:root {
  color-scheme: dark;
  --bg: #07090d;
  --ink: #f5f1e8;
  --muted: #aeb7c4;
  --muted-2: #7f8a9a;
  --line: rgba(245, 241, 232, 0.15);
  --panel: rgba(255, 255, 255, 0.06);
  --panel-strong: rgba(255, 255, 255, 0.1);
  --gold: #d8b967;
  --gold-2: #f2d58b;
  --blue: #55b5ff;
  --red: #ff4d57;
  --green: #4dd79d;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.46);
  --radius: 8px;
  --slide-w: min(94vw, calc((100vh - 8.5rem) * 16 / 9));
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    radial-gradient(circle at 20% 20%, rgba(216, 185, 103, 0.12), transparent 28rem),
    radial-gradient(circle at 84% 18%, rgba(85, 181, 255, 0.13), transparent 26rem),
    var(--bg);
  background-size:
    72px 72px,
    72px 72px,
    auto,
    auto,
    auto;
  color: var(--ink);
  font-family:
    Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial,
    sans-serif;
  line-height: 1.45;
  letter-spacing: 0;
}

button {
  font: inherit;
}

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

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 100;
  transform: translateY(-160%);
  border-radius: var(--radius);
  background: var(--ink);
  color: #111827;
  padding: 0.65rem 0.9rem;
  text-decoration: none;
  font-weight: 800;
}

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

.deck-shell {
  height: 100dvh;
  min-height: 0;
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
  padding: 1rem;
}

.deck-topbar,
.deck-controls {
  width: var(--slide-w);
  margin: 0 auto;
}

.deck-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3.5rem;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 800;
}

.brand-mark {
  display: inline-grid;
  width: 2.65rem;
  height: 2.65rem;
  place-items: center;
  border: 1px solid rgba(216, 185, 103, 0.55);
  border-radius: var(--radius);
  background: rgba(216, 185, 103, 0.12);
  color: var(--gold-2);
  font-size: 0.76rem;
}

.topbar-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}

.deck-counter {
  color: var(--muted);
  font-size: 0.86rem;
  font-variant-numeric: tabular-nums;
}

.icon-button,
.nav-button,
.dialog-close {
  appearance: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink);
  cursor: pointer;
}

.icon-button {
  width: 2.45rem;
  height: 2.45rem;
}

.viewport {
  display: grid;
  place-items: center;
  min-height: 0;
}

.slide {
  position: relative;
  display: none;
  width: var(--slide-w);
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid rgba(245, 241, 232, 0.17);
  border-radius: 12px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 30%),
    linear-gradient(180deg, #111827, #07090d 82%);
  box-shadow: var(--shadow);
}

.slide.is-active {
  display: block;
}

.slide::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(245, 241, 232, 0.04) 1px, transparent 1px),
    linear-gradient(rgba(245, 241, 232, 0.035) 1px, transparent 1px);
  background-size: 4.8rem 4.8rem;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.72), transparent 78%);
}

.slide-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.slide-content {
  position: relative;
  z-index: 2;
  height: 100%;
  padding: clamp(2rem, 4vw, 4.1rem);
}

.kicker {
  margin: 0 0 0.85rem;
  color: var(--gold-2);
  font-size: clamp(0.76rem, 1.08vw, 0.98rem);
  font-weight: 900;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 58rem;
  margin-bottom: 1.05rem;
  font-size: clamp(3.5rem, 7vw, 6.6rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  max-width: 54rem;
  margin-bottom: 1.05rem;
  font-size: clamp(2.15rem, 4.15vw, 4.4rem);
  line-height: 1.06;
  letter-spacing: 0;
}

.lede {
  max-width: 43rem;
  margin-bottom: 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.35vw, 1.35rem);
}

.evidence-bg img {
  position: absolute;
  width: 48%;
  min-width: 28rem;
  border: 1px solid rgba(245, 241, 232, 0.16);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  opacity: 0.45;
  filter: saturate(0.82) contrast(1.08);
}

.evidence-bg img:first-child {
  right: -8%;
  top: 7%;
  transform: rotate(-3deg);
}

.evidence-bg img:last-child {
  right: 14%;
  bottom: -10%;
  transform: rotate(2deg);
}

.evidence-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 9, 13, 0.98), rgba(7, 9, 13, 0.82) 48%, rgba(7, 9, 13, 0.34)),
    linear-gradient(0deg, rgba(7, 9, 13, 0.86), transparent 55%, rgba(7, 9, 13, 0.6));
}

.hero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-line {
  max-width: 42rem;
  margin-bottom: 1.6rem;
  color: var(--ink);
  font-size: clamp(1.4rem, 2.2vw, 2.35rem);
  font-weight: 800;
}

.hero-divider {
  width: 7.5rem;
  height: 0.22rem;
  margin: 0 0 1.25rem;
  background: linear-gradient(90deg, var(--gold), var(--blue));
}

.hero-subtitle {
  max-width: 43rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.5vw, 1.45rem);
}

.hero-proof {
  display: inline-flex;
  width: fit-content;
  gap: 0.7rem;
  align-items: baseline;
  margin-top: 2rem;
  border-left: 4px solid var(--red);
  padding-left: 1rem;
  color: var(--muted);
}

.hero-proof strong {
  color: var(--ink);
}

.split-layout,
.conversion-layout,
.ops-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(2rem, 4vw, 4.5rem);
  align-items: center;
}

.metric-board {
  display: grid;
  gap: 1rem;
}

.metric {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 1.15rem 1.25rem;
}

.metric span,
.price-card span,
.ops-cards span,
.case-score span,
.closing-grid span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 900;
}

.metric strong {
  display: block;
  margin: 0.1rem 0 0.15rem;
  font-size: clamp(2.35rem, 5vw, 4.6rem);
  line-height: 1;
}

.metric p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(0.86rem, 1vw, 1rem);
}

.metric.danger strong {
  color: var(--red);
}

.metric.blue strong {
  color: var(--blue);
}

.metric.gold strong {
  color: var(--gold-2);
}

.conversion-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.065);
  padding: clamp(1.25rem, 2.6vw, 2.2rem);
}

.bar-row {
  display: grid;
  gap: 0.7rem;
  margin-bottom: 1.4rem;
}

.bar-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.bar-label span {
  color: var(--muted);
  font-weight: 800;
}

.bar-label strong {
  font-size: clamp(1.55rem, 3vw, 2.8rem);
}

.bar-track {
  height: 1.35rem;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.09);
}

.bar-track span {
  display: block;
  width: var(--value);
  height: 100%;
  border-radius: inherit;
}

.legacy .bar-track span {
  background: linear-gradient(90deg, #7f8a9a, #b2bcc9);
}

.modern .bar-track span {
  background: linear-gradient(90deg, var(--blue), var(--gold-2));
}

.multiplier {
  display: grid;
  place-items: center;
  min-height: 12rem;
  margin-top: 1.2rem;
  border: 1px solid rgba(216, 185, 103, 0.55);
  border-radius: var(--radius);
  background: rgba(216, 185, 103, 0.11);
  text-align: center;
}

.multiplier span {
  color: var(--muted);
  font-weight: 900;
}

.multiplier strong {
  color: var(--gold-2);
  font-size: clamp(4rem, 9vw, 8rem);
  line-height: 0.9;
}

.ruins-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.12fr);
  grid-template-rows: 1fr 1fr;
  gap: 1.2rem 3rem;
  align-items: stretch;
}

.ruins-layout .narrative {
  grid-row: 1 / -1;
  align-self: center;
}

.code-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
  background: var(--panel);
}

.panel-tag {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
}

.code-panel code {
  display: block;
  margin: 0.85rem 0;
  overflow-wrap: anywhere;
  color: var(--muted);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.82rem;
}

.code-panel strong {
  font-size: clamp(1.1rem, 1.5vw, 1.45rem);
}

.code-panel p {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.code-panel.bad {
  border-color: rgba(255, 77, 87, 0.38);
}

.code-panel.bad strong {
  color: var(--red);
}

.code-panel.good {
  border-color: rgba(85, 181, 255, 0.44);
  background: rgba(85, 181, 255, 0.09);
}

.code-panel.good strong {
  color: var(--blue);
}

.weapon-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.95fr);
  gap: 2rem 3rem;
  align-items: center;
}

.weapon-layout > div:first-child {
  grid-row: span 2;
}

.flow-map {
  display: grid;
  gap: 0.8rem;
}

.flow-map span {
  border: 1px solid rgba(85, 181, 255, 0.34);
  border-radius: var(--radius);
  background: rgba(85, 181, 255, 0.1);
  padding: 0.9rem 1rem;
  font-weight: 900;
}

.flow-map i {
  width: 2px;
  height: 1.1rem;
  margin-left: 1.2rem;
  background: linear-gradient(var(--blue), var(--gold));
}

.tech-matrix {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.tech-matrix span,
.model-wall span {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.065);
  padding: 0.55rem 0.75rem;
  color: var(--ink);
  font-weight: 800;
}

.section-heading {
  margin-bottom: 1.8rem;
}

.section-heading .lede {
  max-width: 45rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.price-card,
.ops-cards article,
.closing-grid article {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 1.2rem;
}

.price-card {
  min-height: 20rem;
}

.price-card.featured {
  border-color: rgba(216, 185, 103, 0.75);
  background: rgba(216, 185, 103, 0.1);
}

.price-card em {
  position: absolute;
  right: 1rem;
  top: 1rem;
  border-radius: 999px;
  background: var(--gold);
  color: #171205;
  padding: 0.25rem 0.62rem;
  font-size: 0.75rem;
  font-style: normal;
  font-weight: 900;
}

.price-card strong {
  display: block;
  margin: 0.7rem 0 0.25rem;
  font-size: clamp(2.1rem, 4vw, 3.8rem);
  line-height: 1;
}

.price-card p,
.price-card li {
  color: var(--muted);
}

.price-card ul {
  display: grid;
  gap: 0.45rem;
  margin: 1rem 0 0;
  padding-left: 1.1rem;
}

.ops-layout {
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
}

.model-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.ops-cards {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.ops-cards strong {
  display: block;
  margin: 0.55rem 0 0.45rem;
  font-size: clamp(1.6rem, 2.8vw, 2.8rem);
}

.ops-cards p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

#slide-7 .slide-content {
  padding: clamp(1.7rem, 3.2vw, 3.2rem);
}

#slide-7 h2 {
  max-width: 48rem;
  font-size: clamp(1.9rem, 3.4vw, 3.65rem);
}

#slide-7 .lede {
  font-size: clamp(0.92rem, 1.12vw, 1.1rem);
}

#slide-7 .model-wall,
#slide-7 .ops-cards {
  gap: 0.62rem;
}

#slide-7 .model-wall span {
  padding: 0.42rem 0.62rem;
  font-size: 0.86rem;
}

#slide-7 .ops-cards article {
  padding: 0.88rem;
}

#slide-7 .ops-cards strong {
  font-size: clamp(1.35rem, 2.2vw, 2.2rem);
}

#slide-7 .ops-cards p {
  font-size: 0.82rem;
  line-height: 1.35;
}

.timeline-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 2rem 3rem;
  align-items: center;
}

.cycle-list {
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.cycle-list li {
  display: grid;
  grid-template-columns: 3.5rem minmax(0, 1fr);
  gap: 0.3rem 0.85rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.8rem;
}

.cycle-list span {
  grid-row: span 2;
  color: var(--gold-2);
  font-weight: 900;
  font-size: 1.45rem;
}

.cycle-list strong {
  font-size: 1.08rem;
}

.cycle-list p {
  margin: 0;
  color: var(--muted);
}

.warning-strip {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1rem;
  align-items: center;
  border: 1px solid rgba(255, 77, 87, 0.45);
  border-radius: var(--radius);
  background: rgba(255, 77, 87, 0.1);
  padding: 1rem 1.2rem;
}

.warning-strip strong {
  color: var(--red);
}

.warning-strip span {
  color: var(--muted);
}

.case-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: 2rem;
  align-items: center;
}

.case-score {
  width: fit-content;
  margin-top: 1.3rem;
  border-left: 4px solid var(--gold);
  padding-left: 1rem;
}

.case-score strong {
  display: block;
  margin-top: 0.3rem;
  font-size: clamp(1.25rem, 1.7vw, 1.6rem);
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.evidence-card {
  appearance: none;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease;
}

.evidence-card:hover {
  transform: translateY(-3px);
  border-color: rgba(85, 181, 255, 0.55);
  background: var(--panel-strong);
}

.evidence-card img {
  width: 100%;
  height: clamp(7.8rem, 12vw, 10.8rem);
  object-fit: cover;
  object-position: top center;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

button[data-title^="ChatGPT"] img {
  object-position: center 52%;
}

button[data-title^="Gemini"] img {
  object-position: center 37%;
}

button[data-title^="Grok"] img {
  object-position: center 56%;
}

button[data-title^="Claude"] img {
  object-position: center 64%;
}

.evidence-card span,
.evidence-card strong {
  display: block;
  padding: 0 0.85rem;
}

.evidence-card span {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
}

.evidence-card strong {
  margin: 0.12rem 0 0.8rem;
  color: var(--gold-2);
  font-size: 1.05rem;
}

#slide-9 .slide-content {
  padding: clamp(1.7rem, 3.4vw, 3.45rem);
}

#slide-9 h2 {
  font-size: clamp(1.95rem, 3.5vw, 3.72rem);
}

#slide-9 .lede {
  font-size: clamp(0.94rem, 1.12vw, 1.08rem);
}

#slide-9 .evidence-grid {
  gap: 0.65rem;
}

#slide-9 .evidence-card img {
  height: clamp(7.2rem, 11vw, 9.8rem);
}

.final-bg {
  background:
    radial-gradient(circle at center, rgba(216, 185, 103, 0.22), transparent 22rem),
    linear-gradient(135deg, rgba(255, 77, 87, 0.14), transparent 34%),
    linear-gradient(180deg, rgba(7, 9, 13, 0), rgba(7, 9, 13, 0.88));
}

.closing-layout {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.closing-claim {
  max-width: 50rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.5vw, 1.55rem);
}

.closing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.closing-grid strong {
  display: block;
  margin-top: 0.6rem;
  font-size: clamp(1.1rem, 1.5vw, 1.45rem);
}

.final-line {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: baseline;
  border-top: 1px solid var(--line);
  padding-top: 1.35rem;
  font-size: clamp(1.75rem, 3vw, 3.15rem);
  font-weight: 900;
}

.final-line strong {
  color: var(--gold-2);
}

.deck-controls {
  display: grid;
  grid-template-columns: 2.75rem minmax(0, 1fr) 2.75rem;
  gap: 0.8rem;
  align-items: center;
  min-height: 3.8rem;
}

.nav-button {
  width: 2.75rem;
  height: 2.75rem;
  font-size: 1.25rem;
}

.nav-button:disabled {
  cursor: not-allowed;
  opacity: 0.35;
}

.icon-button:hover,
.nav-button:hover,
.dialog-close:hover {
  background: rgba(255, 255, 255, 0.12);
}

.progress {
  height: 0.42rem;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.09);
}

.progress span {
  display: block;
  width: 10%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--gold), var(--blue));
  transition: width 180ms ease;
}

.image-dialog {
  width: min(1120px, calc(100vw - 2rem));
  max-height: calc(100vh - 2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #090d14;
  color: var(--ink);
  padding: 1rem;
  box-shadow: var(--shadow);
}

.image-dialog::backdrop {
  background: rgba(0, 0, 0, 0.78);
}

.image-dialog h2 {
  margin: 0 3rem 0.8rem 0;
  font-size: 1.2rem;
}

.image-dialog img {
  width: 100%;
  max-height: calc(100vh - 8rem);
  object-fit: contain;
  background: #fff;
}

.dialog-close {
  position: absolute;
  right: 1rem;
  top: 0.8rem;
  width: 2.25rem;
  height: 2.25rem;
  font-size: 1.35rem;
  line-height: 1;
}

@media (max-width: 900px), (max-height: 620px) {
  body {
    overflow: auto;
  }

  .deck-shell {
    min-height: 100dvh;
    padding: 0.7rem;
  }

  .deck-topbar,
  .deck-controls,
  .slide {
    width: min(100%, 96vw);
  }

  .slide {
    min-height: auto;
  }

  .slide-content {
    padding: clamp(1rem, 3vw, 1.6rem);
  }

  .split-layout,
  .conversion-layout,
  .ruins-layout,
  .weapon-layout,
  .ops-layout,
  .timeline-layout,
  .case-layout {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .ruins-layout {
    grid-template-rows: auto;
  }

  .ruins-layout .narrative,
  .weapon-layout > div:first-child {
    grid-row: auto;
  }

  .pricing-grid,
  .ops-cards,
  .closing-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .price-card {
    min-height: auto;
  }

  .metric-board {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .metric {
    padding: 0.8rem;
  }

  .metric strong {
    font-size: 2rem;
  }

  .evidence-card img {
    height: 7rem;
  }
}

@media (max-width: 620px) {
  html,
  body {
    height: 100%;
    overflow: hidden;
  }

  .deck-shell {
    height: 100dvh;
    grid-template-rows: 3.55rem minmax(0, 1fr) 3.7rem;
    overflow: hidden;
    padding: 0.55rem;
  }

  .deck-topbar,
  .deck-controls {
    width: 100%;
    min-height: 0;
  }

  .deck-topbar {
    align-self: start;
  }

  .deck-controls {
    align-self: end;
  }

  .brand-lockup span:last-child {
    max-width: 11rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .slide {
    aspect-ratio: auto;
    width: 100%;
    height: 100%;
    min-height: 0;
  }

  .slide-content {
    height: 100%;
    overflow: hidden;
    padding: 1rem;
  }

  .split-layout,
  .conversion-layout,
  .ruins-layout,
  .weapon-layout,
  .ops-layout,
  .timeline-layout,
  .case-layout {
    align-content: start;
    align-items: start;
  }

  .hero-content,
  .closing-layout {
    justify-content: center;
  }

  .kicker {
    margin-bottom: 0.45rem;
    font-size: 0.66rem;
  }

  h1 {
    font-size: clamp(2.15rem, 12vw, 2.85rem);
    line-height: 1;
  }

  h2 {
    margin-bottom: 0.65rem;
    font-size: clamp(1.38rem, 7.3vw, 1.85rem);
    line-height: 1.08;
  }

  .lede {
    font-size: 0.86rem;
    line-height: 1.38;
  }

  .hero-line {
    font-size: 1.22rem;
    line-height: 1.22;
  }

  .hero-subtitle {
    font-size: 0.92rem;
  }

  .hero-proof {
    margin-top: 1rem;
    font-size: 0.9rem;
    line-height: 1.32;
  }

  .metric-board {
    gap: 0.55rem;
  }

  .metric {
    padding: 0.58rem 0.65rem;
  }

  .metric strong {
    font-size: 1.8rem;
  }

  .metric p {
    font-size: 0.76rem;
    line-height: 1.32;
  }

  .conversion-panel {
    padding: 0.85rem;
  }

  .bar-row {
    gap: 0.35rem;
    margin-bottom: 0.75rem;
  }

  .bar-track {
    height: 0.9rem;
  }

  .multiplier {
    min-height: 6.8rem;
    margin-top: 0.6rem;
  }

  .multiplier strong {
    font-size: 3.6rem;
  }

  .code-panel {
    padding: 0.7rem;
  }

  .code-panel code,
  .code-panel p {
    font-size: 0.72rem;
    line-height: 1.3;
  }

  .flow-map {
    gap: 0.42rem;
  }

  .flow-map span {
    padding: 0.5rem 0.65rem;
    font-size: 0.82rem;
  }

  .flow-map i {
    height: 0.42rem;
  }

  .tech-matrix {
    gap: 0.36rem;
  }

  .tech-matrix span {
    padding: 0.35rem 0.48rem;
    font-size: 0.72rem;
  }

  .section-heading {
    margin-bottom: 0.75rem;
  }

  .price-card {
    padding: 0.65rem;
  }

  .price-card strong {
    margin: 0.3rem 0 0.15rem;
    font-size: 1.65rem;
  }

  .price-card p {
    margin-bottom: 0;
    font-size: 0.78rem;
  }

  .price-card ul {
    display: none;
  }

  .price-card em {
    top: 0.62rem;
    right: 0.62rem;
    padding: 0.18rem 0.45rem;
    font-size: 0.66rem;
  }

  #slide-6 .pricing-grid {
    gap: 0.55rem;
  }

  #slide-6 .section-heading .lede {
    display: none;
  }

  #slide-7 .slide-content,
  #slide-9 .slide-content {
    padding: 0.9rem;
  }

  #slide-7 h2,
  #slide-9 h2 {
    font-size: 1.34rem;
  }

  #slide-7 .lede,
  #slide-9 .lede {
    display: none;
  }

  #slide-7 .model-wall {
    gap: 0.32rem;
  }

  #slide-7 .model-wall span {
    padding: 0.26rem 0.4rem;
    font-size: 0.66rem;
  }

  #slide-7 .ops-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.45rem;
  }

  #slide-7 .ops-cards article {
    padding: 0.55rem;
  }

  #slide-7 .ops-cards strong {
    margin: 0.22rem 0;
    font-size: 1.32rem;
  }

  #slide-7 .ops-cards p {
    display: -webkit-box;
    overflow: hidden;
    font-size: 0.68rem;
    line-height: 1.26;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
  }

  .cycle-list {
    gap: 0.45rem;
  }

  .cycle-list li {
    grid-template-columns: 2.4rem minmax(0, 1fr);
    padding-bottom: 0.42rem;
  }

  .cycle-list span {
    font-size: 1rem;
  }

  .cycle-list strong {
    font-size: 0.86rem;
  }

  .cycle-list p {
    font-size: 0.72rem;
    line-height: 1.25;
  }

  .warning-strip {
    margin-top: 0.2rem;
    padding: 0.58rem 0.65rem;
    font-size: 0.75rem;
    line-height: 1.28;
  }

  #slide-9 .case-score {
    margin-top: 0.75rem;
    padding-left: 0.65rem;
  }

  #slide-9 .case-score strong {
    font-size: 0.98rem;
  }

  #slide-9 .evidence-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.45rem;
  }

  #slide-9 .evidence-card img {
    height: 4.75rem;
  }

  #slide-9 .evidence-card span {
    margin-top: 0.4rem;
    font-size: 0.65rem;
  }

  #slide-9 .evidence-card strong {
    margin-bottom: 0.42rem;
    font-size: 0.78rem;
  }

  .closing-claim {
    font-size: 0.9rem;
    line-height: 1.36;
  }

  .closing-grid {
    gap: 0.55rem;
    margin: 1rem 0;
  }

  .closing-grid article {
    padding: 0.65rem;
  }

  .closing-grid strong {
    margin-top: 0.3rem;
    font-size: 0.88rem;
  }

  .final-line {
    padding-top: 0.85rem;
    font-size: 1.35rem;
    line-height: 1.2;
  }

  .image-dialog {
    width: calc(100vw - 0.7rem);
    height: calc(100dvh - 0.7rem);
    max-height: none;
    overflow: auto;
    padding: 0.75rem;
  }

  .image-dialog h2 {
    min-width: 17rem;
    margin: 0 3rem 0.65rem 0;
    font-size: 0.98rem;
    line-height: 1.25;
  }

  .image-dialog img {
    width: 900px;
    max-width: none;
    max-height: none;
  }

  .pricing-grid,
  .ops-cards,
  .closing-grid,
  .metric-board {
    grid-template-columns: 1fr;
  }

  .hero-proof,
  .warning-strip,
  .final-line {
    display: block;
  }

  .evidence-bg img {
    opacity: 0.22;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}