/* 参考 GitHub Pages Minimal 主题：左栏固定 + 右侧正文，纯文字极简 */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 50px;
  background: #fff;
  font: 16px/1.7 "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans",
    Helvetica, Arial, sans-serif;
  color: #555;
}

.wrapper {
  width: 920px;
  margin: 0 auto;
}

/* 左侧固定栏 */
header {
  width: 300px;
  float: left;
  position: fixed;
}

header img.avatar {
  display: block;
  width: 100%;
  max-width: 300px;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 6px;
  margin: 0 0 16px;
}

header h1 {
  margin: 0 0 8px;
  font-size: 34px;
  color: #222;
  line-height: 1.1;
}

header p.view {
  margin: 0 0 14px;
  color: #555;
  font-size: 15px;
}

header p.links {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
}

header a {
  color: #267cb9;
  text-decoration: none;
}

header a:hover {
  color: #069;
  font-weight: bold;
}

/* 右侧正文 */
section {
  width: 560px;
  float: right;
}

h2 {
  margin: 26px 0 10px;
  font-size: 22px;
  color: #333;
  line-height: 1.2;
  border-bottom: 1px solid #e5e5e5;
  padding-bottom: 6px;
}

h2:first-child {
  margin-top: 0;
}

h3 {
  margin: 18px 0 6px;
  font-size: 17px;
  color: #444;
}

p {
  margin: 0 0 14px;
}

ul {
  margin: 0 0 14px;
  padding-left: 22px;
}

li {
  margin-bottom: 6px;
}

a {
  color: #267cb9;
  text-decoration: none;
}

a:hover {
  color: #069;
}

p.tags {
  margin-top: -6px;
  font-size: 14px;
  color: #888;
}

footer {
  clear: both;
  padding-top: 24px;
  color: #888;
}

/* 移动端：左栏与正文堆叠 */
@media (max-width: 960px) {
  .wrapper {
    width: auto;
    margin: 0;
  }

  header,
  section,
  footer {
    float: none;
    position: static;
    width: auto;
  }

  header {
    padding-bottom: 18px;
  }

  section {
    padding: 20px 0;
    border-top: 1px solid #e5e5e5;
  }
}

@media (max-width: 600px) {
  body {
    padding: 24px 16px;
  }
}