/* ==========================================================================
   PEIQIAN AIRPORT (赔钱机场) - ACCOUNTING DEFICIT & MONOSPACE LEDGER THEME
   Primary Color Palette:
   - Paper Background: #F4F1EA (Yellowed Ledger Paper)
   - Ledger Lines: #E2DDD2
   - Ink Black: #181716
   - Deficit Crimson Red: #D32F2F / #FF3B30 (Negative Profit Highlight)
   - Profit Green (Break-even): #00A86B
   - Audit Stamp Border: #D32F2F
   - Receipt Card Shadow: 4px 4px 0px #181716
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,300;0,400;0,600;0,800;1,400&family=Noto+Sans+SC:wght@400;500;700;900&display=swap');

:root {
  --bg-paper: #F4F1EA;
  --bg-paper-dark: #EAE5D9;
  --bg-card: #FAF8F5;
  --text-main: #181716;
  --text-muted: #625E56;
  --color-red: #D32F2F;
  --color-bright-red: #FF2A2A;
  --color-green: #00A86B;
  --color-yellow: #FFD600;
  --color-highlight: #FFE082;
  --border-dark: #181716;
  --font-mono: 'JetBrains Mono', 'Courier New', Courier, monospace;
  --font-sans: 'Noto Sans SC', sans-serif;
  --shadow-hard: 4px 4px 0px #181716;
  --shadow-hard-lg: 6px 6px 0px #181716;
}

/* Base resets & typography */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-paper);
  background-image: 
    linear-gradient(var(--bg-paper-dark) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-paper-dark) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--text-main);
  font-family: var(--font-mono);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: var(--text-main);
  text-decoration: none;
  transition: all 0.15s ease;
}

/* Header & Marquee Notice */
.ticker-bar {
  background-color: var(--border-dark);
  color: #FFFFFF;
  font-size: 0.85rem;
  padding: 6px 0;
  overflow: hidden;
  white-space: nowrap;
  border-bottom: 2px solid var(--border-dark);
}

.ticker-content {
  display: inline-block;
  animation: ticker 35s linear infinite;
}

.ticker-item {
  display: inline-block;
  margin-right: 45px;
}

.ticker-item .red {
  color: var(--color-bright-red);
  font-weight: bold;
}

@keyframes ticker {
  0% { transform: translate3d(0, 0, 0); }
  100% { transform: translate3d(-50%, 0, 0); }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-paper);
  border-bottom: 3px solid var(--border-dark);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-badge {
  background-color: var(--color-red);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 3px 8px;
  border: 1px solid var(--border-dark);
  letter-spacing: 1px;
}

.logo-text {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.logo-subtext {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
}

.nav-menu {
  display: flex;
  gap: 20px;
  align-items: center;
  list-style: none;
}

.nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  padding: 6px 10px;
  border: 2px solid transparent;
}

.nav-link:hover {
  border-color: var(--border-dark);
  background-color: var(--color-yellow);
  box-shadow: 2px 2px 0px var(--border-dark);
}

.btn-header-cta {
  background-color: var(--color-yellow);
  color: var(--border-dark);
  font-weight: 800;
  font-size: 0.95rem;
  padding: 8px 18px;
  border: 2px solid var(--border-dark);
  box-shadow: var(--shadow-hard);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-header-cta:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard-lg);
  background-color: #FFEA00;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: 2px solid var(--border-dark);
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-weight: bold;
  cursor: pointer;
}

/* Common Layout Sections */
.section {
  padding: 60px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title-wrap {
  margin-bottom: 40px;
  border-bottom: 2px dashed var(--border-dark);
  padding-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 15px;
}

.section-tag {
  color: var(--color-red);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -1px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 600px;
}

/* Stamp Graphic Component */
.audit-stamp {
  display: inline-block;
  border: 3px dashed var(--color-red);
  color: var(--color-red);
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 2px;
  transform: rotate(-8deg);
  border-radius: 4px;
  text-transform: uppercase;
  user-select: none;
}

.audit-stamp.verified {
  border-style: double;
  border-width: 4px;
}

/* Hero Section */
.hero-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 40px 0 60px 0;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-meta-badge {
  display: flex;
  align-items: center;
  gap: 12px;
}

.deficit-live-pill {
  background-color: rgba(211, 47, 47, 0.1);
  border: 1px solid var(--color-red);
  color: var(--color-red);
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 700;
}

.hero-title {
  font-size: 2.6rem;
  line-height: 1.25;
  font-weight: 800;
}

.hero-title span.highlight-red {
  color: var(--color-red);
  background-color: rgba(211, 47, 47, 0.08);
  padding: 0 4px;
}

.hero-lead {
  font-size: 1.05rem;
  color: var(--text-muted);
  border-left: 3px solid var(--border-dark);
  padding-left: 15px;
}

.hero-stats-box {
  background-color: var(--bg-card);
  border: 2px solid var(--border-dark);
  padding: 20px;
  box-shadow: var(--shadow-hard);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

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

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 800;
}

.stat-value.red {
  color: var(--color-red);
}

.hero-cta-group {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.btn-primary {
  background-color: var(--color-yellow);
  color: var(--border-dark);
  font-weight: 800;
  font-size: 1.1rem;
  padding: 14px 28px;
  border: 3px solid var(--border-dark);
  box-shadow: var(--shadow-hard);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: all 0.15s ease;
}

.btn-primary:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-hard-lg);
  background-color: #FFEA00;
}

.btn-secondary {
  background-color: #FFFFFF;
  color: var(--border-dark);
  font-weight: 700;
  font-size: 1rem;
  padding: 14px 24px;
  border: 3px solid var(--border-dark);
  box-shadow: var(--shadow-hard);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-secondary:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-hard-lg);
  background-color: #F0F0F0;
}

/* Hero Ledger Image Frame */
.hero-visual-frame {
  position: relative;
  border: 3px solid var(--border-dark);
  background-color: var(--bg-card);
  padding: 12px;
  box-shadow: var(--shadow-hard-lg);
}

.hero-visual-frame img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--border-dark);
}

.barcode-strip {
  margin-top: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.barcode-visual {
  font-family: 'Courier New', monospace;
  letter-spacing: 3px;
  font-weight: 900;
  font-size: 1.1rem;
}

/* Cost Breakdown Ledger Table Section */
.ledger-table-wrapper {
  background-color: var(--bg-card);
  border: 3px solid var(--border-dark);
  box-shadow: var(--shadow-hard);
  padding: 24px;
  margin-bottom: 40px;
  position: relative;
}

.ledger-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 15px;
  font-size: 0.95rem;
}

.ledger-table th, 
.ledger-table td {
  border: 1px solid var(--border-dark);
  padding: 12px 16px;
  text-align: left;
}

.ledger-table th {
  background-color: var(--bg-paper-dark);
  font-weight: 800;
  font-size: 0.85rem;
}

.ledger-table td.negative {
  color: var(--color-red);
  font-weight: 700;
}

.ledger-summary-banner {
  margin-top: 20px;
  background-color: rgba(211, 47, 47, 0.08);
  border: 2px dashed var(--color-red);
  padding: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.summary-title {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--color-red);
}

/* Ripped Ticket Pricing Cards Section */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;
}

.receipt-card {
  background-color: #FFFFFF;
  border: 3px solid var(--border-dark);
  box-shadow: var(--shadow-hard);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.2s ease;
}

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

.receipt-card.popular {
  border-color: var(--border-dark);
  background-color: #FFFDF0;
}

.popular-ribbon {
  position: absolute;
  top: -14px;
  right: 15px;
  background-color: var(--color-red);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 10px;
  border: 2px solid var(--border-dark);
  box-shadow: 2px 2px 0px var(--border-dark);
}

.receipt-header {
  padding: 20px;
  border-bottom: 2px dashed var(--border-dark);
}

.receipt-tier {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 700;
}

.receipt-name {
  font-size: 1.6rem;
  font-weight: 800;
  margin: 4px 0 8px 0;
}

.receipt-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 40px;
}

.receipt-price-box {
  padding: 16px 20px;
  background-color: var(--bg-paper);
  border-bottom: 2px dashed var(--border-dark);
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-red);
}

.price-num {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--color-red);
  line-height: 1;
}

.price-period {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.receipt-features {
  padding: 20px;
  flex: 1;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 0.9rem;
}

.receipt-features li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.receipt-features li .check {
  color: var(--color-green);
  font-weight: 800;
}

.receipt-footer {
  padding: 20px;
  border-top: 2px dashed var(--border-dark);
}

.btn-ticket-cta {
  width: 100%;
  background-color: var(--color-yellow);
  color: var(--border-dark);
  font-weight: 800;
  font-size: 1rem;
  padding: 12px;
  border: 2px solid var(--border-dark);
  box-shadow: 2px 2px 0px var(--border-dark);
  text-align: center;
  display: block;
}

.btn-ticket-cta:hover {
  background-color: #FFEA00;
  box-shadow: 3px 3px 0px var(--border-dark);
}

.receipt-card.popular .btn-ticket-cta {
  background-color: var(--color-green);
  color: #FFFFFF;
}

.receipt-card.popular .btn-ticket-cta:hover {
  background-color: #008F5A;
}

/* Feature Cards Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-voucher {
  background-color: var(--bg-card);
  border: 3px solid var(--border-dark);
  box-shadow: var(--shadow-hard);
  padding: 24px;
  position: relative;
}

.feature-num {
  font-size: 0.8rem;
  color: var(--color-red);
  font-weight: 800;
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 800;
  margin: 8px 0 12px 0;
}

.feature-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Tutorial Section */
.tutorial-box {
  background-color: var(--bg-card);
  border: 3px solid var(--border-dark);
  box-shadow: var(--shadow-hard);
  padding: 30px;
}

.tab-nav {
  display: flex;
  gap: 12px;
  border-bottom: 2px solid var(--border-dark);
  padding-bottom: 16px;
  margin-bottom: 24px;
}

.tab-btn {
  background-color: var(--bg-paper);
  border: 2px solid var(--border-dark);
  padding: 10px 20px;
  font-family: var(--font-mono);
  font-weight: 700;
  cursor: pointer;
}

.tab-btn.active {
  background-color: var(--color-yellow);
  box-shadow: 2px 2px 0px var(--border-dark);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.step-card {
  border: 2px solid var(--border-dark);
  padding: 16px 20px;
  background-color: #FFFFFF;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.step-badge {
  background-color: var(--border-dark);
  color: #FFFFFF;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  flex-shrink: 0;
}

.step-details h4 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.step-details p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.code-snippet {
  background-color: var(--bg-paper-dark);
  border: 1px solid var(--border-dark);
  padding: 10px 14px;
  font-size: 0.85rem;
  margin-top: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.btn-copy {
  background-color: var(--color-yellow);
  border: 1px solid var(--border-dark);
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
}

/* Testimonial / User Reviews Cards */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background-color: #FFFFFF;
  border: 3px solid var(--border-dark);
  box-shadow: var(--shadow-hard);
  padding: 20px;
  position: relative;
}

.review-author {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px dashed var(--border-dark);
  padding-bottom: 10px;
  margin-bottom: 12px;
}

.author-name {
  font-weight: 800;
  font-size: 0.95rem;
}

.review-rating {
  color: var(--color-yellow);
  font-size: 1rem;
  text-shadow: 1px 1px 0px var(--border-dark);
}

.review-body {
  font-size: 0.9rem;
  color: var(--text-main);
  line-height: 1.5;
}

/* FAQ Accordion */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  border: 3px solid var(--border-dark);
  background-color: var(--bg-card);
  box-shadow: var(--shadow-hard);
}

.faq-question {
  padding: 18px 24px;
  font-weight: 800;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-icon {
  font-size: 1.3rem;
  font-weight: 800;
  transition: transform 0.2s ease;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
  font-size: 0.95rem;
  color: var(--text-muted);
  border-top: 0px dashed var(--border-dark);
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 16px 24px 24px 24px;
  border-top-width: 2px;
}

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

/* Article Cards Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background-color: #FFFFFF;
  border: 3px solid var(--border-dark);
  box-shadow: var(--shadow-hard);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hard-lg);
}

.article-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-tag {
  font-size: 0.75rem;
  color: var(--color-red);
  font-weight: 800;
  margin-bottom: 6px;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 10px;
}

.article-excerpt {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  flex: 1;
}

.article-footer {
  border-top: 1px dashed var(--border-dark);
  padding-top: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Article Detail Page Layout */
.article-container {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.article-header-box {
  background-color: var(--bg-card);
  border: 3px solid var(--border-dark);
  box-shadow: var(--shadow-hard);
  padding: 30px;
  margin-bottom: 30px;
}

.article-h1 {
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 15px;
}

.article-meta-bar {
  display: flex;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px dashed var(--border-dark);
  padding-top: 12px;
  flex-wrap: wrap;
}

.article-content {
  background-color: #FFFFFF;
  border: 3px solid var(--border-dark);
  box-shadow: var(--shadow-hard);
  padding: 40px;
  font-size: 1.05rem;
  line-height: 1.8;
}

.article-content h2 {
  font-size: 1.6rem;
  font-weight: 800;
  margin: 35px 0 15px 0;
  border-bottom: 2px solid var(--border-dark);
  padding-bottom: 8px;
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 800;
  margin: 25px 0 12px 0;
  color: var(--color-red);
}

.article-content p {
  margin-bottom: 20px;
  color: #262422;
}

.article-content ul, 
.article-content ol {
  margin: 0 0 20px 24px;
}

.article-content li {
  margin-bottom: 8px;
}

.toc-box {
  background-color: var(--bg-paper);
  border: 2px dashed var(--border-dark);
  padding: 20px;
  margin: 20px 0 30px 0;
}

.toc-title {
  font-weight: 800;
  font-size: 1rem;
  margin-bottom: 10px;
}

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

.toc-list li {
  margin-bottom: 6px;
}

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

/* Callout Box inside Article */
.callout-box {
  background-color: rgba(255, 214, 0, 0.15);
  border-left: 5px solid var(--color-yellow);
  border-top: 1px solid var(--border-dark);
  border-right: 1px solid var(--border-dark);
  border-bottom: 1px solid var(--border-dark);
  padding: 16px 20px;
  margin: 25px 0;
  font-size: 0.95rem;
}

.callout-box.danger {
  background-color: rgba(211, 47, 47, 0.08);
  border-left-color: var(--color-red);
}

/* Related Posts Section */
.related-posts-section {
  margin-top: 40px;
  border-top: 3px dashed var(--border-dark);
  padding-top: 30px;
}

/* Footer styling */
.site-footer {
  background-color: var(--border-dark);
  color: #F4F1EA;
  padding: 60px 20px 30px 20px;
  margin-top: 80px;
  border-top: 4px solid var(--border-dark);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

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

.footer-logo {
  font-size: 1.5rem;
  font-weight: 900;
  color: #FFFFFF;
}

.footer-desc {
  font-size: 0.85rem;
  color: #B0AAA0;
  max-width: 350px;
}

.footer-column h4 {
  color: var(--color-yellow);
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.85rem;
}

.footer-links a {
  color: #D5D0C5;
}

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

.footer-bottom {
  max-width: 1200px;
  margin: 40px auto 0 auto;
  border-top: 1px dashed #403D37;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: #908A7F;
  flex-wrap: wrap;
  gap: 10px;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-wrapper {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid, 
  .reviews-grid, 
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-container {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--bg-paper);
    border-bottom: 3px solid var(--border-dark);
    flex-direction: column;
    padding: 20px;
  }
  .nav-menu.open {
    display: flex;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .features-grid, 
  .reviews-grid, 
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .footer-container {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2rem;
  }
}