:root {
  --ink: #0b1220;
  --paper: #f7f8fb;
  --white: #ffffff;
  --blue: #153fc7;
  --blue-dark: #0d2a91;
  --orange: #ff5f22;
  --line: #dce2ec;
  --muted: #667085;
  --max: 1240px;
  color-scheme: light;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
img { display: block; max-width: 100%; }
.section-shell { width: min(calc(100% - 56px), var(--max)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 100; padding: 10px 14px; background: var(--ink); color: white; transform: translateY(-160%); }
.skip-link:focus { transform: none; }

.site-header { position: sticky; top: 0; z-index: 50; height: 78px; padding: 0 max(28px, calc((100vw - var(--max)) / 2)); display: flex; align-items: center; justify-content: space-between; background: color-mix(in srgb, var(--paper) 92%, transparent); border-bottom: 1px solid transparent; backdrop-filter: blur(18px); transition: border-color .2s ease; }
.site-header.is-scrolled { border-color: var(--line); }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 46px; height: 42px; border: 1px solid var(--blue); display: grid; place-items: center; overflow: hidden; position: relative; }
.brand-cliff { width: 42px; height: 30px; display: block; }
.brand strong { display: block; font-size: 17px; letter-spacing: .04em; }
.brand small { display: block; margin-top: 2px; color: var(--muted); font-size: 10px; letter-spacing: .13em; }
.site-nav { display: flex; align-items: center; gap: 28px; font-size: 14px; }
.site-nav a { position: relative; color: #3c4659; }
.site-nav a:not(.nav-cta)::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -8px; height: 2px; background: var(--blue); transition: right .2s ease; }
.site-nav a:hover::after, .site-nav a.is-active::after { right: 0; }
.nav-cta { padding: 11px 18px; background: var(--ink); color: white !important; }
.menu-toggle { display: none; }

.eyebrow { margin: 0 0 20px; color: var(--blue); font: 700 11px/1.4 Arial, sans-serif; letter-spacing: .15em; }
.hero { min-height: calc(100vh - 78px); padding-block: clamp(70px, 9vw, 130px); display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: clamp(50px, 7vw, 100px); }
.hero h1 { margin: 0; max-width: 720px; font-size: clamp(54px, 6.9vw, 100px); line-height: .98; letter-spacing: -.07em; font-weight: 780; }
.hero-lead { max-width: 700px; margin: 34px 0 0; font-size: clamp(17px, 1.55vw, 22px); line-height: 1.75; color: #495467; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 38px; }
.button { min-height: 48px; padding: 0 22px; display: inline-flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 700; border: 1px solid var(--ink); }
.button.primary { background: var(--blue); border-color: var(--blue); color: white; }
.button.secondary { background: transparent; }
.button:hover { transform: translateY(-2px); transition: transform .18s ease; }
.hero-proof { display: grid; grid-template-columns: repeat(3, 1fr); margin: 64px 0 0; border-top: 1px solid var(--line); }
.hero-proof div { padding: 18px 12px 0 0; }
.hero-proof dt { color: var(--blue); font: 700 12px/1 Arial, sans-serif; }
.hero-proof dd { margin: 8px 0 0; font-size: 12px; color: var(--muted); }

.workflow-visual { min-height: 600px; position: relative; border: 1px solid var(--line); background: var(--white); overflow: hidden; }
.workflow-visual::before { content: ""; position: absolute; inset: 0; opacity: .38; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 46px 46px; }
.visual-label { position: absolute; top: 28px; left: 28px; right: 28px; display: flex; justify-content: space-between; font-size: 10px; letter-spacing: .12em; }
.visual-label span { color: var(--blue); font-weight: 700; }
.visual-label b { font-weight: 500; color: var(--muted); }
.workflow-stage { width: 270px; padding: 20px; position: absolute; z-index: 3; background: white; border: 1px solid var(--ink); }
.workflow-stage span { color: var(--blue); font: 700 10px/1 Arial, sans-serif; letter-spacing: .13em; }
.workflow-stage strong { display: block; margin-top: 11px; font-size: 18px; }
.workflow-stage small { display: block; margin-top: 6px; color: var(--muted); }
.stage-input { left: 34px; top: 112px; }
.stage-ai { right: 34px; top: 260px; background: var(--blue); color: white; border-color: var(--blue); }
.stage-ai span, .stage-ai small { color: #cbd8ff; }
.stage-output { left: 34px; bottom: 54px; }
.workflow-line { position: absolute; z-index: 1; border-style: solid; border-color: var(--blue); }
.line-one { left: 304px; top: 164px; width: 118px; height: 154px; border-width: 1px 1px 0 0; }
.line-two { right: 304px; top: 344px; width: 118px; height: 147px; border-width: 0 0 1px 1px; }
.workflow-node { width: 13px; height: 13px; border: 3px solid white; outline: 1px solid var(--blue); background: var(--orange); position: absolute; z-index: 4; }
.node-one { left: 414px; top: 310px; }.node-two { right: 414px; top: 483px; }
.signal { width: 8px; height: 8px; background: var(--blue); position: absolute; }
.signal-a { right: 44px; top: 108px; }.signal-b { left: 155px; top: 296px; }.signal-c { right: 105px; bottom: 72px; background: var(--orange); }

.problem-section { padding: 120px 0; background: var(--ink); color: white; }
.split-heading { display: grid; grid-template-columns: 1.1fr .9fr; gap: 80px; align-items: end; }
.split-heading h2 { margin: 0; font-size: clamp(38px, 4.4vw, 64px); line-height: 1.1; letter-spacing: -.045em; }
.split-heading > p { margin: 0; max-width: 520px; color: #9aa5b8; font-size: 16px; line-height: 1.8; }
.problem-section .eyebrow { color: #8eabff; }
.problem-list { list-style: none; padding: 72px 0 0; display: grid; grid-template-columns: repeat(5, 1fr); }
.problem-list li { min-height: 240px; padding: 24px 24px 20px 0; border-top: 1px solid #354055; border-right: 1px solid #354055; }
.problem-list li + li { padding-left: 24px; }
.problem-list li:last-child { border-right: 0; }
.problem-list span { color: var(--orange); font: 700 12px/1 Arial, sans-serif; }
.problem-list strong { display: block; margin-top: 76px; font-size: 20px; }
.problem-list p { color: #9aa5b8; font-size: 13px; line-height: 1.7; }

.capability-section { padding-block: 130px; }
.section-kicker { padding-bottom: 24px; display: flex; justify-content: space-between; border-bottom: 1px solid var(--line); font-size: 12px; }
.section-kicker span { color: var(--blue); font: 700 11px/1 Arial, sans-serif; letter-spacing: .14em; }
.section-kicker b { font-weight: 500; color: var(--muted); }
.capability { min-height: 310px; display: grid; grid-template-columns: 100px 1.15fr .85fr; gap: 36px; align-items: center; border-bottom: 1px solid var(--line); }
.capability.featured { background: var(--blue); color: white; margin-inline: -28px; padding-inline: 28px; border: 0; }
.capability-number { align-self: start; padding-top: 64px; color: var(--blue); font-size: 52px; font-weight: 700; letter-spacing: -.05em; }
.featured .capability-number, .featured .eyebrow { color: #cbd8ff; }
.capability h2 { margin: 0; font-size: clamp(30px, 3.2vw, 46px); letter-spacing: -.04em; }
.capability-copy > p:last-child { max-width: 540px; margin: 16px 0 0; color: var(--muted); line-height: 1.75; }
.featured .capability-copy > p:last-child { color: #dce4ff; }
.capability ul { margin: 0; padding: 0; list-style: none; }
.capability li { padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.featured li { border-color: #4a69d7; }

.process-section { padding: 120px 0; background: white; }
.process-section .split-heading > p { color: var(--muted); }
.process-list { margin: 80px 0 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); }
.process-list li { min-height: 250px; padding: 26px 28px 20px 0; border-top: 2px solid var(--ink); border-right: 1px solid var(--line); }
.process-list li + li { padding-left: 28px; }
.process-list li:last-child { border-right: 0; }
.process-list span { color: var(--blue); font: 700 13px/1 Arial, sans-serif; }
.process-list div { margin-top: 88px; }
.process-list strong { font-size: 22px; }
.process-list p { color: var(--muted); font-size: 13px; line-height: 1.7; }

.work-section { padding-block: 130px; }
.work-section .split-heading > p { color: var(--muted); }
.work-grid { margin-top: 70px; display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.work-card { min-height: 340px; padding: 32px; display: flex; flex-direction: column; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: white; color: inherit; transition: transform .18s ease, box-shadow .18s ease; }
.work-card:hover { transform: translateY(-4px); box-shadow: 0 18px 42px rgb(11 18 32 / 10%); }
.work-card:focus-visible { position: relative; z-index: 2; outline: 3px solid var(--orange); outline-offset: -3px; }
.work-card.dark { background: var(--ink); color: white; }.work-card.blue { background: var(--blue); color: white; }.work-card.warm { background: #f1eadf; }
.work-type { align-self: flex-start; padding: 6px 9px; border: 1px solid currentColor; font-size: 11px; }
.work-card small { margin-top: auto; color: var(--blue); font: 700 10px/1 Arial, sans-serif; letter-spacing: .13em; }
.work-card.dark small, .work-card.blue small { color: #a9bcff; }
.work-card h3 { margin: 16px 0 12px; font-size: clamp(24px, 2.6vw, 38px); line-height: 1.15; letter-spacing: -.03em; }
.work-card p { max-width: 560px; margin: 0; color: var(--muted); line-height: 1.75; font-size: 14px; }
.work-card.dark p, .work-card.blue p { color: #c8d0df; }
.work-card b { margin-top: 22px; font-size: 12px; font-weight: 600; }
.work-link { margin-top: 18px; color: var(--blue); font-size: 12px; font-weight: 700; }
.work-card.dark .work-link, .work-card.blue .work-link { color: #dce4ff; }

.about-section { padding: 120px 0; background: var(--blue); color: white; }
.about-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 100px; }
.about-section .eyebrow { color: #cbd8ff; }
.about-section h2 { margin: 0; font-size: clamp(40px, 5.2vw, 72px); line-height: 1.05; letter-spacing: -.055em; }
.about-copy { align-self: end; }
.about-copy p { margin: 0 0 22px; color: #dce4ff; font-size: 17px; line-height: 1.85; }

.contact-section { padding: 130px 0; background: white; }
.contact-grid { display: grid; grid-template-columns: 1fr 420px; gap: 100px; align-items: center; }
.contact-copy h2 { margin: 0; font-size: clamp(48px, 6vw, 82px); line-height: 1; letter-spacing: -.06em; }
.contact-copy > p:not(.eyebrow, .company-name) { max-width: 650px; margin: 30px 0 0; color: var(--muted); font-size: 16px; line-height: 1.8; }
.contact-copy ul { display: flex; flex-wrap: wrap; gap: 8px 26px; margin: 30px 0 0; padding: 0; list-style: none; font-size: 13px; }
.contact-copy li::before { content: "↗"; margin-right: 7px; color: var(--orange); }
.company-name { margin-top: 64px; font-weight: 700; line-height: 1.6; }.company-name span { color: var(--muted); font-weight: 400; font-size: 13px; }
.qr-card { margin: 0; padding: 20px; border: 1px solid var(--line); background: var(--paper); }
.qr-card img { width: 100%; aspect-ratio: 753 / 960; object-fit: contain; background: white; }
.qr-card figcaption { padding: 20px 4px 4px; display: flex; justify-content: space-between; align-items: end; }
.qr-card strong { font-size: 18px; }.qr-card span { color: var(--muted); font-size: 12px; }

.site-footer { padding: 24px 0; background: var(--ink); color: #9ba6b8; font-size: 12px; }
.site-footer .section-shell { display: flex; justify-content: space-between; }

@media (max-width: 920px) {
  .site-header { height: 68px; }
  .menu-toggle { width: 44px; height: 44px; padding: 12px; display: grid; align-content: center; gap: 5px; border: 0; background: transparent; }
  .menu-toggle span { height: 1px; background: var(--ink); }
  .site-nav { position: absolute; top: 68px; left: 0; right: 0; padding: 22px 28px 28px; display: none; align-items: stretch; flex-direction: column; gap: 0; background: var(--paper); border-bottom: 1px solid var(--line); }
  .site-nav.is-open { display: flex; }
  .site-nav a { min-height: 48px; display: flex; align-items: center; border-bottom: 1px solid var(--line); }
  .nav-cta { margin-top: 12px; justify-content: center; }
  .hero { grid-template-columns: 1fr; }
  .workflow-visual { min-height: 540px; }
  .split-heading, .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .problem-list { grid-template-columns: repeat(2, 1fr); }
  .problem-list li { border-bottom: 1px solid #354055; }
  .capability { grid-template-columns: 70px 1fr; padding-block: 42px; }
  .capability-number { padding-top: 0; }
  .capability ul { grid-column: 2; }
  .process-list { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { max-width: 720px; }
  .qr-card { max-width: 420px; }
}

@media (max-width: 620px) {
  .section-shell { width: min(calc(100% - 36px), var(--max)); }
  .brand small { display: none; }
  .hero { padding-block: 72px; }
  .hero h1 { font-size: clamp(48px, 14vw, 68px); }
  .hero-proof { grid-template-columns: 1fr; gap: 14px; }
  .workflow-visual { min-height: 560px; }
  .visual-label b { display: none; }
  .workflow-stage { left: 24px; right: 24px; width: auto; }
  .stage-input { top: 90px; }.stage-ai { top: 245px; }.stage-output { bottom: 40px; }
  .workflow-line { left: 50%; right: auto; width: 1px; height: 64px; border-width: 0 0 0 1px; }
  .line-one { top: 193px; }.line-two { top: 349px; }
  .workflow-node { left: calc(50% - 6px); right: auto; }.node-one { top: 227px; }.node-two { top: 383px; }
  .problem-section, .capability-section, .process-section, .work-section, .about-section, .contact-section { padding-block: 88px; }
  .problem-list { grid-template-columns: 1fr; }
  .problem-list li, .problem-list li + li { min-height: auto; padding: 24px 0; border-right: 0; }
  .problem-list strong { margin-top: 30px; }
  .capability, .capability.featured { margin-inline: 0; padding: 34px 0; grid-template-columns: 1fr; gap: 18px; background: transparent; color: var(--ink); border-bottom: 1px solid var(--line); }
  .featured .capability-number, .featured .eyebrow { color: var(--blue); }
  .featured .capability-copy > p:last-child { color: var(--muted); }
  .featured li { border-color: var(--line); }
  .capability ul { grid-column: 1; }
  .process-list { grid-template-columns: 1fr; }
  .process-list li, .process-list li + li { min-height: auto; padding: 26px 0; border-right: 0; }
  .process-list div { margin-top: 40px; }
  .work-grid { grid-template-columns: 1fr; }
  .work-card { min-height: 310px; }
  .contact-copy ul { display: block; }.contact-copy li { margin-top: 10px; }
  .qr-card figcaption { align-items: flex-start; flex-direction: column; gap: 6px; }
  .site-footer .section-shell { gap: 14px; align-items: flex-start; flex-direction: column; }
}

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