:root {
  --ink: #1b3e51;
  --ink-deep: #122c3a;
  --ink-soft: #2a5266;
  --red: #c1272d;
  --red-deep: #9e1f24;
  --paper: #f4f7f9;
  --paper-2: #e8eef2;
  --line: #d3dde4;
  --text: #1a2433;
  --muted: #5f7182;
  --white: #ffffff;
  --max: 1120px;
  --nav-h: 76px;
  --font-display: "Sora", "Noto Sans SC", "PingFang SC", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow: 0 20px 50px rgba(27, 62, 81, 0.12);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
h1, h2, h3, h4 { margin: 0; font-family: var(--font-display); line-height: 1.2; letter-spacing: -0.02em; }
p { margin: 0; }

.wrap {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

/* ---------- Nav ---------- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  background: rgba(244, 247, 249, 0.86);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.site-nav.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 24px rgba(27, 62, 81, 0.06);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand img {
  width: 118px;
  height: auto;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.brand-text strong {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.brand-text span {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a {
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-soft);
  transition: background 0.2s, color 0.2s;
}

.nav-links a:hover,
.nav-links a.is-active {
  background: rgba(27, 62, 81, 0.08);
  color: var(--ink);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 999px;
  background: var(--red);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: background 0.2s, transform 0.2s var(--ease);
}

.nav-cta:hover {
  background: var(--red-deep);
  transform: translateY(-1px);
}

.nav-panel {
  display: none;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  position: relative;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--ink);
}

.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s var(--ease), background 0.2s, color 0.2s, border-color 0.2s;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--red);
  color: #fff;
}

.btn-primary:hover { background: var(--red-deep); }

.btn-ink {
  background: var(--ink);
  color: #fff;
}

.btn-ink:hover { background: var(--ink-soft); }

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.45);
  color: #fff;
  background: transparent;
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn-outline {
  border-color: var(--line);
  color: var(--ink);
  background: var(--white);
}

.btn-outline:hover {
  border-color: var(--ink);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: calc(100vh - var(--nav-h));
  min-height: calc(100svh - var(--nav-h));
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #fff;
  background: var(--ink-deep);
}

.hero-media {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(18, 44, 58, 0.92) 0%, rgba(27, 62, 81, 0.72) 48%, rgba(18, 44, 58, 0.55) 100%),
    url("../assets/hero-plane.jpg") center / cover no-repeat;
  transform: scale(1.04);
  animation: hero-zoom 12s var(--ease) both;
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(18, 44, 58, 0.25) 0%, rgba(18, 44, 58, 0.55) 55%, rgba(18, 44, 58, 0.92) 100%);
}

@keyframes hero-zoom {
  from { transform: scale(1.1); }
  to { transform: scale(1.04); }
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 72px 0 88px;
  animation: rise 0.8s var(--ease) both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.78);
}

.hero-kicker img {
  width: 110px;
  height: auto;
}

.hero h1 {
  max-width: 14ch;
  font-size: clamp(40px, 7vw, 72px);
  font-weight: 700;
  color: #fff;
}

.hero-lead {
  margin-top: 22px;
  max-width: 36em;
  font-size: clamp(16px, 2.1vw, 19px);
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.86);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.hero-stats strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
}

.hero-stats span {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}

/* ---------- Sections ---------- */

.section {
  padding: 88px 0;
}

.section-head {
  max-width: 40em;
  margin-bottom: 40px;
}

.section-head .eyebrow {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--red);
}

.section-head h2 {
  font-size: clamp(28px, 4vw, 42px);
  color: var(--ink);
}

.section-head p {
  margin-top: 14px;
  color: var(--muted);
  font-size: 17px;
}

.section-muted {
  background: linear-gradient(180deg, var(--paper-2), var(--paper));
}

.section-ink {
  background: linear-gradient(160deg, var(--ink-deep), var(--ink) 55%, #234b61);
  color: #fff;
}

.section-ink .section-head .eyebrow { color: rgba(255, 255, 255, 0.65); }
.section-ink .section-head h2 { color: #fff; }
.section-ink .section-head p { color: rgba(255, 255, 255, 0.72); }

/* ---------- Service strip ---------- */

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.service-item {
  padding: 28px 24px 30px;
  border-top: 3px solid var(--red);
  background: transparent;
  animation: rise 0.7s var(--ease) both;
}

.service-item:nth-child(2) { animation-delay: 0.08s; }
.service-item:nth-child(3) { animation-delay: 0.16s; }
.service-item:nth-child(4) { animation-delay: 0.24s; }

.service-item .num {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--red);
  margin-bottom: 18px;
}

.service-item h3 {
  font-size: 22px;
  color: var(--ink);
  margin-bottom: 12px;
}

.service-item p {
  color: var(--muted);
  font-size: 15px;
}

/* ---------- Why ---------- */

.why-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: start;
}

.why-list {
  display: grid;
  gap: 0;
}

.why-item {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 18px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.why-item:first-child { border-top: 1px solid var(--line); }

.why-item .idx {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--red);
  line-height: 1;
}

.why-item h3 {
  font-size: 20px;
  color: var(--ink);
  margin-bottom: 8px;
}

.why-item p { color: var(--muted); }

.why-panel {
  position: relative;
  min-height: 420px;
  padding: 36px;
  border-radius: 28px;
  overflow: hidden;
  color: #fff;
  background:
    linear-gradient(160deg, rgba(27, 62, 81, 0.88), rgba(193, 39, 45, 0.55)),
    url("../assets/hero-plane.jpg") center / cover no-repeat;
  box-shadow: var(--shadow);
}

.why-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 20%, rgba(18, 44, 58, 0.75));
}

.why-panel-inner {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 14px;
}

.why-panel img.logo-mark {
  width: 140px;
  margin-bottom: auto;
}

.why-panel h3 {
  font-size: 28px;
  max-width: 10ch;
}

.why-panel p {
  color: rgba(255, 255, 255, 0.82);
  max-width: 28em;
}

/* ---------- Airlines ---------- */

.airline-row {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 12px;
}

.airline-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 110px;
  padding: 16px 10px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.06);
  text-align: center;
}

.airline-chip strong {
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 0.04em;
}

.airline-chip span {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.35;
}

/* ---------- Page hero (inner) ---------- */

.page-hero {
  padding: 72px 0 48px;
  background:
    radial-gradient(700px 280px at 0% 0%, rgba(193, 39, 45, 0.08), transparent 60%),
    radial-gradient(800px 320px at 100% 0%, rgba(27, 62, 81, 0.1), transparent 55%),
    var(--paper);
  border-bottom: 1px solid var(--line);
}

.breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 18px;
  font-size: 13px;
  color: var(--muted);
}

.breadcrumb a:hover { color: var(--ink); }

.page-hero h1 {
  font-size: clamp(34px, 5vw, 52px);
  color: var(--ink);
  max-width: 14ch;
}

.page-hero p {
  margin-top: 16px;
  max-width: 38em;
  font-size: 18px;
  color: var(--muted);
}

/* ---------- Detail blocks ---------- */

.detail-stack {
  display: grid;
  gap: 28px;
}

.detail-block {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 28px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.detail-block:first-child { border-top: 1px solid var(--line); }

.detail-block .label {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--red);
}

.detail-block h2 {
  font-size: 28px;
  color: var(--ink);
  margin-bottom: 12px;
}

.detail-block p {
  color: var(--muted);
  margin-bottom: 12px;
}

.detail-block p:last-child { margin-bottom: 0; }

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.tag {
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(27, 62, 81, 0.07);
  color: var(--ink);
  font-size: 13px;
  font-weight: 500;
}

.mini-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.mini-item {
  padding: 18px 18px 20px;
  border-left: 3px solid var(--red);
  background: rgba(27, 62, 81, 0.03);
}

.mini-item h4 {
  font-size: 16px;
  color: var(--ink);
  margin-bottom: 6px;
}

.mini-item p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

/* ---------- About ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: start;
}

.prose {
  display: grid;
  gap: 16px;
  color: var(--muted);
  font-size: 17px;
}

.prose strong { color: var(--ink); }

.info-sheet {
  padding: 28px;
  border-radius: 24px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.info-sheet .logo-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.info-sheet .logo-row img {
  width: 110px;
}

.info-sheet dl {
  margin: 0;
  display: grid;
  gap: 16px;
}

.info-sheet dt {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}

.info-sheet dd {
  margin: 0;
  color: var(--ink);
  font-weight: 600;
  line-height: 1.5;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.capability-item {
  padding: 24px 20px;
  border-top: 3px solid var(--ink);
}

.capability-item h3 {
  font-size: 18px;
  color: var(--ink);
  margin-bottom: 10px;
}

.capability-item p {
  font-size: 14px;
  color: var(--muted);
}

/* ---------- Contact ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 36px;
  align-items: start;
}

.contact-list {
  display: grid;
  gap: 22px;
}

.contact-item h3 {
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 8px;
}

.contact-item p,
.contact-item a {
  color: var(--ink);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.55;
}

.contact-item a:hover { color: var(--red); }

.quote-form {
  padding: 28px;
  border-radius: 24px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.quote-form h2 {
  font-size: 24px;
  color: var(--ink);
  margin-bottom: 8px;
}

.quote-form .hint {
  color: var(--muted);
  margin-bottom: 22px;
  font-size: 14px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.field {
  display: grid;
  gap: 6px;
}

.field.full { grid-column: 1 / -1; }

.field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfcfd;
  color: var(--text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.field textarea { min-height: 110px; resize: vertical; }

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(27, 62, 81, 0.1);
}

.form-actions {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.form-note {
  font-size: 13px;
  color: var(--muted);
}

/* ---------- CTA band ---------- */

.cta-band {
  padding: 72px 0;
  background: var(--ink-deep);
  color: #fff;
  text-align: center;
}

.cta-band img {
  width: 120px;
  margin: 0 auto 22px;
}

.cta-band h2 {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 12px;
}

.cta-band p {
  max-width: 34em;
  margin: 0 auto 28px;
  color: rgba(255, 255, 255, 0.75);
}

.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- Footer ---------- */

.site-footer {
  padding: 56px 0 28px;
  background: #0f2733;
  color: rgba(255, 255, 255, 0.72);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand img {
  width: 120px;
  margin-bottom: 16px;
}

.footer-brand p {
  max-width: 28em;
  font-size: 14px;
  line-height: 1.7;
}

.footer-col h4 {
  color: #fff;
  font-size: 14px;
  margin-bottom: 14px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer-col a,
.footer-col p {
  display: block;
  margin-bottom: 10px;
  font-size: 14px;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 22px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- Reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */

@media (max-width: 980px) {
  .service-grid,
  .airline-row,
  .capability-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .why-grid,
  .about-grid,
  .contact-grid,
  .detail-block,
  .footer-top {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .brand-text { display: none; }
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; }

  .nav-links,
  .nav-cta {
    display: none;
  }

  .site-nav.is-open .nav-panel {
    display: flex;
  }

  .nav-panel {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: var(--nav-h);
    flex-direction: column;
    gap: 8px;
    padding: 18px 20px 24px;
    background: rgba(244, 247, 249, 0.98);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 16px 30px rgba(27, 62, 81, 0.08);
  }

  .nav-panel a {
    padding: 12px 14px;
    border-radius: 12px;
    font-weight: 600;
    color: var(--ink);
  }

  .nav-panel a.panel-cta {
    background: var(--red);
    color: #fff;
    text-align: center;
  }

  .hero-content { padding: 56px 0 64px; }
  .section { padding: 64px 0; }
  .form-grid,
  .mini-grid,
  .service-grid,
  .airline-row,
  .capability-grid,
  .hero-stats {
    grid-template-columns: 1fr;
  }

  .detail-block {
    gap: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}