:root {
  --primary-blue: #0D47A1;
  --primary-purple: #6200EA;
  --white: #FFFFFF;
  --grey: #E0E0E0;
  --accent-orange: #FFAB40;
  --accent-green: #66BB6A;
  --dark-bg: #0a192f;
  --light-bg: #f8f9fa;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Helvetica', sans-serif;
  background: linear-gradient(135deg, var(--dark-bg), var(--primary-purple));
  color: var(--white);
  line-height: 1.6;
}

.header {
  text-align: center;
  padding: 60px 20px;
  background: linear-gradient(rgba(13, 71, 161, 0.7), rgba(98, 0, 234, 0.7));
  position: relative;
  overflow: hidden;
}

.header::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: 0.2;
  z-index: -1;
}

.header h1 {
  font-size: 2.8rem;
  margin-bottom: 20px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.header p {
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto;
}

.navbar {
  position: sticky;
  top: 0;
  background: rgba(10, 25, 47, 0.9);
  backdrop-filter: blur(10px);
  padding: 15px 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

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

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

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

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

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

.main-content {
  max-width: 1200px;
  margin: 40px auto;
  padding: 0 20px;
}

.article-container {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  border-radius: 15px;
  padding: 40px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

article h2 {
  font-size: 2rem;
  color: var(--accent-orange);
  margin-top: 40px;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

article h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100px;
  height: 3px;
  background: linear-gradient(to right, var(--accent-orange), var(--accent-green));
}

article h3 {
  font-size: 1.5rem;
  color: var(--white);
  margin-top: 30px;
  margin-bottom: 15px;
}

article p {
  font-size: 1.1rem;
  margin-bottom: 20px;
  color: var(--grey);
}

.code-container {
  position: relative;
  margin: 30px 0;
  border-radius: 8px;
  overflow: hidden;
}

pre {
  margin: 0;
  padding: 20px;
  background: rgba(0,0,0,0.3);
  border-left: 4px solid var(--accent-orange);
  overflow-x: auto;
}

code {
  font-family: 'Courier New', monospace;
  color: var(--white);
  font-size: 0.9rem;
}

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

.image-card {
  position: relative;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.image-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.3);
}

.image-card img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.image-card:hover img {
  transform: scale(1.1);
}

.image-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 30px 0;
  background: rgba(255,255,255,0.1);
  border-radius: 8px;
  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-orange);
  font-weight: bold;
}

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

.footer {
  text-align: center;
  padding: 30px;
  background: rgba(0,0,0,0.2);
  margin-top: 60px;
  font-size: 0.9rem;
  color: var(--grey);
}

.notice {
  background: rgba(255,171,64,0.2);
  border-left: 4px solid var(--accent-orange);
  padding: 15px;
  margin: 20px 0;
  border-radius: 0 8px 8px 0;
}

@media (max-width: 768px) {
  .header h1 {
    font-size: 2rem;
  }
  
  .nav-links {
    gap: 15px;
  }
  
  .article-container {
    padding: 20px;
  }
  
  article h2 {
    font-size: 1.5rem;
  }
  
  article h3 {
    font-size: 1.3rem;
  }
  
  .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;
}