:root {
  --primary: #1E90FF;
  --secondary: #FF8C00;
  --bg-gradient: linear-gradient(135deg, #F5F7FA 0%, #E1E8EB 100%);
  --text: #333;
  --light: #fff;
  --shadow: 0 4px 20px rgba(0,0,0,0.1);
  --radius: 12px;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

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

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 120px 40px 60px;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--primary);
  color: var(--light);
  padding: 20px 40px;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  transition: var(--transition);
}

header.scrolled {
  background: rgba(30, 144, 255, 0.95);
  backdrop-filter: blur(5px);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  display: flex;
  align-items: center;
}

.logo svg {
  margin-right: 10px;
}

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

.nav-links li {
  margin-left: 30px;
}

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

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

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

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

.hero {
  text-align: center;
  padding: 80px 0;
  position: relative;
}

.hero h1 {
  font-size: 48px;
  margin-bottom: 20px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: fadeInUp 1s ease;
}

.hero p {
  font-size: 20px;
  max-width: 800px;
  margin: 0 auto 40px;
  color: #555;
}

.notice {
  background: rgba(255,255,255,0.9);
  padding: 15px;
  border-radius: var(--radius);
  margin: 0 auto 40px;
  max-width: 600px;
  box-shadow: var(--shadow);
  text-align: center;
  font-size: 14px;
  color: #666;
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 30px;
  margin-bottom: 60px;
}

article {
  grid-column: span 8;
  background: var(--light);
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

article::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background: linear-gradient(to bottom, var(--primary), var(--secondary));
}

article h2 {
  font-size: 32px;
  margin-bottom: 30px;
  color: var(--primary);
}

article h3 {
  font-size: 24px;
  margin: 40px 0 20px;
  color: var(--secondary);
}

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

.sidebar {
  grid-column: span 4;
}

.card {
  background: var(--light);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 30px;
  margin-bottom: 30px;
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.card h3 {
  color: var(--primary);
  margin-bottom: 20px;
  font-size: 20px;
}

.card p {
  color: #666;
  font-size: 15px;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 30px 0;
}

.image-wrapper {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
}

.image-wrapper:hover {
  transform: scale(1.03);
}

.image-wrapper img {
  width: 100%;
  height: auto;
  display: block;
  transition: var(--transition);
}

.image-wrapper:hover img {
  transform: scale(1.1);
}

pre {
  background: #2d2d2d;
  color: #f8f8f2;
  padding: 20px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 30px 0;
  font-size: 15px;
  line-height: 1.5;
  box-shadow: var(--shadow);
}

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

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 40px;
}

.tag {
  background: rgba(30, 144, 255, 0.1);
  color: var(--primary);
  padding: 5px 15px;
  border-radius: 20px;
  font-size: 14px;
  transition: var(--transition);
}

.tag:hover {
  background: var(--primary);
  color: var(--light);
}

footer {
  text-align: center;
  padding: 40px 0;
  color: #666;
  font-size: 14px;
}

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

@media (max-width: 1200px) {
  .grid {
    grid-template-columns: 1fr;
  }
  article, .sidebar {
    grid-column: span 1;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 100px 20px 40px;
  }
  .hero h1 {
    font-size: 36px;
  }
  .nav-links {
    display: none;
  }
  article {
    padding: 30px 20px;
  }
}