:root {
  --ink: #07111c;
  --ink-soft: #0d2032;
  --blue: #123b60;
  --blue-light: #205a86;
  --ice: #eef7fb;
  --muted: #8ca1b0;
  --line: rgba(16, 45, 68, .2);
  --line-light: rgba(238, 247, 251, .22);
  --cyan: #70f1e5;
  --cyan-soft: #b9fff8;
  --white: #fff;
  --max: 1440px;
  --pad: clamp(1.25rem, 4.2vw, 5.5rem);
  color-scheme: dark;
  font-family: system-ui, "Noto Sans SC", "Microsoft YaHei", sans-serif;
  background: var(--ink);
  color: var(--ice);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; background: var(--ink); }

body { margin: 0; min-width: 280px; overflow-x: hidden; background: var(--ice); color: var(--ink); }

body.menu-open { overflow: hidden; }

img { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

button, input, textarea { font: inherit; }

button { color: inherit; }

:focus-visible { outline: 2px solid var(--cyan); outline-offset: 4px; }

.skip-link { position: fixed; z-index: 30; top: .75rem; left: .75rem; padding: .75rem 1rem; background: var(--cyan); color: var(--ink); transform: translateY(-150%); transition: transform .2s ease; }

.skip-link:focus { transform: translateY(0); }

.edge-marker { position: fixed; z-index: 12; right: 1.2rem; bottom: 1.25rem; display: flex; gap: .35rem; pointer-events: none; }

.edge-marker i { display: block; width: 1.4rem; height: .25rem; background: var(--cyan); opacity: .55; }

.edge-marker i:nth-child(2) { opacity: .38; }
.edge-marker i:nth-child(3) { opacity: .2; }
.edge-marker i:nth-child(4) { opacity: .1; }

.site-header { position: fixed; z-index: 20; top: 0; left: 0; width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 2rem; padding: 1.1rem var(--pad); color: var(--white); transition: background .3s ease, border-color .3s ease, color .3s ease; }

.site-header.scrolled { background: rgba(7, 17, 28, .94); border-bottom: 1px solid rgba(112, 241, 229, .2); backdrop-filter: blur(14px); }

.brand { display: inline-flex; align-items: center; gap: .75rem; position: relative; z-index: 2; }

.brand img { width: 2.75rem; height: 2.75rem; }

.brand-copy { display: grid; gap: .2rem; }

.brand-copy strong { font-size: .92rem; font-weight: 600; letter-spacing: .08em; }

.brand-copy small { color: var(--cyan-soft); font-size: .58rem; letter-spacing: .18em; }

.site-nav { display: flex; align-items: center; gap: clamp(1.2rem, 2.5vw, 3rem); font-size: .77rem; letter-spacing: .09em; }

.site-nav a { position: relative; display: inline-flex; align-items: center; gap: .5rem; padding: .55rem 0; color: rgba(255,255,255,.78); transition: color .2s ease; }

.site-nav a:hover, .site-nav a.active { color: var(--cyan); }

.site-nav a span { color: rgba(112, 241, 229, .65); font-family: "DIN Alternate", "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: .62rem; letter-spacing: .05em; }

.site-nav a:not(.nav-action)::after { position: absolute; right: 0; bottom: .2rem; left: 1.15rem; height: 1px; background: var(--cyan); transform: scaleX(0); transform-origin: right; transition: transform .25s ease; content: ""; }

.site-nav a:not(.nav-action):hover::after, .site-nav a.active::after { transform: scaleX(1); transform-origin: left; }

.site-nav .nav-action { border-bottom: 1px solid var(--cyan); color: var(--cyan); }

.menu-toggle { display: none; position: relative; z-index: 22; align-items: center; gap: .6rem; padding: .4rem 0; border: 0; background: transparent; cursor: pointer; font-size: .74rem; letter-spacing: .14em; }

.menu-icon { display: grid; gap: .35rem; width: 1.4rem; }

.menu-icon i { display: block; height: 1px; width: 100%; background: currentColor; transition: transform .2s ease; }

.menu-toggle[aria-expanded="true"] .menu-icon i:first-child { transform: translateY(.2rem) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-icon i:last-child { transform: translateY(-.2rem) rotate(-45deg); }

.hero { position: relative; min-height: 100svh; display: grid; align-items: end; overflow: hidden; background: var(--ink); color: var(--white); isolation: isolate; }

.hero-image { position: absolute; z-index: -3; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }

.hero-shade { position: absolute; z-index: -2; inset: 0; background: linear-gradient(90deg, rgba(7,17,28,.98) 0%, rgba(7,17,28,.76) 34%, rgba(7,17,28,.16) 80%), linear-gradient(0deg, rgba(7,17,28,.88), transparent 62%); }

.hero-route { position: absolute; z-index: -1; top: 16%; right: 13%; bottom: 12%; width: 1px; background: linear-gradient(var(--cyan), transparent 82%); opacity: .8; }

.hero-route::before, .hero-route::after { position: absolute; left: -.25rem; width: .5rem; height: .5rem; border: 1px solid var(--cyan); border-radius: 50%; content: ""; }

.hero-route::before { top: 19%; background: var(--ink); }
.hero-route::after { top: 66%; background: var(--cyan); box-shadow: 0 0 0 .35rem rgba(112, 241, 229, .12), 0 0 30px rgba(112, 241, 229, .75); }

.hero-route i { position: absolute; left: -2.8rem; width: 2.8rem; height: 1px; background: var(--cyan); opacity: .4; }
.hero-route i:nth-child(1) { top: 19%; }
.hero-route i:nth-child(2) { top: 66%; width: 6.5rem; left: -6.5rem; }
.hero-route i:nth-child(3) { top: 80%; width: 3.8rem; left: -3.8rem; opacity: .2; }

.hero-copy { width: min(calc(100% - 2 * var(--pad)), 760px); margin: 0 var(--pad) clamp(5rem, 12vh, 9.5rem); }

.eyebrow, .micro-label { margin: 0 0 1.5rem; color: var(--cyan); font-family: "DIN Alternate", "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: .64rem; font-weight: 600; letter-spacing: .19em; line-height: 1.5; text-transform: uppercase; }

.eyebrow span { margin: 0 .5rem; color: rgba(255,255,255,.42); }

h1, h2, h3, p { margin-top: 0; }

h1, h2, h3 { font-weight: 500; }

h1 { max-width: 8ch; margin-bottom: 1.75rem; font-family: "DIN Alternate", "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: clamp(4.3rem, 10vw, 9.8rem); letter-spacing: -.085em; line-height: .87; }

h1 span { display: block; }
h1 span:last-child { padding-left: .38em; color: var(--cyan-soft); }

.hero-lead { max-width: 39rem; margin-bottom: 2.25rem; color: rgba(255,255,255,.8); font-size: clamp(1rem, 1.4vw, 1.18rem); line-height: 1.8; }

.line-link { display: inline-flex; align-items: center; gap: .7rem; width: fit-content; border-bottom: 1px solid currentColor; padding: .35rem 0 .65rem; font-size: .78rem; letter-spacing: .13em; transition: color .2s ease, gap .2s ease; }

.line-link:hover { gap: 1rem; color: var(--cyan); }

.line-link svg { width: 1.25rem; height: 1.25rem; fill: none; stroke: currentColor; stroke-linecap: square; stroke-linejoin: miter; stroke-width: 1.5; }

.hero-meta { position: absolute; right: var(--pad); bottom: 2.25rem; display: flex; gap: 2rem; color: rgba(255,255,255,.55); font-family: "DIN Alternate", "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: .59rem; letter-spacing: .15em; writing-mode: vertical-rl; }

.hero-index { position: absolute; right: var(--pad); top: 50%; display: grid; gap: .4rem; color: rgba(255,255,255,.42); font-family: "DIN Alternate", "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: .65rem; letter-spacing: .18em; }

.hero-index b { color: var(--cyan); font-size: .9rem; font-weight: 500; }

.section { position: relative; display: grid; grid-template-columns: 8rem minmax(0, 1fr); column-gap: clamp(1.4rem, 5vw, 7.5rem); padding: clamp(5rem, 10vw, 11rem) var(--pad); background: var(--ice); color: var(--ink); }

.section-index { grid-column: 1; grid-row: 1 / span 4; display: flex; align-items: flex-start; gap: .9rem; padding-top: .25rem; color: var(--blue-light); font-family: "DIN Alternate", "Noto Sans SC", "Microsoft YaHei", sans-serif; }

.section-index span { color: var(--blue-light); font-size: .72rem; letter-spacing: .15em; }

.section-index p { margin: 0; color: rgba(18, 59, 96, .58); font-size: .66rem; letter-spacing: .16em; writing-mode: vertical-rl; }

.about-copy { grid-column: 2; max-width: 76rem; }

.about h2, .route h2, .systems h2, .upgrade h2, .project h2, .contact h2 { max-width: 14ch; margin-bottom: 2.2rem; font-family: "DIN Alternate", "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: clamp(2.8rem, 6.2vw, 6.8rem); letter-spacing: -.075em; line-height: .94; }

.about h2 { max-width: 12ch; }

.about-columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(1.5rem, 5vw, 7rem); max-width: 66rem; margin-bottom: 3.5rem; }

.about-columns p { max-width: 30rem; margin-bottom: 0; color: #38576d; font-size: .95rem; line-height: 1.9; }

.fact-strip { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); }

.fact-strip div { min-height: 7.5rem; padding: 1.25rem 1.35rem 1.25rem 0; border-bottom: 1px solid var(--line); }

.fact-strip div + div { padding-left: 1.35rem; border-left: 1px solid var(--line); }

.fact-strip span, .fact-strip strong { display: block; }
.fact-strip span { margin-bottom: .9rem; color: var(--blue-light); font-family: "DIN Alternate", "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: .63rem; letter-spacing: .16em; }
.fact-strip strong { color: var(--ink); font-size: .92rem; font-weight: 500; line-height: 1.45; }

figure { margin: 0; }

figcaption { display: flex; justify-content: space-between; gap: 1rem; padding-top: .75rem; color: var(--blue-light); font-family: "DIN Alternate", "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: .62rem; letter-spacing: .14em; }

.wide-media { grid-column: 2; margin-top: clamp(3rem, 7vw, 7rem); }

.wide-media img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; object-position: center; }

.dark { background: var(--ink); color: var(--ice); }

.dark .section-index { color: var(--cyan); }
.dark .section-index span { color: var(--cyan); }
.dark .section-index p { color: rgba(185,255,248,.54); }
.dark figcaption { color: var(--cyan-soft); }

.route { grid-template-rows: auto auto; }

.route-intro { grid-column: 2; max-width: 58rem; }

.route-intro h2 { max-width: 12ch; }

.route-intro > p:last-child { max-width: 38rem; margin-bottom: 0; color: var(--muted); font-size: .98rem; line-height: 1.85; }

.route-flow { grid-column: 2; position: relative; margin-top: clamp(4rem, 9vw, 9rem); }

.route-flow::before { position: absolute; top: 0; bottom: 0; left: clamp(.9rem, 4vw, 5rem); width: 1px; background: linear-gradient(var(--cyan), rgba(112,241,229,.08)); content: ""; }

.route-row { position: relative; display: grid; grid-template-columns: minmax(15rem, .8fr) minmax(0, 1.2fr); align-items: center; gap: clamp(2rem, 7vw, 10rem); padding: clamp(2.8rem, 7vw, 7rem) 0 clamp(3rem, 8vw, 8rem); border-top: 1px solid var(--line-light); }

.route-row::before { position: absolute; top: 50%; left: clamp(.68rem, 3.8vw, 4.75rem); width: .5rem; height: .5rem; border: 1px solid var(--cyan); border-radius: 50%; background: var(--ink); box-shadow: 0 0 0 .35rem rgba(112,241,229,.08); content: ""; transform: translate(-50%, -50%); }

.route-row.reverse { grid-template-columns: minmax(0, 1.2fr) minmax(15rem, .8fr); }

.route-row.reverse .route-copy { grid-column: 2; grid-row: 1; }
.route-row.reverse figure { grid-column: 1; grid-row: 1; }

.route-copy { padding-left: clamp(2.8rem, 7vw, 8rem); }

.route-copy > span { display: block; margin-bottom: 1rem; color: var(--cyan); font-family: "DIN Alternate", "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: .64rem; letter-spacing: .18em; }

.route-copy h3 { margin-bottom: 1rem; color: var(--white); font-family: "DIN Alternate", "Noto Sans SC", sans-serif; font-size: clamp(1.65rem, 3vw, 3.25rem); letter-spacing: -.055em; line-height: 1; }

.route-copy p { max-width: 22rem; margin-bottom: 0; color: var(--muted); font-size: .9rem; line-height: 1.8; }

.route-row figure img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }

.route-row figure figcaption { color: rgba(185,255,248,.6); }

.systems { grid-template-rows: auto auto; background: #d9e8ee; color: var(--ink); }

.systems-copy { grid-column: 2; display: grid; grid-template-columns: minmax(0, 1fr) minmax(16rem, .58fr); gap: clamp(2rem, 7vw, 8rem); align-items: end; }

.systems-copy h2 { grid-column: 1; margin-bottom: 0; }

.systems-copy > p:not(.micro-label) { grid-column: 2; margin: 0; color: #38576d; font-size: .95rem; line-height: 1.85; }

.node-list { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; padding: 0; margin: clamp(3rem, 6vw, 6rem) 0 0; border-top: 1px solid rgba(18,59,96,.28); list-style: none; }

.node-list li { position: relative; display: flex; gap: 1rem; min-height: 8.5rem; padding: 1.2rem 1.35rem 1.25rem 0; border-bottom: 1px solid rgba(18,59,96,.28); }

.node-list li + li { padding-left: 1.35rem; border-left: 1px solid rgba(18,59,96,.28); }

.node-list li > span { color: var(--blue-light); font-family: "DIN Alternate", "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: .67rem; letter-spacing: .15em; }

.node-list strong, .node-list small { display: block; }
.node-list strong { margin-bottom: .55rem; font-size: 1rem; font-weight: 600; }
.node-list small { color: #547185; font-size: .78rem; line-height: 1.6; }

.systems-figure { grid-column: 2; margin-top: clamp(4rem, 9vw, 9rem); }

.systems-figure img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }

.upgrade { grid-template-rows: auto auto; }

.upgrade-copy { grid-column: 2; display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, .9fr); gap: clamp(2rem, 8vw, 10rem); align-items: end; }

.upgrade-copy .micro-label, .upgrade-copy h2 { grid-column: 1; }
.upgrade-copy h2 { margin-bottom: 0; }
.upgrade-copy > p:not(.micro-label) { grid-column: 2; margin: 0; max-width: 29rem; color: var(--muted); font-size: .96rem; line-height: 1.85; }
.upgrade-copy .line-link { grid-column: 2; justify-self: start; margin-top: 1.5rem; }

.upgrade-media { grid-column: 2; margin-top: clamp(3.5rem, 8vw, 8rem); }

.upgrade-media img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }

.project { grid-template-rows: auto auto; }

.project-grid { grid-column: 2; display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1fr); gap: clamp(2rem, 8vw, 11rem); }

.project-copy h2 { max-width: 10ch; }

.project-copy > p:last-child { max-width: 26rem; color: #38576d; font-size: .92rem; line-height: 1.85; }

.timeline { border-top: 1px solid var(--line); }

.timeline > div { display: grid; grid-template-columns: minmax(6rem, .42fr) 1fr; gap: 1.4rem; padding: 1.3rem 0 1.4rem; border-bottom: 1px solid var(--line); }

.timeline time { color: var(--blue-light); font-family: "DIN Alternate", "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: clamp(1.15rem, 2vw, 1.65rem); letter-spacing: .04em; }

.timeline p { margin: 0; }
.timeline strong, .timeline span { display: block; }
.timeline strong { margin-bottom: .45rem; font-size: .96rem; font-weight: 600; }
.timeline span { color: #547185; font-size: .78rem; line-height: 1.6; }
.timeline .quiet time, .timeline .quiet strong { color: #6d8799; }

.contact { grid-template-rows: auto auto; }

.contact-copy { grid-column: 2; display: grid; grid-template-columns: minmax(0, 1fr) minmax(15rem, .62fr); gap: clamp(2rem, 8vw, 10rem); align-items: end; }

.contact-copy .micro-label, .contact-copy h2 { grid-column: 1; }
.contact-copy h2 { max-width: 11ch; margin-bottom: 0; }
.contact-copy > p:not(.micro-label) { grid-column: 2; margin: 0; color: var(--muted); font-size: .95rem; line-height: 1.85; }
.contact-copy address { grid-column: 2; margin-top: 1.8rem; padding-top: .9rem; border-top: 1px solid var(--line-light); color: var(--ice); font-size: .88rem; font-style: normal; line-height: 1.6; }
.contact-copy address span { display: block; margin-bottom: .35rem; color: var(--cyan); font-family: "DIN Alternate", "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: .62rem; letter-spacing: .16em; }

.contact-form { grid-column: 2; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.4rem 2rem; margin-top: clamp(4rem, 8vw, 8rem); }

.contact-form label { display: grid; gap: .6rem; }

.contact-form label span { color: var(--cyan-soft); font-family: "DIN Alternate", "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: .64rem; letter-spacing: .15em; }

.contact-form input, .contact-form textarea { width: 100%; border: 0; border-bottom: 1px solid rgba(238,247,251,.38); border-radius: 0; padding: .8rem 0; outline: 0; background: transparent; color: var(--white); transition: border-color .2s ease; }

.contact-form textarea { min-height: 7rem; resize: vertical; }

.contact-form input:focus, .contact-form textarea:focus { border-color: var(--cyan); }

.contact-form input[aria-invalid="true"], .contact-form textarea[aria-invalid="true"] { border-color: #ff9e8b; }

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

.form-action { display: flex; align-items: center; flex-wrap: wrap; gap: 1.5rem; }

.form-action button { display: inline-flex; align-items: center; gap: .7rem; border: 0; border-bottom: 1px solid var(--cyan); padding: .35rem 0 .65rem; background: transparent; color: var(--cyan); cursor: pointer; font-size: .78rem; letter-spacing: .13em; }

.form-action button svg { width: 1.25rem; height: 1.25rem; fill: none; stroke: currentColor; stroke-linecap: square; stroke-linejoin: miter; stroke-width: 1.5; }

.form-status { flex: 1 1 16rem; min-height: 1.4rem; margin: 0; color: var(--cyan-soft); font-size: .78rem; line-height: 1.5; }

.contact-media { grid-column: 2; margin-top: clamp(4rem, 9vw, 9rem); }

.contact-media img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }

.contact-media figcaption { color: rgba(185,255,248,.6); }

.site-footer { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) minmax(8rem, .5fr); gap: 2rem; padding: 2.5rem var(--pad) 1.5rem; background: #050d16; color: var(--ice); }

.footer-brand { display: flex; align-items: center; gap: .8rem; }
.footer-brand img { width: 3rem; height: 3rem; }
.footer-brand p { margin: 0; }
.footer-brand strong, .footer-brand span { display: block; }
.footer-brand strong { font-size: .86rem; font-weight: 600; letter-spacing: .08em; }
.footer-brand span { margin-top: .35rem; color: var(--cyan); font-family: "DIN Alternate", "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: .58rem; letter-spacing: .14em; }

.footer-links { display: flex; flex-wrap: wrap; align-content: center; gap: .8rem 1.35rem; color: var(--muted); font-size: .7rem; letter-spacing: .1em; }
.footer-links a:hover { color: var(--cyan); }
.footer-note { display: flex; justify-content: flex-end; align-items: center; }
.footer-note p { margin: 0; color: rgba(238,247,251,.48); font-size: .64rem; line-height: 1.6; text-align: right; }
.copyright { grid-column: 1 / -1; margin: 1.5rem 0 0; padding-top: 1rem; border-top: 1px solid rgba(238,247,251,.14); color: rgba(238,247,251,.35); font-family: "DIN Alternate", "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: .58rem; letter-spacing: .12em; }

[data-reveal] { opacity: 0; transform: translateY(1.2rem); transition: opacity .7s ease, transform .7s ease; }
[data-reveal].revealed { opacity: 1; transform: none; }

@media (max-width: 1000px) {
  .site-nav { display: none; }
  .menu-toggle { display: inline-flex; }
  .site-nav.open { position: fixed; inset: 0; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 1.2rem; padding: 7rem var(--pad) 4rem; background: rgba(7,17,28,.98); }
  .site-nav.open a { font-size: clamp(1.25rem, 4vw, 2rem); }
  .site-nav.open .nav-action { margin-top: 1rem; font-size: .82rem; }
  .hero-meta { display: none; }
  .systems-copy, .upgrade-copy, .contact-copy { grid-template-columns: 1fr; gap: 2rem; }
  .systems-copy h2, .systems-copy > p:not(.micro-label), .upgrade-copy .micro-label, .upgrade-copy h2, .upgrade-copy > p:not(.micro-label), .upgrade-copy .line-link, .contact-copy .micro-label, .contact-copy h2, .contact-copy > p:not(.micro-label), .contact-copy address { grid-column: 1; }
  .systems-copy > p:not(.micro-label), .upgrade-copy > p:not(.micro-label), .contact-copy > p:not(.micro-label), .contact-copy address { max-width: 38rem; }
  .upgrade-copy .line-link { margin-top: 0; }
  .contact-copy address { margin-top: 0; }
  .project-grid { grid-template-columns: 1fr; gap: 3.5rem; }
}

@media (max-width: 720px) {
  .site-header { padding-top: .8rem; padding-bottom: .8rem; }
  .brand-copy strong { font-size: .78rem; }
  .brand-copy small { font-size: .5rem; }
  .brand img { width: 2.4rem; height: 2.4rem; }
  .hero-copy { margin-bottom: 5rem; }
  .hero-route { right: 10%; top: 18%; bottom: 9%; }
  .hero-index { display: none; }
  .hero h1 { font-size: clamp(3.55rem, 17vw, 6.5rem); }
  .hero-lead { max-width: 27rem; font-size: .9rem; line-height: 1.75; }
  .section { display: block; padding: 5rem var(--pad) 6rem; }
  .section-index { display: flex; margin-bottom: 2.5rem; }
  .section-index p { writing-mode: horizontal-tb; }
  .about h2, .route h2, .systems h2, .upgrade h2, .project h2, .contact h2 { font-size: clamp(2.65rem, 13vw, 5rem); }
  .about-columns, .fact-strip, .node-list, .contact-form { grid-template-columns: 1fr; }
  .about-columns { gap: 1.35rem; margin-bottom: 2.5rem; }
  .fact-strip div, .fact-strip div + div { min-height: auto; padding: 1rem 0; border-left: 0; }
  .fact-strip div + div { border-top: 1px solid var(--line); }
  .wide-media, .route-intro, .route-flow, .systems-copy, .systems-figure, .upgrade-copy, .upgrade-media, .project-grid, .contact-copy, .contact-form, .contact-media { width: 100%; }
  .wide-media, .systems-figure, .upgrade-media, .contact-media { margin-top: 3.5rem; }
  .route-flow { margin-top: 3rem; }
  .route-flow::before { left: .45rem; }
  .route-row, .route-row.reverse { display: flex; flex-direction: column; align-items: stretch; gap: 1.6rem; padding: 3rem 0 4rem; }
  .route-row::before { top: 3rem; left: .2rem; transform: none; }
  .route-copy, .route-row.reverse .route-copy { order: 1; padding-left: 2rem; }
  .route-row figure, .route-row.reverse figure { order: 2; }
  .route-row figure img { aspect-ratio: 1.25 / 1; }
  .systems-copy, .upgrade-copy, .contact-copy { display: grid; }
  .node-list { margin-top: 3rem; }
  .node-list li, .node-list li + li { min-height: auto; padding: 1.2rem 0; border-left: 0; }
  .node-list li + li { border-top: 1px solid rgba(18,59,96,.28); }
  .timeline > div { grid-template-columns: 5.5rem 1fr; gap: 1rem; }
  .contact-form { gap: 1.2rem; margin-top: 3.5rem; }
  .site-footer { grid-template-columns: 1fr; gap: 1.5rem; padding-top: 2.2rem; }
  .footer-note { justify-content: flex-start; }
  .footer-note p { text-align: left; }
  .copyright { margin-top: .5rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: .01ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
}