@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400;1,500&family=Noto+Sans+SC:wght@300;400;500&display=swap');

:root {
  --bg: #f4efe6;
  --paper: #fbf8f2;
  --paper-strong: #e7ded0;
  --ink: #121212;
  --ink-soft: #5f564d;
  --ink-muted: #7b6e61;
  --line: rgba(24, 20, 16, 0.14);
  --sand: #d9cfbf;
  --cream: #f4efe6;
  --accent-soft: #d8c1a3;
  --shadow: 0 20px 50px rgba(18, 18, 18, 0.06);
  --shadow-hover: 0 28px 60px rgba(18, 18, 18, 0.12);
  --serif: "Cormorant Garamond", "STSong", "Times New Roman", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  /* 品牌色 */
  --laoqian-yellow: #F5C200;
  --laoqian-yellow-bg: #FFFAE8;
  --laoqian-yellow-dark: #9A7800;
  --mianji-red: #C8243C;
  --mianji-green: #1A7A1A;
  --mianji-green-accent: #3DAA3D;
}
*,
*::before,
*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 300;
  background:
    radial-gradient(circle at top left, rgba(214, 196, 168, 0.32), transparent 22%),
    linear-gradient(180deg, #f8f4ed 0%, var(--bg) 100%);
}
a {
  color: inherit;
  text-decoration: none;
}
a:hover { opacity: 0.76; }
.shell { max-width: 1360px; margin: 0 auto; padding: 28px; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
.site-header, .site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.site-header {
  margin-bottom: 28px;
  padding: 18px 24px;
  background: rgba(251, 248, 242, 0.72);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}
.site-footer {
  margin-top: 32px;
  padding: 16px 2px;
  color: var(--ink-muted);
  font-size: 14px;
}
.brand-area {
  display: flex;
  align-items: center;
  gap: 14px;
}
.brand-logos {
  display: flex;
  gap: 6px;
  align-items: center;
}
.brand-logo {
  width: 38px;
  height: 38px;
  object-fit: cover;
  border-radius: 5px;
  flex-shrink: 0;
}
.brand {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 28px;
  letter-spacing: 0.01em;
  color: var(--ink);
  animation: fadeIn 0.6s ease both;
}
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  color: var(--ink-muted);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.nav a {
  position: relative;
  transition: color 0.18s;
}
.nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 1px;
  background: var(--ink);
  transition: width 0.2s ease;
}
.nav a:hover { opacity: 1; color: var(--ink); }
.nav a:hover::after { width: 100%; }
.eyebrow {
  margin: 0 0 8px;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 12px;
  font-weight: 600;
}
.panel,
.source-column,
.source-preview,
.api-hero-panel,
.api-code-panel,
.archive-card,
.archive-panel {
  background: rgba(251, 248, 242, 0.82);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.panel { padding: 24px; margin-bottom: 20px; }
.lead {
  max-width: 760px;
  font-size: 18px;
  line-height: 1.75;
  color: #d5cabc;
  animation: fadeUp 0.7s ease 0.25s both;
}
.hero-metrics {
  animation: fadeUp 0.7s ease 0.4s both;
}
.editorial-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(320px, 0.9fr);
  gap: 0;
  background: var(--ink);
  color: var(--cream);
  padding: 0;
  margin-bottom: 24px;
  overflow: hidden;
  position: relative;
}
.editorial-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 1;
}
.editorial-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--laoqian-yellow) 50%, var(--mianji-red) 50%);
  z-index: 3;
}
.hero-copy, .hero-side { position: relative; z-index: 2; }
.hero-copy,
.hero-side {
  min-width: 0;
}
.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 48px 36px 48px 40px;
}
.hero-copy h1,
.hero-side h2,
.overview-strip h2,
.sources-intro h1,
.api-hero-panel h1,
.source-preview h2,
.source-column h2,
.card h2,
.document-content h1,
.document-content h2,
.prose h1,
.prose h2 {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.02em;
}
.hero-copy h1 {
  margin: 0;
  font-size: clamp(44px, 5.4vw, 86px);
  line-height: 0.92;
  animation: fadeUp 0.7s ease 0.1s both;
}
.hero-side {
  background: var(--paper-strong);
  color: var(--ink);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  border-left: 1px solid rgba(255,255,255,0.06);
}
.hero-side h2 {
  margin: 0;
  font-size: clamp(30px, 3.3vw, 48px);
  line-height: 0.98;
}
.hero-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}
.metric-card {
  min-width: 138px;
  padding: 14px;
  background: var(--paper);
  color: var(--ink);
}
.metric-card strong {
  display: block;
  font-family: var(--serif);
  font-style: italic;
  font-size: 42px;
  line-height: 1;
}
.metric-card span {
  color: var(--ink-soft);
  font-size: 13px;
}
.citation-block {
  background: var(--ink);
  color: var(--cream);
  padding: 18px;
}
.citation-block p:last-child {
  margin: 0;
  font-family: var(--serif);
  font-style: italic;
  font-size: 28px;
  line-height: 1.12;
}
.overview-strip,
.sources-topbar,
.api-topbar,
.bottom-strip {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 18px;
  padding: 20px 24px;
  margin-bottom: 20px;
}
.overview-strip,
.sources-intro,
.api-hero-panel,
.archive-panel,
.source-preview,
.source-column {
  background: var(--paper);
}
.overview-strip h2,
.sources-intro h1,
.api-hero-panel h1 {
  margin: 0;
}
.overview-strip p,
.sources-topbar span,
.api-topbar span,
.bottom-strip p {
  margin: 0;
  color: var(--ink-muted);
}
.source-preview-grid,
.sources-grid,
.api-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-bottom: 20px;
}
.source-preview,
.source-column {
  padding: 24px;
}
.sources-topbar,
.api-topbar,
.endpoint-feature-dark {
  background: var(--ink);
  color: var(--cream);
}
.source-preview h2,
.source-column h2 {
  margin: 0;
  font-size: 34px;
}
.source-intro {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-soft);
}
.source-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}
.source-list li {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.source-list a {
  min-width: 0;
  font-size: 15px;
  line-height: 1.45;
  position: relative;
}
.source-list a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width 0.2s ease;
}
.source-list a:hover::after { width: 100%; }
.source-list a:hover { opacity: 1; }
.source-list span {
  flex: 0 0 auto;
  color: var(--ink-muted);
  font-size: 13px;
}
.source-cta {
  margin-top: 16px;
  font-size: 14px;
  color: var(--ink-muted);
}
.toolbar {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 12px;
  margin-bottom: 14px;
}
.toolbar input, .toolbar select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: white;
  font: inherit;
}
.list-note {
  margin-bottom: 14px;
  color: var(--ink-muted);
  font-size: 14px;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}
.card {
  padding: 20px;
  transition: box-shadow 0.22s ease, transform 0.22s ease;
}
.card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.card h2 {
  margin: 12px 0;
  font-size: 28px;
  line-height: 1.1;
}
.meta, .card-actions {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.meta, .card p, .notice { color: var(--ink-muted); }
.card p { line-height: 1.75; }
.card-actions {
  margin-top: 14px;
  font-size: 14px;
  color: var(--ink-muted);
}
.narrow { max-width: 900px; margin: 0 auto; }
.prose p, .prose li, .document-content p, .document-content li, .document-content blockquote {
  line-height: 2.0;
  font-size: 17px;
}
.document-content p + p {
  margin-top: 0.4em;
}
.document-page {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 20px;
}
.sticky { position: sticky; top: 18px; }
.stack-links { display: grid; gap: 10px; margin: 16px 0; }
.notice {
  border-top: 1px solid var(--line); padding-top: 16px; margin-top: 16px;
}
.document-content {
  background: var(--paper);
}
.document-content h1 {
  font-size: 46px;
  line-height: 1.02;
}
.document-content h2 {
  font-size: 32px;
  line-height: 1.08;
}
.document-content img { max-width: 100%; }
.document-content pre {
  overflow: auto;
  background: #1b1611;
  color: #fdf6e3;
  padding: 16px;
}
.code-block {
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  background: #1b1611;
  color: #fdf6e3;
  padding: 18px;
  margin: 0;
}
.document-content blockquote {
  margin: 0; padding-left: 16px; border-left: 4px solid var(--accent-soft);
}
.api-hero { margin-bottom: 20px; }
.api-topbar strong,
.sources-topbar strong {
  font-family: var(--serif);
  font-style: italic;
  font-size: 34px;
  font-weight: 400;
}
.api-hero-panel {
  padding: 26px;
}
.api-hero-panel h1 {
  font-size: clamp(38px, 5vw, 64px);
  line-height: 0.98;
}
.api-hero-panel p:last-child {
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 18px;
}
.endpoint-feature {
  padding: 22px;
}
.endpoint-feature h2 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 30px;
  line-height: 1.1;
}
.endpoint-feature-light {
  background: var(--paper-strong);
  color: var(--ink);
}
.endpoint-feature-dark {
  color: var(--cream);
}
.api-grid-secondary .panel {
  margin-bottom: 0;
}
.endpoint-card h2 {
  margin-top: 0;
  font-size: 26px;
  line-height: 1.2;
}
.endpoint-card p {
  margin-bottom: 0;
}
.api-usage h1 {
  margin-bottom: 10px;
}
.api-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}
.api-links a {
  display: inline-block;
  padding: 10px 14px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.62);
}
.api-code-panel {
  background: #1a1a1a;
  color: var(--cream);
  padding: 24px;
  margin-bottom: 20px;
}
.sources-page {
  display: flex;
  flex-direction: column;
}
.sources-intro {
  padding: 24px 0 8px;
  margin-bottom: 20px;
}
.sources-intro h1 {
  font-size: clamp(38px, 4.8vw, 68px);
  line-height: 0.98;
}
.source-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 12px;
  margin-bottom: 16px;
}
.source-head strong {
  font-size: 14px;
  color: var(--ink-muted);
}
.sources-topbar span,
.api-topbar span,
.endpoint-feature-dark .eyebrow {
  color: #cdbfae;
}
.bottom-strip {
  background: var(--sand);
}
.bottom-strip strong {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 28px;
}
code {
  font-family: "SFMono-Regular", "Menlo", monospace;
  font-size: 0.94em;
}
.tl-dr {
  background: rgba(251, 248, 242, 0.12);
  border-left: 3px solid rgba(216, 193, 163, 0.6);
  padding: 16px 20px;
  font-size: 0.9em;
  line-height: 1.8;
  color: #c8bfb0;
}
.tl-dr strong {
  color: var(--cream);
  letter-spacing: 0.04em;
  font-weight: 500;
}
.entity-block {
  margin-bottom: 16px;
}
.entity-block h2 {
  font-size: 1em;
  font-family: var(--serif);
  margin: 0 0 4px 0;
}
.entity-block p {
  margin: 0;
  font-size: 0.9em;
  color: var(--ink-soft);
  line-height: 1.6;
}
.faq-section {
  margin-top: 24px;
}
.faq-section h2 {
  margin-top: 0;
  margin-bottom: 20px;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.5em;
}
.faq-list {
  margin: 0;
}
.faq-list dt {
  font-weight: 600;
  margin-bottom: 6px;
  margin-top: 20px;
  color: var(--ink);
}
.faq-list dt:first-child {
  margin-top: 0;
}
.faq-list dd {
  margin: 0 0 4px 0;
  color: var(--ink-soft);
  line-height: 1.7;
  font-size: 0.95em;
}

/* ── 品牌色：老钱日日谈（黄）── */
.source-preview-laoqian,
.source-column-laoqian {
  background: var(--laoqian-yellow);
  color: var(--ink);
}
.source-preview-laoqian .source-head strong,
.source-column-laoqian .source-head strong {
  color: var(--laoqian-yellow-dark);
}
.source-preview-laoqian .eyebrow,
.source-column-laoqian .eyebrow {
  color: var(--laoqian-yellow-dark);
}
.source-preview-laoqian .source-intro,
.source-column-laoqian .source-intro {
  color: #3A2E00;
}
.source-preview-laoqian .source-list li,
.source-column-laoqian .source-list li {
  border-color: rgba(0, 0, 0, 0.14);
}
.source-preview-laoqian .source-list span,
.source-column-laoqian .source-list span {
  color: var(--laoqian-yellow-dark);
}
.source-preview-laoqian .source-cta,
.source-column-laoqian .source-cta {
  color: var(--laoqian-yellow-dark);
}
.entity-laoqian {
  border-left: 3px solid var(--laoqian-yellow);
  padding-left: 12px;
}
.doc-source-laoqian .doc-sidebar .panel {
  border-top: 4px solid var(--laoqian-yellow);
}
.archive-card[data-source="laoqian"] {
  border-left: 4px solid var(--laoqian-yellow);
}

/* ── 品牌色：播客《面基》（红 + 绿）── */
.source-preview-mianji,
.source-column-mianji {
  background: var(--mianji-red);
  color: #fff;
  border-bottom: 5px solid var(--mianji-green);
}
.source-preview-mianji .eyebrow,
.source-column-mianji .eyebrow {
  color: var(--mianji-green-accent);
}
.source-preview-mianji .source-head strong,
.source-column-mianji .source-head strong {
  color: var(--mianji-green-accent);
}
.source-preview-mianji .source-intro,
.source-column-mianji .source-intro {
  color: rgba(255, 255, 255, 0.78);
}
.source-preview-mianji .source-list span,
.source-column-mianji .source-list span {
  color: rgba(255, 255, 255, 0.6);
}
.source-preview-mianji .source-list li,
.source-column-mianji .source-list li {
  border-color: rgba(255, 255, 255, 0.18);
}
.source-preview-mianji .source-cta,
.source-column-mianji .source-cta {
  color: rgba(255, 255, 255, 0.65);
}
.source-preview-mianji .source-list a,
.source-column-mianji .source-list a {
  color: rgba(255, 255, 255, 0.92);
}
.entity-mianji {
  border-left: 3px solid var(--mianji-red);
  padding-left: 12px;
}
.doc-source-mianji .doc-sidebar .panel {
  border-top: 4px solid var(--mianji-red);
}
.archive-card[data-source="mianji"] {
  border-left: 4px solid var(--mianji-red);
}

@media (max-width: 900px) {
  .shell { padding: 18px; }
  .site-header, .site-footer, .overview-strip, .sources-topbar, .api-topbar, .bottom-strip {
    flex-direction: column;
    align-items: start;
  }
  .editorial-hero,
  .document-page,
  .toolbar,
  .source-preview-grid,
  .sources-grid,
  .api-grid {
    grid-template-columns: 1fr;
  }
  .hero-copy h1,
  .hero-side h2,
  .sources-intro h1,
  .api-hero-panel h1 {
    font-size: clamp(34px, 10vw, 52px);
  }
  .card-grid {
    grid-template-columns: 1fr;
  }
  .source-list li {
    flex-direction: column;
    align-items: start;
  }
}