:root {
  --scene-blue: #538ff3;
  --scene-blue-deep: #256fd9;
  --scene-blue-soft: #edf4ff;
  --scene-blue-pale: #f6f9ff;
  --scene-ink: #182235;
  --scene-copy: #465164;
  --scene-muted: #728097;
  --scene-line: #dbe4f0;
  --scene-paper: #ffffff;
  --scene-cloud: #f4f6f9;
  --scene-green: #00e681;
  --scene-orange: #ff9a62;
  --scene-shadow: 0 18px 50px rgba(24, 34, 53, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  color: var(--scene-ink);
  background: var(--scene-paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

body,
button,
a,
summary {
  -webkit-tap-highlight-color: transparent;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
summary {
  font: inherit;
}

h1,
h2,
h3,
p,
figure,
blockquote,
dl,
dd {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

:focus-visible {
  outline: 3px solid rgba(83, 143, 243, 0.42);
  outline-offset: 3px;
}

.scene-skip {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 16px;
  padding: 9px 14px;
  border-radius: 8px;
  color: #fff;
  background: var(--scene-ink);
  transform: translateY(-160%);
}

.scene-skip:focus {
  transform: translateY(0);
}

.scene-masthead {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid rgba(219, 228, 240, 0.85);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}

.scene-navigation {
  width: min(1240px, calc(100% - 40px));
  min-height: 74px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 28px;
}

.scene-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  font-size: 18px;
  font-weight: 800;
}

.scene-brand img {
  width: 42px;
  height: 42px;
  border-radius: 11px;
}

.scene-nav-links {
  display: flex;
  align-items: center;
  gap: 25px;
  margin-left: auto;
  color: var(--scene-copy);
  font-size: 14px;
}

.scene-nav-links a {
  padding: 8px 0;
}

.scene-nav-links a:hover {
  color: var(--scene-blue-deep);
}

.scene-nav-download {
  min-height: 42px;
  padding: 8px 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--scene-blue);
  border-radius: 9px;
  color: #fff;
  background: var(--scene-blue);
  font-size: 14px;
  font-weight: 700;
}

.scene-nav-download:hover {
  border-color: var(--scene-blue-deep);
  background: var(--scene-blue-deep);
}

.scene-mobile-menu {
  display: none;
  position: relative;
}

.scene-signal-intro {
  width: min(1240px, calc(100% - 40px));
  min-height: 720px;
  margin: 0 auto;
  padding: 46px 0 54px;
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(540px, 1.12fr);
  align-items: center;
  gap: 60px;
}

.scene-intro-message {
  padding-left: 20px;
}

.scene-product-kind {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  color: var(--scene-blue-deep);
  font-size: 14px;
  font-weight: 700;
}

.scene-product-kind i {
  font-size: 18px;
}

.scene-intro-message h1 {
  font-size: clamp(48px, 5.2vw, 64px);
  line-height: 1.08;
  letter-spacing: 0;
}

.scene-intro-claim {
  margin-top: 18px;
  color: var(--scene-blue-deep);
  font-size: clamp(24px, 2.2vw, 30px);
  font-weight: 800;
  line-height: 1.35;
}

.scene-intro-lead {
  max-width: 570px;
  margin-top: 24px;
  color: var(--scene-copy);
  font-size: 17px;
}

.scene-intro-actions {
  margin-top: 30px;
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

.scene-get-button {
  min-height: 54px;
  padding: 12px 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border-radius: 11px;
  color: #fff;
  background: var(--scene-blue);
  box-shadow: 0 12px 28px rgba(83, 143, 243, 0.28);
  font-weight: 800;
}

.scene-get-button:hover {
  background: var(--scene-blue-deep);
  transform: translateY(-2px);
}

.scene-text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--scene-copy);
  font-weight: 700;
}

.scene-text-link:hover {
  color: var(--scene-blue-deep);
}

.scene-intro-points {
  margin-top: 28px;
  display: flex;
  gap: 18px 24px;
  flex-wrap: wrap;
  color: var(--scene-muted);
  font-size: 13px;
}

.scene-intro-points li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.scene-intro-points i {
  color: var(--scene-green);
  font-size: 16px;
}

.scene-signal-stage {
  position: relative;
  min-height: 620px;
  overflow: hidden;
  border-radius: 30px 8px 30px 8px;
  background-color: var(--scene-ink);
  background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 42px 42px;
  box-shadow: var(--scene-shadow);
  isolation: isolate;
}

.scene-signal-stage::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0 auto 0 39%;
  width: 1px;
  background: rgba(255, 255, 255, 0.12);
}

.scene-signal-stage figcaption {
  position: absolute;
  top: 26px;
  left: 28px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
}

.scene-hero-screen {
  position: absolute;
  z-index: 3;
  top: 56px;
  right: 38px;
  width: 286px;
  overflow: hidden;
  border: 8px solid #ffffff;
  border-radius: 28px;
  background: #eceaed;
  box-shadow: 0 24px 55px rgba(0, 0, 0, .32);
}

.scene-hero-screen img {
  width: 100%;
  height: auto;
}

.scene-sample-rails {
  position: absolute;
  z-index: 2;
  top: 116px;
  left: 28px;
  width: 280px;
  color: #fff;
}

.scene-rail {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 48px;
  font-size: 12px;
  letter-spacing: .08em;
}

.scene-rail b {
  width: 44px;
  color: rgba(255, 255, 255, .76);
}

.scene-rail i {
  position: relative;
  width: 195px;
  height: 2px;
  background: rgba(255, 255, 255, .18);
}

.scene-rail i::before,
.scene-rail i::after {
  content: "";
  position: absolute;
  top: 50%;
  border-radius: 50%;
  transform: translateY(-50%);
}

.scene-rail i::before {
  left: var(--dot-left, 36%);
  width: 9px;
  height: 9px;
  background: var(--scene-blue);
  box-shadow: 0 0 0 5px rgba(83, 143, 243, .18);
}

.scene-rail i::after {
  right: 0;
  width: 4px;
  height: 4px;
  background: rgba(255, 255, 255, .7);
}

.scene-rail-gpu { --dot-left: 57%; }
.scene-rail-temp { --dot-left: 72%; }
.scene-rail-temp i::before { background: var(--scene-orange); box-shadow: 0 0 0 5px rgba(255, 154, 98, .17); }
.scene-rail-fps { --dot-left: 45%; }

.scene-mode-ruler {
  position: absolute;
  z-index: 5;
  left: 28px;
  bottom: 30px;
  width: 245px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(255, 255, 255, .22);
  color: rgba(255, 255, 255, .74);
  font-size: 12px;
}

.scene-mode-ruler span {
  position: relative;
  padding-top: 13px;
}

.scene-mode-ruler span::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--scene-blue);
}

.scene-mode-ruler b {
  margin-right: 5px;
  color: #fff;
}

.scene-observe-chain {
  padding: 72px max(20px, calc((100% - 1160px) / 2));
  background: var(--scene-blue-pale);
}

.scene-chain-heading {
  max-width: 690px;
}

.scene-chain-heading > span,
.scene-cases-heading > span,
.scene-notes-heading > span {
  color: var(--scene-blue-deep);
  font-size: 13px;
  font-weight: 800;
}

.scene-chain-heading h2,
.scene-frame-copy h2,
.scene-capability-copy h2,
.scene-cases-heading h2,
.scene-mode-explainer h2,
.scene-notes-heading h2,
.scene-question-intro h2 {
  margin-top: 7px;
  font-size: clamp(28px, 3vw, 38px);
  line-height: 1.35;
}

.scene-chain-heading p {
  margin-top: 14px;
  color: var(--scene-copy);
}

.scene-chain-list {
  position: relative;
  margin-top: 38px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid #b8c8dd;
}

.scene-chain-list li {
  position: relative;
  padding: 32px 30px 4px 0;
}

.scene-chain-list li::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border: 2px solid var(--scene-blue);
  border-radius: 50%;
  background: var(--scene-blue-pale);
}

.scene-chain-list li > b {
  color: var(--scene-blue);
  font-size: 12px;
}

.scene-chain-list h3 {
  margin-top: 8px;
  font-size: 19px;
}

.scene-chain-list p {
  margin-top: 8px;
  color: var(--scene-copy);
  font-size: 14px;
}

.scene-frame-archive {
  padding: 74px max(20px, calc((100% - 1200px) / 2));
  display: grid;
  grid-template-columns: .82fr 1.18fr;
  align-items: center;
  gap: 70px;
  color: #fff;
  background: #111b2d;
}

.scene-index-mark {
  display: inline-block;
  color: var(--scene-blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
}

.scene-frame-copy h2 {
  max-width: 520px;
  margin-top: 12px;
}

.scene-frame-copy > p {
  max-width: 560px;
  margin-top: 20px;
  color: rgba(255, 255, 255, .7);
}

.scene-reading-list {
  margin-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, .16);
}

.scene-reading-list > div {
  padding: 17px 0;
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, .16);
}

.scene-reading-list dt {
  color: #fff;
  font-weight: 800;
}

.scene-reading-list dd {
  color: rgba(255, 255, 255, .62);
  font-size: 14px;
}

.scene-frame-visuals {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(190px, .63fr);
  align-items: center;
  gap: 24px;
}

.scene-frame-visuals figure {
  min-width: 0;
}

.scene-frame-visuals img {
  width: 100%;
  height: auto;
  border: 7px solid #fff;
  background: #eceaed;
  box-shadow: 0 28px 60px rgba(0, 0, 0, .35);
}

.scene-report-screen img {
  border-radius: 25px;
}

.scene-history-screen img {
  border-radius: 17px;
}

.scene-frame-visuals figcaption {
  margin-top: 13px;
  color: rgba(255, 255, 255, .62);
  font-size: 12px;
}

.scene-frame-visuals figcaption b,
.scene-frame-visuals figcaption span {
  display: block;
}

.scene-frame-visuals figcaption b {
  margin-bottom: 2px;
  color: #fff;
  font-size: 14px;
}

.scene-capability-map {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
  padding: 74px 0;
  display: grid;
  grid-template-columns: minmax(320px, .78fr) minmax(0, 1.22fr);
  align-items: center;
  gap: 76px;
}

.scene-function-catalog {
  padding: 22px;
  border: 1px solid var(--scene-line);
  border-radius: 8px 28px 8px 28px;
  background: var(--scene-cloud);
}

.scene-function-catalog img {
  width: 100%;
  height: auto;
  border-radius: 12px;
}

.scene-function-catalog figcaption {
  margin-top: 15px;
  color: var(--scene-muted);
  font-size: 12px;
}

.scene-capability-copy > p {
  max-width: 670px;
  margin-top: 16px;
  color: var(--scene-copy);
}

.scene-capability-lines {
  margin-top: 28px;
  border-top: 1px solid var(--scene-line);
}

.scene-capability-lines section {
  padding: 20px 0;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 18px;
  border-bottom: 1px solid var(--scene-line);
}

.scene-capability-number {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--scene-blue-deep);
  background: var(--scene-blue-soft);
  font-weight: 900;
}

.scene-capability-lines h3 {
  font-size: 19px;
}

.scene-capability-lines p {
  margin-top: 5px;
  color: var(--scene-copy);
  font-size: 14px;
}

.scene-use-cases {
  padding: 64px max(20px, calc((100% - 1160px) / 2));
  background: var(--scene-cloud);
}

.scene-cases-heading {
  display: grid;
  grid-template-columns: 170px 1fr;
  align-items: end;
  column-gap: 24px;
}

.scene-cases-heading h2 {
  max-width: 760px;
}

.scene-game-case {
  margin-top: 34px;
  padding: 32px 36px;
  display: grid;
  grid-template-columns: 82px 1fr;
  align-items: center;
  gap: 24px;
  border-left: 6px solid var(--scene-blue);
  color: #fff;
  background: var(--scene-ink);
}

.scene-game-case > i {
  font-size: 58px;
  color: var(--scene-blue);
}

.scene-game-case span,
.scene-daily-cases span {
  color: var(--scene-blue);
  font-size: 12px;
  font-weight: 800;
}

.scene-game-case h3 {
  margin-top: 4px;
  font-size: 25px;
}

.scene-game-case p {
  margin-top: 8px;
  color: rgba(255, 255, 255, .7);
}

.scene-daily-cases {
  margin-top: 18px;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 18px;
}

.scene-daily-cases article {
  padding: 27px;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  border: 1px solid var(--scene-line);
  background: #fff;
}

.scene-daily-cases article:first-child {
  border-radius: 0 18px 18px 18px;
}

.scene-daily-cases article:last-child {
  border-radius: 18px 18px 0 18px;
}

.scene-daily-cases > article > i {
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--scene-blue-deep);
  background: var(--scene-blue-soft);
  font-size: 26px;
}

.scene-daily-cases h3 {
  margin-top: 4px;
  font-size: 18px;
}

.scene-daily-cases p {
  margin-top: 7px;
  color: var(--scene-copy);
  font-size: 14px;
}

.scene-mode-ladder {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 74px 0;
  display: grid;
  grid-template-columns: 1.08fr minmax(300px, .72fr);
  align-items: center;
  gap: 88px;
}

.scene-mode-explainer > p {
  margin-top: 16px;
  color: var(--scene-copy);
}

.scene-mode-explainer ol {
  position: relative;
  margin-top: 30px;
  padding-left: 52px;
}

.scene-mode-explainer ol::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 17px;
  width: 2px;
  background: var(--scene-line);
}

.scene-mode-explainer li {
  position: relative;
  padding: 0 0 24px;
}

.scene-mode-explainer li:last-child {
  padding-bottom: 0;
}

.scene-mode-explainer li::before {
  content: "";
  position: absolute;
  top: 7px;
  left: -42px;
  width: 12px;
  height: 12px;
  border: 5px solid #fff;
  border-radius: 50%;
  background: var(--scene-blue);
  box-shadow: 0 0 0 1px var(--scene-blue);
}

.scene-mode-explainer li:nth-child(2)::before {
  background: var(--scene-orange);
  box-shadow: 0 0 0 1px var(--scene-orange);
}

.scene-mode-explainer li:nth-child(3)::before {
  background: var(--scene-green);
  box-shadow: 0 0 0 1px #00bf6c;
}

.scene-mode-explainer li b {
  font-size: 18px;
}

.scene-mode-explainer li p {
  margin-top: 4px;
  color: var(--scene-copy);
  font-size: 14px;
}

.scene-tuning-screen {
  padding: 18px;
  border-radius: 28px 8px;
  background: var(--scene-blue-soft);
}

.scene-tuning-screen img {
  width: 100%;
  height: auto;
  border-radius: 18px;
  box-shadow: 0 16px 38px rgba(24, 34, 53, .15);
}

.scene-tuning-screen figcaption {
  margin-top: 14px;
  color: var(--scene-muted);
  font-size: 12px;
}

.scene-field-notes {
  padding: 68px max(20px, calc((100% - 1180px) / 2));
  background: var(--scene-blue-pale);
}

.scene-notes-heading {
  max-width: 700px;
}

.scene-notes-heading p {
  margin-top: 13px;
  color: var(--scene-copy);
}

.scene-review-columns {
  margin-top: 34px;
  columns: 3;
  column-gap: 18px;
}

.scene-review-note {
  width: 100%;
  margin: 0 0 18px;
  padding: 22px;
  display: inline-block;
  break-inside: avoid;
  border: 1px solid #d8e3f3;
  border-radius: 5px 17px 5px 17px;
  background: #fff;
}

.scene-review-note:nth-child(3n + 2) {
  border-radius: 17px 5px 17px 5px;
}

.scene-review-meta {
  display: grid;
  grid-template-columns: 38px 1fr;
  align-items: center;
  gap: 10px;
}

.scene-review-avatar {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  color: #fff;
  background: var(--scene-blue);
  font-size: 14px;
  font-weight: 800;
}

.scene-review-name,
.scene-stars {
  display: block;
}

.scene-review-name {
  color: var(--scene-ink);
  font-size: 14px;
  font-weight: 800;
}

.scene-stars {
  color: #ffad3d;
  font-size: 12px;
  line-height: 1.3;
}

.scene-review-meta time {
  grid-column: 2;
  color: var(--scene-muted);
  font-size: 11px;
}

.scene-review-note blockquote {
  margin-top: 15px;
  color: var(--scene-copy);
  font-size: 14px;
  line-height: 1.85;
}

.scene-questions {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0;
  display: grid;
  grid-template-columns: .72fr 1.28fr;
  align-items: start;
  gap: 78px;
}

.scene-question-intro {
  position: sticky;
  top: 110px;
}

.scene-question-intro p {
  margin-top: 15px;
  color: var(--scene-copy);
}

.scene-question-list {
  border-top: 1px solid var(--scene-line);
}

.scene-question-list details {
  border-bottom: 1px solid var(--scene-line);
}

.scene-question-list summary {
  min-height: 68px;
  padding: 18px 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

.scene-question-list summary::-webkit-details-marker {
  display: none;
}

.scene-question-list summary i {
  flex: 0 0 auto;
  color: var(--scene-blue);
  font-size: 22px;
  transition: transform .2s ease;
}

.scene-question-list details[open] summary i {
  transform: rotate(45deg);
}

.scene-question-list details p {
  padding: 0 42px 19px 4px;
  color: var(--scene-copy);
  font-size: 14px;
}

.scene-final-download {
  width: min(1200px, calc(100% - 40px));
  margin: 0 auto 64px;
  padding: 44px 50px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  border-radius: 8px 30px;
  color: #fff;
  background: var(--scene-ink);
}

.scene-download-copy {
  display: flex;
  align-items: center;
  gap: 24px;
}

.scene-download-copy > img {
  width: 88px;
  height: 88px;
  border-radius: 21px;
}

.scene-download-copy span {
  color: var(--scene-blue);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .12em;
}

.scene-download-copy h2 {
  margin-top: 4px;
  font-size: clamp(25px, 2.6vw, 34px);
  line-height: 1.35;
}

.scene-download-copy p {
  max-width: 560px;
  margin-top: 7px;
  color: rgba(255, 255, 255, .66);
  font-size: 14px;
}

.scene-download-actions {
  display: flex;
  align-items: center;
  gap: 22px;
}

.scene-download-actions > a {
  min-height: 52px;
  padding: 12px 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 10px;
  color: #fff;
  background: var(--scene-blue);
  font-weight: 800;
  white-space: nowrap;
}

.scene-download-actions > a:hover {
  background: var(--scene-blue-deep);
}

.scene-download-actions figure {
  padding: 8px;
  border-radius: 8px;
  color: var(--scene-ink);
  background: #fff;
  text-align: center;
}

.scene-download-actions figure img {
  width: 104px;
  height: 104px;
}

.scene-download-actions figcaption {
  margin-top: 3px;
  font-size: 10px;
}

.scene-footer {
  padding: 26px max(20px, calc((100% - 1200px) / 2));
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 36px;
  border-top: 1px solid var(--scene-line);
  color: var(--scene-muted);
  font-size: 12px;
}

.scene-footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.scene-footer-brand img {
  width: 38px;
  height: 38px;
  border-radius: 9px;
}

.scene-footer-brand b,
.scene-footer-brand span {
  display: block;
}

.scene-footer-brand b {
  color: var(--scene-ink);
  font-size: 14px;
}

.scene-footer nav {
  display: flex;
  gap: 18px;
}

.scene-footer a:hover {
  color: var(--scene-blue-deep);
}

.scene-back-top {
  position: fixed;
  z-index: 90;
  right: 20px;
  bottom: 20px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--scene-line);
  border-radius: 50%;
  color: var(--scene-ink);
  background: #fff;
  box-shadow: 0 10px 25px rgba(24, 34, 53, .13);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity .2s ease, transform .2s ease;
}

.scene-back-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

@media (max-width: 1040px) {
  .scene-nav-links {
    gap: 16px;
  }

  .scene-signal-intro {
    grid-template-columns: minmax(0, .9fr) minmax(500px, 1.1fr);
    gap: 28px;
  }

  .scene-intro-message {
    padding-left: 0;
  }

  .scene-frame-archive {
    gap: 40px;
  }

  .scene-capability-map,
  .scene-mode-ladder {
    gap: 48px;
  }
}

@media (max-width: 900px) {
  .scene-navigation {
    min-height: 66px;
    gap: 12px;
  }

  .scene-nav-links {
    display: none;
  }

  .scene-nav-download {
    margin-left: auto;
  }

  .scene-mobile-menu {
    display: block;
  }

  .scene-mobile-menu summary {
    min-height: 42px;
    padding: 8px 12px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid var(--scene-line);
    border-radius: 9px;
    cursor: pointer;
    list-style: none;
    font-size: 13px;
    font-weight: 700;
  }

  .scene-mobile-menu summary::-webkit-details-marker {
    display: none;
  }

  .scene-mobile-links {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: 190px;
    padding: 8px;
    display: grid;
    border: 1px solid var(--scene-line);
    border-radius: 12px;
    background: #fff;
    box-shadow: var(--scene-shadow);
  }

  .scene-mobile-links a {
    padding: 10px 12px;
    border-radius: 7px;
    font-size: 14px;
  }

  .scene-mobile-links a:hover {
    color: var(--scene-blue-deep);
    background: var(--scene-blue-soft);
  }

  .scene-signal-intro {
    min-height: 0;
    padding: 50px 0 56px;
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .scene-intro-message {
    max-width: 680px;
  }

  .scene-signal-stage {
    min-height: 620px;
  }

  .scene-hero-screen {
    right: 9%;
  }

  .scene-sample-rails {
    left: 8%;
  }

  .scene-mode-ruler {
    left: 8%;
  }

  .scene-chain-list {
    grid-template-columns: repeat(2, 1fr);
    border-top: 0;
  }

  .scene-chain-list li {
    padding-top: 25px;
    border-top: 1px solid #b8c8dd;
  }

  .scene-chain-list li::before {
    top: -5px;
  }

  .scene-frame-archive,
  .scene-capability-map,
  .scene-mode-ladder,
  .scene-questions {
    grid-template-columns: 1fr;
  }

  .scene-frame-copy {
    max-width: 720px;
  }

  .scene-capability-map {
    width: min(760px, calc(100% - 40px));
  }

  .scene-function-catalog {
    max-width: 460px;
    margin: 0 auto;
  }

  .scene-mode-explainer {
    max-width: 700px;
  }

  .scene-tuning-screen {
    max-width: 430px;
    margin: 0 auto;
  }

  .scene-review-columns {
    columns: 2;
  }

  .scene-question-intro {
    position: static;
  }

  .scene-final-download {
    align-items: flex-start;
    flex-direction: column;
  }

  .scene-footer {
    grid-template-columns: 1fr auto;
  }

  .scene-footer nav {
    grid-column: 1 / -1;
    grid-row: 2;
  }
}

@media (max-width: 640px) {
  html {
    scroll-padding-top: 72px;
  }

  .scene-navigation,
  .scene-signal-intro,
  .scene-capability-map,
  .scene-mode-ladder,
  .scene-questions,
  .scene-final-download {
    width: min(100% - 28px, 1240px);
  }

  .scene-navigation {
    min-height: 62px;
  }

  .scene-brand span {
    font-size: 15px;
  }

  .scene-brand img {
    width: 36px;
    height: 36px;
    border-radius: 9px;
  }

  .scene-nav-download {
    min-height: 38px;
    padding: 7px 12px;
    font-size: 12px;
  }

  .scene-mobile-menu summary {
    width: 38px;
    height: 38px;
    min-height: 38px;
    padding: 0;
    justify-content: center;
  }

  .scene-mobile-menu summary span {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
  }

  .scene-signal-intro {
    padding: 38px 0 44px;
    gap: 34px;
  }

  .scene-product-kind {
    font-size: 12px;
  }

  .scene-intro-message h1 {
    font-size: 38px;
  }

  .scene-intro-claim {
    margin-top: 13px;
    font-size: 23px;
  }

  .scene-intro-lead {
    margin-top: 18px;
    font-size: 15px;
  }

  .scene-intro-actions {
    align-items: stretch;
    flex-direction: column;
    gap: 13px;
  }

  .scene-get-button {
    width: 100%;
  }

  .scene-text-link {
    justify-content: center;
  }

  .scene-intro-points {
    gap: 10px 15px;
    font-size: 12px;
  }

  .scene-signal-stage {
    min-height: 558px;
    border-radius: 22px 6px 22px 6px;
  }

  .scene-signal-stage figcaption {
    top: 18px;
    left: 18px;
  }

  .scene-hero-screen {
    top: 54px;
    right: 16px;
    width: min(224px, 64vw);
    border-width: 6px;
    border-radius: 22px;
  }

  .scene-sample-rails {
    top: 102px;
    left: 16px;
    width: 120px;
  }

  .scene-rail {
    gap: 5px;
    margin-bottom: 41px;
    font-size: 10px;
  }

  .scene-rail b {
    width: 36px;
  }

  .scene-rail i {
    width: 75px;
  }

  .scene-mode-ruler {
    left: 18px;
    right: 18px;
    bottom: 22px;
    width: auto;
  }

  .scene-observe-chain,
  .scene-use-cases,
  .scene-field-notes {
    padding: 48px 14px;
  }

  .scene-chain-heading h2,
  .scene-frame-copy h2,
  .scene-capability-copy h2,
  .scene-cases-heading h2,
  .scene-mode-explainer h2,
  .scene-notes-heading h2,
  .scene-question-intro h2 {
    font-size: 26px;
  }

  .scene-chain-list {
    grid-template-columns: 1fr;
  }

  .scene-chain-list li {
    padding-right: 0;
  }

  .scene-frame-archive {
    padding: 50px 14px;
    gap: 35px;
  }

  .scene-frame-visuals {
    margin: 0 -14px;
    padding: 0 14px 10px;
    display: flex;
    align-items: flex-start;
    gap: 14px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: thin;
  }

  .scene-frame-visuals figure {
    flex: 0 0 78%;
    scroll-snap-align: start;
  }

  .scene-frame-visuals .scene-history-screen {
    flex-basis: 67%;
  }

  .scene-capability-map,
  .scene-mode-ladder,
  .scene-questions {
    padding: 50px 0;
    gap: 40px;
  }

  .scene-function-catalog {
    padding: 14px;
  }

  .scene-capability-lines section {
    grid-template-columns: 40px 1fr;
    gap: 12px;
  }

  .scene-capability-number {
    width: 34px;
    height: 34px;
  }

  .scene-cases-heading {
    display: block;
  }

  .scene-cases-heading h2 {
    margin-top: 7px;
  }

  .scene-game-case {
    padding: 26px 22px;
    grid-template-columns: 1fr;
  }

  .scene-game-case > i {
    font-size: 44px;
  }

  .scene-game-case h3 {
    font-size: 21px;
  }

  .scene-daily-cases {
    grid-template-columns: 1fr;
  }

  .scene-daily-cases article {
    padding: 22px;
    grid-template-columns: 46px 1fr;
  }

  .scene-daily-cases > article > i {
    width: 42px;
    height: 42px;
    font-size: 22px;
  }

  .scene-mode-explainer ol {
    padding-left: 44px;
  }

  .scene-review-columns {
    columns: 1;
  }

  .scene-review-note {
    padding: 19px;
  }

  .scene-question-list summary {
    min-height: 62px;
    font-size: 15px;
  }

  .scene-question-list details p {
    padding-right: 8px;
  }

  .scene-final-download {
    margin-bottom: 42px;
    padding: 30px 22px;
    border-radius: 6px 22px;
  }

  .scene-download-copy {
    align-items: flex-start;
    flex-direction: column;
    gap: 17px;
  }

  .scene-download-copy > img {
    width: 66px;
    height: 66px;
    border-radius: 16px;
  }

  .scene-download-actions {
    width: 100%;
  }

  .scene-download-actions > a {
    width: 100%;
  }

  .scene-download-actions figure {
    display: none;
  }

  .scene-footer {
    padding: 24px 14px;
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .scene-footer nav {
    grid-column: auto;
    grid-row: auto;
    gap: 10px 16px;
    flex-wrap: wrap;
  }

  .scene-back-top {
    right: 14px;
    bottom: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}