/* ==========================================================================
   KELAYUN - DIGITAL PUBLICATION SYSTEM
   Core Stylesheet
   Design Ethos: Content-First, Commerce-Integrated, Editorial Typography
   ========================================================================== */

:root {
  /* Color Palette */
  --bg-main: #FCFBF7;
  --bg-white: #FFFFFF;
  --bg-paper: #F1EFE9;
  --bg-stone: #E8E4DA;
  --bg-stone-subtle: #F6F4EE;

  --text-main: #161616;
  --text-body: #454744;
  --text-muted: #777A76;

  --pub-blue: #284B63;
  --pub-blue-hover: #1e3749;
  --editorial-red: #B64B3C;
  --editorial-red-hover: #983e32;
  --muted-green: #667A68;

  --border-color: #D9D7D0;
  --border-subtle: #E8E6DF;
  --border-dark: #161616;

  /* Typography */
  --font-serif: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;

  /* Spacing */
  --site-max-width: 1240px;
  --article-body-width: 780px;
  --header-max-height: 130px;
  --radius-sm: 4px;
  --radius-md: 8px;
}

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

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

body {
  background-color: var(--bg-main);
  color: var(--text-body);
  font-family: var(--font-sans);
  line-height: 1.7;
  font-size: 1rem;
  letter-spacing: -0.01em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Global Container */
.container {
  width: 100%;
  max-width: var(--site-max-width);
  margin: 0 auto;
  padding: 0 24px;
}

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

a:hover {
  color: var(--pub-blue);
}

:focus-visible {
  outline: 2px solid var(--pub-blue);
  outline-offset: 2px;
}

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

/* Button & Commercial CTA Styles */
.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--pub-blue);
  color: #FFFFFF !important;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--pub-blue);
  transition: background-color 0.15s ease, transform 0.1s ease;
  white-space: nowrap;
}

.btn-cta:hover {
  background-color: var(--pub-blue-hover);
  border-color: var(--pub-blue-hover);
  color: #FFFFFF !important;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  color: var(--text-main);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  transition: all 0.15s ease;
  white-space: nowrap;
}

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

.badge-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 2px;
  background-color: var(--bg-paper);
  color: var(--pub-blue);
  border: 1px solid var(--border-color);
}

.badge-red {
  background-color: #fdf2f0;
  color: var(--editorial-red);
  border-color: #f1cfc9;
}

.badge-green {
  background-color: #f0f5f1;
  color: var(--muted-green);
  border-color: #d1dfd3;
}

/* ==========================================================================
   HEADER / PUBLICATION MASTHEAD (3 Layers, <= 130px Desktop)
   ========================================================================== */
.publication-masthead {
  background-color: var(--bg-main);
  border-bottom: 2px solid var(--text-main);
  position: sticky;
  top: 0;
  z-index: 1000;
}

/* Layer 1: Utility Bar */
.utility-bar {
  background-color: var(--bg-paper);
  border-bottom: 1px solid var(--border-color);
  height: 32px;
  font-size: 11.5px;
  color: var(--text-muted);
}

.utility-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.utility-left {
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: 0.05em;
  font-weight: 600;
  color: var(--text-main);
  text-transform: uppercase;
}

.utility-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.utility-right a {
  color: var(--text-muted);
}

.utility-right a:hover {
  color: var(--pub-blue);
}

/* Layer 2: Brand Masthead */
.brand-masthead {
  height: 60px;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-main);
}

.brand-masthead .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

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

.brand-logo-text {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
  line-height: 1;
}

.brand-edition-sub {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--editorial-red);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.masthead-center {
  text-align: center;
}

.masthead-center-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.1;
  text-transform: uppercase;
}

.masthead-center-sub {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: 2px;
}

.masthead-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.masthead-plan-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  border-radius: var(--radius-sm);
}

/* Layer 3: Category Navigation */
.category-nav {
  height: 36px;
  background-color: var(--bg-main);
}

.category-nav .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}

.category-nav .container::-webkit-scrollbar {
  display: none;
}

.category-nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  width: 100%;
  justify-content: space-between;
}

.category-nav-list a {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: all 0.15s ease;
}

.category-nav-list a:hover,
.category-nav-list a.active {
  color: var(--editorial-red);
  border-bottom-color: var(--editorial-red);
}

/* Mobile Drawer */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-main);
  z-index: 999;
  padding: 24px;
  border-top: 1px solid var(--border-color);
  overflow-y: auto;
}

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

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 28px;
}

.mobile-nav-links a {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
  display: block;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-nav-cta {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ==========================================================================
   HOMEPAGE: SECTION 1 - DIGITAL MAGAZINE COVER (3 Columns)
   ========================================================================== */
.cover-header-strip {
  padding: 14px 0 10px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.cover-header-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* Single H1 for Homepage */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.magazine-cover-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 36px;
  padding-bottom: 32px;
  border-bottom: 2px solid var(--text-main);
  height: auto;
  min-height: auto;
  align-items: start;
}

/* Left Column: Main Cover Story (~50%) */
.cover-story-main {
  display: flex;
  flex-direction: column;
  gap: 16px;
  height: auto;
  min-height: auto;
}

.cover-story-main .badge-bar {
  display: flex;
  align-items: center;
  gap: 10px;
}

.cover-story-number {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--editorial-red);
  letter-spacing: 0.05em;
  margin-right: 2px;
}

.cover-headline-lead {
  font-family: var(--font-serif);
  font-size: 2.35rem; /* ~38-46px, within 44-64px limit */
  line-height: 1.22;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.cover-headline-lead a:hover {
  color: var(--editorial-red);
}

.cover-summary {
  font-size: 1.05rem;
  color: var(--text-body);
  line-height: 1.7;
}

.cover-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.cover-read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  color: var(--pub-blue);
  font-size: 0.95rem;
  margin-top: 4px;
}

.cover-read-more:hover {
  color: var(--pub-blue-hover);
  text-decoration: underline;
}

/* Right Stack: Story 02 & Story 03 + Service */
.cover-right-stack {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.cover-secondary-card {
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cover-card-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
}

.cover-card-title a:hover {
  color: var(--editorial-red);
}

.cover-card-summary {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.6;
}

/* Cover Service Module */
.cover-service-insert {
  background-color: var(--bg-paper);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--pub-blue);
  padding: 20px;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.service-insert-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.service-insert-tag {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--pub-blue);
  text-transform: uppercase;
}

.service-insert-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

.service-insert-features {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-main);
}

.service-insert-features li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.service-insert-features li::before {
  content: "•";
  color: var(--pub-blue);
  font-weight: bold;
}

/* ==========================================================================
   HOMEPAGE: SECTION 2 - LATEST / 最新文章 (2 Column Feed)
   ========================================================================== */
.section-latest {
  padding: 48px 0;
  border-bottom: 1px solid var(--border-color);
}

.editorial-section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 32px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.editorial-section-title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.editorial-section-tag {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--editorial-red);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.latest-layout-grid {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 40px;
}

.latest-sidebar-indicator {
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-top: 3px solid var(--text-main);
  padding-top: 12px;
}

.latest-indicator-huge {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-main);
}

.latest-indicator-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.latest-feed-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 36px;
  row-gap: 32px;
}

.feed-article-item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.feed-article-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-main);
}

.feed-article-title a:hover {
  color: var(--pub-blue);
}

.feed-article-summary {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.6;
}

.feed-article-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  gap: 12px;
}

/* ==========================================================================
   HOMEPAGE: SECTION 3 - PRODUCT INSERT (Magazine Editorial Feature)
   ========================================================================== */
.section-product-insert {
  padding: 48px 0;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-paper);
}

.product-insert-layout {
  display: grid;
  grid-template-columns: 4fr 6fr;
  gap: 48px;
  align-items: start;
}

.product-insert-left {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding-right: 24px;
  border-right: 1px solid var(--border-color);
}

.product-insert-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-main);
}

.product-insert-desc {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.7;
}

.product-insert-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
}

.product-insert-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.product-spec-row {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-color);
}

.product-spec-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.spec-category-label {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--pub-blue);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.spec-category-items {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.5;
}

/* ==========================================================================
   HOMEPAGE: SECTION 4 - REGION REPORT (Magazine Data Page)
   ========================================================================== */
.section-region-report {
  padding: 48px 0;
  border-bottom: 1px solid var(--border-color);
}

.region-layout-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 48px;
}

.region-sidebar-title {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.1;
  border-top: 3px solid var(--text-main);
  padding-top: 12px;
}

.region-sidebar-year {
  font-size: 0.85rem;
  color: var(--editorial-red);
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-top: 4px;
}

.region-data-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.region-column {
  border-left: 1px solid var(--border-color);
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.region-column-header {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.region-name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

.region-count-badge {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.region-location-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--text-body);
}

.region-location-list li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.region-location-list li::before {
  content: "—";
  color: var(--border-color);
  font-size: 0.8rem;
}

.region-guide-link {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--pub-blue);
  margin-top: 8px;
  display: inline-block;
}

.region-guide-link:hover {
  text-decoration: underline;
}

/* ==========================================================================
   HOMEPAGE: SECTION 5 - SPECIAL REPORT (AI + Streaming)
   ========================================================================== */
.section-special-report {
  padding: 48px 0;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-main);
}

.special-report-mast {
  border-top: 2px solid var(--text-main);
  padding-top: 14px;
  margin-bottom: 24px;
}

.special-report-sub {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--editorial-red);
  text-transform: uppercase;
}

.special-report-title {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
  margin-top: 6px;
}

.special-report-grid {
  display: grid;
  grid-template-columns: 6.5fr 3.5fr;
  gap: 40px;
}

.special-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 24px;
  background-color: var(--bg-paper);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

.special-col-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
}

.special-col-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
}

.special-col-badge {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--pub-blue);
}

.special-tag-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tool-chip {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  border-radius: var(--radius-sm);
}

.special-col-desc {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.6;
}

.special-read-link {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--pub-blue);
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.special-read-link:hover {
  color: var(--pub-blue-hover);
  text-decoration: underline;
}

/* ==========================================================================
   HOMEPAGE: SECTION 6 - EDITORIAL PRICING DIRECTORY (Buying Guide Table)
   ========================================================================== */
.section-pricing-directory {
  padding: 48px 0;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-paper);
}

.pricing-table-container {
  overflow-x: auto;
  margin-top: 24px;
}

.pricing-editorial-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  text-align: left;
}

.pricing-editorial-table caption {
  text-align: left;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-style: italic;
}

.pricing-editorial-table th {
  background-color: var(--bg-stone);
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 14px 18px;
  border-bottom: 2px solid var(--border-dark);
}

.pricing-editorial-table td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.92rem;
  color: var(--text-body);
  vertical-align: middle;
}

.pricing-editorial-table tbody tr:hover {
  background-color: #faf9f5;
}

.plan-name-cell {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.plan-price-period {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   HOMEPAGE: SECTION 7 - EDITORIAL DESK (Homepage Core Blog, 9 Articles)
   ========================================================================== */
.section-editorial-desk {
  padding: 48px 0;
  border-bottom: 1px solid var(--border-color);
}

.desk-layout-container {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.desk-top-tier {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 36px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border-color);
}

.desk-lead-story {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.desk-lead-title {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-main);
}

.desk-lead-title a:hover {
  color: var(--editorial-red);
}

.desk-secondary-column {
  display: flex;
  flex-direction: column;
  gap: 24px;
  border-left: 1px solid var(--border-color);
  padding-left: 28px;
}

.desk-secondary-story {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.desk-secondary-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-main);
}

.desk-secondary-title a:hover {
  color: var(--pub-blue);
}

.desk-tutorials-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border-color);
}

.tutorial-row-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tutorial-row-tag {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--pub-blue);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.tutorial-row-title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-main);
}

.tutorial-row-title a:hover {
  color: var(--editorial-red);
}

.tutorial-row-summary {
  font-size: 0.85rem;
  color: var(--text-body);
  line-height: 1.55;
}

.desk-briefs-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.brief-item {
  padding: 16px;
  background-color: var(--bg-paper);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.brief-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.brief-title {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.35;
}

.brief-title a:hover {
  color: var(--pub-blue);
}

/* ==========================================================================
   HOMEPAGE: SECTION 8 - READER QUESTIONS (FAQ)
   ========================================================================== */
.section-faq {
  padding: 48px 0;
  border-bottom: 1px solid var(--border-color);
}

.faq-layout-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
}

.faq-sidebar-header {
  border-top: 3px solid var(--text-main);
  padding-top: 12px;
}

.faq-sidebar-title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.1;
}

.faq-sidebar-sub {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 8px;
}

.faq-two-column-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 40px;
  row-gap: 28px;
}

.faq-item {
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
}

.faq-question {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.4;
}

.faq-answer {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.65;
}

/* ==========================================================================
   FOOTER: PUBLICATION FOOTER (Compact, 260-330px Desktop, #E8E4DA)
   ========================================================================== */
.publication-footer {
  background-color: var(--bg-stone);
  color: var(--text-main);
  border-top: 2px solid var(--text-main);
  margin-top: auto;
  padding: 40px 0 24px;
}

.footer-top-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.footer-brand-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
}

.footer-brand-sub {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: 2px;
}

.footer-links-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--border-color);
}

.footer-col-title {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--text-main);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.footer-col-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.85rem;
}

.footer-col-list a {
  color: var(--text-body);
}

.footer-col-list a:hover {
  color: var(--pub-blue);
  text-decoration: underline;
}

.footer-bottom-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-legal-links {
  display: flex;
  gap: 18px;
}

.footer-legal-links a:hover {
  color: var(--text-main);
}

/* ==========================================================================
   ARTICLE / SECTION PAGE COMMON STYLES
   ========================================================================== */
.breadcrumb-nav {
  padding: 14px 0;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.breadcrumb-list li::after {
  content: "/";
  margin-left: 6px;
  color: var(--border-color);
}

.breadcrumb-list li:last-child::after {
  content: "";
}

.article-container {
  max-width: var(--article-body-width);
  margin: 0 auto;
  padding: 40px 24px 60px;
}

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

.article-header-category {
  margin-bottom: 12px;
}

.article-main-h1 {
  font-family: var(--font-serif);
  font-size: 2.35rem; /* ~38-52px */
  line-height: 1.25;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.article-lead {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-body);
  font-weight: 400;
  margin-bottom: 20px;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* GEO Quick Answer Box */
.quick-answer {
  background-color: var(--bg-paper);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--editorial-red);
  padding: 22px;
  border-radius: var(--radius-sm);
  margin: 28px 0;
}

.quick-answer h2 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--editorial-red);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.quick-answer p {
  font-size: 0.98rem;
  color: var(--text-main);
  line-height: 1.7;
  margin: 0;
}

/* Table of Contents */
.toc-box {
  background-color: var(--bg-stone-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin: 28px 0;
}

.toc-title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

.toc-list {
  list-style: decimal;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
}

.toc-list a {
  color: var(--pub-blue);
}

.toc-list a:hover {
  text-decoration: underline;
}

/* Article Typography & Markdown Elements */
.article-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-body);
}

.article-content h2 {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.article-content h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 28px 0 12px;
}

.article-content p {
  margin-bottom: 20px;
}

.article-content ul,
.article-content ol {
  margin: 0 0 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article-content li {
  line-height: 1.7;
}

.article-content strong {
  color: var(--text-main);
  font-weight: 700;
}

.article-content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background-color: var(--bg-paper);
  border: 1px solid var(--border-color);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--editorial-red);
}

.article-content blockquote {
  border-left: 3px solid var(--pub-blue);
  padding: 12px 20px;
  background-color: var(--bg-paper);
  margin: 24px 0;
  font-style: italic;
  color: var(--text-main);
}

/* Figure & Captions */
.article-content figure {
  margin: 32px 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--bg-paper);
  overflow: hidden;
}

.article-content figcaption {
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 10px 16px;
  background-color: var(--bg-stone-subtle);
  border-top: 1px solid var(--border-color);
  text-align: center;
}

/* In-article Table */
.data-table-wrapper {
  overflow-x: auto;
  margin: 28px 0;
}

.content-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  font-size: 0.92rem;
}

.content-table th {
  background-color: var(--bg-stone);
  color: var(--text-main);
  font-weight: 700;
  padding: 12px 16px;
  border-bottom: 2px solid var(--border-dark);
  text-align: left;
}

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

.content-table tr:hover {
  background-color: #faf9f5;
}

/* In-article Callout Box */
.commercial-callout-box {
  background-color: var(--bg-paper);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--pub-blue);
  padding: 24px;
  border-radius: var(--radius-sm);
  margin: 36px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.commercial-callout-box h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--text-main);
  margin: 0;
}

.commercial-callout-box p {
  margin: 0;
  font-size: 0.95rem;
}

/* Related Content Section */
.related-articles-section {
  margin-top: 50px;
  padding-top: 32px;
  border-top: 2px solid var(--text-main);
}

.related-section-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.related-card {
  padding: 16px;
  background-color: var(--bg-paper);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-card-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-main);
}

.related-card-title a:hover {
  color: var(--pub-blue);
}

/* ==========================================================================
   CATEGORY / SECTION ARCHIVE PAGE STYLES
   ========================================================================== */
.section-hero-banner {
  padding: 40px 0 28px;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-paper);
}

.section-label {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--editorial-red);
  text-transform: uppercase;
}

.section-h1-title {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 8px 0 12px;
}

.section-desc-lead {
  font-size: 1.05rem;
  color: var(--text-body);
  max-width: 800px;
  line-height: 1.7;
}

.category-articles-layout {
  padding: 48px 0;
}

.category-featured-box {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 36px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 40px;
}

.category-article-feed {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

/* ==========================================================================
   INDEX / DIRECTORY PAGES (Sitemap, 404, Legal)
   ========================================================================== */
.sitemap-group-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
  margin: 36px 0;
}

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

.sitemap-col-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  border-bottom: 2px solid var(--border-dark);
  padding-bottom: 6px;
}

.sitemap-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.92rem;
}

.sitemap-links a {
  color: var(--pub-blue);
}

.sitemap-links a:hover {
  text-decoration: underline;
}

.error-page-container {
  padding: 80px 24px;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.error-code {
  font-family: var(--font-serif);
  font-size: 5rem;
  font-weight: 900;
  color: var(--editorial-red);
  line-height: 1;
}

.error-title {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 12px 0;
}

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES (Mobile 375, 390, 430, 768, 1024, 1440)
   ========================================================================== */
@media (max-width: 1024px) {
  .magazine-cover-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .cover-story-main {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 24px;
  }

  .product-insert-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .product-insert-left {
    border-right: none;
    padding-right: 0;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 24px;
  }

  .region-layout-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .region-data-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .special-report-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .desk-top-tier {
    grid-template-columns: 1fr;
  }

  .desk-secondary-column {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
  }

  .desk-tutorials-strip,
  .desk-briefs-strip {
    grid-template-columns: 1fr;
  }

  .faq-layout-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-links-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .sitemap-group-grid {
    grid-template-columns: 1fr 1fr;
  }

  .category-featured-box {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .utility-bar {
    display: none; /* Hide layer 1 on mobile */
  }

  .category-nav {
    display: none; /* Hide layer 3 directly on mobile, move to menu */
  }

  .masthead-center {
    display: none;
  }

  .mobile-menu-btn {
    display: inline-block;
  }

  .brand-masthead .container {
    height: 54px;
  }

  .latest-layout-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .latest-feed-grid {
    grid-template-columns: 1fr;
  }

  .region-data-grid {
    grid-template-columns: 1fr;
  }

  .region-column {
    border-left: none;
    border-top: 1px solid var(--border-color);
    padding-left: 0;
    padding-top: 16px;
  }

  .faq-two-column-list {
    grid-template-columns: 1fr;
  }

  .category-article-feed {
    grid-template-columns: 1fr;
  }

  .cover-headline-lead {
    font-size: 1.85rem; /* 30-38px */
  }

  .article-main-h1 {
    font-size: 1.75rem; /* 28-36px */
  }

  .footer-top-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .footer-bottom-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .footer-links-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .sitemap-group-grid {
    grid-template-columns: 1fr;
  }

  /* Pricing table mobile conversion */
  .pricing-editorial-table thead {
    display: none;
  }

  .pricing-editorial-table,
  .pricing-editorial-table tbody,
  .pricing-editorial-table tr,
  .pricing-editorial-table td {
    display: block;
    width: 100%;
  }

  .pricing-editorial-table tr {
    border-bottom: 2px solid var(--border-color);
    padding: 16px;
  }

  .pricing-editorial-table td {
    border: none;
    padding: 6px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .pricing-editorial-table td::before {
    content: attr(data-label);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
  }

  .pricing-editorial-table td:last-child {
    margin-top: 8px;
    justify-content: flex-end;
  }
}

/* Accessibility & Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}