/* ==========================================================================
   JIFENGYUN - PREMIUM EDITORIAL NETWORK DESIGN SYSTEM
   Theme: Premium Business · Modern Editorial · Technology Brand · Clean Commerce
   ========================================================================== */

:root {
  /* Color Palette */
  --bg-white: #FFFFFF;
  --bg-page: #F8F8F5;
  --bg-subtle: #F2F3F0;
  --bg-card: #FFFFFF;
  --bg-blue-light: #EEF4FF;
  --bg-green-light: #ECF8F3;
  --bg-dark-band: #152A38;
  
  /* Text Colors */
  --text-primary: #111827;
  --text-body: #475467;
  --text-secondary: #7C8490;
  --text-muted: #98A2B3;
  --text-inverse: #FFFFFF;
  --text-inverse-muted: #D0D5DD;
  
  /* Brand Accents */
  --brand-blue: #3366FF;
  --brand-blue-hover: #254EDB;
  --emerald-green: #26A17B;
  --border-light: #E4E7EC;
  --border-subtle: #ECEEF2;
  
  /* Layout Dimensions */
  --container-max: 1240px;
  --container-narrow: 840px;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  
  /* Borders & Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* Transitions */
  --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-white);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  background-color: var(--bg-white);
  color: var(--text-primary);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

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

ul, ol {
  list-style: none;
}

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

/* ==========================================================================
   CONTAINER & LAYOUT
   ========================================================================== */

.editorial-container {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 28px;
  padding-right: 28px;
}

.editorial-section {
  padding-top: 84px;
  padding-bottom: 84px;
  border-bottom: 1px solid var(--border-light);
  position: relative;
}

/* ==========================================================================
   HOMEPAGE SECTION BACKGROUND RHYTHM
   Continuous Soft Palette: White -> Soft Off-White -> White -> Soft Gray -> White...
   ========================================================================== */

#home {
  background-color: #FFFFFF;
}

#features {
  background-color: #F8F8F5;
}

#regions {
  background-color: #FFFFFF;
}

#ai-media {
  background-color: #F6F8F7;
}

#plans {
  background-color: #FFFFFF;
}

#blog {
  background-color: #F8F8F5;
}

#reviews {
  background-color: #FFFFFF;
}

#faq {
  background-color: #FFFFFF;
}

/* Section Header Meta */
.section-meta-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 40px;
  align-items: baseline;
  margin-bottom: 48px;
}

.section-num-tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--brand-blue);
  letter-spacing: 0.1em;
}

.section-h2-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.25;
}

.section-lead-text {
  font-size: 1.05rem;
  color: var(--text-body);
  margin-top: 10px;
  max-width: 720px;
}

/* ==========================================================================
   DOUBLE LAYER EDITORIAL HEADER
   Layer 1: Utility Bar · Layer 2: Main Header
   ========================================================================== */

.editorial-site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid var(--border-light);
}

/* Layer 1: Utility Bar */
.utility-bar {
  background: var(--bg-page);
  border-bottom: 1px solid var(--border-light);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.utility-bar-inner {
  height: 36px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.utility-left-text {
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}

.utility-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--emerald-green);
}

.utility-right-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

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

/* Layer 2: Main Header */
.main-header-bar {
  height: 68px;
}

.main-header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand-editorial-group {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.brand-main-name {
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.brand-sub-latin {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
}

.editorial-nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-body);
}

.editorial-nav-links a:hover {
  color: var(--brand-blue);
}

.editorial-header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-plan-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-body);
}

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

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--brand-blue);
  color: var(--text-inverse);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-cta-btn:hover {
  background-color: var(--brand-blue-hover);
}

/* Mobile Menu Toggle */
.mobile-menu-trigger {
  display: none;
  background: transparent;
  border: 1px solid var(--border-light);
  padding: 6px 12px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.mobile-nav-panel {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-light);
  padding: 24px;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.06);
}

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

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.mobile-nav-list a {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-cta-wrapper {
  margin-top: 18px;
}

.mobile-cta-wrapper .nav-cta-btn {
  display: block;
  text-align: center;
  padding: 12px;
}

/* ==========================================================================
   EDITORIAL COVER HERO
   Height: 650px–760px · Left Aligned · 3-Area Composition · Network Ribbon
   ========================================================================== */

.hero-editorial-cover {
  padding-top: 28px;
  padding-bottom: 48px;
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-light);
}

.hero-eyebrow-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--brand-blue);
  letter-spacing: 0.15em;
  margin-bottom: 20px;
}

.hero-editorial-h1 {
  font-size: clamp(2.4rem, 5.2vw, 4.2rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text-primary);
  max-width: 82%;
  margin-bottom: 36px;
}

.hero-editorial-composition {
  display: grid;
  grid-template-columns: 46% 22% 32%;
  gap: 40px;
  align-items: start;
  padding-top: 32px;
  border-top: 1px solid var(--border-light);
  margin-bottom: 40px;
}

.hero-intro-col p {
  font-size: 1.05rem;
  color: var(--text-body);
  line-height: 1.75;
}

.hero-specs-col {
  display: flex;
  flex-direction: column;
  gap: 20px;
  font-size: 0.88rem;
}

.spec-unit-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.spec-unit-val {
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.5;
}

.hero-actions-col {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: flex-start;
}

.hero-primary-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--brand-blue);
  color: var(--text-inverse);
  font-weight: 700;
  font-size: 1rem;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(51, 102, 255, 0.2);
}

.hero-primary-cta:hover {
  background-color: var(--brand-blue-hover);
  transform: translateY(-1px);
}

.hero-secondary-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.92rem;
  color: var(--text-body);
}

.hero-secondary-actions a:hover {
  color: var(--brand-blue);
  text-decoration: underline;
}

/* Horizontal Network Ribbon */
.hero-network-ribbon {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 16px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.ribbon-label {
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.1em;
}

.ribbon-nodes-line {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.ribbon-node {
  font-weight: 700;
  color: var(--text-primary);
}

.ribbon-divider {
  color: var(--border-light);
  font-weight: 300;
}

/* ==========================================================================
   01. EDITORIAL MOSAIC (WHY JIFENGYUN)
   Different Dimensions · No 4 Identical Cards
   ========================================================================== */

.editorial-mosaic-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.mosaic-box {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 36px;
  transition: var(--transition);
}

.mosaic-box:hover {
  border-color: #D0D5DD;
}

.mosaic-full-width {
  grid-column: 1 / -1;
}

.mosaic-meta-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--brand-blue);
  margin-bottom: 12px;
}

.mosaic-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.mosaic-desc {
  font-size: 1rem;
  color: var(--text-body);
  line-height: 1.7;
  max-width: 680px;
  margin-bottom: 24px;
}

.mosaic-node-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.mosaic-node-pill {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}

.mosaic-link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--brand-blue);
}

.mosaic-link-arrow:hover {
  text-decoration: underline;
}

.device-editorial-list,
.ai-editorial-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.editorial-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.95rem;
}

.editorial-list-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.list-item-name {
  font-weight: 700;
  color: var(--text-primary);
}

.list-item-sub {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.streaming-typography-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 28px 48px;
  margin-top: 16px;
}

.stream-brand-unit {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.stream-brand-unit span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--emerald-green);
  letter-spacing: 0.05em;
  margin-top: 2px;
}

/* ==========================================================================
   02. REGION EDITORIAL LIST (GLOBAL REGIONS)
   Full-Width Rows · Large Typography · Hover Slide
   ========================================================================== */

.region-editorial-rows {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border-light);
}

.region-row-entry {
  display: grid;
  grid-template-columns: 240px 1fr 140px;
  gap: 32px;
  align-items: center;
  padding: 32px 16px;
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.region-row-entry:hover {
  background: var(--bg-page);
  padding-left: 24px;
}

.region-name-col h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.region-cities-col {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  font-size: 1.05rem;
  color: var(--text-body);
}

.region-cities-col span {
  position: relative;
}

.region-cities-col span::after {
  content: "/";
  margin-left: 14px;
  color: var(--border-light);
}

.region-cities-col span:last-child::after {
  content: "";
}

.region-count-col {
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--brand-blue);
  letter-spacing: 0.08em;
}

/* ==========================================================================
   03. LIGHT EDITORIAL FEATURE SECTION (AI + STREAMING)
   Background: #F6F8F7 · Clean Business Editorial · Open 3-Column Layout
   ========================================================================== */

.editorial-ai-streaming {
  background-color: #F6F8F7;
  padding-top: 84px;
  padding-bottom: 84px;
  border-bottom: 1px solid var(--border-light);
  border-top: 1px solid var(--border-light);
}

.ai-streaming-header-split {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 56px;
  align-items: end;
  margin-bottom: 56px;
}

.ai-streaming-huge-h2 {
  font-size: clamp(2.1rem, 3.8vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 18px;
  color: var(--text-primary);
}

.ai-streaming-lead-p {
  font-size: 1.05rem;
  color: var(--text-body);
  line-height: 1.75;
  max-width: 600px;
}

.ai-streaming-capability-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ai-capability-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: var(--transition);
}

.ai-capability-card:hover {
  border-color: var(--brand-blue);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.capability-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.capability-card-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--brand-blue);
}

.capability-card-title {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-primary);
}

.capability-card-items {
  font-size: 0.88rem;
  color: var(--text-body);
  font-weight: 500;
}

/* Open 3-Column Editorial Layout */
.open-editorial-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border-light);
}

.editorial-col-panel {
  display: flex;
  flex-direction: column;
}

.col-panel-header {
  padding-bottom: 14px;
  border-bottom: 2px solid var(--text-primary);
  margin-bottom: 16px;
}

.col-panel-num-tag {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--brand-blue);
  margin-bottom: 4px;
}

.col-panel-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.col-panel-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
  min-height: 42px;
}

.col-panel-items-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.col-panel-item-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 14px;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.col-panel-item-row:hover {
  border-color: #CBD5E1;
  background: #FAFAF8;
  transform: translateX(2px);
}

.item-brand-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.item-status-note {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.ai-streaming-footer-row {
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.ai-streaming-footer-lead {
  font-size: 0.95rem;
  color: var(--text-body);
}

.ai-streaming-footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.editorial-text-link {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--brand-blue);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.editorial-text-link:hover {
  text-decoration: underline;
}

/* ==========================================================================
   04. EDITORIAL PRICE LIST
   Full-Width Rows · High-End Product Catalog Feel
   ========================================================================== */

.editorial-price-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border-light);
}

.price-row-item {
  display: grid;
  grid-template-columns: 240px 160px 1fr 180px;
  align-items: center;
  gap: 32px;
  padding: 36px 20px;
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
  position: relative;
}

.price-row-item:hover {
  background: var(--bg-page);
}

.price-row-item.is-recommended {
  border-left: 4px solid var(--brand-blue);
  background: var(--bg-page);
}

.plan-name-box h3 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
}

.plan-traffic-tag {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-secondary);
  margin-top: 4px;
}

.plan-cost-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.plan-amount {
  font-size: 2rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
}

.is-recommended .plan-amount {
  color: var(--brand-blue);
}

.plan-period {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.plan-scenario-desc {
  font-size: 0.98rem;
  color: var(--text-body);
  line-height: 1.6;
}

.plan-badge-rec {
  display: inline-block;
  background: var(--bg-blue-light);
  color: var(--brand-blue);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
  letter-spacing: 0.08em;
}

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

.plan-select-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--brand-blue);
}

.plan-select-link:hover {
  text-decoration: underline;
}

.plan-primary-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--brand-blue);
  color: var(--text-inverse);
  font-size: 0.92rem;
  font-weight: 700;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.plan-primary-cta-btn:hover {
  background: var(--brand-blue-hover);
}

/* ==========================================================================
   05. MAGAZINE EDITORIAL LAYOUT (BLOG)
   1 Large (60%) + 4 Medium (40%) + 4 Small (Horizontal Row)
   ========================================================================== */

.magazine-blog-layout {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.magazine-top-split {
  display: grid;
  grid-template-columns: 58% 38%;
  gap: 4%;
  align-items: start;
}

/* 1 Featured Large Article */
.featured-article-card {
  display: flex;
  flex-direction: column;
}

.featured-img-wrap {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 24px;
  border: 1px solid var(--border-light);
}

.article-category-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--brand-blue);
  margin-bottom: 8px;
}

.featured-article-title {
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1.35;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.featured-article-title a:hover {
  color: var(--brand-blue);
}

.featured-article-summary {
  font-size: 1.05rem;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 18px;
}

.article-meta-inline {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 4 Medium Articles (Vertical List) */
.medium-articles-vertical {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.medium-article-row {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-light);
}

.medium-article-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.medium-article-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.medium-article-title a:hover {
  color: var(--brand-blue);
}

.medium-article-summary {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.6;
  margin-bottom: 8px;
}

/* 4 Small Articles (Horizontal 4-Col Row) */
.small-articles-horizontal-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding-top: 36px;
  border-top: 1px solid var(--border-light);
}

.small-article-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.small-article-title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text-primary);
}

.small-article-title a:hover {
  color: var(--brand-blue);
}

.small-article-desc {
  font-size: 0.86rem;
  color: var(--text-body);
  line-height: 1.6;
}

/* ==========================================================================
   06. READER NOTES
   3 Short Notes · Large Quotation Marks · Pure Text
   ========================================================================== */

.reader-notes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.reader-note-item {
  background: var(--bg-page);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px;
}

.reader-note-idx {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--brand-blue);
  margin-bottom: 12px;
}

.reader-quote-mark {
  font-size: 3rem;
  font-weight: 900;
  color: #D0D5DD;
  line-height: 1;
  margin-bottom: 8px;
  font-family: serif;
}

.reader-note-text {
  font-size: 1.02rem;
  color: var(--text-body);
  line-height: 1.7;
}

/* ==========================================================================
   07. LARGE EDITORIAL ACCORDION (FAQ)
   Clean 1-Question Per Row · Left Header + Right Accordion
   ========================================================================== */

.editorial-faq-wrapper {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: start;
}

.editorial-faq-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border-light);
}

.editorial-faq-row {
  border-bottom: 1px solid var(--border-light);
}

.faq-toggle-btn {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
}

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

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

.faq-toggle-btn[aria-expanded="true"] .faq-toggle-icon {
  transform: rotate(45deg);
  color: var(--brand-blue);
}

.faq-answer-collapse {
  padding-bottom: 24px;
  font-size: 1rem;
  color: var(--text-body);
  line-height: 1.75;
}

/* ==========================================================================
   08. EDITORIAL FOOTER
   Huge Brand Typography + Horizontal Navigation Links
   ========================================================================== */

.editorial-footer {
  background-color: var(--bg-white);
  border-top: 1px solid var(--border-light);
  padding-top: 72px;
  padding-bottom: 48px;
}

.footer-top-brand-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 36px;
  margin-bottom: 40px;
}

.footer-massive-name {
  font-size: clamp(3rem, 8vw, 6.8rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 0.95;
  color: var(--text-primary);
}

.footer-brand-sub {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: 0.12em;
  text-align: right;
}

.footer-nav-columns {
  display: grid;
  grid-template-columns: 200px 1fr 1fr 200px;
  gap: 36px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border-light);
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.95rem;
}

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

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

.footer-cta-col {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.footer-bottom-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  padding-top: 28px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

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

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

.footer-external-links a:hover {
  color: var(--brand-blue);
}

/* ==========================================================================
   ARTICLE & CATEGORY ARCHIVE TEMPLATES
   Magazine Layout · Quick Answer · TOC · Breadcrumbs
   ========================================================================== */

.editorial-doc-banner {
  background: var(--bg-page);
  border-bottom: 1px solid var(--border-light);
  padding: 56px 0 40px;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

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

.doc-tag-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--brand-blue);
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.editorial-article-h1 {
  font-size: clamp(1.9rem, 3.8vw, 2.7rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.editorial-lead-p {
  font-size: 1.15rem;
  color: var(--text-body);
  line-height: 1.75;
  max-width: 820px;
}

/* Article Body Grid */
.editorial-article-body-grid {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 56px;
  padding: 56px 0;
  align-items: start;
}

.article-main-prose {
  max-width: 820px;
}

/* GEO Quick Answer Box */
.quick-answer {
  background: var(--bg-blue-light);
  border-left: 4px solid var(--brand-blue);
  padding: 24px 28px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: 40px;
}

.quick-answer h2 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.quick-answer p {
  font-size: 1.05rem;
  color: var(--text-body);
  line-height: 1.75;
}

/* Sticky TOC Index */
.article-toc-sidebar {
  position: sticky;
  top: 100px;
  background: var(--bg-page);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
}

.toc-header-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.1em;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 14px;
}

.toc-nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.88rem;
}

.toc-nav-list a {
  color: var(--text-body);
}

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

/* Article Prose Typography */
.article-main-prose h2 {
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin: 48px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
}

.article-main-prose h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 32px 0 12px;
}

.article-main-prose p {
  font-size: 1.05rem;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 22px;
}

.article-main-prose ul,
.article-main-prose ol {
  margin: 16px 0 24px 24px;
}

.article-main-prose ul li {
  list-style-type: disc;
  font-size: 1.02rem;
  color: var(--text-body);
  line-height: 1.75;
  margin-bottom: 8px;
}

.article-main-prose ol li {
  list-style-type: decimal;
  font-size: 1.02rem;
  color: var(--text-body);
  line-height: 1.75;
  margin-bottom: 8px;
}

.article-main-prose figure {
  margin: 36px 0;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-page);
  padding: 12px;
}

.article-main-prose figure figcaption {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-align: center;
  margin-top: 10px;
}

.article-main-prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 32px 0;
  border: 1px solid var(--border-light);
}

.article-main-prose th,
.article-main-prose td {
  padding: 12px 16px;
  border: 1px solid var(--border-light);
  font-size: 0.95rem;
  text-align: left;
}

.article-main-prose th {
  background: var(--bg-page);
  font-weight: 700;
  color: var(--text-primary);
}

.article-editorial-author {
  margin-top: 48px;
  padding: 24px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--bg-page);
}

.author-mark {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--brand-blue);
  color: var(--text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.1rem;
}

.author-meta-info h4 {
  font-size: 1rem;
  font-weight: 700;
}

.author-meta-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* Category Archive Specific */
.archive-intro-box {
  background: var(--bg-page);
  border-bottom: 1px solid var(--border-light);
  padding: 56px 0 40px;
}

.archive-article-row {
  display: grid;
  grid-template-columns: 140px 1fr 140px;
  gap: 28px;
  padding: 28px 12px;
  border-bottom: 1px solid var(--border-light);
  align-items: baseline;
  transition: var(--transition);
}

.archive-article-row:hover {
  background: var(--bg-page);
}

/* Institutional Policy Pages */
.policy-content-wrap {
  padding: 56px 0;
  max-width: 860px;
}

.policy-block {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

.policy-block h2 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.policy-block p {
  font-size: 1.02rem;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 12px;
}

/* Sitemap Directory Grid */
.sitemap-editorial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  margin-top: 36px;
}

.sitemap-group-box {
  background: var(--bg-page);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px;
}

.sitemap-group-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 16px;
}

.sitemap-links-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.95rem;
}

.sitemap-links-col a {
  color: var(--text-body);
}

.sitemap-links-col a:hover {
  color: var(--brand-blue);
  text-decoration: underline;
}

/* 404 Error */
.error-editorial-box {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
}

.error-giant-num {
  font-size: 6rem;
  font-weight: 900;
  color: var(--brand-blue);
  line-height: 1;
  margin-bottom: 16px;
}

.error-main-h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.error-nav-btns {
  display: flex;
  gap: 16px;
  margin-top: 24px;
}

/* ==========================================================================
   RESPONSIVE DESIGN (375px, 390px, 430px, 768px, 1024px)
   ========================================================================== */

@media (max-width: 1024px) {
  .hero-editorial-h1 {
    max-width: 100%;
  }

  .hero-editorial-composition {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .magazine-top-split {
    grid-template-columns: 1fr;
    gap: 36px;
  }

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

  .ai-streaming-header-split {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .open-editorial-columns {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .price-row-item {
    grid-template-columns: 1fr 140px;
    gap: 16px;
  }

  .plan-scenario-desc {
    grid-column: 1 / -1;
  }

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

  .article-toc-sidebar {
    display: none;
  }

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

@media (max-width: 768px) {
  .utility-bar {
    display: none;
  }

  .editorial-nav-links {
    display: none;
  }

  .editorial-header-actions .nav-plan-link {
    display: none;
  }

  .mobile-menu-trigger {
    display: block;
  }

  .editorial-section {
    padding-top: 56px;
    padding-bottom: 56px;
  }

  .section-meta-row {
    grid-template-columns: 1fr;
    gap: 8px;
    margin-bottom: 32px;
  }

  .hero-editorial-cover {
    padding-top: 36px;
    padding-bottom: 40px;
  }

  .hero-editorial-h1 {
    font-size: 2.1rem;
    margin-bottom: 24px;
  }

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

  .region-row-entry {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .reader-notes-grid {
    grid-template-columns: 1fr;
  }

  .small-articles-horizontal-row {
    grid-template-columns: 1fr;
  }

  .price-row-item {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .plan-action-box {
    text-align: left;
  }

  .footer-nav-columns {
    grid-template-columns: 1fr 1fr;
  }

  .footer-cta-col {
    grid-column: 1 / -1;
    align-items: flex-start;
  }

  .archive-article-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (max-width: 480px) {
  .editorial-container {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero-editorial-h1 {
    font-size: 1.85rem;
  }

  .hero-network-ribbon {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .footer-nav-columns {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   PREFERS-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;
  }
}