:root {
  --navy: #071b2d;
  --blue: #0b63ce;
  --blue-deep: #084a99;
  --cloud: #f7f9fc;
  --steel: #d5dce5;
  --teal: #18a999;
  --sans: "Noto Sans SC", "Source Han Sans SC", "IBM Plex Sans", "Microsoft YaHei", sans-serif;
  --page-width: min(calc(100% - 32px), 1280px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; color: var(--navy); background: var(--cloud); font-family: var(--sans); line-height: 1.6; }
a { color: inherit; text-decoration: none; }

.skip-link { position: fixed; z-index: 20; top: -4rem; left: 1rem; padding: .7rem 1rem; color: var(--cloud); background: var(--blue); }
.skip-link:focus { top: 1rem; }
a:focus-visible { outline: 3px solid var(--teal); outline-offset: 3px; }

.site-header { width: var(--page-width); margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px 14px; padding-top: 15px; border-bottom: 1px solid var(--steel); }
.brand { display: inline-flex; align-items: center; min-height: 42px; gap: .66rem; color: var(--navy); font-size: 16px; font-weight: 700; letter-spacing: -.04em; }
.brand-mark { display: block; width: 30px; height: 30px; flex: 0 0 auto; object-fit: contain; }
nav { grid-column: 1 / -1; display: flex; gap: 5px; overflow-x: auto; overscroll-behavior-inline: contain; padding: 0 0 11px; scrollbar-width: none; color: #35516b; font-size: 12px; white-space: nowrap; }
nav::-webkit-scrollbar { display: none; }
nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 .75rem; border: 1px solid transparent; }
nav a:active, nav a:hover { color: var(--blue); border-color: #c7ddec; }
.nav-action { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 0 .78rem; color: var(--blue); border: 1px solid #9fc4ec; font-size: 11px; font-weight: 700; white-space: nowrap; transition: color .18s ease, background .18s ease; }
.nav-action:active, .nav-action:hover { color: white; background: var(--blue); }

.hero, .section, .architecture-inner, footer { width: var(--page-width); margin: 0 auto; }
.hero { display: grid; gap: 32px; padding: 46px 0 56px; }
.hero-copy { min-width: 0; }
.eyebrow, .section-label { display: flex; align-items: center; gap: .7rem; margin: 0 0 18px; color: var(--blue); font-size: 9px; font-weight: 700; letter-spacing: .12em; }
.eyebrow::before { content: ""; width: 28px; height: 2px; background: var(--blue); }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { letter-spacing: -.07em; }
h1 { margin-bottom: 24px; font-size: clamp(3.1rem, 14vw, 4.65rem); font-weight: 800; line-height: 1.02; overflow-wrap: anywhere; }
h1 em, h2 em { color: var(--blue); font-style: normal; }
.hero-lede { margin-bottom: 26px; color: #3e5970; font-size: 15px; line-height: 1.85; }
.primary-link { display: flex; align-items: center; justify-content: center; width: 100%; min-height: 52px; padding: 0 20px; color: white; background: var(--blue); font-size: 13px; font-weight: 700; transition: background .18s ease, transform .18s ease; }
.primary-link:active, .primary-link:hover { background: var(--blue-deep); transform: translateY(-1px); }

.system-board { position: relative; min-height: 405px; padding: 16px; color: white; background: var(--navy); overflow: hidden; }
.system-board::before { content: ""; position: absolute; inset: 0; opacity: .38; background-image: linear-gradient(rgba(159, 196, 236, .16) 1px, transparent 1px), linear-gradient(90deg, rgba(159, 196, 236, .16) 1px, transparent 1px); background-size: 48px 48px; }
.board-head, .board-core, .board-layer { position: relative; z-index: 1; }
.board-head { display: flex; justify-content: space-between; color: #a7c5e4; font-size: 9px; font-weight: 700; letter-spacing: .09em; }
.board-core { display: flex; align-items: center; justify-content: space-between; min-height: 134px; padding: 20px 16px; margin: 19px 0 10px; border: 1px solid rgba(159, 196, 236, .55); background: rgba(7, 27, 45, .82); font-size: clamp(1.45rem, 7.5vw, 2.15rem); font-weight: 700; letter-spacing: -.06em; line-height: 1.08; }
.board-core i { width: 42px; height: 42px; flex: 0 0 auto; border: 2px solid var(--teal); transform: rotate(45deg); }
.board-layer { display: grid; grid-template-columns: 31px minmax(0, 1fr); gap: 3px 10px; align-items: baseline; padding: 11px 10px; margin-top: 6px; border-left: 3px solid var(--blue); background: rgba(247, 249, 252, .1); }
.board-layer span { color: #9fc4ec; font-size: 10px; font-weight: 700; }
.board-layer strong { font-size: 14px; letter-spacing: -.03em; }
.board-layer small { grid-column: 2; color: #a7c5e4; font-size: 9px; }
.layer-model { border-left-color: var(--teal); }
.layer-industry { border-left-color: #f3bc61; }

.signal-bar { display: flex; align-items: center; gap: 20px; overflow-x: auto; overscroll-behavior-inline: contain; padding: 15px 16px; color: white; background: var(--blue); font-size: 10px; font-weight: 700; letter-spacing: .08em; scrollbar-width: none; white-space: nowrap; }
.signal-bar::-webkit-scrollbar { display: none; }
.signal-bar i { flex: 0 0 6px; width: 6px; height: 6px; background: #92d7ff; transform: rotate(45deg); }

.section-label { color: #57718a; }
.section-label span { display: grid; width: 28px; height: 28px; place-items: center; color: white; background: var(--blue); font-size: 9px; }
.section-label p { margin: 0; font-size: 9px; font-weight: 700; letter-spacing: .1em; }
h2 { margin-bottom: 23px; font-size: clamp(2.45rem, 11.5vw, 4.2rem); font-weight: 800; line-height: 1.1; }
.intro { display: grid; gap: 28px; padding: 82px 0; }
.intro > div:last-child > p { margin: 0; color: #496176; font-size: 15px; line-height: 1.95; }

.capabilities { position: relative; padding: 74px 0 82px; }
.capabilities::before { content: ""; position: absolute; z-index: -1; top: 0; right: 0; width: 54%; height: 100%; background: #e9f2fb; }
.capability-heading { display: grid; gap: 22px; padding-bottom: 40px; }
.capability-heading h2 { margin: 0; }
.capability-list { border-top: 1px solid var(--steel); }
.capability-list article { display: grid; grid-template-columns: 35px minmax(0, 1fr); gap: 10px 14px; padding: 27px 0; border-bottom: 1px solid var(--steel); }
.capability-index { color: var(--blue); font-size: 12px; font-weight: 700; }
.capability-name p { margin-bottom: 4px; color: #5a748d; font-size: 9px; font-weight: 700; letter-spacing: .09em; }
h3 { margin: 0; font-size: 22px; font-weight: 800; line-height: 1.3; }
.capability-detail { grid-column: 2; margin: 0; color: #496176; font-size: 14px; line-height: 1.85; }

.architecture { color: white; background: var(--navy); }
.architecture-inner { display: grid; gap: 48px; padding: 78px 0; }
.inverse { color: #9fc4ec; }
.inverse span { color: var(--navy); background: #9fc4ec; }
.architecture h2 { margin-bottom: 22px; }
.architecture-copy > p:last-child { margin: 0; color: #b8ccdf; font-size: 14px; line-height: 1.9; }
.architecture-map { position: relative; padding-left: 21px; border-left: 1px solid #597694; }
.architecture-map::before { content: ""; position: absolute; top: 13px; left: -5px; width: 9px; height: 9px; background: var(--teal); transform: rotate(45deg); }
.architecture-map div { padding: 17px 0 17px 17px; border-bottom: 1px solid rgba(159, 196, 236, .34); }
.architecture-map span { display: block; margin-bottom: 5px; color: #8fb8dc; font-size: 9px; font-weight: 700; letter-spacing: .1em; }
.architecture-map strong { font-size: 15px; font-weight: 600; letter-spacing: -.04em; line-height: 1.55; }

.industry { display: grid; padding: 76px 0; }
.industry-panel { position: relative; z-index: 1; padding: 34px 24px 38px; color: white; background: var(--blue); }
.industry-panel::before { content: ""; position: absolute; inset: 0; opacity: .3; background-image: linear-gradient(90deg, transparent 49%, rgba(255, 255, 255, .7) 50%, transparent 51%), linear-gradient(transparent 49%, rgba(255, 255, 255, .7) 50%, transparent 51%); background-size: 42px 42px; }
.industry-panel > * { position: relative; }
.industry-kicker { display: flex; justify-content: space-between; margin-bottom: 44px; color: #b4dcff; font-size: 9px; font-weight: 700; letter-spacing: .09em; }
.industry-panel h2 { margin-bottom: 21px; }
.industry-panel p { margin-bottom: 0; color: #e8f3ff; font-size: 14px; line-height: 1.9; }
.industry-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 29px; }
.industry-tags span { padding: 6px 9px; border: 1px solid rgba(255, 255, 255, .44); color: white; font-size: 10px; }
.industry-grid { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; min-height: 278px; color: #5c748d; background: #e9f2fb; font-size: 9px; font-weight: 700; letter-spacing: .1em; }
.industry-grid div { position: relative; display: flex; align-items: end; padding: 17px; border-left: 1px solid #c7d8e9; border-bottom: 1px solid #c7d8e9; }
.industry-grid div::before { content: ""; position: absolute; inset: 19px; border: 1px solid #9fb9d2; }
.industry-grid span { position: relative; }
.grid-vehicle { grid-row: span 2; background: #f2f7fc; }
.grid-vehicle::after { content: ""; position: absolute; width: 76%; height: 42%; top: 29%; left: 12%; border: 2px solid var(--blue); border-radius: 49% 49% 18% 18%; transform: skewX(-18deg); }
.grid-engine::after { content: ""; position: absolute; width: 44%; aspect-ratio: 1; top: 24%; left: 29%; border: 2px solid var(--teal); transform: rotate(45deg); }
.grid-sim::after { content: ""; position: absolute; width: 55%; height: 40%; top: 27%; left: 24%; border: 2px solid #6c9ed1; }

.cooperate { display: grid; gap: 20px; padding: 28px 0 76px; }
.cooperate h2 { margin: 0; }
.cooperate-contact { display: grid; gap: 18px; min-width: 0; }
.cooperate-contact > p { margin: 0; color: #496176; font-size: 14px; line-height: 1.9; }
.qr-trigger { display: grid; grid-template-columns: 104px minmax(0, 1fr); align-items: center; gap: 16px; width: 100%; padding: 12px; border: 1px solid #b7cfe5; color: var(--navy); background: white; font: inherit; text-align: left; cursor: zoom-in; transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease; }
.qr-trigger:hover, .qr-trigger:focus-visible { border-color: var(--blue); box-shadow: 0 10px 22px rgba(18, 88, 160, .13); }
.qr-trigger:active { transform: translateY(1px); }
.qr-trigger img { display: block; width: 104px; height: 104px; background: white; object-fit: contain; }
.qr-trigger-copy { display: grid; gap: 5px; min-width: 0; }
.qr-trigger strong { font-size: 15px; letter-spacing: -.03em; }
.qr-trigger small { color: #587088; font-size: 12px; line-height: 1.55; }
.qr-dialog { position: fixed; inset: auto 0 0; width: 100%; max-width: none; max-height: min(94dvh, 760px); margin: 0; padding: 0; border: 0; border-top: 3px solid var(--blue); color: white; background: var(--navy); box-shadow: 0 -24px 70px rgba(4, 19, 34, .38); overflow: auto; }
.qr-dialog[open] { animation: signal-rise .34s cubic-bezier(.22, .8, .25, 1) both; }
.qr-dialog::before { content: ""; position: absolute; inset: 0; opacity: .34; background-image: linear-gradient(rgba(159, 196, 236, .18) 1px, transparent 1px), linear-gradient(90deg, rgba(159, 196, 236, .18) 1px, transparent 1px); background-size: 42px 42px; pointer-events: none; }
.qr-dialog::after { content: ""; position: absolute; top: 0; left: 14%; width: 2px; height: 100%; background: var(--blue); box-shadow: 176px 0 0 rgba(159, 196, 236, .2); pointer-events: none; }
.qr-dialog::backdrop { background: rgba(4, 18, 32, .72); backdrop-filter: blur(5px); }
.qr-dialog-close { position: absolute; z-index: 2; top: 18px; right: 16px; margin: 0; }
.qr-dialog-close button { min-height: 40px; padding: 0 12px; border: 1px solid rgba(159, 196, 236, .65); color: #d8e8f8; background: rgba(7, 27, 45, .64); font: inherit; font-size: 11px; font-weight: 700; letter-spacing: .08em; cursor: pointer; }
.qr-dialog-close button:hover { border-color: #67adff; color: white; background: rgba(11, 99, 206, .42); }
.qr-dialog-close button:focus-visible { outline: 2px solid #67adff; outline-offset: 3px; }
.qr-dialog-shell { position: relative; z-index: 1; display: grid; gap: 28px; min-height: 100%; padding: 28px 16px 32px; }
.qr-dialog-meta { display: flex; justify-content: space-between; gap: 24px; padding-right: 78px; color: #9fc4ec; font-size: 9px; font-weight: 700; letter-spacing: .1em; }
.qr-dialog-copy { display: grid; gap: 14px; max-width: 470px; }
.qr-dialog-copy > p { margin: 0; color: #bdd2e6; font-size: 13px; line-height: 1.85; }
.qr-dialog-copy > p:first-child { color: #9fc4ec; font-size: 10px; font-weight: 700; letter-spacing: .1em; }
.qr-dialog-copy h2 { margin: 0; font-size: clamp(2.1rem, 10vw, 3.45rem); line-height: 1.04; }
.qr-dialog-copy h2 em { color: #67adff; }
.qr-dialog-code { position: relative; width: min(100%, 440px); margin: 0 auto 0 0; padding: 13px; border: 1px solid rgba(159, 196, 236, .64); background: #f8fbff; box-shadow: 18px 18px 0 rgba(11, 99, 206, .44); }
.qr-dialog-code::before, .qr-dialog-code::after { content: ""; position: absolute; width: 24px; height: 24px; border-color: #67adff; border-style: solid; pointer-events: none; }
.qr-dialog-code::before { top: -1px; left: -1px; border-width: 3px 0 0 3px; }
.qr-dialog-code::after { right: -1px; bottom: -1px; border-width: 0 3px 3px 0; }
.qr-dialog-code img { display: block; width: 100%; height: auto; background: white; object-fit: contain; }
.qr-dialog-code figcaption { display: flex; justify-content: space-between; gap: 12px; padding-top: 11px; color: #31516d; font-size: 9px; font-weight: 700; letter-spacing: .08em; }
@keyframes signal-rise { from { opacity: 0; transform: translateY(44px); } to { opacity: 1; transform: translateY(0); } }

footer { display: grid; gap: 12px; padding: 25px 0 34px; border-top: 1px solid var(--steel); color: #64748b; font-size: 9px; letter-spacing: .05em; }
footer p { margin: 0; }
footer .brand { font-size: 14px; }
footer .brand-mark { width: 27px; height: 27px; }

@media (min-width: 600px) {
  :root { --page-width: min(calc(100% - 48px), 720px); }
  .hero { gap: 42px; padding: 64px 0 76px; }
  .primary-link { width: fit-content; min-width: 220px; }
  .system-board { max-width: 540px; min-height: 430px; }
  .intro, .capabilities { padding-top: 100px; padding-bottom: 100px; }
  .industry { padding: 96px 0; }
}

@media (min-width: 900px) {
  :root { --page-width: min(calc(100% - 80px), 1440px); }
  .site-header { min-height: 88px; display: flex; align-items: center; gap: 30px; padding: 0; }
  .brand { font-size: 17px; }
  .brand-mark { width: 32px; height: 32px; }
  nav { display: flex; flex: 1; justify-content: center; gap: clamp(1.25rem, 3vw, 3.5rem); overflow: visible; padding: 0; font-size: 13px; }
  nav a { min-height: 44px; padding: 0; }
  .nav-action { padding: 0 .95rem; font-size: 12px; }
  .hero { min-height: 690px; grid-template-columns: minmax(0, 1.05fr) minmax(410px, .74fr); gap: 8vw; align-items: center; padding: 84px 0 92px; }
  h1 { font-size: clamp(3.5rem, 6.6vw, 7.25rem); letter-spacing: -.065em; }
  .hero-lede { max-width: 590px; font-size: 16px; }
  .primary-link { width: auto; }
  .system-board { max-width: none; min-height: 465px; padding: 18px; }
  .board-core { min-height: 159px; padding: 24px 18px; margin: 22px 0 12px; font-size: clamp(1.5rem, 3vw, 2.4rem); }
  .board-core i { width: 52px; height: 52px; }
  .board-layer { grid-template-columns: 43px 1fr auto; gap: 10px; padding: 15px 12px; margin-top: 7px; }
  .board-layer strong { font-size: 15px; }
  .board-layer small { grid-column: auto; font-size: 10px; white-space: nowrap; }
  .signal-bar { gap: 26px; justify-content: center; overflow: hidden; padding: 17px max(40px, calc((100% - 1440px) / 2)); font-size: clamp(11px, 1.3vw, 15px); }
  .section, .architecture-inner { width: min(calc(100% - 80px), 1240px); }
  h2 { font-size: clamp(2.35rem, 4.7vw, 5.35rem); }
  .intro { grid-template-columns: .56fr 1.35fr; gap: 10vw; padding: 145px 0; }
  .intro > div:last-child > p { max-width: 650px; font-size: 16px; }
  .capabilities { padding: 128px 0; }
  .capabilities::before { width: 36%; }
  .capability-heading { grid-template-columns: .85fr 1.25fr; gap: 9vw; padding-bottom: 66px; }
  .capability-list article { grid-template-columns: .23fr .85fr 1.25fr; gap: 28px; padding: 33px 0; }
  .capability-detail { grid-column: auto; max-width: 480px; margin: 4px 0 0; }
  h3 { font-size: 27px; }
  .architecture-inner { min-height: 700px; grid-template-columns: .9fr 1.1fr; gap: 9vw; align-items: center; padding: 115px 0; }
  .architecture-copy > p:last-child { max-width: 520px; font-size: 15px; }
  .architecture-map { padding-left: 28px; }
  .architecture-map div { padding: 21px 0 21px 22px; }
  .architecture-map strong { font-size: clamp(1rem, 1.7vw, 1.4rem); }
  .industry { grid-template-columns: 1.05fr .95fr; align-items: stretch; padding: 130px 0; }
  .industry-panel { padding: clamp(38px, 6vw, 78px); }
  .industry-kicker { margin-bottom: 62px; font-size: 10px; }
  .industry-panel p { font-size: 15px; }
  .industry-tags { margin-top: 38px; }
  .industry-grid { min-height: 550px; font-size: 10px; }
  .industry-grid div { padding: 23px; }
  .industry-grid div::before { inset: 26px; }
  .cooperate { grid-template-columns: 1.2fr .8fr; align-items: end; gap: 7vw; padding: 55px 0 115px; }
  .cooperate-contact > p { font-size: 15px; }
  .qr-trigger { grid-template-columns: 112px minmax(0, 1fr); }
  .qr-trigger img { width: 112px; height: 112px; }
  .qr-dialog { inset: 0 0 0 auto; width: min(72vw, 940px); max-height: none; border-top: 0; border-left: 3px solid var(--blue); box-shadow: -24px 0 70px rgba(4, 19, 34, .38); }
  .qr-dialog[open] { animation-name: signal-slide; }
  .qr-dialog-close { top: 28px; right: 34px; }
  .qr-dialog-shell { grid-template-columns: minmax(260px, .88fr) minmax(310px, 1.12fr); grid-template-rows: auto 1fr; align-items: center; column-gap: clamp(34px, 5vw, 82px); min-height: 100dvh; padding: 42px clamp(38px, 6vw, 88px); }
  .qr-dialog-meta { grid-column: 1 / -1; padding-right: 96px; }
  .qr-dialog-copy { align-self: center; }
  .qr-dialog-copy h2 { font-size: clamp(2.7rem, 4.7vw, 5.2rem); }
  .qr-dialog-code { width: min(100%, 505px); margin: 22px 0 0; transform: translateY(28px); }
  footer { width: min(calc(100% - 80px), 1440px); min-height: 132px; grid-template-columns: auto 1fr auto; align-items: center; gap: 30px; padding: 0; font-size: 10px; }
  footer .brand { font-size: 15px; }
  footer .brand-mark { width: 28px; height: 28px; }
}

@keyframes signal-slide { from { opacity: 0; transform: translateX(64px); } to { opacity: 1; transform: translateX(0); } }

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