/* yuntujichang.autos - Alpine Celadon Sky & Mint-Jade Aviation Chart */
:root {
  --bg-celadon: #ECFDF5;
  --bg-mint-soft: #D1FAE5;
  --bg-surface: #FFFFFF;
  --ink-forest: #062C21;
  --ink-sage: #2D5A4C;
  --emerald-main: #059669;
  --emerald-deep: #047857;
  --lime-signal: #65A30D;
  --teal-chart: #0D9488;
  --border-chart: rgba(5, 150, 105, 0.24);
  --shadow-chart: 0 16px 38px rgba(6, 44, 33, 0.07);
}

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

html {
  scroll-behavior: smooth;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-celadon);
  color: var(--ink-forest);
  line-height: 1.75;
}

body {
  background-color: var(--bg-celadon);
  background-image:
    linear-gradient(rgba(5, 150, 105, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(5, 150, 105, 0.05) 1px, transparent 1px);
  background-size: 36px 36px;
  overflow-x: hidden;
}

a, a:visited {
  color: var(--emerald-deep);
  text-decoration: underline;
  text-underline-offset: 4px;
  font-weight: 700;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--lime-signal);
}

.av-wrap {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Floating Pill Aviation Header */
.av-header {
  position: sticky;
  top: 12px;
  z-index: 100;
  padding: 0 16px;
  margin-bottom: 12px;
}

.av-nav-capsule {
  max-width: 1220px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.95);
  border: 2px solid var(--emerald-main);
  border-radius: 20px;
  padding: 12px 24px;
  box-shadow: 0 10px 28px rgba(5, 150, 105, 0.12);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.av-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none !important;
}

.av-brand-name {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--ink-forest);
  letter-spacing: 1px;
}

.av-nav-menu {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.av-nav-menu a, .av-nav-menu a:visited {
  color: var(--ink-forest);
  text-decoration: none;
  font-size: 0.94rem;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 8px;
}

.av-nav-menu a:hover, .av-nav-menu a.active {
  background: var(--bg-mint-soft);
  color: var(--emerald-deep);
}

.btn-av-nav, .btn-av-nav:visited {
  background: var(--emerald-main) !important;
  color: #FFFFFF !important;
  text-decoration: none !important;
  padding: 8px 20px !important;
  border-radius: 10px !important;
  font-weight: 800;
}

/* Hero Section - Flight Deck Split with Vertical Telemetry Strip */
.av-hero {
  padding: 46px 0 68px;
}

.av-hero-deck {
  display: grid;
  grid-template-columns: 84px 1fr 1.15fr;
  gap: 28px;
  align-items: stretch;
}

.av-altitude-strip {
  background: var(--ink-forest);
  color: #A7F3D0;
  border-radius: 20px;
  padding: 20px 10px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  font-family: monospace;
  font-size: 0.78rem;
  border: 2px solid var(--emerald-main);
}

.av-altitude-strip span {
  writing-mode: vertical-rl;
  letter-spacing: 2px;
  font-weight: 700;
}

.av-hero-copy {
  background: var(--bg-surface);
  border: 2px solid var(--border-chart);
  border-radius: 24px;
  padding: 40px 36px;
  box-shadow: var(--shadow-chart);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.av-coord-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-mint-soft);
  color: var(--emerald-deep);
  font-size: 0.84rem;
  font-weight: 800;
  padding: 5px 14px;
  border-radius: 6px;
  width: fit-content;
  margin-bottom: 18px;
}

.av-hero-copy h1 {
  font-size: 2.55rem;
  line-height: 1.24;
  color: var(--ink-forest);
  margin-bottom: 18px;
  font-weight: 900;
}

.av-hero-copy h1 span {
  color: var(--emerald-main);
  text-decoration: underline wavy var(--lime-signal) 2px;
  text-underline-offset: 6px;
}

.av-hero-copy p {
  color: var(--ink-sage);
  font-size: 1.04rem;
  margin-bottom: 28px;
}

.av-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn-av-emerald, .btn-av-emerald:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #059669 0%, #65A30D 100%);
  color: #FFFFFF !important;
  text-decoration: none !important;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 1.02rem;
  font-weight: 800;
  box-shadow: 0 12px 24px rgba(5, 150, 105, 0.25);
  transition: transform 0.2s ease;
}

.btn-av-emerald:hover {
  transform: translateY(-3px);
}

.btn-av-lime, .btn-av-lime:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-celadon);
  color: var(--ink-forest) !important;
  text-decoration: none !important;
  padding: 14px 24px;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 800;
  border: 2px solid var(--emerald-main);
  transition: transform 0.2s ease;
}

.btn-av-lime:hover {
  background: var(--bg-mint-soft);
  transform: translateY(-3px);
}

/* Isometric Emerald Cloud-Terrain & Glider Formation Stage */
.av-iso-stage {
  background: linear-gradient(160deg, #042F2E 0%, #064E3B 55%, #0F766E 100%);
  border: 2px solid var(--emerald-main);
  border-radius: 24px;
  padding: 18px;
  box-shadow: var(--shadow-chart);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.av-iso-stage svg {
  width: 100%;
  height: auto;
  display: block;
}

@keyframes radarSweep {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes isoPlateauFloat {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

@keyframes gliderFly {
  0%, 100% { transform: translate(0px, 0px); }
  50% { transform: translate(14px, -10px); }
}

@keyframes contrailDash {
  0% { stroke-dashoffset: 220; }
  100% { stroke-dashoffset: 0; }
}

.anim-radar-beam {
  animation: radarSweep 10s linear infinite;
  transform-origin: 300px 230px;
}

.anim-plateau-1 {
  animation: isoPlateauFloat 5s ease-in-out infinite;
}

.anim-plateau-2 {
  animation: isoPlateauFloat 6.5s ease-in-out infinite 1s;
}

.anim-glider-squad {
  animation: gliderFly 4.2s ease-in-out infinite;
}

.anim-contrail {
  stroke-dasharray: 10 8;
  animation: contrailDash 4s linear infinite;
}

/* Sections */
.av-sec {
  padding: 74px 0;
}

.av-sec.mint-band {
  background: rgba(209, 250, 229, 0.55);
  border-top: 2px dashed var(--border-chart);
  border-bottom: 2px dashed var(--border-chart);
}

.av-sec-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 44px;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--ink-forest);
}

.av-sec-header h2 {
  font-size: 2rem;
  color: var(--ink-forest);
  font-weight: 900;
}

.av-sec-header p {
  color: var(--ink-sage);
  max-width: 520px;
}

/* Step-Ladder Advantage Cards (4 cards) */
.av-ladder-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.av-ladder-card {
  background: var(--bg-surface);
  border: 2px solid var(--ink-forest);
  border-radius: 16px;
  padding: 26px 22px;
  box-shadow: 6px 6px 0px var(--emerald-main);
  position: relative;
}

.av-fl-code {
  display: inline-block;
  background: var(--ink-forest);
  color: #6EE7B7;
  font-family: monospace;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 14px;
}

.av-ladder-card h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
  color: var(--ink-forest);
}

.av-ladder-card p {
  font-size: 0.92rem;
  color: var(--ink-sage);
}

/* Boarding-Pass Streaming & AI Cards (4 cards) */
.av-pass-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.av-boarding-pass {
  background: var(--bg-surface);
  border: 2px solid var(--emerald-main);
  border-radius: 18px;
  display: grid;
  grid-template-columns: 110px 1fr;
  overflow: hidden;
  box-shadow: var(--shadow-chart);
}

.av-pass-stub {
  background: var(--emerald-deep);
  color: #ECFDF5;
  padding: 20px 14px;
  border-right: 2px dashed #A7F3D0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  text-align: center;
  font-family: monospace;
}

.av-pass-stub strong {
  font-size: 1.3rem;
  color: #BEF264;
}

.av-pass-body {
  padding: 24px;
}

.av-pass-body h3 {
  font-size: 1.22rem;
  color: var(--ink-forest);
  margin-bottom: 8px;
}

.av-pass-body p {
  font-size: 0.93rem;
  color: var(--ink-sage);
}

/* Pricing (3 tiers) */
.av-price-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.av-price-card {
  background: var(--bg-surface);
  border: 2px solid var(--ink-forest);
  border-radius: 20px;
  padding: 32px 26px;
  box-shadow: 8px 8px 0px rgba(5, 150, 105, 0.2);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.av-price-card.prime {
  background: #062C21;
  color: #ECFDF5;
  border-color: #65A30D;
  box-shadow: 10px 10px 0px #059669;
}

.av-price-card.prime h3,
.av-price-card.prime li {
  color: #ECFDF5 !important;
}

.av-price-num {
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--emerald-main);
  margin: 14px 0;
}

.av-price-card.prime .av-price-num {
  color: #BEF264;
}

.av-price-ul {
  list-style: none;
  margin: 16px 0 26px;
}

.av-price-ul li {
  padding: 8px 0;
  border-bottom: 1px dashed var(--border-chart);
  font-size: 0.94rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Testimonials & FAQ */
.av-review-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.av-review-box {
  background: var(--bg-surface);
  border: 2px solid var(--border-chart);
  border-radius: 16px;
  padding: 24px;
}

.av-faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.av-faq-card {
  background: var(--bg-surface);
  border-left: 5px solid var(--emerald-main);
  border-radius: 12px;
  padding: 22px;
  box-shadow: var(--shadow-chart);
}

.av-faq-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--ink-forest);
}

/* Hub Cards */
.av-hub-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.av-hub-card {
  background: var(--bg-surface);
  border: 2px solid var(--ink-forest);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 5px 5px 0px var(--emerald-main);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.av-hub-card h2, .av-hub-card h3 {
  font-size: 1.15rem;
  margin: 10px 0;
}

/* Subpage */
.av-doc-sec {
  padding: 48px 0 76px;
}

.av-doc-box {
  max-width: 900px;
  margin: 0 auto;
  background: var(--bg-surface);
  border: 2px solid var(--ink-forest);
  border-radius: 22px;
  padding: 44px;
  box-shadow: 8px 8px 0px var(--emerald-main);
}

.av-doc-box h1 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.av-doc-meta {
  font-size: 0.88rem;
  color: var(--ink-sage);
  padding-bottom: 16px;
  margin-bottom: 24px;
  border-bottom: 2px dashed var(--border-chart);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.av-doc-body h2 {
  font-size: 1.38rem;
  color: var(--emerald-deep);
  margin: 26px 0 12px;
}

.av-doc-body h3 {
  font-size: 1.14rem;
  color: var(--ink-forest);
  margin: 18px 0 8px;
}

.av-doc-body p {
  margin-bottom: 15px;
}

.av-footer {
  background: var(--ink-forest);
  color: #D1FAE5;
  padding: 42px 0;
  border-top: 4px solid var(--emerald-main);
}

.av-footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.av-footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.av-footer-links a, .av-footer-links a:visited {
  color: #6EE7B7 !important;
  text-decoration: none;
}

@media (max-width: 980px) {
  .av-hero-deck,
  .av-ladder-list,
  .av-pass-grid,
  .av-price-row,
  .av-review-row,
  .av-faq-grid,
  .av-hub-grid {
    grid-template-columns: 1fr;
  }
  .av-altitude-strip {
    flex-direction: row;
    padding: 10px 18px;
  }
  .av-altitude-strip span {
    writing-mode: horizontal-tb;
  }
}

@media (max-width: 768px) {
  .av-nav-capsule {
    flex-direction: column;
    align-items: flex-start;
  }
  .av-nav-menu {
    display: flex !important;
    width: 100%;
    flex-wrap: wrap;
    gap: 8px;
  }
  .av-boarding-pass {
    grid-template-columns: 1fr;
  }
  .av-pass-stub {
    border-right: none;
    border-bottom: 2px dashed #A7F3D0;
    flex-direction: row;
  }
  .av-doc-box {
    padding: 24px 18px;
  }
}