:root {
  --primary-dark: #1e3c72;
  --primary: #2a5298;
  --primary-light: #4a6da7;
  --accent: #ff7f50;
  --accent-dark: #ff5722;
  --text: #f5f5f5;
  --text-secondary: #e0e0e0;
  --bg: #0a192f;
  --card-bg: rgba(30, 60, 114, 0.2);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
  font-family: 'Roboto', sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  background-size: 400% 400%;
  animation: gradientBG 15s ease infinite;
  padding-top: 80px;
}

@keyframes gradientBG {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

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

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(10, 25, 47, 0.9);
  backdrop-filter: blur(10px);
  z-index: 1000;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
}

.nav-logo span {
  color: var(--accent);
}

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

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  padding: 5px 0;
}

.nav-link:hover {
  color: var(--text);
}

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

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

.banner {
  text-align: center;
  padding: 60px 0;
  margin-bottom: 40px;
  position: relative;
}

.banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, rgba(255, 127, 80, 0.1) 0%, transparent 70%);
  z-index: -1;
}

.banner h1 {
  font-size: 2.5rem;
  margin-bottom: 20px;
  background: linear-gradient(90deg, var(--text), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: textGlow 2s ease-in-out infinite alternate;
}

@keyframes textGlow {
  from { text-shadow: 0 0 5px rgba(255, 255, 255, 0.3); }
  to { text-shadow: 0 0 15px rgba(255, 127, 80, 0.5); }
}

.banner p {
  font-size: 1.1rem;
  max-width: 700px;
  margin: 0 auto 30px;
  color: var(--text-secondary);
}

.notice {
  background: rgba(255, 255, 255, 0.1);
  padding: 15px;
  border-radius: 8px;
  margin-bottom: 40px;
  border-left: 4px solid var(--accent);
  font-size: 0.9rem;
}

.content-section {
  margin-bottom: 60px;
}

.section-title {
  font-size: 1.8rem;
  margin-bottom: 30px;
  position: relative;
  padding-bottom: 10px;
  color: var(--text);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 80px;
  height: 3px;
  background: var(--accent);
  border-radius: 3px;
}

.card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 30px;
  margin-bottom: 30px;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.card-title {
  font-size: 1.3rem;
  margin-bottom: 15px;
  color: var(--text);
}

.card-content {
  color: var(--text-secondary);
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.image-card {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 1/1;
  transition: var(--transition);
}

.image-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.image-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.image-card:hover img {
  transform: scale(1.05);
}

.image-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, transparent 60%, rgba(0, 0, 0, 0.7)));
}

pre {
  background: rgba(10, 25, 47, 0.7);
  border-radius: 8px;
  padding: 20px;
  margin: 20px 0;
  overflow-x: auto;
  border-left: 4px solid var(--accent);
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  color: #f8f8f2;
  tab-size: 4;
}

code {
  font-family: 'Courier New', monospace;
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 5px;
  border-radius: 3px;
  font-size: 0.9rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  background: rgba(10, 25, 47, 0.7);
  border-radius: 8px;
  overflow: hidden;
}

th, td {
  padding: 15px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

th {
  background: rgba(30, 60, 114, 0.5);
  color: var(--text);
  font-weight: 500;
}

tr:hover {
  background: rgba(255, 255, 255, 0.05);
}

.footer {
  text-align: center;
  padding: 30px 0;
  margin-top: 60px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    gap: 20px;
  }
  
  .nav-menu {
    flex-direction: column;
    gap: 15px;
    align-items: center;
  }
  
  .banner h1 {
    font-size: 2rem;
  }
  
  .image-grid {
    grid-template-columns: 1fr;
  }
}

.tabs {
  display: flex;
  margin-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.tab-btn {
  padding: 10px 20px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  position: relative;
  font-weight: 500;
  transition: var(--transition);
}

.tab-btn.active {
  color: var(--text);
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent);
}

.tab-btn:hover {
  color: var(--text);
}

.tab-content {
  display: none;
  animation: fadeIn 0.5s ease;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.button {
  display: inline-block;
  padding: 12px 24px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 6px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  text-align: center;
}

.button:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(255, 87, 34, 0.3);
}

.highlight-box {
  background: rgba(255, 127, 80, 0.1);
  border-left: 4px solid var(--accent);
  padding: 20px;
  margin: 20px 0;
  border-radius: 0 8px 8px 0;
}

.highlight-box h3 {
  color: var(--accent);
  margin-bottom: 10px;
}