:root{--blue:#102a5e;--red:#ed3f3c;--ice:#edf3fb;--ink:#121a2b;--muted:#667187}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font:16px/1.75 system-ui,-apple-system,"PingFang SC",sans-serif}.rail{position:fixed;left:0;top:0;bottom:0;width:106px;padding:28px 18px;background:var(--blue);color:#fff;z-index:10}.mark{color:#fff;text-decoration:none;display:grid;gap:10px}.mark>span{display:grid;place-items:center;width:54px;height:54px;background:var(--red);font:900 28px Arial;border-radius:50%}.mark b{line-height:1.2}.mark small{font-weight:500;opacity:.65}.rail nav{display:grid;gap:18px;margin-top:72px}.rail nav a{color:#dbe6ff;text-decoration:none;font-size:13px;font-weight:800}.rail nav a:before{content:"";display:inline-block;width:8px;height:2px;background:#6c8bc7;margin-right:7px;vertical-align:middle}main,footer{margin-left:106px}.mast{min-height:620px;display:grid;grid-template-columns:1.25fr .75fr;gap:60px;align-items:center;padding:76px max(34px,calc((100% - 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980px)/2));background:#0b1d41;color:white}footer p{color:#a9bbdc}footer a{color:#ff7772}@media(max-width:760px){.rail{position:sticky;width:auto;height:62px;right:0;bottom:auto;display:flex;align-items:center;padding:9px 15px}.mark{display:flex;align-items:center}.mark>span{width:40px;height:40px;font-size:20px}.mark b{font-size:13px}.rail nav{display:none}main,footer,.status{margin-left:0}.mast{grid-template-columns:1fr;padding:42px 18px 54px;gap:34px}.mast h1{font-size:39px}.mast-copy>p:not(.index-no){font-size:16px}.cover-stack{width:230px}.cover-stack img{box-shadow:14px 14px 0 var(--blue)}.cover-stack span{left:-18px}.status{grid-template-columns:1fr}.status div{padding:14px 18px;border-right:0;border-bottom:1px solid rgba(255,255,255,.25)}.status b{font-size:17px}.timeline,.finish,.faq{padding:54px 18px}.timeline>header{display:block}.timeline ol:before{left:20px}.timeline li{grid-template-columns:42px 1fr;gap:12px}.point{width:42px;height:42px}.timeline article{grid-template-columns:1fr;padding:18px}.timeline article img{width:100%;height:190px;order:-1}.timeline article h3{font-size:21px}.route-table{grid-template-columns:1fr;padding:50px 18px}.finish{grid-template-columns:1fr}.mast-tags span{font-size:12px}}

/* Mobile image regression: preserve intrinsic poster ratio and cap long-screen occupancy. */
@media(max-width:760px){.cover-stack img{height:auto;aspect-ratio:auto;object-fit:contain;max-height:400px}}