:root {
  --primary-gradient: linear-gradient(135deg, #0d47a1, #42a5f5);
  --secondary-gradient: linear-gradient(45deg, #42a5f5, #0d47a1);
  --accent-color: #ff7043;
  --text-light: #ffffff;
  --text-dark: #263238;
  --card-bg: rgba(255, 255, 255, 0.1);
  --section-padding: 80px 0;
}

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

body {
  background: var(--primary-gradient);
  font-family: 'Roboto', sans-serif;
  color: var(--text-light);
  line-height: 1.6;
  overflow-x: hidden;
}

.header-notice {
  text-align: center;
  padding: 15px;
  background: rgba(0, 0, 0, 0.2);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
}

.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(13, 71, 161, 0.9);
  padding: 15px 30px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  z-index: 1000;
  backdrop-filter: blur(5px);
}

.navbar-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-light);
  text-decoration: none;
}

.nav-menu {
  list-style: none;
  display: flex;
}

.nav-item {
  margin: 0 15px;
}

.nav-link {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 20px;
  transition: all 0.3s ease;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.2);
}

.main-container {
  max-width: 1200px;
  margin: 100px auto 0;
  padding: 0 20px;
}

.hero {
  text-align: center;
  padding: var(--section-padding);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(66, 165, 245, 0.1) 0%, transparent 70%);
  animation: rotate 20s linear infinite;
  z-index: -1;
}

@keyframes rotate {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 20px;
  background: linear-gradient(to right, #ffffff, #e0f7fa);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero p {
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto 30px;
  color: rgba(255, 255, 255, 0.9);
}

.hero-images {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-top: 50px;
}

.hero-image {
  width: 180px;
  height: 180px;
  border-radius: 20px;
  object-fit: cover;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
}

.hero-image:hover {
  transform: translateY(-10px) scale(1.05);
}

article {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 40px;
  margin: 50px 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

article h2 {
  font-size: 2.2rem;
  margin-bottom: 30px;
  color: var(--text-light);
  position: relative;
  padding-bottom: 15px;
}

article h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100px;
  height: 4px;
  background: var(--accent-color);
  border-radius: 2px;
}

article h3 {
  font-size: 1.8rem;
  margin: 40px 0 20px;
  color: var(--text-light);
}

article p {
  margin-bottom: 20px;
  font-size: 1.1rem;
  line-height: 1.8;
}

pre {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 10px;
  padding: 20px;
  margin: 30px 0;
  overflow-x: auto;
  border-left: 4px solid var(--accent-color);
}

code {
  font-family: 'Courier New', monospace;
  color: #e0f7fa;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin: 40px 0;
}

.grid-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: 15px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.grid-image:hover {
  transform: scale(1.03);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.footer {
  text-align: center;
  padding: 30px;
  margin-top: 50px;
  background: rgba(0, 0, 0, 0.2);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

@media (max-width: 992px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero-images {
    flex-wrap: wrap;
  }
}

@media (max-width: 768px) {
  .navbar-container {
    flex-direction: column;
  }
  
  .nav-menu {
    margin-top: 15px;
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .nav-item {
    margin: 5px 10px;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  article {
    padding: 30px;
  }
}

@media (max-width: 576px) {
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .hero-image {
    width: 120px;
    height: 120px;
  }
  
  article {
    padding: 20px;
  }
  
  article h2 {
    font-size: 1.8rem;
  }
  
  article h3 {
    font-size: 1.5rem;
  }
}