/* ===================================================================
   赔钱机场 (BRAND_NAME) - 热敏收据极简风 (Thermal Receipt Minimalist)
   - 核心美学：热敏纸张质感、微距打孔撕裂线、复古深碳黑油墨、朱红印章标记
   - 纯原生 CSS，零重型框架，秒级极速渲染
   - 默认白天模式 (Warm Off-white #f6f6f4)，平滑无缝昼夜切换
   - 移动端单栏全适配，手指触控优化
   =================================================================== */

:root {
  /* 热敏收据调色板 - 浅色模式 (Default Warm Receipt Canvas) */
  --bg-canvas: #f6f6f4;
  --bg-paper: #ffffff;
  --bg-paper-subtle: #f0f0ec;
  --bg-paper-alt: #ecece7;
  --bg-nav: rgba(246, 246, 244, 0.9);

  --ink-primary: #121316;
  --ink-secondary: #3b3d44;
  --ink-muted: #6e717b;
  --ink-faint: #9ea1ac;
  --ink-inverse: #f6f6f4;

  --crimson-stamp: #dc2626;
  --crimson-glow: rgba(220, 38, 38, 0.12);
  --crimson-subtle: rgba(220, 38, 38, 0.05);

  --line-perforated: #d1d1cd;
  --line-solid: #e2e2dc;
  --line-dark: #121316;

  --accent-success: #15803d;
  --accent-success-bg: rgba(21, 128, 61, 0.1);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --shadow-receipt: 0 4px 18px rgba(18, 19, 22, 0.06), 0 1px 3px rgba(18, 19, 22, 0.04);
  --shadow-lift: 0 14px 34px rgba(18, 19, 22, 0.09), 0 3px 8px rgba(18, 19, 22, 0.05);

  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --nav-height: 68px;
  --container-max: 1160px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* 深色模式 - 碳墨暗室纸张 (Dark Carbon Inked Canvas) */
[data-theme="dark"] {
  --bg-canvas: #0f1013;
  --bg-paper: #17181c;
  --bg-paper-subtle: #1e1f25;
  --bg-paper-alt: #26272f;
  --bg-nav: rgba(15, 16, 19, 0.9);

  --ink-primary: #f2f2ee;
  --ink-secondary: #c7c8cb;
  --ink-muted: #8e9099;
  --ink-faint: #565861;
  --ink-inverse: #0f1013;

  --crimson-stamp: #ef4444;
  --crimson-glow: rgba(239, 68, 68, 0.22);
  --crimson-subtle: rgba(239, 68, 68, 0.08);

  --line-perforated: #2f313a;
  --line-solid: #262830;
  --line-dark: #f2f2ee;

  --shadow-receipt: 0 4px 20px rgba(0, 0, 0, 0.45);
  --shadow-lift: 0 14px 36px rgba(0, 0, 0, 0.6);
}

/* ===================================================================
   基础排版与重置
   =================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 18px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-canvas);
  color: var(--ink-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  background-image: radial-gradient(var(--line-perforated) 1px, transparent 1px);
  background-size: 28px 28px;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.mono {
  font-family: var(--font-mono);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ===================================================================
   印章与打孔撕裂线特效 (Stamp & Perforation Textures)
   =================================================================== */
.crimson-stamp-badge {
  display: inline-block;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 800;
  color: var(--crimson-stamp);
  border: 1.5px solid var(--crimson-stamp);
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  transform: rotate(-3deg);
  background: var(--crimson-subtle);
  user-select: none;
}

.perforated-line {
  width: 100%;
  height: 0;
  border-top: 2px dashed var(--line-perforated);
  margin: 20px 0;
  position: relative;
}

.perforated-line::before,
.perforated-line::after {
  content: '';
  position: absolute;
  top: -8px;
  width: 14px;
  height: 14px;
  background-color: var(--bg-canvas);
  border-radius: 50%;
}
.perforated-line::before { left: -26px; }
.perforated-line::after { right: -26px; }

/* 锯齿打孔底边缘 (Jagged Tear-Off Bottom) */
.jagged-bottom {
  position: relative;
}
.jagged-bottom::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  right: 0;
  height: 10px;
  background: radial-gradient(circle at bottom, transparent 6px, var(--bg-paper) 6px) repeat-x;
  background-size: 16px 10px;
  transform: rotate(180deg);
}

/* 条形码图形 (Pure CSS Barcode) */
.barcode-strip {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 2.5px;
  height: 38px;
  padding: 4px 0;
  opacity: 0.85;
}
.barcode-strip span {
  background-color: var(--ink-primary);
  display: inline-block;
  height: 100%;
}
.barcode-number {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
  letter-spacing: 0.28em;
  margin-top: 4px;
}

/* ===================================================================
   顶栏导航 (Navbar)
   =================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--nav-height);
  background-color: var(--bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1.5px solid var(--line-perforated);
  transition: all var(--transition-normal);
}

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

.brand-block {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 850;
  letter-spacing: -0.02em;
  color: var(--ink-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-receipt-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background-color: var(--ink-primary);
  color: var(--ink-inverse);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  font-weight: 700;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink-secondary);
  padding: 6px 4px;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--ink-primary);
}

.nav-link:hover::after, .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--crimson-stamp);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 昼夜切换按钮 - 精致专业化透明按键 */
.theme-toggle-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-paper);
  border: 1px solid var(--line-perforated);
  color: var(--ink-secondary);
  transition: all var(--transition-normal);
  position: relative;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.theme-toggle-btn:hover {
  background: var(--bg-paper-subtle);
  color: var(--ink-primary);
  border-color: var(--ink-primary);
  transform: translateY(-1px);
}

.theme-toggle-icon {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  transition: transform 0.35s ease;
}

.theme-icon-sun { display: block; }
.theme-icon-moon { display: none; }

[data-theme="dark"] .theme-icon-sun { display: none; }
[data-theme="dark"] .theme-icon-moon { display: block; }

.mobile-menu-btn {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-perforated);
  background: var(--bg-paper);
  color: var(--ink-primary);
  align-items: center;
  justify-content: center;
}

/* ===================================================================
   按钮通用样式 (Buttons)
   =================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
  white-space: nowrap;
  line-height: 1.2;
}

.btn-primary {
  background-color: var(--ink-primary);
  color: var(--ink-inverse);
  border: 1.5px solid var(--ink-primary);
  box-shadow: 0 2px 6px rgba(18, 19, 22, 0.15);
}

.btn-primary:hover {
  background-color: var(--crimson-stamp);
  border-color: var(--crimson-stamp);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--crimson-glow);
}

.btn-secondary {
  background-color: var(--bg-paper);
  color: var(--ink-primary);
  border: 1.5px solid var(--line-perforated);
}

.btn-secondary:hover {
  background-color: var(--bg-paper-subtle);
  border-color: var(--ink-primary);
  transform: translateY(-1px);
}

.btn-stamp {
  background-color: var(--crimson-stamp);
  color: #ffffff;
  border: 1.5px solid var(--crimson-stamp);
  box-shadow: 0 3px 10px var(--crimson-glow);
}

.btn-stamp:hover {
  background-color: #b91c1c;
  border-color: #b91c1c;
  transform: translateY(-1px);
}

.btn-sm {
  padding: 7px 16px;
  font-size: 0.86rem;
}

.btn-lg {
  padding: 13px 28px;
  font-size: 1.05rem;
}

/* ===================================================================
   Hero 主视觉区 (Hero Editorial & Ledger Centerpiece)
   =================================================================== */
.hero-section {
  padding: 64px 0 54px 0;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-editorial {
  display: flex;
  flex-direction: column;
}

.hero-meta-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.antenna-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-success);
  background-color: var(--accent-success-bg);
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  border: 1px solid rgba(21, 128, 61, 0.2);
}

.antenna-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-success);
  animation: antenna-pulse 1.8s infinite;
}

@keyframes antenna-pulse {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

.hero-headline {
  font-size: 2.85rem;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
  color: var(--ink-primary);
}

.hero-headline .highlight-brand {
  position: relative;
  display: inline-block;
  color: var(--crimson-stamp);
}

.hero-intro {
  font-size: 1.12rem;
  color: var(--ink-secondary);
  line-height: 1.75;
  margin-bottom: 32px;
  border-left: 3px solid var(--crimson-stamp);
  padding-left: 16px;
}

.hero-cta-box {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.hero-metrics-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 24px;
  border-top: 1.5px dashed var(--line-perforated);
}

.metric-cell h4 {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--ink-primary);
  line-height: 1.1;
}

.metric-cell p {
  font-size: 0.82rem;
  color: var(--ink-muted);
  margin-top: 4px;
}

/* ===================================================================
   中央热敏收据核心卡片 (Thermal Receipt Centerpiece)
   =================================================================== */
.receipt-wrapper {
  perspective: 1000px;
}

.receipt-card {
  background: var(--bg-paper);
  border: 1.5px solid var(--line-perforated);
  border-radius: var(--radius-sm);
  padding: 32px 28px;
  box-shadow: var(--shadow-receipt);
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  cursor: grab;
}

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

.receipt-card.drag-active {
  transform: translateY(12px) scale(0.99);
  cursor: grabbing;
}

.receipt-header-receipt {
  text-align: center;
  border-bottom: 1.5px dashed var(--line-perforated);
  padding-bottom: 18px;
  margin-bottom: 20px;
}

.receipt-brand-mark {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.receipt-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
  display: flex;
  justify-content: center;
  gap: 12px;
}

/* 明细账单行 (Ledger Rows) */
.receipt-ledger {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.ledger-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 6px 8px;
  border-radius: var(--radius-xs);
  transition: background-color var(--transition-fast);
  font-size: 0.94rem;
}

/* 悬浮灰红透光微高亮 */
.ledger-row:hover {
  background-color: var(--crimson-subtle);
}

.ledger-item-name {
  color: var(--ink-secondary);
  font-weight: 500;
}

.ledger-dots {
  flex-grow: 1;
  border-bottom: 1.5px dotted var(--line-perforated);
  margin: 0 8px;
  height: 1px;
}

.ledger-item-price {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--ink-primary);
}

.ledger-subsidized {
  color: var(--crimson-stamp);
}

/* 补贴切换控制开关 (Clean Hardware Toggle) */
.hardware-toggle-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-paper-subtle);
  border: 1px solid var(--line-perforated);
  padding: 10px 14px;
  border-radius: var(--radius-xs);
  margin: 18px 0;
}

.hardware-toggle-title {
  font-size: 0.88rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}

.hardware-toggle-switch {
  width: 38px;
  height: 22px;
  background-color: var(--accent-success);
  border-radius: 999px;
  position: relative;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.hardware-toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  right: 2px;
  width: 18px;
  height: 18px;
  background-color: #ffffff;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

/* 结算总额区 */
.receipt-total-bar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 14px 8px;
  border-top: 2px solid var(--ink-primary);
  border-bottom: 2px solid var(--ink-primary);
  margin-bottom: 24px;
}

.receipt-total-label {
  font-weight: 850;
  font-size: 1.05rem;
}

.receipt-total-price {
  font-family: var(--font-mono);
  font-size: 2.1rem;
  font-weight: 900;
  color: var(--crimson-stamp);
  letter-spacing: -0.04em;
}

.receipt-total-price span {
  font-size: 1.15rem;
}

/* 撕裂微动效按钮 (Tear-off micro-interaction) */
.tear-btn-container {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xs);
}

.tear-btn {
  width: 100%;
  padding: 14px 20px;
  font-weight: 800;
  font-size: 1.05rem;
  position: relative;
  z-index: 2;
  transition: all 0.25s ease;
}

.tear-btn.tearing {
  transform: translateX(4px);
  background-color: var(--accent-success);
  border-color: var(--accent-success);
}

.receipt-stamp-overlay {
  position: absolute;
  right: 24px;
  bottom: 110px;
  pointer-events: none;
}

.stamp-round {
  width: 82px;
  height: 82px;
  border: 2.5px solid var(--crimson-stamp);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--crimson-stamp);
  font-weight: 900;
  font-size: 0.85rem;
  transform: rotate(-14deg);
  opacity: 0.88;
  background-color: var(--crimson-subtle);
  line-height: 1.1;
  text-align: center;
}

/* ===================================================================
   核心优势卡片 (3 Transparent Value Breakdown Cards)
   =================================================================== */
.section {
  padding: 72px 0;
}

.section-editorial-header {
  margin-bottom: 48px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  border-bottom: 2px solid var(--ink-primary);
  padding-bottom: 16px;
  flex-wrap: wrap;
  gap: 16px;
}

.section-num {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--crimson-stamp);
  display: block;
  margin-bottom: 4px;
}

.section-heading {
  font-size: 2.1rem;
  font-weight: 850;
  letter-spacing: -0.02em;
  color: var(--ink-primary);
}

.section-summary {
  font-size: 0.95rem;
  color: var(--ink-muted);
  max-width: 480px;
}

.features-receipt-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-receipt-card {
  background: var(--bg-paper);
  border: 1.5px solid var(--line-perforated);
  border-radius: var(--radius-sm);
  padding: 32px 24px;
  box-shadow: var(--shadow-receipt);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-fast);
}

.feature-receipt-card:hover {
  border-color: var(--ink-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.card-stamp-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--crimson-stamp);
  margin-bottom: 14px;
}

.feature-card-heading {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--ink-primary);
}

.feature-card-content {
  font-size: 0.96rem;
  color: var(--ink-secondary);
  line-height: 1.7;
  flex-grow: 1;
  margin-bottom: 20px;
}

.feature-card-footer {
  border-top: 1.5px dashed var(--line-perforated);
  padding-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
}

/* ===================================================================
   流媒体 & AI 工具支持图卡 (Showcase Cards)
   =================================================================== */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.showcase-receipt-card {
  background: var(--bg-paper);
  border: 1.5px solid var(--line-perforated);
  border-radius: var(--radius-sm);
  padding: 32px 28px;
  box-shadow: var(--shadow-receipt);
  position: relative;
  transition: all var(--transition-fast);
}

.showcase-receipt-card:hover {
  border-color: var(--ink-primary);
}

.showcase-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  margin-bottom: 16px;
}

.showcase-badge.stream {
  background-color: rgba(220, 38, 38, 0.1);
  color: var(--crimson-stamp);
  border: 1px solid rgba(220, 38, 38, 0.25);
}

.showcase-badge.ai {
  background-color: var(--accent-success-bg);
  color: var(--accent-success);
  border: 1px solid rgba(21, 128, 61, 0.25);
}

.showcase-title {
  font-size: 1.45rem;
  font-weight: 850;
  margin-bottom: 10px;
  color: var(--ink-primary);
}

.showcase-desc {
  font-size: 0.95rem;
  color: var(--ink-secondary);
  line-height: 1.65;
  margin-bottom: 22px;
}

.showcase-items-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin-bottom: 20px;
}

.showcase-items-table td {
  padding: 10px 8px;
  border-bottom: 1px solid var(--line-perforated);
}

.showcase-items-table tr:hover td {
  background-color: var(--crimson-subtle);
}

.status-check {
  font-family: var(--font-mono);
  color: var(--accent-success);
  font-weight: 700;
  text-align: right;
}

/* ===================================================================
   清晰套餐价格对比表 (Tear-Off Fare Matrix)
   =================================================================== */
.fare-matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.fare-ticket-card {
  background: var(--bg-paper);
  border: 1.5px solid var(--line-perforated);
  border-radius: var(--radius-sm);
  padding: 32px 26px 40px 26px;
  box-shadow: var(--shadow-receipt);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.fare-ticket-card:hover {
  transform: translateY(-5px);
  border-color: var(--ink-primary);
  box-shadow: var(--shadow-lift);
}

.fare-ticket-card.popular {
  border: 2px solid var(--crimson-stamp);
}

.ticket-tag-pop {
  position: absolute;
  top: -12px;
  left: 24px;
  background-color: var(--crimson-stamp);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 800;
  padding: 2px 10px;
  border-radius: var(--radius-xs);
  letter-spacing: 0.04em;
}

.ticket-top {
  border-bottom: 1.5px dashed var(--line-perforated);
  padding-bottom: 18px;
  margin-bottom: 20px;
}

.ticket-name {
  font-size: 1.35rem;
  font-weight: 850;
  color: var(--ink-primary);
  margin-bottom: 6px;
}

.ticket-subtitle {
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.ticket-price-box {
  display: flex;
  align-items: baseline;
  gap: 2px;
  margin: 14px 0 6px 0;
}

.ticket-currency {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ink-primary);
}

.ticket-amount {
  font-family: var(--font-mono);
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--ink-primary);
  line-height: 1;
}

.ticket-cycle {
  font-size: 0.88rem;
  color: var(--ink-muted);
  margin-left: 4px;
}

.ticket-specs-list {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 26px;
}

.ticket-spec-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.92rem;
  color: var(--ink-secondary);
  padding: 4px 0;
  border-bottom: 1px dotted var(--line-perforated);
}

.ticket-spec-row:hover {
  background-color: var(--crimson-subtle);
}

.ticket-spec-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--ink-primary);
}

.fare-ticket-card .btn {
  width: 100%;
}

/* ===================================================================
   用户评价 (Testimonials / Customer Ledger Log)
   =================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-receipt-card {
  background: var(--bg-paper);
  border: 1.5px solid var(--line-perforated);
  border-radius: var(--radius-sm);
  padding: 26px 22px;
  box-shadow: var(--shadow-receipt);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.review-receipt-card:hover {
  border-color: var(--ink-primary);
}

.review-stars {
  font-family: var(--font-mono);
  color: var(--crimson-stamp);
  font-size: 0.82rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--ink-secondary);
  margin-bottom: 20px;
  flex-grow: 1;
}

.review-meta-bar {
  border-top: 1.5px dashed var(--line-perforated);
  padding-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
}

.reviewer-name {
  font-weight: 750;
  color: var(--ink-primary);
}

.reviewer-role {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
}

/* ===================================================================
   常见问题解答 (FAQ)
   =================================================================== */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-receipt-item {
  background: var(--bg-paper);
  border: 1.5px solid var(--line-perforated);
  border-radius: var(--radius-xs);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-receipt-item:hover {
  border-color: var(--ink-primary);
}

.faq-receipt-header {
  width: 100%;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-size: 1.02rem;
  font-weight: 750;
  color: var(--ink-primary);
  background: var(--bg-paper);
}

.faq-receipt-header:hover {
  color: var(--crimson-stamp);
}

.faq-arrow {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  transition: transform var(--transition-fast);
}

.faq-receipt-item.active .faq-arrow {
  transform: rotate(90deg);
  color: var(--crimson-stamp);
}

.faq-receipt-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.faq-receipt-item.active .faq-receipt-body {
  max-height: 400px;
}

.faq-receipt-content {
  padding: 0 22px 20px 22px;
  border-top: 1.5px dashed var(--line-perforated);
  padding-top: 16px;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--ink-secondary);
}

/* ===================================================================
   全站通知提示 (Toast)
   =================================================================== */
.toast-notice {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: var(--ink-primary);
  color: var(--ink-inverse);
  padding: 12px 24px;
  border-radius: var(--radius-xs);
  font-size: 0.92rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  border: 1px solid var(--line-perforated);
  z-index: 2000;
  transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  pointer-events: none;
}

.toast-notice.show {
  transform: translateX(-50%) translateY(0);
}

/* ===================================================================
   页脚 (Footer - 严格遵循只保留四个标题规范)
   =================================================================== */
.site-footer {
  background-color: var(--bg-paper);
  border-top: 2px solid var(--ink-primary);
  padding: 44px 0 36px 0;
  margin-top: 40px;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--ink-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  position: relative;
}

.footer-link:hover {
  color: var(--crimson-stamp);
  background-color: var(--crimson-subtle);
}

.footer-divider-perforated {
  width: 100%;
  max-width: 600px;
  height: 0;
  border-top: 1.5px dashed var(--line-perforated);
  margin: 0 auto 20px auto;
}

.footer-bottom {
  text-align: center;
  font-size: 0.84rem;
  color: var(--ink-muted);
}

.footer-bottom a {
  color: var(--ink-primary);
  font-weight: 700;
}

.footer-bottom a:hover {
  color: var(--crimson-stamp);
  text-decoration: underline;
}

/* ===================================================================
   独立子页面通用排版 (About, Terms, Privacy, Sitemap, Insights)
   =================================================================== */
.page-hero {
  padding: 48px 0 32px 0;
  border-bottom: 1.5px dashed var(--line-perforated);
  margin-bottom: 40px;
  text-align: center;
}

.page-title {
  font-size: 2.3rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
  color: var(--ink-primary);
}

.page-subtitle {
  font-size: 1.05rem;
  color: var(--ink-muted);
}

.page-article-container {
  max-width: 860px;
  margin: 0 auto 60px auto;
  background: var(--bg-paper);
  border: 1.5px solid var(--line-perforated);
  border-radius: var(--radius-sm);
  padding: 44px 38px;
  box-shadow: var(--shadow-receipt);
}

.article-prose h2 {
  font-size: 1.45rem;
  font-weight: 850;
  color: var(--ink-primary);
  margin: 32px 0 14px 0;
  padding-bottom: 8px;
  border-bottom: 1.5px solid var(--ink-primary);
}

.article-prose h2:first-child {
  margin-top: 0;
}

.article-prose h3 {
  font-size: 1.15rem;
  font-weight: 800;
  margin: 22px 0 10px 0;
  color: var(--ink-primary);
}

.article-prose p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--ink-secondary);
  margin-bottom: 16px;
}

.article-prose ul {
  padding-left: 20px;
  margin-bottom: 20px;
}

.article-prose li {
  list-style: square;
  line-height: 1.8;
  color: var(--ink-secondary);
  margin-bottom: 8px;
}

.receipt-alert-box {
  background-color: var(--crimson-subtle);
  border-left: 3.5px solid var(--crimson-stamp);
  padding: 16px 20px;
  margin: 22px 0;
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
}

.receipt-alert-box p {
  margin-bottom: 0;
  color: var(--ink-primary);
  font-weight: 600;
}

/* 资讯列表网格 */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.insight-card {
  background: var(--bg-paper);
  border: 1.5px solid var(--line-perforated);
  border-radius: var(--radius-sm);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

.insight-card:hover {
  border-color: var(--ink-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.insight-card-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--crimson-stamp);
  margin-bottom: 10px;
  font-weight: 700;
}

.insight-card-title {
  font-size: 1.22rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--ink-primary);
  line-height: 1.4;
}

.insight-card-snippet {
  font-size: 0.92rem;
  color: var(--ink-secondary);
  line-height: 1.65;
  margin-bottom: 16px;
  flex-grow: 1;
}

.insight-card-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--ink-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.insight-card:hover .insight-card-link {
  color: var(--crimson-stamp);
}

/* ===================================================================
   响应式媒体查询 (Mobile Responsiveness)
   =================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .features-receipt-grid {
    grid-template-columns: 1fr;
  }
  .showcase-grid {
    grid-template-columns: 1fr;
  }
  .fare-matrix-grid {
    grid-template-columns: 1fr;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .insights-grid {
    grid-template-columns: 1fr;
  }
}

/* ===================================================================
   SEO 深度长文专属样式 (Article TOC, Breadcrumbs, Related Reading)
   =================================================================== */
.article-breadcrumbs {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-muted);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.article-breadcrumbs a {
  color: var(--ink-secondary);
  font-weight: 600;
}

.article-breadcrumbs a:hover {
  color: var(--crimson-stamp);
}

.article-toc {
  background-color: var(--bg-paper-subtle);
  border: 1.5px dashed var(--line-perforated);
  border-radius: var(--radius-xs);
  padding: 22px 26px;
  margin: 28px 0 36px 0;
}

.article-toc-title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 850;
  color: var(--ink-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-toc-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 0 !important;
}

.article-toc-list li {
  list-style: none !important;
  margin-bottom: 0 !important;
  font-size: 0.92rem;
}

.article-toc-list a {
  color: var(--ink-secondary);
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
}

.article-toc-list a:hover {
  color: var(--crimson-stamp);
  transform: translateX(4px);
}

.toc-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--crimson-stamp);
}

.data-table-receipt {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.92rem;
}

.data-table-receipt th {
  background-color: var(--bg-paper-subtle);
  color: var(--ink-primary);
  text-align: left;
  padding: 12px 14px;
  border-bottom: 2px solid var(--ink-primary);
  font-weight: 800;
}

.data-table-receipt td {
  padding: 12px 14px;
  border-bottom: 1px dashed var(--line-perforated);
  color: var(--ink-secondary);
}

.data-table-receipt tr:hover td {
  background-color: var(--crimson-subtle);
}

.related-reading-box {
  margin-top: 48px;
  border-top: 2px solid var(--ink-primary);
  padding-top: 28px;
}

.related-reading-heading {
  font-size: 1.35rem;
  font-weight: 850;
  margin-bottom: 20px;
  color: var(--ink-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.related-item-card {
  background: var(--bg-paper-subtle);
  border: 1px solid var(--line-perforated);
  border-radius: var(--radius-xs);
  padding: 18px 20px;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
}

.related-item-card:hover {
  border-color: var(--ink-primary);
  background: var(--bg-paper);
  transform: translateY(-2px);
}

.related-item-tag {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--crimson-stamp);
  margin-bottom: 6px;
}

.related-item-title {
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--ink-primary);
  line-height: 1.45;
  margin-bottom: 8px;
}

.related-item-desc {
  font-size: 0.86rem;
  color: var(--ink-muted);
  line-height: 1.55;
  flex-grow: 1;
}

@media (max-width: 992px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
}


@media (max-width: 768px) {
  .site-header {
    height: 60px;
  }

  .nav-links {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-paper);
    border-bottom: 2px solid var(--ink-primary);
    padding: 20px 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    display: none;
    box-shadow: var(--shadow-lift);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero-headline {
    font-size: 2.15rem;
  }

  .hero-intro {
    font-size: 1rem;
    margin-bottom: 24px;
  }

  .hero-metrics-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .page-article-container {
    padding: 26px 18px;
  }

  .footer-nav {
    flex-direction: column;
    gap: 12px;
  }

  .btn {
    width: 100%;
    min-height: 48px;
  }

  .nav-actions .btn {
    width: auto;
    padding: 6px 14px;
    font-size: 0.85rem;
  }
}