/* ==========================================================================
   赔钱机场官网 (Peiqian Airport) - Apple Minimalist / Neo-Brutalist Light Style
   ========================================================================== */

:root {
  /* Dynamic Neo-Apple Palette */
  --bg-main: #F4F6F9;
  --bg-card: #FFFFFF;
  --bg-accent: #EEF2F6;
  --border-card: #E2E8F0;
  --border-strong: #0F172A;
  
  --primary-blue: #2563EB;
  --primary-dark: #1E40AF;
  --emerald-green: #059669;
  --amber-orange: #D97706;
  
  --text-main: #0F172A;
  --text-sub: #475569;
  --text-muted: #64748B;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  --radius-xs: 8px;
  --radius-sm: 14px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-xl: 36px;
  
  --shadow-subtle: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
  --shadow-strong: 0 12px 36px -6px rgba(15, 23, 42, 0.12);
  --shadow-hover: 0 20px 45px -8px rgba(37, 99, 235, 0.15);
  
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--bg-main);
}

/* Canvas Dynamic Grid & Mesh Ambient */
#bgCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  pointer-events: none;
}

.ambient-glow-top {
  position: fixed;
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 500px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, rgba(244, 246, 249, 0) 70%);
  filter: blur(100px);
  z-index: -1;
  pointer-events: none;
}

/* Top Announcement Bar */
.top-bar {
  background: #0F172A;
  color: #FFFFFF;
  padding: 10px 20px;
  font-size: 0.88rem;
  font-weight: 500;
  text-align: center;
  position: relative;
  z-index: 100;
}

.top-bar-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.top-tag {
  background: var(--primary-blue);
  color: #FFF;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.top-btn {
  color: #38BDF8;
  font-weight: 700;
  cursor: pointer;
  text-decoration: underline;
  margin-left: 6px;
  transition: var(--transition-fast);
}

.top-btn:hover {
  color: #7DD3FC;
}

/* Header & Glass Navigation */
.main-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(244, 246, 249, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-card);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}

.brand-icon {
  width: 42px;
  height: 42px;
  background: var(--text-main);
  color: #FFF;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(5, 150, 105, 0.1);
  color: var(--emerald-green);
  border: 1px solid rgba(5, 150, 105, 0.2);
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  background: var(--emerald-green);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(5, 150, 105, 0.7);
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(5, 150, 105, 0.7); }
  70% { box-shadow: 0 0 0 8px rgba(5, 150, 105, 0); }
  100% { box-shadow: 0 0 0 0 rgba(5, 150, 105, 0); }
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-sub);
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition-fast);
}

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

.nav-cta-btn {
  background: var(--text-main);
  color: #FFF;
  border: none;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition-smooth);
}

.nav-cta-btn:hover {
  background: var(--primary-blue);
  transform: translateY(-1px);
  box-shadow: var(--shadow-subtle);
}

/* Layout Containers & Sections */
.section-wrapper {
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 24px;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px auto;
}

.section-badge {
  display: inline-block;
  background: var(--bg-accent);
  color: var(--primary-blue);
  border: 1px solid var(--border-card);
  padding: 4px 14px;
  border-radius: 30px;
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 14px;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 900;
  letter-spacing: -0.8px;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.2;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-sub);
  line-height: 1.6;
}

/* HERO SECTION - Apple Modern Bold */
.hero-section {
  padding: 70px 24px 60px 24px;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #FFF;
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-subtle);
  padding: 6px 18px;
  border-radius: 30px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-sub);
  margin-bottom: 28px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1.5px;
  color: var(--text-main);
  max-width: 960px;
  margin: 0 auto 24px auto;
}

.hero-title span {
  background: linear-gradient(135deg, var(--primary-blue), #4F46E5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-sub);
  max-width: 720px;
  margin: 0 auto 40px auto;
  font-weight: 500;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.btn-primary-hero {
  background: var(--primary-blue);
  color: #FFF;
  font-size: 1.1rem;
  font-weight: 800;
  padding: 16px 36px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
  transition: var(--transition-smooth);
}

.btn-primary-hero:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 15px 35px rgba(37, 99, 235, 0.4);
}

.btn-secondary-hero {
  background: #FFF;
  color: var(--text-main);
  font-size: 1.1rem;
  font-weight: 800;
  padding: 16px 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-card);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-subtle);
  transition: var(--transition-smooth);
}

.btn-secondary-hero:hover {
  background: var(--bg-accent);
  border-color: var(--text-main);
}

/* Feature Badge Platform Grid */
.platform-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  margin-top: 10px;
  padding-top: 24px;
  border-top: 1px dashed var(--border-card);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.platform-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-sub);
  font-size: 0.92rem;
  font-weight: 700;
}

.platform-item i {
  font-size: 1.2rem;
  color: var(--primary-blue);
}

/* NODE STATUS DASHBOARD - Clean Apple Matrix */
.node-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.node-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-subtle);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.node-item:hover {
  border-color: var(--primary-blue);
  transform: translateY(-4px);
  box-shadow: var(--shadow-strong);
}

.node-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.node-flag-title {
  display: flex;
  align-items: center;
  gap: 10px;
}

.node-badge-code {
  width: 38px;
  height: 38px;
  background: var(--bg-accent);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
  color: var(--text-main);
}

.node-name {
  font-weight: 800;
  font-size: 1rem;
  color: var(--text-main);
}

.node-tag {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
}

.node-ping {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--emerald-green);
  background: rgba(5, 150, 105, 0.1);
  padding: 4px 10px;
  border-radius: 20px;
}

.node-body {
  margin-top: 10px;
}

.node-progress-bar {
  width: 100%;
  height: 8px;
  background: var(--bg-accent);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 8px;
}

.node-progress-fill {
  height: 100%;
  background: var(--emerald-green);
  border-radius: 4px;
}

.node-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* CORE FEATURES SECTION - Neo Brutalist Cards */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: var(--shadow-subtle);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary-blue);
}

.feature-icon-box {
  width: 56px;
  height: 56px;
  background: var(--bg-accent);
  color: var(--primary-blue);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.7rem;
  margin-bottom: 24px;
}

.feature-card-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}

.feature-card-desc {
  font-size: 0.98rem;
  color: var(--text-sub);
  line-height: 1.6;
}

/* PRICING SECTION - Clean High-Contrast Cards */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 30px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  box-shadow: var(--shadow-subtle);
  transition: var(--transition-smooth);
}

.pricing-card.featured {
  border: 2px solid var(--primary-blue);
  box-shadow: var(--shadow-strong);
  transform: scale(1.02);
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-blue);
  color: #FFF;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: 20px;
  letter-spacing: 0.5px;
}

.pricing-header-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 6px;
}

.pricing-header-subtitle {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.pricing-price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 30px;
}

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

.price-num {
  font-size: 3.2rem;
  font-weight: 900;
  letter-spacing: -1px;
  color: var(--text-main);
}

.period {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 600;
}

.pricing-list {
  list-style: none;
  margin-bottom: 36px;
}

.pricing-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-sub);
  margin-bottom: 14px;
  font-weight: 600;
}

.pricing-list li i {
  color: var(--emerald-green);
  font-size: 1.1rem;
}

.btn-pricing {
  width: 100%;
  padding: 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text-main);
  font-weight: 800;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-align: center;
}

.btn-pricing:hover {
  background: var(--text-main);
  color: #FFF;
}

.pricing-card.featured .btn-pricing {
  background: var(--primary-blue);
  color: #FFF;
  border: none;
}

.pricing-card.featured .btn-pricing:hover {
  background: var(--primary-dark);
}

/* REVIEWS SECTION */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-subtle);
}

.review-user {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--primary-blue);
  color: #FFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
}

.user-info h4 {
  font-size: 1rem;
  font-weight: 800;
}

.user-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.stars {
  color: #F59E0B;
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.6;
}

/* FAQ SECTION */
.faq-grid {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-fast);
}

.faq-question {
  padding: 22px 28px;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-question i {
  font-size: 1.3rem;
  color: var(--primary-blue);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 28px 22px 28px;
  font-size: 0.98rem;
  color: var(--text-sub);
  line-height: 1.7;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

/* KNOWLEDGE BASE / 10 SEO TUTORIAL ARTICLES */
.tutorials-section {
  background: #FFF;
  border-top: 1px solid var(--border-card);
  border-bottom: 1px solid var(--border-card);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.article-card {
  background: var(--bg-main);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.article-card:hover {
  border-color: var(--primary-blue);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.article-tag {
  display: inline-block;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary-blue);
  font-size: 0.78rem;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 14px;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.4;
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-sub);
  margin-bottom: 20px;
  line-height: 1.6;
}

.btn-read-article {
  background: var(--text-main);
  color: #FFF;
  border: none;
  padding: 10px 18px;
  border-radius: var(--radius-xs);
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  align-self: flex-start;
  transition: var(--transition-fast);
}

.btn-read-article:hover {
  background: var(--primary-blue);
}

/* ARTICLE MODAL / FULL READER */
.article-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.article-modal.active {
  display: flex;
}

.modal-content-box {
  background: #FFF;
  max-width: 860px;
  width: 100%;
  max-height: 85vh;
  border-radius: var(--radius-lg);
  overflow-y: auto;
  padding: 40px;
  position: relative;
  box-shadow: var(--shadow-strong);
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  background: var(--bg-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  cursor: pointer;
  border: none;
}

.modal-article-body h2 {
  font-size: 1.8rem;
  font-weight: 900;
  margin-bottom: 16px;
  color: var(--text-main);
}

.modal-article-body h3 {
  font-size: 1.3rem;
  font-weight: 800;
  margin: 24px 0 12px 0;
  color: var(--text-main);
}

.modal-article-body p {
  font-size: 1rem;
  color: var(--text-sub);
  line-height: 1.8;
  margin-bottom: 16px;
}

/* FOOTER */
.main-footer {
  background: #0F172A;
  color: #94A3B8;
  padding: 60px 24px 30px 24px;
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid #1E293B;
}

.footer-col h4 {
  color: #FFF;
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #94A3B8;
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: #38BDF8;
}

.footer-bottom {
  max-width: 1280px;
  margin: 30px auto 0 auto;
  text-align: center;
  font-size: 0.85rem;
  color: #64748B;
}

/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
  }
  .nav-menu {
    display: none;
  }
  .section-wrapper {
    padding: 50px 16px;
  }
  .modal-content-box {
    padding: 24px;
  }
}