:root {
  color-scheme: dark;
  --bg: #0d1118;
  --surface: #151c27;
  --ink: #f2f6fd;
  --muted: #b9c4d5;
  --line: #334055;
  --accent: #77baff;
  --max: 1120px;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.7 "Inter",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif; }
a { color: inherit; text-underline-offset: 4px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
p, h1, h2, h3, dl, dd { margin: 0; }
p, dd { color: var(--muted); }
img { display: block; max-width: 100%; }
code { font: 600 .94em ui-monospace,monospace; color: #d8eaff; overflow-wrap: anywhere; }
.wrap { width: min(100%, var(--max)); margin-inline: auto; padding-inline: 28px; }
.skip { position: absolute; top: -10em; left: 16px; }
.skip:focus { top: 12px; z-index: 5; background: var(--bg); }
.mast { border-bottom: 1px solid #26303e; background: #10151d; }
.mast-inner, .foot .wrap { display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.mast-inner { min-height: 68px; }
.wordmark { display: inline-flex; gap: 10px; align-items: baseline; font-weight: 780; text-decoration: none; font-size: 20px; letter-spacing: -.03em; }
.wordmark span { font-weight: 500; font-size: 12px; color: var(--muted); white-space: nowrap; }
.mast nav, .foot nav, .crumbs, .related { display: flex; gap: 21px; flex-wrap: wrap; font-size: 14px; }
.mast nav a, .foot nav a { text-decoration: none; }
.mast nav a:hover, .foot nav a:hover { text-decoration: underline; }
.mast nav [aria-current] { color: var(--accent); }
.hero { position: relative; display: grid; align-items: center; min-height: clamp(460px, 48vw, 630px); background: #10151c; overflow: hidden; }
.hero-photo { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 68% center; }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, #080b10 0%, #0a0d13e8 36%, #0a0d1350 64%, #0a0d130a 100%); }
.hero-copy { position: relative; z-index: 1; padding-block: 70px; }
.eyebrow { color: #b6d9ff; font-size: 14px; font-weight: 650; letter-spacing: .08em; }
h1 { font-size: clamp(42px, 6.2vw, 82px); line-height: 1.12; letter-spacing: -.065em; margin: 16px 0 20px; }
.lead { max-width: 28rem; color: #e1e8f3; font-size: 17px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.button { display: inline-flex; align-items: center; min-height: 48px; padding: 10px 20px; border: 1px solid #7aa2cc; border-radius: 6px; font-weight: 720; font-size: 15px; text-decoration: none; }
.primary { background: #a5d4ff; color: #10243b; border-color: #a5d4ff; }
.primary:hover { background: #d4eaff; }
.secondary { background: #131d2c; color: var(--ink); }
.secondary:hover { background: #243951; }
.journey { padding-block: 60px 54px; display: grid; grid-template-columns: .82fr 1.18fr; gap: clamp(26px, 6vw, 80px); }
h2 { font-size: clamp(24px, 3vw, 38px); letter-spacing: -.045em; line-height: 1.25; margin-bottom: 10px; }
h3 { font-size: 21px; line-height: 1.35; margin-bottom: 6px; }
.route-list { position: relative; --progress: 0; }
.route-list::before, .route-list::after { content: ""; position: absolute; left: 5px; top: 12px; bottom: 24px; width: 1px; }
.route-list::before { background: var(--line); }
.route-list::after { background: var(--accent); transform-origin: top; transform: scaleY(var(--progress)); transition: transform .25s ease; }
.route-stop { position: relative; padding: 0 0 29px 32px; }
.route-stop:last-child { padding-bottom: 5px; }
.route-stop::before { content: ""; position: absolute; left: 0; top: 7px; width: 11px; height: 11px; border: 1px solid #7996b9; border-radius: 50%; background: #152135; z-index: 1; transition: background .22s ease, box-shadow .22s ease; }
.route-stop[data-active]::before { background: #9fd2ff; box-shadow: 0 0 12px #68afffc9; }
.route-stop[data-active] h3 { color: #b5dbff; }
.inline-action { display: inline-block; color: var(--accent); margin-top: 8px; }
.guides { border-top: 1px solid var(--line); padding-block: 38px 45px; background: #111823; }
.guide-index { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.guide-entry { padding: 13px 0; border-top: 1px solid var(--line); }
.guide-entry h3 { font-size: 17px; }
.guide-entry p { font-size: 14px; }
.foot { border-top: 1px solid var(--line); background: #10151d; }
.foot .wrap { padding-block: 23px; }
.foot p { max-width: 35rem; font-size: 13px; }
.inner, .article-shell { max-width: 830px; padding-block: 44px 54px; }
.page-head { margin-bottom: 26px; }
.page-head h1 { font-size: clamp(34px, 4.7vw, 53px); }
.inner section, .guide-body section { margin-top: 26px; }
.inner p+p, .guide-body p+p { margin-top: 9px; }
.inner h2, .guide-body h2 { font-size: clamp(21px, 3vw, 27px); }
.panel { background: var(--surface); border-left: 2px solid #719ac4; padding: 19px 22px; }
.panel ol { margin: 9px 0 0; padding-left: 1.45em; color: var(--muted); }
.panel li+li { margin-top: 5px; }
.facts div+div { margin-top: 11px; }
.facts dt { font-weight: 700; }
.related { margin-top: 23px; color: var(--accent); }
.guide-copy time { color: var(--muted); font-size: 13px; }
.guide-body a { color: var(--accent); }
@media (max-width: 700px) {
  .wrap { padding-inline: 18px; }
  .mast-inner { min-height: 62px; gap: 7px; }
  .wordmark { font-size: 17px; gap: 7px; }
  .mast .wordmark span { display: none; }
  .mast nav, .foot nav { gap: 11px; font-size: 13px; }
  .hero { display: flex; flex-direction: column; min-height: 0; }
  .hero-copy { order: -1; padding-block: 32px 25px; }
  .hero-photo { position: static; height: auto; max-height: 260px; aspect-ratio: 16/8; object-position: 86% 50%; }
  .hero::after { display: none; }
  .hero h1 { margin: 9px 0 15px; }
  .lead { font-size: 15px; }
  .hero-actions { margin-top: 18px; gap: 8px; }
  .button { padding-inline: 13px; font-size: 14px; }
  .journey { display: block; padding-block: 33px 34px; }
  .journey-intro { margin-bottom: 24px; }
  .guides { padding-block: 29px; }
  .guide-index { grid-template-columns: 1fr; gap: 2px; }
  .foot .wrap { flex-direction: column; align-items: flex-start; gap: 12px; }
  .inner, .article-shell { padding-block: 25px 38px; }
  .panel { padding: 14px 15px; }
}
@media (prefers-reduced-motion: reduce) {
  .route-list::after, .route-stop::before { transition: none; }
  .route-list::after { display: none; }
}