:root {
  --primary: rgba(30, 144, 255, 0.8);
  --secondary: rgba(50, 205, 50, 0.8);
  --accent: #ff6b6b;
  --text: #2c3e50;
  --light: rgba(255, 255, 255, 0.9);
  --dark: rgba(0, 0, 0, 0.8);
  --radius: 15px;
  --shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
  background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
  color: var(--text);
  line-height: 1.6;
  min-height: 100%;
  overflow-x: hidden;
}

.header {
  position: relative;
  height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2rem;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--primary), var(--light));
  z-index: -1;
  opacity: 0.6;
}

.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  z-index: 1000;
}

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

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

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

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

.brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.header-content {
  max-width: 800px;
  text-align: center;
  margin-top: 4rem;
}

.header-title {
  font-size: 3rem;
  margin-bottom: 1rem;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header-subtitle {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  opacity: 0.8;
}

.notice {
  background: var(--light);
  padding: 1rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin: 2rem auto;
  max-width: 800px;
  text-align: center;
  backdrop-filter: blur(5px);
}

.main {
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section {
  margin-bottom: 4rem;
  background: var(--light);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(5px);
  transition: var(--transition);
}

.section:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.section-title {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--primary);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 50px;
  height: 3px;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  border-radius: 3px;
}

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

.card {
  background: rgba(255, 255, 255, 0.7);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
  backdrop-filter: blur(5px);
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

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

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
}

.card-img:hover {
  transform: scale(1.02);
}

.feature-list {
  list-style: none;
  margin-top: 1rem;
}

.feature-list li {
  padding: 0.5rem 0;
  position: relative;
  padding-left: 1.5rem;
}

.feature-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--secondary);
  font-weight: bold;
}

pre {
  background: rgba(0, 0, 0, 0.8);
  color: #f8f8f2;
  padding: 1rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1.5rem 0;
  font-family: 'Courier New', monospace;
  box-shadow: var(--shadow);
}

code {
  font-family: 'Courier New', monospace;
  background: rgba(0, 0, 0, 0.1);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
}

.article {
  background: var(--light);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(5px);
  margin-bottom: 3rem;
}

.article h2 {
  font-size: 1.8rem;
  margin: 2rem 0 1rem;
  color: var(--primary);
}

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

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

.footer {
  background: linear-gradient(135deg, var(--primary), var(--dark));
  color: white;
  padding: 3rem 2rem;
  text-align: center;
  margin-top: 4rem;
}

.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(--secondary);
}

.particle {
  position: absolute;
  width: 5px;
  height: 5px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 50%;
  animation: float 4s infinite ease-in-out;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) translateX(0);
    opacity: 1;
  }
  50% {
    transform: translateY(-20px) translateX(10px);
    opacity: 0.7;
  }
}

@media (max-width: 768px) {
  .header-title {
    font-size: 2rem;
  }
  
  .header-subtitle {
    font-size: 1rem;
  }
  
  .nav-links {
    display: none;
  }
  
  .grid {
    grid-template-columns: 1fr;
  }
}