/* ==========================================================================
   FASTLINK · 远行志 (fastlinkbgp.mom)
   Theme: Kinfolk / Monocle Editorial Magazine & Tactile Route Passports
   Palette:
     - Warm Parchment:   #FAF6F0
     - Linen Surface:    #F3ECE1
     - Pure Paper:       #FFFDF9
     - Deep Espresso:    #1E1B18
     - Charcoal Muted:   #5A534A
     - Hairline Rule:    #D8CFC2
     - Terracotta Seal:  #C85A32
     - Sage Botanical:   #5B7562
     - Warm Brass:       #D4A359
   ========================================================================== */

:root {
  --bg-parchment: #FAF6F0;
  --bg-linen: #F3ECE1;
  --bg-paper: #FFFDF9;
  --bg-espresso: #1E1B18;
  --ink-primary: #1E1B18;
  --ink-secondary: #4A443C;
  --ink-muted: #766E64;
  --rule-light: #D8CFC2;
  --rule-dark: #1E1B18;
  --terracotta: #C85A32;
  --terracotta-dark: #A64421;
  --terracotta-soft: #F7E6DF;
  --sage: #5B7562;
  --sage-soft: #E5EFE8;
  --brass: #D4A359;
  --brass-soft: #F9F1E1;

  --font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --container-max: 1260px;
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-editorial: 0 14px 36px rgba(30, 27, 24, 0.08);
  --shadow-passport: 0 20px 44px rgba(30, 27, 24, 0.14);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-parchment);
  color: var(--ink-primary);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background-color: var(--bg-parchment);
  background-image:
    radial-gradient(rgba(30, 27, 24, 0.03) 1px, transparent 0),
    linear-gradient(180deg, rgba(255, 253, 249, 0.5) 0%, rgba(243, 236, 225, 0.35) 100%);
  background-size: 24px 24px, 100% 100%;
  color: var(--ink-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

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

.layout-container {
  width: min(var(--container-max), calc(100% - 2.5rem));
  margin-inline: auto;
}

/* ==========================================================================
   1. EDITORIAL DUAL-DECK MASTHEAD (NAVIGATION)
   ========================================================================== */

.editorial-masthead {
  position: sticky;
  top: 0;
  z-index: 120;
  background: rgba(250, 246, 240, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--rule-dark);
}

.masthead-ticker {
  background: var(--bg-espresso);
  color: #F4EDE2;
  font-size: 0.78rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  padding: 0.38rem 0;
}

.masthead-ticker__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.masthead-ticker__vol {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--brass);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.masthead-ticker__vol::before {
  content: "§";
  color: var(--terracotta);
  font-family: var(--font-serif);
  font-size: 0.95rem;
}

.masthead-ticker__live {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  color: #E8E0D5;
}

.live-pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #76B089;
  box-shadow: 0 0 0 3px rgba(118, 176, 137, 0.25);
  animation: editorialPulse 2.4s infinite ease-in-out;
}

@keyframes editorialPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.25); opacity: 0.65; }
}

.masthead-ticker__guide-link {
  color: var(--brass);
  font-weight: 600;
  letter-spacing: 0.02em;
  border-bottom: 1px dotted rgba(212, 163, 89, 0.6);
}

.masthead-ticker__guide-link:hover {
  color: #FFFDF9;
  border-bottom-color: #FFFDF9;
}

.masthead-main {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--rule-light);
}

.masthead-main__grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1.5rem;
}

.masthead-nav-group {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.masthead-nav-group--right {
  justify-content: flex-end;
}

.masthead-nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-secondary);
  display: inline-flex;
  align-items: baseline;
  gap: 0.3rem;
  position: relative;
  padding: 0.2rem 0;
}

.masthead-nav-link .chap-num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--terracotta);
  font-weight: 700;
}

.masthead-nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1.5px;
  background: var(--terracotta);
  transition: width 0.25s ease;
}

.masthead-nav-link:hover,
.masthead-nav-link[aria-current="page"] {
  color: var(--ink-primary);
}

.masthead-nav-link:hover::after,
.masthead-nav-link[aria-current="page"]::after {
  width: 100%;
}

.masthead-brand {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 1.25rem;
  border-left: 1px solid var(--rule-light);
  border-right: 1px solid var(--rule-light);
}

.masthead-brand__title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ink-primary);
  line-height: 1.15;
}

.masthead-brand__sub {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  color: var(--ink-muted);
  text-transform: uppercase;
  margin-top: 0.18rem;
}

.masthead-cta-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--terracotta);
  color: #FFFDF9;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 1.05rem;
  border-radius: 999px;
  border: 1px solid var(--ink-primary);
  box-shadow: 2px 2px 0 var(--ink-primary);
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

.masthead-cta-pill:hover {
  background: var(--terracotta-dark);
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 var(--ink-primary);
}

.masthead-mobile-toggle {
  display: none;
  background: var(--bg-paper);
  border: 1px solid var(--ink-primary);
  color: var(--ink-primary);
  padding: 0.4rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
}

/* Legacy subpage site-header fallback support */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 246, 240, 0.95);
  border-bottom: 2px solid var(--rule-dark);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 1rem;
}
.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: 0.06em;
}
.site-header__nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.site-header__menu {
  display: flex;
  list-style: none;
  gap: 1.35rem;
  margin: 0;
  padding: 0;
}
.site-header__link {
  font-size: 0.92rem;
  color: var(--ink-secondary);
  font-weight: 500;
}
.site-header__link:hover,
.site-header__link[aria-current="page"] {
  color: var(--terracotta);
}
.site-header__cta {
  background: var(--terracotta);
  color: #FFFDF9;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 600;
  border: 1px solid var(--ink-primary);
  box-shadow: 2px 2px 0 var(--ink-primary);
}
.site-header__toggle {
  display: none;
}

/* ==========================================================================
   2. HERO LAYOUT: ASYMMETRIC EDITORIAL COVER + 3D FAN-OUT ROUTE PASSPORTS
   ========================================================================== */

.editorial-hero {
  padding: 2.5rem 0 4.5rem;
  border-bottom: 2px solid var(--rule-dark);
  position: relative;
}

.editorial-hero__top-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  margin-bottom: 1.75rem;
  border-bottom: 1px solid var(--rule-light);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
  flex-wrap: wrap;
  gap: 0.75rem;
}

.editorial-hero__stamp {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.2rem 0.65rem;
  background: var(--terracotta-soft);
  color: var(--terracotta);
  border: 1px solid var(--terracotta);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.editorial-hero__headline-wrap {
  margin-bottom: 2.75rem;
}

.editorial-hero__kicker {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--terracotta);
  margin: 0 0 0.65rem;
  display: block;
}

.editorial-hero__h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.15rem, 4.2vw, 3.65rem);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ink-primary);
  max-width: 24ch;
}

.ink-underline {
  position: relative;
  display: inline-block;
  color: var(--terracotta);
}

.ink-underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0.06em;
  width: 100%;
  height: 0.22em;
  background: rgba(200, 90, 50, 0.22);
  z-index: -1;
  transform-origin: left center;
  animation: inkStrokeReveal 1.1s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes inkStrokeReveal {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

.hero-editorial-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 3rem;
  align-items: start;
}

.hero-manifesto {
  background: var(--bg-paper);
  border: 1px solid var(--ink-primary);
  padding: 2rem;
  position: relative;
  box-shadow: 6px 6px 0 rgba(30, 27, 24, 0.09);
}

.hero-manifesto::before {
  content: "MANIFESTO // 远行刊首语";
  position: absolute;
  top: -0.7rem;
  left: 1.5rem;
  background: var(--bg-espresso);
  color: var(--brass);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.15rem 0.6rem;
  letter-spacing: 0.1em;
}

.hero-manifesto__dropcap {
  font-size: 1.04rem;
  color: var(--ink-secondary);
  margin: 0 0 1.35rem;
  line-height: 1.82;
}

.hero-manifesto__dropcap::first-letter {
  font-family: var(--font-serif);
  font-size: 3.1rem;
  float: left;
  line-height: 0.9;
  padding-right: 0.55rem;
  padding-top: 0.12rem;
  color: var(--terracotta);
  font-weight: 700;
}

.mode-selector-box {
  background: var(--bg-linen);
  border: 1px solid var(--rule-light);
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.mode-selector-box__label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-muted);
  margin-bottom: 0.55rem;
  display: flex;
  justify-content: space-between;
}

.mode-selector-buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.4rem;
}

.mode-btn {
  background: var(--bg-paper);
  border: 1px solid var(--rule-light);
  padding: 0.48rem 0.4rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.mode-btn.is-active {
  background: var(--ink-primary);
  color: #FFFDF9;
  border-color: var(--ink-primary);
}

.mode-selector-note {
  margin: 0.65rem 0 0;
  font-size: 0.83rem;
  color: var(--sage);
  font-weight: 500;
  line-height: 1.5;
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.btn-editorial-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  background: var(--terracotta);
  color: #FFFDF9;
  font-weight: 600;
  font-size: 0.96rem;
  padding: 0.82rem 1.55rem;
  border: 1.5px solid var(--ink-primary);
  box-shadow: 4px 4px 0 var(--ink-primary);
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

.btn-editorial-primary:hover {
  background: var(--terracotta-dark);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--ink-primary);
}

.btn-editorial-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  background: var(--bg-paper);
  color: var(--ink-primary);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.82rem 1.25rem;
  border: 1.5px solid var(--ink-primary);
  transition: background-color 0.18s ease, transform 0.18s ease;
}

.btn-editorial-secondary:hover {
  background: var(--bg-linen);
  transform: translateY(-1px);
}

.hero-colophon-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  padding-top: 1.15rem;
  border-top: 1px dashed var(--rule-light);
}

.colophon-metric__val {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink-primary);
  display: block;
}

.colophon-metric__lbl {
  font-size: 0.76rem;
  color: var(--ink-muted);
}

/* Right Column: 3D Fan-Out Route Passports */
.passport-stage {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.passport-stage__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
}

.passport-stack {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  perspective: 1200px;
}

.route-passport {
  background: var(--bg-paper);
  border: 1.5px solid var(--ink-primary);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.5rem;
  position: relative;
  cursor: pointer;
  transition: transform 0.38s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.38s ease, border-color 0.25s ease, background-color 0.25s ease;
  box-shadow: 4px 4px 0 rgba(30, 27, 24, 0.1);
  overflow: hidden;
}

.route-passport::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background: var(--rule-light);
  transition: background-color 0.25s ease;
}

.route-passport:hover {
  transform: translate3d(-4px, -3px, 14px) rotate(-0.4deg);
}

.route-passport.is-active {
  background: #FFFDF9;
  border-color: var(--terracotta);
  box-shadow: 10px 12px 0 var(--ink-primary);
  transform: translate3d(-6px, -4px, 24px) rotate(-0.6deg);
  z-index: 5;
}

.route-passport.is-active::before {
  background: var(--terracotta);
}

.route-passport__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.7rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px dashed var(--rule-light);
}

.route-passport__serial {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--terracotta);
  letter-spacing: 0.08em;
}

.route-passport__stamp {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.15rem 0.55rem;
  border-radius: 99px;
  border: 1px solid var(--sage);
  color: var(--sage);
  background: var(--sage-soft);
  font-weight: 600;
}

.route-passport__body {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: center;
}

.route-passport__title {
  font-family: var(--font-serif);
  font-size: 1.22rem;
  font-weight: 700;
  margin: 0 0 0.3rem;
  color: var(--ink-primary);
}

.route-passport__desc {
  font-size: 0.86rem;
  color: var(--ink-secondary);
  margin: 0;
}

.route-passport__airports {
  font-family: var(--font-mono);
  text-align: right;
  background: var(--bg-linen);
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--rule-light);
  border-radius: var(--radius-sm);
}

.route-passport__code {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink-primary);
  display: block;
}

.route-passport__ping {
  font-size: 0.75rem;
  color: var(--sage);
  font-weight: 600;
}

/* Telemetry Readout Strip below passports */
.passport-telemetry-strip {
  background: var(--bg-espresso);
  color: #FAF6F0;
  border: 1.5px solid var(--ink-primary);
  padding: 1rem 1.25rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.telemetry-badge {
  background: var(--terracotta);
  color: #FFFDF9;
  padding: 0.25rem 0.6rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.telemetry-details {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  color: #D8CFC2;
}

.telemetry-details strong {
  color: var(--brass);
}

/* ==========================================================================
   SECTION HEADER COMMON EDITORIAL BAR
   ========================================================================== */

.editorial-chapter {
  padding: 5rem 0;
  border-bottom: 2px solid var(--rule-dark);
}

.editorial-chapter--linen {
  background-color: var(--bg-linen);
}

.chapter-rubric {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 2px solid var(--ink-primary);
  border-bottom: 1px solid var(--rule-light);
  padding: 0.55rem 0;
  margin-bottom: 2.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.chapter-rubric__tag {
  color: var(--terracotta);
  font-weight: 700;
}

/* ==========================================================================
   3. CHAPTER I: STICKY LEFT-SIDEBAR + SCROLLING RIGHT-STREAM
   ========================================================================== */

.sticky-editorial-layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 3.5rem;
  align-items: start;
}

.sticky-editorial-aside {
  position: sticky;
  top: 108px;
  background: var(--bg-paper);
  border: 1.5px solid var(--ink-primary);
  padding: 2rem 1.75rem;
  box-shadow: 6px 6px 0 rgba(30, 27, 24, 0.08);
}

.sticky-counter-wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--rule-light);
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
}

.sticky-counter-num {
  font-family: var(--font-serif);
  font-size: 4.5rem;
  font-weight: 700;
  line-height: 0.9;
  color: var(--terracotta);
  transition: transform 0.25s ease;
}

.sticky-counter-total {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.sticky-editorial-aside__title {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  margin: 0 0 0.6rem;
  line-height: 1.35;
}

.sticky-editorial-aside__active-story {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--sage);
  background: var(--sage-soft);
  border: 1px solid var(--sage);
  padding: 0.4rem 0.65rem;
  margin-bottom: 1.25rem;
  display: block;
}

.astrolabe-box {
  display: flex;
  justify-content: center;
  padding: 1rem 0;
  border-top: 1px dashed var(--rule-light);
  border-bottom: 1px dashed var(--rule-light);
  margin-bottom: 1.25rem;
}

.astrolabe-svg {
  transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.sticky-chapter-nav {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.sticky-chapter-nav__item {
  font-size: 0.84rem;
  color: var(--ink-muted);
  padding: 0.35rem 0.5rem;
  border-left: 2px solid var(--rule-light);
  transition: all 0.2s ease;
}

.sticky-chapter-nav__item.is-current {
  color: var(--ink-primary);
  font-weight: 600;
  border-left-color: var(--terracotta);
  background: var(--bg-linen);
}

/* Right scrolling editorial spreads */
.editorial-story-stream {
  display: flex;
  flex-direction: column;
  gap: 2.75rem;
}

.editorial-story-spread {
  background: var(--bg-paper);
  border: 1.5px solid var(--ink-primary);
  padding: 2.25rem;
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.editorial-story-spread:hover {
  box-shadow: 8px 8px 0 rgba(30, 27, 24, 0.1);
}

.story-spread__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--terracotta);
  border-bottom: 1px solid var(--rule-light);
  padding-bottom: 0.75rem;
  margin-bottom: 1.25rem;
}

.story-spread__grid {
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: 2rem;
  align-items: center;
}

.story-spread__title {
  font-family: var(--font-serif);
  font-size: 1.55rem;
  margin: 0 0 0.85rem;
  line-height: 1.32;
}

.story-spread__narrative {
  font-size: 0.95rem;
  color: var(--ink-secondary);
  margin: 0 0 1.15rem;
}

.story-spread__quote {
  margin: 1rem 0 0;
  padding: 0.8rem 1rem;
  background: var(--bg-linen);
  border-left: 3px solid var(--terracotta);
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--ink-primary);
}

.story-spread__diagram {
  background: var(--bg-parchment);
  border: 1px solid var(--rule-light);
  padding: 1.25rem;
  text-align: center;
}

.story-spread__specs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.85rem;
}

.spec-chip {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  padding: 0.2rem 0.55rem;
  background: var(--bg-paper);
  border: 1px solid var(--rule-dark);
  color: var(--ink-primary);
}

/* ==========================================================================
   4. CHAPTER II: INTERACTIVE FILTERABLE ECOSYSTEM FILMSTRIP SHOWCASE
   ========================================================================== */

.ecosystem-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.ecosystem-header__title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  margin: 0 0 0.5rem;
}

.ecosystem-header__sub {
  color: var(--ink-secondary);
  margin: 0;
  max-width: 58ch;
}

.ecosystem-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: var(--bg-paper);
  border: 1.5px solid var(--ink-primary);
  padding: 0.85rem 1.25rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.ecosystem-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.eco-tab-btn {
  background: transparent;
  border: 1px solid var(--rule-light);
  padding: 0.45rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--ink-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.eco-tab-btn.is-active {
  background: var(--terracotta);
  color: #FFFDF9;
  border-color: var(--ink-primary);
  box-shadow: 2px 2px 0 var(--ink-primary);
}

.ecosystem-region-switcher {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.region-pill-btn {
  background: var(--bg-linen);
  border: 1px solid var(--rule-light);
  padding: 0.3rem 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
  color: var(--ink-secondary);
}

.region-pill-btn.is-active {
  background: var(--sage);
  color: #FFFDF9;
  border-color: var(--ink-primary);
}

.ecosystem-filmstrip-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.eco-archive-card {
  background: var(--bg-paper);
  border: 1.5px solid var(--ink-primary);
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.28s ease, opacity 0.28s ease, box-shadow 0.28s ease;
  position: relative;
}

.eco-archive-card:hover {
  transform: translateY(-4px);
  box-shadow: 5px 5px 0 var(--ink-primary);
}

.eco-archive-card.is-hidden {
  display: none;
}

.eco-archive-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px dashed var(--rule-light);
}

.eco-archive-card__cat {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.15rem 0.5rem;
  background: var(--bg-linen);
  color: var(--ink-secondary);
}

.eco-archive-card__region-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--sage);
  font-weight: 700;
}

.eco-archive-card__title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  margin: 0 0 0.45rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.eco-archive-card__desc {
  font-size: 0.85rem;
  color: var(--ink-secondary);
  margin: 0 0 1rem;
  line-height: 1.6;
}

.eco-archive-card__foot {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
  border-top: 1px solid var(--rule-light);
  padding-top: 0.6rem;
  display: flex;
  justify-content: space-between;
}

/* ==========================================================================
   5. CHAPTER III: HORIZONTAL BOARDING-PASS PRICING TICKETS
   ========================================================================== */

.pricing-editorial-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2.25rem;
  flex-wrap: wrap;
}

.billing-cycle-switcher {
  display: inline-flex;
  background: var(--bg-paper);
  border: 1.5px solid var(--ink-primary);
  padding: 0.3rem;
  gap: 0.3rem;
  box-shadow: 4px 4px 0 rgba(30, 27, 24, 0.1);
}

.cycle-btn {
  background: transparent;
  border: none;
  padding: 0.55rem 1.1rem;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--ink-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.cycle-btn.is-active {
  background: var(--ink-primary);
  color: #FFFDF9;
}

.cycle-discount-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  background: var(--terracotta);
  color: #FFFDF9;
  padding: 0.1rem 0.4rem;
  border-radius: 2px;
}

.boarding-pass-stack {
  display: flex;
  flex-direction: column;
  gap: 1.65rem;
}

.boarding-ticket {
  display: grid;
  grid-template-columns: 250px 1fr 240px;
  background: var(--bg-paper);
  border: 2px solid var(--ink-primary);
  position: relative;
  box-shadow: 6px 6px 0 rgba(30, 27, 24, 0.1);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.boarding-ticket:hover {
  transform: translateY(-3px);
  box-shadow: 10px 10px 0 rgba(30, 27, 24, 0.16);
}

.boarding-ticket--featured {
  background: #FFFDF8;
  border-color: var(--terracotta);
  box-shadow: 8px 8px 0 var(--ink-primary);
}

/* Semi-circular ticket perforation notches */
.boarding-ticket::before,
.boarding-ticket::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  background: var(--bg-parchment);
  border: 2px solid var(--ink-primary);
  border-radius: 50%;
  right: 229px;
  z-index: 3;
}

.boarding-ticket--featured::before,
.boarding-ticket--featured::after {
  border-color: var(--terracotta);
}

.boarding-ticket::before {
  top: -13px;
}

.boarding-ticket::after {
  bottom: -13px;
}

.boarding-ticket__class-col {
  background: var(--bg-linen);
  padding: 1.75rem 1.5rem;
  border-right: 1.5px dashed var(--rule-dark);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.boarding-ticket--featured .boarding-ticket__class-col {
  background: var(--terracotta-soft);
}

.ticket-class-code {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--terracotta);
  text-transform: uppercase;
}

.ticket-class-name {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0.35rem 0 0.4rem;
  color: var(--ink-primary);
}

.ticket-class-audience {
  font-size: 0.82rem;
  color: var(--ink-secondary);
  margin: 0;
}

.ticket-barcode {
  margin-top: 1.1rem;
  opacity: 0.75;
}

.boarding-ticket__itinerary-col {
  padding: 1.75rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.1rem;
}

.itinerary-route-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--rule-light);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.itinerary-spec-pills {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
}

.itinerary-pill {
  background: var(--bg-parchment);
  border: 1px solid var(--rule-light);
  padding: 0.65rem 0.85rem;
}

.itinerary-pill__lbl {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-muted);
  display: block;
}

.itinerary-pill__val {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--ink-primary);
}

.itinerary-perks {
  font-size: 0.86rem;
  color: var(--ink-secondary);
  margin: 0;
}

.boarding-ticket__stub-col {
  padding: 1.75rem 1.5rem;
  border-left: 2px dashed var(--rule-dark);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  text-align: center;
  background: var(--bg-paper);
}

.stub-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 0.15rem;
}

.stub-currency {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--terracotta);
}

.stub-amount {
  font-family: var(--font-serif);
  font-size: 2.65rem;
  font-weight: 700;
  line-height: 1;
  color: var(--ink-primary);
  transition: transform 0.2s ease;
}

.stub-unit {
  font-size: 0.82rem;
  color: var(--ink-muted);
}

.stub-billing-note {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--sage);
  margin: 0.35rem 0 1rem;
}

.stub-cta-btn {
  width: 100%;
  text-align: center;
  padding: 0.7rem 1rem;
  font-weight: 600;
  font-size: 0.88rem;
  border: 1.5px solid var(--ink-primary);
  background: var(--ink-primary);
  color: #FFFDF9;
  transition: all 0.2s ease;
}

.boarding-ticket--featured .stub-cta-btn {
  background: var(--terracotta);
  box-shadow: 3px 3px 0 var(--ink-primary);
}

.stub-cta-btn:hover {
  background: var(--terracotta-dark);
  color: #FFFDF9;
}

/* ==========================================================================
   6. CHAPTER IV: ROUTE SOMMELIER QUIZ + TWO-COLUMN NEWSPAPER Q&A INDEX
   ========================================================================== */

.sommelier-box {
  background: var(--bg-paper);
  border: 2px solid var(--ink-primary);
  padding: 2.25rem;
  margin-bottom: 3.5rem;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2.5rem;
  align-items: center;
  box-shadow: 6px 6px 0 rgba(30, 27, 24, 0.09);
}

.sommelier-step {
  margin-bottom: 1.25rem;
}

.sommelier-step__label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--terracotta);
  font-weight: 700;
  margin-bottom: 0.5rem;
  display: block;
}

.sommelier-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.sommelier-opt-btn {
  background: var(--bg-parchment);
  border: 1px solid var(--rule-dark);
  padding: 0.5rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-secondary);
  cursor: pointer;
  transition: all 0.18s ease;
}

.sommelier-opt-btn.is-selected {
  background: var(--ink-primary);
  color: #FFFDF9;
}

.sommelier-prescription {
  background: var(--bg-linen);
  border: 1.5px solid var(--ink-primary);
  padding: 1.6rem;
  position: relative;
}

.sommelier-prescription__stamp {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--terracotta);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 0.4rem;
}

.sommelier-prescription__plan {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
}

.sommelier-prescription__reason {
  font-size: 0.88rem;
  color: var(--ink-secondary);
  margin: 0 0 1.2rem;
}

/* Two-Column Newspaper Q&A Grid */
.newspaper-faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem 2.25rem;
}

.newspaper-qa-item {
  background: var(--bg-paper);
  border: 1px solid var(--ink-primary);
  padding: 1.4rem 1.6rem;
}

.newspaper-qa-item__num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--terracotta);
  font-weight: 700;
  display: block;
  margin-bottom: 0.3rem;
}

.newspaper-qa-item__q {
  font-family: var(--font-serif);
  font-size: 1.12rem;
  font-weight: 700;
  margin: 0 0 0.65rem;
  color: var(--ink-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.newspaper-qa-item__a {
  font-size: 0.9rem;
  color: var(--ink-secondary);
  margin: 0;
  line-height: 1.72;
}

/* ==========================================================================
   7. ZHINAN.HTML: EDITORIAL MAGAZINE ISSUE INDEX
   ========================================================================== */

.issue-lead-spread {
  background: var(--bg-paper);
  border: 2px solid var(--ink-primary);
  padding: 2.5rem;
  margin-bottom: 3rem;
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 2.5rem;
  align-items: center;
  box-shadow: 8px 8px 0 rgba(30, 27, 24, 0.1);
}

.issue-toc-list {
  display: flex;
  flex-direction: column;
  border-top: 2px solid var(--ink-primary);
}

.issue-toc-row {
  display: grid;
  grid-template-columns: 72px 1fr 220px 130px;
  gap: 1.5rem;
  align-items: center;
  padding: 1.65rem 1rem;
  border-bottom: 1px solid var(--rule-dark);
  background: rgba(255, 253, 249, 0.6);
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.issue-toc-row:hover {
  background: var(--bg-paper);
  transform: translateX(4px);
}

.issue-toc-row__num {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--terracotta);
}

.issue-toc-row__title {
  font-family: var(--font-serif);
  font-size: 1.28rem;
  margin: 0 0 0.35rem;
}

.issue-toc-row__title a:hover {
  color: var(--terracotta);
}

.issue-toc-row__excerpt {
  font-size: 0.88rem;
  color: var(--ink-secondary);
  margin: 0;
}

.issue-toc-row__meta {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

/* ==========================================================================
   8. SUBPAGE & ARTICLE SHELL SUPPORT (.article-shell, .breadcrumb-bar, etc.)
   ========================================================================== */

.breadcrumb-bar {
  background: var(--bg-linen);
  border-bottom: 1px solid var(--rule-light);
  padding: 0.75rem 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.breadcrumb-bar__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  color: var(--ink-muted);
}

.breadcrumb-bar__list a {
  color: var(--ink-primary);
  font-weight: 600;
}

.breadcrumb-bar__list a:hover {
  color: var(--terracotta);
}

.page-section {
  padding: 3.5rem 0;
}

.page-section__header {
  margin-bottom: 2.5rem;
  border-bottom: 2px solid var(--ink-primary);
  padding-bottom: 1.5rem;
}

.page-section__title {
  font-family: var(--font-serif);
  font-size: clamp(1.85rem, 3.2vw, 2.6rem);
  margin: 0 0 0.65rem;
}

.page-section__lead {
  font-size: 1.02rem;
  color: var(--ink-secondary);
  max-width: 66ch;
  margin: 0;
}

.article-shell {
  padding: 3rem 0 4.5rem;
}

.article-shell__container {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-paper);
  border: 1.5px solid var(--ink-primary);
  padding: 2.75rem 3rem;
  box-shadow: 8px 8px 0 rgba(30, 27, 24, 0.08);
}

.article-shell__header {
  border-bottom: 2px solid var(--ink-primary);
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
}

.article-shell__title {
  font-family: var(--font-serif);
  font-size: clamp(1.65rem, 2.8vw, 2.25rem);
  line-height: 1.3;
  margin: 0 0 0.85rem;
}

.article-shell__byline {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
}

.article-shell__content h2 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  margin: 2.2rem 0 0.85rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--rule-light);
}

.article-shell__content h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  margin: 1.5rem 0 0.5rem;
}

.article-shell__content p,
.article-shell__content li {
  color: var(--ink-secondary);
  font-size: 0.98rem;
  line-height: 1.8;
}

.article-shell__content a {
  color: var(--terracotta);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-shell__callout {
  background: var(--bg-linen);
  border-left: 4px solid var(--terracotta);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.article-shell__cta-box,
.final-cta__box {
  background: var(--bg-linen);
  border: 1.5px solid var(--ink-primary);
  padding: 1.75rem 2rem;
  margin: 2.25rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.4rem;
  font-weight: 600;
  border: 1.5px solid var(--ink-primary);
}

.action-btn--primary {
  background: var(--terracotta);
  color: #FFFDF9 !important;
  text-decoration: none !important;
  box-shadow: 3px 3px 0 var(--ink-primary);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.faq-list__item {
  border: 1px solid var(--rule-dark);
  background: var(--bg-parchment);
  padding: 0.9rem 1.2rem;
}

.faq-list__summary {
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
}

.article-shell__related {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px dashed var(--rule-dark);
}

/* ==========================================================================
   9. EDITORIAL FOOTER
   ========================================================================== */

.site-footer {
  background: var(--bg-espresso);
  color: #E8E0D5;
  padding: 3.5rem 0 2.75rem;
  border-top: 3px solid var(--terracotta);
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.site-footer__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 2rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.site-footer__brand-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: #FFFDF9;
  letter-spacing: 0.08em;
  margin: 0 0 0.4rem;
}

.site-footer__links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.site-footer__link {
  color: var(--brass);
  font-size: 0.9rem;
}

.site-footer__link:hover {
  color: #FFFDF9;
  text-decoration: underline;
}

.site-footer__disclosure {
  font-size: 0.82rem;
  color: #ABA297;
  line-height: 1.6;
}

/* Scroll Reveal Animations */
.reveal-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   10. RESPONSIVE BREAKPOINTS
   ========================================================================== */

@media (max-width: 1040px) {
  .masthead-main__grid {
    grid-template-columns: 1fr auto;
  }
  .masthead-nav-group--left {
    display: none;
  }
  .masthead-brand {
    border-left: none;
    align-items: flex-start;
    padding-left: 0;
  }
  .hero-editorial-grid,
  .sticky-editorial-layout,
  .sommelier-box,
  .issue-lead-spread {
    grid-template-columns: 1fr;
  }
  .sticky-editorial-aside {
    position: static;
  }
  .ecosystem-filmstrip-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .boarding-ticket {
    grid-template-columns: 1fr;
  }
  .boarding-ticket::before,
  .boarding-ticket::after {
    display: none;
  }
  .boarding-ticket__class-col {
    border-right: none;
    border-bottom: 1.5px dashed var(--rule-dark);
  }
  .boarding-ticket__stub-col {
    border-left: none;
    border-top: 2px dashed var(--rule-dark);
  }
  .issue-toc-row {
    grid-template-columns: 50px 1fr;
  }
}

@media (max-width: 680px) {
  .masthead-mobile-toggle {
    display: inline-block;
  }
  .masthead-nav-group--right {
    display: none;
  }
  .masthead-main.is-open .masthead-nav-group--left,
  .masthead-main.is-open .masthead-nav-group--right {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    grid-column: 1 / -1;
    padding-top: 0.75rem;
  }
  .story-spread__grid,
  .newspaper-faq-grid,
  .ecosystem-filmstrip-grid,
  .itinerary-spec-pills,
  .mode-selector-buttons {
    grid-template-columns: 1fr;
  }
  .article-shell__container {
    padding: 1.5rem 1.25rem;
  }
}