/* Dóny 2B · #5498 · 2026-11-15.
 * Reference lock: Slash — графит/стекло/серебро; Atlas — масштаб/воздух;
 * Vercel — тонкие кромки и короткие реакции. Шрифты и копирайт Dóny.
 * Золото только на акуте. Browser QA, .fig и production — Root.
 * Движется иллюстрация, не текст/CTA. Без JS — статичная видимая страница.
 */

:root {
  --ink: #121110;
  --graphite: #1b1a18;
  --bone: #e9e5dc;
  --mist: #9c978d;
  --ash: #9c978d;
  /* Локальный Dóny 2B: только навигация и тонкие технические связи. */
  --b2b-tech: #a6c5d6;
  --b2b-tech-line: rgba(166, 197, 214, .38);
  --bg: var(--ink);
  --surface: var(--graphite);
  --text: var(--bone);
  --muted: var(--mist);
  --accent: #e9e5dc;
  --action: var(--text);
  --hairline: rgba(233, 229, 220, .16);
  --hairline-strong: rgba(233, 229, 220, .34);
  --wash: rgba(233, 229, 220, .045);
  --display: "Dony Display", Georgia, "Times New Roman", serif;
  --ui: "Dony Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --gap-md: 32px;
  --gap-lg: 56px;
  --gap-xl: 120px;
  --dur-intro: 800ms;
  --dur-reveal: 420ms;
  --ease-out: cubic-bezier(.22, 1, .36, 1);
  --rim: rgba(233, 229, 220, .12);
  --material: linear-gradient(150deg, rgba(233, 229, 220, .045), transparent 55%);
  --elevation: 0 16px 48px rgba(0, 0, 0, .12);
  --dur-control: 180ms;
  --logo-acute: #c9a15a;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --ink: #f3eee5;
    --graphite: #ffffff;
    --bone: #1f1b16;
    --mist: #6f665a;
    --ash: #6f665a;
    --b2b-tech: #3b667b;
    --b2b-tech-line: rgba(59, 102, 123, .34);
    --accent: #1f1b16;
    --hairline: rgba(31, 27, 22, .16);
    --hairline-strong: rgba(31, 27, 22, .34);
    --wash: rgba(31, 27, 22, .035);
    --rim: rgba(255, 255, 255, .95);
    --material: linear-gradient(150deg, rgba(255, 255, 255, .8), transparent 65%);
    --elevation: 0 16px 48px rgba(31, 27, 22, .045);
    color-scheme: light;
  }
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 104px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--ui);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, p, figure { margin: 0; }
h1, h2, h3 { overflow-wrap: anywhere; }
p, li, figcaption, .signal-flow, .cap { overflow-wrap: anywhere; }
a { color: inherit; text-underline-offset: .2em; }
button, select { font: inherit; }
img, svg { max-width: 100%; }
img { display: block; height: auto; }
::selection { background: var(--text); color: var(--bg); }
:where(a, button, summary, select, [tabindex]):focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 3px;
}
:where(section, div, h1, h2)[id] { scroll-margin-top: 104px; }
.wrap { width: 100%; max-width: 1280px; margin-inline: auto; padding-inline: 32px; }
.wrap > *, .hero > *, .cards > *, .steps > *, .product-story > * { min-width: 0; }
.skip {
  position: absolute;
  inset: 8px auto auto 16px;
  z-index: 100;
  padding: 12px 18px;
  background: var(--text);
  color: var(--bg);
  transform: translateY(-200%);
}
.skip:focus { transform: none; }

/* Собственная палитра тёмной сцены не наследует светлые алиасы страницы. */
.topbar, .hero {
  --scene-bg: #121110;
  --scene-surface: #1b1a18;
  --scene-text: #e9e5dc;
  --scene-muted: #9c978d;
  --b2b-tech: #a6c5d6;
  --b2b-tech-line: rgba(166, 197, 214, .38);
  --scene-line: rgba(233, 229, 220, .22);
  --scene-line-strong: rgba(233, 229, 220, .44);
  --scene-glass: rgba(18, 17, 16, .88);
  --scene-pad: 32px;
  --text: var(--scene-text);
  --muted: var(--scene-muted);
  --bg: var(--scene-bg);
  --surface: var(--scene-surface);
  --hairline: var(--scene-line);
  --hairline-strong: var(--scene-line-strong);
  width: calc(100% + 64px);
  margin-inline: -32px;
  color: var(--scene-text);
  background: var(--scene-bg);
  color-scheme: dark;
}

/* cqi учитывает полосу прокрутки; без поддержки fallback не выходит за wrap. */
@supports (width: 100cqi) {
  body { container-type: inline-size; }
  .topbar, .hero {
    --scene-pad: max(32px, calc((100cqi - 1216px) / 2));
    width: 100cqi;
    margin-inline: calc(50% - 50cqi);
  }
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 88px;
  padding: 18px var(--scene-pad);
  border-bottom: 1px solid var(--scene-line);
}
.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
  color: inherit;
  font-family: var(--display);
  font-size: 24px;
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
}
.brand svg { display: block; flex-shrink: 0; }
.brand .b2b { margin-left: 5px; font-family: var(--ui); font-size: 13px; font-weight: 400; color: inherit; }
.brand svg path[fill="#c9a15a"], .brand .mark-acute { fill: var(--logo-acute); }
.nav { display: flex; align-items: center; gap: 24px; font-size: 14px; line-height: 1.35; }
.nav a { text-decoration: none; }
.nav a:not(.btn) { color: var(--scene-muted); }
.nav a:not(.btn):hover, .nav a[aria-current="true"] { color: var(--scene-text); text-decoration: underline; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  min-height: 48px;
  max-width: 100%;
  padding: 12px 24px;
  border: 1px solid var(--hairline-strong);
  border-radius: 4px;
  background: transparent;
  color: var(--text);
  font: 500 15px / 1.4 var(--ui);
  text-align: center;
  text-decoration: none;
  overflow-wrap: anywhere;
  transition: background-color var(--dur-control) ease, border-color var(--dur-control) ease, opacity var(--dur-control) ease;
}
.btn svg { width: 14px; height: 14px; flex-shrink: 0; }
.btn--primary { background: var(--text); color: var(--bg); border-color: var(--text); }
.btn--primary:hover { opacity: .86; }
.btn--ghost:hover { background: var(--wash, rgba(233, 229, 220, .06)); border-color: currentColor; }
.btn:active { opacity: .75; }
.topbar .btn { min-height: 44px; padding: 10px 18px; }

/* SpaceX: сцена занимает весь кадр; копирайт остаётся самостоятельным слоем. */
.hero {
  position: relative;
  isolation: isolate;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 750px;
  min-height: clamp(750px, calc(100svh - 88px), 880px);
  padding: 100px var(--scene-pad) 132px;
}
.hero__scene {
  position: absolute;
  inset: 0;
  z-index: -2;
  margin: 0;
  background: var(--scene-bg);
}
.hero__scene img { width: 100%; height: 100%; object-fit: cover; object-position: center; filter: none; }
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(90deg, rgba(18, 17, 16, .94) 0%, rgba(18, 17, 16, .8) 28%, rgba(18, 17, 16, .38) 52%, rgba(18, 17, 16, 0) 78%);
}
.hero__copy { order: 1; position: relative; width: 100%; max-width: 650px; }
.hero__eyebrow, .hero .kicker { margin-bottom: 28px; color: var(--scene-muted); font-size: 13px; line-height: 1.5; letter-spacing: .12em; }
.hero h1 { margin-bottom: 28px; color: var(--scene-text); font-family: var(--display); font-size: 84px; font-weight: 400; line-height: 1.04; letter-spacing: -.025em; }
.hero h1 em { font-style: normal; color: inherit; }
.hero .lede { max-width: 510px; margin-bottom: 32px; color: var(--scene-text); font-size: 19px; line-height: 1.65; }
.hero .cta { display: flex; flex-wrap: wrap; gap: 12px; }
.hero .note { margin-top: 24px; color: var(--scene-muted); font-size: 13px; line-height: 1.7; }
.hero__signal {
  position: absolute;
  right: var(--scene-pad);
  bottom: 132px;
  order: 3;
  width: 328px;
  padding: 22px 24px;
  border: 1px solid var(--scene-line);
  border-radius: 8px;
  background: var(--scene-glass);
  color: var(--scene-text);
}
.signal-label { display: block; margin-bottom: 14px; color: var(--scene-muted); font-size: 12px; line-height: 1.5; letter-spacing: .1em; }
.signal-question { margin-bottom: 20px; font-size: 17px; line-height: 1.5; }
.signal-flow { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 16px; color: var(--scene-muted); font-size: 12px; }
.signal-result { padding-top: 14px; border-top: 1px solid var(--scene-line); font-size: 13px; line-height: 1.6; }
.hero__rail { position: absolute; inset: auto var(--scene-pad) 32px; display: flex; flex-wrap: wrap; gap: 16px 32px; order: 4; padding-top: 20px; border-top: 1px solid var(--scene-line); color: var(--scene-muted); font-size: 12px; line-height: 1.6; }
.hero__rail span { min-width: 0; overflow-wrap: anywhere; }

/* Последующие главы: исходные классы сохранены, все состояния нейтральны. */
section { padding: var(--gap-xl) 0; }
section + section { border-top: 1px solid var(--hairline); }
h2 { max-width: 900px; margin-bottom: 24px; font-family: var(--display); font-size: clamp(32px, 3.8vw, 48px); font-weight: 400; line-height: 1.15; letter-spacing: -.02em; text-wrap: balance; }
h3 { font-size: 21px; font-weight: 500; line-height: 1.35; }
.section-lede { max-width: 700px; margin-bottom: 48px; color: var(--muted); font-size: 18px; line-height: 1.7; }
.section-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; margin-bottom: 48px; }
.section-intro .section-lede { margin-bottom: 0; }
.chapter { display: block; margin-bottom: 20px; color: var(--muted); font-size: 12px; line-height: 1.5; letter-spacing: .16em; text-transform: uppercase; }
.chapter b { color: var(--text); font-weight: 500; }
.cards, .examples-grid, .privacy-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); gap: 20px; }
.card { min-width: 0; padding: 28px; border: 1px solid var(--hairline); border-radius: 8px; background: var(--surface); }
.card h3 { margin-bottom: 16px; }
.card p { margin-bottom: 20px; color: var(--muted); font-size: 16px; }
.card .prompt, .example .prompt { padding-left: 16px; border-left: 1px solid var(--hairline-strong); color: var(--text); font-size: 14px; line-height: 1.65; }
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: 20px; counter-reset: step; }
.step { min-width: 0; padding: 28px 0; border-top: 1px solid var(--hairline-strong); }
.step::before { counter-increment: step; content: counter(step, decimal-leading-zero); display: block; margin-bottom: 24px; color: var(--muted); font-size: 13px; }
.step h3 { margin-bottom: 14px; font-family: var(--ui); font-size: 18px; }
.step p { color: var(--muted); font-size: 16px; }
.boundary { margin-top: 32px; padding: 20px 24px; border-left: 2px solid var(--hairline-strong); color: var(--muted); font-size: 14px; }
.proof { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 48px; padding: 0; }
.proof .item { min-width: 0; padding-top: 24px; border-top: 1px solid var(--hairline-strong); }
.proof .num { display: block; color: var(--text); font-family: var(--display); font-size: 64px; font-weight: 400; line-height: 1.1; }
.proof .cap { max-width: 300px; margin-top: 20px; color: var(--muted); font-size: 15px; line-height: 1.65; }
.figure, .hero__art { margin: 40px 0; padding: 24px; border: 1px solid var(--hairline); border-radius: 8px; background: var(--surface); }
.figure img, .hero__art img { width: 100%; filter: grayscale(1); background: #1b1a18; }
.figure figcaption, .hero__art figcaption { margin-top: 20px; color: var(--muted); font-size: 13px; line-height: 1.65; }
.case-rim { display: none; }
.example { display: flex; flex-direction: column; }
.example img { width: 100%; margin-bottom: 24px; border-radius: 4px; background: #1b1a18; filter: grayscale(1); }
.example h3 { margin-bottom: 18px; }
.example .prompt { margin-bottom: 20px; }
.example ul, .privacy-grid .card ul { margin: 0 0 24px; padding: 0; list-style: none; }
.example li, .privacy-grid .card li { position: relative; padding: 6px 0 6px 18px; color: var(--muted); font-size: 15px; }
.example li::before, .privacy-grid .card li::before { content: "—"; position: absolute; left: 0; color: var(--muted); }
.example .conf { align-self: flex-start; margin-top: auto; padding: 5px 10px; border: 1px solid var(--hairline-strong); border-radius: 4px; color: var(--muted); font-size: 12px; }
.demo-teaser { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.demo-frame { min-width: 0; padding: 28px; border: 1px solid var(--hairline-strong); border-radius: 8px; background: var(--surface); font-size: 15px; }
.demo-frame .tag { display: inline-block; margin-bottom: 24px; padding: 4px 10px; border: 1px solid var(--hairline); border-radius: 4px; color: var(--muted); font-size: 12px; letter-spacing: .06em; }
.demo-frame .msg { margin-bottom: 12px; padding: 16px; border: 1px solid var(--hairline); border-radius: 4px; color: var(--muted); }
.demo-frame .msg:last-child { margin-bottom: 0; }
.demo-frame .msg.user { background: var(--wash); color: var(--text); }
.demo-frame .msg.agent b, .msg .metric { color: var(--text); font-weight: 500; }
.product-story { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border: 1px solid var(--hairline-strong); border-radius: 8px; background: var(--surface); }
.product-story > * { padding: 32px; }
.product-story > * + * { border-left: 1px solid var(--hairline); }
.product-story h3 { margin-bottom: 18px; }
.product-story p { color: var(--muted); font-size: 16px; }
.icp { display: flex; flex-wrap: wrap; gap: 12px; }
.icp span { max-width: 100%; padding: 8px 16px; border: 1px solid var(--hairline-strong); border-radius: 4px; color: var(--muted); font-size: 14px; overflow-wrap: anywhere; }
details { border-bottom: 1px solid var(--hairline); padding: 24px 0; }
summary { display: flex; justify-content: space-between; align-items: baseline; gap: 24px; min-height: 44px; padding-block: 8px; color: var(--text); font-size: 18px; font-weight: 500; list-style: none; cursor: pointer; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; flex-shrink: 0; color: var(--muted); font-family: var(--ui); font-size: 24px; line-height: 1; }
details[open] summary::after { content: "−"; }
details p { max-width: 780px; margin-top: 16px; color: var(--muted); font-size: 16px; }
.final, .horizon { padding: 104px 32px; border-top: 1px solid var(--hairline-strong); background: var(--surface); text-align: center; }
.final h2, .horizon h2 { max-width: 900px; margin: 0 auto 24px; font-size: clamp(36px, 5vw, 64px); }
.final p, .horizon p { max-width: 600px; margin: 0 auto 32px; color: var(--muted); }
footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 20px 32px; padding: 40px 0; border-top: 1px solid var(--hairline); color: var(--muted); font-size: 13px; }
footer > * { min-width: 0; overflow-wrap: anywhere; }
footer a { text-decoration: none; }
footer a:hover { color: var(--text); text-decoration: underline; }
.speed { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 8px; color: var(--muted); font-size: 14px; }
.speed select { min-height: 44px; max-width: 100%; padding: 8px 12px; border: 1px solid var(--hairline-strong); border-radius: 4px; background: var(--surface); color: var(--text); }

/* Материал и архитектура: нейтральные отражения вместо цветных акцентов. */
.topbar { background: rgba(18, 17, 16, .94); box-shadow: inset 0 1px 0 rgba(255, 255, 255, .06), 0 8px 32px rgba(0, 0, 0, .08); }
@supports (backdrop-filter: blur(20px)) {
  .topbar { background: rgba(18, 17, 16, .76); backdrop-filter: blur(20px); }
}
.nav a:not(.btn) { transition: color var(--dur-control) ease; }
.nav a:not(.btn):hover, .nav a[aria-current="true"] { color: var(--b2b-tech); text-decoration-color: var(--b2b-tech-line); }
.signal-flow > span[aria-hidden="true"] { color: var(--b2b-tech); }
.btn { border-radius: 6px; transition: background-color var(--dur-control) ease, border-color var(--dur-control) ease, opacity var(--dur-control) ease, box-shadow var(--dur-control) ease; }
.btn--primary:hover { opacity: .9; box-shadow: 0 4px 24px rgba(233, 229, 220, .16); }
.hero { min-height: 800px; min-height: clamp(800px, calc(100svh - 88px), 940px); padding-block: 112px 144px; }
.hero h1 { font-size: clamp(72px, 6.9vw, 92px); line-height: 1.03; letter-spacing: -.035em; margin-bottom: 32px; }
.hero .lede { max-width: 480px; line-height: 1.7; margin-bottom: 36px; }
.hero__scene { overflow: hidden; }
.hero__parallax, .hero__drift { width: 100%; height: 100%; }
.hero__parallax { transform: translate3d(var(--scene-x, 0px), var(--scene-y, 0px), 0); transition: transform 200ms ease-out; }
.hero__drift { transform: scale(1.035); }
.hero__light { position: absolute; inset: -4%; pointer-events: none; opacity: .32; background: radial-gradient(ellipse at 77% 36%, rgba(233, 229, 220, .24), transparent 45%), linear-gradient(115deg, transparent 48%, rgba(233, 229, 220, .09) 58%, transparent 67%); }
.hero__signal { padding: 26px 28px; border-radius: 12px; background: linear-gradient(135deg, rgba(255, 255, 255, .065), transparent 65%), var(--scene-glass); box-shadow: inset 0 1px 0 rgba(255, 255, 255, .1), 0 24px 64px rgba(0, 0, 0, .2); }
.motion-toggle {
  position: absolute; top: 28px; right: var(--scene-pad); z-index: 2;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 44px; max-width: calc(100% - 48px); padding: 10px 14px;
  border: 1px solid var(--scene-line); border-radius: 24px;
  background: rgba(18, 17, 16, .88); color: var(--scene-muted);
  font: 400 12px / 1.5 var(--ui); cursor: pointer;
  transition: color var(--dur-control) ease, border-color var(--dur-control) ease, background-color var(--dur-control) ease;
}
.motion-toggle svg { flex: 0 0 14px; }
.motion-toggle:hover, .motion-toggle:focus-visible { color: var(--scene-text); border-color: var(--scene-line-strong); }
.motion-toggle:disabled { cursor: default; }
.motion-toggle__pause, .motion-toggle[aria-pressed="true"] .motion-toggle__play { display: none; }
.motion-toggle[aria-pressed="true"] .motion-toggle__pause { display: block; }
h2 { font-size: clamp(34px, 4.1vw, 54px); line-height: 1.12; letter-spacing: -.025em; margin-bottom: 28px; }
.chapter { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; font-size: 11px; }
.chapter b { padding: 6px 9px; border: 1px solid var(--hairline); border-radius: 5px; background: var(--wash); letter-spacing: .04em; }
.chapter::after { content: ""; width: 56px; height: 1px; margin-left: 4px; background: var(--b2b-tech-line); }
.card { padding: 32px; border-radius: 12px; background: var(--material), var(--surface); box-shadow: inset 0 1px 0 var(--rim); transition: border-color var(--dur-control) ease, box-shadow var(--dur-control) ease; }
.card:focus-within { border-color: var(--hairline-strong); box-shadow: inset 0 1px 0 var(--rim), var(--elevation); }
@media (hover: hover) and (pointer: fine) {
  .card:hover { border-color: var(--hairline-strong); box-shadow: inset 0 1px 0 var(--rim), var(--elevation); }
}
.figure { margin-block: 48px; padding: 28px; border-radius: 12px; background: var(--material), var(--surface); box-shadow: inset 0 1px 0 var(--rim); }
.demo-frame { padding: 32px; border-radius: 14px; background: var(--material), var(--surface); box-shadow: inset 0 1px 0 var(--rim), var(--elevation); }
summary { transition: color var(--dur-control) ease; }
summary:hover, summary:focus-visible { color: var(--text); }
.horizon { margin-bottom: 40px; padding: 112px 40px; border: 1px solid var(--hairline-strong); border-radius: 20px; background: radial-gradient(ellipse at 50% 0%, var(--wash), transparent 65%), var(--material), var(--surface); box-shadow: inset 0 1px 0 var(--rim); }

/* Без JS контент и сцена видны. Вступает только иллюстрация, не copy/CTA. */
.reveal, .js .reveal, .chart-reveal { opacity: 1; transform: none; }
@media (prefers-reduced-motion: no-preference) {
  .js .hero[data-motion] { --motion-play: paused; }
  .js .hero[data-motion="running"] { --motion-play: running; }
  .js .hero[data-motion] .hero__scene img { animation: scene-intro var(--dur-intro) var(--ease-out) both; animation-play-state: var(--motion-play); }
  .js .hero[data-motion] .hero__drift { animation: object-drift 28s ease-in-out infinite alternate; animation-play-state: var(--motion-play); }
  .js .hero[data-motion] .hero__light { animation: silver-light 22s ease-in-out infinite alternate; animation-play-state: var(--motion-play); }
  .js .hero[data-motion="off"] .hero__scene img,
  .js .hero[data-motion="off"] .hero__drift,
  .js .hero[data-motion="off"] .hero__light { animation: none; }
  .js .hero:not([data-motion="running"]) .hero__parallax { transform: none; transition: none; }
  .js .reveal.in { animation: chapter-intro var(--dur-reveal) var(--ease-out) both; }
}
@keyframes scene-intro { from { opacity: .65; } to { opacity: 1; } }
@keyframes object-drift { from { transform: translate3d(-.35%, .2%, 0) scale(1.035); } to { transform: translate3d(.35%, -.3%, 0) scale(1.05); } }
@keyframes silver-light { from { opacity: .2; transform: translate3d(-2%, 0, 0); } to { opacity: .55; transform: translate3d(2%, 1%, 0); } }
@keyframes chapter-intro { from { opacity: .72; } to { opacity: 1; } }

@media (max-width: 1100px) {
  .nav a:not(.btn) { display: none; }
  .hero__copy { max-width: 560px; }
  .hero h1 { font-size: 72px; }
  .hero__signal { width: 280px; padding: 20px; }
}

@media (max-width: 1000px) {
  :root { --gap-xl: 80px; }
  .hero { display: flex; justify-content: flex-start; gap: 0; min-height: 0; padding: 64px 0 0; }
  .hero::before { display: none; }
  .hero__copy { order: 1; max-width: none; padding-inline: 32px; }
  .hero h1 { max-width: 650px; font-size: 48px; line-height: 1.04; letter-spacing: -.02em; }
  .hero .lede { max-width: 560px; font-size: 18px; }
  .hero__eyebrow { font-size: 12px; letter-spacing: .08em; }
  .hero .cta { gap: 12px; }
  .hero .btn { min-height: 44px; padding: 12px 20px; }
  .hero__scene { position: relative; inset: auto; z-index: auto; order: 2; width: 100%; height: 300px; margin-top: 32px; }
  .hero__scene img { object-fit: contain; object-position: center; }
  .motion-toggle { position: relative; inset: auto; order: 2; align-self: flex-end; margin: -60px 32px 28px; }
  .hero__signal { position: relative; inset: auto; order: 3; width: auto; margin: 0 32px 32px; padding: 24px; }
  .hero__rail { position: relative; inset: auto; order: 4; margin: 0 32px; padding: 24px 0 32px; gap: 16px 24px; }
  section { padding: var(--gap-xl) 0; }
  .section-intro, .demo-teaser { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .section-intro { margin-bottom: 32px; }
  .section-lede { margin-bottom: 32px; font-size: 17px; }
  .proof { gap: 24px; }
  .proof .num { font-size: 48px; }
  .product-story { grid-template-columns: minmax(0, 1fr); }
  .product-story > * + * { border-left: 0; border-top: 1px solid var(--hairline); }
  .final, .horizon { padding: 64px 24px; }
}

@media (max-width: 600px) {
  :root { --gap-xl: 64px; }
  .hero { padding-top: 40px; }
  .hero__copy { padding-inline: 24px; }
  .hero__eyebrow { margin-bottom: 20px; }
  .hero h1 { font-size: clamp(38px, 10.8vw, 44px); line-height: 1.06; margin-bottom: 24px; }
  .hero .lede { font-size: 17px; line-height: 1.55; margin-bottom: 24px; }
  .hero .btn { gap: 12px; padding-inline: 14px; font-size: 14px; }
  .hero .note { margin-top: 18px; line-height: 1.55; }
  .hero__scene { height: 260px; margin-top: 24px; }
  .motion-toggle { margin-right: 24px; }
  .chapter { gap: 8px; letter-spacing: .12em; }
  .chapter::after { width: 32px; }
  .topbar { gap: 12px; min-height: 80px; padding-block: 16px; }
  .topbar .btn { padding-inline: 12px; font-size: 13px; }
  .brand { gap: 7px; font-size: 22px; }
  .brand svg { width: 23px; height: 23px; }
  .brand .b2b { margin-left: 3px; font-size: 11px; }
  .proof { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .proof .cap { max-width: 100%; }
  .card, .demo-frame, .product-story > * { padding: 24px; }
  .figure, .hero__art { padding: 16px; }
  .boundary { padding: 16px; }
  summary { font-size: 17px; }
}

@media (max-width: 360px) {
  .topbar { flex-wrap: wrap; }
  .topbar .nav { margin-left: auto; }
  .hero .cta { align-items: stretch; flex-direction: column; }
  .hero .cta .btn { width: 100%; }
}

/* Последний слой: уменьшенное движение не может быть отменено поздним hover. */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .hero__copy, .hero__scene, .hero__parallax, .hero__drift, .hero__light, .hero__signal, .hero__rail,
  .reveal, .js .reveal, .js .reveal.in, .chart-reveal,
  .card, .card:hover, .step, .step:hover, .btn, .btn:active {
    opacity: 1 !important;
    transform: none !important;
  }
}