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2.25rem);--measure:44rem;--wide:72rem;--header-h:3.75rem;--header-gap:.55rem;--header-offset:calc(var(--header-h) + var(--header-gap) * 2);--shadow-nav:0 8px 30px -14px #1919194d, 0 1px 2px #1919190d;--space-section:5.5rem;--space-section-head:2.5rem;--font-sans:"PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, -apple-system, sans-serif;--font-serif:var(--font-sans);--font-mono:ui-monospace, "SF Mono", "Cascadia Mono", "JetBrains Mono", Consolas, "Liberation Mono", monospace;--fs-xs:.75rem;--fs-sm:.875rem;--fs-md:1rem;--fs-lg:1.125rem;--fs-xl:1.65rem;--fs-2xl:clamp(1.8rem, 3.3vw, 2.65rem);--fs-hero:clamp(2.35rem, 5vw, 3.8rem);--ease:cubic-bezier(.22, .61, .36, 1);--ease-inout:cubic-bezier(.65, 0, .35, 1);--enter-ease:cubic-bezier(.16, 1, .3, 1);--enter-dur:.8s;--enter-dist:20px;--micro-fast:.15s;--micro-dur:.25s;--dur:.25s}[data-theme=dark]{--lightningcss-light: 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(max-width:720px){:root{--fs-xl:1.35rem;--fs-2xl:1.75rem;--space-section:3rem;--space-section-head:1.5rem}}:root{--tech-ink:#315c87;--explore-ink:#705393}[data-theme=dark]{--tech-ink:#93b9dd;--explore-ink:#c0a6df}*,:before,:after{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:var(--font-sans);font-size:var(--fs-md);color:var(--ink);background:var(--bg);background-image:radial-gradient(ellipse 54% 42% at 12% 9%, color-mix(in srgb, var(--tech-ink) 3.25%, transparent), transparent 76%), radial-gradient(ellipse 48% 38% at 88% 33%, color-mix(in srgb, var(--explore-ink) 2.75%, transparent), transparent 78%);transition:background-color var(--dur) var(--ease), color var(--dur) var(--ease);margin:0;line-height:1.75;overflow-x:clip}img,svg{max-width:100%;display:block}a{color:var(--accent);text-underline-offset:.18em;transition:color var(--micro-fast) 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minmax(22rem,1.08fr);align-items:center;gap:clamp(2rem,5vw,5rem);min-width:0;max-width:100%;margin-inline:auto;display:grid}.hero.is-pinned{min-height:152vh;overflow:visible}.hero.is-pinned .hero-layout{min-height:calc(152vh - var(--header-offset) - 3rem);align-items:start}.hero.is-pinned .hero-flow{top:calc(var(--header-offset) + .4rem);min-height:calc(100vh - var(--header-offset) - .4rem);flex-direction:column;justify-content:center;align-self:start;display:flex;position:sticky}.hero-copy{width:100%;min-width:0;max-width:38rem}.hero h1,.hero strong{color:var(--field-ink)}.hero .lede{overflow-wrap:anywhere;width:100%;max-width:38rem}.hero .eyebrow,.hero .lede{color:color-mix(in srgb, var(--field-ink) 76%, var(--signal-cool))}.hero .eyebrow:after{background:linear-gradient(90deg, color-mix(in srgb, var(--field-ink) 30%, transparent), transparent)}.hero-flow{width:100%;min-width:0;margin:0;overflow:hidden}.flow-caption,.flow-foot{color:color-mix(in srgb, var(--field-ink) 68%, 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.flow-layer-back{display:none}.flow-canvas-host{position:absolute;inset:0}.flow-canvas{width:100%;height:100%;display:block;position:absolute;inset:0}.flow-stages{gap:.5rem;margin:0;padding:0;list-style:none;display:none}.flow-stages li{border:1px solid color-mix(in srgb, var(--field-ink) 24%, transparent);border-radius:var(--radius-sm);color:var(--field-ink);font-size:var(--fs-sm);gap:.15rem;padding:.6rem .75rem;display:grid}.flow-stages b{color:var(--signal-warm);font-size:var(--fs-xs);letter-spacing:.1em;font-weight:500}.flow-stages em{color:var(--field-ink);font-size:var(--fs-sm);font-style:normal}.flow-stages span{color:color-mix(in srgb, var(--field-ink) 72%, var(--signal-cool));font-size:var(--fs-xs)}.section{padding:var(--space-section) 0;border-top:1px solid var(--line);scroll-margin-top:calc(var(--header-offset) + .75rem);position:relative}.section:first-child{border-top:0}.section-inner{width:min(var(--wide), 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var(--field-warm-ink) 82%, var(--field-warm));background:0 0}#contact a{color:var(--field-warm-ink)}#contact .copy-btn{color:color-mix(in srgb, var(--field-warm-ink) 82%, var(--field-warm));border-color:color-mix(in srgb, var(--field-warm-ink) 30%, transparent);background:0 0}#contact .copy-btn:hover{background:color-mix(in srgb, var(--field-warm-ink) 10%, transparent);border-color:var(--field-warm-ink);color:var(--field-warm-ink)}.site-footer{border-top:1px solid color-mix(in srgb, var(--field-warm-ink) 12%, var(--field-warm));padding:1.75rem 0 calc(1.75rem + env(safe-area-inset-bottom));background-color:var(--field-warm);background-image:radial-gradient(ellipse 48% 80% at 86% 20%, color-mix(in srgb, var(--proof-ink) 3.5%, transparent), transparent 76%), radial-gradient(ellipse 40% 72% at 16% 84%, color-mix(in srgb, var(--tech-ink) 2.5%, transparent), transparent 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var(--ease)}.node-start{fill:var(--signal-warm)}.node-judge{fill:var(--signal-cool)}.node-build{fill:var(--warm)}.node-proof{fill:var(--field-ink)}.flow-node.is-active{stroke:var(--signal-warm);stroke-width:3px}.flow-index{fill:color-mix(in srgb, var(--field-ink) 50%, var(--signal-cool));font:11px var(--font-sans)}.flow-label{fill:color-mix(in srgb, var(--field-ink) 82%, var(--signal-cool));font:13px var(--font-sans);transition:fill var(--micro-fast) var(--ease)}.flow-label.is-active{fill:var(--field-ink);font-weight:600}.flow-note{fill:color-mix(in srgb, var(--field-ink) 58%, var(--warm));font:11px var(--font-sans)}@keyframes flow-trace{to{stroke-dashoffset:-88px}}@keyframes flow-orbit{to{opacity:.5;transform:scale(1.1)}}@media (max-width:860px){.nav{top:calc(var(--header-offset) + .3rem);width:min(calc(100vw - var(--pad) * 2), 22rem);max-height:calc(100vh - var(--header-offset) - 1.25rem);border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow-nav);border-radius:1.1rem;flex-direction:column;align-items:stretch;gap:.1rem;padding:.55rem;display:none;position:fixed;left:50%;overflow-y:auto;transform:translate(-50%)}.nav.is-open{display:flex}.nav-indicator{display:none}.nav a{border-radius:.7rem;padding:.7rem .75rem}.nav-divider{display:none}.nav-divider--inner{width:auto;height:1px;margin:.35rem .4rem;display:block}.header-actions{flex-wrap:wrap;padding:0 .15rem .1rem}.nav-cta{margin-left:auto}.menu-toggle{display:inline-flex}}@media (max-width:720px){.hero,#contact{width:auto;margin-left:calc(-1 * var(--pad));margin-right:calc(-1 * var(--pad));padding-inline:var(--pad)}.hero-layout{grid-template-columns:minmax(0,1fr);gap:1.4rem;width:100%;max-width:100%}.hero-copy,.hero 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