:root {
  --primary-color: #0f2027;
  --secondary-color: #2c5364;
  --accent-color: #ffa500;
  --text-color: #ffffff;
  --light-gray: #cccccc;
  --dark-gray: #333333;
  --card-bg: rgba(255, 255, 255, 0.1);
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Roboto', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  min-height: 100%;
  padding: 0;
  margin: 0;
}

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

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(20, 20, 20, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  padding: 15px 0;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-color);
  margin-left: 30px;
  text-decoration: none;
}

.nav {
  display: flex;
  margin-right: 30px;
}

.nav-link {
  color: var(--text-color);
  text-decoration: none;
  margin-left: 20px;
  padding: 5px 10px;
  border-radius: 5px;
  transition: var(--transition);
}

.nav-link:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.main {
  padding-top: 80px;
}

.hero {
  height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  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: 0.2;
  z-index: -1;
}

.hero-content {
  max-width: 800px;
  padding: 40px;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  border-radius: 15px;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 20px;
  color: var(--accent-color);
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 30px;
}

.notice {
  background: rgba(255, 255, 255, 0.1);
  padding: 15px;
  border-radius: 8px;
  margin: 30px 0;
  text-align: center;
  font-size: 0.9rem;
  border-left: 3px solid var(--accent-color);
}

.article-container {
  background: rgba(20, 20, 20, 0.7);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  border-radius: 15px;
  padding: 40px;
  margin: 40px 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

article {
  max-width: 1000px;
  margin: 0 auto;
}

article h2 {
  font-size: 1.8rem;
  margin: 30px 0 20px;
  color: var(--accent-color);
  position: relative;
  padding-bottom: 10px;
}

article h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-color), transparent);
}

article h3 {
  font-size: 1.4rem;
  margin: 25px 0 15px;
  color: var(--light-gray);
}

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

pre {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  padding: 20px;
  margin: 20px 0;
  overflow-x: auto;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  border-left: 3px solid var(--accent-color);
}

code {
  font-family: 'Courier New', monospace;
  background: rgba(0, 0, 0, 0.3);
  padding: 2px 5px;
  border-radius: 3px;
  font-size: 0.9rem;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.image-card {
  background: var(--card-bg);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
}

.image-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.image-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.image-caption {
  padding: 15px;
  font-size: 0.9rem;
}

.footer {
  background: rgba(20, 20, 20, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 30px 0;
  margin-top: 50px;
  text-align: center;
}

.footer p {
  color: var(--light-gray);
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .header {
    flex-direction: column;
    padding: 15px;
  }
  
  .logo {
    margin: 0 0 15px 0;
  }
  
  .nav {
    margin: 0;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  article h2 {
    font-size: 1.5rem;
  }
  
  article h3 {
    font-size: 1.2rem;
  }
  
  .image-grid {
    grid-template-columns: 1fr;
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.floating {
  animation: float 3s ease-in-out infinite;
}