:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #17202a;
  --muted: #667085;
  --line: #d9e0e8;
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --green: #0f766e;
  --code-bg: #101828;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-strong);
}

.wrap {
  width: min(100% - 32px, 960px);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 248, 250, 0.92);
  backdrop-filter: blur(16px);
}

.header-inner {
  display: flex;
  min-height: 64px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.site-title {
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 800;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.95rem;
}

.site-nav a {
  color: var(--muted);
}

.site-nav a:hover {
  color: var(--text);
}

.site-main {
  padding: 48px 0 72px;
}

.intro {
  margin-bottom: 34px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.eyebrow,
.article-header time,
.post-card time {
  margin: 0 0 8px;
  color: var(--green);
  font-size: 0.92rem;
  font-weight: 700;
}

.intro h1 {
  max-width: 780px;
  margin: 0;
  font-size: 2.25rem;
  line-height: 1.22;
}

.intro p:last-child {
  max-width: 720px;
  margin: 16px 0 0;
  color: var(--muted);
}

.post-list {
  display: grid;
  gap: 18px;
}

.post-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.post-card h2 {
  margin: 0 0 10px;
  font-size: 1.35rem;
  line-height: 1.35;
}

.post-card h2 a {
  color: var(--text);
}

.excerpt {
  color: var(--muted);
}

.read-more {
  display: inline-block;
  margin-top: 12px;
  font-weight: 700;
}

.article,
.archive {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.article-header {
  margin-bottom: 26px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.article-header h1,
.archive h1 {
  margin: 0;
  font-size: 2rem;
  line-height: 1.28;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.tags a {
  color: var(--muted);
  font-size: 0.92rem;
}

.article-content p,
.article-content ul,
.article-content ol {
  margin: 0 0 1.1em;
}

.article-content h2,
.article-content h3 {
  margin: 1.6em 0 0.7em;
  line-height: 1.35;
}

.article-content blockquote {
  margin: 1.4em 0;
  padding: 0 0 0 18px;
  border-left: 4px solid var(--accent);
  color: var(--muted);
}

.article-content code {
  padding: 0.12em 0.35em;
  border-radius: 4px;
  background: #e8edf5;
  font-family: Consolas, "SFMono-Regular", monospace;
}

.article-content pre {
  overflow-x: auto;
  padding: 18px;
  border-radius: 8px;
  background: var(--code-bg);
  color: #eef2ff;
}

.article-content pre code {
  padding: 0;
  background: transparent;
}

.archive h2 {
  margin: 28px 0 10px;
  font-size: 1.25rem;
}

.archive-list {
  display: grid;
  gap: 8px;
}

.archive-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  color: var(--text);
}

.archive-item time {
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer .wrap {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

@media (max-width: 680px) {
  .header-inner,
  .site-footer .wrap {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 14px 0;
  }

  .site-main {
    padding-top: 32px;
  }

  .intro h1,
  .article-header h1,
  .archive h1 {
    font-size: 1.65rem;
  }

  .article,
  .archive,
  .post-card {
    padding: 20px;
  }

  .archive-item {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}