:root {
  --primary: #0d47a1;
  --secondary: #6a1b9a;
  --accent: #ff9800;
  --light: #f5f7fa;
  --dark: #1a237e;
  --text: #333;
  --text-light: #f5f7fa;
}

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

body {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  min-height: 100%;
  overflow-x: hidden;
}

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

.header {
  background: rgba(13, 71, 161, 0.9);
  padding: 1.5rem;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header h1 {
  color: white;
  font-size: 1.8rem;
  font-weight: 500;
  letter-spacing: 1px;
}

.nav {
  display: flex;
  gap: 2rem;
}

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

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

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

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

.main {
  margin-top: 100px;
  padding: 2rem 0;
}

.hero {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 3rem;
  margin-bottom: 3rem;
  text-align: center;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
  border: 1px solid rgba(255,255,255,0.1);
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: white;
  text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.hero p {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.9);
  max-width: 800px;
  margin: 0 auto 2rem;
}

.notice {
  background: var(--accent);
  color: white;
  padding: 1rem;
  border-radius: 8px;
  text-align: center;
  margin-bottom: 2rem;
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(255,152,0,0.3);
}

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

.card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.2);
}

.card-img {
  height: 200px;
  overflow: hidden;
}

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

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

.card-content {
  padding: 1.5rem;
}

.card-content h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--primary);
}

.card-content p {
  margin-bottom: 1.5rem;
  color: var(--text);
}

.btn {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 0.8rem 1.5rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn:hover {
  background: var(--secondary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

article {
  background: white;
  border-radius: 16px;
  padding: 3rem;
  margin-bottom: 3rem;
  box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

article h2 {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.5rem;
}

article h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}

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

article p {
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

pre {
  background: #f5f7fa;
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  overflow-x: auto;
  border-left: 4px solid var(--accent);
}

code {
  font-family: 'Courier New', monospace;
  color: #333;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

th, td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid #eee;
}

th {
  background: var(--primary);
  color: white;
}

tr:nth-child(even) {
  background: #f9f9f9;
}

tr:hover {
  background: #f1f1f1;
}

.footer {
  background: var(--dark);
  color: white;
  padding: 2rem 0;
  text-align: center;
  margin-top: 3rem;
}

.footer p {
  margin-bottom: 1rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1.5rem;
}

.footer-links a {
  color: white;
  text-decoration: none;
  transition: color 0.3s ease;
}

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

@media (max-width: 768px) {
  .header {
    flex-direction: column;
    padding: 1rem;
  }
  
  .nav {
    margin-top: 1rem;
    gap: 1rem;
  }
  
  .hero h2 {
    font-size: 2rem;
  }
  
  article {
    padding: 2rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate {
  animation: fadeIn 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }