@font-face {
  font-family: "Geist Sans";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("./assets/fonts/geist/Geist-Variable.woff2") format("woff2");
}

@font-face {
  font-family: "Geist Mono";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("./assets/fonts/geist/GeistMono-Variable.woff2") format("woff2");
}

@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("./assets/fonts/noto-sans-sc/noto-sans-sc-chinese-simplified-400-normal.woff2") format("woff2");
}

@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("./assets/fonts/noto-sans-sc/noto-sans-sc-chinese-simplified-500-normal.woff2") format("woff2");
}

@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("./assets/fonts/noto-sans-sc/noto-sans-sc-chinese-simplified-600-normal.woff2") format("woff2");
}

@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("./assets/fonts/noto-sans-sc/noto-sans-sc-chinese-simplified-700-normal.woff2") format("woff2");
}

:root {
  --gray-1000: #171717;
  --gray-900: #4d4d4d;
  --gray-800: #7d7d7d;
  --gray-700: #8f8f8f;
  --gray-600: #a8a8a8;
  --gray-500: #c9c9c9;
  --gray-400: #eaeaea;
  --gray-300: #e6e6e6;
  --gray-200: #ebebeb;
  --gray-100: #f2f2f2;
  --gray-alpha-100: #0000000d;
  --gray-alpha-200: #00000015;
  --gray-alpha-300: #0000001a;
  --gray-alpha-400: #00000014;
  --gray-alpha-500: #00000036;
  --gray-alpha-600: #0000003d;
  --gray-alpha-700: #00000070;
  --blue-100: #f0f7ff;
  --blue-300: #dfefff;
  --blue-700: #006bff;
  --green-100: #ecfdec;
  --green-700: #28a948;
  --amber-100: #fff6de;
  --amber-700: #ffae00;
  --background-100: #ffffff;
  --background-200: #fafafa;
  --ink: var(--gray-1000);
  --body: var(--gray-900);
  --muted: var(--gray-700);
  --hairline: var(--gray-alpha-200);
  --hairline-strong: var(--gray-alpha-400);
  --canvas: var(--background-100);
  --canvas-soft: var(--background-200);
  --canvas-soft-2: var(--gray-100);
  --blue: var(--blue-700);
  --radius-sm: 6px;
  --radius-md: 6px;
  --radius-lg: 12px;
  --shadow-soft: 0 2px 2px rgb(0 0 0 / 4%), inset 0 0 0 1px var(--gray-alpha-200);
  --shadow-float: 0 1px 1px rgb(0 0 0 / 2%), 0 4px 8px -4px rgb(0 0 0 / 4%),
    0 16px 24px -8px rgb(0 0 0 / 6%), inset 0 0 0 1px rgb(0 0 0 / 8%);
  --focus-ring: 0 0 0 2px var(--background-100), 0 0 0 4px var(--blue-700);
  font-family: "Geist Sans", Geist, Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  color: var(--ink);
  background: var(--background-100);
  font-feature-settings: "ss01", "ss02", "tnum";
}

html[lang="zh-Hans"] {
  font-family: "Noto Sans SC", "Geist Sans", Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

html[lang="zh-Hans"] .hardware-rows span,
html[lang="zh-Hans"] .panel-copy span,
html[lang="zh-Hans"] .readiness-card span {
  font-family: "Noto Sans SC", "Geist Sans", Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--background-100);
}

body.is-locked {
  overflow: hidden;
}

button,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

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

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

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

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

h1,
h2,
h3 {
  letter-spacing: 0;
}

p {
  color: var(--body);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  min-height: 64px;
  padding: 12px 24px;
  background: rgb(255 255 255 / 86%);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(16px);
  transition: border-color 150ms ease, background-color 150ms ease, box-shadow 150ms ease;
}

.site-header.is-elevated {
  border-bottom-color: var(--hairline);
  background: rgb(255 255 255 / 92%);
  box-shadow: 0 1px 0 rgb(0 0 0 / 2%);
}

.brand {
  display: inline-flex;
  align-items: center;
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  line-height: 20px;
}

.brand-logo {
  display: block;
  width: 108px;
  height: 24px;
}

.nav-links {
  display: flex;
  justify-content: center;
  gap: 8px;
}

.nav-links a {
  border-radius: var(--radius-sm);
  color: var(--body);
  font-size: 14px;
  line-height: 20px;
  padding: 8px 10px;
  transition: background-color 150ms ease, color 150ms ease;
}

.nav-links a:hover {
  background: var(--gray-alpha-100);
  color: var(--ink);
}

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.language-control select {
  height: 40px;
  min-width: 74px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  background: var(--canvas);
  color: var(--ink);
  padding: 0 12px;
  font-size: 14px;
  line-height: 20px;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  border-radius: var(--radius-sm);
  background: var(--ink);
  color: var(--canvas);
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
  padding: 0 10px;
  transition: background-color 150ms ease, box-shadow 150ms ease;
}

.nav-cta:hover {
  background: #000000;
  box-shadow: 0 2px 2px rgb(0 0 0 / 4%);
}

.hero {
  position: relative;
  isolation: isolate;
  min-height: 720px;
  display: grid;
  align-items: center;
  overflow: hidden;
  padding: 128px 24px 104px;
  background: var(--canvas);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -3;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 57% center;
}

.hero::before {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(90deg, rgb(255 255 255 / 96%) 0%, rgb(255 255 255 / 86%) 36%, rgb(255 255 255 / 42%) 66%, rgb(255 255 255 / 8%) 100%),
    linear-gradient(180deg, rgb(255 255 255 / 90%) 0%, rgb(255 255 255 / 10%) 42%, rgb(250 250 250 / 98%) 100%);
  content: "";
}

.hero::after {
  position: absolute;
  inset: auto 0 0;
  z-index: -1;
  height: 180px;
  background: linear-gradient(180deg, transparent, var(--canvas-soft));
  content: "";
}

.hero-content {
  width: min(100%, 760px);
  margin-left: max(0px, calc((100vw - 1200px) / 2));
}

.hero h1 {
  margin-bottom: 24px;
  color: var(--ink);
  font-size: 72px;
  font-weight: 600;
  line-height: 72px;
}

.hero p {
  max-width: 660px;
  margin-bottom: 32px;
  color: var(--gray-900);
  font-size: 20px;
  line-height: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 500;
  line-height: 24px;
  padding: 0 14px;
  transition: background-color 150ms ease, box-shadow 150ms ease;
}

.button:hover {
  box-shadow: 0 2px 2px rgb(0 0 0 / 4%);
}

.button-primary {
  background: var(--ink);
  color: var(--canvas);
  box-shadow: none;
}

.button-secondary {
  background: var(--background-100);
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--gray-alpha-400);
}

.hero-proof {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 20px;
  width: min(1152px, calc(100% - 48px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--gray-alpha-200);
  box-shadow: var(--shadow-float);
  backdrop-filter: blur(14px);
}

.hero-proof div {
  min-height: 84px;
  padding: 18px 20px;
  background: rgb(255 255 255 / 82%);
}

.hero-proof strong,
.hero-proof span {
  display: block;
}

.hero-proof strong {
  margin-bottom: 4px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 24px;
}

.hero-proof span {
  color: var(--body);
  font-size: 14px;
  line-height: 20px;
}

.section {
  padding: 96px 24px;
}

.section-header {
  width: min(760px, 100%);
  margin: 0 auto 44px;
  text-align: center;
}

.section h2 {
  margin-bottom: 16px;
  color: var(--ink);
  font-size: 40px;
  font-weight: 600;
  line-height: 48px;
}

.section-header p,
.stack-copy p,
.hardware-copy p,
.readiness-copy p {
  font-size: 18px;
  line-height: 28px;
}

.pillar-grid {
  width: min(1152px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.pillar-card {
  min-height: 260px;
  border-radius: var(--radius-md);
  background: var(--canvas);
  padding: 24px;
  box-shadow: var(--shadow-soft);
  transition: background-color 150ms ease, border-color 150ms ease, box-shadow 150ms ease;
}

.pillar-card:hover {
  background: var(--background-200);
  box-shadow: var(--shadow-float);
}

.pillar-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 28px;
  margin-bottom: 40px;
  border-radius: var(--radius-sm);
  background: var(--gray-100);
  color: var(--muted);
  font-family: "Geist Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  line-height: 16px;
}

.pillar-card h3 {
  margin-bottom: 10px;
  font-size: 20px;
  font-weight: 600;
  line-height: 30px;
}

.pillar-card p {
  margin-bottom: 0;
  font-size: 15px;
  line-height: 24px;
}

.stack-section {
  width: min(1248px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  align-items: center;
  gap: 48px;
}

.stack-copy,
.hardware-copy,
.readiness-copy {
  min-width: 0;
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 28px;
  color: var(--body);
  font-size: 15px;
  line-height: 24px;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--blue-700);
  content: "";
}

.platform-visual {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--canvas);
  box-shadow: var(--shadow-soft);
}

.platform-visual img {
  width: 100%;
  aspect-ratio: 1717 / 916;
  object-fit: cover;
}

.metric-strip {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 16px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--gray-alpha-200);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(14px);
}

.metric-strip span {
  min-height: 74px;
  padding: 14px;
  background: rgb(255 255 255 / 86%);
}

.metric-strip strong,
.metric-strip em {
  display: block;
  font-style: normal;
}

.metric-strip strong {
  margin-bottom: 2px;
  font-size: 20px;
  font-weight: 600;
  line-height: 28px;
}

.metric-strip em {
  color: var(--body);
  font-size: 12px;
  line-height: 16px;
}

.hardware-section {
  width: min(1248px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  align-items: center;
  gap: 56px;
}

.hardware-visual {
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--canvas);
  box-shadow: var(--shadow-soft);
}

.hardware-visual img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  transition: transform 300ms cubic-bezier(0.175, 0.885, 0.32, 1.1);
}

.hardware-rows {
  display: grid;
  gap: 1px;
  overflow: hidden;
  margin-top: 32px;
  border-radius: var(--radius-md);
  background: var(--gray-alpha-200);
  box-shadow: var(--shadow-soft);
}

.hardware-rows div {
  display: grid;
  gap: 4px;
  background: var(--canvas);
  padding: 18px 20px;
}

.hardware-rows span {
  color: var(--muted);
  font-family: "Geist Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  line-height: 18px;
}

.hardware-rows strong {
  color: var(--ink);
  font-size: 15px;
  font-weight: 500;
  line-height: 22px;
}

.evidence-section {
  background: var(--background-200);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.workbench-shell {
  width: min(1120px, 100%);
  margin: 0 auto;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--canvas);
  box-shadow: var(--shadow-float);
}

.workbench-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--gray-alpha-200);
}

.tab-button {
  min-height: 56px;
  border: 0;
  background: var(--canvas);
  color: var(--body);
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
  transition: color 150ms ease, background-color 150ms ease, box-shadow 150ms ease;
}

.tab-button:hover,
.tab-button.is-active {
  background: var(--background-200);
  color: var(--ink);
}

.tab-button.is-active {
  box-shadow: inset 0 -2px 0 var(--blue-700);
}

.workbench-panel {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 32px;
  min-height: 340px;
  padding: 36px;
}

.panel-copy span {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--muted);
  font-family: "Geist Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  line-height: 16px;
}

.panel-copy h3 {
  max-width: 620px;
  margin-bottom: 14px;
  font-size: 32px;
  font-weight: 600;
  line-height: 40px;
}

.panel-copy p {
  max-width: 650px;
  margin-bottom: 0;
  font-size: 17px;
  line-height: 28px;
}

.signal-board {
  align-self: stretch;
  display: grid;
  gap: 10px;
  padding: 18px;
  border-radius: var(--radius-md);
  background: var(--background-200);
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--gray-alpha-200);
}

.signal-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 78px;
  border-radius: var(--radius-md);
  background: var(--background-100);
  padding: 16px;
  box-shadow: inset 0 0 0 1px var(--gray-alpha-200);
}

.signal-line span {
  color: var(--gray-900);
  font-size: 14px;
  line-height: 20px;
}

.signal-line strong {
  color: var(--gray-1000);
  font-size: 15px;
  font-weight: 500;
  line-height: 22px;
  text-align: right;
}

.readiness-section {
  width: min(1160px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: start;
}

.readiness-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.readiness-card {
  min-height: 154px;
  border-radius: var(--radius-md);
  background: var(--canvas);
  padding: 20px;
  box-shadow: var(--shadow-soft);
  transition: background-color 150ms ease, box-shadow 150ms ease;
}

.readiness-card:hover {
  background: var(--background-200);
  box-shadow: var(--shadow-float);
}

.readiness-card span,
.readiness-card strong {
  display: block;
}

.readiness-card span {
  margin-bottom: 24px;
  color: var(--muted);
  font-family: "Geist Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  line-height: 16px;
}

.readiness-card strong {
  color: var(--ink);
  font-size: 19px;
  font-weight: 600;
  line-height: 27px;
}

.site-footer {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--hairline);
  background: var(--canvas);
  padding: 44px 24px;
}

.site-footer > div,
.site-footer > a {
  width: min(560px, 100%);
}

.footer-brand {
  margin-bottom: 12px;
}

.site-footer p {
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
}

.site-footer > a {
  color: var(--body);
  font-size: 14px;
  line-height: 20px;
  text-align: right;
}

/* ─────────────────────────────────────────────────────
   Scroll-reveal animation system
   ───────────────────────────────────────────────────── */

/* Base reveal: fade + slide-up (default) */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 600ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translate(0) scale(1);
}

/* Directional variants */
.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition:
    opacity 650ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 650ms cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition:
    opacity 650ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 650ms cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-left.is-visible,
.reveal-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Scale-up for images and visual blocks */
.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition:
    opacity 700ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 700ms cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-scale.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger delays applied via CSS custom property --stagger-i */
.reveal[style*="--stagger-i"],
.reveal-left[style*="--stagger-i"],
.reveal-right[style*="--stagger-i"],
.reveal-scale[style*="--stagger-i"] {
  transition-delay: calc(var(--stagger-i, 0) * 100ms);
}

/* ─── Hero-specific animations ──────────────────────── */

/* Hero title: dramatic type-in feel */
.hero-content.is-visible h1 {
  animation: hero-title-in 800ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes hero-title-in {
  from { opacity: 0; transform: translateY(30px); filter: blur(4px); }
  to   { opacity: 1; transform: translateY(0);    filter: blur(0); }
}

/* Hero proof bar: slide-up + stagger children */
.hero-proof.is-visible > div {
  animation: proof-slide-in 500ms cubic-bezier(0.16, 1, 0.3, 1) both;
}
.hero-proof.is-visible > div:nth-child(1) { animation-delay: 200ms; }
.hero-proof.is-visible > div:nth-child(2) { animation-delay: 350ms; }
.hero-proof.is-visible > div:nth-child(3) { animation-delay: 500ms; }

@keyframes proof-slide-in {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Glowing accent pulse on hero proof bar */
.hero-proof.is-visible {
  animation: glow-pulse 3s ease-in-out 1.2s infinite alternate;
}

@keyframes glow-pulse {
  0%   { box-shadow: var(--shadow-float); }
  100% { box-shadow: var(--shadow-float), 0 0 20px rgb(0 107 255 / 8%), 0 0 40px rgb(0 107 255 / 4%); }
}

/* ─── Pillar cards: stagger + lift ──────────────────── */

.pillar-card.reveal {
  transform: translateY(32px);
}

.pillar-card.is-visible .pillar-index {
  animation: index-pop 400ms cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes index-pop {
  from { opacity: 0; transform: scale(0.6); }
  to   { opacity: 1; transform: scale(1); }
}

/* ─── Check-list items: sequential entrance ─────────── */

.check-list li {
  opacity: 0;
  transform: translateX(-14px);
  transition:
    opacity 450ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 450ms cubic-bezier(0.16, 1, 0.3, 1);
}

.check-list li::before {
  transform: scale(0);
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.check-list.is-staggered li {
  opacity: 1;
  transform: translateX(0);
}

.check-list.is-staggered li::before {
  transform: scale(1);
}

.check-list li:nth-child(1) { transition-delay: 0ms; }
.check-list li:nth-child(2) { transition-delay: 80ms; }
.check-list li:nth-child(3) { transition-delay: 160ms; }
.check-list li:nth-child(4) { transition-delay: 240ms; }
.check-list li:nth-child(1)::before { transition-delay: 150ms; }
.check-list li:nth-child(2)::before { transition-delay: 230ms; }
.check-list li:nth-child(3)::before { transition-delay: 310ms; }
.check-list li:nth-child(4)::before { transition-delay: 390ms; }

/* ─── Platform visual: image shimmer on reveal ──────── */

.platform-visual.reveal-scale::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    transparent 40%,
    rgb(255 255 255 / 18%) 50%,
    transparent 60%
  );
  transform: translateX(-100%);
  pointer-events: none;
}

.platform-visual.reveal-scale.is-visible::after {
  animation: shimmer 1s 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes shimmer {
  to { transform: translateX(100%); }
}

/* ─── Metric strip: counter-up style pop ────────────── */

.metric-strip span {
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity 400ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

.metric-strip.is-staggered span {
  opacity: 1;
  transform: translateY(0);
}

.metric-strip span:nth-child(1) { transition-delay: 100ms; }
.metric-strip span:nth-child(2) { transition-delay: 250ms; }
.metric-strip span:nth-child(3) { transition-delay: 400ms; }

/* ─── Hardware visual: parallax float ───────────────── */

.hardware-visual img {
  transition: transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

.hardware-visual.reveal-scale.is-visible img {
  animation: float-up 800ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes float-up {
  from { opacity: 0.6; transform: scale(1.06) translateY(12px); }
  to   { opacity: 1;   transform: scale(1) translateY(0); }
}

/* ─── Hardware rows: sequential wipe ────────────────── */

.hardware-rows > div {
  opacity: 0;
  transform: translateX(-16px);
  transition:
    opacity 400ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

.hardware-rows.is-staggered > div {
  opacity: 1;
  transform: translateX(0);
}

.hardware-rows > div:nth-child(1) { transition-delay: 0ms; }
.hardware-rows > div:nth-child(2) { transition-delay: 120ms; }
.hardware-rows > div:nth-child(3) { transition-delay: 240ms; }

/* ─── Workbench: slide-up with shadow ramp ──────────── */

.workbench-shell.reveal {
  transform: translateY(36px);
  box-shadow: none;
}

.workbench-shell.reveal.is-visible {
  box-shadow: var(--shadow-float);
  transition:
    opacity 700ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 700ms cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 700ms 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Tab buttons shimmer in */
.workbench-shell.is-visible .tab-button {
  animation: tab-slide 350ms cubic-bezier(0.16, 1, 0.3, 1) both;
}
.workbench-shell.is-visible .tab-button:nth-child(1) { animation-delay: 200ms; }
.workbench-shell.is-visible .tab-button:nth-child(2) { animation-delay: 280ms; }
.workbench-shell.is-visible .tab-button:nth-child(3) { animation-delay: 360ms; }
.workbench-shell.is-visible .tab-button:nth-child(4) { animation-delay: 440ms; }

@keyframes tab-slide {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Signal lines: sequential pulse */
.workbench-shell.is-visible .signal-line {
  animation: signal-pop 400ms cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
.workbench-shell.is-visible .signal-line:nth-child(1) { animation-delay: 500ms; }
.workbench-shell.is-visible .signal-line:nth-child(2) { animation-delay: 650ms; }
.workbench-shell.is-visible .signal-line:nth-child(3) { animation-delay: 800ms; }

@keyframes signal-pop {
  from { opacity: 0; transform: scale(0.95) translateX(10px); }
  to   { opacity: 1; transform: scale(1) translateX(0); }
}

/* ─── Readiness cards: cascade grid ─────────────────── */

.readiness-card {
  opacity: 0;
  transform: translateY(20px) scale(0.97);
  transition:
    opacity 450ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 450ms cubic-bezier(0.16, 1, 0.3, 1),
    background-color 150ms ease,
    box-shadow 150ms ease;
}

.readiness-grid.is-staggered .readiness-card {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.readiness-card:nth-child(1) { transition-delay: 0ms; }
.readiness-card:nth-child(2) { transition-delay: 100ms; }
.readiness-card:nth-child(3) { transition-delay: 200ms; }
.readiness-card:nth-child(4) { transition-delay: 300ms; }

/* ─── Footer: subtle entrance ───────────────────────── */

.site-footer {
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity 500ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 500ms cubic-bezier(0.16, 1, 0.3, 1);
}

.site-footer.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Scroll-linked parallax depth ──────────────────── */

.parallax-layer {
  will-change: transform;
  transition: transform 50ms linear;
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .nav-links {
    display: none;
  }

  .hero {
    min-height: 720px;
    padding-top: 118px;
  }

  .hero h1 {
    font-size: 56px;
    line-height: 60px;
  }

  .pillar-grid,
  .stack-section,
  .hardware-section,
  .readiness-section,
  .workbench-panel {
    grid-template-columns: 1fr;
  }

  .hardware-section .hardware-visual {
    order: 2;
  }

  .workbench-panel {
    gap: 22px;
  }

  .metric-strip {
    position: static;
    margin: 0 12px 12px;
  }
}

@media (max-width: 680px) {
  .site-header {
    gap: 12px;
    min-height: 62px;
    padding: 10px 14px;
  }

  .brand {
    font-size: 14px;
  }

  .header-actions {
    gap: 6px;
  }

  .nav-cta {
    display: none;
  }

  .language-control select {
    min-width: 64px;
  }

  .hero {
    min-height: 690px;
    padding: 104px 16px 190px;
  }

  .hero-bg {
    object-position: 67% center;
  }

  .hero::before {
    background:
      linear-gradient(180deg, rgb(255 255 255 / 94%) 0%, rgb(255 255 255 / 72%) 42%, rgb(250 250 250 / 96%) 100%),
      linear-gradient(90deg, rgb(255 255 255 / 92%), rgb(255 255 255 / 36%));
  }

  .hero h1 {
    margin-bottom: 18px;
    font-size: 44px;
    line-height: 48px;
  }

  .hero p {
    font-size: 17px;
    line-height: 28px;
  }

  .button {
    width: 100%;
    min-height: 46px;
    padding: 0 14px;
  }

  .hero-proof {
    left: 16px;
    right: 16px;
    bottom: 16px;
    width: auto;
    grid-template-columns: 1fr;
  }

  .hero-proof div {
    min-height: 62px;
    padding: 12px 14px;
  }

  .section {
    padding: 72px 16px;
  }

  .section h2 {
    font-size: 32px;
    line-height: 40px;
  }

  .section-header {
    margin-bottom: 28px;
    text-align: left;
  }

  .section-header p,
  .stack-copy p,
  .hardware-copy p,
  .readiness-copy p {
    font-size: 16px;
    line-height: 26px;
  }

  .pillar-card {
    min-height: auto;
    padding: 20px;
  }

  .pillar-index {
    margin-bottom: 24px;
  }

  .metric-strip,
  .workbench-nav,
  .readiness-grid {
    grid-template-columns: 1fr;
  }

  .metric-strip span {
    min-height: 62px;
  }

  .workbench-panel {
    padding: 22px;
  }

  .panel-copy h3 {
    font-size: 25px;
    line-height: 32px;
  }

  .panel-copy p {
    font-size: 15px;
    line-height: 24px;
  }

  .signal-line {
    min-height: 68px;
  }

  .site-footer {
    display: grid;
    padding: 36px 16px;
  }

  .site-footer > a {
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-delay: 0ms !important;
    transition-delay: 0ms !important;
  }

  .reveal,
  .reveal-left,
  .reveal-right,
  .reveal-scale,
  .site-footer,
  .check-list li,
  .metric-strip span,
  .hardware-rows > div,
  .readiness-card {
    opacity: 1;
    transform: none;
  }

  .check-list li::before {
    transform: scale(1);
  }
}