:root {
  --primary: #1e3c72;
  --secondary: #2a5298;
  --accent: #ff5722;
  --light: #ffffff;
  --dark: #0a1f44;
  --gray: #f5f7fa;
}

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

body {
  font-family: 'Roboto', sans-serif;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--light);
  line-height: 1.6;
  overflow-x: hidden;
}

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

.header {
  text-align: center;
  padding: 40px 0;
  position: relative;
}

.header::after {
  content: "这是一个网页样式设计参考";
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 14px;
  color: rgba(255,255,255,0.7);
}

.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(30, 60, 114, 0.95);
  backdrop-filter: blur(10px);
  display: flex;
  justify-content: center;
  padding: 15px 0;
  z-index: 1000;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

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

.nav-link {
  color: var(--light);
  text-decoration: none;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 20px;
  transition: all 0.3s ease;
  position: relative;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.1);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 30px;
  height: 2px;
  background: var(--accent);
  transition: transform 0.3s ease;
}

.nav-link:hover::after {
  transform: translateX(-50%) scaleX(1);
}

.main-content {
  padding-top: 100px;
  padding-bottom: 80px;
}

.article {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 20px;
  padding: 40px;
  margin-bottom: 60px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.article h2 {
  font-size: 32px;
  margin-bottom: 30px;
  color: var(--light);
  position: relative;
  padding-bottom: 15px;
}

.article h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 80px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.article h3 {
  font-size: 24px;
  margin: 30px 0 20px;
  color: var(--light);
}

.article p {
  margin-bottom: 20px;
  font-size: 17px;
}

.article color {
  color: var(--accent);
  font-weight: 500;
}

.pre-container {
  position: relative;
  margin: 30px 0;
  border-radius: 10px;
  overflow: hidden;
}

pre {
  background: var(--dark);
  padding: 20px;
  border-radius: 10px;
  overflow-x: auto;
  font-size: 15px;
  line-height: 1.5;
  position: relative;
}

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

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin: 40px 0;
}

.gallery-item {
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}

.gallery-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.footer {
  background: var(--dark);
  padding: 40px 0;
  text-align: center;
}

.footer p {
  color: rgba(255,255,255,0.7);
  font-size: 14px;
}

/* Animations */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.floating {
  animation: float 3s ease-in-out infinite;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    gap: 15px;
  }
  
  .article {
    padding: 30px 20px;
  }
  
  .article h2 {
    font-size: 28px;
  }
  
  .gallery {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  }
}

@media (max-width: 480px) {
  .nav-links {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }
  
  .article h2 {
    font-size: 24px;
  }
  
  .gallery {
    grid-template-columns: 1fr;
  }
}