/* CSS样式代码 */
body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #121212, #1c1c1c);
  color: #a6a6a6;
  line-height: 1.7;
  overflow-x: hidden;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}
header {
  position: fixed;
  top: 0;
  width: 100%;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.7));
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
}
nav a {
  color: #fff;
  text-decoration: none;
  font-size: 16px;
  margin-right: 20px;
  transition: all 0.3s ease;
}
nav a:hover {
  color: #007FFF;
  transform: scale(1.1);
}
main {
  margin-top: 80px;
  padding: 20px;
}
h1, h2, h3 {
  color: #fff;
  text-align: center;
  margin-bottom: 20px;
}
section {
  margin-bottom: 40px;
  padding: 20px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.5);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}
p {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 15px;
}
button {
  background: #007FFF;
  color: #fff;
  border: none;
  padding: 10px 20px;
  border-radius: 25px;
  cursor: pointer;
  transition: all 0.3s ease;
}
button:hover {
  background: #8A2BE2;
  box-shadow: 0 0 10px #8A2BE2;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}
th, td {
  border: 1px solid #8A2BE2;
  padding: 10px;
  text-align: left;
  color: #fff;
}
@media (max-width: 768px) {
  nav {
    flex-direction: column;
    text-align: center;
  }
  section {
    padding: 15px;
  }
}
@keyframes fadeIn {
  from {opacity: 0; transform: translateY(20px);}
  to {opacity: 1; transform: translateY(0);}
}