.air-guide {
  --air-ink: #15394e;
  --air-text: #435f70;
  --air-line: #d1e1e6;
  max-width: 72rem;
  margin: 0 auto;
  padding: 1.5rem clamp(1rem, 3vw, 2.5rem) 4rem;
  color: var(--air-ink);
}
.air-guide *, .air-guide { box-sizing: border-box; }
.air-guide a { color: #11677a; text-underline-offset: .2em; }
.air-guide a:focus-visible, .air-guide video:focus-visible { outline: 3px solid #dd8b23; outline-offset: 3px; }
.air-breadcrumb, .air-breadcrumb div { display: flex; align-items: center; flex-wrap: wrap; gap: .8rem; }
.air-breadcrumb { justify-content: space-between; margin-bottom: 1rem; }
.air-breadcrumb a { padding: .45rem 0; font-size: .9rem; }
.air-breadcrumb [aria-current] { font-weight: 750; text-decoration-thickness: 2px; }
.air-lead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(12rem, 17rem);
  align-items: center;
  gap: 2rem;
  padding: clamp(1.5rem, 4vw, 3.5rem);
  border-radius: 1.3rem;
  background: linear-gradient(125deg, #102d41, #18546b);
  color: white;
}
.air-intro h1 { margin: 0; max-width: 16ch; font-size: clamp(2.15rem, 4.6vw, 3.8rem); line-height: 1.1; color: white; }
.air-intro > p { max-width: 43ch; margin: 1.2rem 0 1.7rem; font-size: 1.12rem; line-height: 1.65; color: #d4e8ee; }
.air-guide .air-jump { color: #ffce82; font-weight: 700; }
.air-film { margin: 0; text-align: center; }
.air-film video { display: block; margin: 0 auto; width: 100%; aspect-ratio: 9 / 16; border-radius: .65rem; background: #0e2738; }
.air-film figcaption { margin-top: .65rem; font-size: .86rem; line-height: 1.7; color: #d4e8ee; }
.air-film figcaption a { color: white; }
.air-routes { margin: 3rem 0; scroll-margin-top: 12rem; }
.air-routes h2, .air-notes h2 { margin: 0 0 .65rem; font-size: clamp(1.35rem, 2.2vw, 2rem); line-height: 1.28; }
.air-routes > p { margin: 0 0 1.25rem; color: var(--air-text); }
.air-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr)); gap: .9rem; }
.air-card { display: flex; flex-direction: column; margin: 0; padding: 1.1rem; background: #fff; border: 1px solid var(--air-line); border-radius: .85rem; }
.air-card h3 { margin: 0; font-size: 1.15rem; }
.air-map { list-style: none; padding: 1.35rem 0 .95rem; margin: auto 0 0; display: flex; align-items: flex-start; }
.air-station { text-align: center; flex: 0 1 3.8rem; min-width: 0; }
.air-station b { display: block; background: #e2f0f2; color: #134d60; font: 700 .92rem/2.15 system-ui, sans-serif; border-radius: .38rem; }
.air-station span { display: block; font-size: .76rem; line-height: 1.3; color: #395567; margin-top: .28rem; }
.air-leg { display: flex; flex: 1 1 1.8rem; min-width: 1.7rem; flex-direction: column; align-items: center; margin-top: .12rem; padding: 0 .12rem; color: #167487; }
.air-leg span { font: 600 .71rem/1.35 system-ui, sans-serif; }
.air-leg i { position: relative; margin-top: .12rem; width: 100%; border-top: 2px solid currentColor; }
.air-leg i::after { content: ''; position: absolute; right: 1px; top: -4px; width: 5px; height: 5px; border-top: 2px solid; border-right: 2px solid; transform: rotate(45deg); }
.air-leg-road { color: #965314; }
.air-leg-road i { border-top-style: dashed; }
.air-card figcaption { padding-top: .65rem; border-top: 1px solid var(--air-line); font-size: .94rem; color: var(--air-text); line-height: 1.6; }
.air-notes { max-width: 49rem; margin: 0 auto; }
.air-notes > section { padding: 1.5rem 0; border-top: 1px solid var(--air-line); }
.air-notes p, .air-notes li { font-size: 1.02rem; line-height: 1.8; color: var(--air-text); }
.air-notes p { margin: 0; }
.air-notes ul { margin: .3rem 0 0; padding-inline-start: 1.3rem; }
.air-checklist li { margin: .4rem 0; }
@media (max-width: 650px) {
  .air-lead { grid-template-columns: 1fr; gap: 1.2rem; }
  .air-intro h1 { max-width: none; }
  .air-film { width: min(100%, 17rem); margin-inline: auto; }
}