/* ==========================================================================
   FlyingBirds 飞鸟云 铁道网络调度中心 (FlyingBirds Railway Dispatch Network) - Style System
   Color Palette:
     - Cream: #FFF7E8 (Ground & Ticket Paper)
     - Railway Green: #184D3B (Heritage Carriage & Ironwork)
     - Signal Red: #C84638 (Semaphore Lamp & Primary Alerts)
     - Brass: #B58A42 (Clockworks, Levers & Mechanical Trims)
   Typography:
     - System Chinese Serif for Headings
     - Readable Sans-serif for Body
     - Monospace for Timetables, Status, Latency & Port Codes
   ========================================================================== */

:root {
  --cream: #FFF7E8;
  --cream-paper: #FAF2E0;
  --cream-card: #FDF9F0;
  --cream-dark: #EFE4CE;
  
  --railway-green: #184D3B;
  --railway-green-dark: #0F3327;
  --railway-green-light: #22644D;
  --railway-green-subtle: rgba(24, 77, 59, 0.08);

  --signal-red: #C84638;
  --signal-red-dark: #A33328;
  --signal-red-glow: rgba(200, 70, 56, 0.25);
  --signal-amber: #D98826;
  --signal-green: #2B8C65;

  --brass: #B58A42;
  --brass-light: #D9A95B;
  --brass-dark: #876228;
  --brass-subtle: rgba(181, 138, 66, 0.15);

  --iron-black: #121A16;
  --iron-slate: #1D2622;
  --text-main: #232B27;
  --text-muted: #56635C;
  --text-light: #8E9C94;
  --text-cream: #FFF7E8;

  --border-brass: rgba(181, 138, 66, 0.4);
  --border-green: rgba(24, 77, 59, 0.25);
  --border-subtle: rgba(18, 26, 22, 0.12);

  --font-serif: "Songti SC", "SimSun", "STSong", "Noto Serif SC", "Source Han Serif SC", "Songti", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "SF Mono", "Consolas", "Monaco", "Courier New", monospace;

  --shadow-sm: 0 2px 4px rgba(18, 26, 22, 0.06);
  --shadow-md: 0 4px 12px rgba(18, 26, 22, 0.1);
  --shadow-lg: 0 8px 24px rgba(18, 26, 22, 0.14);
  --shadow-brass: 0 4px 14px rgba(181, 138, 66, 0.25);
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --max-w: 1200px;
}

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

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

body {
  background-color: var(--cream);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.68;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  background-image: 
    radial-gradient(rgba(181, 138, 66, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, #FFF7E8 0%, #FAF3E3 100%);
  background-size: 24px 24px, 100% 100%;
  min-height: 100vh;
}

/* Typography Defaults */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  color: var(--railway-green-dark);
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: 0.02em;
}

p {
  margin-bottom: 1.15rem;
}

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

a {
  color: var(--railway-green);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

a:hover {
  color: var(--signal-red);
  text-decoration-color: var(--signal-red);
}

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

/* Accessibility & Focus Outline */
:focus-visible {
  outline: 3px solid var(--signal-amber);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

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

/* ==========================================================================
   Station Signboard & Navigation
   ========================================================================== */
.station-header {
  background: var(--railway-green);
  color: var(--cream);
  border-bottom: 3px solid var(--brass);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 16px rgba(15, 51, 39, 0.35);
}

.station-topbar {
  background: var(--railway-green-dark);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 0.25rem 0;
  border-bottom: 1px solid rgba(181, 138, 66, 0.3);
  color: var(--brass-light);
}

.station-topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.status-beacon {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.beacon-dot {
  width: 8px;
  height: 8px;
  background-color: #38E09A;
  border-radius: 50%;
  box-shadow: 0 0 8px #38E09A;
  display: inline-block;
  animation: pulse-lamp 2s infinite ease-in-out;
}

@keyframes pulse-lamp {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.85); }
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.45rem 0;
}

.station-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--cream);
}

.station-emblem {
  width: 36px;
  height: 36px;
  background: var(--brass);
  border: 2px solid var(--cream);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 0 6px rgba(0,0,0,0.4);
  color: var(--railway-green-dark);
  font-weight: 900;
  font-size: 1rem;
  font-family: var(--font-serif);
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--cream);
  line-height: 1.15;
}

.brand-subtitle {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--brass-light);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Nav Menu */
.main-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-list {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 0.95rem;
}

.nav-link {
  color: var(--cream);
  text-decoration: none;
  font-size: 0.86rem;
  font-weight: 500;
  padding: 0.25rem 0.15rem;
  position: relative;
  transition: color 0.2s ease;
}

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

.nav-link:hover {
  color: var(--brass-light);
  text-decoration: none;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Commercial CTA Buttons */
.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-serif);
  font-weight: 700;
  text-decoration: none;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-sm);
  letter-spacing: 0.03em;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  text-align: center;
  line-height: 1.3;
  border: 1px solid transparent;
}

.btn-signal-red {
  background: var(--signal-red);
  color: #FFFFFF;
  border-color: #E2584A;
  box-shadow: 0 3px 10px var(--signal-red-glow), inset 0 1px 0 rgba(255,255,255,0.25);
}

.btn-signal-red:hover {
  background: var(--signal-red-dark);
  color: #FFFFFF;
  transform: translateY(-1px);
  box-shadow: 0 5px 14px rgba(200, 70, 56, 0.4);
  text-decoration: none;
}

.btn-brass {
  background: linear-gradient(135deg, #C99C4E 0%, #9E742F 100%);
  color: #121A16;
  border-color: #ECC77D;
  box-shadow: 0 3px 8px rgba(181, 138, 66, 0.3), inset 0 1px 0 rgba(255,255,255,0.4);
}

.btn-brass:hover {
  background: linear-gradient(135deg, #DBAE5F 0%, #B0833C 100%);
  color: #121A16;
  transform: translateY(-1px);
  text-decoration: none;
}

.btn-railway-outline {
  background: transparent;
  color: var(--railway-green-dark);
  border: 2px solid var(--railway-green);
}

.btn-railway-outline:hover {
  background: var(--railway-green);
  color: var(--cream);
  text-decoration: none;
}

.nav-cta-btn {
  padding: 0.35rem 0.85rem;
  font-size: 0.82rem;
}

/* Mobile Toggle */
.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--brass);
  color: var(--cream);
  padding: 0.35rem 0.55rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

/* Mobile Drawer (Hidden by default everywhere, especially on Desktop) */
.mobile-nav-drawer {
  display: none !important;
}

@media (max-width: 820px) {
  .mobile-nav-drawer.open {
    display: block !important;
  }
}

/* ==========================================================================
   Hero Section: Split-flap Departure Board & Title
   ========================================================================== */
.hero-section {
  padding: 2rem 0 1.5rem;
  position: relative;
}

.hero-header-box {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 1.8rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--cream-dark);
  border: 1px solid var(--brass);
  color: var(--railway-green-dark);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 0.85rem;
}

.hero-title {
  font-size: clamp(1.5rem, 3.2vw, 2.3rem);
  color: var(--railway-green-dark);
  margin-bottom: 0.75rem;
  text-shadow: 0 1px 2px rgba(24, 77, 59, 0.1);
}

.hero-intro {
  font-size: clamp(0.92rem, 1.4vw, 1.05rem);
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 1.35rem;
}

.hero-actions {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.hero-disclaimer-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Departure Board (翻牌式列车站台发车时刻表) */
.departure-board-frame {
  background: var(--iron-black);
  border: 3px solid var(--brass);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  box-shadow: var(--shadow-lg), inset 0 0 30px rgba(0,0,0,0.8);
  margin-bottom: 2.5rem;
  color: var(--cream);
  position: relative;
  overflow: hidden;
}

.board-metal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid rgba(181, 138, 66, 0.4);
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.board-station-name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--brass-light);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.board-clock {
  font-family: var(--font-mono);
  background: #000;
  color: #38E09A;
  padding: 0.25rem 0.65rem;
  border: 1px solid #234D3B;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  letter-spacing: 0.1em;
}

/* Timetable Table */
.timetable-scroll-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.timetable {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  min-width: 680px;
}

.timetable th {
  background: #192620;
  color: var(--brass-light);
  text-align: left;
  padding: 0.65rem 0.85rem;
  border-bottom: 2px solid var(--brass);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

.timetable td {
  padding: 0.75rem 0.85rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: #E2ECE6;
  white-space: nowrap;
}

.timetable tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.02);
}

.timetable tr:hover td {
  background: rgba(181, 138, 66, 0.12);
}

.tag-badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 3px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.tag-on-time {
  background: rgba(43, 140, 101, 0.25);
  color: #4AE4A7;
  border: 1px solid #2B8C65;
}

.tag-express {
  background: rgba(200, 70, 56, 0.25);
  color: #FF877A;
  border: 1px solid #C84638;
}

.tag-auto {
  background: rgba(181, 138, 66, 0.25);
  color: #F8D28A;
  border: 1px solid #B58A42;
}

/* ==========================================================================
   Schematic Railway Map (线路拓扑示意图)
   ========================================================================== */
.railway-map-container {
  background: var(--cream-paper);
  border: 2px solid var(--border-brass);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 3.5rem;
  box-shadow: var(--shadow-md);
  position: relative;
}

.map-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.map-title {
  font-size: 1.25rem;
  color: var(--railway-green-dark);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.map-legend {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  flex-wrap: wrap;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.legend-bar {
  width: 18px;
  height: 4px;
  border-radius: 2px;
}

.legend-bar.hk-line { background: #184D3B; }
.legend-bar.jp-line { background: #B58A42; }
.legend-bar.us-line { background: #C84638; }
.legend-bar.ai-line { background: #2A8C68; }

.schematic-svg-wrap {
  width: 100%;
  overflow-x: auto;
  padding: 0.5rem 0;
}

.schematic-svg {
  width: 100%;
  min-width: 680px;
  height: auto;
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section-block {
  padding: 2.5rem 0;
  position: relative;
}

.section-block.alt-bg {
  background-color: rgba(24, 77, 59, 0.03);
  border-top: 1px dashed var(--border-brass);
  border-bottom: 1px dashed var(--border-brass);
}

.section-title-wrap {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 1.75rem;
}

.section-sublabel {
  font-family: var(--font-mono);
  color: var(--brass-dark);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 700;
}

.section-heading {
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  color: var(--railway-green-dark);
  margin-bottom: 0.75rem;
}

.section-lead {
  font-size: 1rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Station-Service Rows (产品优势)
   ========================================================================== */
.service-rows-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.service-row-card {
  background: var(--cream-card);
  border: 1px solid var(--border-brass);
  border-left: 6px solid var(--railway-green);
  border-radius: var(--radius-sm);
  padding: 1.5rem 1.75rem;
  box-shadow: var(--shadow-sm);
  display: grid;
  grid-template-columns: 80px 1fr auto;
  align-items: center;
  gap: 1.5rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.service-row-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--signal-red);
}

.service-code {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--railway-green);
  text-align: center;
  background: var(--cream-dark);
  padding: 0.5rem 0.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(181, 138, 66, 0.3);
}

.service-body h3 {
  font-size: 1.15rem;
  margin-bottom: 0.35rem;
  color: var(--railway-green-dark);
}

.service-body p {
  font-size: 0.94rem;
  color: var(--text-muted);
  margin: 0;
}

.service-meta-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.35rem 0.75rem;
  background: rgba(24, 77, 59, 0.08);
  color: var(--railway-green);
  border-radius: 999px;
  font-weight: 600;
  white-space: nowrap;
}

/* ==========================================================================
   Destination Notes (节点网络)
   ========================================================================== */
.destinations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.destination-card {
  background: var(--cream-paper);
  border: 1px solid var(--border-brass);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.dest-stamp {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--brass-dark);
  border: 1px dashed var(--brass);
  padding: 0.15rem 0.45rem;
  border-radius: 2px;
  transform: rotate(3deg);
}

.dest-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.dest-flag-icon {
  width: 32px;
  height: 32px;
  background: var(--railway-green);
  color: var(--cream);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.dest-title {
  font-size: 1.15rem;
  color: var(--railway-green-dark);
}

.dest-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  flex-grow: 1;
}

.dest-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: rgba(24, 77, 59, 0.04);
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-sm);
  border-top: 1px solid rgba(181, 138, 66, 0.2);
}

.spec-item {
  display: flex;
  flex-direction: column;
}

.spec-label {
  color: var(--text-light);
  font-size: 0.72rem;
}

.spec-val {
  color: var(--railway-green-dark);
  font-weight: 600;
}

/* ==========================================================================
   Passenger Scenarios (AI & 流媒体专车指南)
   ========================================================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.scenario-card {
  background: var(--cream-card);
  border: 1px solid var(--border-brass);
  border-radius: var(--radius-md);
  padding: 1.35rem;
  box-shadow: var(--shadow-sm);
}

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

.app-badge {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--railway-green-dark);
  background: var(--cream-dark);
  padding: 0.25rem 0.5rem;
  border-radius: 3px;
  border: 1px solid var(--border-brass);
}

.scenario-card h3 {
  font-size: 1.08rem;
  margin-bottom: 0.45rem;
}

.scenario-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.scenario-tips {
  margin-top: 0.75rem;
  padding-top: 0.65rem;
  border-top: 1px dashed rgba(18, 26, 22, 0.12);
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--brass-dark);
}

/* ==========================================================================
   Railway Switch Game (铁道调度所：道岔试验模拟器)
   ========================================================================== */
.game-console {
  background: var(--iron-slate);
  border: 3px solid var(--brass);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  color: var(--cream);
  box-shadow: var(--shadow-lg), inset 0 0 20px rgba(0,0,0,0.6);
  margin-bottom: 2rem;
}

.game-console-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid rgba(181, 138, 66, 0.4);
  padding-bottom: 0.75rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.game-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--brass-light);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.game-disclaimer-box {
  background: rgba(200, 70, 56, 0.15);
  border-left: 3px solid var(--signal-red);
  padding: 0.5rem 0.85rem;
  font-size: 0.82rem;
  color: #FFAE9E;
  margin-bottom: 1.25rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.game-track-board {
  background: #0D1612;
  border: 1px solid rgba(181, 138, 66, 0.3);
  border-radius: var(--radius-sm);
  padding: 1rem;
  margin-bottom: 1.25rem;
  position: relative;
  overflow: hidden;
}

.track-canvas-svg {
  width: 100%;
  height: 180px;
  display: block;
}

.switch-controls-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.switch-unit {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(181, 138, 66, 0.35);
  border-radius: var(--radius-sm);
  padding: 0.85rem;
  text-align: center;
}

.switch-label {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--brass-light);
  margin-bottom: 0.35rem;
}

.switch-state-display {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  margin-bottom: 0.6rem;
  display: inline-block;
}

.state-normal {
  background: rgba(43, 140, 101, 0.3);
  color: #4AE4A7;
  border: 1px solid #2B8C65;
}

.state-reverse {
  background: rgba(217, 136, 38, 0.3);
  color: #FFC06A;
  border: 1px solid #D98826;
}

.switch-toggle-btn {
  width: 100%;
  background: #24352D;
  color: var(--cream);
  border: 1px solid var(--brass);
  padding: 0.45rem 0.5rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.switch-toggle-btn:hover {
  background: #31463C;
  border-color: var(--brass-light);
}

.switch-toggle-btn:active {
  transform: scale(0.98);
}

.game-actions-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.game-btn-group {
  display: flex;
  gap: 0.75rem;
}

.game-status-output {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: #FFE6A5;
  background: rgba(0, 0, 0, 0.4);
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--brass);
  flex-grow: 1;
}

/* ==========================================================================
   Pricing: Ticket-Class Comparisons (车票席位对比)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  align-items: stretch;
}

/* Vintage Ticket Card */
.ticket-card {
  background: var(--cream-paper);
  border: 2px solid var(--border-brass);
  border-radius: var(--radius-md);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  overflow: hidden;
}

.ticket-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* Perforated edge effect */
.ticket-card::before, .ticket-card::after {
  content: "";
  position: absolute;
  top: 130px;
  width: 20px;
  height: 20px;
  background-color: var(--cream);
  border-radius: 50%;
  border: 2px solid var(--border-brass);
}

.ticket-card::before { left: -11px; }
.ticket-card::after { right: -11px; }

.ticket-card.featured {
  border-color: var(--signal-red);
  background: #FFFDF9;
  box-shadow: 0 6px 20px rgba(200, 70, 56, 0.18);
  transform: scale(1.02);
}

.ticket-card.featured:hover {
  transform: scale(1.02) translateY(-4px);
}

.ticket-featured-badge {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--signal-red);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.25rem 0.85rem;
  border-bottom-left-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.ticket-header {
  border-bottom: 1px dashed var(--border-brass);
  padding-bottom: 1.25rem;
  margin-bottom: 1.25rem;
}

.ticket-class-title {
  font-size: 1.3rem;
  color: var(--railway-green-dark);
  margin-bottom: 0.25rem;
}

.ticket-code {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--brass-dark);
}

.ticket-price-box {
  margin: 1rem 0;
}

.ticket-currency {
  font-size: 1.1rem;
  color: var(--signal-red);
  font-weight: 700;
}

.ticket-price-num {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--signal-red);
  line-height: 1;
}

.ticket-billing-cycle {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.ticket-specs-list {
  list-style: none;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.ticket-specs-list li {
  padding: 0.45rem 0;
  border-bottom: 1px solid rgba(18, 26, 22, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.spec-key {
  color: var(--text-muted);
}

.spec-val-strong {
  font-weight: 600;
  color: var(--railway-green-dark);
}

.ticket-reason-box {
  background: rgba(181, 138, 66, 0.12);
  border-left: 3px solid var(--brass);
  padding: 0.5rem 0.65rem;
  font-size: 0.8rem;
  color: var(--railway-green-dark);
  margin-bottom: 1.25rem;
  border-radius: 0 4px 4px 0;
}

/* ==========================================================================
   Nine Article Cards (9大专栏文章卡片)
   Requirement: desktop 3x3, tablet 2 columns, mobile 1 column
   ========================================================================== */
.articles-grid-9 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 1024px) {
  .articles-grid-9 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 680px) {
  .articles-grid-9 {
    grid-template-columns: 1fr;
  }
}

.article-card {
  background: var(--cream-card);
  border: 1px solid var(--border-brass);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--railway-green);
}

.article-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--brass-dark);
}

.article-category-tag {
  background: rgba(24, 77, 59, 0.08);
  color: var(--railway-green);
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  font-weight: 600;
}

.article-card-title {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.article-card-title a {
  color: var(--railway-green-dark);
  text-decoration: none;
}

.article-card-title a:hover {
  color: var(--signal-red);
}

.article-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  border-top: 1px dashed var(--border-brass);
  padding-top: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-light);
}

.read-more-link {
  color: var(--railway-green);
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.read-more-link:hover {
  color: var(--signal-red);
}

/* ==========================================================================
   Testimonial Cards (旅客评价与留言簿)
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.testimonial-card {
  background: var(--cream-paper);
  border: 1px solid var(--border-brass);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.test-user-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.test-avatar {
  width: 44px;
  height: 44px;
  background: var(--railway-green);
  color: var(--cream);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.1rem;
  border: 2px solid var(--brass);
}

.test-user-info h4 {
  font-size: 1rem;
  color: var(--railway-green-dark);
  margin-bottom: 0.15rem;
}

.test-role {
  font-size: 0.78rem;
  color: var(--brass-dark);
  font-family: var(--font-mono);
}

.test-quote {
  font-size: 0.92rem;
  color: var(--text-main);
  line-height: 1.65;
  font-style: italic;
  flex-grow: 1;
}

.testimonial-compliance-note {
  background: rgba(181, 138, 66, 0.1);
  border-left: 3px solid var(--brass);
  padding: 0.65rem 1rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-family: var(--font-mono);
}

/* ==========================================================================
   Accordion FAQ (常见问题解答)
   ========================================================================== */
.faq-accordion-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.faq-item {
  background: var(--cream-card);
  border: 1px solid var(--border-brass);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-question-btn {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 1.1rem 1.25rem;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--railway-green-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: background-color 0.2s ease;
}

.faq-question-btn:hover {
  background-color: var(--cream-dark);
}

.faq-icon-cross {
  width: 20px;
  height: 20px;
  position: relative;
  flex-shrink: 0;
  transition: transform 0.25s ease;
}

.faq-icon-cross::before, .faq-icon-cross::after {
  content: "";
  position: absolute;
  background: var(--brass-dark);
}

.faq-icon-cross::before {
  top: 9px;
  left: 2px;
  width: 16px;
  height: 2px;
}

.faq-icon-cross::after {
  top: 2px;
  left: 9px;
  width: 2px;
  height: 16px;
  transition: transform 0.25s ease;
}

.faq-item.active .faq-icon-cross::after {
  transform: rotate(90deg);
  opacity: 0;
}

.faq-item.active .faq-question-btn {
  background-color: var(--cream-dark);
  border-bottom: 1px solid var(--border-brass);
}

.faq-answer-pane {
  padding: 0 1.25rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1), padding 0.3s ease;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-item.active .faq-answer-pane {
  padding: 1rem 1.25rem 1.25rem;
  max-height: 1000px;
  transition: max-height 0.3s ease-in-out, padding 0.3s ease;
}

/* ==========================================================================
   Footer (铁道总调度局底部)
   ========================================================================== */
.site-footer {
  background: var(--railway-green-dark);
  color: var(--cream);
  border-top: 4px solid var(--brass);
  padding: 3.5rem 0 2rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.footer-brand h3 {
  color: var(--cream);
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
}

.footer-brand p {
  color: #B5C4BC;
  font-size: 0.88rem;
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.footer-col h4 {
  color: var(--brass-light);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  border-bottom: 1px solid rgba(181, 138, 66, 0.3);
  padding-bottom: 0.4rem;
}

.footer-links-list {
  list-style: none;
  font-size: 0.88rem;
}

.footer-links-list li {
  margin-bottom: 0.55rem;
}

.footer-links-list a {
  color: #D6E4DC;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-links-list a:hover {
  color: var(--brass-light);
  text-decoration: underline;
}

/* Recommended Industry Reference Links (Footer links rule) */
.footer-industry-block {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(181, 138, 66, 0.25);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  margin-bottom: 2rem;
}

.footer-industry-title {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--brass-light);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-industry-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.88rem;
}

.footer-industry-links a {
  color: #E2ECE6;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.footer-industry-links a:hover {
  color: var(--brass-light);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8rem;
  color: #8E9C94;
  font-family: var(--font-mono);
}

.footer-legal-links {
  display: flex;
  gap: 1rem;
}

.footer-legal-links a {
  color: #8E9C94;
  text-decoration: none;
}

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

/* ==========================================================================
   Article Pages Specific Styles (独立文章页专有排版)
   ========================================================================== */
.article-header-hero {
  background: var(--railway-green);
  color: var(--cream);
  padding: 1.75rem 0 1.5rem;
  border-bottom: 3px solid var(--brass);
  margin-bottom: 2rem;
}

.article-header-hero h1 {
  color: var(--cream);
  font-size: clamp(1.4rem, 2.8vw, 2.1rem);
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--brass-light);
  flex-wrap: wrap;
}

.breadcrumb-nav {
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--brass-light);
}

.breadcrumb-nav a {
  color: var(--cream);
  text-decoration: none;
}

.breadcrumb-nav a:hover {
  color: var(--brass-light);
  text-decoration: underline;
}

.breadcrumb-separator {
  margin: 0 0.4rem;
  color: var(--brass);
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 2.5rem;
  align-items: start;
}

@media (max-width: 900px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
}

.article-content {
  background: var(--cream-card);
  border: 1px solid var(--border-brass);
  border-radius: var(--radius-md);
  padding: 2.25rem 2.5rem;
  box-shadow: var(--shadow-sm);
  line-height: 1.8;
  font-size: 1.02rem;
}

@media (max-width: 600px) {
  .article-content {
    padding: 1.5rem 1.25rem;
  }
}

.article-content h2 {
  font-size: 1.5rem;
  color: var(--railway-green-dark);
  margin-top: 2.2rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--brass);
  padding-bottom: 0.4rem;
}

.article-content h3 {
  font-size: 1.22rem;
  color: var(--railway-green);
  margin-top: 1.6rem;
  margin-bottom: 0.75rem;
}

.article-content ul, .article-content ol {
  margin-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.article-content li {
  margin-bottom: 0.45rem;
}

.article-content blockquote {
  background: rgba(181, 138, 66, 0.1);
  border-left: 4px solid var(--brass);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  font-style: italic;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.article-content code {
  font-family: var(--font-mono);
  background: var(--cream-dark);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  font-size: 0.88em;
  color: var(--signal-red-dark);
  border: 1px solid rgba(18, 26, 22, 0.08);
}

.article-content pre {
  background: var(--iron-slate);
  color: #D6E4DC;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 1.25rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--brass);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.92rem;
}

.article-content th, .article-content td {
  border: 1px solid var(--border-brass);
  padding: 0.65rem 0.85rem;
  text-align: left;
}

.article-content th {
  background: var(--cream-dark);
  color: var(--railway-green-dark);
  font-family: var(--font-serif);
}

/* Article CTA Inset Box */
.article-cta-box {
  background: linear-gradient(135deg, #184D3B 0%, #0F3327 100%);
  border: 2px solid var(--brass);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  color: var(--cream);
  text-align: center;
  margin: 2.5rem 0;
  box-shadow: var(--shadow-md);
}

.article-cta-box h3 {
  color: var(--brass-light);
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

.article-cta-box p {
  color: #D6E4DC;
  font-size: 0.94rem;
  margin-bottom: 1.25rem;
}

/* Article Sidebar */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  position: sticky;
  top: 90px;
}

.sidebar-widget {
  background: var(--cream-card);
  border: 1px solid var(--border-brass);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.sidebar-widget h4 {
  font-size: 1.05rem;
  color: var(--railway-green-dark);
  border-bottom: 2px solid var(--brass);
  padding-bottom: 0.4rem;
  margin-bottom: 0.85rem;
}

.related-articles-list {
  list-style: none;
  font-size: 0.9rem;
}

.related-articles-list li {
  margin-bottom: 0.65rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px dashed rgba(18, 26, 22, 0.08);
}

.related-articles-list li:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.related-articles-list a {
  color: var(--railway-green-dark);
  text-decoration: none;
  font-weight: 500;
  line-height: 1.4;
  display: block;
}

.related-articles-list a:hover {
  color: var(--signal-red);
}

/* ==========================================================================
   Responsive Utilities & Media Queries
   ========================================================================== */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 820px) {
  .nav-list {
    display: none;
  }

  .mobile-nav-toggle {
    display: block;
  }

  .mobile-nav-drawer {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--railway-green-dark);
    border-bottom: 3px solid var(--brass);
    box-shadow: 0 10px 25px rgba(0,0,0,0.4);
    padding: 1.25rem 1.5rem;
  }

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

  .mobile-nav-drawer ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
  }

  .mobile-nav-drawer .nav-link {
    font-size: 1.05rem;
    padding: 0.4rem 0;
    display: block;
  }

  .mobile-nav-drawer .btn-cta {
    margin-top: 1rem;
    width: 100%;
  }

  .service-row-card {
    grid-template-columns: 1fr;
    gap: 0.85rem;
    padding: 1.25rem;
  }

  .service-code {
    display: inline-block;
    width: auto;
    padding: 0.25rem 0.75rem;
  }

  .switch-controls-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 580px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn-cta {
    width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ==========================================================================
   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;
  }
}