body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background-color: #FFFFFF;
  color: #333;
  text-align: center;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px;
  max-width: 800px;
  margin: auto;
}

.profile {
  display: flex;
  align-items: center;
}

.profile img {
  width: 32px;
  height: 32px;
  border-radius: 100%;
  margin-right: 3px;
}

nav ul {
  list-style: none;
  display: flex;
  padding: 0;
  gap: 15px;
}

nav ul li {
  display: inline;
}

nav ul li a {
  text-decoration: none;
  color: #333;
  font-weight: 400;
}

h1 a {
  font-size: 24px;
  font-weight: 300; /* 让 h1 不加粗 */
  color: inherit; /* 让颜色和 h1 一样 */
  text-decoration: none;
}

main {
  max-width: 600px;
  margin: 40px auto;
  font-weight: 400; /* 让 h1 不加粗 */
  padding: 20px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0);
}

.posts {
  margin-top: 20px;
}

article {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid #FFFFFF;
  padding: 10px 0;
}

article:last-child {
  border-bottom: none;
}

footer {
  margin-top: 20px;
  padding: 10px;
  background-color: #FFFFFF;
  color: white;
}

img {
  display: block; /* 确保图片不会隐藏 */
  width: 100%; /* 调整图片大小 */
  max-width: 500px; /* 限制图片宽度，防止过大 */
}