:root {
  color-scheme: light;
  --bg: #ffffff;
  --bg-soft: #f5f9fd;
  --bg-mint: #f0fbf6;
  --surface: rgba(255, 255, 255, 0.88);
  --text: #172033;
  --muted: #637084;
  --faint: #5f6d80;
  --line: rgba(31, 62, 98, 0.12);
  --line-strong: rgba(31, 62, 98, 0.2);
  --blue: #2f86ff;
  --blue-strong: #176fe4;
  --blue-soft: #eaf4ff;
  --mint: #35bf8c;
  --mint-strong: #189f70;
  --mint-soft: #e8f9f1;
  --sky: #bce7ff;
  --shadow: 0 4px 16px rgba(31, 62, 98, 0.05);
  --shadow-soft: none;
  --shell: min(1360px, calc(100vw - 96px));
  --header-height: 76px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body.nav-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
h1, h2, h3 { text-wrap: balance; }
p, li, figcaption, small { text-wrap: pretty; }
/* Short display copy benefits from even lines; long statement copy keeps a reading rhythm. */
.hero-lead, .section-heading > p:last-child, .assurance-heading > p:last-child,
.system-copy > p:last-of-type, .assurance-card > p:not(.assurance-label),
.collaboration-copy > p:not(.eyebrow), .ecology-copy > p:not(.eyebrow),
.about-brand p, .closing-inner > p:not(.eyebrow), .flow-note p,
.assurance-principle p, .assurance-principle small, .statement-free strong,
.statement-app-head > div > p:last-child, .statement-section li,
.not-found-card > p:not(.not-found-code) { text-wrap: balance; }
.title-line { display: block; }
.app-name-part { display: inline-block; }
.phrase { white-space: nowrap; }
.copy-line { display: block; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--blue-strong); outline-offset: 5px; }
section[id], main[id] { scroll-margin-top: calc(var(--header-height) + 24px); }
.media-clips { position: absolute; width: 0; height: 0; overflow: hidden; }
::selection { color: #0e3e70; background: #cbe7ff; }

.shell { width: var(--shell); margin-inline: auto; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  transform: translateY(-150%);
  padding: 10px 16px;
  border-radius: 12px;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
}
.skip-link:focus { transform: translateY(0); }

/* Navigation */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header-height);
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.nav-shell {
  width: var(--shell);
  height: 100%;
  margin-inline: auto;
  display: grid;
  grid-template-columns: 190px 1fr auto;
  align-items: center;
  gap: 28px;
}
.brand { display: inline-flex; align-items: center; width: 136px; }
.brand img { width: 136px; height: auto; }
.primary-nav { display: flex; justify-content: center; align-items: center; gap: clamp(20px, 2.5vw, 38px); }
.primary-nav a {
  position: relative;
  color: #4e5b6c;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: color .2s ease;
}
.primary-nav a:hover { color: var(--blue-strong); }
.nav-toggle { display: none; }

.button {
  min-height: 50px;
  padding: 0 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-weight: 720;
  letter-spacing: -.01em;
  transition: background-color .15s ease, border-color .15s ease;
}
.button-primary { color: #fff; background: var(--blue-strong); }
.button-primary:hover { background: #125dc2; }
.button-secondary { color: #2c3c51; border-color: var(--line-strong); background: #fff; }
.button-secondary:hover { border-color: rgba(47,134,255,.35); background: #fff; }
.button-compact { min-height: 42px; padding: 0 19px; font-size: 14px; }

/* Hero */
.hero {
  position: relative;
  min-height: min(940px, 100vh);
  padding: calc(var(--header-height) + 74px) 0 72px;
  overflow: hidden;
  background: var(--bg-soft);
}
.hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  align-items: center;
  gap: clamp(50px, 6vw, 96px);
}
.eyebrow {
  margin: 0 0 22px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: #54708f;
  font-size: 12px;
  font-weight: 760;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.eyebrow > span { flex: 0 0 28px; height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--blue), var(--mint)); }
.hero h1 {
  margin: 0;
  max-width: 9.8em;
  font-size: clamp(56px, 5vw, 74px);
  line-height: 1.08;
  letter-spacing: -.065em;
  font-weight: 780;
}
.hero-line { display: block; white-space: nowrap; }
.hero h1 em {
  display: block;
  font-style: normal;
  color: var(--blue-strong);
}
.hero h1 em span { display: block; }
.hero-lead { max-width: 620px; margin: 28px 0 0; color: var(--muted); font-size: clamp(18px, 1.4vw, 21px); line-height: 1.8; }
.hero-actions { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 12px; }
.hero-tags { margin-top: 38px; display: flex; flex-wrap: wrap; gap: 10px; }
.hero-tags span { padding: 7px 12px; border: 1px solid rgba(57, 119, 181, .12); border-radius: 999px; background: rgba(255,255,255,.64); color: #6c7d91; font-size: 12px; }
.hero-visual {
  position: relative;
  margin: 0;
  min-height: 650px;
  border-radius: 20px;
}
.hero-visual > img { width: 100%; height: 650px; object-fit: cover; object-position: 61% center; border-radius: inherit; }
.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255,255,255,.75);
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(52, 111, 169, .05);
  pointer-events: none;
}
.hero-visual figcaption {
  position: absolute;
  left: 24px;
  bottom: 24px;
  z-index: 2;
  min-width: 225px;
  padding: 15px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid rgba(255,255,255,.72);
  border-radius: 17px;
  background: #fff;
}
.hero-visual figcaption span:last-child { display: grid; line-height: 1.3; }
.hero-visual figcaption strong { font-size: 13px; }
.hero-visual figcaption small { margin-top: 5px; color: var(--muted); font-size: 11px; }
.live-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--mint); }

.signal-strip { position: relative; z-index: 2; border-block: 1px solid var(--line); background: rgba(249,252,255,.82); }
.signal-grid { min-height: 110px; display: grid; grid-template-columns: repeat(4, 1fr); align-items: center; }
.signal-grid > div { min-height: 54px; padding: 0 32px; display: grid; align-content: center; border-left: 1px solid var(--line); }
.signal-grid > div:first-child { border-left: 0; padding-left: 0; }
.signal-grid strong { font-size: 15px; }
.signal-grid span { margin-top: 4px; color: var(--faint); font-size: 12px; text-wrap: balance; }

/* Shared sections */
.section { padding: clamp(80px, 8vw, 112px) 0; }
.section-heading { max-width: 820px; margin-bottom: clamp(52px, 6vw, 80px); }
.section-heading h2 { margin: 0; font-size: clamp(40px, 4.4vw, 64px); line-height: 1.25; letter-spacing: -.035em; font-weight: 740; }
.section-heading > p:last-child { max-width: 700px; margin: 24px 0 0; color: var(--muted); font-size: clamp(17px, 1.3vw, 20px); }

/* Product system cards */
.systems { background: #fff; }
.system-stack { display: grid; gap: 24px; }
.system-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--bg-soft);
}
.system-copy { position: relative; z-index: 2; }
.system-code { margin: 0 0 26px; color: #4e6680; font-size: 14px; font-weight: 700; letter-spacing: .03em; }
.system-code b { color: var(--blue); font-size: 16px; }
.system-copy h3 { margin: 0; max-width: 12em; font-size: clamp(30px, 3vw, 44px); line-height: 1.3; letter-spacing: -.025em; }
.system-copy > p:last-of-type { max-width: 560px; margin: 22px 0 0; color: var(--muted); font-size: 17px; }
.system-erp {
  min-height: 600px;
  padding: clamp(42px, 5vw, 74px);
  display: grid;
  grid-template-columns: .75fr 1.25fr;
  align-items: center;
  gap: 46px;
  background: var(--bg-soft);
}
.ui-media { min-width: 0; margin: 0; }
/* Clip the original 679 × 528 collage to its three clean UI contours. */
.product-erp { width: 100%; height: auto; clip-path: url(#erp-screen-clip); }
.feature-list { margin: 30px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 9px; list-style: none; }
.feature-list li { padding: 8px 12px; border-radius: 999px; background: rgba(255,255,255,.76); color: #53667b; font-size: 12px; }
.system-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.system-pair .system-card { min-height: 690px; display: flex; flex-direction: column; }
.system-pair .system-copy { padding: clamp(38px, 4vw, 58px); }
.system-wms { background: #f3f8f6; }
.system-tms { background: var(--bg-soft); }
.photo-media { position: relative; flex: 1; min-height: 370px; margin: auto 18px 18px; overflow: hidden; border-radius: 23px; }
.photo-media img { width: 100%; height: 100%; object-fit: cover; }

/* Flow */
.flow { background: var(--bg-soft); }
.flow-heading { margin-inline: auto; text-align: center; }
.flow-heading .eyebrow { justify-content: center; }
.flow-heading > p:last-child { margin-inline: auto; }
.flow-track { position: relative; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); list-style: none; }
.flow-track::before { content: ""; position: absolute; left: 8%; right: 8%; top: 27px; height: 1px; background: linear-gradient(90deg, rgba(47,134,255,.24), rgba(53,191,140,.38)); }
.flow-track li { position: relative; display: grid; justify-items: center; text-align: center; }
.flow-track li > span { z-index: 1; width: 54px; height: 54px; display: grid; place-items: center; border: 1px solid rgba(56,135,217,.18); border-radius: 50%; color: var(--blue); background: rgba(255,255,255,.92); box-shadow: 0 9px 24px rgba(61,117,176,.1); font-size: 12px; font-weight: 760; }
.flow-track li div { margin-top: 18px; display: grid; gap: 5px; }
.flow-track strong { font-size: 15px; }
.flow-track small { color: var(--faint); font-size: 12px; }
.flow-panels { margin-top: 72px; display: grid; grid-template-columns: 1.55fr .45fr; gap: 22px; }
.flow-network { position: relative; min-height: 460px; margin: 0; overflow: hidden; border-radius: 30px; box-shadow: var(--shadow); }
.flow-network img { width: 100%; height: 100%; min-height: 460px; object-fit: cover; }
.flow-network figcaption { position: absolute; left: 28px; bottom: 28px; padding: 17px 20px; display: grid; border: 1px solid rgba(255,255,255,.2); border-radius: 16px; color: #fff; background: #172b40; }
.flow-network figcaption strong { font-size: 16px; }
.flow-network figcaption span { color: rgba(255,255,255,.7); font-size: 12px; }
.flow-note { padding: 34px; display: flex; flex-direction: column; justify-content: space-between; border: 1px solid rgba(53,191,140,.15); border-radius: 30px; background: rgba(255,255,255,.76); box-shadow: var(--shadow-soft); }
.note-icon { width: 52px; height: 52px; display: grid; place-items: center; border-radius: 16px; color: var(--mint-strong); background: var(--mint-soft); font-size: 24px; }
.flow-note strong { display: block; font-size: clamp(24px, 2.3vw, 34px); line-height: 1.3; letter-spacing: -.025em; text-wrap: balance; }
.flow-note p { margin: 18px 0 0; color: var(--muted); font-size: 15px; }

/* Compliance and safety */
.assurance {
  position: relative;
  overflow: hidden;
  background: #fff;
}
.assurance-shell { position: relative; z-index: 1; }
.assurance-heading { max-width: 900px; margin: 0 auto clamp(52px, 6vw, 78px); text-align: center; }
.assurance-heading .eyebrow { justify-content: center; }
.assurance-heading h2 { margin: 0; font-size: clamp(40px, 4.4vw, 64px); line-height: 1.25; letter-spacing: -.035em; }
.assurance-heading > p:last-child { max-width: 720px; margin: 24px auto 0; color: var(--muted); font-size: clamp(17px, 1.3vw, 20px); }
.assurance-grid { display: grid; grid-template-columns: 1.06fr .94fr; gap: 24px; }
.assurance-card {
  position: relative;
  min-height: 560px;
  padding: clamp(38px, 4.4vw, 62px);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 20px;
}
.assurance-tax { background: var(--bg-soft); }
.assurance-food { background: #f3f8f6; }
.assurance-label { position: relative; margin: 0 0 24px; color: var(--blue-strong); font-size: 13px; font-weight: 780; letter-spacing: .04em; }
.assurance-food .assurance-label { color: var(--mint-strong); }
.assurance-card h3 { position: relative; max-width: 12em; margin: 0; font-size: clamp(30px, 3vw, 44px); line-height: 1.3; letter-spacing: -.025em; }
.assurance-card > p:not(.assurance-label) { position: relative; max-width: 620px; margin: 22px 0 0; color: var(--muted); font-size: 17px; }
.assurance-card ul { position: relative; margin: 38px 0 0; padding: 0; display: grid; gap: 1px; list-style: none; }
.assurance-card li { padding: 16px 0; display: grid; grid-template-columns: minmax(150px, .7fr) 1.3fr; gap: 22px; border-bottom: 1px solid var(--line); }
.assurance-card li:last-child { border-bottom: 0; }
.assurance-card li strong { font-size: 14px; }
.assurance-card li span { color: var(--faint); font-size: 13px; text-wrap: balance; }
.assurance-principle {
  margin-top: 24px;
  padding: 28px clamp(28px, 4vw, 54px);
  display: grid;
  grid-template-columns: auto 1fr minmax(250px, .7fr);
  align-items: center;
  gap: 28px;
  border: 1px solid rgba(47, 134, 255, .12);
  border-radius: 24px;
  background: rgba(255,255,255,.82);
  box-shadow: var(--shadow-soft);
}
.assurance-principle strong { color: var(--blue-strong); font-size: 14px; white-space: nowrap; }
.assurance-principle p { margin: 0; font-size: clamp(17px, 1.5vw, 21px); font-weight: 680; line-height: 1.55; }
.assurance-principle small { color: var(--faint); font-size: 12px; line-height: 1.65; }

/* Collaboration */
.collaboration { background: #fff; }
.collaboration-layout { display: grid; gap: 40px; }
.collaboration-copy h2, .ecology-copy h2 { margin: 0; max-width: 9em; font-size: clamp(40px, 4.4vw, 64px); line-height: 1.25; letter-spacing: -.035em; }
.collaboration-copy h2 { max-width: none; }
.collaboration-copy > p:not(.eyebrow), .ecology-copy > p:not(.eyebrow) { max-width: 600px; margin: 26px 0 0; color: var(--muted); font-size: 18px; }
.role-grid { margin-top: 38px; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.role-grid > div { padding: 22px 20px; display: grid; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.role-grid b { font-size: 14px; }
.role-grid span { margin-top: 4px; color: var(--faint); font-size: 12px; }
.device-stage { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.device-stage figure { min-width: 0; margin: 0; padding: 20px; display: flex; flex-direction: column; overflow: hidden; border: 1px solid var(--line); border-radius: 16px; background: var(--bg-soft); }
.device-stage img { width: 100%; height: auto; margin-bottom: 18px; }
.device-stage figcaption { margin-top: auto; padding-top: 16px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 16px; border-top: 1px solid var(--line); font-size: 14px; font-weight: 650; }
.device-stage figcaption span { color: var(--muted); font-size: 12px; font-weight: 400; }

/* Ecology */
.ecology { background: #f3f8f6; }
.ecology-shell { display: grid; grid-template-columns: .85fr 1.15fr; align-items: center; gap: clamp(54px, 7vw, 110px); }
.ecology-points { margin-top: 44px; display: grid; gap: 8px; }
.ecology-points > div { padding: 18px 0; display: grid; grid-template-columns: 42px 1fr; gap: 15px; align-items: start; border-bottom: 1px solid var(--line); }
.eco-number { color: var(--mint-strong); font-size: 11px; font-weight: 800; letter-spacing: .08em; }
.ecology-points p { margin: 0; color: var(--muted); font-size: 14px; }
.ecology-points strong { display: block; margin-bottom: 3px; color: var(--text); font-size: 16px; }
.ecology-media { position: relative; min-height: 650px; margin: 0; overflow: hidden; border-radius: 34px; box-shadow: var(--shadow); }
.ecology-media img { width: 100%; height: 650px; object-fit: cover; object-position: 63% center; }
.ecology-media::after { content: ""; position: absolute; inset: 0; border: 1px solid rgba(255,255,255,.8); border-radius: inherit; }

/* About and footer */
.about { background: #fff; }
.about-layout { display: grid; grid-template-columns: .78fr 1.22fr; gap: clamp(70px, 9vw, 140px); align-items: start; }
.about-brand img { width: 210px; height: auto; }
.about-brand p { max-width: 490px; margin: 32px 0 0; color: var(--muted); font-size: 18px; }
.portal-list { border-top: 1px solid var(--line); }
.portal-row { min-height: 98px; padding: 20px 4px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--line); transition: color .15s ease; }
.portal-row:hover { color: var(--blue-strong); }
.portal-row span { display: grid; }
.portal-row b { font-size: 17px; }
.portal-row small { margin-top: 5px; color: var(--faint); font-size: 12px; }
.portal-row em { font-style: normal; color: var(--blue-strong); font-size: 13px; font-weight: 700; }

.closing { position: relative; padding: clamp(88px, 9vw, 128px) 0; background: var(--bg-soft); }
.closing-inner { position: relative; z-index: 1; text-align: center; }
.closing-inner .eyebrow { justify-content: center; }
.closing h2 { margin: 0; font-size: clamp(44px, 5.5vw, 76px); line-height: 1.25; letter-spacing: -.035em; }
.closing-inner > p:not(.eyebrow) { margin: 26px 0 0; color: var(--muted); font-size: 18px; }
.closing-actions { margin-top: 34px; display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; }

.site-footer { padding: 58px 0 28px; border-top: 1px solid var(--line); background: #fbfdff; }
.footer-main { display: flex; align-items: center; justify-content: space-between; gap: 34px; }
.footer-brand { width: 148px; }
.footer-brand img { width: 148px; height: auto; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 28px; color: #667589; font-size: 13px; }
.footer-links a:hover { color: var(--blue); }
.footer-meta { margin-top: 42px; padding-top: 22px; display: flex; justify-content: space-between; gap: 22px; border-top: 1px solid var(--line); color: var(--faint); font-size: 12px; }
.footer-meta p { margin: 0; }
.footer-meta a:hover { color: var(--blue); }

/* Statement */
.statement-page { min-height: 100vh; background: var(--bg-soft); }
.statement-header {
  position: relative;
  z-index: 2;
  width: min(1120px, calc(100% - 64px));
  min-height: 92px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.statement-back { color: #627186; font-size: 13px; font-weight: 650; }
.statement-back span { margin-left: 6px; color: var(--blue); }
.statement-main { position: relative; z-index: 1; width: min(1120px, calc(100% - 64px)); margin: 0 auto; padding: 34px 0 78px; }
.statement-card { overflow: hidden; border: 1px solid var(--line); border-radius: 20px; background: #fff; }
.statement-app-head { padding: clamp(44px, 7vw, 82px); display: grid; grid-template-columns: 112px 1fr; gap: 34px; align-items: center; background: var(--bg-soft); }
.statement-mark { width: 112px; height: 112px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.95); border-radius: 28px; background: #fff; box-shadow: var(--shadow-soft); }
.statement-mark img { width: 82px; height: auto; }
.statement-kicker, .statement-index { margin: 0 0 14px; color: var(--blue); font-size: 11px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.statement-app-head h1 { margin: 0; font-size: clamp(38px, 6vw, 66px); line-height: 1.15; letter-spacing: -.055em; }
.statement-app-head > div > p:last-child { margin: 15px 0 0; color: var(--muted); }
.statement-free { padding: 30px clamp(38px, 7vw, 82px); display: grid; grid-template-columns: auto 1fr; gap: 22px; align-items: center; border-block: 1px solid rgba(53,191,140,.14); background: var(--mint-soft); }
.statement-free span { padding: 9px 16px; border-radius: 999px; color: #fff; background: var(--mint-strong); font-size: 14px; font-weight: 800; letter-spacing: .04em; white-space: nowrap; }
.statement-free strong { font-size: clamp(17px, 2vw, 21px); line-height: 1.55; }
.statement-section { padding: clamp(48px, 7vw, 82px); }
.statement-section + .statement-section { border-top: 1px solid var(--line); }
.statement-section h2 { max-width: 18em; margin: 0; font-size: clamp(30px, 4.4vw, 50px); line-height: 1.2; letter-spacing: -.045em; }
.statement-section > p:not(.statement-index) { max-width: 790px; margin: 24px 0 0; color: var(--muted); font-size: 17px; }
.statement-section ul { margin: 34px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; list-style: none; }
.statement-section li { position: relative; min-height: 110px; padding: 24px 22px 22px; border: 1px solid var(--line); border-radius: 18px; background: #f9fcff; color: #506074; }
.statement-section li::before { content: ""; display: block; width: 8px; height: 8px; margin-bottom: 17px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 5px rgba(53,191,140,.12); }
.statement-charge { background: var(--bg-soft); }
.statement-charge strong { color: var(--mint-strong); }
.statement-footer { position: relative; z-index: 1; width: min(1120px, calc(100% - 64px)); margin: 0 auto; padding-bottom: 38px; display: flex; justify-content: space-between; gap: 18px; color: var(--faint); font-size: 12px; }
.statement-footer p { margin: 0; }
.statement-footer a:hover { color: var(--blue); }

/* 404 */
.not-found-page { min-height: 100vh; display: grid; place-items: center; padding: 24px; background: var(--bg-soft); }
.not-found-card { width: min(680px, 100%); padding: 58px; text-align: center; border: 1px solid var(--line); border-radius: 32px; background: rgba(255,255,255,.86); box-shadow: var(--shadow); }
.not-found-card > img { width: 160px; height: auto; margin: 0 auto 46px; }
.not-found-code { margin: 0; color: var(--blue-strong); font-size: clamp(84px, 18vw, 154px); font-weight: 820; line-height: .85; letter-spacing: -.08em; }
.not-found-card h1 { margin: 30px 0 0; font-size: clamp(28px, 5vw, 44px); }
.not-found-card > p:not(.not-found-code) { margin: 14px auto 30px; color: var(--muted); }

/* Wide introductions pair the title with its explanation instead of leaving an empty column. */
@media (min-width: 1101px) {
  .section-intro {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    column-gap: clamp(48px, 6vw, 88px);
    max-width: none;
  }
  .section-intro > .eyebrow { grid-column: 1 / -1; }
  .section-intro > h2 { grid-column: 1; }
  .section-intro > p:not(.eyebrow) {
    grid-column: 2;
    align-self: end;
    max-width: 26em;
    margin: 0;
    padding-left: 28px;
    border-left: 1px solid var(--line-strong);
    line-height: 1.9;
  }
  .section-intro > .role-grid { grid-column: 1 / -1; }
}

@media (max-width: 1100px) {
  :root { --shell: min(100% - 48px, 1040px); }
  .nav-shell { grid-template-columns: 160px 1fr auto; gap: 18px; }
  .primary-nav { gap: 18px; }
  .primary-nav a { font-size: 13px; }
  .hero { min-height: auto; }
  .hero-layout { grid-template-columns: 1fr; }
  .hero-copy { max-width: 760px; padding-top: 18px; }
  .hero-visual { min-height: 590px; }
  .hero-visual > img { height: 590px; }
  .system-erp { grid-template-columns: 1fr; }
  .system-erp .system-copy { max-width: 760px; }
  .flow-panels { grid-template-columns: 1fr; }
  .flow-note { min-height: 260px; }
  .collaboration-layout, .ecology-shell { grid-template-columns: 1fr; }
  .assurance-grid { grid-template-columns: 1fr; }
  .assurance-card { min-height: 0; }
  .assurance-principle { grid-template-columns: auto 1fr; }
  .assurance-principle small { grid-column: 2; }
  .collaboration-copy, .ecology-copy { max-width: 760px; }
  .about-layout { grid-template-columns: .7fr 1.3fr; gap: 56px; }
}

@media (max-width: 820px) {
  :root { --shell: calc(100% - 36px); --header-height: 68px; }
  .nav-shell { grid-template-columns: 1fr auto auto; }
  .brand, .brand img { width: 120px; }
  .nav-entry { display: none; }
  .nav-toggle {
    width: 42px;
    height: 42px;
    padding: 11px;
    display: grid;
    align-content: center;
    gap: 5px;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: #fff;
  }
  .nav-toggle span:not(.sr-only) { width: 100%; height: 1.5px; border-radius: 2px; background: var(--text); transition: transform .2s ease, opacity .2s ease; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
  .primary-nav {
    position: fixed;
    inset: var(--header-height) 0 auto;
    max-height: 0;
    padding: 0 20px;
    display: grid;
    justify-content: stretch;
    gap: 0;
    overflow: hidden;
    border-bottom: 1px solid transparent;
    background: #fff;
    visibility: hidden;
    opacity: 0;
  }
  .primary-nav.is-open { max-height: calc(100dvh - var(--header-height)); overflow-y: auto; padding-block: 15px 22px; border-color: var(--line); opacity: 1; visibility: visible; }
  .primary-nav a { padding: 15px 4px; border-bottom: 1px solid var(--line); font-size: 16px; }
  .primary-nav a:last-child { border-bottom: 0; }
  .hero { padding-top: calc(var(--header-height) + 62px); }
  .hero h1 { font-size: clamp(49px, 11vw, 72px); }
  .hero-visual, .hero-visual > img { min-height: 500px; height: 500px; }
  .role-grid { grid-template-columns: 1fr 1fr; }
  .device-stage { grid-template-columns: 1fr; }
  .signal-grid { grid-template-columns: 1fr 1fr; padding-block: 22px; }
  .signal-grid > div { padding: 16px 24px; border-left: 0; }
  .signal-grid > div:nth-child(even) { border-left: 1px solid var(--line); }
  .system-pair { grid-template-columns: 1fr; }
  .flow-track { grid-template-columns: 1fr; gap: 0; }
  .flow-track::before { left: 26px; right: auto; top: 26px; bottom: 26px; width: 1px; height: auto; }
  .flow-track li { min-height: 94px; grid-template-columns: 54px 1fr; justify-items: start; align-items: start; text-align: left; gap: 20px; }
  .flow-track li div { margin-top: 3px; }
  .about-layout { grid-template-columns: 1fr; }
  .footer-main { align-items: flex-start; flex-direction: column; }
  .footer-links { justify-content: flex-start; }
  .statement-section ul { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  :root { --shell: calc(100% - 28px); }
  .section { padding: 88px 0; }
  .section-heading { margin-bottom: 44px; }
  .section-heading h2, .assurance-heading h2, .collaboration-copy h2, .ecology-copy h2 { font-size: clamp(30px, 8vw, 40px); }
  .flow-heading h2 .title-line { display: inline; }
  .hero { padding-bottom: 48px; }
  .hero h1 { font-size: clamp(36px, 10vw, 48px); }
  .hero-lead { font-size: 17px; }
  .hero-actions { display: grid; grid-template-columns: 1fr; }
  .hero-actions .button { width: 100%; }
  .hero-tags { margin-top: 25px; }
  .hero-visual { margin-inline: -4px; border-radius: 24px; }
  .hero-visual, .hero-visual > img { min-height: 430px; height: 430px; }
  .hero-visual > img { object-position: 68% center; }
  .hero-visual figcaption { left: 14px; right: 14px; bottom: 14px; min-width: 0; }
  .signal-grid { grid-template-columns: 1fr; }
  .signal-grid > div, .signal-grid > div:nth-child(even) { padding: 15px 2px; border-left: 0; border-bottom: 1px solid var(--line); }
  .signal-grid > div:last-child { border-bottom: 0; }
  .system-card { border-radius: 24px; }
  .system-erp { min-height: 0; padding: 34px 24px; gap: 36px; }
  .system-copy h3 { font-size: clamp(26px, 7.4vw, 34px); }
  .system-copy > p:last-of-type { font-size: 16px; }
  .system-pair .system-card { min-height: 580px; }
  .system-pair .system-copy { padding: 34px 24px; }
  .photo-media { min-height: 300px; margin: auto 12px 12px; border-radius: 18px; }
  .flow-network, .flow-network img { min-height: 380px; }
  .flow-network figcaption { left: 16px; right: 16px; bottom: 16px; }
  .flow-note { min-height: 240px; padding: 26px; }
  .assurance-card { padding: 34px 24px; border-radius: 24px; }
  .assurance-card h3 { font-size: clamp(26px, 7.4vw, 34px); }
  .assurance-card > p:not(.assurance-label) { font-size: 16px; }
  .assurance-card li { grid-template-columns: 1fr; gap: 4px; }
  .assurance-principle { padding: 26px 24px; grid-template-columns: 1fr; gap: 10px; border-radius: 20px; }
  .assurance-principle small { grid-column: auto; margin-top: 7px; }
  .role-grid { grid-template-columns: 1fr; }
  .device-stage figure { padding: 14px; }
  .ecology-media, .ecology-media img { min-height: 460px; height: 460px; }
  .ecology-media img { object-position: 67% center; }
  .portal-row { align-items: flex-start; }
  .portal-row em { padding-top: 3px; white-space: nowrap; }
  .closing h2 { font-size: clamp(28px, 7.5vw, 40px); }
  .closing-actions { display: grid; }
  .footer-meta { flex-direction: column; }
  .statement-header, .statement-main, .statement-footer { width: calc(100% - 28px); }
  .statement-header { min-height: 72px; }
  .statement-header .brand, .statement-header .brand img { width: 120px; }
  .statement-back { font-size: 0; }
  .statement-back::before { content: "返回首页"; font-size: 13px; }
  .statement-main { padding: 20px 0 56px; }
  .statement-card { border-radius: 23px; }
  .statement-app-head { grid-template-columns: 1fr; gap: 25px; padding: 38px 25px; }
  .statement-mark { width: 88px; height: 88px; border-radius: 22px; }
  .statement-mark img { width: 66px; }
  .statement-app-head h1 { font-size: clamp(30px, 8vw, 40px); }
  .statement-free { grid-template-columns: 1fr; align-items: start; padding: 26px 25px; }
  .statement-free span { justify-self: start; }
  .statement-section { padding: 44px 25px; }
  .statement-section > p:not(.statement-index) { font-size: 16px; }
  .statement-footer { flex-direction: column; }
  .not-found-card { padding: 42px 24px; }
}

/* Feedback only: no looping motion, delayed content, or animation dependency. */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
  .button { transition: background-color .18s ease, border-color .18s ease, transform .18s ease; }
  .portal-row em { transition: transform .2s ease; }
  .button:active { transform: translateY(0); }
}

@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .button:hover { transform: translateY(-2px); }
  .button:active { transform: translateY(0); }
  .portal-row:hover em { transform: translateX(3px); }
  .primary-nav a::after {
    content: "";
    position: absolute;
    inset: auto 0 -8px;
    height: 2px;
    background: linear-gradient(90deg, var(--blue), var(--mint));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .2s ease;
  }
  .primary-nav a:hover::after, .primary-nav a:focus-visible::after { transform: scaleX(1); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}