/* 基础样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Arial, 'Microsoft YaHei', sans-serif;
}
body {
  background-color: #f5f5f5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
 }
.content {
  flex: 1;
  padding: 40px 20px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}
h1 {
  margin-bottom: 20px;
  color: #333;
  text-align: center;
}
p {
  line-height: 1.6;
  margin-bottom: 15px;
  color: #555;
}