/* 全局样式与页面布局 */
body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(135deg, #0a0a2a, #1a0d4f, #2b0f74);
  color: #ffffff;
  line-height: 1.6;
  overflow-x: hidden;
}
h1, h2, h3 {
  font-family: 'Montserrat', sans-serif;
  font-weight: bold;
  color: #00ff99;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}
p {
  font-size: 1rem;
  color: #e0e0e0;
  padding: 0 10px;
}
a {
  color: #00ff99;
  text-decoration: none;
  transition: color 0.3s ease;
}
a:hover {
  color: #00cc77;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}
.grid-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}
.item {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
}
img {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  object-fit: cover;
}
pre {
  background: #1e1e1e;
  color: #00ff99;
  padding: 15px;
  border-radius: 5px;
  overflow-x: auto;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.9rem;
}
code {
  color: #00ff99;
}
.button {
  background-color: #007bff;
  border: none;
  color: white;
  padding: 10px 20px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  border-radius: 5px;
  box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
}
.button:hover {
  background-color: #0056b3;
  box-shadow: 4px 4px 10px rgba(0, 0, 0, 0.5);
}
@media (max-width: 768px) {
  .container {
    padding: 10px;
  }
  h1 {
    font-size: 24px;
  }
  .grid-section {
    grid-template-columns: 1fr;
  }
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in {
  animation: fadeIn 1s ease-out;
}