

code {
  color: var(--accent-color-2);
  font-family: 'Courier New', monospace;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(5px);
  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(0, 0, 0, 0.2);
  color: var(--accent-color-1);
  font-family: 'Roboto', sans-serif;
}

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

.footer {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  padding: 40px 0;
  margin-top: 60px;
}

.footer-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.footer-column h3 {
  font-size: 20px;
  margin-bottom: 20px;
  font-family: 'Roboto', sans-serif;
}

.footer-links {
  list-style: none;
}

.footer-link {
  display: block;
  color: var(--text-light);
  text-decoration: none;
  margin-bottom: 10px;
  transition: var(--transition);
}

.footer-link:hover {
  color: var(--accent-color-2);
  transform: translateX(5px);
}

.copyright {
  text-align: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

@media (max-width: 768px) {
  .hero-title {
    font-size: 36px;
  }
  
  .grid-container {
    grid-template-columns: 1fr;
  }
  
  .nav {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero {
    height: 400px;
  }
  
  .hero-title {
    font-size: 28px;
  }
  
  .section-title {
    font-size: 26px;
  }
}