/* Playbook 中文长文排版 */
:root {
  --pb-text: #1f2937;
  --pb-muted: #6b7280;
  --pb-border: #e5e7eb;
  --pb-accent: #2563eb;
  --pb-accent-soft: #eff6ff;
  --pb-success: #059669;
  --pb-max: 760px;
}

body.playbook-page {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--pb-text);
  background: #f9fafb;
  line-height: 1.7;
}

.playbook-nav {
  background: #fff;
  border-bottom: 1px solid var(--pb-border);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.playbook-nav .navbar-brand {
  color: var(--pb-accent) !important;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.playbook-shell {
  max-width: var(--pb-max);
  margin: 0 auto;
}

.playbook-card {
  background: #fff;
  border: 1px solid var(--pb-border);
  border-radius: 12px;
  padding: 1.75rem 1.5rem 2rem;
  box-shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
}

@media (min-width: 768px) {
  .playbook-card {
    padding: 2.25rem 2.5rem 2.5rem;
  }
}

.playbook-meta {
  color: var(--pb-muted);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

.playbook-title {
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 1.25rem;
  color: #111827;
}

@media (min-width: 768px) {
  .playbook-title {
    font-size: 1.85rem;
  }
}

.playbook-lead {
  font-size: 1.05rem;
  line-height: 1.65;
  color: #111827;
  background: var(--pb-accent-soft);
  border-left: 4px solid var(--pb-accent);
  border-radius: 0 8px 8px 0;
  padding: 1rem 1.15rem;
  margin-bottom: 1rem;
}

.playbook-lead strong {
  color: var(--pb-accent);
  font-weight: 600;
}

.playbook-hook {
  color: #374151;
  font-size: 1rem;
  margin-bottom: 1.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--pb-border);
}

.article-body {
  font-size: 1.02rem;
}

.article-body > :first-child {
  margin-top: 0 !important;
}

.article-body h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #111827;
  margin-top: 2rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.35rem;
  border-bottom: 2px solid var(--pb-accent-soft);
}

.article-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-top: 1.25rem;
  margin-bottom: 0.65rem;
}

.article-body p {
  margin-bottom: 1rem;
  line-height: 1.8;
  color: #374151;
}

.article-body ul,
.article-body ol {
  margin-bottom: 1.1rem;
  padding-left: 1.35rem;
}

.article-body li {
  margin-bottom: 0.45rem;
  line-height: 1.7;
}

.article-body .ai-callout {
  border: 1px solid #bbf7d0;
  border-left: 4px solid var(--pb-success);
  background: #f0fdf4;
  border-radius: 8px;
  padding: 1rem 1.15rem;
  margin: 0 0 1.5rem;
  font-size: 0.98rem;
  line-height: 1.65;
  color: #14532d;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.92rem;
}

.article-body th,
.article-body td {
  border: 1px solid var(--pb-border);
  padding: 0.55rem 0.65rem;
  text-align: left;
}

.article-body th {
  background: #f3f4f6;
  font-weight: 600;
}

.article-body blockquote {
  border-left: 4px solid #9ca3af;
  padding: 0.5rem 0 0.5rem 1rem;
  margin: 1.25rem 0;
  color: #4b5563;
  background: #f9fafb;
  border-radius: 0 6px 6px 0;
}

.article-body blockquote p {
  margin-bottom: 0;
}

.article-body hr {
  margin: 2rem 0;
  border: none;
  border-top: 1px solid var(--pb-border);
}

.article-body a {
  color: var(--pb-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.playbook-faq {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--pb-border);
}

.playbook-faq h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.playbook-faq-item {
  margin-bottom: 1.1rem;
}

.playbook-faq-item .q {
  font-weight: 600;
  color: #111827;
  margin-bottom: 0.35rem;
}

.playbook-faq-item .a {
  color: var(--pb-muted);
  margin: 0;
}

.playbook-related {
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px dashed var(--pb-border);
}

.playbook-related h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--pb-muted);
  margin-bottom: 0.75rem;
}

.playbook-related ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.playbook-related li {
  margin-bottom: 0.5rem;
}

.playbook-related a {
  color: var(--pb-accent);
  text-decoration: none;
}

.playbook-related a:hover {
  text-decoration: underline;
}

.playbook-breadcrumb {
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.playbook-breadcrumb a {
  color: var(--pb-muted);
  text-decoration: none;
}

.playbook-breadcrumb a:hover {
  color: var(--pb-accent);
}

.playbook-hub .category-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--pb-accent);
  margin: 1.5rem 0 0.75rem;
}

.playbook-hub .guide-link {
  display: block;
  font-weight: 600;
  color: #111827;
  text-decoration: none;
  margin-bottom: 0.25rem;
}

.playbook-hub .guide-link:hover {
  color: var(--pb-accent);
}

.playbook-hub .guide-preview {
  font-size: 0.9rem;
  color: var(--pb-muted);
  margin: 0 0 0.85rem;
}