/* ==========================================================================
   赔钱机场官方网站 Design System (Monochrome High-Contrast Tech Theme)
   黑白极简高端科技风样式设计系统
   ========================================================================== */

:root {
  --bg-dark: #09090b;
  --bg-card-dark: #121215;
  --bg-card-dark-hover: #18181b;
  --bg-light: #ffffff;
  --bg-light-muted: #f4f4f5;

  --border-dark: rgba(255, 255, 255, 0.12);
  --border-dark-strong: rgba(255, 255, 255, 0.25);
  --border-light: #e4e4e7;
  
  --text-white: #ffffff;
  --text-dim: #a1a1aa;
  --text-muted: #71717a;
  --text-black: #09090b;

  --accent-white: #ffffff;
  --glow-white: 0 0 30px rgba(255, 255, 255, 0.15);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  
  --radius-xl: 20px;
  --radius-lg: 14px;
  --radius-md: 10px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-white);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Tech Canvas Background */
#tech-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
}

/* Layout Utilities */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
  border-bottom: 1px solid var(--border-dark);
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.25s ease;
}

/* High-Contrast Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
}

.btn-white {
  background: #ffffff;
  color: var(--text-black);
  box-shadow: 0 4px 20px rgba(255, 255, 255, 0.2);
}

.btn-white:hover {
  background: #e4e4e7;
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(255, 255, 255, 0.35);
}

.btn-outline-white {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-white);
  border: 1px solid var(--border-dark-strong);
  backdrop-filter: blur(10px);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #ffffff;
  transform: translateY(-2px);
}

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(9, 9, 11, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-dark);
  padding: 18px 0;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: #ffffff;
}

.brand-logo i {
  color: #ffffff;
}

.logo-badge {
  background: #ffffff;
  color: #000000;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dim);
  letter-spacing: 0.2px;
}

.nav-links a:hover {
  color: #ffffff;
}

/* Hero Section (Asymmetric Modern Layout) */
.hero-section {
  padding: 120px 0 90px;
  position: relative;
  border-bottom: 1px solid var(--border-dark);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.hero-left {
  max-width: 650px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-dark-strong);
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 28px;
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  background: #ffffff;
  border-radius: 50%;
  box-shadow: 0 0 10px #ffffff;
  animation: pulse-white 2s infinite;
}

@keyframes pulse-white {
  0% { transform: scale(0.9); opacity: 0.6; }
  50% { transform: scale(1.15); opacity: 1; box-shadow: 0 0 15px #ffffff; }
  100% { transform: scale(0.9); opacity: 0.6; }
}

.hero-title {
  font-size: 3.8rem;
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -2px;
  margin-bottom: 24px;
}

.hero-title span {
  background: linear-gradient(180deg, #ffffff 0%, #a1a1aa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--border-dark);
}

.stat-item h4 {
  font-size: 1.7rem;
  font-weight: 800;
  color: #ffffff;
}

.stat-item p {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 2px;
}

/* Terminal Console Display (Hero Right) */
.hero-console {
  background: var(--bg-card-dark);
  border: 1px solid var(--border-dark-strong);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--glow-white), 0 20px 40px rgba(0, 0, 0, 0.8);
}

.console-header {
  background: #18181b;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-dark);
}

.console-dots {
  display: flex;
  gap: 8px;
}

.console-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
}

.console-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.console-body {
  padding: 24px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #e4e4e7;
  line-height: 1.8;
}

.console-line {
  margin-bottom: 12px;
  display: flex;
  gap: 12px;
}

.console-line .prompt {
  color: var(--text-muted);
  user-select: none;
}

.console-line .highlight {
  color: #ffffff;
  font-weight: 700;
}

.console-line .status-tag {
  background: #ffffff;
  color: #000000;
  padding: 0 6px;
  border-radius: 3px;
  font-size: 0.75rem;
  font-weight: 800;
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 60px;
}

.section-tag {
  font-family: var(--font-mono);
  color: var(--text-dim);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: -1px;
  color: #ffffff;
}

.section-desc {
  color: var(--text-dim);
  margin-top: 14px;
  font-size: 1.05rem;
}

/* Bento Grid Features Layout */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.bento-card {
  background: var(--bg-card-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-xl);
  padding: 36px;
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
}

.bento-card:hover {
  border-color: var(--border-dark-strong);
  background: var(--bg-card-dark-hover);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
}

.bento-card.span-2 {
  grid-column: span 2;
}

.bento-icon {
  width: 56px;
  height: 56px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-dark-strong);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #ffffff;
  margin-bottom: 24px;
}

.bento-card h3 {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: #ffffff;
}

.bento-card p {
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Node Status Board (Monochrome High-Contrast) */
.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.node-card {
  background: var(--bg-card-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.25s ease;
}

.node-card:hover {
  border-color: #ffffff;
  background: #18181b;
}

.node-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.node-flag {
  font-size: 1.6rem;
}

.node-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: #ffffff;
}

.node-type {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.node-ping {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 4px 12px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ping-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 0 6px #ffffff;
}

/* Pricing Grid (High Contrast Black & White Cards) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 24px;
}

.price-card {
  background: var(--bg-card-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  position: relative;
}

.price-card:hover {
  border-color: var(--border-dark-strong);
  transform: translateY(-5px);
}

/* Featured White Card (Inverted Contrast) */
.price-card.popular {
  background: #ffffff;
  color: var(--text-black);
  border: none;
  box-shadow: 0 20px 40px rgba(255, 255, 255, 0.15);
}

.popular-tag {
  position: absolute;
  top: -14px;
  right: 28px;
  background: #09090b;
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.price-card.popular .price-header h3,
.price-card.popular .price-val {
  color: var(--text-black);
}

.price-card.popular .price-header p,
.price-card.popular .price-val span,
.price-card.popular .price-features li {
  color: #3f3f46;
}

.price-header h3 {
  font-size: 1.4rem;
  font-weight: 800;
}

.price-header p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.price-val {
  font-size: 2.8rem;
  font-weight: 900;
  margin: 24px 0 16px;
  color: #ffffff;
  font-family: var(--font-mono);
}

.price-val span {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
}

.price-features {
  list-style: none;
  margin: 24px 0 36px;
  flex-grow: 1;
}

.price-features li {
  font-size: 0.9rem;
  color: var(--text-dim);
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
}

.price-card.popular .price-features li {
  border-bottom-color: rgba(0, 0, 0, 0.08);
}

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

.review-card {
  background: var(--bg-card-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-xl);
  padding: 32px;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.user-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #ffffff;
  color: #000000;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.1rem;
}

.user-meta h4 {
  font-size: 1rem;
  font-weight: 800;
  color: #ffffff;
}

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

.stars {
  color: #ffffff;
  font-size: 0.85rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

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

.faq-item {
  background: var(--bg-card-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-question {
  padding: 24px 28px;
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  color: #ffffff;
}

.faq-answer {
  padding: 0 28px 24px;
  color: var(--text-dim);
  font-size: 0.95rem;
  display: none;
  border-top: 1px dashed var(--border-dark);
  padding-top: 18px;
}

.faq-item.active {
  border-color: var(--border-dark-strong);
  background: var(--bg-card-dark-hover);
}

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

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

.faq-icon {
  transition: transform 0.3s ease;
  color: var(--text-muted);
}

/* Knowledge Base Grid */
.kb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.kb-card {
  background: var(--bg-card-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-xl);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.kb-card:hover {
  transform: translateY(-4px);
  border-color: #ffffff;
  background: #18181b;
}

.kb-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: #000000;
  background: #ffffff;
  padding: 4px 10px;
  border-radius: 4px;
  align-self: flex-start;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.kb-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: #ffffff;
  line-height: 1.4;
}

.kb-card p {
  font-size: 0.88rem;
  color: var(--text-dim);
  flex-grow: 1;
  margin-bottom: 20px;
}

.kb-link {
  font-weight: 700;
  font-size: 0.85rem;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Subpage Article System */
.article-container {
  max-width: 880px;
  margin: 50px auto 100px;
  background: var(--bg-card-dark);
  border: 1px solid var(--border-dark-strong);
  border-radius: var(--radius-xl);
  padding: 56px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
}

.article-header {
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border-dark);
  padding-bottom: 28px;
}

.article-meta {
  display: flex;
  gap: 20px;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 16px;
  font-family: var(--font-mono);
}

.article-body h2 {
  font-size: 1.6rem;
  margin: 32px 0 18px;
  color: #ffffff;
}

.article-body p {
  margin-bottom: 20px;
  color: #d4d4d8;
  font-size: 1.02rem;
  line-height: 1.75;
}

.article-body ul, .article-body ol {
  margin: 0 0 24px 24px;
  color: #d4d4d8;
}

.article-body li {
  margin-bottom: 10px;
}

.article-body blockquote {
  background: rgba(255, 255, 255, 0.04);
  border-left: 4px solid #ffffff;
  padding: 20px 24px;
  margin: 28px 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: #e4e4e7;
}

.cta-box {
  background: #ffffff;
  color: var(--text-black);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  margin: 48px 0;
}

.cta-box h3 {
  font-size: 1.5rem;
  margin-bottom: 12px;
  color: var(--text-black);
}

.cta-box p {
  color: #3f3f46;
}

/* Footer */
.footer {
  background: #000000;
  color: var(--text-dim);
  padding: 80px 0 40px;
  border-top: 1px solid var(--border-dark);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand h3 {
  color: #ffffff;
  font-size: 1.5rem;
  margin-bottom: 16px;
  font-weight: 900;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 0.95rem;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-family: var(--font-mono);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul a {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.footer-col ul a:hover {
  color: #ffffff;
}

.footer-bottom {
  text-align: center;
  padding-top: 32px;
  border-top: 1px solid var(--border-dark);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Responsive Rules */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  
  .bento-grid {
    grid-template-columns: 1fr;
  }
  
  .bento-card.span-2 {
    grid-column: span 1;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero-title {
    font-size: 2.6rem;
  }

  .article-container {
    padding: 28px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
}