:root {
  color-scheme: light;
  --paper: #fbf8f1;
  --paper-strong: #fffdf8;
  --paper-violet: #f2effd;
  --ink: #28242a;
  --ink-soft: #645e67;
  --ink-faint: #8b8490;
  --violet: #6556cf;
  --violet-deep: #4f42b6;
  --violet-line: rgba(101, 86, 207, .28);
  --line: rgba(52, 43, 57, .14);
  --line-soft: rgba(52, 43, 57, .08);
  --night: #1f1e25;
  --serif: "Songti SC", "STSong", "SimSun", "Noto Serif SC", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --content: min(1280px, calc(100vw - 64px));
}

* { box-sizing: border-box; }
html { min-width: 320px; scroll-behavior: smooth; background: var(--paper); }
body { min-width: 320px; margin: 0; overflow-x: hidden; color: var(--ink); background: var(--paper); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible { outline: 3px solid rgba(101, 86, 207, .48); outline-offset: 3px; }

.pitch-progress { position: fixed; inset: 0 auto auto 0; z-index: 100; width: 0; height: 3px; background: var(--violet); transition: width .14s linear; }
.pitch-topbar { position: sticky; top: 0; z-index: 80; display: flex; align-items: center; justify-content: space-between; width: 100%; min-height: 74px; padding: 13px max(32px, calc((100vw - 1280px) / 2)); border-bottom: 1px solid var(--line-soft); background: rgba(251, 248, 241, .93); backdrop-filter: blur(16px); }
.pitch-brand { display: grid; gap: 3px; min-width: 0; }
.pitch-brand strong { font-family: var(--serif); font-size: 19px; font-weight: 700; letter-spacing: .04em; }
.pitch-brand span { color: var(--ink-faint); font-size: 10px; letter-spacing: .12em; }
.pitch-nav { display: flex; align-items: center; gap: 18px; }
.pitch-nav a { min-height: 38px; padding: 9px 2px; color: var(--ink-soft); font-size: 12px; transition: color .2s ease; }
.pitch-nav a:hover, .pitch-nav a.is-current { color: var(--violet-deep); }
.pitch-nav .pitch-nav-demo { margin-left: 7px; padding: 9px 14px; border: 1px solid var(--violet); border-radius: 8px; color: #fff; background: var(--violet); }
.pitch-nav .pitch-nav-demo:hover { color: #fff; background: var(--violet-deep); }

.section-shell { width: var(--content); margin: 0 auto; }
.pitch-hero { display: grid; grid-template-columns: minmax(580px, .95fr) minmax(0, 1.05fr); width: var(--content); min-height: 650px; margin: 0 auto; padding: 58px 0 28px; }
.pitch-hero-copy { align-self: center; max-width: 620px; padding: 32px 0 62px; }
.pitch-overline, .section-index { margin: 0; color: var(--violet-deep); font-size: 11px; font-weight: 700; letter-spacing: .12em; }
.pitch-hero h1 { max-width: 620px; margin: 18px 0 0; font-family: var(--serif); font-size: clamp(47px, 4vw, 60px); font-weight: 600; letter-spacing: -.06em; line-height: 1.2; }
.mobile-break { display: none; }
.mobile-line-break { display: none; }
.pitch-hero h1 span { color: var(--violet); }
.pitch-lead { max-width: 470px; margin: 25px 0 0; color: var(--ink-soft); font-size: 15px; line-height: 1.9; }
.pitch-actions { display: flex; flex-wrap: wrap; gap: 11px; margin-top: 28px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 11px 22px; border: 1px solid transparent; border-radius: 8px; font-size: 14px; font-weight: 700; transition: transform .2s ease, background .2s ease, border-color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--violet); box-shadow: 0 11px 22px rgba(81, 66, 182, .2); }
.button-primary:hover { background: var(--violet-deep); }
.button-secondary { border-color: var(--violet-line); color: var(--violet-deep); background: rgba(255, 255, 255, .48); }
.button-secondary:hover { border-color: var(--violet); background: var(--paper-strong); }
.pitch-microcopy { margin: 15px 0 0; color: var(--ink-faint); font-size: 11px; }
.pitch-hero-art { position: relative; align-self: stretch; min-height: 550px; }
.pitch-hero-art > img { position: absolute; top: 3px; left: 35%; display: block; width: min(555px, 47vw); max-height: 600px; object-fit: contain; object-position: center; transform: translateX(-50%); filter: drop-shadow(0 22px 28px rgba(70, 57, 37, .12)); }
.hero-annotations { position: absolute; top: 105px; right: 0; display: grid; gap: 20px; width: min(188px, 18vw); margin: 0; padding: 0; list-style: none; }
.hero-annotations li { position: relative; padding-left: 15px; border-left: 1px solid var(--violet-line); }
.hero-annotations li::before { position: absolute; top: 4px; left: -4px; width: 7px; height: 7px; border-radius: 50%; background: var(--violet); content: ""; }
.hero-annotations strong { display: block; color: var(--violet-deep); font-size: 12px; line-height: 1.35; }
.hero-annotations span { display: block; margin-top: 5px; color: var(--ink-faint); font-size: 10px; line-height: 1.55; }

.thesis-section { padding: 104px 0 92px; border-top: 1px solid var(--line); }
.section-intro h2, .engine-heading h2, .proof-heading h2, .business-heading h2, .flywheel-copy h2, .roadmap-heading h2, .closing-inner h2, .band-heading h2, .rule-inner h2 { margin: 15px 0 0; font-family: var(--serif); font-weight: 600; letter-spacing: -.04em; line-height: 1.3; }
.section-intro h2 { max-width: 730px; font-size: clamp(34px, 3.3vw, 50px); }
.thesis-points { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-top: 54px; border-top: 1px solid var(--line); }
.thesis-points article { min-height: 128px; padding: 25px 28px 6px 0; border-right: 1px solid var(--line); }
.thesis-points article + article { padding-left: 28px; }
.thesis-points article:last-child { border-right: 0; }
.thesis-points strong { display: block; color: var(--violet-deep); font-family: var(--serif); font-size: 19px; }
.thesis-points p { max-width: 290px; margin: 13px 0 0; color: var(--ink-soft); font-size: 13px; line-height: 1.8; }

.pipeline-band { padding: 78px 0 74px; border-block: 1px solid rgba(101, 86, 207, .12); background: var(--paper-violet); }
.band-heading { display: flex; align-items: end; justify-content: space-between; gap: 40px; }
.band-heading h2 { font-size: clamp(30px, 2.7vw, 40px); }
.pipeline-narrative { max-width: 385px; margin: 0; color: var(--ink-soft); font-size: 13px; line-height: 1.75; }
.pipeline-rail { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 45px; border-top: 1px solid var(--violet-line); border-bottom: 1px solid var(--violet-line); }
.pipeline-step { position: relative; min-height: 154px; padding: 22px 24px 21px 0; border: 0; border-right: 1px solid var(--violet-line); color: var(--ink); background: transparent; text-align: left; cursor: pointer; transition: background .2s ease, padding .2s ease; }
.pipeline-step + .pipeline-step { padding-left: 24px; }
.pipeline-step:last-child { border-right: 0; }
.pipeline-step:hover, .pipeline-step.is-active { background: rgba(255,255,255,.42); }
.pipeline-step.is-active::after { position: absolute; right: 20px; bottom: 18px; color: var(--violet); content: "↗"; }
.pipeline-step b { display: block; color: var(--violet); font-size: 13px; }
.pipeline-step span { display: block; margin-top: 17px; font-family: var(--serif); font-size: 20px; }
.pipeline-step small { display: block; margin-top: 6px; color: var(--ink-faint); font-size: 11px; }

.engine-section { padding: 106px 0 112px; }
.engine-heading { max-width: 600px; }
.engine-heading h2 { font-size: clamp(34px, 3.3vw, 50px); }
.engine-heading > p:last-child { max-width: 500px; margin: 20px 0 0; color: var(--ink-soft); font-size: 14px; line-height: 1.85; }
.engine-layout { display: grid; grid-template-columns: 220px minmax(320px, 1fr) 265px; align-items: center; gap: 22px; min-height: 455px; margin-top: 35px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.engine-tabs { display: grid; align-content: center; gap: 2px; }
.engine-tab { min-height: 47px; padding: 10px 13px 10px 0; border: 0; border-bottom: 1px solid var(--line-soft); color: var(--ink-soft); background: transparent; font-size: 14px; text-align: left; cursor: pointer; }
.engine-tab:hover, .engine-tab.is-active { color: var(--violet-deep); }
.engine-tab.is-active { font-weight: 700; }
.engine-core { display: grid; place-items: center; min-height: 420px; }
.engine-core img { display: block; width: min(100%, 460px); height: auto; mix-blend-mode: multiply; }
.engine-panels { min-height: 160px; }
.engine-panel h3 { margin: 0; color: var(--violet-deep); font-family: var(--serif); font-size: 24px; font-weight: 600; line-height: 1.4; }
.engine-panel p { margin: 16px 0 0; color: var(--ink-soft); font-size: 13px; line-height: 1.8; }
.engine-panel ul { display: grid; gap: 8px; margin: 16px 0 0; padding: 0; list-style: none; color: var(--ink-faint); font-size: 11px; }
.engine-panel li { display: flex; gap: 7px; align-items: center; }
.engine-panel li::before { width: 5px; height: 5px; border-radius: 50%; background: var(--violet); content: ""; }

.rule-band { position: relative; overflow: hidden; color: #f9f7fc; background: var(--night); }
.rule-band::after { position: absolute; top: -36px; right: 7%; width: 370px; height: 370px; border: 1px solid rgba(224,218,255,.26); border-radius: 50%; box-shadow: 0 0 0 38px rgba(224,218,255,.025), 0 0 0 77px rgba(224,218,255,.02); content: ""; }
.rule-inner { position: relative; z-index: 1; display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; padding: 82px 0; }
.rule-inner .section-index { color: #c7bfff; }
.rule-inner h2 { font-size: clamp(34px, 3.3vw, 49px); }
.rule-inner > p { max-width: 570px; align-self: center; margin: 0; color: rgba(249,247,252,.75); font-size: 15px; line-height: 2; }

.proof-section { padding: 107px 0 105px; }
.proof-heading { display: flex; align-items: end; justify-content: space-between; gap: 36px; }
.proof-heading h2 { font-size: clamp(34px, 3.3vw, 49px); }
.proof-boundary { max-width: 265px; margin: 0 0 6px; color: var(--violet-deep); font-size: 13px; font-weight: 700; line-height: 1.65; }
.proof-boundary span { color: var(--ink-faint); font-size: 10px; font-weight: 400; }
.world-film { overflow: hidden; margin-top: 38px; border: 1px solid var(--line); background: var(--paper-strong); }
.world-film img { display: block; width: 100%; height: auto; aspect-ratio: 5 / 1; object-fit: cover; }
.proof-caption { display: flex; align-items: start; justify-content: space-between; gap: 40px; padding-top: 18px; border-top: 1px solid var(--line); }
.proof-caption p { max-width: 650px; margin: 0; color: var(--ink-soft); font-size: 13px; line-height: 1.85; }
.proof-caption a { color: var(--violet-deep); font-size: 13px; font-weight: 700; white-space: nowrap; }

.business-section { padding: 105px 0 103px; border-top: 1px solid var(--line); }
.business-heading { display: grid; grid-template-columns: .9fr .7fr; gap: 80px; }
.business-heading h2 { font-size: clamp(34px, 3.3vw, 49px); }
.business-heading > p:last-child { align-self: end; margin: 0 0 6px; color: var(--ink-soft); font-size: 13px; line-height: 1.85; }
.business-rail { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; margin: 52px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--violet-line); }
.business-rail li { min-height: 202px; padding: 22px 18px 10px 0; border-right: 1px solid var(--line); }
.business-rail li + li { padding-left: 18px; }
.business-rail li:last-child { border-right: 0; }
.business-rail b { display: block; color: var(--violet); font-size: 12px; }
.business-rail strong { display: block; margin-top: 28px; font-family: var(--serif); font-size: 18px; font-weight: 600; line-height: 1.4; }
.business-rail span { display: block; margin-top: 11px; color: var(--ink-faint); font-size: 11px; line-height: 1.7; }

.flywheel-section { padding: 109px 0; background: var(--paper-violet); }
.flywheel-layout { display: grid; grid-template-columns: .74fr 1.26fr; align-items: center; gap: 80px; }
.flywheel-copy h2 { font-size: clamp(34px, 3.3vw, 49px); }
.flywheel-copy > p:last-child { max-width: 390px; margin: 20px 0 0; color: var(--ink-soft); font-size: 14px; line-height: 1.85; }
.flywheel { position: relative; width: min(100%, 620px); aspect-ratio: 1.2 / 1; margin-inline: auto; border-radius: 50%; }
.flywheel::before, .flywheel::after { position: absolute; inset: 12% 12%; border: 1px solid var(--violet-line); border-radius: 50%; content: ""; }
.flywheel::after { inset: 24% 24%; border-color: rgba(101, 86, 207, .16); }
.flywheel-node { position: absolute; z-index: 2; width: 156px; min-height: 79px; padding: 12px; border: 1px solid var(--violet-line); border-radius: 10px; color: var(--violet-deep); background: var(--paper-strong); box-shadow: 0 10px 22px rgba(70, 58, 105, .08); font-size: 13px; font-weight: 700; line-height: 1.35; cursor: pointer; transition: transform .2s ease, color .2s ease, background .2s ease; }
.flywheel-node:hover, .flywheel-node.is-active { transform: translateY(-3px); color: #fff; background: var(--violet); }
.flywheel-node small { display: block; margin-top: 4px; color: inherit; font-size: 10px; font-weight: 400; opacity: .82; }
.node-top { top: 0; left: calc(50% - 78px); }
.node-right { top: calc(50% - 40px); right: 0; }
.node-bottom { bottom: 0; left: calc(50% - 78px); }
.node-left { top: calc(50% - 40px); left: 0; }
.flywheel-center { position: absolute; top: 50%; left: 50%; z-index: 3; display: grid; place-items: center; width: 190px; min-height: 190px; padding: 25px; border-radius: 50%; color: var(--violet-deep); background: rgba(255,255,255,.9); box-shadow: 0 14px 36px rgba(70, 58, 105, .12); text-align: center; transform: translate(-50%, -50%); }
.flywheel-center strong { font-family: var(--serif); font-size: 25px; font-weight: 600; }
.flywheel-center span { margin-top: 9px; color: var(--ink-soft); font-size: 11px; line-height: 1.6; }

.roadmap-section { padding: 107px 0 105px; }
.roadmap-heading h2 { font-size: clamp(34px, 3.3vw, 49px); }
.roadmap-rail { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 50px; border-top: 1px solid var(--line); }
.roadmap-stage { position: relative; min-height: 160px; padding: 24px 20px 10px 0; border: 0; border-right: 1px solid var(--line); color: var(--ink); background: transparent; text-align: left; cursor: pointer; }
.roadmap-stage + .roadmap-stage { padding-left: 20px; }
.roadmap-stage:last-child { border-right: 0; }
.roadmap-stage::before { position: absolute; top: -5px; left: -1px; width: 9px; height: 9px; border-radius: 50%; background: var(--ink-faint); content: ""; }
.roadmap-stage.is-active::before { width: 11px; height: 11px; top: -6px; background: var(--violet); box-shadow: 0 0 0 5px rgba(101,86,207,.14); }
.roadmap-stage b { display: block; color: var(--violet-deep); font-size: 11px; }
.roadmap-stage strong { display: block; margin-top: 12px; font-family: var(--serif); font-size: 19px; font-weight: 600; }
.roadmap-stage span { display: block; margin-top: 8px; color: var(--ink-faint); font-size: 11px; }
.roadmap-detail { max-width: 690px; margin: 8px 0 0; padding-top: 17px; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 13px; line-height: 1.8; }

.closing-section { position: relative; min-height: 477px; overflow: hidden; border-top: 1px solid var(--line); background: var(--paper); }
.closing-art { position: absolute; inset: 0; pointer-events: none; }
.closing-art::after { position: absolute; inset: 0; background: rgba(251,248,241,.44); content: ""; }
.closing-art img { width: 100%; height: 100%; object-fit: cover; object-position: center right; opacity: .66; }
.closing-inner { position: relative; z-index: 1; padding: 96px 0 72px; }
.closing-inner h2 { max-width: 650px; font-size: clamp(39px, 4vw, 58px); }
.closing-inner > p:last-of-type { max-width: 410px; margin: 20px 0 0; color: var(--ink-soft); font-size: 14px; line-height: 1.8; }
.pitch-footer { display: flex; justify-content: space-between; width: var(--content); margin: 0 auto; padding: 24px 0 32px; color: var(--ink-faint); font-size: 11px; }
.pitch-footer strong { color: var(--ink-soft); font-family: var(--serif); font-size: 13px; }

[data-reveal] { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  [data-reveal] { opacity: 1; transform: none; }
}
@media (max-width: 1080px) {
  :root { --content: min(960px, calc(100vw - 48px)); }
  .pitch-nav { gap: 12px; }
  .pitch-hero { grid-template-columns: minmax(450px, .9fr) minmax(380px, 1.1fr); }
  .pitch-hero-art > img { width: min(515px, 53vw); }
  .hero-annotations { width: 190px; }
  .engine-layout { grid-template-columns: 175px minmax(275px, 1fr) 225px; }
  .flywheel-layout, .business-heading { gap: 48px; }
}
@media (max-width: 760px) {
  :root { --content: calc(100vw - 32px); }
  .pitch-topbar { min-height: 65px; padding: 10px 16px; }
  .pitch-brand strong { font-size: 16px; }
  .pitch-brand span { font-size: 8px; }
  .pitch-nav { gap: 2px; }
  .pitch-nav a:not(.pitch-nav-demo) { display: none; }
  .pitch-nav .pitch-nav-demo { min-height: 40px; margin: 0; padding: 9px 12px; font-size: 12px; }
  .pitch-hero { display: flex; flex-direction: column; min-height: 0; padding: 37px 0 42px; }
  .pitch-hero-copy { order: 1; max-width: none; padding: 0; }
  .pitch-hero h1 { margin-top: 14px; font-size: clamp(36px, 9.9vw, 42px); }
  .mobile-break { display: inline; }
  .desktop-break { display: none; }
  .mobile-line-break { display: inline; }
  .pitch-lead { margin-top: 18px; font-size: 13px; line-height: 1.8; }
  .button { flex: 1 1 145px; min-height: 48px; padding-inline: 15px; }
  .pitch-hero-art { order: 2; min-height: 370px; margin-top: 22px; }
  .pitch-hero-art > img { top: 0; left: 50%; width: min(390px, 104vw); max-height: 420px; }
  .hero-annotations { display: none; }
  .thesis-section, .engine-section, .proof-section, .business-section, .roadmap-section { padding: 73px 0; }
  .section-intro h2, .engine-heading h2, .proof-heading h2, .business-heading h2, .flywheel-copy h2, .roadmap-heading h2, .rule-inner h2 { font-size: clamp(31px, 9vw, 41px); }
  .thesis-points { grid-template-columns: 1fr; margin-top: 35px; }
  .thesis-points article, .thesis-points article + article { min-height: 0; padding: 20px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .thesis-points article:last-child { border-bottom: 0; }
  .pipeline-band { padding: 61px 0; }
  .band-heading { display: block; }
  .band-heading h2 { font-size: clamp(31px, 8.5vw, 41px); }
  .pipeline-narrative { margin-top: 16px; }
  .pipeline-rail { grid-template-columns: 1fr 1fr; margin-top: 31px; }
  .pipeline-step { min-height: 145px; padding: 18px 15px; border-bottom: 1px solid var(--violet-line); }
  .pipeline-step + .pipeline-step { padding-left: 15px; }
  .pipeline-step:nth-child(2n) { border-right: 0; }
  .pipeline-step:nth-last-child(-n + 2) { border-bottom: 0; }
  .pipeline-step span { margin-top: 13px; font-size: 17px; }
  .engine-heading > p:last-child { font-size: 13px; }
  .engine-layout { grid-template-columns: 1fr; gap: 0; min-height: 0; padding: 23px 0 32px; }
  .engine-tabs { grid-template-columns: repeat(2, 1fr); border-bottom: 1px solid var(--line); }
  .engine-tab { min-height: 47px; padding: 10px; border-right: 1px solid var(--line-soft); font-size: 12px; }
  .engine-core { order: 3; min-height: 250px; }
  .engine-core img { width: 300px; }
  .engine-panels { order: 2; min-height: 0; padding: 27px 0 7px; }
  .engine-panel h3 { font-size: 22px; }
  .rule-inner { grid-template-columns: 1fr; gap: 26px; padding: 64px 0; }
  .rule-inner > p { font-size: 13px; }
  .proof-heading, .business-heading { display: block; }
  .proof-boundary, .business-heading > p:last-child { margin-top: 18px; }
  .world-film { margin-top: 27px; }
  .world-film img { width: auto; min-width: 100%; height: 186px; object-fit: cover; object-position: center; }
  .proof-caption { display: block; }
  .proof-caption a { display: inline-block; margin-top: 13px; }
  .business-rail { grid-template-columns: 1fr; margin-top: 33px; }
  .business-rail li, .business-rail li + li { min-height: 0; padding: 19px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .business-rail strong { margin-top: 10px; }
  .flywheel-section { padding: 73px 0; }
  .flywheel-layout { grid-template-columns: 1fr; gap: 36px; }
  .flywheel { width: min(100%, 480px); min-width: 300px; }
  .flywheel-node { width: 118px; min-height: 66px; padding: 9px; font-size: 11px; }
  .node-top, .node-bottom { left: calc(50% - 59px); }
  .node-right { right: -4px; }
  .node-left { left: -4px; }
  .flywheel-center { width: 145px; min-height: 145px; padding: 15px; }
  .flywheel-center strong { font-size: 20px; }
  .flywheel-center span { font-size: 9px; }
  .roadmap-rail { grid-template-columns: 1fr 1fr; margin-top: 36px; }
  .roadmap-stage, .roadmap-stage + .roadmap-stage { min-height: 143px; padding: 20px 14px; border-bottom: 1px solid var(--line); }
  .roadmap-stage:nth-child(2n) { border-right: 0; }
  .roadmap-stage:nth-last-child(-n + 2) { border-bottom: 0; }
  .roadmap-stage strong { font-size: 16px; }
  .closing-section { min-height: 460px; }
  .closing-art img { object-position: 63% center; }
  .closing-inner { padding: 73px 0; }
  .closing-inner h2 { font-size: clamp(38px, 10.5vw, 49px); }
  .pitch-footer { display: grid; gap: 8px; padding: 21px 0 28px; }
}