:root {
  --bg: #ffffff;
  --text: #222222;
  --muted: #6b7280;
  --line: #e6e8eb;
  --link: #2563a8;
  --link-hover: #17406f;
  --soft: #f7f8fa;
  --max: 860px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
  color: var(--text);
  font-family: Georgia, "Times New Roman", "Noto Serif CJK SC", "Songti SC",
    SimSun, serif;
  font-size: 17px;
  line-height: 1.8;
}

body {
  margin: 0;
}

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

a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

.container {
  margin: 0 auto;
  max-width: var(--max);
  padding: 36px 22px 56px;
}

.site-header {
  border-bottom: 1px solid var(--line);
  margin-bottom: 42px;
  padding-bottom: 28px;
  text-align: center;
}

.site-name {
  color: var(--text);
  display: inline-block;
  font-size: clamp(2rem, 6vw, 3.4rem);
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.2;
  margin-bottom: 12px;
}

.site-name:hover {
  text-decoration: none;
}

.tagline {
  color: var(--muted);
  margin: 0 auto 16px;
  max-width: 680px;
}

.site-nav {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 22px;
  justify-content: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
    sans-serif;
  font-size: 0.94rem;
}

.site-nav a[aria-current="page"] {
  color: var(--text);
  font-weight: 700;
}

.site-search {
  align-items: center;
  border: 1px solid var(--line);
  display: flex;
  margin: 18px auto 0;
  max-width: 360px;
  min-height: 42px;
  padding: 0 8px 0 14px;
}

.site-search input,
.search-panel input {
  appearance: none;
  background: transparent;
  border: 0;
  color: var(--text);
  flex: 1;
  font: 0.94rem/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
  min-width: 0;
  outline: none;
}

.site-search button {
  align-items: center;
  background: transparent;
  border: 0;
  color: var(--muted);
  cursor: pointer;
  display: inline-flex;
  height: 32px;
  justify-content: center;
  padding: 0;
  width: 32px;
}

.site-search button:hover {
  color: var(--link);
}

.site-search svg {
  fill: none;
  height: 18px;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
  width: 18px;
}

.sr-only {
  clip: rect(0 0 0 0);
  border: 0;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

.intro {
  margin: 0 auto 42px;
  max-width: 760px;
  text-align: center;
}

.intro h1,
.page-title h1,
.article h1 {
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  letter-spacing: 0;
  line-height: 1.35;
  margin: 0 0 16px;
}

.intro p,
.page-title p {
  color: var(--muted);
  margin: 0;
}

.section-header {
  align-items: baseline;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
}

.section-header h2,
.note h2,
.article h2 {
  font-size: 1.2rem;
  margin: 0;
}

.section-header a {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
    sans-serif;
  font-size: 0.88rem;
}

.post-list {
  list-style: none;
  margin: 0 0 42px;
  padding: 0;
}

.post-list li {
  align-items: baseline;
  border-bottom: 1px dotted var(--line);
  display: grid;
  gap: 12px;
  grid-template-columns: 170px 1fr;
  padding: 11px 0;
}

.post-list time {
  color: var(--muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
    sans-serif;
  font-size: 0.9rem;
  white-space: nowrap;
}

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

.post-list a:hover {
  color: var(--link);
}

.search-panel {
  align-items: center;
  border: 1px solid var(--line);
  display: flex;
  gap: 10px;
  margin: 0 auto 16px;
  max-width: 620px;
  min-height: 48px;
  padding: 0 8px 0 16px;
}

.search-panel button {
  background: var(--text);
  border: 1px solid var(--text);
  color: #fff;
  cursor: pointer;
  font: 0.92rem/1 -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
  min-height: 34px;
  padding: 0 16px;
}

.search-panel button:hover {
  background: var(--link);
  border-color: var(--link);
}

.search-status {
  color: var(--muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
    sans-serif;
  font-size: 0.92rem;
  margin: 0 auto 12px;
  max-width: 620px;
}

.search-results {
  list-style: none;
  margin: 0 auto;
  max-width: 620px;
  padding: 0;
}

.search-results li {
  border-bottom: 1px dotted var(--line);
  padding: 14px 0;
}

.search-results time {
  color: var(--muted);
  display: block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
    sans-serif;
  font-size: 0.88rem;
  margin-bottom: 2px;
}

.search-results a {
  color: var(--text);
  font-size: 1.08rem;
}

.search-results a:hover {
  color: var(--link);
}

.search-results p {
  color: var(--muted);
  font-size: 0.96rem;
  margin: 4px 0 0;
}

.links-page {
  margin: 0 auto;
  max-width: 760px;
}

.friend-links {
  display: grid;
  gap: 14px;
}

.friend-link {
  border-bottom: 1px dotted var(--line);
  color: var(--text);
  display: grid;
  gap: 2px;
  padding: 14px 0;
}

.friend-link:hover {
  color: var(--link);
  text-decoration: none;
}

.friend-name {
  font-size: 1.12rem;
  font-weight: 700;
}

.friend-url,
.friend-desc {
  color: var(--muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
    sans-serif;
  font-size: 0.92rem;
}

.note {
  background: var(--soft);
  border-left: 3px solid var(--line);
  margin: 30px 0 0;
  padding: 18px 22px;
}

.note p {
  margin: 8px 0 0;
}

.page-title {
  margin-bottom: 26px;
  text-align: center;
}

.article {
  margin: 0 auto;
  max-width: 760px;
}

.article .meta {
  color: var(--muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
    sans-serif;
  margin: 0 0 6px;
}

.article p {
  margin: 0 0 18px;
}

.article code {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 4px;
  font-family: Consolas, "SFMono-Regular", monospace;
  font-size: 0.9em;
  padding: 0.1em 0.25em;
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
    sans-serif;
  font-size: 0.9rem;
  margin-top: 52px;
  padding-top: 22px;
  text-align: center;
}

@media (max-width: 640px) {
  html {
    font-size: 16px;
  }

  .container {
    padding: 28px 18px 44px;
  }

  .site-header {
    margin-bottom: 32px;
  }

  .site-search,
  .search-panel {
    max-width: 100%;
  }

  .post-list li {
    display: block;
    padding: 13px 0;
  }

  .post-list time {
    display: block;
    margin-bottom: 2px;
  }
}