/* ==========================================================================
   赔钱机场 (PEIQIAN / NETWORK) - RIBBON COMMERCE NETWORK THEME
   Style Sheet: Pure CSS, Precision Typography, Horizontal Band System
   ========================================================================== */

:root {
  --bg-main: #FFFFFF;
  --bg-secondary: #F7F8F5;
  --bg-tertiary: #F4F5F2;
  --bg-light: #FAFAF8;
  --bg-footer: #F1F2EE;
  --bg-blue-tint: #EEF2FF;
  --bg-orange-tint: #FFF1EB;

  --text-main: #121212;
  --text-body: #454A47;
  --text-muted: #777D79;

  --brand-blue: #2855FF;
  --brand-blue-hover: #1b42d8;
  --signal-orange: #FF6433;
  --border-color: #E1E4DF;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --container-max: 1200px;
  --radius-btn: 6px;
  --radius-badge: 4px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-body);
  line-height: 1.65;
  font-weight: 400;
  overflow-x: hidden;
}

/* Accessibility & Focus */
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease, border-color 0.15s ease;
}

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--brand-blue);
  outline-offset: 2px;
}

img, picture, svg {
  display: block;
  max-width: 100%;
}

/* Standard Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

p {
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

/* Containers & Ribbon Layouts */
.ribbon-wrap {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.ribbon-section {
  width: 100%;
  border-bottom: 1px solid var(--border-color);
  padding: 64px 0;
}

.ribbon-section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
}

.ribbon-section-header .section-tag {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--brand-blue);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ribbon-section-header h2 {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--text-main);
}

.ribbon-section-header .section-desc {
  font-size: 0.9375rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Header (Ribbon Top Bar)
   ========================================================================== */
.ribbon-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 68px;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--border-color);
}

.ribbon-header .ribbon-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-group {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--brand-blue);
  letter-spacing: 0.05em;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.header-nav a {
  font-size: 0.9375rem;
  color: var(--text-body);
  font-weight: 500;
  position: relative;
  padding: 8px 0;
}

.header-nav a:hover,
.header-nav a.active {
  color: var(--brand-blue);
}

.header-nav a.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--brand-blue);
}

.header-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-body);
  padding: 6px 12px;
}

.btn-link:hover {
  color: var(--brand-blue);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--brand-blue);
  color: #FFFFFF;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 9px 18px;
  border-radius: var(--radius-btn);
  transition: background-color 0.15s ease, transform 0.1s ease;
  border: 1px solid var(--brand-blue);
}

.btn-primary:hover {
  background-color: var(--brand-blue-hover);
  border-color: var(--brand-blue-hover);
  color: #FFFFFF;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: transparent;
  color: var(--text-main);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 9px 18px;
  border-radius: var(--radius-btn);
  border: 1px solid var(--border-color);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.btn-secondary:hover {
  border-color: var(--text-main);
  background-color: var(--bg-light);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-btn);
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
}

.mobile-nav-panel {
  display: none;
}

/* ==========================================================================
   Ribbon Hero (Full Width Ribbon Hero, Strictly No Left-Right Split)
   ========================================================================== */
.hero-ribbon-section {
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--border-color);
  padding: 48px 0 0 0;
}

.hero-meta-ribbon {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.hero-meta-ribbon .badge {
  color: var(--brand-blue);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.hero-meta-tags {
  display: flex;
  gap: 20px;
}

.hero-meta-tags span {
  letter-spacing: 0.06em;
}

.hero-title-ribbon {
  padding: 36px 0 24px 0;
  max-width: 1000px;
}

.hero-pretitle {
  display: block;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--signal-orange);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.hero-title-ribbon h1 {
  font-size: 3rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
}

.hero-desc-ribbon {
  max-width: 950px;
  font-size: 1.125rem;
  color: var(--text-body);
  line-height: 1.75;
  margin-bottom: 32px;
}

.hero-cta-ribbon {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 20px 0 36px 0;
  border-bottom: 1px solid var(--border-color);
}

.hero-info-ribbon {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid transparent;
  background-color: #FFFFFF;
}

.info-ribbon-block {
  padding: 24px 20px;
  border-right: 1px solid var(--border-color);
}

.info-ribbon-block:last-child {
  border-right: none;
}

.info-ribbon-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--brand-blue);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.info-ribbon-val {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-main);
  line-height: 1.5;
}

/* ==========================================================================
   01 / CAPABILITIES (Horizontal Bands)
   ========================================================================== */
.capabilities-section {
  background-color: var(--bg-secondary);
}

.capability-bands-wrap {
  display: flex;
  flex-direction: column;
}

.capability-band {
  display: grid;
  grid-template-columns: 80px 220px 1fr 40px;
  align-items: center;
  min-height: 120px;
  padding: 20px 24px;
  background-color: #FFFFFF;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  margin-top: -1px;
  transition: background-color 0.15s ease;
}

.capability-band:hover {
  background-color: var(--bg-light);
}

.cap-index {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--brand-blue);
}

.cap-heading h3 {
  font-size: 1.1875rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 4px;
}

.cap-heading span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.cap-content {
  font-size: 1rem;
  color: var(--text-body);
  padding: 0 16px;
}

.cap-arrow {
  color: var(--signal-orange);
  font-size: 1.25rem;
  font-weight: 700;
  transition: transform 0.15s ease;
  text-align: right;
}

.capability-band:hover .cap-arrow {
  transform: translateX(4px);
}

/* ==========================================================================
   02 / GLOBAL REGIONS (Region Ribbons)
   ========================================================================== */
.regions-section {
  background-color: #FFFFFF;
}

.region-ribbons-stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.region-ribbon {
  display: grid;
  grid-template-columns: 180px 1fr 60px;
  align-items: center;
  padding: 24px 28px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-light);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.region-ribbon.asia-major {
  padding: 32px 28px;
  background-color: #FFFFFF;
  border-left: 4px solid var(--brand-blue);
}

.region-label-group h3 {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.region-label-group span {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.region-nodes-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  list-style: none;
}

.region-nodes-list li {
  font-size: 0.9375rem;
  font-weight: 500;
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 4px 12px;
  border-radius: var(--radius-badge);
  color: var(--text-body);
}

.region-ribbon.asia-major .region-nodes-list li {
  background-color: var(--bg-secondary);
}

.region-count {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-muted);
  text-align: right;
}

.region-ribbon.asia-major .region-count {
  color: var(--brand-blue);
}

/* ==========================================================================
   03 / DEVICES (Device Ribbon Strip)
   ========================================================================== */
.devices-section {
  background-color: var(--bg-secondary);
}

.device-ribbon-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border-color);
  background-color: #FFFFFF;
}

.device-strip-col {
  padding: 32px 24px;
  border-right: 1px solid var(--border-color);
}

.device-strip-col:last-child {
  border-right: none;
}

.device-col-type {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--brand-blue);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.device-strip-col h3 {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.device-col-desc {
  font-size: 0.875rem;
  color: var(--text-body);
  line-height: 1.6;
  margin-bottom: 12px;
}

.device-col-link {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--brand-blue);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.device-col-link:hover {
  text-decoration: underline;
}

/* ==========================================================================
   04 / AI + MEDIA (Dual Ribbon Stack)
   ========================================================================== */
.ai-media-section {
  background-color: #FFFFFF;
}

.dual-ribbon-stack {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.ai-ribbon-block {
  background-color: var(--bg-blue-tint);
  border: 1px solid #D6DEFF;
  padding: 36px 32px;
  display: grid;
  grid-template-columns: 220px 80px 1fr;
  align-items: center;
  gap: 24px;
}

.media-ribbon-block {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: 36px 32px;
  display: grid;
  grid-template-columns: 220px 80px 1fr;
  align-items: center;
  gap: 24px;
}

.stack-ribbon-title h3 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 4px;
}

.stack-ribbon-title p {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.stack-ribbon-number {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--brand-blue);
}

.media-ribbon-block .stack-ribbon-number {
  color: var(--text-main);
}

.stack-ribbon-items {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  list-style: none;
}

.stack-ribbon-items li {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-badge);
  color: var(--text-main);
}

/* ==========================================================================
   05 / PLANS (Pricing Matrix)
   ========================================================================== */
.pricing-section {
  background-color: #FFFFFF;
}

.pricing-matrix-wrap {
  border: 1px solid var(--border-color);
  background-color: #FFFFFF;
}

.matrix-header-row {
  display: grid;
  grid-template-columns: 1.5fr 1.2fr 2.5fr 1.5fr 1.3fr;
  align-items: center;
  padding: 16px 24px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.matrix-plan-row {
  display: grid;
  grid-template-columns: 1.5fr 1.2fr 2.5fr 1.5fr 1.3fr;
  align-items: center;
  padding: 24px;
  border-bottom: 1px solid var(--border-color);
  position: relative;
  transition: background-color 0.15s ease;
}

.matrix-plan-row:last-child {
  border-bottom: none;
}

.matrix-plan-row:hover {
  background-color: var(--bg-light);
}

.matrix-plan-row.recommended {
  border-left: 4px solid var(--signal-orange);
  background-color: #FCFDFD;
}

.plan-name-cell h3 {
  font-size: 1.25rem;
  font-weight: 700;
  display: inline-block;
  margin-right: 8px;
}

.plan-name-cell .plan-zh {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.plan-name-cell .rec-badge {
  display: inline-block;
  background-color: var(--bg-orange-tint);
  color: var(--signal-orange);
  border: 1px solid var(--signal-orange);
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: var(--radius-badge);
  margin-left: 6px;
  vertical-align: middle;
}

.plan-data-cell {
  font-family: var(--font-mono);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-main);
}

.plan-desc-cell {
  font-size: 0.9375rem;
  color: var(--text-body);
  line-height: 1.5;
}

.plan-price-cell {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
}

.plan-price-cell span {
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--text-muted);
}

.plan-action-cell {
  text-align: right;
}

.plan-action-cell .btn-primary,
.plan-action-cell .btn-secondary {
  padding: 8px 14px;
  font-size: 0.8125rem;
}

/* ==========================================================================
   06 / GUIDES (Editorial Ribbon Feed)
   ========================================================================== */
.editorial-section {
  background-color: var(--bg-secondary);
}

.editorial-feed-stack {
  display: flex;
  flex-direction: column;
}

.guide-ribbon {
  display: grid;
  grid-template-columns: 60px 1fr 140px;
  align-items: center;
  padding: 22px 24px;
  background-color: #FFFFFF;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  margin-top: -1px;
  transition: background-color 0.15s ease;
}

.guide-ribbon:hover {
  background-color: var(--bg-light);
}

.guide-ribbon.featured {
  padding: 30px 24px;
  background-color: #FFFFFF;
  border-left: 4px solid var(--brand-blue);
}

.guide-ribbon-idx {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-muted);
}

.guide-ribbon.featured .guide-ribbon-idx {
  color: var(--brand-blue);
}

.guide-ribbon-main {
  padding-right: 24px;
}

.guide-ribbon-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.guide-cat-tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--brand-blue);
  background-color: var(--bg-blue-tint);
  padding: 2px 8px;
  border-radius: var(--radius-badge);
}

.guide-ribbon-main h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.guide-ribbon.featured h3 {
  font-size: 1.3125rem;
}

.guide-ribbon-main h3 a:hover {
  color: var(--brand-blue);
}

.guide-ribbon-main p {
  font-size: 0.875rem;
  color: var(--text-body);
  line-height: 1.5;
  margin: 0;
}

.guide-ribbon-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.guide-ribbon-arrow {
  color: var(--brand-blue);
  font-size: 1.125rem;
  font-weight: 700;
  transition: transform 0.15s ease;
}

.guide-ribbon:hover .guide-ribbon-arrow {
  transform: translateX(4px);
}

/* ==========================================================================
   07 / NOTES (Note Ribbons)
   ========================================================================== */
.notes-section {
  background-color: #FFFFFF;
}

.notes-stack {
  display: flex;
  flex-direction: column;
}

.note-ribbon {
  display: grid;
  grid-template-columns: 140px 1fr;
  align-items: center;
  padding: 22px 24px;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  margin-top: -1px;
  background-color: var(--bg-light);
}

.note-ribbon-tag {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--brand-blue);
}

.note-ribbon-text {
  font-size: 0.9375rem;
  color: var(--text-body);
  font-style: normal;
}

/* ==========================================================================
   08 / FAQ (FAQ Lines)
   ========================================================================== */
.faq-section {
  background-color: #FFFFFF;
}

.faq-lines-stack {
  display: flex;
  flex-direction: column;
}

.faq-line-item {
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  margin-top: -1px;
  background-color: #FFFFFF;
}

.faq-line-header {
  width: 100%;
  display: grid;
  grid-template-columns: 60px 1fr 40px;
  align-items: center;
  padding: 20px 24px;
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-main);
  transition: background-color 0.15s ease;
}

.faq-line-header:hover {
  background-color: var(--bg-light);
}

.faq-idx {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--brand-blue);
}

.faq-title {
  padding-right: 16px;
}

.faq-toggle-icon {
  font-size: 1.25rem;
  color: var(--text-muted);
  text-align: right;
  transition: transform 0.2s ease;
}

.faq-line-item.open .faq-toggle-icon {
  transform: rotate(45deg);
  color: var(--brand-blue);
}

.faq-line-body {
  display: none;
  padding: 0 24px 22px 84px;
  font-size: 0.9375rem;
  color: var(--text-body);
  line-height: 1.7;
}

.faq-line-item.open .faq-line-body {
  display: block;
}

/* ==========================================================================
   Footer (Compact Light Footer, Strictly #F1F2EE, Not huge black/blue)
   ========================================================================== */
.ribbon-footer {
  background-color: var(--bg-footer);
  border-top: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 48px 0 32px 0;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1.2fr;
  gap: 32px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--border-color);
}

.footer-brand-col .footer-logo-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.footer-brand-col .footer-logo-sub {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--brand-blue);
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 0.875rem;
  color: var(--text-body);
  line-height: 1.6;
  max-width: 280px;
}

.footer-nav-col h4 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.footer-nav-col ul {
  list-style: none;
}

.footer-nav-col li {
  margin-bottom: 8px;
}

.footer-nav-col a {
  font-size: 0.875rem;
  color: var(--text-body);
}

.footer-nav-col a:hover {
  color: var(--brand-blue);
}

.footer-cta-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-cta-col p {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-rec-sites {
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.8125rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-rec-sites strong {
  color: var(--text-main);
}

.footer-rec-sites a {
  color: var(--text-body);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-rec-sites a:hover {
  color: var(--brand-blue);
}

.footer-bottom-ribbon {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

/* ==========================================================================
   Article & Editorial Document Styles
   ========================================================================== */
.article-document-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 24px 80px 24px;
}

.breadcrumb-ribbon {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  font-family: var(--font-mono);
}

.breadcrumb-ribbon a {
  color: var(--text-body);
}

.breadcrumb-ribbon a:hover {
  color: var(--brand-blue);
}

.breadcrumb-sep {
  color: var(--border-color);
}

.article-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
  margin-bottom: 32px;
}

.article-category-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--brand-blue);
  background-color: var(--bg-blue-tint);
  border: 1px solid #D6DEFF;
  padding: 3px 10px;
  border-radius: var(--radius-badge);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.article-header h1 {
  font-size: 2.375rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.25;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.article-meta-ribbon {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* GEO Quick Answer Box */
.quick-answer {
  background-color: var(--bg-blue-tint);
  border: 1px solid #C8D6FF;
  border-left: 4px solid var(--brand-blue);
  padding: 24px 28px;
  margin-bottom: 36px;
  border-radius: var(--radius-badge);
}

.quick-answer h2 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--brand-blue);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.quick-answer p {
  font-size: 0.9375rem;
  color: var(--text-main);
  line-height: 1.7;
  margin: 0;
}

/* Article Table of Contents */
.article-toc {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 20px 24px;
  margin-bottom: 36px;
  border-radius: var(--radius-badge);
}

.article-toc-title {
  font-size: 0.875rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-main);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.article-toc ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article-toc li {
  font-size: 0.875rem;
}

.article-toc a {
  color: var(--text-body);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-toc a:hover {
  color: var(--brand-blue);
  text-decoration: underline;
}

/* Article Content Body */
.article-body {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--text-body);
}

.article-body h2 {
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 44px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-main);
  margin: 32px 0 12px 0;
}

.article-body p {
  margin-bottom: 1.25rem;
}

.article-body ul, .article-body ol {
  margin: 0 0 1.5rem 1.5rem;
}

.article-body li {
  margin-bottom: 0.5rem;
}

.article-body strong {
  color: var(--text-main);
  font-weight: 600;
}

/* Real HTML Table for Node Comparison */
.data-table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0;
  border: 1px solid var(--border-color);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9375rem;
}

.article-table th {
  background-color: var(--bg-secondary);
  color: var(--text-main);
  font-weight: 600;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.article-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-body);
}

.article-table tr:last-child td {
  border-bottom: none;
}

.article-table tr:hover td {
  background-color: var(--bg-light);
}

/* Article Inline CTA Ribbon */
.article-cta-band {
  background-color: var(--bg-light);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--signal-orange);
  padding: 24px 28px;
  margin: 40px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.article-cta-info h3 {
  font-size: 1.125rem;
  margin-bottom: 4px;
}

.article-cta-info p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0;
}

/* Step Block */
.step-item {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 20px 24px;
  margin-bottom: 16px;
  border-radius: var(--radius-badge);
}

.step-item-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.step-number {
  background-color: var(--brand-blue);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.step-item-head h4 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 0;
}

/* ==========================================================================
   Category Ribbon Index Styles
   ========================================================================== */
.category-hero-section {
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--border-color);
  padding: 48px 0 40px 0;
}

.cat-id-badge {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--brand-blue);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.category-hero-section h1 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.category-hero-desc {
  font-size: 1.0625rem;
  color: var(--text-body);
  max-width: 820px;
  line-height: 1.7;
}

/* ==========================================================================
   Static Pages (About, Terms, Privacy, Sitemap, 404)
   ========================================================================== */
.static-page-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 24px 80px 24px;
}

.static-page-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
  margin-bottom: 32px;
}

.static-page-header h1 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.sitemap-group {
  margin-bottom: 36px;
}

.sitemap-group-title {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--brand-blue);
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
  margin-bottom: 16px;
}

.sitemap-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sitemap-links-list li a {
  font-size: 0.9375rem;
  color: var(--text-body);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.sitemap-links-list li a:hover {
  color: var(--brand-blue);
}

.sitemap-url-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* 404 Page */
.error-page-wrap {
  text-align: center;
  padding: 100px 24px;
  max-width: 600px;
  margin: 0 auto;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 5rem;
  font-weight: 800;
  color: var(--brand-blue);
  line-height: 1;
  margin-bottom: 16px;
}

.error-tag {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--signal-orange);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

/* ==========================================================================
   Responsive Breakpoints: 1024px, 768px, 430px, 390px, 375px
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title-ribbon h1 {
    font-size: 2.5rem;
  }
  .matrix-header-row,
  .matrix-plan-row {
    grid-template-columns: 1.2fr 1fr 2fr 1.2fr 1.2fr;
  }
  .footer-top-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
  .footer-cta-col {
    grid-column: span 4;
  }
}

@media (max-width: 768px) {
  .header-nav, .header-cta-group {
    display: none;
  }
  .mobile-menu-btn {
    display: inline-block;
  }
  .mobile-nav-panel.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background-color: #FFFFFF;
    border-bottom: 1px solid var(--border-color);
    padding: 20px 24px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
    z-index: 99;
  }
  .mobile-nav-panel a {
    padding: 12px 0;
    font-size: 1rem;
    font-weight: 500;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
  }
  .mobile-nav-panel a:last-child {
    border-bottom: none;
  }

  .hero-meta-ribbon {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .hero-title-ribbon h1 {
    font-size: 2.125rem;
  }
  .hero-info-ribbon {
    grid-template-columns: 1fr 1fr;
  }
  .info-ribbon-block:nth-child(2) {
    border-right: none;
  }
  .info-ribbon-block:nth-child(1),
  .info-ribbon-block:nth-child(2) {
    border-bottom: 1px solid var(--border-color);
  }

  .capability-band {
    grid-template-columns: 50px 1fr;
    row-gap: 8px;
    min-height: auto;
    padding: 18px 16px;
  }
  .cap-content {
    grid-column: 1 / span 2;
    padding: 0;
  }
  .cap-arrow {
    display: none;
  }

  .region-ribbon {
    grid-template-columns: 1fr 40px;
    row-gap: 12px;
  }
  .region-nodes-list {
    grid-column: 1 / span 2;
  }

  .device-ribbon-strip {
    grid-template-columns: 1fr 1fr;
  }
  .device-strip-col:nth-child(2) {
    border-right: none;
  }
  .device-strip-col:nth-child(1),
  .device-strip-col:nth-child(2) {
    border-bottom: 1px solid var(--border-color);
  }

  .ai-ribbon-block, .media-ribbon-block {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 24px 20px;
  }

  /* Pricing Matrix transforms to Single Plan Ribbon on Mobile (No horizontal scroll!) */
  .matrix-header-row {
    display: none;
  }
  .matrix-plan-row {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 20px;
  }
  .plan-action-cell {
    width: 100%;
    text-align: left;
    margin-top: 8px;
  }
  .plan-action-cell .btn-primary,
  .plan-action-cell .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .guide-ribbon {
    grid-template-columns: 40px 1fr;
    row-gap: 8px;
    padding: 18px 16px;
  }
  .guide-ribbon-right {
    grid-column: 1 / span 2;
    justify-content: space-between;
  }

  .faq-line-header {
    grid-template-columns: 40px 1fr 30px;
    padding: 16px 18px;
    font-size: 0.9375rem;
  }
  .faq-line-body {
    padding: 0 18px 18px 58px;
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom-ribbon {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .footer-bottom-links {
    flex-wrap: wrap;
  }
}

@media (max-width: 430px) {
  .hero-title-ribbon h1 {
    font-size: 1.875rem;
  }
  .hero-cta-ribbon {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-cta-ribbon .btn-primary,
  .hero-cta-ribbon .btn-secondary,
  .hero-cta-ribbon .btn-link {
    text-align: center;
    justify-content: center;
  }

  .hero-info-ribbon {
    grid-template-columns: 1fr;
  }
  .info-ribbon-block {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }

  .device-ribbon-strip {
    grid-template-columns: 1fr;
  }
  .device-strip-col {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }

  .note-ribbon {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 16px 18px;
  }

  .article-header h1 {
    font-size: 1.875rem;
  }
}

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