/* =============================================
   cookframe技术 — 极致简约 · 暖色系
   ============================================= */

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Warm color palette */
  --color-primary: #D97706;
  --color-primary-hover: #B45309;
  --color-primary-light: #FFFBEB;
  --color-primary-subtle: #FEF3C7;

  --color-bg: #FAFAF9;
  --color-surface: #FFFFFF;
  --color-surface-hover: #F5F5F4;

  --color-text: #1C1917;
  --color-text-secondary: #78716C;
  --color-text-muted: #A8A29E;

  --color-border: #E7E5E4;
  --color-border-light: #F0EFEE;

  --color-accent: #EA580C;

  /* Typography */
  --font-heading: 'Noto Serif SC', 'Georgia', serif;
  --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Cascadia Code', 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Layout */
  --max-width: 1200px;
  --content-width: 800px;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-lg: 0 4px 20px rgba(0,0,0,0.08);

  /* Transitions */
  --transition: 200ms ease;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--color-primary-hover);
}

img {
  max-width: 100%;
  height: auto;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border-light);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-text);
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}

.logo-badge {
  font-size: 0.75rem;
  padding: 0.1rem 0.4rem;
  background: var(--color-primary-subtle);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.site-nav {
  display: flex;
  gap: var(--space-xl);
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: var(--space-xs) 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* Mobile nav */
.mobile-nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.mobile-nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---------- Hero Section (Home) ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4xl) var(--space-xl) var(--space-2xl);
  text-align: center;
}

.hero-inner {
  max-width: 600px;
}

.hero-logo {
  margin-bottom: var(--space-2xl);
}

.hero-logo-img {
  max-width: 100%;
  height: auto;
}

.hero-tagline {
  font-family: var(--font-heading);
  font-size: 1.65rem;
  line-height: 1.6;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  font-weight: 400;
}

.hero-features {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.hero-feature {
  display: inline-block;
  padding: var(--space-xs) var(--space-lg);
  background: var(--color-primary-subtle);
  color: var(--color-primary-hover);
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 500;
}

.hero-feature-sep {
  color: var(--color-text-muted);
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.8rem;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

/* ---------- Home Categories Section ---------- */
.home-categories {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-xl);
}

.section-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  text-align: center;
  margin-bottom: var(--space-2xl);
  font-weight: 600;
  color: var(--color-text);
}

.category-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text);
  transition: all var(--transition);
}

.category-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: var(--color-text);
}

.category-card-icon {
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.category-card-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.category-card-count {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ---------- Docs Hub ---------- */
.docs-hub {
  min-height: calc(100vh - 56px);
  padding: calc(56px + var(--space-3xl)) var(--space-xl) var(--space-3xl);
  max-width: var(--max-width);
  margin: 0 auto;
}

.hub-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.hub-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.hub-desc {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.hub-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-2xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text);
  transition: all var(--transition);
}

.hub-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  color: var(--color-text);
}

.hub-card-top {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.hub-card-icon {
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.hub-card-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
}

.hub-card-count {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.hub-card-cta {
  margin-top: auto;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-primary);
}

/* ---------- Doc Listing (Category Index) ---------- */
.doc-listing {
  min-height: calc(100vh - 56px);
  padding: calc(56px + var(--space-3xl)) var(--space-xl) var(--space-3xl);
  max-width: var(--max-width);
  margin: 0 auto;
}

.listing-header {
  margin-bottom: var(--space-2xl);
}

.back-link {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.back-link:hover {
  color: var(--color-primary);
}

.listing-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.listing-count {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-md);
}

.doc-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-text);
  transition: all var(--transition);
}

.doc-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  color: var(--color-text);
}

.doc-card-head {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
}

.doc-card-num {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.8rem;
  height: 1.8rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-subtle);
  border-radius: var(--radius-sm);
  margin-top: 1px;
}

.doc-card-title {
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.5;
}

.doc-card-desc {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.doc-card-read {
  margin-top: auto;
  font-size: 0.8rem;
  color: var(--color-primary);
  font-weight: 500;
}

.doc-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
}

.doc-card-date {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* ---------- Article Page ---------- */
.article-page {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: calc(56px + var(--space-2xl)) var(--space-xl) var(--space-3xl);
}

.article-header {
  margin-bottom: var(--space-2xl);
}

.article-back {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.article-back:hover {
  color: var(--color-primary);
}

.article-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.4;
}

.article-meta {
  margin-top: var(--space-sm);
}

.article-meta time {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.article-body-wrap {
  display: flex;
  gap: var(--space-xl);
}

/* TOC */
.article-toc {
  display: none;
  position: sticky;
  top: calc(56px + var(--space-xl));
  width: 200px;
  flex-shrink: 0;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
}

.toc-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  font-weight: 600;
}

.toc-list {
  list-style: none;
  border-left: 1px solid var(--color-border);
}

.toc-item a {
  display: block;
  padding: var(--space-xs) 0 var(--space-xs) var(--space-md);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  border-left: 1px solid transparent;
  margin-left: -1px;
  transition: all var(--transition);
}

.toc-item a:hover {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
}

.toc-h3 a { padding-left: var(--space-lg); font-size: 0.78rem; }
.toc-h4 a { padding-left: var(--space-2xl); font-size: 0.75rem; }

/* Article Content - Markdown Body */
.markdown-body {
  flex: 1;
  min-width: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-text);
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  line-height: 1.4;
}

.markdown-body h1 { font-size: 1.6rem; border-bottom: 1px solid var(--color-border-light); padding-bottom: var(--space-sm); }
.markdown-body h2 { font-size: 1.3rem; }
.markdown-body h3 { font-size: 1.1rem; }
.markdown-body h4 { font-size: 1rem; }

.markdown-body p {
  margin-bottom: var(--space-md);
}

.markdown-body ul,
.markdown-body ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-xl);
}

.markdown-body li {
  margin-bottom: var(--space-xs);
}

.markdown-body strong {
  font-weight: 600;
}

.markdown-body blockquote {
  margin: var(--space-lg) 0;
  padding: var(--space-md) var(--space-lg);
  border-left: 3px solid var(--color-primary);
  background: var(--color-primary-light);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text-secondary);
}

.markdown-body hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-2xl) 0;
}

/* Code blocks */
.code-block-wrapper {
  position: relative;
  margin: var(--space-lg) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #1C1917;
}

.code-lang {
  position: absolute;
  top: 0;
  right: 0;
  padding: 0.25rem 0.75rem;
  font-size: 0.7rem;
  color: rgba(255,255,255,0.4);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.markdown-body pre {
  overflow-x: auto;
  padding: var(--space-lg);
  background: #1C1917;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

/* Nested pre inside code-block-wrapper — wrapper handles border/background */
.code-block-wrapper pre {
  border: none;
  border-radius: 0;
  margin: 0;
}

.markdown-body code {
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.markdown-body:not(pre) > code {
  background: var(--color-primary-subtle);
  color: var(--color-primary-hover);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
}

.markdown-body pre code {
  color: #E7E5E4;
  font-size: 0.82rem;
  line-height: 1.7;
}

/* Tables */
.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  font-size: 0.88rem;
}

.markdown-body th {
  background: var(--color-primary-subtle);
  font-weight: 600;
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
}

.markdown-body td {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
}

.markdown-body tr:nth-child(even) {
  background: var(--color-bg);
}

/* Images in markdown */
.markdown-body img {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  margin: var(--space-lg) 0;
}

/* Article pager */
.article-pager {
  display: flex;
  justify-content: space-between;
  gap: var(--space-md);
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.pager-link {
  flex: 1;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  transition: all var(--transition);
  color: var(--color-text);
}

.pager-link:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.pager-prev { text-align: left; }
.pager-next { text-align: right; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border-light);
  background: var(--color-surface);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-xl);
  text-align: center;
}

.footer-text {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-icp {
  margin-top: var(--space-xs);
  font-size: 0.75rem;
}

.footer-icp a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer-icp a:hover,
.footer-beian a:hover {
  color: var(--color-primary);
}

.footer-beian {
  margin-top: var(--space-xs);
  font-size: 0.75rem;
}

.footer-beian a {
  color: var(--color-text-muted);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.beian-icon {
  width: 14px;
  height: 14px;
  vertical-align: middle;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hub-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
  }

  .category-cards {
    grid-template-columns: repeat(3, 1fr);
  }

  .article-toc {
    display: none !important;
  }
}

@media (max-width: 768px) {
  .hero-tagline {
    font-size: 1.25rem;
  }

  .hero-features {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .hero-feature-sep {
    display: none;
  }

  .hub-grid {
    grid-template-columns: 1fr;
  }

  .category-cards {
    grid-template-columns: 1fr;
  }

  .doc-grid {
    grid-template-columns: 1fr;
  }

  .article-title {
    font-size: 1.5rem;
  }

  .article-pager {
    flex-direction: column;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    padding: var(--space-md);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }

  .site-nav.open {
    display: flex;
  }

  .mobile-nav-toggle {
    display: flex;
  }

  .header-inner {
    padding: 0 var(--space-md);
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 240px;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: var(--space-3xl) var(--space-md) var(--space-xl);
  }

  .hero-tagline {
    font-size: 1.1rem;
  }

  .listing-title {
    font-size: 1.4rem;
  }

  .article-page {
    padding: calc(56px + var(--space-lg)) var(--space-md) var(--space-2xl);
  }
}

/* ---------- Print ---------- */
@media print {
  .site-header, .site-footer, .article-toc, .article-pager, .article-back {
    display: none !important;
  }

  .article-page {
    padding: 0;
  }

  .markdown-body {
    font-size: 11pt;
  }
}