/* TC Tools Docs - 文档站样式 */
/* ===== 基础变量和重置 ===== */
:root {
  --bg: #ffffff;
  --bg-secondary: #f8fafc;
  --card-bg: #ffffff;
  --card-border: #e2e8f0;
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-bg: rgba(99,102,241,0.08);
  --accent: #10b981;
  --accent-bg: rgba(16,185,129,0.08);
  --border: #e2e8f0;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 16px rgba(0,0,0,0.08);
  --max-width: 1200px;
  --header-h: 60px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  min-height: 100vh;
}
a { color: var(--primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--primary-hover); }
img { max-width: 100%; height: auto; }

/* ===== Header ===== */
.docs-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex; align-items: center; gap: 8px;
  font-size: 1.15rem; font-weight: 700; color: var(--text);
}
.logo:hover { color: var(--text); }
.logo-icon { font-size: 1.4rem; }
.logo-text small { font-weight: 400; color: var(--text-secondary); font-size: 0.75rem; margin-left: 4px; }
.header-nav {
  display: flex; align-items: center; gap: 24px;
}
.header-nav a {
  color: var(--text-secondary); font-size: 0.9rem; font-weight: 500;
  transition: color .2s;
}
.header-nav a:hover { color: var(--text); }
.nav-cta {
  background: var(--primary) !important;
  color: #fff !important;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.82rem !important;
  transition: all .2s !important;
}
.nav-cta:hover { background: var(--primary-hover) !important; transform: translateY(-1px); }
.mobile-menu-btn {
  display: none;
  background: none; border: none; color: var(--text);
  font-size: 1.5rem; cursor: pointer; padding: 4px;
}

/* ===== Main ===== */
.docs-main { min-height: calc(100vh - var(--header-h) - 200px); }
.container-lg { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* ===== Hero ===== */
.hero {
  text-align: center;
  padding: 80px 20px 60px;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg) 100%);
}
.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 12px;
}
.hero-desc { color: var(--text-secondary); font-size: 1.1rem; margin-bottom: 24px; }
.hero-stats {
  display: flex; justify-content: center; align-items: center;
  gap: 12px; flex-wrap: wrap; margin-bottom: 32px;
}
.hero-stats.compact { gap: 6px 14px; margin-bottom: 28px; }
.hero-stats.compact .stat { font-size: 0.88rem; }
.stat { color: var(--text-secondary); font-size: 0.95rem; }
.stat strong { color: var(--text); font-weight: 700; }
.stat-sep { color: var(--text-muted); }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 24px; border-radius: 10px;
  font-size: 0.95rem; font-weight: 600;
  cursor: pointer; border: none; transition: all .2s;
  text-decoration: none;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); color: #fff; transform: translateY(-1px); }
.btn-secondary { background: var(--bg-secondary); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); }
.btn-lg { padding: 14px 32px; font-size: 1.05rem; border-radius: 12px; }
.btn-sm { padding: 6px 14px; font-size: 0.82rem; }

/* ===== Sections ===== */
.section { max-width: var(--max-width); margin: 0 auto; padding: 48px 20px; }
.section h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 4px; }
.section-desc { color: var(--text-secondary); margin-bottom: 24px; }
.section-more { text-align: center; margin-top: 20px; }
.section-more a { color: var(--primary); font-weight: 500; }
.more-sep { color: var(--text-muted); margin: 0 8px; }

/* ===== Content Grid (Guides + Blog merged) ===== */
.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

/* ===== Card Grid ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.card-grid-full { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }

.tool-card-link { text-decoration: none; color: inherit; display: block; }
.tool-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px;
  transition: all .25s;
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.tool-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99,102,241,0.15);
}
.tool-card-icon { font-size: 2rem; }
.tool-card-info { flex: 1; }
.tool-card-info h3 { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
.tool-card-info p { color: var(--text-secondary); font-size: 0.85rem; line-height: 1.5; }
.tool-card-footer {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 8px; border-top: 1px solid var(--border);
}
.tool-card-go { color: var(--primary); font-size: 0.85rem; font-weight: 500; }

/* ===== Badges & Tags ===== */
.badge {
  display: inline-block; padding: 2px 8px;
  border-radius: 10px; font-size: 0.72rem; font-weight: 500;
}
.badge-local { background: var(--accent-bg); color: var(--accent); }
.badge-proxy { background: var(--primary-bg); color: var(--primary); }
.tag {
  display: inline-block; padding: 2px 10px;
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: 12px; font-size: 0.75rem; color: var(--text-secondary);
}

/* ===== Category Grid ===== */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}
.cat-grid-large { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.cat-card {
  display: flex; flex-direction: column; align-items: center;
  gap: 8px; padding: 20px 16px;
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius); text-align: center;
  transition: all .2s; text-decoration: none; color: var(--text);
}
.cat-card:hover { border-color: var(--primary); transform: translateY(-2px); color: var(--text); }
.cat-card-icon { font-size: 2rem; }
.cat-card-name { font-weight: 600; font-size: 0.95rem; }
.cat-card-count { color: var(--text-secondary); font-size: 0.8rem; }
.cat-card-large { flex-direction: row; text-align: left; gap: 16px; padding: 24px; }
.cat-card-large h3 { font-size: 1.05rem; }
.cat-card-large p { color: var(--text-secondary); font-size: 0.85rem; }

/* ===== Role Grid ===== */
.role-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}
.role-grid-large { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.role-card {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 20px;
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius);
  transition: all .2s; text-decoration: none; color: var(--text);
}
.role-card:hover { border-color: var(--primary); transform: translateY(-2px); color: var(--text); }
.role-card-icon { font-size: 1.8rem; flex-shrink: 0; }
.role-card-info { flex: 1; }
.role-card-name { font-weight: 600; font-size: 0.95rem; display: block; }
.role-card-count { color: var(--text-secondary); font-size: 0.8rem; }
.role-card-large { padding: 24px; }
.role-card-large h3 { font-size: 1.05rem; margin-bottom: 2px; }
.role-card-large p { color: var(--text-secondary); font-size: 0.85rem; margin-bottom: 6px; }
.role-tags { display: flex; gap: 6px; flex-wrap: wrap; }

/* ===== Guide & Blog Cards ===== */
.guide-grid, .blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.guide-card, .blog-card {
  display: block; padding: 20px;
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius); transition: all .2s;
  text-decoration: none; color: var(--text);
}
.guide-card:hover, .blog-card:hover { border-color: var(--primary); transform: translateY(-2px); color: var(--text); }
.guide-card h3, .blog-card h3 { font-size: 1rem; margin-bottom: 6px; }
.guide-card p, .blog-card p { color: var(--text-secondary); font-size: 0.85rem; line-height: 1.5; }
.guide-card-more { color: var(--primary); font-size: 0.85rem; margin-top: 8px; display: inline-block; }
.blog-card-date { color: var(--text-muted); font-size: 0.8rem; margin-top: 8px; display: block; }
.guide-card-meta, .blog-card-meta {
  display: flex; gap: 12px; align-items: center; margin-top: 10px;
  color: var(--text-muted); font-size: 0.8rem;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: 16px 0; font-size: 0.85rem;
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb-sep { color: var(--text-muted); }
.breadcrumb-current { color: var(--text); font-weight: 500; }

/* ===== Tool Detail Page ===== */
.tool-layout {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 32px;
  padding: 0 0 48px;
}
.tool-header {
  display: flex; gap: 20px; align-items: flex-start;
  margin-bottom: 24px;
}
.tool-header-icon { font-size: 3rem; flex-shrink: 0; }
.tool-header-info h1 { font-size: 1.8rem; font-weight: 700; margin-bottom: 6px; }
.tool-desc { color: var(--text-secondary); font-size: 1rem; margin-bottom: 10px; }
.tool-meta { display: flex; gap: 10px; flex-wrap: wrap; }
.tool-cat-tag {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 12px; background: var(--primary-bg);
  color: var(--primary); border-radius: 12px; font-size: 0.82rem;
}
.tool-security-tag {
  display: inline-block; padding: 3px 12px;
  background: var(--accent-bg); color: var(--accent);
  border-radius: 12px; font-size: 0.82rem;
}
.tool-cta-bar {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  padding: 20px 0; margin-bottom: 24px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cta-hint { color: var(--text-muted); font-size: 0.82rem; }

/* ===== Content Sections ===== */
.content-section { margin-bottom: 32px; }
.content-section h2 {
  font-size: 1.3rem; font-weight: 700;
  margin-bottom: 16px; padding-bottom: 8px;
  border-bottom: 2px solid var(--primary);
  display: inline-block;
}
.feature-list { list-style: none; }
.feature-list li {
  padding: 10px 16px; margin-bottom: 8px;
  background: var(--bg-secondary); border-radius: var(--radius-sm);
  font-size: 0.92rem; line-height: 1.6;
  border-left: 3px solid var(--primary);
}
.howto-steps { list-style: none; counter-reset: step; }
.howto-steps li {
  padding: 14px 16px 14px 52px; margin-bottom: 10px;
  background: var(--bg-secondary); border-radius: var(--radius-sm);
  position: relative; font-size: 0.92rem; line-height: 1.6;
  counter-increment: step;
}
.howto-steps li::before {
  content: counter(step);
  position: absolute; left: 14px; top: 14px;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.82rem; font-weight: 700;
}

/* ===== Use Cases ===== */
.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 12px;
}
.use-case {
  padding: 20px; background: var(--bg-secondary);
  border-radius: var(--radius); text-align: center;
}
.use-case-icon { font-size: 2rem; display: block; margin-bottom: 8px; }
.use-case h4 { font-size: 0.95rem; margin-bottom: 6px; }
.use-case p { color: var(--text-secondary); font-size: 0.85rem; }

/* ===== 小贴士 ===== */
.tips-grid { display: flex; flex-direction: column; gap: 10px; }
.tip-item {
  padding: 14px 18px; background: var(--primary-bg);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius-sm); font-size: 0.9rem;
  color: var(--text-secondary); line-height: 1.6;
}
.tip-item:hover { background: rgba(99,102,241,0.15); color: var(--text); }

/* ===== FAQ ===== */
.faq-item {
  margin-bottom: 10px;
  background: var(--bg-secondary); border-radius: var(--radius-sm);
  overflow: hidden;
}
.faq-item summary {
  padding: 14px 16px; cursor: pointer;
  font-weight: 600; font-size: 0.92rem;
  list-style: none; display: flex; justify-content: space-between; align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; color: var(--primary); font-size: 1.2rem; font-weight: 700; }
.faq-item[open] summary::after { content: '−'; }
.faq-item p { padding: 0 16px 14px; color: var(--text-secondary); font-size: 0.88rem; line-height: 1.6; }

/* ===== Sidebar ===== */
.tool-sidebar { position: sticky; top: 80px; }
.toc {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 16px;
}
.toc h4 { font-size: 0.9rem; margin-bottom: 10px; }
.toc ul { list-style: none; }
.toc li { margin-bottom: 4px; }
.toc a { color: var(--text-secondary); font-size: 0.85rem; display: block; padding: 4px 0; }
.toc a:hover { color: var(--primary); }
.toc-h3 { padding-left: 16px; }
.sidebar-cta {
  margin-top: 16px; padding: 20px; text-align: center;
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius);
}
.sidebar-cta h4 { margin-bottom: 6px; }
.sidebar-cta p { color: var(--text-secondary); font-size: 0.85rem; margin-bottom: 12px; }

/* ===== Article Layout ===== */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 32px;
  padding: 0 0 48px;
}
.article-header { margin-bottom: 32px; }
.article-badge {
  display: inline-block; padding: 4px 14px;
  background: var(--primary-bg); color: var(--primary);
  border-radius: 12px; font-size: 0.82rem; font-weight: 500;
  margin-bottom: 12px;
}
.article-header h1 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.article-meta {
  display: flex; gap: 16px; flex-wrap: wrap;
  color: var(--text-muted); font-size: 0.85rem;
}
.article-body { line-height: 1.8; }
.article-body h2 { font-size: 1.4rem; margin: 32px 0 16px; }
.article-body h3 { font-size: 1.15rem; margin: 24px 0 12px; }
.article-body p { margin-bottom: 16px; color: var(--text-secondary); }
.article-body code {
  background: var(--bg-secondary); padding: 2px 6px;
  border-radius: 4px; font-size: 0.88rem; color: var(--primary);
}
.article-body pre {
  background: var(--bg-secondary); padding: 16px;
  border-radius: var(--radius-sm); overflow-x: auto;
  margin-bottom: 16px; font-size: 0.88rem;
}
.article-body pre code { background: none; padding: 0; }
.article-body ul, .article-body ol { margin-bottom: 16px; padding-left: 24px; }
.article-body li { margin-bottom: 6px; color: var(--text-secondary); }
.article-body blockquote {
  border-left: 3px solid var(--primary);
  padding: 12px 16px; margin-bottom: 16px;
  background: var(--bg-secondary); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.article-cta {
  margin-top: 40px; padding: 32px; text-align: center;
  background: linear-gradient(135deg, var(--primary-bg), var(--accent-bg));
  border: 1px solid var(--border); border-radius: var(--radius);
}
.article-cta h3 { margin-bottom: 8px; }
.article-cta p { color: var(--text-secondary); margin-bottom: 16px; }
.article-sidebar { position: sticky; top: 80px; }

/* ===== Page Header (Category/Role) ===== */
.page-header {
  display: flex; gap: 20px; align-items: center;
  padding: 32px 0; margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.page-icon { font-size: 3rem; flex-shrink: 0; }
.page-header h1 { font-size: 1.8rem; font-weight: 700; margin-bottom: 4px; }
.page-header p { color: var(--text-secondary); }

/* ===== Related & CTA Bottom ===== */
.related-section { padding: 40px 0; }
.related-section h2 { font-size: 1.3rem; margin-bottom: 20px; }
.cta-bottom {
  text-align: center; padding: 48px 20px;
  background: var(--bg-secondary); border-radius: var(--radius);
  margin: 32px 0;
}
.cta-bottom h3 { font-size: 1.3rem; margin-bottom: 8px; }
.cta-bottom p { color: var(--text-secondary); margin-bottom: 20px; }

/* ===== Search ===== */
.search-wrap {
  position: relative; max-width: 500px; margin: 0 auto 32px;
  padding: 0 20px;
}
.search-input {
  width: 100%; padding: 12px 16px 12px 40px;
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text);
  font-size: 0.95rem; outline: none; transition: border-color .2s;
}
.search-input:focus { border-color: var(--primary); }
.search-icon {
  position: absolute; left: 34px; top: 50%;
  transform: translateY(-50%); color: var(--text-muted); font-size: 0.9rem;
}
.search-results {
  position: absolute; top: 100%; left: 20px; right: 20px;
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius); margin-top: 4px;
  max-height: 400px; overflow-y: auto;
  display: none; z-index: 50; box-shadow: var(--shadow);
}
.search-result-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; border-bottom: 1px solid var(--border);
  text-decoration: none; color: var(--text);
}
.search-result-item:hover { background: var(--bg-secondary); }
.search-result-item:last-child { border-bottom: none; }
.search-icon-char { font-size: 1.5rem; flex-shrink: 0; }
.search-result-item strong { display: block; font-size: 0.92rem; }
.search-result-item p { color: var(--text-secondary); font-size: 0.8rem; margin: 0; }
.search-empty { padding: 20px; text-align: center; color: var(--text-muted); }

/* ===== Footer ===== */
.docs-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
}
.footer-inner { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 32px;
  margin-bottom: 32px;
}
.footer-col h4 { font-size: 0.95rem; margin-bottom: 12px; }
.footer-col p { color: var(--text-secondary); font-size: 0.85rem; line-height: 1.6; }
.footer-col a {
  display: block; color: var(--text-secondary);
  font-size: 0.85rem; padding: 3px 0; transition: color .2s;
}
.footer-col a:hover { color: var(--primary); }
.footer-bottom {
  padding-top: 24px; border-top: 1px solid var(--border);
  text-align: center; color: var(--text-muted); font-size: 0.82rem;
}

/* ===== Home Page Brand ===== */
.hero-brand {
  padding: 60px 20px 50px;
}
.hero-brand-inner {
  max-width: 800px;
  margin: 0 auto;
}
.hero-brand-badge {
  display: inline-block;
  padding: 4px 14px;
  background: var(--primary-bg);
  color: var(--primary);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.hero-desc strong {
  color: var(--primary);
}



/* ===== Responsive ===== */
@media (max-width: 900px) {
  .tool-layout, .article-layout { grid-template-columns: 1fr; }
  .tool-sidebar, .article-sidebar { display: none; }
}
@media (max-width: 768px) {
  .hero h1 { font-size: 1.8rem; }
  .hero-desc { font-size: 0.95rem; }
  .mobile-menu-btn { display: block; }
  .header-nav {
    display: none; position: absolute;
    top: var(--header-h); left: 0; right: 0;
    background: var(--bg-secondary); border-bottom: 1px solid var(--border);
    flex-direction: column; padding: 16px 20px; gap: 12px;
  }
  .header-nav.open { display: flex; }
  .card-grid { grid-template-columns: 1fr; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .role-grid { grid-template-columns: 1fr; }
  .page-header { flex-direction: column; text-align: center; }
  .tool-header { flex-direction: column; }
  .use-cases-grid { grid-template-columns: 1fr; }

}