:root {
  --ccn-ink: #19221f;
  --ccn-muted: #58635f;
  --ccn-paper: #fbfaf6;
  --ccn-surface: #ffffff;
  --ccn-line: #d9ddd9;
  --ccn-focus: #9f351f;
  --ccn-shadow: 0 12px 32px rgba(19, 38, 31, 0.08);
  --ccn-shell: 1180px;
  --ccn-reading: 760px;
  --ccn-radius: 6px;
  --ccn-space-1: 0.5rem;
  --ccn-space-2: 1rem;
  --ccn-space-3: 1.5rem;
  --ccn-space-4: 2rem;
  --ccn-space-5: 3rem;
  --ccn-space-6: 4rem;
  --ccn-sans: ui-sans-serif, "Noto Sans CJK SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --ccn-serif: ui-serif, "Noto Serif CJK SC", "Noto Serif SC", "Songti SC", "STSong", serif;
  --ccn-z-sticky: 100;
}
.ccn-lang-zh-hant {
  --ccn-sans: ui-sans-serif, "Noto Sans CJK TC", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  --ccn-serif: ui-serif, "Noto Serif CJK TC", "Noto Serif TC", "Songti TC", "PMingLiU", serif;
}

* { box-sizing: border-box; }
html { color-scheme: light; scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-wrap: break-word;
  background: var(--ccn-paper);
  color: var(--ccn-ink);
  font-family: var(--ccn-sans);
  font-size: 1rem;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-tap-highlight-color: rgba(180, 71, 47, 0.18);
}
img { display: block; max-width: 100%; height: auto; }
figure { margin: 0; }
a { color: var(--ccn-primary); text-underline-offset: 0.18em; }
a:hover { color: var(--ccn-accent); }
button, input, textarea, select { font: inherit; }
button, a { touch-action: manipulation; }
:focus-visible { outline: 3px solid var(--ccn-focus); outline-offset: 3px; }
h1, h2, h3 { margin: 0 0 var(--ccn-space-2); line-height: 1.25; text-wrap: balance; }
h1 { font-size: clamp(2rem, 7vw, 4.75rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); }
h3 { font-size: 1.25rem; }
h1[id], h2[id], h3[id] { scroll-margin-top: 1.5rem; }
p { margin: 0 0 var(--ccn-space-2); }
.site-shell { width: min(var(--ccn-shell), calc(100% - 2rem)); margin-inline: auto; }
.site-main { min-height: 60dvh; }

.skip-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  margin: 0.25rem 1rem;
  padding: 0 var(--ccn-space-2);
  border: 1px solid var(--ccn-line);
  background: var(--ccn-surface);
  color: var(--ccn-ink);
  font-size: 0.875rem;
}
.site-header { position: relative; border-bottom: 1px solid var(--ccn-line); background: var(--ccn-surface); }
.header-layout { display: flex; align-items: center; justify-content: space-between; gap: var(--ccn-space-2); padding-block: var(--ccn-space-2); }
.site-brand { min-width: 0; }
.site-name, .footer-name { color: var(--ccn-ink); font-size: 1.4rem; font-weight: 700; text-decoration: none; }
.site-tagline { margin: 0; color: var(--ccn-muted); font-size: 0.875rem; }
.custom-logo { width: auto; max-height: 56px; }
.header-search-link, .button-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1rem;
  border: 1px solid var(--ccn-primary);
  border-radius: var(--ccn-radius);
  color: var(--ccn-primary);
  font-weight: 650;
  text-decoration: none;
  white-space: nowrap;
}
.primary-navigation { border-top: 1px solid var(--ccn-line); }
.nav-scroll { overflow-x: auto; scrollbar-width: thin; }
.primary-navigation .menu { display: flex; width: max-content; min-width: 100%; gap: 0.25rem; margin: 0; padding: 0; list-style: none; }
.primary-navigation .menu a { display: flex; min-height: 48px; align-items: center; padding: 0 var(--ccn-space-2); color: var(--ccn-ink); font-weight: 550; text-decoration: none; }
.primary-navigation .menu a:hover, .primary-navigation .current-menu-item > a, .primary-navigation .current_page_item > a { color: var(--ccn-accent); text-decoration: underline; }

.home-hero { border-bottom: 1px solid var(--ccn-line); background: var(--ccn-soft); }
.hero-grid { display: grid; gap: var(--ccn-space-4); padding-block: var(--ccn-space-5); }
.hero-copy { min-width: 0; max-width: 780px; }
.eyebrow, .section-heading > p { margin-bottom: var(--ccn-space-1); color: var(--ccn-accent); font-size: 0.82rem; font-weight: 750; letter-spacing: 0.08em; }
.hero-description { max-width: 45rem; color: var(--ccn-muted); font-size: clamp(1.05rem, 2.5vw, 1.35rem); }
.hero-search { align-self: end; padding: var(--ccn-space-3); border-top: 4px solid var(--ccn-accent); background: var(--ccn-surface); box-shadow: var(--ccn-shadow); }
.search-form label { display: block; margin-bottom: var(--ccn-space-1); font-weight: 650; }
.search-controls { display: flex; gap: var(--ccn-space-1); }
.search-controls input { min-width: 0; min-height: 48px; flex: 1; padding: 0.65rem 0.8rem; border: 1px solid #7b8581; border-radius: var(--ccn-radius); background: var(--ccn-surface); color: var(--ccn-ink); }
.search-controls button { min-height: 48px; padding: 0.65rem 1.2rem; border: 0; border-radius: var(--ccn-radius); background: var(--ccn-primary); color: #fff; font-weight: 700; cursor: pointer; }
.search-controls button { transition: opacity 180ms cubic-bezier(.2,.8,.2,1); }
.search-controls button:hover, .search-controls button:active { opacity: 0.86; }

@media (max-width: 479px) {
  .search-controls { flex-direction: column; }
  .search-controls button { width: 100%; }
  .hero-description { overflow-wrap: anywhere; }
}

.topic-rail { display: grid; gap: var(--ccn-space-1); padding-block: var(--ccn-space-3); border-bottom: 1px solid var(--ccn-line); }
.topic-rail > span { font-weight: 700; }
.topic-rail ul { display: flex; gap: 0.5rem 1.25rem; margin: 0; padding: 0; overflow-x: auto; list-style: none; }
.topic-rail a { display: flex; min-height: 44px; align-items: center; white-space: nowrap; }
.home-feed, .listing-layout, .article-shell, .error-layout { padding-block: var(--ccn-space-5); }
.section-heading, .listing-header { margin-bottom: var(--ccn-space-4); }
.listing-header { max-width: 820px; }
.post-grid { display: grid; gap: var(--ccn-space-4); }
.content-card { min-width: 0; border-bottom: 1px solid var(--ccn-line); padding-bottom: var(--ccn-space-4); }
.card-media { display: block; margin-bottom: var(--ccn-space-2); background: var(--ccn-soft); }
.card-media img { width: 100%; aspect-ratio: 8 / 5; object-fit: cover; }
.card-topic { display: inline-flex; min-height: 36px; align-items: center; margin-bottom: 0.25rem; color: var(--ccn-accent); font-size: 0.82rem; font-weight: 700; text-decoration: none; }
.card-title { font-size: clamp(1.25rem, 2.8vw, 1.75rem); }
.card-title a { color: var(--ccn-ink); text-decoration: none; }
.entry-meta { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: var(--ccn-space-2); color: var(--ccn-muted); font-size: 0.875rem; }
.entry-meta a { color: inherit; }
.card-excerpt { color: var(--ccn-muted); }
.text-link { display: inline-flex; min-height: 44px; align-items: center; font-weight: 700; }

.breadcrumbs { margin-bottom: var(--ccn-space-4); font-size: 0.875rem; }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0; padding: 0; list-style: none; }
.breadcrumbs li:not(:last-child)::after { margin-inline-start: 0.4rem; color: var(--ccn-muted); content: "/"; }
.article-layout { display: grid; gap: var(--ccn-space-5); }
.article-main { min-width: 0; max-width: var(--ccn-reading); }
.article-header { margin-bottom: var(--ccn-space-4); }
.article-header h1 { font-size: clamp(2rem, 6vw, 3.8rem); }
.article-hero { margin-bottom: var(--ccn-space-4); }
.article-hero img { width: 100%; }
.entry-content { font-size: clamp(1.04rem, 1.8vw, 1.125rem); }
.entry-content > * { max-width: 100%; }
.entry-content h2, .entry-content h3 { margin-top: var(--ccn-space-5); }
.entry-content a { text-decoration-thickness: 0.08em; }
.entry-content blockquote { margin: var(--ccn-space-4) 0; padding: var(--ccn-space-2) var(--ccn-space-3); border-inline-start: 4px solid var(--ccn-accent); background: var(--ccn-soft); font-family: var(--ccn-serif); font-size: 1.2em; }
.entry-content table { display: block; max-width: 100%; overflow-x: auto; border-collapse: collapse; }
.entry-content th, .entry-content td { padding: 0.65rem; border: 1px solid var(--ccn-line); text-align: start; }
.author-box, .comments-area, .widget, .error-panel { margin-top: var(--ccn-space-5); padding: var(--ccn-space-3); border-top: 4px solid var(--ccn-primary); background: var(--ccn-surface); }
.author-name { font-weight: 700; }
.post-navigation { margin-top: var(--ccn-space-5); }
.post-navigation .nav-links { display: grid; gap: var(--ccn-space-2); }
.post-navigation a { display: grid; min-height: 72px; align-content: center; padding: var(--ccn-space-2); border: 1px solid var(--ccn-line); text-decoration: none; }
.post-navigation span { color: var(--ccn-muted); font-size: 0.8rem; }
.article-sidebar ul { margin: 0; padding-inline-start: 1.2rem; }
.article-sidebar a { display: inline-flex; min-height: 40px; align-items: center; }
.pagination { margin-top: var(--ccn-space-5); }
.nav-links { display: flex; flex-wrap: wrap; gap: var(--ccn-space-1); }
.page-numbers { display: inline-flex; min-width: 44px; min-height: 44px; align-items: center; justify-content: center; padding: 0.4rem; border: 1px solid var(--ccn-line); text-decoration: none; }
.page-numbers.current { border-color: var(--ccn-primary); background: var(--ccn-primary); color: #fff; }
.empty-state, .error-panel { max-width: 720px; }
.error-code { margin: 0; color: var(--ccn-accent); font-size: clamp(4rem, 20vw, 9rem); font-weight: 800; line-height: 1; }
.button-link { margin-top: var(--ccn-space-2); background: var(--ccn-primary); color: #fff; }
.button-link:hover, .button-link:active { color: #fff; opacity: 0.88; }

.site-footer { margin-top: var(--ccn-space-6); border-top: 1px solid var(--ccn-line); background: #17231f; color: #e9eeeb; }
.footer-layout { display: grid; gap: var(--ccn-space-3); padding-block: var(--ccn-space-5); }
.site-footer .footer-name, .site-footer a { color: #fff; }
.footer-navigation ul { display: flex; flex-wrap: wrap; gap: var(--ccn-space-1) var(--ccn-space-3); margin: 0; padding: 0; list-style: none; }
.footer-navigation a { display: inline-flex; min-height: 44px; align-items: center; }
.copyright { margin: 0; color: #c2cbc6; font-size: 0.875rem; }

@media (min-width: 768px) {
  .site-shell { width: min(var(--ccn-shell), calc(100% - 3rem)); }
  .hero-grid { grid-template-columns: minmax(0, 1.65fr) minmax(280px, 0.75fr); padding-block: var(--ccn-space-6); }
  .topic-rail { grid-template-columns: auto 1fr; align-items: center; }
  .post-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .post-navigation .nav-links { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-layout { grid-template-columns: 1.2fr 1fr; }
  .copyright { grid-column: 1 / -1; }
}

@media (min-width: 1024px) {
  .header-layout { padding-block: var(--ccn-space-3); }
  .article-layout { grid-template-columns: minmax(0, var(--ccn-reading)) minmax(220px, 1fr); align-items: start; }
  .article-sidebar { position: sticky; top: var(--ccn-space-3); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}