/* ==========================================================================
   魔戒机场 (Mojie Cloud) - Modern Digital Newspaper Theme
   Aesthetic: White Background, Crisp Black Newsprint, Muted Cobalt Accents,
   Serif Display Headlines, Narrow Uppercase Kickers, Fine Rules & Grid Columns.
   Fully Mobile-First Responsive, High Readability, Semantic SEO Architecture.
   ========================================================================== */

:root {
  /* Newspaper Color Palette */
  --bg-page: #ffffff;
  --bg-paper: #fafafa;
  --bg-sidebar: #f8fafc;
  --bg-highlight: #eff6ff;
  --bg-dark-banner: #0f172a;
  
  /* Newsprint Typography Colors */
  --text-main: #111827;        /* Pitch Black Ink */
  --text-article: #1f2937;     /* High Legibility Article Body */
  --text-secondary: #4b5563;   /* Editorial Secondary Gray */
  --text-muted: #6b7280;       /* Byline / Dateline Gray */
  --text-light: #9ca3af;
  
  /* Muted Cobalt Palette (Authoritative, Prestigious, Intellectual) */
  --cobalt-primary: #1e40af;   /* Muted Cobalt 800 */
  --cobalt-deep: #172554;      /* Deep Navy Cobalt 950 */
  --cobalt-bright: #2563eb;    /* Active Hover Cobalt 600 */
  --cobalt-subtle: #dbeafe;    /* Light Cobalt Wash 100 */
  --cobalt-tag-bg: #eff6ff;    /* Tag Background 50 */
  --cobalt-border: #93c5fd;    /* Soft Cobalt Border */

  /* Hairlines & Newspaper Rules */
  --rule-strong: #111827;      /* Primary Ink Rule */
  --rule-medium: #cbd5e1;      /* Column Divider Rule */
  --rule-hairline: #e2e8f0;    /* Hairline Grid Border */
  --rule-subtle: #f1f5f9;
  
  /* Status Colors */
  --status-green: #15803d;
  --status-green-bg: #f0fdf4;
  --status-amber: #b45309;
  
  /* Typography Stacks */
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", "Playfair Display", "Times New Roman", Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  
  /* Layout Dimensions */
  --max-width: 1240px;
  --max-width-narrow: 860px;
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-page);
  color: var(--text-main);
  overflow-x: hidden;
}

/* Links */
a {
  color: var(--cobalt-primary);
  text-decoration: none;
  transition: color 0.15s ease, border-color 0.15s ease;
}

a:hover {
  color: var(--cobalt-bright);
}

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

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.container-narrow {
  width: 100%;
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ==========================================================================
   Newspaper Editorial Typography & Labels
   ========================================================================== */

/* Serif Headlines */
h1, h2, h3, h4, .serif-headline {
  font-family: var(--font-serif);
  color: var(--text-main);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.015em;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.125rem; }

/* Narrow Uppercase-Style Section Labels (Kickers) */
.section-kicker,
.article-kicker,
.meta-label {
  font-family: var(--font-sans);
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  font-weight: 700;
  color: var(--cobalt-primary);
  display: inline-block;
  margin-bottom: 0.4rem;
}

.meta-label.dark {
  color: var(--text-main);
}

.dateline {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.byline {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-style: italic;
}

/* Fine Horizontal Rules */
.hr-hairline {
  height: 1px;
  background-color: var(--rule-hairline);
  border: none;
  margin: 1.5rem 0;
}

.hr-medium {
  height: 1px;
  background-color: var(--rule-medium);
  border: none;
  margin: 1.75rem 0;
}

.hr-strong {
  height: 2px;
  background-color: var(--rule-strong);
  border: none;
  margin: 2rem 0;
}

.hr-double {
  border: none;
  border-top: 3px double var(--rule-strong);
  margin: 0.75rem 0;
}

/* Drop Cap (首字下沉) */
.drop-cap::first-letter {
  float: left;
  font-family: var(--font-serif);
  font-size: 3.5rem;
  line-height: 0.85;
  padding-top: 4px;
  padding-right: 8px;
  padding-bottom: 2px;
  font-weight: 700;
  color: var(--cobalt-primary);
}

/* ==========================================================================
   Newspaper Masthead & Top Navigation
   ========================================================================== */

/* Top Utility Bar */
.newspaper-topbar {
  background-color: var(--bg-paper);
  border-bottom: 1px solid var(--rule-hairline);
  padding: 0.4rem 0;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.topbar-meta-left, .topbar-meta-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.network-live-status {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: var(--status-green-bg);
  color: var(--status-green);
  padding: 0.15rem 0.55rem;
  border-radius: 2px;
  border: 1px solid rgba(21, 128, 61, 0.2);
  font-weight: 600;
  font-size: 0.75rem;
}

.status-dot-pulse {
  width: 7px;
  height: 7px;
  background-color: var(--status-green);
  border-radius: 50%;
  display: inline-block;
}

/* Main Newspaper Masthead */
.newspaper-masthead {
  padding: 1.5rem 0 0.75rem 0;
  text-align: center;
  border-bottom: 1px solid var(--rule-strong);
}

.masthead-title-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.5rem;
}

.masthead-flag {
  font-family: var(--font-serif);
  font-size: 2.75rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--text-main);
  text-decoration: none;
  line-height: 1.1;
  text-transform: uppercase;
}

.masthead-flag span {
  color: var(--cobalt-primary);
}

.masthead-subtitle {
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-weight: 600;
  margin-top: 0.35rem;
}

.masthead-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-top: 1px solid var(--rule-hairline);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Editorial Navigation Bar */
.newspaper-nav-wrap {
  border-bottom: 2px solid var(--rule-strong);
  background-color: var(--bg-page);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: box-shadow 0.2s ease;
}

.newspaper-nav-wrap.scrolled {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.newspaper-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
}

.newspaper-nav-list {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.newspaper-nav-list li a {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 0.35rem 0;
  position: relative;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.newspaper-nav-list li a:hover,
.newspaper-nav-list li a.active {
  color: var(--cobalt-primary);
}

.newspaper-nav-list li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--cobalt-primary);
  transition: width 0.2s ease;
}

.newspaper-nav-list li a:hover::after,
.newspaper-nav-list li a.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Newspaper Buttons */
.btn-newspaper {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 1.15rem;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn-newspaper.solid-cobalt {
  background-color: var(--cobalt-primary);
  color: #ffffff;
  border: 1px solid var(--cobalt-primary);
}

.btn-newspaper.solid-cobalt:hover {
  background-color: var(--cobalt-bright);
  border-color: var(--cobalt-bright);
  color: #ffffff;
}

.btn-newspaper.outline-ink {
  background-color: transparent;
  color: var(--text-main);
  border: 1px solid var(--rule-strong);
}

.btn-newspaper.outline-ink:hover {
  background-color: var(--text-main);
  color: #ffffff;
}

.btn-newspaper.large {
  padding: 0.75rem 1.75rem;
  font-size: 0.95rem;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--rule-medium);
  padding: 0.35rem 0.6rem;
  border-radius: 2px;
  cursor: pointer;
  color: var(--text-main);
}

/* Editorial Ticker / Dispatch Bar */
.newspaper-ticker-bar {
  background-color: var(--bg-paper);
  border-bottom: 1px solid var(--rule-hairline);
  padding: 0.45rem 0;
  font-size: 0.8rem;
}

.ticker-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.ticker-badge {
  background-color: var(--cobalt-primary);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.15rem 0.45rem;
  border-radius: 1px;
}

.ticker-text {
  color: var(--text-secondary);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ==========================================================================
   Hero Section: Headline-Driven Front Page Lead Story
   ========================================================================== */
.frontpage-hero {
  padding: 2.25rem 0 2rem 0;
  border-bottom: 2px solid var(--rule-strong);
}

.hero-editorial-grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr;
  gap: 2.25rem;
  align-items: start;
}

/* Hero Lead Column */
.hero-lead-col {
  padding-right: 1.5rem;
  border-right: 1px solid var(--rule-hairline);
}

.hero-headline {
  font-size: 2.65rem;
  line-height: 1.18;
  margin: 0.4rem 0 0.85rem 0;
  color: var(--text-main);
}

.hero-deck {
  font-size: 1.15rem;
  line-height: 1.5;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 1.25rem;
  font-family: var(--font-sans);
}

.hero-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0;
  border-top: 1px solid var(--rule-hairline);
  border-bottom: 1px solid var(--rule-hairline);
  margin-bottom: 1.25rem;
  font-size: 0.8rem;
}

.hero-body-excerpt {
  font-size: 1.025rem;
  line-height: 1.75;
  color: var(--text-article);
  margin-bottom: 1.5rem;
}

.hero-body-excerpt p {
  margin-bottom: 1rem;
}

/* Editorial CTA Box */
.hero-cta-box {
  background-color: var(--bg-sidebar);
  border-left: 3px solid var(--cobalt-primary);
  border-top: 1px solid var(--rule-hairline);
  border-right: 1px solid var(--rule-hairline);
  border-bottom: 1px solid var(--rule-hairline);
  padding: 1.25rem;
  margin-top: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.hero-cta-info {
  flex: 1;
  min-width: 240px;
}

.hero-cta-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.25rem;
}

.hero-cta-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.hero-cta-buttons {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Hero Side Notes Column (Concise Side Notes) */
.hero-side-col {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sidebar-header {
  border-bottom: 1px solid var(--rule-strong);
  padding-bottom: 0.4rem;
  margin-bottom: 0.85rem;
}

.sidebar-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-main);
}

.side-note-item {
  padding-bottom: 1.15rem;
  border-bottom: 1px solid var(--rule-hairline);
}

.side-note-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.side-note-tag {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cobalt-primary);
  display: block;
  margin-bottom: 0.3rem;
}

.side-note-heading {
  font-family: var(--font-serif);
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-main);
  margin-bottom: 0.35rem;
}

.side-note-text {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Editorial Metric Badge */
.editorial-metric-box {
  background-color: var(--bg-paper);
  border: 1px solid var(--rule-hairline);
  padding: 0.85rem;
  text-align: center;
}

.metric-big-num {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--cobalt-primary);
  line-height: 1;
}

.metric-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-top: 0.35rem;
  font-weight: 600;
}

/* ==========================================================================
   Section: Featured-Story Layout for Product Advantages
   ========================================================================== */
.newspaper-section {
  padding: 3rem 0;
  border-bottom: 1px solid var(--rule-medium);
}

.newspaper-section.alt-bg {
  background-color: var(--bg-paper);
}

.section-editorial-header {
  border-bottom: 1px solid var(--rule-strong);
  padding-bottom: 0.75rem;
  margin-bottom: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 1rem;
}

.section-editorial-title {
  font-size: 1.85rem;
  color: var(--text-main);
  margin-top: 0.25rem;
}

.section-editorial-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  max-width: 580px;
}

/* Featured Story Main Grid */
.advantages-story-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

/* Lead Advantage Story */
.lead-advantage-article {
  padding-right: 1.5rem;
  border-right: 1px solid var(--rule-hairline);
}

.lead-advantage-headline {
  font-size: 1.75rem;
  line-height: 1.25;
  margin: 0.5rem 0 0.85rem 0;
}

.lead-advantage-text {
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--text-article);
  margin-bottom: 1.25rem;
}

/* Technical Infographic Diagram (CSS Pure Newspaper Graphic) */
.tech-diagram-container {
  background-color: var(--bg-sidebar);
  border: 1px solid var(--rule-hairline);
  padding: 1.25rem;
  margin: 1.5rem 0;
}

.diagram-caption {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid var(--rule-hairline);
  padding-bottom: 0.4rem;
}

.diagram-flow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin: 1.25rem 0;
  text-align: center;
}

.diagram-node {
  background: #ffffff;
  border: 1px solid var(--rule-strong);
  padding: 0.75rem 0.5rem;
  flex: 1;
  border-radius: 2px;
}

.diagram-node.highlight {
  border-color: var(--cobalt-primary);
  background-color: var(--cobalt-tag-bg);
}

.diagram-node-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-main);
  text-transform: uppercase;
}

.diagram-node-desc {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.diagram-arrow {
  color: var(--cobalt-primary);
  font-weight: 700;
  font-size: 0.9rem;
}

.diagram-footer-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-style: italic;
  margin-top: 0.75rem;
}

/* Secondary Advantage Column Stories */
.secondary-advantages-col {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.sub-advantage-story {
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--rule-hairline);
}

.sub-advantage-story:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.sub-advantage-headline {
  font-size: 1.25rem;
  line-height: 1.35;
  margin: 0.35rem 0 0.6rem 0;
}

.sub-advantage-text {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Editorial Callout Box (Margin Note) */
.editorial-callout {
  background-color: #ffffff;
  border-left: 3px solid var(--cobalt-primary);
  border-top: 1px solid var(--rule-hairline);
  border-right: 1px solid var(--rule-hairline);
  border-bottom: 1px solid var(--rule-hairline);
  padding: 1rem;
  margin: 1rem 0;
  font-size: 0.84rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

.editorial-callout strong {
  color: var(--cobalt-primary);
  font-weight: 700;
}

/* ==========================================================================
   Section: Global Nodes & Network Dispatch (电讯与全球节点)
   ========================================================================== */
.nodes-editorial-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.node-dispatch-card {
  background: #ffffff;
  border: 1px solid var(--rule-hairline);
  border-top: 2px solid var(--rule-strong);
  padding: 1.25rem 1rem;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.node-dispatch-card:hover {
  border-top-color: var(--cobalt-primary);
}

.node-card-kicker {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--cobalt-primary);
}

.node-city-title {
  font-size: 1.15rem;
  margin: 0.3rem 0 0.5rem 0;
  color: var(--text-main);
}

.node-latency-stat {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--status-green);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 0.6rem;
}

.node-desc-text {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   Section: AI & 4K Streaming Scenarios (流媒体与 AI 专栏)
   ========================================================================== */
.ai-stream-newspaper-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 1.5rem;
}

.scenario-editorial-card {
  background: #ffffff;
  border: 1px solid var(--rule-hairline);
  padding: 1.5rem;
  border-top: 3px solid var(--rule-strong);
}

.scenario-editorial-card.ai-card {
  border-top-color: var(--cobalt-primary);
}

.scenario-editorial-card.stream-card {
  border-top-color: var(--text-main);
}

.scenario-card-headline {
  font-size: 1.45rem;
  margin: 0.4rem 0 0.75rem 0;
}

.scenario-card-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.service-badges-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.service-badge {
  background: var(--bg-paper);
  border: 1px solid var(--rule-hairline);
  padding: 0.3rem 0.65rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-main);
  border-radius: 2px;
}

/* ==========================================================================
   Section: Buyer's Guide & Plan Comparison Section (选购导购专栏)
   Reads like Consumer Reports / Financial Times Buyer's Guide
   ========================================================================== */
.buyers-guide-intro {
  margin-bottom: 2rem;
}

.guide-banner-box {
  background-color: var(--bg-paper);
  border-left: 4px solid var(--cobalt-primary);
  border-top: 1px solid var(--rule-hairline);
  border-right: 1px solid var(--rule-hairline);
  border-bottom: 1px solid var(--rule-hairline);
  padding: 1.25rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.guide-banner-text {
  font-size: 0.95rem;
  color: var(--text-article);
  max-width: 800px;
  line-height: 1.6;
}

/* Buyer's Guide Table */
.buyers-guide-table-wrap {
  overflow-x: auto;
  margin: 2rem 0;
  border: 1px solid var(--rule-strong);
  background: #ffffff;
}

.buyers-guide-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

.buyers-guide-table th,
.buyers-guide-table td {
  padding: 1.15rem 1.25rem;
  border-bottom: 1px solid var(--rule-hairline);
  border-right: 1px solid var(--rule-hairline);
  vertical-align: middle;
}

.buyers-guide-table th:last-child,
.buyers-guide-table td:last-child {
  border-right: none;
}

.buyers-guide-table thead th {
  background-color: var(--bg-paper);
  border-bottom: 2px solid var(--rule-strong);
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
}

.buyers-guide-table thead th.col-feature {
  width: 22%;
  background-color: #ffffff;
}

.buyers-guide-table thead th.featured-col {
  background-color: var(--cobalt-tag-bg);
  border-top: 3px solid var(--cobalt-primary);
}

.plan-table-badge {
  display: inline-block;
  background-color: var(--cobalt-primary);
  color: #ffffff;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.15rem 0.5rem;
  border-radius: 1px;
  margin-bottom: 0.35rem;
}

.plan-table-price {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
}

.plan-table-price span {
  font-size: 0.8rem;
  font-family: var(--font-sans);
  font-weight: normal;
  color: var(--text-muted);
}

.buyers-guide-table tbody tr:hover {
  background-color: var(--bg-paper);
}

.buyers-guide-table tbody tr.verdict-row {
  background-color: var(--bg-sidebar);
}

.buyers-guide-table td.featured-cell {
  background-color: rgba(239, 246, 255, 0.4);
  font-weight: 600;
}

/* Buyer's Guide Mobile Cards (Visible on smaller screens) */
.buyers-guide-cards-mobile {
  display: none;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.plan-mobile-card {
  border: 1px solid var(--rule-strong);
  background: #ffffff;
  padding: 1.5rem;
}

.plan-mobile-card.featured {
  border: 2px solid var(--cobalt-primary);
  box-shadow: 0 4px 16px rgba(30, 64, 175, 0.08);
}

/* ==========================================================================
   Section: SEO Blog Articles (Front Page Newsroom Index)
   ========================================================================== */
.newspaper-articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

.newsroom-article-card {
  display: flex;
  flex-direction: column;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--rule-hairline);
}

.newsroom-article-card:nth-child(3n) {
  /* column balance */
}

.article-category-kicker {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cobalt-primary);
  margin-bottom: 0.35rem;
}

.newsroom-headline {
  font-size: 1.22rem;
  line-height: 1.35;
  margin-bottom: 0.6rem;
}

.newsroom-headline a {
  color: var(--text-main);
}

.newsroom-headline a:hover {
  color: var(--cobalt-primary);
}

.newsroom-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0.75rem;
  flex-grow: 1;
}

.newsroom-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  border-top: 1px solid var(--rule-hairline);
  padding-top: 0.5rem;
  display: flex;
  justify-content: space-between;
}

/* ==========================================================================
   Section: Objective Network Lab Benchmarks (NO MADE-UP REVIEWS)
   ========================================================================== */
.benchmarks-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin: 1.75rem 0;
}

.benchmark-card {
  background: #ffffff;
  border: 1px solid var(--rule-hairline);
  border-top: 3px solid var(--cobalt-primary);
  padding: 1.25rem;
}

.benchmark-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--text-muted);
}

.benchmark-val {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 0.35rem 0 0.2rem 0;
}

.benchmark-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   Section: Editorial FAQ (答读者问 · 常见疑问与技术解答)
   ========================================================================== */
.faq-newspaper-container {
  max-width: 900px;
  margin: 0 auto;
}

.faq-newspaper-item {
  border-bottom: 1px solid var(--rule-hairline);
}

.faq-newspaper-item:first-child {
  border-top: 1px solid var(--rule-hairline);
}

.faq-question-btn {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 1.25rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
}

.faq-question-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.35;
}

.faq-question-btn:hover .faq-question-title {
  color: var(--cobalt-primary);
}

.faq-icon {
  font-size: 1.25rem;
  color: var(--cobalt-primary);
  font-weight: 300;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.faq-newspaper-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer-pane {
  display: none;
  padding-bottom: 1.5rem;
  font-size: 0.94rem;
  color: var(--text-article);
  line-height: 1.7;
}

.faq-newspaper-item.open .faq-answer-pane {
  display: block;
}

/* ==========================================================================
   Single Article & Sub-page Layouts (关于我们/条款/隐私/博客正文)
   ========================================================================== */
.article-header-newspaper {
  padding: 2.5rem 0 1.5rem 0;
  border-bottom: 1px solid var(--rule-strong);
  margin-bottom: 2rem;
}

.article-header-newspaper h1 {
  font-size: 2.5rem;
  line-height: 1.2;
  margin: 0.5rem 0 1rem 0;
}

.breadcrumb-nav {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
}

.breadcrumb-nav a {
  color: var(--text-secondary);
}

.breadcrumb-nav a:hover {
  color: var(--cobalt-primary);
}

.newspaper-prose {
  font-size: 1.025rem;
  line-height: 1.8;
  color: var(--text-article);
  max-width: 820px;
  margin: 0 auto;
}

.newspaper-prose p {
  margin-bottom: 1.4rem;
}

.newspaper-prose h2 {
  font-size: 1.65rem;
  margin: 2.25rem 0 1rem 0;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--rule-hairline);
  color: var(--text-main);
}

.newspaper-prose h3 {
  font-size: 1.3rem;
  margin: 1.75rem 0 0.75rem 0;
  color: var(--text-main);
}

.newspaper-prose ul,
.newspaper-prose ol {
  margin: 1.25rem 0 1.5rem 1.5rem;
}

.newspaper-prose li {
  margin-bottom: 0.6rem;
}

.newspaper-prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  border: 1px solid var(--rule-strong);
}

.newspaper-prose th,
.newspaper-prose td {
  padding: 0.85rem 1rem;
  border: 1px solid var(--rule-hairline);
}

.newspaper-prose thead th {
  background-color: var(--bg-paper);
  border-bottom: 2px solid var(--rule-strong);
  font-family: var(--font-serif);
  font-weight: 700;
}

/* ==========================================================================
   Newspaper Colophon & Footer
   ========================================================================== */
.newspaper-footer {
  background-color: var(--bg-paper);
  border-top: 3px double var(--rule-strong);
  padding: 3.5rem 0 2rem 0;
  margin-top: 4rem;
}

.footer-colophon-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--rule-hairline);
}

.footer-brand-col p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 0.85rem 0;
  max-width: 380px;
}

.footer-col-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-main);
  border-bottom: 1px solid var(--rule-strong);
  padding-bottom: 0.4rem;
  margin-bottom: 1rem;
}

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

.footer-nav-links li a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color 0.15s ease;
}

.footer-nav-links li a:hover {
  color: var(--cobalt-primary);
}

.footer-partner-strip {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--rule-hairline);
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.footer-partner-strip a {
  color: var(--text-secondary);
  font-weight: 600;
}

.footer-partner-strip a:hover {
  color: var(--cobalt-primary);
}

.footer-bottom-legal {
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.78rem;
  color: var(--text-muted);
.related-articles {
  background-color: var(--bg-paper);
  border-top: 2px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule-hairline);
  padding: 1.5rem;
  margin-top: 2.5rem;
}

.related-articles h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--text-main);
  margin-bottom: 0.75rem;
}

.related-articles ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.related-articles li a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--cobalt-primary);
}

.related-articles li a:hover {
  text-decoration: underline;
  color: var(--cobalt-bright);
}

/* ==========================================================================
   Responsive Breakpoints
   Mobile First, Optimized for 375px, 390px, 430px, 768px, 1024px, 1440px
   ========================================================================== */

@media (max-width: 1024px) {
  .hero-editorial-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .hero-lead-col {
    padding-right: 0;
    border-right: none;
    border-bottom: 1px solid var(--rule-hairline);
    padding-bottom: 2rem;
  }
  
  .advantages-story-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .lead-advantage-article {
    padding-right: 0;
    border-right: none;
    border-bottom: 1px solid var(--rule-hairline);
    padding-bottom: 2rem;
  }

  .nodes-editorial-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .newspaper-articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .benchmarks-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-colophon-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  h1, .hero-headline { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.2rem; }

  .masthead-flag {
    font-size: 1.9rem;
  }

  .topbar-meta-left, .topbar-meta-right {
    font-size: 0.72rem;
    gap: 0.75rem;
  }

  /* Show mobile hamburger */
  .mobile-nav-toggle {
    display: inline-flex;
  }

  .newspaper-nav-list {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 0;
    gap: 0.75rem;
    border-top: 1px solid var(--rule-hairline);
  }

  .newspaper-nav-list.mobile-active {
    display: flex;
  }

  .newspaper-nav-inner {
    flex-wrap: wrap;
  }

  .nav-actions {
    display: none;
  }

  .ai-stream-newspaper-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .newspaper-articles-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .nodes-editorial-grid {
    grid-template-columns: 1fr;
  }

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

  /* Buyer's guide table on mobile: replace with clean comparison cards */
  .buyers-guide-table-wrap {
    display: none;
  }

  .buyers-guide-cards-mobile {
    display: flex;
  }

  .footer-colophon-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .hero-cta-box {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-newspaper {
    width: 100%;
  }
}