:root {
  --void: #070b12;
  --deep: #0a101a;
  --surface: #0e1622;
  --surface-2: #111d2c;
  --ice: #eef4ff;
  --muted: #9baabd;
  --dim: #718096;
  --cobalt: #245cff;
  --cobalt-bright: #5f87ff;
  --cobalt-soft: rgba(36, 92, 255, .14);
  --line: rgba(205, 221, 255, .10);
  --line-strong: rgba(205, 221, 255, .20);
  --danger: #ff8591;
  --radius: 3px;
  --shell: min(1380px, calc(100vw - 96px));
  --section: clamp(108px, 12vw, 180px);
  --ease: cubic-bezier(.16, 1, .3, 1);
  --font-sans: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  --font-mono: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { overflow-x: clip; scroll-behavior: smooth; background: var(--void); }
body { margin: 0; overflow-x: hidden; color: var(--ice); background: var(--void); font-family: var(--font-sans); font-weight: 300; -webkit-font-smoothing: antialiased; }
body::after { content: ""; position: fixed; inset: 0; z-index: -2; pointer-events: none; background: radial-gradient(circle at 76% 18%, rgba(36,92,255,.10), transparent 27%), linear-gradient(180deg, var(--void), #090e17 64%, var(--void)); }
button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
::selection { color: var(--ice); background: rgba(36,92,255,.65); }

.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: 200; padding: 12px 18px; color: var(--ice); background: var(--cobalt); transform: translateY(-160%); transition: transform .2s ease; }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 2px solid var(--cobalt-bright); outline-offset: 4px; }

.flow-engine { position: fixed; inset: 0; z-index: 0; width: 100%; height: 100%; pointer-events: none; opacity: .62; }
.grain { position: fixed; inset: 0; z-index: 90; pointer-events: none; opacity: .028; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.76' numOctaves='4'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.9'/%3E%3C/svg%3E"); }
main, .site-footer { position: relative; z-index: 2; }
.section-shell { width: var(--shell); margin-inline: auto; }
.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(34px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.js .reveal.is-visible { opacity: 1; transform: none; }

.site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; min-height: 74px; padding: 0 34px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 30px; border-bottom: 1px solid transparent; transition: background .35s ease, border-color .35s ease, min-height .35s var(--ease); }
.site-header.is-scrolled { min-height: 66px; border-color: var(--line); background: rgba(7,11,18,.88); backdrop-filter: blur(16px); }
.brand-lockup { display: flex; align-items: center; gap: 13px; min-height: 44px; }
.brand-lockup img { width: 62px; height: auto; }
.brand-lockup strong, .brand-lockup small { display: block; }
.brand-lockup strong { font-size: 14px; letter-spacing: .04em; }
.brand-lockup small { margin-top: 4px; color: var(--dim); font: 7px/1 var(--font-mono); letter-spacing: .12em; }
.site-nav { justify-self: center; display: flex; align-items: center; gap: clamp(18px, 2.4vw, 38px); }
.site-nav a { position: relative; min-height: 44px; display: inline-flex; align-items: center; color: var(--muted); font-size: 12px; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 7px; height: 1px; background: var(--cobalt-bright); transition: right .35s var(--ease); }
.site-nav a:hover { color: var(--ice); }
.site-nav a:hover::after, .site-nav a.is-active::after { right: 0; }
.menu-toggle { display: none; width: 48px; height: 48px; padding: 0; border: 0; background: transparent; cursor: pointer; }
.menu-toggle > span:not(.sr-only) { width: 22px; height: 1px; display: block; margin: 6px auto; background: var(--ice); transition: transform .3s var(--ease); }

.button { min-height: 52px; padding: 0 24px; display: inline-flex; align-items: center; justify-content: center; color: var(--ice); border: 1px solid rgba(107,143,255,.8); border-radius: var(--radius); background: var(--cobalt); font-size: 13px; font-weight: 700; letter-spacing: .02em; cursor: pointer; box-shadow: 0 16px 50px rgba(4,25,87,.28); transition: background .3s ease, border-color .3s ease, transform .45s var(--ease); }
.button:hover { background: #1748dc; border-color: var(--cobalt-bright); }
.button-small { min-height: 42px; padding-inline: 18px; font-size: 11px; }
.text-link { min-height: 44px; display: inline-flex; align-items: center; gap: 14px; color: var(--ice); font-size: 13px; }
.text-link span { color: var(--cobalt-bright); transition: transform .35s var(--ease); }
.text-link:hover span { transform: translate(3px, -3px); }

.hero { min-height: 100dvh; position: relative; overflow: hidden; display: flex; align-items: center; border-bottom: 1px solid var(--line); }
.hero-grid { position: absolute; inset: 0; z-index: 0; opacity: .42; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: clamp(68px,8vw,124px) clamp(68px,8vw,124px); mask-image: linear-gradient(90deg, rgba(0,0,0,.7), transparent 80%); }
.hero-vignette { position: absolute; inset: 0; z-index: 1; pointer-events: none; background: radial-gradient(ellipse 75% 68% at 72% 48%, transparent 28%, rgba(7,11,18,.68) 83%), linear-gradient(90deg, rgba(7,11,18,.92) 0%, rgba(7,11,18,.22) 62%, rgba(7,11,18,.82) 100%); }
.hero-inner { position: relative; z-index: 5; padding-top: 112px; padding-bottom: 86px; display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px; align-items: center; }
.hero-copy { grid-column: 1 / span 7; position: relative; z-index: 5; }
.eyebrow { margin: 0 0 25px; color: var(--cobalt-bright); font: 10px/1.2 var(--font-mono); letter-spacing: .19em; }
.hero h1 { max-width: 10ch; margin: 0; font-size: clamp(58px, 8.2vw, 132px); line-height: .89; letter-spacing: -.052em; font-weight: 800; text-wrap: balance; }
.hero-intro { max-width: 640px; margin: 30px 0 0; color: var(--muted); font-size: clamp(16px,1.35vw,20px); line-height: 1.75; text-wrap: pretty; }
.hero-actions { margin-top: 36px; display: flex; align-items: center; gap: 26px; }
.hero-principles { margin: 44px 0 0; padding: 20px 0 0; display: flex; flex-wrap: wrap; gap: 12px 28px; border-top: 1px solid var(--line); list-style: none; }
.hero-principles li { position: relative; padding-left: 14px; color: var(--dim); font-size: 11px; }
.hero-principles li::before { content: ""; position: absolute; left: 0; top: .5em; width: 4px; height: 4px; background: var(--cobalt-bright); }
.hero-visual { grid-column: 8 / -1; min-height: min(67vh,680px); position: relative; display: grid; place-items: center; }
.hero-orbit { position: absolute; width: min(43vw,580px); aspect-ratio: 1; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; }
.hero-orbit::before, .hero-orbit::after, .hero-orbit i { content: ""; position: absolute; border: 1px solid var(--line); border-radius: 50%; }
.hero-orbit::before { inset: 13%; }
.hero-orbit::after { inset: 29%; border-color: rgba(95,135,255,.26); }
.hero-orbit i:nth-child(1) { inset: -1px; border-top-color: var(--cobalt-bright); animation: spin 15s linear infinite; }
.hero-orbit i:nth-child(2) { inset: 13%; border-right-color: rgba(95,135,255,.8); animation: spin-reverse 11s linear infinite; }
.hero-orbit i:nth-child(3) { inset: 29%; border-bottom-color: rgba(95,135,255,.65); animation: spin 8s linear infinite; }
.hero-core { width: 82px; aspect-ratio: 1; display: grid; place-items: center; color: var(--ice); border: 1px solid rgba(95,135,255,.55); background: rgba(8,17,34,.88); font: 700 17px/1 var(--font-mono); box-shadow: 0 0 80px rgba(36,92,255,.24); }
.signal { position: absolute; width: 7px; height: 7px; background: var(--cobalt-bright); box-shadow: 0 0 18px rgba(95,135,255,.75); }
.signal-a { top: 12%; left: 49%; }.signal-b { right: 9%; top: 61%; }.signal-c { bottom: 18%; left: 19%; }
.hero-placeholder { width: min(84%,430px); min-height: 244px; position: relative; z-index: 2; background: rgba(7,11,18,.68); }
.hero-telemetry { position: absolute; left: 4%; right: 4%; bottom: 0; display: flex; align-items: center; gap: 10px; color: var(--dim); font: 8px/1 var(--font-mono); letter-spacing: .08em; }
.hero-telemetry i { flex: 1; height: 1px; background: linear-gradient(90deg,var(--line),var(--cobalt-bright),var(--line)); }
.scroll-cue { position: absolute; z-index: 6; left: 34px; bottom: 28px; display: flex; align-items: center; gap: 10px; color: var(--dim); font: 8px/1 var(--font-mono); letter-spacing: .12em; writing-mode: vertical-rl; }
.scroll-cue span { width: 1px; height: 34px; background: var(--cobalt-bright); animation: scroll-pulse 1.8s ease-in-out infinite; }

.media-placeholder { position: relative; overflow: hidden; min-height: 300px; padding: clamp(24px,3vw,42px); display: flex; flex-direction: column; justify-content: flex-end; border: 1px dashed rgba(95,135,255,.46); border-radius: var(--radius); background-color: rgba(11,18,29,.72); background-image: linear-gradient(rgba(205,221,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(205,221,255,.04) 1px, transparent 1px); background-size: 34px 34px; }
.media-placeholder::before, .media-placeholder::after { content: ""; position: absolute; width: 28px; height: 28px; border-color: var(--cobalt-bright); border-style: solid; opacity: .75; }
.media-placeholder::before { top: 14px; left: 14px; border-width: 1px 0 0 1px; }.media-placeholder::after { right: 14px; bottom: 14px; border-width: 0 1px 1px 0; }
.media-placeholder > span { position: absolute; top: 21px; right: 22px; color: var(--cobalt-bright); font: 8px/1 var(--font-mono); letter-spacing: .13em; }
.media-placeholder strong { max-width: 20ch; font-size: clamp(21px,2.1vw,31px); letter-spacing: -.025em; }
.media-placeholder p { max-width: 54ch; margin: 13px 0 0; color: var(--muted); font-size: 12px; line-height: 1.75; }

.manifesto { position: relative; z-index: 4; overflow: hidden; border-bottom: 1px solid var(--line); background: rgba(9,15,24,.92); }
.manifesto-track { width: max-content; min-height: 78px; padding-inline: 18px; display: flex; align-items: center; gap: 34px; color: var(--muted); font-size: 14px; letter-spacing: .12em; animation: marquee 28s linear infinite; }
.manifesto-track i { width: 5px; height: 5px; background: var(--cobalt-bright); transform: rotate(45deg); }

.section-heading { max-width: 960px; }
.section-heading h2, .capability-copy h2, .path-lead h2, .delivery-copy h2, .cases-head h2, .about-copy h2, .insights-head h2, .booking-copy h2 { margin: 0; font-size: clamp(42px,5.25vw,78px); line-height: .96; letter-spacing: -.048em; font-weight: 760; text-wrap: balance; }
.section-heading > p, .capability-copy > p, .path-lead > p, .delivery-copy > p, .cases-head p, .about-copy > p, .insights-head p, .booking-copy > p { max-width: 660px; margin: 25px 0 0; color: var(--muted); font-size: 16px; line-height: 1.78; text-wrap: pretty; }

.problems-section { padding-block: var(--section); }
.problem-layout { margin-top: 74px; display: grid; grid-template-columns: .35fr 1.65fr; gap: clamp(40px,8vw,120px); }
.problem-index { min-height: 180px; display: flex; flex-direction: column; justify-content: space-between; border-top: 1px solid var(--line-strong); }
.problem-index strong { padding-top: 16px; color: var(--cobalt-bright); font: 300 clamp(68px,8vw,130px)/1 var(--font-mono); letter-spacing: -.08em; }
.problem-index span { color: var(--dim); font-size: 11px; }
.problem-accordion { border-top: 1px solid var(--line-strong); }
.accordion-item { border-bottom: 1px solid var(--line); }
.accordion-item button { width: 100%; min-height: 86px; padding: 20px 0; display: grid; grid-template-columns: 48px 1fr 40px; align-items: center; gap: 16px; text-align: left; border: 0; background: transparent; cursor: pointer; }
.accordion-item button span { color: var(--dim); font: 11px/1 var(--font-mono); }
.accordion-item button strong { font-size: clamp(18px,2.1vw,28px); font-weight: 600; letter-spacing: -.025em; }
.accordion-item button i { justify-self: end; color: var(--cobalt-bright); font: 300 26px/1 var(--font-sans); transition: transform .35s var(--ease); }
.accordion-item.is-open button i { transform: rotate(45deg); }
.accordion-content { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .45s var(--ease); }
.accordion-content p { min-height: 0; overflow: hidden; margin: 0 56px 0 64px; color: var(--muted); line-height: 1.78; transition: margin .45s var(--ease); }
.accordion-item.is-open .accordion-content { grid-template-rows: 1fr; }
.accordion-item.is-open .accordion-content p { margin-bottom: 28px; }

.business-value-section { padding-block: clamp(84px,9vw,138px); border-block: 1px solid var(--line); }
.business-value-inner { display: grid; grid-template-columns: minmax(0,1.05fr) minmax(320px,.95fr); gap: clamp(48px,8vw,132px); align-items: end; }
.business-value-inner h2 { max-width: 13ch; font-size: clamp(48px,6.6vw,104px); line-height: .94; letter-spacing: -.06em; text-wrap: balance; }
.business-value-inner p { max-width: 44ch; margin: 0; color: var(--muted); font-size: clamp(15px,1.35vw,19px); line-height: 1.85; text-wrap: pretty; }
.business-value-inner p + p { margin-top: 22px; color: var(--ice); }
.solutions-section { padding-block: var(--section); border-block: 1px solid var(--line); background: rgba(10,16,26,.93); }
.solution-bento { margin-top: 70px; display: grid; grid-template-columns: repeat(12,1fr); grid-auto-rows: minmax(170px,auto); gap: 12px; }
.solution-card { position: relative; padding: clamp(24px,3vw,40px); display: flex; flex-direction: column; align-items: flex-start; text-align: left; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(14,22,34,.72); cursor: pointer; transition: transform .5s var(--ease), border-color .4s ease, background .4s ease; }
.solution-card:hover { transform: translateY(-5px); border-color: var(--line-strong); }
.solution-card.is-active { border-color: rgba(95,135,255,.72); background: rgba(36,92,255,.12); }
.solution-card::after { content: "↗"; position: absolute; top: 24px; right: 24px; color: var(--cobalt-bright); opacity: 0; transform: translate(-4px,4px); transition: opacity .3s ease, transform .3s var(--ease); }
.solution-card:hover::after, .solution-card.is-active::after { opacity: 1; transform: none; }
.solution-card-primary, .solution-card:not(.solution-card-primary):not(.solution-card-wide), .solution-card-wide { grid-column: span 3; min-height: 238px; }
.solution-code { color: var(--cobalt-bright); font: 10px/1 var(--font-mono); }
.solution-card strong { max-width: 12ch; margin-top: auto; font-size: clamp(24px,2.5vw,38px); line-height: 1.08; letter-spacing: -.04em; }
.solution-card p { max-width: 43ch; margin: 18px 0 0; color: var(--muted); font-size: 16px; line-height: 1.72; }
.solution-card em { margin-top: 20px; color: var(--dim); font-size: 10px; font-style: normal; }
.solution-preview { grid-column: 7 / -1; grid-row: 1 / span 2; min-height: 488px; position: relative; border: 1px solid var(--line); background: rgba(7,11,18,.55); }
.solution-preview-head { min-height: 58px; padding: 0 22px; display: flex; align-items: center; gap: 15px; color: var(--dim); border-bottom: 1px solid var(--line); font: 9px/1 var(--font-mono); letter-spacing: .08em; }
.solution-preview-head i { flex: 1; height: 1px; background: var(--line); }
.solution-placeholder { min-height: 371px; border: 0; }

.capabilities-section { padding-block: var(--section); display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(60px,8vw,130px); align-items: center; }
.capability-copy > p { max-width: 560px; }
.capability-detail { max-width: 560px; margin-top: 58px; padding: 28px 0 0; border-top: 1px solid var(--line-strong); }
.capability-detail span { color: var(--cobalt-bright); font: 9px/1 var(--font-mono); letter-spacing: .12em; }
.capability-detail h3 { margin: 16px 0 12px; font-size: clamp(25px,2.7vw,40px); letter-spacing: -.035em; }
.capability-detail p { margin: 0; color: var(--muted); line-height: 1.8; }
.capability-detail.is-changing { animation: detail-in .45s var(--ease); }
.capability-orbit { width: min(48vw,680px); aspect-ratio: 1; position: relative; justify-self: end; display: grid; place-items: center; }
.orbit-lines, .orbit-lines i { position: absolute; border: 1px solid var(--line); border-radius: 50%; }
.orbit-lines { inset: 12%; }.orbit-lines i:nth-child(1) { inset: 12%; }.orbit-lines i:nth-child(2) { inset: 27%; border-color: rgba(95,135,255,.28); }.orbit-lines i:nth-child(3) { inset: 42%; border-color: rgba(95,135,255,.52); }
.orbit-lines::before, .orbit-lines::after { content: ""; position: absolute; inset: 50% 0 auto; height: 1px; background: var(--line); }.orbit-lines::after { transform: rotate(60deg); }
.orbit-core { width: 132px; aspect-ratio: 1; position: relative; z-index: 2; display: grid; place-items: center; border: 1px solid rgba(95,135,255,.48); background: var(--deep); box-shadow: 0 0 90px rgba(36,92,255,.21); }
.orbit-core img { width: 58px; opacity: .96; }.orbit-core span { position: absolute; bottom: 14px; color: var(--dim); font: 7px/1 var(--font-mono); letter-spacing: .08em; }
.orbit-node { position: absolute; z-index: 3; width: 138px; min-height: 54px; padding: 8px 12px; display: flex; align-items: center; gap: 9px; text-align: left; border: 1px solid var(--line-strong); border-radius: var(--radius); background: rgba(10,16,26,.94); font-size: 12px; cursor: pointer; box-shadow: 0 16px 35px rgba(4,9,18,.3); transition: transform .4s var(--ease), border-color .3s ease, background .3s ease; }
.orbit-node span { color: var(--dim); font: 9px/1 var(--font-mono); }.orbit-node:hover { transform: scale(1.04); }.orbit-node.is-active { border-color: var(--cobalt-bright); background: rgba(36,92,255,.18); }
.node-1 { top: 4%; left: calc(50% - 69px); }.node-2 { top: 24%; right: 1%; }.node-3 { right: 5%; bottom: 20%; }.node-4 { bottom: 3%; left: calc(50% - 69px); }.node-5 { left: 1%; bottom: 20%; }.node-6 { top: 24%; left: -2%; }

.scenarios-section { padding-block: var(--section); border-block: 1px solid var(--line); background: rgba(10,16,26,.94); }
.scenario-filter, .about-switch { margin-top: 44px; display: flex; flex-wrap: wrap; gap: 8px; }
.scenario-filter button, .about-switch button { min-height: 46px; padding: 0 17px; border: 1px solid var(--line); border-radius: var(--radius); background: transparent; color: var(--muted); font-size: 11px; cursor: pointer; transition: color .3s ease, border-color .3s ease, background .3s ease; }
.scenario-filter button:hover, .scenario-filter button.is-active, .about-switch button:hover, .about-switch button.is-active { color: var(--ice); border-color: var(--cobalt-bright); background: var(--cobalt-soft); }
.scenario-layout { margin-top: 46px; display: grid; grid-template-columns: .88fr 1.12fr; gap: clamp(42px,7vw,100px); align-items: start; }
.scenario-list { border-top: 1px solid var(--line-strong); }
.scenario-list article { padding: 24px 8px; border-bottom: 1px solid var(--line); cursor: pointer; transition: opacity .3s ease, padding .35s var(--ease), background .3s ease; }
.scenario-list article:hover, .scenario-list article:focus { padding-inline: 20px; background: rgba(36,92,255,.08); outline-offset: -2px; }
.scenario-list article.is-filtered { display: none; }.scenario-list span { color: var(--cobalt-bright); font-size: 10px; }.scenario-list h3 { margin: 9px 0 8px; font-size: clamp(20px,2vw,28px); letter-spacing: -.025em; }.scenario-list p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.72; }
.scenario-placeholder { min-height: 590px; position: sticky; top: 110px; }

.path-section { padding-block: var(--section); overflow: clip; }
.path-layout { margin-top: 84px; display: grid; grid-template-columns: 190px minmax(300px,.9fr) minmax(400px,1.1fr); gap: clamp(35px,5vw,74px); align-items: start; }
.path-nav { min-height: 340px; position: sticky; top: 110px; padding-left: 26px; display: flex; flex-direction: column; border-left: 1px solid var(--line); }
.path-nav button { min-height: 58px; padding: 0; display: flex; align-items: center; gap: 12px; color: var(--dim); text-align: left; border: 0; background: transparent; font-size: 11px; cursor: pointer; transition: color .3s ease, transform .35s var(--ease); }
.path-nav button span { font: 9px/1 var(--font-mono); }.path-nav button:hover, .path-nav button.is-active { color: var(--ice); transform: translateX(5px); }.path-nav button.is-active span { color: var(--cobalt-bright); }
.path-progress { position: absolute; top: 0; bottom: 0; left: -1px; width: 2px; background: transparent; }.path-progress i { width: 2px; height: 20%; display: block; background: var(--cobalt-bright); box-shadow: 0 0 14px rgba(95,135,255,.65); transition: transform .55s var(--ease); transform-origin: top; }
.path-step { min-height: 66vh; padding: 4px 0 100px; opacity: .32; transition: opacity .45s ease, transform .55s var(--ease); transform: translateY(16px); }
.path-step.is-active { opacity: 1; transform: none; }
.path-step > span { color: var(--cobalt-bright); font: 9px/1 var(--font-mono); letter-spacing: .1em; }
.path-step h3 { margin: 20px 0; font-size: clamp(37px,4.4vw,65px); line-height: 1; letter-spacing: -.048em; }
.path-step p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.85; }
.path-step ul { margin: 30px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; list-style: none; }.path-step li { padding: 10px 12px; color: var(--dim); border: 1px solid var(--line); font-size: 10px; }
.path-visual { min-height: 610px; position: sticky; top: 98px; display: grid; align-content: end; }
.path-radar { width: 290px; aspect-ratio: 1; position: absolute; top: 0; right: 6%; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; }.path-radar::before, .path-radar::after, .path-radar i { content: ""; position: absolute; border: 1px solid var(--line); border-radius: 50%; }.path-radar::before { inset: 19%; }.path-radar::after { inset: 38%; border-color: rgba(95,135,255,.45); }.path-radar i:nth-child(1) { inset: -1px; border-top-color: var(--cobalt-bright); animation: spin 10s linear infinite; }.path-radar i:nth-child(2) { inset: 19%; border-left-color: rgba(95,135,255,.7); animation: spin-reverse 8s linear infinite; }.path-radar i:nth-child(3) { width: 48%; height: 1px; top: 50%; left: 50%; margin-top: -.5px; border: 0; border-radius: 0; background: var(--line-strong); transform-origin: 0 50%; animation: spin 7s linear infinite; }.path-radar b { color: var(--ice); font: 300 54px/1 var(--font-mono); }
.path-placeholder { min-height: 330px; position: relative; z-index: 2; background-color: rgba(9,15,24,.9); }

.delivery-section { padding-block: var(--section); display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(52px,8vw,120px); align-items: center; border-top: 1px solid var(--line); }
.delivery-copy > p { max-width: 560px; }.delivery-details { margin-top: 48px; border-top: 1px solid var(--line-strong); }.delivery-details details { border-bottom: 1px solid var(--line); }.delivery-details summary { min-height: 62px; display: flex; align-items: center; justify-content: space-between; gap: 20px; cursor: pointer; font-weight: 700; list-style: none; }.delivery-details summary::-webkit-details-marker { display: none; }.delivery-details summary::after { content: "+"; color: var(--cobalt-bright); font-size: 22px; transition: transform .3s var(--ease); }.delivery-details details[open] summary::after { transform: rotate(45deg); }.delivery-details p { margin: -2px 0 21px; color: var(--muted); line-height: 1.75; }.delivery-placeholder { min-height: 680px; }

.cases-section { padding-block: var(--section); overflow: clip; border-block: 1px solid var(--line); background: rgba(10,16,26,.95); }
.cases-head, .insights-head { display: flex; align-items: end; justify-content: space-between; gap: 50px; }.cases-head > div:first-child { max-width: 820px; }.case-controls, .slider-controls { display: flex; align-items: center; gap: 12px; }.case-controls button, .slider-controls button { width: 48px; height: 48px; border: 1px solid var(--line-strong); border-radius: var(--radius); background: transparent; color: var(--ice); cursor: pointer; transition: background .3s ease, border-color .3s ease; }.case-controls button:hover, .slider-controls button:hover { border-color: var(--cobalt-bright); background: var(--cobalt-soft); }.case-controls span { min-width: 76px; color: var(--dim); text-align: center; font: 10px/1 var(--font-mono); }.case-controls b { color: var(--ice); font-weight: 500; }
.case-stage { min-height: 700px; margin-top: 64px; position: relative; display: grid; grid-template-columns: 1.2fr .8fr; grid-template-rows: 1fr auto; gap: 30px clamp(42px,6vw,90px); }.case-rail { position: absolute; inset: 6% -6% auto 42%; width: 58%; aspect-ratio: 1; border: 1px solid var(--line); border-radius: 50%; transform: rotate(-24deg); }.case-rail::before { content: ""; position: absolute; inset: 14%; border: 1px solid var(--line); border-radius: 50%; }.case-placeholder { grid-row: 1 / span 2; min-height: 700px; transition: opacity .25s ease, transform .45s var(--ease); }.case-placeholder.is-changing { opacity: .35; transform: scale(.985); }.case-copy { position: relative; z-index: 2; align-self: end; padding-top: 30px; border-top: 1px solid var(--line-strong); }.case-copy > span { color: var(--cobalt-bright); font: 9px/1 var(--font-mono); letter-spacing: .1em; }.case-copy h3 { margin: 21px 0 18px; font-size: clamp(32px,3.4vw,50px); line-height: 1.05; letter-spacing: -.04em; }.case-copy p { margin: 0; color: var(--muted); line-height: 1.8; }.case-copy ul { margin: 24px 0 0; padding: 0; list-style: none; }.case-copy li { padding: 11px 0; color: var(--dim); border-bottom: 1px solid var(--line); font-size: 11px; }.case-orbit { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; }.case-orbit button { min-height: 74px; padding: 12px; display: flex; flex-direction: column; justify-content: center; gap: 9px; text-align: left; color: var(--muted); border: 1px solid var(--line); border-radius: var(--radius); background: rgba(14,22,34,.82); cursor: pointer; transition: transform .35s var(--ease), border-color .3s ease, background .3s ease; }.case-orbit button span { color: var(--dim); font: 8px/1 var(--font-mono); }.case-orbit button:hover { transform: translateY(-4px); }.case-orbit button.is-active { color: var(--ice); border-color: var(--cobalt-bright); background: var(--cobalt-soft); }

.about-sylva-section { padding-top: var(--section); overflow: clip; border-block: 1px solid var(--line); background: #050a14; }
.about-sylva-heading { padding-bottom: clamp(34px,4vw,58px); display: flex; align-items: end; justify-content: space-between; gap: clamp(32px,7vw,110px); }
.about-sylva-heading > div { max-width: 760px; }
.about-sylva-heading .eyebrow { margin-bottom: 20px; }
.about-sylva-heading h2 { margin: 0; }
.about-sylva-heading > p { width: min(100%,480px); margin: 0 0 7px; color: var(--muted); font-size: 13px; line-height: 1.8; }
.sylva-frame-wrap { position: relative; width: 100%; height: clamp(720px,55vw,1045px); overflow: hidden; border-top: 1px solid rgba(92,125,255,.18); background: #050b16; box-shadow: inset 0 1px rgba(255,255,255,.025); }
.sylva-frame { position: absolute; inset: 0; display: block; width: 100%; height: 100%; border: 0; background: #050b16; }

.insights-section { padding-bottom: var(--section); }.insights-head > div:first-child { max-width: 840px; }.insight-track { margin-top: 55px; display: grid; grid-auto-flow: column; grid-auto-columns: minmax(340px, 1fr); gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; }.insight-track::-webkit-scrollbar { display: none; }.insight-card { scroll-snap-align: start; padding-bottom: 28px; border-bottom: 1px solid var(--line-strong); }.insight-placeholder { min-height: 360px; }.insight-card > span { margin-top: 22px; display: block; color: var(--cobalt-bright); font-size: 10px; }.insight-card h3 { margin: 12px 0 9px; font-size: 24px; letter-spacing: -.025em; }.insight-card > p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }.insight-card > a { min-height: 44px; margin-top: 16px; display: inline-flex; align-items: center; color: var(--ice); font-size: 11px; border-bottom: 1px solid var(--line-strong); }

.booking-section { overflow: hidden; border-top: 1px solid var(--line); background: linear-gradient(135deg,rgba(36,92,255,.14),transparent 45%),var(--deep); }.booking-inner { padding-block: var(--section); display: grid; grid-template-columns: .82fr 1.18fr; gap: clamp(64px,10vw,160px); }.booking-copy { position: sticky; top: 120px; align-self: start; }.booking-copy > p { max-width: 510px; }.booking-copy img { width: 220px; height: auto; margin-top: 70px; opacity: .2; }.booking-form { padding: clamp(28px,4.5vw,58px); border: 1px solid var(--line-strong); background: rgba(14,22,34,.82); box-shadow: inset 0 1px rgba(238,244,255,.03); }.field-row { margin-bottom: 27px; }.field-row label, .stage-choice legend { margin-bottom: 10px; display: block; color: var(--muted); font-size: 11px; }.field-row input, .field-row textarea { width: 100%; color: var(--ice); border: 0; border-bottom: 1px solid var(--line-strong); border-radius: 0; background: transparent; outline: 0; }.field-row input { height: 50px; }.field-row textarea { min-height: 130px; padding: 12px 0; resize: vertical; }.field-row input:focus, .field-row textarea:focus { border-color: var(--cobalt-bright); box-shadow: 0 1px var(--cobalt-bright); }.field-row input[aria-invalid="true"], .field-row textarea[aria-invalid="true"] { border-color: var(--danger); }.field-error { min-height: 18px; margin-top: 7px; display: block; color: var(--danger); font-size: 10px; }.stage-choice { margin: 0 0 27px; padding: 0; border: 0; }.stage-choice > label { min-height: 48px; padding: 0 14px; display: flex; align-items: center; border: 1px solid var(--line); border-bottom: 0; color: var(--muted); cursor: pointer; }.stage-choice > label:last-child { border-bottom: 1px solid var(--line); }.stage-choice input, .consent input { width: 18px; height: 18px; margin: 0 12px 0 0; accent-color: var(--cobalt); }.stage-choice label:has(input:checked) { color: var(--ice); border-color: rgba(95,135,255,.58); background: var(--cobalt-soft); }.consent { min-height: 44px; display: flex; align-items: center; color: var(--muted); font-size: 11px; cursor: pointer; }.consent-error { margin-top: -2px; }.booking-form > .button { margin-top: 10px; }.form-note { margin: 20px 0 0; color: var(--dim); font-size: 10px; line-height: 1.6; }

.site-footer { padding-block: 42px 24px; border-top: 1px solid var(--line); background: var(--void); }.footer-main, .footer-meta { display: flex; align-items: center; justify-content: space-between; gap: 28px; }.footer-brand { display: flex; align-items: center; gap: 17px; }.footer-brand img { display: block; width: 92px; height: auto; object-fit: contain; flex: 0 0 auto; }.footer-brand strong, .footer-brand span { display: block; }.footer-brand strong { font-size: 13px; }.footer-brand span { margin-top: 5px; color: var(--dim); font: 7px/1 var(--font-mono); letter-spacing: .12em; }.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 22px; }.footer-links a, .footer-links > span { min-height: 44px; display: inline-flex; align-items: center; color: var(--muted); font-size: 11px; }.footer-links a:hover { color: var(--ice); }.footer-links > span { opacity: .55; }.footer-meta { margin-top: 36px; padding-top: 20px; color: var(--dim); border-top: 1px solid var(--line); font: 8px/1.4 var(--font-mono); letter-spacing: .08em; }

.booking-dialog { width: min(680px,calc(100vw - 32px)); padding: clamp(28px,5vw,52px); color: var(--ice); border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--surface); }.booking-dialog::backdrop { background: rgba(7,11,18,.86); backdrop-filter: blur(8px); }.booking-dialog > p { margin: 0 0 15px; color: var(--cobalt-bright); font: 9px/1 var(--font-mono); letter-spacing: .12em; }.booking-dialog h2 { margin: 0 0 26px; font-size: clamp(30px,5vw,46px); letter-spacing: -.04em; }.booking-dialog pre { max-height: 300px; margin: 0; padding: 20px; overflow: auto; color: var(--muted); border: 1px solid var(--line); background: var(--deep); font: 13px/1.75 var(--font-sans); white-space: pre-wrap; }.dialog-close { position: absolute; top: 14px; right: 14px; width: 44px; height: 44px; color: var(--ice); border: 1px solid var(--line); background: transparent; cursor: pointer; }.dialog-actions { margin-top: 24px; display: flex; align-items: center; gap: 18px; }.text-button { min-height: 44px; color: var(--muted); border: 0; background: transparent; cursor: pointer; }.dialog-status { min-height: 20px; margin-top: 12px; display: block; color: var(--cobalt-bright); font-size: 11px; }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes spin-reverse { to { transform: rotate(-360deg); } }
@keyframes scroll-pulse { 0%,100% { opacity: .3; transform: scaleY(.55); transform-origin: top; } 50% { opacity: 1; transform: scaleY(1); } }
@keyframes marquee { to { transform: translateX(-50%); } }
@keyframes detail-in { from { opacity: .25; transform: translateY(9px); } to { opacity: 1; transform: none; } }

@media (max-width: 1160px) {
  :root { --shell: min(100% - 56px, 1120px); }
  .site-header { padding-inline: 28px; grid-template-columns: auto auto 1fr auto; }.menu-toggle { display: block; justify-self: end; grid-column: 3; }.site-nav { position: fixed; top: 74px; left: 18px; right: 18px; padding: 18px; display: none; flex-direction: column; align-items: stretch; gap: 0; border: 1px solid var(--line-strong); background: rgba(7,11,18,.97); }.site-nav.is-open { display: flex; }.site-nav a { padding-inline: 12px; border-bottom: 1px solid var(--line); }.site-header > .button { grid-column: 4; }
  .hero-copy { grid-column: 1 / span 7; }.hero-visual { grid-column: 8 / -1; }.hero-placeholder { width: 92%; }
  .solution-card-primary, .solution-card:not(.solution-card-primary):not(.solution-card-wide), .solution-card-wide { grid-column: span 3; }.solution-preview { grid-column: 7 / -1; grid-row: 1 / span 2; }
  .capabilities-section { grid-template-columns: 1fr; }.capability-orbit { width: min(82vw,680px); justify-self: center; }.capability-copy { max-width: 860px; }
  .path-layout { grid-template-columns: 160px 1fr; }.path-visual { display: none; }
}

@media (max-width: 820px) {
  :root { --shell: min(100% - 36px, 760px); --section: 96px; }
  .site-header { padding-inline: 18px; grid-template-columns: auto 1fr auto; }.site-header > .button { display: none; }.menu-toggle { grid-column: 3; }.brand-lockup span { display: none; }
  .hero { min-height: auto; }.hero-inner { padding-top: 128px; padding-bottom: 110px; display: block; }.hero h1 { font-size: clamp(54px,16vw,92px); }.hero-copy { position: relative; z-index: 5; }.hero-intro { max-width: 520px; }.hero-principles { display: grid; grid-template-columns: 1fr; gap: 12px; }.hero-visual { min-height: 530px; margin-top: 44px; }.hero-orbit { width: min(88vw,520px); }.scroll-cue { display: none; }
  .problem-layout { grid-template-columns: 1fr; }.problem-index { min-height: auto; flex-direction: row; align-items: end; }.problem-index strong { font-size: 72px; }
  .business-value-inner { grid-template-columns: 1fr; gap: 34px; }.business-value-inner h2 { font-size: clamp(45px,13vw,74px); }
  .solution-bento { grid-template-columns: 1fr; grid-auto-rows: auto; }.solution-card-primary, .solution-card:not(.solution-card-primary):not(.solution-card-wide), .solution-card-wide, .solution-preview { grid-column: 1; grid-row: auto; }.solution-card-primary { min-height: 300px; }.solution-card:not(.solution-card-primary) { min-height: 230px; }.solution-preview { min-height: 420px; }
  .scenario-layout, .delivery-section, .booking-inner, .case-stage { grid-template-columns: 1fr; }.scenario-placeholder { min-height: 460px; position: static; }.delivery-placeholder { min-height: 520px; }.case-stage { min-height: auto; }.case-placeholder { grid-row: auto; min-height: 520px; }.case-rail { display: none; }.cases-head, .insights-head { align-items: flex-start; flex-direction: column; }.case-copy { margin-top: 12px; }
  .about-sylva-heading { align-items: flex-start; flex-direction: column; }.sylva-frame-wrap { height: clamp(780px,214vw,1100px); }
  .path-layout { display: block; }.path-nav { min-height: auto; margin-bottom: 36px; padding: 0 0 14px; position: sticky; top: 66px; z-index: 8; flex-direction: row; overflow-x: auto; border: 0; border-bottom: 1px solid var(--line); background: rgba(7,11,18,.96); scrollbar-width: none; }.path-nav button { min-width: 124px; }.path-progress { top: auto; bottom: 0; left: 0; right: 0; width: auto; height: 2px; }.path-progress i { width: 20%; height: 2px; transition: transform .55s var(--ease); }.path-step { min-height: 62vh; padding-bottom: 80px; }
  .booking-copy { position: static; }.booking-copy img { display: none; }
  .footer-main { align-items: flex-start; flex-direction: column; }.footer-links { justify-content: flex-start; }
}

@media (max-width: 560px) {
  :root { --shell: calc(100% - 28px); --section: 82px; }
  .site-header { min-height: 64px; }.site-nav { top: 64px; }.brand-lockup img { width: 56px; }
  .hero-inner { padding-top: 104px; }.hero h1 { font-size: clamp(44px,13vw,54px); }.hero-actions { align-items: stretch; flex-direction: column; gap: 8px; }.hero-actions .button, .hero-actions .text-link { width: 100%; justify-content: center; }.hero-visual { min-height: 430px; }.hero-placeholder { min-height: 230px; }.hero-telemetry { display: none; }
  .section-heading h2, .capability-copy h2, .path-lead h2, .delivery-copy h2, .cases-head h2, .about-copy h2, .insights-head h2, .booking-copy h2 { font-size: clamp(37px,10.5vw,52px); line-height: 1.04; }.section-heading > p, .capability-copy > p, .path-lead > p, .delivery-copy > p, .cases-head p, .about-copy > p, .insights-head p, .booking-copy > p { font-size: 14px; }
  .problem-layout { margin-top: 52px; }.accordion-item button { grid-template-columns: 34px 1fr 28px; gap: 9px; }.accordion-content p { margin-inline: 43px 34px; }
  .capability-orbit { width: 100%; aspect-ratio: auto; padding: 190px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }.orbit-lines { width: 184px; height: 184px; top: 0; left: calc(50% - 92px); }.orbit-core { width: 88px; position: absolute; top: 48px; left: calc(50% - 44px); }.orbit-core span { display: none; }.orbit-node { width: 100%; min-height: 52px; position: static; }.orbit-node:hover { transform: none; }
  .scenario-filter { display: grid; grid-template-columns: 1fr 1fr; }.scenario-filter button { padding-inline: 10px; }.scenario-placeholder, .delivery-placeholder, .about-placeholder, .case-placeholder { min-height: 410px; }
  .case-orbit { grid-template-columns: 1fr; }.case-orbit button { min-height: 58px; flex-direction: row; align-items: center; }.case-controls { width: 100%; justify-content: space-between; }
  .insight-track { grid-auto-columns: 88%; }.insight-placeholder { min-height: 320px; }.slider-controls { width: 100%; justify-content: flex-end; }
  .booking-form { padding: 24px 18px; }.dialog-actions { align-items: stretch; flex-direction: column; }.dialog-actions .button, .dialog-actions .text-button { width: 100%; }
  .footer-meta { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .flow-engine { opacity: .34; }
  .js .reveal { opacity: 1; transform: none; }
}

/* ── Particle-logo homepage and editorial case catalogue ─────────────── */
.particle-home {
  position: relative;
  min-height: 100svh;
  background: #edf2fa;
  border-bottom: 1px solid rgba(34,58,111,.12);
}
.sylva-frame-wrap--home {
  height: 185svh;
  padding: 0;
  border-top: 0;
  background: #edf2fa;
}
.home-page .site-header {
  opacity: 0;
  transform: translateY(-14px);
  pointer-events: none;
}
.home-page .site-header.is-after-hero {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.case-catalog {
  margin-top: 60px;
  display: grid;
  grid-template-columns: repeat(3,minmax(0,1fr));
  gap: 16px;
}
.case-card {
  min-width: 0;
  display: block;
  color: var(--ice);
  border: 1px solid rgba(34,58,111,.12);
  background: rgba(248,250,254,.72);
  box-shadow: 0 24px 58px rgba(48,69,117,.07);
  transition: transform .5s var(--ease), box-shadow .5s var(--ease), border-color .35s ease;
}
.case-card:first-child { grid-column: span 2; }
.case-card:last-child {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.4fr .6fr;
}
.case-card:hover {
  transform: translateY(-7px);
  border-color: rgba(35,79,255,.38);
  box-shadow: 0 34px 75px rgba(48,69,117,.12);
}
.case-video-placeholder {
  min-height: 390px;
  border: 0;
  border-bottom: 1px solid rgba(34,58,111,.12);
}
.case-card:first-child .case-video-placeholder { min-height: 480px; }
.case-card:last-child .case-video-placeholder {
  min-height: 360px;
  border-right: 1px solid rgba(34,58,111,.12);
  border-bottom: 0;
}
.case-card-copy { padding: 28px 30px 31px; }
.case-card-copy > span {
  color: var(--cobalt-bright);
  font: 9px/1.2 var(--font-mono);
  letter-spacing: .12em;
}
.case-card-copy h3 {
  margin: 15px 0 12px;
  font-size: clamp(25px,2.3vw,38px);
  line-height: 1.04;
  letter-spacing: -.038em;
}
.case-card-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.72;
}
.case-card-copy b {
  min-height: 44px;
  margin-top: 19px;
  display: inline-flex;
  align-items: center;
  color: var(--ice);
  border-bottom: 1px solid rgba(35,79,255,.35);
  font-size: 11px;
}

@media (max-width: 820px) {
  .sylva-frame-wrap--home { height: 165svh; }
  .case-catalog { grid-template-columns: 1fr; }
  .case-card:first-child,
  .case-card:last-child { grid-column: auto; }
  .case-card:last-child { display: block; }
  .case-card:first-child .case-video-placeholder,
  .case-video-placeholder,
  .case-card:last-child .case-video-placeholder { min-height: 340px; border-right: 0; border-bottom: 1px solid rgba(34,58,111,.12); }
}

@media (max-width: 560px) {
  .sylva-frame-wrap--home { height: 155svh; }
  .case-catalog { margin-top: 38px; }
  .case-video-placeholder,
  .case-card:first-child .case-video-placeholder,
  .case-card:last-child .case-video-placeholder { min-height: 285px; }
  .case-card-copy { padding: 23px 22px 25px; }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header.is-scrolled, .site-nav, .booking-form, .hero-placeholder { background: var(--deep); backdrop-filter: none; }
}

/* ─────────────────────────────────────────────────────────────
   NAIQIU LIGHT SYSTEM / porcelain, mist blue, liquid silver
   The rules below intentionally sit last: they translate the
   existing interaction system without flattening its depth.
   ───────────────────────────────────────────────────────────── */
:root {
  --void: #f3f6fc;
  --deep: #e9eef8;
  --surface: #f8faff;
  --surface-2: #e3e9f4;
  --ice: #101a35;
  --muted: #52617a;
  --dim: #78869e;
  --cobalt: #234fff;
  --cobalt-bright: #315cff;
  --cobalt-soft: rgba(35,79,255,.085);
  --line: rgba(36,58,106,.105);
  --line-strong: rgba(36,58,106,.21);
  --danger: #b63751;
}

html, body { background: var(--void); }
body { overflow-x: clip; }
body::after {
  background:
    radial-gradient(circle at 76% 12%, rgba(61,103,255,.115), transparent 25%),
    radial-gradient(circle at 12% 54%, rgba(153,174,219,.13), transparent 29%),
    linear-gradient(180deg, #f5f7fc 0%, #edf2fa 54%, #f6f8fc 100%);
}
::selection { color: #f8faff; background: rgba(35,79,255,.82); }
.flow-engine { opacity: .42; }
.grain { opacity: .018; mix-blend-mode: multiply; }

.site-header { color: var(--ice); }
.site-header.is-scrolled {
  border-color: rgba(32,54,105,.12);
  background: rgba(247,249,253,.86);
  box-shadow: 0 10px 38px rgba(45,65,108,.07);
}
.site-nav a:hover, .site-nav a.is-active { color: var(--ice); }
.button { color: #f8faff; border-color: #234fff; box-shadow: 0 14px 34px rgba(35,79,255,.18); }
.button:hover { background: #173ed8; }
.text-link { color: var(--ice); }

.hero {
  background:
    radial-gradient(circle at 78% 45%, rgba(49,92,255,.095), transparent 31%),
    linear-gradient(115deg, rgba(249,250,253,.96) 12%, rgba(240,244,251,.9) 55%, rgba(231,237,248,.88));
}
.hero-grid { opacity: .55; mask-image: linear-gradient(90deg, rgba(0,0,0,.72), rgba(0,0,0,.18) 76%, transparent); }
.hero-vignette {
  background:
    radial-gradient(ellipse 68% 62% at 72% 47%, transparent 32%, rgba(244,247,252,.4) 84%),
    linear-gradient(90deg, rgba(248,250,253,.97) 0%, rgba(248,250,253,.26) 58%, rgba(231,237,248,.55) 100%);
}
.hero h1 { color: #111b36; font-weight: 760; text-shadow: 0 1px rgba(255,255,255,.65); }
.hero-orbit { border-color: rgba(38,65,128,.13); filter: drop-shadow(0 30px 55px rgba(53,77,127,.1)); }
.hero-core {
  width: 94px;
  color: var(--ice);
  border-color: rgba(49,92,255,.28);
  background: rgba(248,250,255,.94);
  box-shadow: 0 22px 58px rgba(57,78,127,.14), inset 0 0 0 1px rgba(255,255,255,.9);
}
.hero-core img { width: 62px; }
.signal { box-shadow: 0 0 20px rgba(49,92,255,.45); }
.system-node {
  position: absolute;
  z-index: 4;
  min-width: 112px;
  padding: 12px 14px 11px;
  color: #34415c;
  border: 1px solid rgba(37,65,125,.14);
  background: rgba(249,251,255,.9);
  box-shadow: 0 16px 34px rgba(58,78,119,.1);
  font: 10px/1.2 var(--font-sans);
  letter-spacing: .06em;
}
.system-node::before { content: ""; position: absolute; left: -1px; top: -1px; width: 28%; height: 2px; background: var(--cobalt-bright); }
.system-node-a { left: -7%; top: 27%; }
.system-node-b { right: -8%; top: 22%; }
.system-node-c { left: 4%; bottom: 16%; }
.system-node-d { right: -2%; bottom: 22%; }

.manifesto { background: rgba(239,243,251,.94); }
.manifesto-track { color: #5f6f8a; }

.media-placeholder {
  border-color: rgba(35,79,255,.30);
  background-color: rgba(247,249,253,.84);
  background-image:
    linear-gradient(rgba(42,68,126,.047) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42,68,126,.047) 1px, transparent 1px);
  box-shadow: inset 0 1px rgba(255,255,255,.92), 0 22px 60px rgba(65,83,120,.065);
}

.about-sylva-section {
  padding-top: var(--section);
  overflow: visible;
  background: linear-gradient(180deg, #eef3fb 0%, #f7f9fd 55%, #edf2fa 100%);
}
.about-sylva-heading h2,
.company-lead h2 { margin: 0; font-size: clamp(42px,5.25vw,78px); line-height: .96; letter-spacing: -.048em; font-weight: 760; text-wrap: balance; }
.sylva-frame-wrap {
  height: 180svh;
  overflow: visible;
  border-top-color: rgba(42,65,115,.10);
  background: #edf2fa;
  box-shadow: inset 0 1px rgba(255,255,255,.72);
}
.sylva-sticky {
  position: sticky;
  top: 0;
  height: 100svh;
  overflow: hidden;
}
.sylva-frame {
  position: absolute;
  inset: 0;
  height: 100%;
  background: #edf2fa;
}

.solutions-section { background: rgba(232,238,248,.82); }
.business-value-section { background: rgba(244,247,252,.88); }
.solution-card {
  color: var(--ice);
  border-color: rgba(34,58,111,.115);
  background: rgba(248,250,254,.83);
  box-shadow: 0 20px 50px rgba(59,77,116,.055);
}
.solution-card:hover { box-shadow: 0 27px 60px rgba(56,76,119,.1); }
.solution-card.is-active {
  border-color: rgba(35,79,255,.48);
  background: linear-gradient(145deg, rgba(248,250,255,.92), rgba(223,231,248,.9));
  box-shadow: inset 0 1px rgba(248,250,255,.9), 0 26px 62px rgba(48,69,117,.09);
}
.solution-preview { background: rgba(239,244,251,.9); }

.orbit-core {
  border-color: rgba(35,79,255,.32);
  background: rgba(248,250,255,.94);
  box-shadow: 0 28px 75px rgba(48,70,121,.14), inset 0 1px rgba(255,255,255,.95);
}
.orbit-node {
  color: var(--ice);
  background: rgba(248,250,254,.92);
  box-shadow: 0 15px 35px rgba(52,73,117,.1);
}
.orbit-node.is-active { background: rgba(226,233,250,.98); }

.scenarios-section { background: rgba(232,238,248,.84); }
.scenario-filter button:hover, .scenario-filter button.is-active,
.about-switch button:hover, .about-switch button.is-active { color: var(--ice); }
.path-placeholder { background-color: rgba(247,249,253,.94); }
.delivery-section { background: rgba(248,250,253,.62); }

.cases-section {
  background:
    radial-gradient(circle at 78% 22%, rgba(49,92,255,.09), transparent 23%),
    linear-gradient(145deg, #e9eef8, #f5f7fc 68%);
}
.case-orbit button { color: var(--muted); background: rgba(248,250,254,.84); }
.case-orbit button.is-active { color: var(--ice); background: rgba(224,232,250,.96); }

.company-section { padding-block: var(--section); }
.company-lead { max-width: 900px; }
.company-lead > p:last-child { max-width: 650px; margin: 25px 0 0; color: var(--muted); font-size: 16px; line-height: 1.78; }
.company-grid { margin-top: 68px; display: grid; grid-template-columns: .92fr 1.08fr; gap: clamp(32px,5vw,74px); align-items: stretch; }
.company-statement {
  min-height: 610px;
  padding: clamp(30px,4vw,58px);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line-strong);
  background: linear-gradient(160deg, rgba(249,251,255,.98), rgba(229,235,247,.88));
  box-shadow: 0 28px 70px rgba(52,72,113,.08);
}
.company-statement > span { color: var(--cobalt-bright); font: 9px/1 var(--font-mono); letter-spacing: .13em; }
.company-statement h3 { max-width: 12ch; margin: auto 0 24px; font-size: clamp(34px,4vw,58px); line-height: 1.02; letter-spacing: -.045em; }
.company-statement > p { max-width: 50ch; margin: 0; color: var(--muted); line-height: 1.82; }
.company-statement dl { margin: 44px 0 0; border-top: 1px solid var(--line-strong); }
.company-statement dl > div { min-height: 62px; display: grid; grid-template-columns: 120px 1fr; align-items: center; border-bottom: 1px solid var(--line); }
.company-statement dt { color: var(--dim); font-size: 10px; }
.company-statement dd { margin: 0; font-size: 13px; }
.company-assets { display: grid; grid-template-rows: 1fr 1fr; gap: 14px; }
.company-placeholder { min-height: 298px; }

.insights-section { padding-top: var(--section); background: rgba(248,250,253,.5); }

.booking-section {
  background:
    radial-gradient(circle at 13% 22%, rgba(35,79,255,.10), transparent 28%),
    linear-gradient(145deg, #e7edf8, #f6f8fc 68%);
}
.booking-form {
  border-color: rgba(35,57,106,.16);
  background: rgba(249,251,255,.88);
  box-shadow: 0 28px 75px rgba(49,68,108,.09), inset 0 1px rgba(255,255,255,.96);
}
.wechat-placeholder {
  width: min(100%, 390px);
  min-height: 164px;
  margin-top: 48px;
  padding: 24px 26px 22px 150px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border: 1px dashed rgba(35,79,255,.30);
  background: rgba(248,250,254,.72);
}
.wechat-placeholder::before {
  content: "QR";
  position: absolute;
  left: 24px;
  top: 24px;
  width: 112px;
  height: 112px;
  display: grid;
  place-items: center;
  color: rgba(35,79,255,.55);
  border: 1px solid rgba(35,79,255,.28);
  background-image: linear-gradient(45deg, rgba(35,79,255,.08) 25%, transparent 25%, transparent 75%, rgba(35,79,255,.08) 75%), linear-gradient(45deg, rgba(35,79,255,.08) 25%, transparent 25%, transparent 75%, rgba(35,79,255,.08) 75%);
  background-position: 0 0, 7px 7px;
  background-size: 14px 14px;
  font: 10px/1 var(--font-mono);
}
.wechat-placeholder > span { color: var(--cobalt-bright); font: 8px/1 var(--font-mono); letter-spacing: .12em; }
.wechat-placeholder strong { margin-top: 12px; font-size: 15px; }
.wechat-placeholder p { margin: 8px 0 0; color: var(--muted); font-size: 10px; line-height: 1.6; }
.stage-choice label:has(input:checked) { color: var(--ice); }

.site-footer { background: #e9eef7; }
.booking-dialog {
  color: var(--ice);
  border-color: rgba(37,58,104,.18);
  background: #f6f8fc;
  box-shadow: 0 38px 100px rgba(31,49,87,.2);
}
.booking-dialog::backdrop { background: rgba(27,37,58,.38); }
.booking-dialog pre { background: #e9eef7; }
.dialog-close { color: var(--ice); }

@media (max-width: 1160px) {
  .site-nav { justify-self: stretch; }
  .system-node-a { left: -3%; }
  .system-node-b { right: -3%; }
}

@media (max-width: 820px) {
  .site-header.is-menu-open { background: rgba(247,249,253,.97); }
  .site-nav { background: rgba(247,249,253,.98); box-shadow: 0 22px 45px rgba(41,60,101,.10); }
  .hero { min-height: auto; }
  .hero-vignette { background: linear-gradient(180deg, rgba(248,250,253,.35), rgba(238,243,251,.76)); }
  .hero-visual { min-height: 490px; }
  .hero-orbit { width: min(88vw,490px); }
  .system-node { min-width: 92px; padding: 10px 11px; font-size: 9px; }
  .system-node-a { left: 0; top: 22%; }
  .system-node-b { right: 0; top: 19%; }
  .system-node-c { left: 4%; bottom: 19%; }
  .system-node-d { right: 1%; bottom: 24%; }
  .about-sylva-heading { align-items: flex-start; }
  .sylva-frame-wrap { height: 165svh; }
  .sylva-sticky { height: 100svh; }
  .company-grid { grid-template-columns: 1fr; }
  .company-statement { min-height: 520px; }
  .company-assets { grid-template-columns: 1fr 1fr; grid-template-rows: none; }
  .company-placeholder { min-height: 360px; }
}

@media (max-width: 560px) {
  .hero h1 { font-size: clamp(48px,15vw,68px); }
  .hero-principles { gap: 12px; }
  .system-node { min-width: 84px; }
  .sylva-frame-wrap { height: 155svh; }
  .company-assets { grid-template-columns: 1fr; }
  .company-statement { min-height: 480px; }
  .company-statement dl > div { grid-template-columns: 92px 1fr; }
  .company-placeholder { min-height: 285px; }
  .wechat-placeholder { padding: 154px 22px 22px; }
  .wechat-placeholder::before { left: 22px; top: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  .sylva-frame-wrap { height: 100svh; }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header.is-scrolled, .site-nav, .solution-card, .orbit-node, .booking-form { background: #f4f7fc; backdrop-filter: none; }
}

/* Keep the particle story taller than the viewport after the light-theme rules. */
.particle-home .sylva-frame-wrap--home { height: 185svh; }
@media (max-width: 820px) { .particle-home .sylva-frame-wrap--home { height: 165svh; } }
@media (max-width: 560px) { .particle-home .sylva-frame-wrap--home { height: 155svh; } }
@media (prefers-reduced-motion: reduce) { .particle-home .sylva-frame-wrap--home { height: 100svh; } }

/* Condensed homepage: one clear route from capability to proof to consultation. */
.home-method-section {
  padding-block: clamp(92px,10vw,150px);
  overflow: hidden;
  border-bottom: 1px solid rgba(34,58,111,.10);
  background:
    radial-gradient(circle at 78% 28%, rgba(35,79,255,.10), transparent 30%),
    #f3f6fc;
}
.home-method-inner {
  display: grid;
  grid-template-columns: minmax(0,.88fr) minmax(520px,1.12fr);
  gap: clamp(54px,8vw,130px);
  align-items: end;
}
.home-method-copy h2 {
  max-width: 11ch;
  margin: 0;
  color: var(--ice);
  font-size: clamp(42px,5.4vw,78px);
  font-weight: 720;
  line-height: .95;
  letter-spacing: -.048em;
  text-wrap: balance;
}
.home-method-copy > p:not(.eyebrow) {
  max-width: 580px;
  margin: 25px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}
.home-method-copy .text-link { margin-top: 28px; }
.home-method-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(34,58,111,.16);
  counter-reset: none;
}
.home-method-steps li {
  min-height: 82px;
  display: grid;
  grid-template-columns: 72px 1fr 28px;
  align-items: center;
  border-bottom: 1px solid rgba(34,58,111,.12);
  transition: padding .45s var(--ease), color .3s ease, border-color .3s ease;
}
.home-method-steps li::after {
  content: "↗";
  color: rgba(35,79,255,.38);
  font-size: 15px;
  transition: transform .45s var(--ease), color .3s ease;
}
.home-method-steps li:hover { padding-inline: 10px; border-color: rgba(35,79,255,.34); }
.home-method-steps li:hover::after { color: var(--cobalt-bright); transform: translate(3px,-3px); }
.home-method-steps span { color: var(--cobalt-bright); font: 9px/1 var(--font-mono); letter-spacing: .12em; }
.home-method-steps strong { color: var(--ice); font-size: clamp(19px,2vw,28px); font-weight: 560; letter-spacing: -.025em; }

@media (max-width: 980px) {
  .home-method-inner { grid-template-columns: 1fr; }
  .home-method-copy h2 { max-width: 14ch; }
}

@media (max-width: 560px) {
  .home-method-steps li { min-height: 70px; grid-template-columns: 54px 1fr 24px; }
}