:root {
  --navy: #102b49;
  --navy-deep: #081c31;
  --coral: #e76f61;
  --coral-dark: #bd4e46;
  --silver: #aeb8c4;
  --sand: #eee5d7;
  --cloud: #fbfcfd;
  --charcoal: #202a34;
  --muted: #66717c;
  --line: rgba(16, 43, 73, .18);
  --max: 1580px;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body {
  margin: 0;
  background: var(--cloud);
  color: var(--charcoal);
  font-family: var(--sans);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
.skip-link {
  position: fixed;
  top: 10px;
  left: 12px;
  z-index: 1000;
  padding: 9px 14px;
  background: #fff;
  color: #000;
  transform: translateY(-160%);
}
.skip-link:focus { transform: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(251, 252, 253, .96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.header-inner {
  max-width: var(--max);
  min-height: 84px;
  margin: auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  gap: 30px;
}
.brand-mark {
  min-width: 242px;
  display: flex;
  align-items: center;
  gap: 13px;
}
.brand-mark img { width: 48px; height: 48px; object-fit: contain; }
.brand-mark span { display: grid; }
.brand-mark strong { color: var(--navy); font: 600 25px/1.1 var(--serif); letter-spacing: .08em; }
.brand-mark small { margin-top: 5px; color: var(--muted); font-size: 9px; letter-spacing: .2em; }
.terminal-code {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-left: 22px;
  border-left: 1px solid var(--line);
  color: var(--navy);
  font-size: 11px;
}
.terminal-code span { color: var(--coral); font-weight: 800; letter-spacing: .18em; }
.primary-nav { margin-left: auto; display: flex; gap: 26px; }
.primary-nav a {
  position: relative;
  padding: 29px 0 23px;
  color: var(--navy);
  text-decoration: none;
  white-space: nowrap;
  font-size: 13px;
}
.primary-nav a::after {
  content: "";
  position: absolute;
  right: 50%;
  bottom: 18px;
  left: 50%;
  height: 2px;
  background: var(--coral);
  transition: .2s ease;
}
.primary-nav a:hover::after,
.primary-nav a:focus-visible::after,
.primary-nav a.is-active::after { right: 0; left: 0; }
.primary-nav a:focus-visible,
.menu-toggle:focus-visible,
summary:focus-visible { outline: 3px solid var(--coral); outline-offset: 4px; }
.menu-toggle {
  display: none;
  margin-left: auto;
  padding: 9px 0;
  background: none;
  border: 0;
  color: var(--navy);
  font: 600 12px var(--sans);
}
.menu-toggle i,
.menu-toggle i::before,
.menu-toggle i::after { display: block; width: 28px; height: 1px; background: currentColor; }
.menu-toggle i { position: relative; margin-top: 8px; }
.menu-toggle i::before,
.menu-toggle i::after { content: ""; position: absolute; left: 0; }
.menu-toggle i::before { top: -7px; }
.menu-toggle i::after { top: 7px; }

.arrival-hero {
  max-width: var(--max);
  min-height: 660px;
  margin: 48px auto 0;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 56% 44%;
  grid-template-rows: minmax(610px, auto);
}
.arrival-copy {
  position: relative;
  padding: 82px 80px 70px 110px;
  background: var(--sand);
  border: 1px solid var(--line);
  border-right: 0;
}
.vertical-index {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 68px;
  padding: 28px 0;
  border-right: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--navy);
  writing-mode: vertical-rl;
}
.vertical-index b { font: 500 40px var(--serif); }
.vertical-index span { color: var(--coral); font-size: 10px; letter-spacing: .24em; }
.kicker { margin: 0 0 14px; color: var(--coral-dark); font-size: 10px; font-weight: 700; letter-spacing: .23em; }
.official-line {
  display: inline-block;
  margin: 0 0 28px;
  padding: 6px 13px;
  border: 1px solid var(--navy);
  color: var(--navy);
  font-size: 12px;
  letter-spacing: .12em;
}
.arrival-copy h1 {
  max-width: 780px;
  margin: 0;
  color: var(--navy);
  font: 500 clamp(54px, 5.4vw, 88px)/1.12 var(--serif);
  letter-spacing: -.045em;
}
.hero-lead { max-width: 650px; margin: 28px 0 0; color: var(--coral-dark); font: 400 25px/1.55 var(--serif); }
.arrival-window { position: relative; min-width: 0; overflow: hidden; background: var(--navy-deep); }
.arrival-window::before {
  content: "";
  position: absolute;
  z-index: 2;
  inset: 24px;
  border: 1px solid rgba(255, 255, 255, .45);
  pointer-events: none;
}
.arrival-window img { width: 100%; height: 100%; object-fit: cover; }

.shell { max-width: var(--max); margin: auto; padding: 120px 32px; }
.section-code {
  border-top: 1px solid var(--navy);
  padding-top: 13px;
  display: flex;
  justify-content: space-between;
  color: var(--navy);
}
.section-code span { color: var(--coral-dark); font-size: 10px; letter-spacing: .2em; }
.section-code b { font: 500 27px var(--serif); }
.official-position { display: grid; grid-template-columns: 115px .8fr 1.2fr; gap: 60px; }
.position-title h2,
.routes-heading h2,
.board-header h2,
.features-shell h2,
.bulletins-heading h2,
.access-intro h2,
.faq-heading h2,
.info-title h2 {
  margin: 0;
  color: var(--navy);
  font: 500 clamp(42px, 4vw, 66px)/1.18 var(--serif);
  letter-spacing: -.03em;
}
.position-copy { padding-top: 28px; border-top: 1px solid var(--line); color: var(--muted); }
.position-copy p:first-child { margin-top: 0; }

.departure-board { padding: 110px 32px; background: var(--navy-deep); color: #fff; }
.board-shell { max-width: calc(var(--max) - 64px); margin: auto; }
.board-header { margin-bottom: 42px; display: flex; justify-content: space-between; align-items: end; }
.board-header h2 { color: #fff; }
.board-header > p { margin: 0; color: rgba(255, 255, 255, .55); font-size: 12px; }
.board-header time { color: var(--coral); }
.board-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(255, 255, 255, .35); }
.board-grid article { min-height: 300px; padding: 28px; border-right: 1px solid rgba(255, 255, 255, .18); border-bottom: 1px solid rgba(255, 255, 255, .18); }
.board-grid article:last-child { border-right: 0; }
.board-grid span { color: var(--coral); font-size: 10px; letter-spacing: .16em; }
.board-grid h3 { margin: 55px 0 12px; font: 500 28px var(--serif); }
.board-grid p { color: rgba(255, 255, 255, .6); font-size: 13px; }
.board-grid b { display: inline-block; margin-top: 16px; color: var(--sand); font-size: 11px; font-weight: 500; }

.genre-routes { display: grid; grid-template-columns: 115px 1fr; gap: 60px; padding-bottom: 60px; }
.routes-heading { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: end; }
.routes-heading .kicker { grid-column: 1 / 3; }
.routes-heading > p:last-child { margin: 0; color: var(--muted); }
.route-network { grid-column: 1 / 3; margin-top: 55px; }
.genre-route { margin-bottom: 46px; border: 1px solid var(--line); background: #fff; }
.genre-route > header {
  position: relative;
  min-height: 118px;
  padding: 22px 30px;
  display: grid;
  grid-template-columns: 280px 1fr 80px;
  align-items: center;
  gap: 25px;
  background: var(--sand);
  border-bottom: 1px solid var(--line);
}
.genre-route > header::after {
  content: "";
  position: absolute;
  right: 105px;
  bottom: 29px;
  left: 310px;
  height: 1px;
  background: var(--silver);
}
.genre-route > header div { position: relative; z-index: 2; }
.genre-route > header span { color: var(--coral-dark); font-size: 10px; letter-spacing: .18em; }
.genre-route > header h3 { margin: 2px 0 0; color: var(--navy); font: 500 32px var(--serif); }
.genre-route > header p { position: relative; z-index: 2; margin: 0; color: var(--muted); font-size: 12px; }
.genre-route > header b { position: relative; z-index: 2; color: var(--navy); font: 500 15px var(--serif); text-align: right; }
.route-coral > header { box-shadow: inset 6px 0 var(--coral); }
.route-blue > header { box-shadow: inset 6px 0 var(--navy); }
.route-silver > header { box-shadow: inset 6px 0 var(--silver); }
.route-items { display: grid; grid-template-columns: repeat(4, 1fr); }
.route-item { min-width: 0; border-right: 1px solid var(--line); }
.route-item:last-child { border-right: 0; }
.route-item img { width: 100%; height: 250px; object-fit: cover; }
.route-item > div { min-height: 220px; padding: 23px 24px 28px; }
.route-item small { color: var(--coral-dark); font-size: 10px; }
.route-item strong { display: block; margin: 7px 0 10px; color: var(--navy); font: 500 21px/1.35 var(--serif); }
.route-item p { margin: 0; color: var(--muted); font-size: 13px; }

.story-features { padding: 120px 32px; background: var(--sand); }
.features-shell { max-width: calc(var(--max) - 64px); margin: auto; }
.features-shell > header { max-width: 760px; }
.features-shell > header > p:last-child { color: var(--muted); }
.feature-map { margin-top: 60px; display: grid; grid-template-columns: 1.1fr .9fr .9fr; grid-template-rows: repeat(2, 240px); gap: 1px; background: var(--navy); }
.feature-map article { padding: 32px; background: var(--cloud); }
.feature-map .feature-large { grid-row: 1 / 3; padding: 48px; background: var(--navy); color: #fff; }
.feature-map article:last-child { grid-column: 2 / 4; }
.feature-map span { color: var(--coral); font-size: 10px; letter-spacing: .18em; }
.feature-map h3 { margin: 46px 0 12px; color: var(--navy); font: 500 27px var(--serif); }
.feature-map p { margin: 0; color: var(--muted); font-size: 13px; }
.feature-map .feature-large h3 { margin-top: 130px; color: #fff; font-size: 42px; }
.feature-map .feature-large p { color: rgba(255, 255, 255, .65); font-size: 14px; }

.official-bulletins { display: grid; grid-template-columns: 115px .7fr 1.3fr; gap: 60px; }
.bulletin-list { border-top: 2px solid var(--navy); }
.bulletin-list article { padding: 23px 0; display: grid; grid-template-columns: 150px .8fr 1.2fr; gap: 22px; border-bottom: 1px solid var(--line); }
.bulletin-list time,
.bulletin-list span { color: var(--coral-dark); font-size: 11px; }
.bulletin-list h3 { margin: 0; color: var(--navy); font: 500 20px var(--serif); }
.bulletin-list p { margin: 0; color: var(--muted); font-size: 13px; }

.access-terminal { padding: 120px 32px; background: var(--navy); color: #fff; }
.access-shell { max-width: calc(var(--max) - 64px); margin: auto; display: grid; grid-template-columns: .68fr 1.32fr; gap: 80px; }
.access-intro h2 { color: #fff; }
.access-intro > p:last-child { color: rgba(255, 255, 255, .62); }
.service-gates { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid rgba(255, 255, 255, .35); }
.service-gates article { min-height: 260px; padding: 28px; border-right: 1px solid rgba(255, 255, 255, .16); border-bottom: 1px solid rgba(255, 255, 255, .16); }
.service-gates article:nth-child(even) { border-right: 0; }
.service-gates span { color: var(--coral); font-size: 10px; letter-spacing: .18em; }
.service-gates h3 { margin: 42px 0 10px; font: 500 25px var(--serif); }
.service-gates p { color: rgba(255, 255, 255, .62); font-size: 13px; }
.service-gates b { color: var(--sand); font-size: 11px; font-weight: 500; }

.faq { display: grid; grid-template-columns: 115px .65fr 1.35fr; gap: 60px; }
.faq-list { border-top: 2px solid var(--navy); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 21px 48px 21px 0; list-style: none; cursor: pointer; color: var(--navy); font: 500 20px var(--serif); }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 4px; top: 19px; color: var(--coral); font: 400 24px var(--sans); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: 0; padding: 0 48px 24px 0; color: var(--muted); font-size: 13px; }

.official-info { padding: 120px 32px; background: var(--silver); }
.info-shell { max-width: calc(var(--max) - 64px); margin: auto; display: grid; grid-template-columns: .75fr 1.25fr; gap: 80px; }
.info-title > p:last-child { color: #4a5967; }
.info-table { margin: 0; border-top: 2px solid var(--navy); }
.info-table div { padding: 18px 0; display: grid; grid-template-columns: 150px 1fr; gap: 20px; border-bottom: 1px solid rgba(16, 43, 73, .28); }
.info-table dt { color: #4a5967; }
.info-table dd { margin: 0; color: var(--navy); font-weight: 600; }

.site-footer {
  padding: 72px max(32px, calc((100vw - var(--max)) / 2 + 32px)) 30px;
  display: grid;
  grid-template-columns: .8fr 1fr 1fr;
  gap: 50px;
  background: var(--navy-deep);
  color: #fff;
}
.footer-brand { display: flex; align-items: center; gap: 15px; }
.footer-brand img { width: 55px; height: 55px; object-fit: contain; }
.footer-brand div { display: grid; }
.footer-brand strong { font: 500 22px var(--serif); }
.footer-brand span { color: var(--coral); font-size: 12px; }
.site-footer p { margin: 0; color: rgba(255, 255, 255, .62); font-size: 13px; }
.site-footer small { grid-column: 1 / 4; padding-top: 22px; border-top: 1px solid rgba(255, 255, 255, .15); color: rgba(255, 255, 255, .42); }

@media (max-width: 1280px) {
  .primary-nav { gap: 15px; }
  .primary-nav a { font-size: 12px; }
  .arrival-copy { padding-right: 48px; }
  .arrival-copy h1 { font-size: 64px; }
  .route-items { grid-template-columns: repeat(2, 1fr); }
  .route-item:nth-child(2) { border-right: 0; }
  .route-item:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}

@media (max-width: 980px) {
  .header-inner { min-height: 74px; padding: 0 24px; }
  .terminal-code { display: none; }
  .menu-toggle { display: block; }
  .primary-nav {
    display: none;
    position: absolute;
    top: 74px;
    right: 0;
    left: 0;
    margin: 0;
    padding: 18px 24px 26px;
    grid-template-columns: repeat(2, 1fr);
    background: var(--cloud);
    border-bottom: 1px solid var(--line);
  }
  .primary-nav.is-open { display: grid; }
  .primary-nav a { padding: 10px 0; }
  .primary-nav a::after { bottom: 5px; }
  .arrival-hero { margin-top: 30px; padding: 0 24px; grid-template-columns: 1fr; grid-template-rows: auto 480px; }
  .arrival-copy { padding: 70px 50px 60px 100px; border-right: 1px solid var(--line); border-bottom: 0; }
  .arrival-window { grid-row: 2; }
  .official-position,
  .genre-routes,
  .official-bulletins,
  .faq { grid-template-columns: 80px 1fr; gap: 38px; padding: 90px 24px; }
  .position-copy,
  .route-network,
  .bulletin-list,
  .faq-list { grid-column: 2; }
  .board-grid { grid-template-columns: repeat(2, 1fr); }
  .board-grid article:nth-child(even) { border-right: 0; }
  .routes-heading { grid-template-columns: 1fr; }
  .routes-heading .kicker { grid-column: 1; }
  .genre-route > header { grid-template-columns: 230px 1fr 70px; }
  .genre-route > header::after { left: 260px; }
  .feature-map { grid-template-columns: 1fr 1fr; grid-template-rows: auto; }
  .feature-map .feature-large { grid-row: auto; }
  .feature-map article:last-child { grid-column: auto; }
  .feature-map .feature-large h3 { margin-top: 75px; }
  .access-shell,
  .info-shell { grid-template-columns: 1fr; gap: 50px; }
  .site-footer { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / 3; }
  .site-footer small { grid-column: 1 / 3; }
}

@media (max-width: 650px) {
  .brand-mark { min-width: 0; }
  .brand-mark img { width: 42px; height: 42px; }
  .brand-mark strong { font-size: 21px; }
  .brand-mark small { display: none; }
  .primary-nav { grid-template-columns: 1fr; }
  .arrival-hero { margin-top: 18px; padding: 0 14px; grid-template-rows: auto 360px; }
  .arrival-copy { padding: 55px 24px 48px 62px; }
  .vertical-index { width: 42px; }
  .vertical-index b { font-size: 28px; }
  .arrival-copy h1 { font-size: 44px; }
  .hero-lead { font-size: 20px; }
  .arrival-window::before { inset: 14px; }
  .shell,
  .official-position,
  .genre-routes,
  .official-bulletins,
  .faq { padding: 76px 18px; grid-template-columns: 1fr; gap: 30px; }
  .section-code { align-items: center; }
  .position-copy,
  .route-network,
  .bulletin-list,
  .faq-list { grid-column: 1; }
  .position-title h2,
  .routes-heading h2,
  .board-header h2,
  .features-shell h2,
  .bulletins-heading h2,
  .access-intro h2,
  .faq-heading h2,
  .info-title h2 { font-size: 41px; }
  .departure-board,
  .story-features,
  .access-terminal,
  .official-info { padding: 76px 18px; }
  .board-header { display: block; }
  .board-header > p { margin-top: 18px; }
  .board-grid { grid-template-columns: 1fr; }
  .board-grid article { min-height: auto; border-right: 0; }
  .board-grid h3 { margin-top: 30px; }
  .genre-route > header { grid-template-columns: 1fr auto; padding: 22px; }
  .genre-route > header p { grid-column: 1 / 3; }
  .genre-route > header::after { display: none; }
  .route-items { grid-template-columns: 1fr; }
  .route-item,
  .route-item:nth-child(2) { border-right: 0; border-bottom: 1px solid var(--line); }
  .route-item:last-child { border-bottom: 0; }
  .route-item img { height: 320px; }
  .feature-map { grid-template-columns: 1fr; }
  .feature-map article { min-height: 260px; }
  .feature-map .feature-large h3 { margin-top: 70px; }
  .bulletin-list article { grid-template-columns: 1fr; gap: 6px; }
  .service-gates { grid-template-columns: 1fr; }
  .service-gates article { min-height: auto; border-right: 0; }
  .info-table div { grid-template-columns: 1fr; gap: 3px; }
  .site-footer { grid-template-columns: 1fr; padding: 62px 24px 28px; }
  .footer-brand,
  .site-footer small { grid-column: 1; }
}

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