:root {
  --primary-color: #1A237E;
  --secondary-color: #6200EA;
  --accent-color: #4FC3F7;
  --text-color: #FFFFFF;
  --bg-gradient: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  --card-bg: rgba(26, 35, 126, 0.8);
  --transition: all 0.3s ease;
}

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

body {
  background: var(--bg-gradient);
  color: var(--text-color);
  font-family: 'Open Sans', sans-serif;
  line-height: 1.6;
  min-height: 100%;
  overflow-x: hidden;
}

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

.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: rgba(26, 35, 126, 0.95);
  display: flex;
  justify-content: center;
  padding: 15px 0;
  z-index: 1000;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

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

.nav-links a {
  color: var(--text-color);
  text-decoration: none;
  font-family: 'Roboto', sans-serif;
  font-weight: 500;
  font-size: 16px;
  transition: var(--transition);
  position: relative;
  padding: 5px 0;
}

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

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

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

.header {
  padding: 120px 0 60px;
  text-align: center;
  position: relative;
}

.header h1 {
  font-size: 3rem;
  margin-bottom: 20px;
  background: linear-gradient(to right, var(--accent-color), #FFFFFF);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 2px 10px rgba(76, 195, 247, 0.3);
}

.header p {
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto 30px;
}

.notice {
  background: rgba(76, 195, 247, 0.2);
  padding: 15px;
  border-radius: 8px;
  margin: 30px auto;
  max-width: 800px;
  text-align: center;
  border: 1px solid rgba(76, 195, 247, 0.5);
  box-shadow: 0 0 20px rgba(76, 195, 247, 0.1);
}

.grid-container {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 30px;
  margin: 60px 0;
}

.main-content {
  grid-column: 1 / 9;
}

.sidebar {
  grid-column: 10 / 13;
}

article {
  background: var(--card-bg);
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  margin-bottom: 40px;
  transition: var(--transition);
}

article:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

article h2 {
  font-size: 2rem;
  color: var(--accent-color);
  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-color), transparent);
}

article h3 {
  font-size: 1.5rem;
  margin: 25px 0 15px;
  color: var(--accent-color);
}

article p {
  font-size: 1.1rem;
  margin-bottom: 20px;
}

table {
  width: 100%;
  margin: 25px 0;
  border-collapse: collapse;
  background: rgba(26, 35, 126, 0.6);
  border-radius: 8px;
  overflow: hidden;
}

th {
  background: rgba(76, 195, 247, 0.3);
  padding: 15px;
  text-align: left;
}

td {
  padding: 15px;
  border-top: 1px solid rgba(76, 195, 247, 0.1);
}

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

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

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

.image-card {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  transition: var(--transition);
  aspect-ratio: 1/1;
}

.image-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(76, 195, 247, 0.3);
}

.image-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

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

.sidebar-card {
  background: var(--card-bg);
  padding: 25px;
  border-radius: 12px;
  margin-bottom: 30px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.sidebar-card h3 {
  font-size: 1.3rem;
  margin-bottom: 15px;
  color: var(--accent-color);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  background: rgba(76, 195, 247, 0.2);
  padding: 5px 15px;
  border-radius: 20px;
  font-size: 0.9rem;
  transition: var(--transition);
}

.tag:hover {
  background: var(--accent-color);
  color: var(--primary-color);
}

.footer {
  text-align: center;
  padding: 40px 0;
  margin-top: 60px;
  background: rgba(26, 35, 126, 0.8);
}

@media (max-width: 1024px) {
  .grid-container {
    grid-template-columns: 1fr;
  }
  
  .main-content, .sidebar {
    grid-column: 1 / -1;
  }
  
  .header h1 {
    font-size: 2.5rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    gap: 15px;
  }
  
  article {
    padding: 30px;
  }
  
  .image-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  }
}

@media (max-width: 480px) {
  .header h1 {
    font-size: 2rem;
  }
  
  .header p {
    font-size: 1rem;
  }
  
  .nav-links {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }
  
  article {
    padding: 20px;
  }
  
  article h2 {
    font-size: 1.5rem;
  }
  
  pre {
    padding: 15px;
    font-size: 0.8rem;
  }
}