:root {
  --primary: #1E90FF;
  --secondary: #0D0D0D;
  --accent: #00FF7F;
  --highlight: #FFA500;
  --text: #F5F5F5;
  --bg: #121212;
}

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

body {
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

.header {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  padding: 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin-bottom: 3rem;
}

.header::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;
}

.header h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
  text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.header p {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  font-size: 1.1rem;
}

.notice {
  background: rgba(255,255,255,0.1);
  padding: 1rem;
  border-radius: 8px;
  margin: 2rem auto;
  max-width: 800px;
  text-align: center;
  border-left: 4px solid var(--accent);
  backdrop-filter: blur(10px);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

article {
  background: rgba(30, 30, 30, 0.8);
  border-radius: 16px;
  padding: 3rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.1);
}

article h2 {
  color: var(--primary);
  font-size: 2rem;
  margin-bottom: 2rem;
  position: relative;
  padding-bottom: 1rem;
}

article h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}

article h3 {
  color: var(--accent);
  font-size: 1.5rem;
  margin: 2rem 0 1rem;
}

article p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

pre {
  background: var(--secondary);
  padding: 1.5rem;
  border-radius: 8px;
  margin: 2rem 0;
  overflow: auto;
  border-left: 4px solid var(--primary);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background: var(--secondary);
  border-radius: 8px;
  overflow: hidden;
}

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

th {
  background: rgba(30, 144, 255, 0.2);
  color: var(--primary);
}

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

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.image-card {
  background: var(--secondary);
  border-radius: 12px;
  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(0,255,127,0.3);
}

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

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

.image-card .caption {
  padding: 1rem;
  background: linear-gradient(to top, rgba(13,13,13,0.9), transparent);
  position: relative;
  z-index: 1;
}

.nav-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 2rem 0;
}

.nav-link {
  padding: 0.8rem 1.5rem;
  background: rgba(30, 144, 255, 0.2);
  border-radius: 50px;
  color: var(--primary);
  text-decoration: none;
  transition: all 0.3s ease;
  border: 1px solid rgba(30, 144, 255, 0.3);
}

.nav-link:hover {
  background: rgba(30, 144, 255, 0.4);
  transform: translateY(-3px);
}

.footer {
  text-align: center;
  padding: 2rem;
  margin-top: 3rem;
  background: linear-gradient(to top, var(--secondary), transparent);
}

@media (max-width: 768px) {
  .header h1 {
    font-size: 2rem;
  }
  
  article {
    padding: 2rem 1.5rem;
  }
  
  .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;
}