/* 全局 */
body {
  margin: 0;
  font-family: "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.6;
  background: #f9f9f9;
  color: #333;
}

/* 页头 */
header {
  background: linear-gradient(90deg, #4a90e2, #007aff);
  color: white;
  padding: 20px 40px;
}

header h1 {
  margin: 0;
  font-size: 28px;
}

/* 导航栏 */
nav {
  margin-top: 10px;
}

nav a {
  color: white;
  text-decoration: none;
  margin-right: 20px;
  font-weight: bold;
  transition: color 0.3s;
}

nav a:hover {
  color: #ffe082;
}

/* 页面主体 */
main {
  padding: 40px;
  max-width: 1000px;
  margin: auto;
  background: white;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  border-radius: 8px;
}

main h2 {
  border-left: 5px solid #4a90e2;
  padding-left: 10px;
  color: #4a90e2;
}

/* 图片 */
main img {
  margin: 15px;
  border-radius: 6px;
  box-shadow: 0 3px 8px rgba(0,0,0,0.1);
  transition: transform 0.3s;
}

main img:hover {
  transform: scale(1.05);
}

/* 列表 */
ul {
  padding-left: 20px;
}

ul li {
  margin-bottom: 8px;
}

/* 页脚 */
footer {
  text-align: center;
  padding: 20px;
  background: #333;
  color: #ccc;
  margin-top: 40px;
}
footer p {
  margin: 0;
}