/* ==========================================================================
   影子机场 (Yingzi Jichang) - 当代博物馆标牌与展陈导视视觉规范
   Contemporary Museum Placards & Exhibition Wayfinding Design System
   ========================================================================== */

:root {
  /* Museum Palette */
  --gallery-white: #FDFDFC;
  --deep-charcoal: #282B2A;
  --muted-ochre: #B29A65;
  --pale-gray-green: #E6E9E2;
  --ochre-tint: rgba(178, 154, 101, 0.12);
  --charcoal-tint: rgba(40, 43, 42, 0.04);
  --border-placard: rgba(40, 43, 42, 0.16);
  --border-subtle: rgba(40, 43, 42, 0.08);
  --border-strong: #282B2A;
  --card-bg: #FFFFFF;
  --pedestal-bg: #E6E9E2;

  /* Typography */
  --font-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", "STSong", serif;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;

  /* Spacing & Layout */
  --container-max: 1200px;
  --room-padding-y: 5rem;
  --room-padding-x: 1.5rem;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--gallery-white);
  color: var(--deep-charcoal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  background-color: var(--gallery-white);
  color: var(--deep-charcoal);
  overflow-x: hidden;
}

/* Museum Placard Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--deep-charcoal);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

/* H1 Specific Sizes */
h1 {
  font-size: 38px;
}
@media (min-width: 1024px) {
  h1 {
    font-size: 64px;
  }
}

h2 {
  font-size: 26px;
  margin-bottom: 0.75rem;
}
@media (min-width: 768px) {
  h2 {
    font-size: 36px;
  }
}

h3 {
  font-size: 20px;
  margin-bottom: 0.5rem;
}
@media (min-width: 768px) {
  h3 {
    font-size: 24px;
  }
}

p {
  margin-bottom: 1.2rem;
  color: #3D4240;
}

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

/* Monospace Navigation & Wayfinding Markers */
.marker, .wayfinding-label, .placard-tag, .room-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted-ochre);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.marker::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--muted-ochre);
}

/* Subtle Hover & Focus Animations Only - No neon, no floating */
a, button, summary, input, select {
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

:focus-visible {
  outline: 2px solid var(--muted-ochre);
  outline-offset: 3px;
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--room-padding-x);
  padding-right: var(--room-padding-x);
}

/* ==========================================================================
   Header & Museum Wayfinding Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(253, 253, 252, 0.96);
  border-bottom: 1px solid var(--border-placard);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--deep-charcoal);
  gap: 0.75rem;
}

.brand-link img {
  height: 40px;
  width: auto;
  display: block;
}

.nav-desktop {
  display: none;
}

@media (min-width: 960px) {
  .nav-desktop {
    display: flex;
    align-items: center;
    gap: 2rem;
  }
}

.nav-desktop a {
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--deep-charcoal);
  padding: 0.5rem 0.25rem;
  position: relative;
}

.nav-desktop a:hover {
  color: var(--muted-ochre);
}

.nav-desktop a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--muted-ochre);
  transition: width 0.2s ease;
}

.nav-desktop a:hover::after {
  width: 100%;
}

.header-cta-group {
  display: none;
  align-items: center;
  gap: 1rem;
}

@media (min-width: 960px) {
  .header-cta-group {
    display: flex;
  }
}

/* Museum Placard Style Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.6rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  text-decoration: none;
  border: 1px solid var(--deep-charcoal);
  cursor: pointer;
  background: transparent;
  color: var(--deep-charcoal);
  text-align: center;
  min-height: 44px;
}

.btn-primary {
  background-color: var(--deep-charcoal);
  color: var(--gallery-white);
  border-color: var(--deep-charcoal);
}

.btn-primary:hover {
  background-color: #3D4240;
  border-color: #3D4240;
}

.btn-secondary {
  background-color: transparent;
  color: var(--deep-charcoal);
  border-color: var(--border-placard);
}

.btn-secondary:hover {
  border-color: var(--deep-charcoal);
  background-color: var(--pale-gray-green);
}

.btn-ochre {
  background-color: var(--muted-ochre);
  color: #FFFFFF;
  border-color: var(--muted-ochre);
}

.btn-ochre:hover {
  background-color: #9C8554;
  border-color: #9C8554;
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--border-placard);
  cursor: pointer;
  padding: 8px;
}

@media (min-width: 960px) {
  .mobile-toggle {
    display: none;
  }
}

.mobile-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--deep-charcoal);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.mobile-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Navigation Panel */
.nav-mobile {
  display: none;
  position: absolute;
  top: 72px;
  left: 0;
  right: 0;
  background-color: var(--gallery-white);
  border-bottom: 2px solid var(--deep-charcoal);
  padding: 1.5rem var(--room-padding-x) 2rem;
  box-shadow: 0 10px 30px rgba(40, 43, 42, 0.08);
}

.nav-mobile.is-open {
  display: block;
}

.nav-mobile ul {
  list-style: none;
  margin-bottom: 1.5rem;
}

.nav-mobile li {
  border-bottom: 1px solid var(--border-subtle);
}

.nav-mobile a {
  display: block;
  padding: 0.85rem 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--deep-charcoal);
}

.nav-mobile a:hover {
  color: var(--muted-ochre);
}

.nav-mobile-cta {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ==========================================================================
   Exhibition Rooms Layout System
   ========================================================================== */
.exhibit-room {
  padding-top: var(--room-padding-y);
  padding-bottom: var(--room-padding-y);
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
}

.room-alt {
  background-color: #F8F9F6;
}

.room-pale {
  background-color: var(--pale-gray-green);
}

.room-header {
  margin-bottom: 3rem;
  position: relative;
}

.room-meta-badge {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.room-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--muted-ochre);
}

.room-divider-line {
  height: 1px;
  background-color: var(--border-placard);
  flex-grow: 1;
}

.room-description {
  max-width: 760px;
  font-size: 1.0625rem;
  color: #4C524F;
  margin-top: 0.5rem;
}

/* ==========================================================================
   Hero Room // Gallery Entry
   ========================================================================== */
.hero-room {
  padding-top: 4rem;
  padding-bottom: 5rem;
}

@media (min-width: 1024px) {
  .hero-room {
    padding-top: 5rem;
    padding-bottom: 6rem;
  }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: start;
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 4rem;
  }
}

.hero-copy {
  display: flex;
  flex-direction: column;
}

.hero-eyebrow {
  margin-bottom: 1.25rem;
}

.hero-title {
  margin-bottom: 1.5rem;
  line-height: 1.15;
}

.hero-summary {
  font-size: 1.125rem;
  line-height: 1.8;
  color: #3D4240;
  margin-bottom: 2.25rem;
  border-left: 2px solid var(--muted-ochre);
  padding-left: 1.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-notice {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #6C726F;
  letter-spacing: 0.05em;
  background: var(--pale-gray-green);
  padding: 0.75rem 1rem;
  border-left: 3px solid var(--deep-charcoal);
}

/* Hero Network Exhibit Diagram (Numbered Locations) */
.network-exhibit {
  background-color: var(--card-bg);
  border: 1px solid var(--border-placard);
  padding: 1.75rem;
  position: relative;
}

.network-exhibit::before {
  content: "EXHIBIT NO. NET-01 // TOPOLOGY DIAGRAM";
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--muted-ochre);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.diagram-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1.5rem;
}

.diagram-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--deep-charcoal);
}

.diagram-status {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #4C524F;
}

.node-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.node-item {
  border: 1px solid var(--border-subtle);
  background-color: var(--gallery-white);
  padding: 1rem;
  position: relative;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.node-item:hover {
  border-color: var(--muted-ochre);
  background-color: #FAFBF9;
}

.node-item-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.4rem;
}

.node-num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--muted-ochre);
}

.node-region {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--deep-charcoal);
}

.node-type {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 6px;
  background-color: var(--pale-gray-green);
  color: var(--deep-charcoal);
}

.node-desc {
  font-size: 0.875rem;
  color: #5D6360;
  line-height: 1.5;
  margin-bottom: 0;
}

.diagram-footer-note {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--border-placard);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: #6C726F;
  line-height: 1.5;
}

/* ==========================================================================
   Exhibit Panels // Three Advantages
   ========================================================================== */
.panels-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 960px) {
  .panels-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.exhibit-panel {
  background-color: var(--card-bg);
  border: 1px solid var(--border-placard);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  position: relative;
}

.exhibit-panel:hover {
  border-color: var(--deep-charcoal);
}

.panel-index {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--muted-ochre);
  margin-bottom: 1rem;
  display: block;
}

.panel-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin-bottom: 1rem;
}

.panel-content {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: #4C524F;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.panel-spec {
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #6C726F;
}

/* ==========================================================================
   Dedicated AI Room & Streaming Room (Full Width Rooms)
   ========================================================================== */
.scenario-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .scenario-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .scenario-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.scenario-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-placard);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
}

.scenario-card:hover {
  border-color: var(--muted-ochre);
}

.scenario-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.scenario-platform {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--deep-charcoal);
}

.scenario-badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  background-color: var(--pale-gray-green);
  color: var(--deep-charcoal);
  padding: 2px 6px;
}

.scenario-desc {
  font-size: 0.9rem;
  color: #4C524F;
  line-height: 1.65;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.scenario-protocol {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted-ochre);
  border-top: 1px dashed var(--border-subtle);
  padding-top: 0.75rem;
}

/* ==========================================================================
   Pricing Information Board
   ========================================================================== */
.pricing-board {
  background-color: var(--card-bg);
  border: 2px solid var(--deep-charcoal);
  padding: 2.5rem 2rem;
  margin-bottom: 2rem;
}

.board-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 2.5rem;
}

.board-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted-ochre);
  letter-spacing: 0.16em;
  margin-bottom: 0.5rem;
  display: block;
}

.board-title {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

@media (min-width: 960px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pricing-card {
  border: 1px solid var(--border-placard);
  padding: 2rem 1.5rem;
  background-color: var(--gallery-white);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card.featured {
  border: 2px solid var(--muted-ochre);
  background-color: #FFFFFF;
}

.pricing-card.featured::after {
  content: "推荐配置 SPEC. POPULAR";
  position: absolute;
  top: -12px;
  left: 20px;
  background-color: var(--muted-ochre);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  padding: 2px 10px;
  letter-spacing: 0.08em;
}

.tier-name {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

.tier-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted-ochre);
  margin-bottom: 1.25rem;
}

.tier-price-box {
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

.tier-price-row {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  margin-bottom: 0.35rem;
}

.tier-price-currency {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--deep-charcoal);
}

.tier-price-number {
  font-family: var(--font-serif);
  font-size: 2.75rem;
  font-weight: 700;
  line-height: 1;
  color: var(--deep-charcoal);
  letter-spacing: -0.02em;
}

.pricing-card.featured .tier-price-number {
  color: var(--muted-ochre);
}

.tier-price-unit {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: #6C726F;
  letter-spacing: 0.05em;
}

.tier-discount-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background-color: var(--pale-gray-green);
  color: var(--deep-charcoal);
  padding: 3px 8px;
  margin-bottom: 0.6rem;
  border: 1px solid var(--border-placard);
}

.tier-placeholder {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  background-color: var(--pale-gray-green);
  color: var(--deep-charcoal);
  padding: 0.4rem 0.75rem;
  margin-bottom: 0.5rem;
}

.tier-note {
  font-size: 0.8125rem;
  color: #6C726F;
  line-height: 1.5;
}

.tier-features {
  list-style: none;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.tier-features li {
  font-size: 0.875rem;
  color: #3D4240;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.tier-features li::before {
  content: "+";
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--muted-ochre);
}

.pricing-disclaimer {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #6C726F;
  background-color: var(--pale-gray-green);
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--muted-ochre);
}

/* ==========================================================================
   Curated Reading Wall // 9 SEO Articles (3/2/1 Grid)
   ========================================================================== */
.reading-wall-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .reading-wall-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .reading-wall-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.curated-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-placard);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.curated-card:hover {
  border-color: var(--deep-charcoal);
  background-color: #FAFBF9;
}

.card-archive-no {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--muted-ochre);
  margin-bottom: 0.75rem;
}

.card-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--deep-charcoal);
  line-height: 1.4;
  margin-bottom: 0.75rem;
}

.curated-card:hover .card-title {
  color: var(--muted-ochre);
}

.card-abstract {
  font-size: 0.875rem;
  line-height: 1.65;
  color: #5D6360;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.card-read-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #7D8380;
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.75rem;
}

/* ==========================================================================
   Testimonial Samples (Visibly Sample Records)
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.testimonial-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-placard);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
}

.testimonial-quote {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: #3D4240;
  margin-bottom: 1.25rem;
  flex-grow: 1;
  position: relative;
}

.testimonial-author {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--deep-charcoal);
}

.testimonial-meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted-ochre);
}

.sample-notice-banner {
  margin-top: 1.5rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #6C726F;
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-placard);
  background-color: var(--card-bg);
}

.faq-trigger {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 1.25rem 1.5rem;
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--deep-charcoal);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.faq-trigger:hover {
  background-color: #FAFBF9;
}

.faq-icon {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--muted-ochre);
  transition: transform 0.2s ease;
}

.faq-trigger[aria-expanded="true"] .faq-icon {
  transform: rotate(45deg);
}

.faq-content {
  display: none;
  padding: 0 1.5rem 1.5rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: #4C524F;
}

.faq-content.is-expanded {
  display: block;
}

/* ==========================================================================
   Article Detail & Subpage Layouts
   ========================================================================== */
.subpage-hero {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--border-placard);
  background-color: #F8F9F6;
}

.breadcrumb-nav {
  margin-bottom: 1.5rem;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #6C726F;
}

.breadcrumb-list a {
  text-decoration: none;
  color: var(--deep-charcoal);
}

.breadcrumb-list a:hover {
  color: var(--muted-ochre);
}

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

.article-container {
  max-width: 860px;
  margin: 0 auto;
  padding-top: 3.5rem;
  padding-bottom: 5rem;
}

.article-content {
  font-size: 1rem;
  line-height: 1.85;
  color: #333835;
}

.article-content h2 {
  font-size: 1.75rem;
  margin-top: 2.75rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-placard);
}

.article-content h3 {
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.article-content ul, .article-content ol {
  margin-left: 1.5rem;
  margin-bottom: 1.5rem;
}

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

.article-callout {
  background-color: var(--pale-gray-green);
  border-left: 3px solid var(--muted-ochre);
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
  font-size: 0.9375rem;
}

.article-table-wrap {
  overflow-x: auto;
  margin: 2rem 0;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  text-align: left;
}

.data-table th, .data-table td {
  padding: 0.85rem 1rem;
  border: 1px solid var(--border-placard);
}

.data-table th {
  background-color: var(--pale-gray-green);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--deep-charcoal);
}

.data-table td {
  background-color: #FFFFFF;
}

.related-articles-box {
  margin-top: 3.5rem;
  padding: 2rem;
  border: 1px solid var(--border-placard);
  background-color: #F8F9F6;
}

.related-articles-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
}

.related-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.related-links-list a {
  text-decoration: none;
  font-size: 0.9375rem;
  color: var(--deep-charcoal);
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
}

.related-links-list a::before {
  content: "->";
  font-family: var(--font-mono);
  color: var(--muted-ochre);
}

.related-links-list a:hover {
  color: var(--muted-ochre);
}

/* ==========================================================================
   Footer & Archive Colophon
   ========================================================================== */
.site-footer {
  background-color: #242625;
  color: #DDE1D8;
  border-top: 3px solid var(--muted-ochre);
  padding: 4.5rem 0 3rem;
  font-size: 0.875rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3.5rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
}

.footer-brand-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: #FDFDFC;
  margin-bottom: 0.75rem;
}

.footer-desc {
  font-size: 0.875rem;
  line-height: 1.7;
  color: #A6ACA4;
  margin-bottom: 1.5rem;
}

.footer-nav-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--muted-ochre);
  margin-bottom: 1.25rem;
  text-transform: uppercase;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  text-decoration: none;
  color: #C7CCC4;
  font-size: 0.875rem;
}

.footer-links a:hover {
  color: var(--muted-ochre);
}

.footer-bottom {
  border-top: 1px solid rgba(221, 225, 216, 0.12);
  padding-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #8C928A;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
  }
}