:root {
  --bg: #fdfdfc;
  --fg: #23211e;
  --muted: #6b6560;
  --line: #e6e2dc;
  --link: #1f6f5c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.75 -apple-system, BlinkMacSystemFont, "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* 顶部 */
.site-header {
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 60px;
  flex-wrap: wrap;
  gap: 8px;
}
.logo { font-size: 18px; font-weight: 600; color: var(--fg); }
.site-header nav a {
  margin-left: 18px;
  color: var(--muted);
  font-size: 15px;
}
.site-header nav a:first-child { margin-left: 0; }

/* 首屏 */
.hero { padding: 48px 0 28px; border-bottom: 1px solid var(--line); }
.hero h1 { margin: 0 0 8px; font-size: 30px; letter-spacing: .5px; }
.hero .sub { margin: 0; color: var(--muted); }

/* 文章列表 */
.posts { padding: 28px 0 40px; }
.posts h2 { font-size: 18px; margin: 0 0 20px; color: var(--muted); font-weight: 600; }
.post-item { padding: 18px 0; border-bottom: 1px solid var(--line); }
.post-item:last-child { border-bottom: none; }
.post-item h3 { margin: 0 0 6px; font-size: 18px; }
.post-item h3 a { color: var(--fg); }
.meta { margin: 0 0 8px; font-size: 13px; color: var(--muted); }
.excerpt { margin: 0; color: #4a4640; }

/* 正文页 */
.article { padding: 36px 0 48px; }
.article h1 { font-size: 26px; margin: 0 0 8px; }
.article h2 { font-size: 19px; margin: 30px 0 10px; }
.article p, .article li { color: #3b3833; }
.article code {
  background: #f2efea;
  padding: 2px 5px;
  border-radius: 3px;
  font-size: 14px;
}
.article pre {
  background: #f7f5f1;
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 14px;
  overflow-x: auto;
}
.article pre code { background: none; padding: 0; }
.back { display: inline-block; margin-top: 28px; font-size: 14px; }

/* 底部 */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 22px 0 32px;
  color: var(--muted);
  font-size: 13px;
  background: #fff;
}
.site-footer p { margin: 4px 0; }
.site-footer .icp a { color: var(--muted); }

@media (max-width: 520px) {
  .hero { padding: 34px 0 22px; }
  .hero h1 { font-size: 25px; }
}