:root {
  --ink: #09171d;
  --muted: #5b696f;
  --line: #dce5e5;
  --paper: #f4f7f5;
  --white: #ffffff;
  --green: #18b66b;
  --green-deep: #0b7258;
  --blue: #216aa0;
  --night: #06171f;
  --max: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.62;
}

body.nav-open { overflow: hidden; }

h1, h2, h3, p { text-wrap: pretty; }

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

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 18px;
  color: #fff;
  background: var(--green-deep);
  transform: translateY(-200%);
}
.skip-link:focus { transform: none; }
#main-content { scroll-margin-top: 74px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  padding: 0 clamp(22px, 5vw, 74px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(220, 229, 229, 0.86);
  backdrop-filter: blur(18px);
}

.brand { display: inline-flex; align-items: center; flex: 0 0 auto; }

.brand-logo { width: 102px; height: auto; }

.nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2vw, 30px);
  font-size: 14px;
  white-space: nowrap;
}

.nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 74px;
  color: #26363c;
  transition: color 160ms ease;
}

.nav a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  content: "";
  background: var(--green);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.nav a:hover,
.nav a.active { color: var(--green-deep); }

.nav a:hover::after,
.nav a.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav .nav-contact {
  min-height: 42px;
  padding: 0 18px;
  color: #fff;
  background: var(--green-deep);
  border-radius: 999px;
  transition: color 160ms ease, background 160ms ease, transform 160ms ease;
}

.nav .nav-contact::after { display: none; }
.nav .nav-contact:hover { color: #fff; background: #095f4a; transform: translateY(-1px); }

.menu-toggle {
  display: none;
  padding: 8px 0;
  color: var(--ink);
  background: none;
  border: 0;
  font: inherit;
}

.hero {
  position: relative;
  min-height: clamp(500px, 62vh, 640px);
  overflow: hidden;
  color: #fff;
  isolation: isolate;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  background: #06222d url("./assets/hero-forest-infinity-right-20260914.webp") right center / cover no-repeat;
}

.hero-media::before {
  position: absolute;
  inset: 0;
  content: "";
  background:
    linear-gradient(90deg, rgba(3, 18, 24, 0.72) 0%, rgba(3, 25, 26, 0.36) 50%, rgba(3, 18, 24, 0.03) 100%),
    linear-gradient(0deg, rgba(3, 18, 24, 0.28), transparent 46%);
}

.hero-content {
  width: min(var(--max), calc(100% - 44px));
  margin: 0 auto;
  padding: clamp(92px, 12vh, 138px) 0 58px;
}

.hero h1 {
  max-width: 940px;
  margin: 0;
  font-size: clamp(38px, 5.4vw, 72px);
  font-weight: 650;
  letter-spacing: -0.04em;
  line-height: 1.08;
}

.hero h1 span { display: block; }

.hero-content > p {
  max-width: 620px;
  margin: 30px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(17px, 1.6vw, 21px);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 30px;
  padding-bottom: 6px;
  color: var(--green-deep);
  border-bottom: 1px solid currentColor;
  font-weight: 700;
}

.text-link span { transition: transform 160ms ease; }
.text-link:hover span { transform: translate(3px, -3px); }
.text-link.light { color: #fff; }

.section,
.section-inner {
  width: min(var(--max), calc(100% - 44px));
  margin: 0 auto;
}

.section { padding: clamp(64px, 7.5vw, 104px) 0; }

.value-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  padding-top: clamp(38px, 4.5vw, 60px);
  padding-bottom: clamp(38px, 4.5vw, 60px);
  background: var(--line);
}

.value-panel {
  position: relative;
  min-height: 450px;
  padding: clamp(34px, 4.5vw, 58px);
  overflow: hidden;
  transition: transform 220ms ease;
}

.value-panel:hover { transform: translateY(-4px); }

.hydrogen-value {
  color: #fff;
  background:
    linear-gradient(135deg, rgba(16, 122, 104, 0.94), rgba(3, 54, 57, 0.86)),
    url("./assets/hydrogen.webp") right 7% bottom 9% / 45% auto no-repeat;
}

.carbon-value {
  color: #fff;
  background:
    linear-gradient(135deg, rgba(13, 21, 25, 0.93), rgba(18, 45, 49, 0.78)),
    url("./assets/carbon-black.webp") right 10% bottom 12% / 34% auto no-repeat;
}

.value-panel h2 {
  max-width: 460px;
  margin: 38px 0 18px;
  font-size: clamp(34px, 3.8vw, 52px);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.value-panel p { max-width: 390px; margin: 0; color: rgba(255,255,255,0.78); font-size: 17px; }

.panel-link {
  position: absolute;
  bottom: 40px;
  left: clamp(34px, 4.5vw, 58px);
  padding-bottom: 5px;
  border-bottom: 1px solid rgba(255,255,255,0.55);
  font-weight: 700;
}

.editorial-route {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  min-height: 600px;
  background: var(--paper);
}

.editorial-route.reverse { grid-template-columns: minmax(360px, 0.92fr) minmax(0, 1.08fr); }
.editorial-route.reverse .route-visual { order: 2; }

.route-visual { min-height: 540px; background-position: center; background-size: cover; }
.route-technology .route-visual { background-image: url("./assets/hero-technology.webp"); }
.route-products .route-visual { background-image: url("./assets/hero-products.webp"); }
.route-markets .route-visual { background-image: url("./assets/hero-markets-park-river-20260915.webp"); background-position: 64% center; }

.route-copy {
  align-self: center;
  max-width: 620px;
  padding: clamp(46px, 6vw, 84px);
}

.route-copy h2,
.simple-heading h2,
.lead-title h2,
.feature-band h2,
.home-contact h2,
.market-heading h2,
.contact h2,
.news-placeholder h2 {
  margin: 0;
  font-size: clamp(30px, 3.5vw, 48px);
  font-weight: 610;
  letter-spacing: -0.035em;
  line-height: 1.12;
}

.route-copy p { margin: 20px 0 0; color: var(--muted); font-size: 17px; line-height: 1.72; }

.simple-heading { max-width: 720px; }
.simple-heading.wide-heading { max-width: 860px; }
.simple-heading p { margin: 14px 0 0; color: var(--muted); font-size: 16px; }

.milestones-home { background: #fff; }

.milestone-line {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 42px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.milestone-line a { min-height: 160px; padding: 28px 22px; border-right: 1px solid var(--line); }
.milestone-line a:first-child { padding-left: 0; }
.milestone-line a:last-child { border-right: 0; }
.milestone-line strong { display: block; color: var(--green-deep); font-size: clamp(24px, 2.5vw, 34px); }
.milestone-line span { display: block; margin-top: 12px; color: var(--muted); font-size: 14px; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 12px 22px;
  color: var(--ink);
  background: #fff;
  font-weight: 750;
}

.page-hero {
  position: relative;
  display: grid;
  align-items: end;
  min-height: 440px;
  padding: clamp(100px, 11vw, 140px) max(22px, calc((100vw - var(--max)) / 2)) 62px;
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}

.page-hero::before,
.page-hero::after { position: absolute; inset: 0; z-index: -1; content: ""; }
.page-hero::before { background-position: center; background-size: cover; transform: scale(1.02); }
.page-hero::after { background: linear-gradient(90deg, rgba(3,18,24,.9), rgba(3,24,28,.5) 58%, rgba(3,18,24,.08)); }
.tech-hero::before { background-image: url("./assets/hero-technology.webp"); }
.products-hero::before { background-image: url("./assets/hero-products.webp"); }
.markets-hero::before { background-image: url("./assets/hero-markets-park-river-20260915.webp"); }
.company-hero::before { background-image: url("./assets/hero-company.webp"); }
.news-hero::before { background-image: url("./assets/hero-wind-lake-20260914.webp"); background-position: center 20%; transform: none; }

.page-hero > div { width: min(850px, 100%); }
.page-hero h1 { margin: 0; font-size: clamp(38px, 5vw, 64px); font-weight: 620; letter-spacing: -0.035em; line-height: 1.1; }
.page-hero p { max-width: 680px; margin: 18px 0 0; color: rgba(255,255,255,.82); font-size: 18px; }

.lead-section,
.dual-value,
.advanced-carbon {
  display: grid;
  grid-template-columns: minmax(260px, .72fr) minmax(420px, 1.28fr);
  gap: clamp(38px, 6vw, 84px);
  align-items: start;
}

.lead-copy .large-copy,
.large-copy {
  margin: 0;
  color: #233238;
  font-size: clamp(20px, 2vw, 26px);
  line-height: 1.55;
}

.split-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  margin-top: 40px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.split-facts strong { display: block; font-size: 22px; }
.split-facts span { display: block; margin-top: 8px; color: var(--muted); }

.dark-section { color: #fff; background: var(--night); }
.dark-section .section-inner { padding: clamp(64px, 7.5vw, 104px) 0; }
.light-heading p { color: rgba(255,255,255,.68); }

.process-flow {
  display: grid;
  grid-template-columns: 1fr 1.15fr 1fr;
  gap: 32px;
  align-items: stretch;
  margin-top: 46px;
}

.process-stage,
.process-output-stage {
  position: relative;
  min-height: 240px;
  padding: 30px;
  border: 1px solid rgba(255,255,255,.2);
}

.process-stage {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.process-stage::after {
  position: absolute;
  top: 50%;
  right: -31px;
  width: 16px;
  height: 16px;
  content: "";
  border-top: 1px solid var(--green);
  border-right: 1px solid var(--green);
  transform: rotate(45deg);
}

.process-stage span,
.process-output-stage span,
.advantage-list article > span,
.carbon-principles article > span,
.cooperation-list article > span { color: var(--green); font-size: 13px; font-weight: 800; }

.process-stage strong { display: block; margin: 0; font-size: 26px; }
.process-stage p { margin: 12px 0 0; color: rgba(255,255,255,.66); }
.main-stage { background: linear-gradient(140deg, rgba(24,182,107,.18), rgba(33,106,160,.12)); border-color: rgba(24,182,107,.5); }
.process-output-stage { display: grid; grid-template-rows: repeat(2, 1fr); gap: 1px; padding: 0; background: rgba(255,255,255,.15); }
.process-output-stage div { display: flex; flex-direction: column; justify-content: center; padding: 28px; background: var(--night); }
.process-output-stage strong { margin: 0; font-size: 24px; }

.target-metrics,
.capacity-line {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 36px;
  border-top: 1px solid rgba(255,255,255,.18);
  border-bottom: 1px solid rgba(255,255,255,.18);
}

.target-metrics div,
.capacity-line div { padding: 28px 20px; border-right: 1px solid rgba(255,255,255,.18); }
.target-metrics div:last-child,
.capacity-line div:last-child { border-right: 0; }
.target-metrics strong,
.capacity-line strong { display: block; font-size: clamp(24px, 3vw, 38px); }
.target-metrics span,
.capacity-line span { display: block; margin-top: 8px; color: rgba(255,255,255,.62); }

.advantage-list {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 16px;
  margin-top: 48px;
}

.cooperation-list article {
  min-height: 230px;
  padding: 30px;
}

.cooperation-list article {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.advantage-card {
  grid-column: span 3;
  min-width: 0;
  min-height: 270px;
  padding: 0;
  color: #fff;
  background: transparent;
  border: 0;
  font: inherit;
  text-align: left;
  cursor: pointer;
  perspective: 1200px;
}

.advantage-card:nth-child(n + 5) { grid-column: span 4; }

.advantage-card-inner {
  position: relative;
  display: block;
  width: 100%;
  min-height: 270px;
  transform-style: preserve-3d;
  transition: transform 520ms cubic-bezier(.2,.7,.2,1);
}

.advantage-card.is-flipped .advantage-card-inner { transform: rotateY(180deg); }

.advantage-front,
.advantage-back {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 26px;
  overflow: hidden;
  border: 1px solid rgba(8, 48, 47, .12);
  backface-visibility: hidden;
}

/* Keep the existing image shade above its photograph, behind the title. */
.advantage-front { isolation: isolate; }

.advantage-front::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background: linear-gradient(180deg, rgba(4,20,25,.04) 18%, rgba(4,24,27,.9) 100%);
}

.advantage-front strong,
.advantage-back strong { font-size: clamp(21px, 2vw, 28px); line-height: 1.25; }
.advantage-front small { margin-top: 9px; color: rgba(255,255,255,.72); font-size: 12px; }
.advantage-back { justify-content: center; gap: 14px; color: var(--ink); background: #e9f5f0; transform: rotateY(180deg); }
.advantage-back > span { color: var(--muted); font-size: 15px; line-height: 1.62; }
.advantage-card:nth-child(even) .advantage-back { background: #eaf1f5; }
.advantage-card:focus-visible { outline: 3px solid rgba(24,182,107,.45); outline-offset: 4px; }

.card-capacity .advantage-front { background: url("./assets/technology-capacity-custom-v2.webp") center / cover; }
.card-distributed .advantage-front { background: url("./assets/market-chemical-v2.webp") center / cover; }
.card-fast .advantage-front { background: url("./assets/hero-technology.webp") center / cover; }
.card-green .advantage-front { background: url("./assets/product-hydrogen-landscape-v2.webp") center / cover; }
.card-power .advantage-front { background: url("./assets/market-fuelcell-v2.webp") center / cover; }
.card-price .advantage-front { background: url("./assets/hero-products.webp") center / cover; }
.card-module .advantage-front { background: url("./assets/hero-scaleup.webp") center / cover; }

.advantage-list h3,
.carbon-principles h3,
.cooperation-list h3 { margin: 40px 0 10px; font-size: 22px; }
.advantage-list h3 { margin-top: 28px; }
.advantage-list p,
.cooperation-list p { margin: 0; color: var(--muted); }

.feature-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: clamp(60px, 7vw, 96px) max(22px, calc((100vw - var(--max)) / 2));
  color: #fff;
  background: linear-gradient(120deg, #0c6e60, #123c50);
}

.feature-band p { max-width: 700px; margin: 18px 0 0; color: rgba(255,255,255,.72); font-size: 17px; }
.feature-number { color: rgba(255,255,255,.2); font-family: Georgia, serif; font-size: clamp(54px, 9vw, 126px); white-space: nowrap; }

.evidence-section { display: flex; align-items: end; justify-content: space-between; gap: 40px; }

.product-story {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(400px, 1.08fr);
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
}

.product-story::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: -24px;
  width: 2px;
  content: "";
  background: linear-gradient(180deg, transparent, var(--green) 22%, var(--green) 78%, transparent);
}
.product-image { min-height: 520px; background-position: center; background-size: cover; }
.hydrogen-image { background-image: linear-gradient(150deg, rgba(3,38,39,.04), rgba(11,114,88,.1)), url("./assets/product-hydrogen-landscape-v2.webp"); }
.product-kicker { display: block; margin-bottom: 16px; color: var(--green-deep); font-size: 12px; font-weight: 800; letter-spacing: .18em; }
.light-heading .product-kicker { color: var(--green); }
.product-story-copy h2 { margin: 0 0 18px; font-size: clamp(36px, 4.8vw, 60px); font-weight: 620; }

.emission-standard { margin-top: 28px; padding: 22px; background: #f3f8f5; border-top: 1px solid #b7ddd0; border-bottom: 1px solid #b7ddd0; }
.standard-title { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 18px; margin-bottom: 18px; font-size: 13px; }
.standard-title span { color: var(--green-deep); font-weight: 700; }
.standard-thresholds { margin: 0; font-size: 14px; font-variant-numeric: tabular-nums; }
.standard-thresholds div { display: grid; grid-template-columns: 76px minmax(0, 1fr); gap: 12px; padding: 10px 0; border-top: 1px solid #cee2da; }
.standard-thresholds dt { color: var(--green-deep); font-weight: 700; }
.standard-thresholds dd { margin: 0; }
.standard-thresholds dd span { display: inline-block; white-space: nowrap; }
.standard-note { margin: 12px 0 0; color: #475e56; font-size: 12px; line-height: 1.7; }
.milestone-heading { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 14px 24px; max-width: none; }
.diagram-scroll-hint { display: none; }
@media (max-width: 1080px) {
  .diagram-scroll-hint { display: block; margin: 28px 0 10px; color: #b3d3e0; font-size: 13px; }
  .diagram-scroll-hint + .operating-figure { margin-top: 0; }
}

.product-points { margin: 30px 0 0; border-top: 1px solid var(--line); }
.product-points div { display: grid; grid-template-columns: 130px 1fr; gap: 20px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.product-points dt { font-weight: 750; }
.product-points dd { margin: 0; color: var(--muted); }

.carbon-principles {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 46px;
  border-top: 1px solid rgba(255,255,255,.18);
  border-left: 1px solid rgba(255,255,255,.18);
}

.carbon-principles article { min-height: 230px; padding: 28px; border-right: 1px solid rgba(255,255,255,.18); border-bottom: 1px solid rgba(255,255,255,.18); }
.carbon-principles h3 { margin-top: 18px; }
.carbon-principles p { margin: 0; color: rgba(255,255,255,.62); }

.target-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.validation-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 60px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.validation-metrics article { min-height: 180px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.validation-metrics strong { display: block; color: var(--green-deep); font-size: clamp(22px, 2.6vw, 32px); }
.validation-metrics p { margin: 12px 0 0; color: var(--muted); font-size: 14px; }

.comparison-wrap { margin-top: 50px; overflow-x: auto; }
.comparison-wrap table { width: 100%; min-width: 860px; border-collapse: collapse; }
.comparison-wrap caption { padding: 0 0 18px; text-align: left; font-size: 20px; font-weight: 700; }
.comparison-wrap th,
.comparison-wrap td { padding: 18px; text-align: left; border-bottom: 1px solid var(--line); }
.comparison-wrap thead th { color: #405057; font-size: 13px; font-weight: 650; }
.comparison-wrap tbody th { font-size: 15px; }
.highlight-row { color: #0a654e; background: #edf8f3; }

.scaleup-section { color: #fff; background: linear-gradient(120deg, #0b2632, #07171f); }
.scaleup-section .section-inner { padding: clamp(64px, 7.5vw, 104px) 0; }

.project-note { display: flex; gap: 30px; margin-top: 30px; padding: 24px 0; border-top: 1px solid rgba(255,255,255,.18); border-bottom: 1px solid rgba(255,255,255,.18); }
.project-note p { margin: 0; color: rgba(255,255,255,.7); }

.advanced-carbon { padding-top: 120px; padding-bottom: 120px; }

.market-capacity { background: var(--paper); }
.market-capacity .section-inner { padding: 100px 0; }
.market-capacity .capacity-line { color: var(--ink); border-color: var(--line); }
.market-capacity .capacity-line div { border-color: var(--line); }
.market-capacity .capacity-line span { color: var(--muted); }

.company-intro { display: grid; grid-template-columns: minmax(420px, 1fr) minmax(0, 1fr); gap: clamp(40px, 6vw, 80px); align-items: center; }
.company-copy h2 { max-width: 650px; margin: 0 0 28px; font-size: clamp(32px, 3.8vw, 50px); line-height: 1.22; }
.company-copy .large-copy { max-width: 680px; font-size: clamp(18px, 1.55vw, 22px); line-height: 1.6; }
.company-copy > p:last-child { margin: 28px 0 0; color: var(--muted); font-size: 17px; }
.company-photo { min-height: 520px; background: url("./assets/hero-company.webp") center / cover; }

.engineering-path { color: #fff; background: linear-gradient(120deg, #0b2632, #07171f); }
.engineering-path .section-inner { padding: clamp(64px, 7.5vw, 104px) 0; }
.path-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 46px;
  border-top: 1px solid rgba(255,255,255,.2);
  border-left: 1px solid rgba(255,255,255,.2);
}
.path-steps article { min-height: 210px; padding: 30px; border-right: 1px solid rgba(255,255,255,.2); border-bottom: 1px solid rgba(255,255,255,.2); }
.path-steps time { color: var(--green); font-size: 13px; font-weight: 800; }
.path-steps h3 { margin: 40px 0 10px; font-size: 22px; }
.path-steps p { margin: 0; color: rgba(255,255,255,.64); }

.cooperation-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: 46px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }

.operating-figure {
  margin: 46px 0 0;
  overflow-x: auto;
  border: 1px solid rgba(94, 168, 255, .18);
  background: radial-gradient(circle at 52% 42%, rgba(21, 79, 111, .22), transparent 44%), #06171f;
  scrollbar-color: rgba(94, 168, 255, .48) transparent;
}

.operating-diagram {
  display: block;
  width: 100%;
  min-width: 1080px;
  height: auto;
  font-family: inherit;
}

.operating-diagram .relationship-line {
  fill: none;
  stroke: #458fd4;
  stroke-width: 2;
}

.operating-diagram .flow-line {
  fill: none;
  stroke: #53a3eb;
  stroke-width: 2.2;
}

.operating-diagram .node-main {
  fill: url(#operating-node-gradient);
  stroke: #62adf2;
  stroke-width: 1.8;
}

.operating-diagram .node-product {
  fill: #07131a;
  stroke: #3d91de;
  stroke-width: 1.8;
}

.operating-diagram .node-hydrogen {
  fill: url(#operating-hydrogen-gradient);
  stroke: #39b7ee;
  stroke-width: 1.8;
}

.operating-diagram .node-title {
  fill: #fff;
  font-size: 24px;
  font-weight: 750;
  text-anchor: middle;
}

.operating-diagram .terminal-title { font-size: 19px; }
.operating-diagram .flow-label { fill: rgba(255, 255, 255, .82); font-size: 17px; font-weight: 650; text-anchor: middle; }
.operating-diagram .loop-label { fill: #fff; font-size: 21px; font-weight: 750; text-anchor: middle; letter-spacing: .04em; }

.contact {
  display: grid;
  grid-template-columns: minmax(350px, 1fr) minmax(360px, 460px);
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
  padding: clamp(64px, 7.5vw, 104px) max(22px, calc((100vw - var(--max)) / 2));
  background: var(--paper);
}

.contact-content > p { margin: 20px 0 0; color: var(--muted); font-size: 17px; }
.contact-methods { display: grid; gap: 8px; margin-top: 34px; color: #33434a; }
.contact-methods a { font-weight: 700; }

.contact-form { display: grid; gap: 15px; padding: 34px; background: #fff; border: 1px solid var(--line); box-shadow: 0 24px 70px rgba(3,31,38,.08); }
.contact-form label { display: grid; gap: 7px; color: #33434a; font-size: 13px; }
.contact-form input,
.contact-form textarea { width: 100%; padding: 11px 12px; color: var(--ink); background: #fafcfa; border: 1px solid #cfdada; border-radius: 0; outline: none; font: inherit; resize: vertical; }
.contact-form input:focus,
.contact-form textarea:focus { border-color: var(--green); }
.contact-form button { min-height: 48px; color: #fff; background: var(--green-deep); border: 0; font: inherit; font-weight: 750; cursor: pointer; }
.form-note { color: var(--muted); font-size: 12px; }

.news-placeholder { min-height: 500px; padding: 130px 22px; text-align: center; }
.news-placeholder > span { display: block; margin-bottom: 28px; color: #aeb9b8; font-size: 13px; letter-spacing: .25em; }

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 34px clamp(22px, 5vw, 74px);
  color: rgba(255,255,255,.62);
  background: #050f14;
  font-size: 13px;
}

.footer strong,
.footer span { display: block; }
.footer strong { color: #fff; font-size: 15px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 22px; }
.footer-links a:hover { color: #fff; }

section[id] { scroll-margin-top: 124px; }

/* V1 detail polish: preserve layout, imagery and copy. */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 4px;
  box-shadow: 0 0 0 2px #fff;
}
.contact-form input:focus-visible,
.contact-form textarea:focus-visible {
  outline: 2px solid var(--green-deep);
  outline-offset: 2px;
}
.contact-form input,
.contact-form textarea { font-size: 16px; }
.contact-form label { font-size: 14px; }
.footer-links { align-items: center; }
.footer-links a { display: inline-flex; align-items: center; min-height: 44px; }
.milestone-line strong,
.capacity-line strong { font-variant-numeric: tabular-nums; }

@media (max-width: 1080px) {
  .nav { gap: 16px; font-size: 13px; }
  .editorial-route,
  .editorial-route.reverse { grid-template-columns: 1fr 1fr; }
  .route-copy { padding: 52px; }
  .advantage-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .advantage-card,
  .advantage-card:nth-child(n + 5) { grid-column: auto; }
  .carbon-principles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .operating-diagram { min-width: 1020px; }
}

@media (max-width: 860px) {
  .site-header { min-height: 68px; }
  .brand-logo { width: 92px; }
  .menu-toggle { display: block; }
  .nav {
    position: fixed;
    top: 68px;
    right: 0;
    bottom: 0;
    left: 0;
    display: none;
    align-content: start;
    align-items: stretch;
    gap: 0;
    padding: 22px;
    overflow-y: auto;
    background: rgba(255,255,255,.98);
  }
  .nav.open { display: grid; }
  .nav a { min-height: 54px; border-bottom: 1px solid var(--line); font-size: 16px; }
  .nav a::after { display: none; }
  .nav .nav-contact { justify-content: center; min-height: 50px; margin-top: 18px; border-bottom: 0; border-radius: 0; }
  .value-panel { min-height: 440px; }
  .editorial-route,
  .editorial-route.reverse { grid-template-columns: 1fr; }
  .editorial-route.reverse .route-visual { order: 0; }
  .route-visual { min-height: 430px; }
  .route-copy { max-width: none; padding: 64px 30px 82px; }
  .milestone-line { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .milestone-line a:nth-child(2) { border-right: 0; }
  .milestone-line a:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .lead-section,
  .dual-value,
  .advanced-carbon,
  .product-story,
  .company-intro { grid-template-columns: 1fr; }
  .process-flow { grid-template-columns: 1fr; gap: 30px; }
  .process-stage::after { top: auto; right: 50%; bottom: -21px; transform: rotate(135deg); }
  .process-output-stage { grid-template-columns: repeat(2, 1fr); grid-template-rows: 1fr; }
  .operating-figure { margin-top: 42px; }
  .operating-diagram { min-width: 980px; }
  .contact { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .hero { min-height: 560px; }
  .hero-content { padding-top: 92px; }
  .hero h1 { font-size: 36px; line-height: 1.16; }
  .value-pair { grid-template-columns: 1fr; width: 100%; }
  .value-panel { min-height: 430px; }
  .value-panel h2 { margin-top: 48px; font-size: 36px; }
  .panel-link { bottom: 34px; }
  .feature-band,
  .evidence-section { align-items: flex-start; flex-direction: column; }
  .milestone-line { grid-template-columns: 1fr; }
  .milestone-line a { min-height: 140px; padding-left: 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .milestone-line a:last-child { border-bottom: 0; }
  .page-hero { min-height: 410px; padding-bottom: 58px; }
  .page-hero h1 { font-size: 38px; }
  .page-hero p { font-size: 17px; }
  .split-facts,
  .target-metrics,
  .capacity-line,
  .advantage-list,
  .carbon-principles,
  .validation-metrics,
  .cooperation-list,
  .path-steps { grid-template-columns: 1fr; }
  .advantage-card,
  .advantage-card-inner { min-height: 250px; }
  .target-metrics div,
  .capacity-line div { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.18); }
  .target-metrics div:last-child,
  .capacity-line div:last-child { border-bottom: 0; }
  .product-image,
  .company-photo { min-height: 380px; }
  .product-points div { grid-template-columns: 1fr; gap: 4px; }
  .project-note { flex-direction: column; gap: 8px; }
  .contact-form { padding: 24px; }
  .footer { align-items: flex-start; flex-direction: column; }
  .footer-links { display: grid; gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}