:root {
  --primary-color: #00aaff;
  --secondary-color: #aa00ff;
  --background-color: #f0f0f0;
  --text-color: #333333;
  --accent-color: #ff5500;
  --light-gray: #e5e5e5;
  --dark-gray: #222222;
  --border-radius: 12px;
  --box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background: linear-gradient(135deg, #f5f7fa 0%, #e4e8eb 100%);
  padding-top: 80px;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--box-shadow);
  z-index: 1000;
  padding: 1rem 5%;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-decoration: none;
}

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

.nav-links a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  padding: 0.5rem 0;
  transition: var(--transition);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  transition: var(--transition);
}

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

.notice {
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  color: white;
  text-align: center;
  padding: 1rem;
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 500px;
  text-align: center;
  margin-bottom: 4rem;
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius);
  background: linear-gradient(135deg, rgba(0, 170, 255, 0.1) 0%, rgba(170, 0, 255, 0.1) 100%);
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  font-size: 1.2rem;
  max-width: 700px;
  margin-bottom: 2rem;
  color: var(--dark-gray);
}

.hero-image {
  width: 100%;
  max-width: 800px;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  margin-top: 2rem;
  transition: var(--transition);
}

.hero-image:hover {
  transform: translateY(-5px);
}

article {
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 3rem;
  margin-bottom: 4rem;
}

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

article h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

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

article p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  line-height: 1.8;
}

pre {
  background: #2d2d2d;
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin: 2rem 0;
  overflow-x: auto;
  box-shadow: var(--box-shadow);
}

code {
  font-family: 'Courier New', monospace;
  color: #f8f8f2;
  font-size: 0.9rem;
}

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

.gallery img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.gallery img:hover {
  transform: scale(1.03);
}

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

.feature-card {
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 2rem;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.15);
}

.feature-card h4 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.feature-card p {
  color: #666;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-block;
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 0.8rem 1.8rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

footer {
  background: var(--dark-gray);
  color: white;
  padding: 3rem 0;
  text-align: center;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin: 1.5rem 0;
}

.footer-links a {
  color: white;
  text-decoration: none;
  transition: var(--transition);
}

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hero h1 {
    font-size: 2.2rem;
  }
  
  article {
    padding: 2rem;
  }
  
  .gallery {
    grid-template-columns: 1fr;
  }
}

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

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

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