:root {
  --canvas: #ffffff;
  --surface: #f7f7fa;
  --ink: #17161b;
  --muted: #62616a;
  --rule: #d9d8df;
  --violet: #7655d4;
  --violet-deep: #563aa1;
  --coral: #ef5a52;
  --orange: #df7100;
  --blue: #256bd8;
  --green: #177346;
  --green-bright: #0b8a4a;
  --header-height: 72px;
  --container: 1180px;
  --gutter: clamp(20px, 4vw, 64px);
  --section-space: clamp(72px, 8vw, 112px);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --font-sans: "Avenir Next", Avenir, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SFMono-Regular", "Cascadia Code", Consolas, monospace;
}

@supports (color: oklch(50% 0.1 200)) {
  :root {
    --canvas: oklch(100% 0 0);
    --surface: oklch(97.5% 0.004 285);
    --ink: oklch(18% 0.015 285);
    --muted: oklch(46% 0.015 285);
    --rule: oklch(87% 0.008 285);
    --violet: oklch(61% 0.19 292);
    --violet-deep: oklch(45% 0.18 292);
    --coral: oklch(67% 0.19 27);
    --orange: oklch(69% 0.17 55);
    --blue: oklch(58% 0.19 255);
    --green: oklch(48% 0.13 150);
    --green-bright: oklch(52% 0.16 150);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-padding-top: 20px;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.menu-open {
  overflow: hidden;
}

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

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

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

button {
  font: inherit;
}

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

h1,
h2,
h3 {
  color: var(--ink);
  font-weight: 650;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

h1 {
  margin-bottom: 28px;
  font-size: clamp(3.25rem, 4.6vw, 3.75rem);
  line-height: 1.02;
}

h2 {
  margin-bottom: 24px;
  font-size: clamp(2.25rem, 4vw, 3.25rem);
  line-height: 1.05;
}

h3 {
  margin-bottom: 10px;
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  line-height: 1.2;
}

p {
  color: var(--muted);
  text-wrap: pretty;
}

code {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

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

.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;
}

.skip-link {
  position: fixed;
  z-index: 30;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--canvas);
  transform: translateY(-150%);
  transition: transform 180ms var(--ease-out);
}

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

.section-inner,
.header-inner,
.hero-inner {
  width: min(var(--container), calc(100% - (var(--gutter) * 2)));
  margin-inline: auto;
}

.section {
  padding-block: var(--section-space);
}

.site-header {
  position: relative;
  z-index: 20;
  height: var(--header-height);
  background: var(--canvas);
  border-bottom: 1px solid var(--rule);
}

.header-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  height: 100%;
  gap: clamp(24px, 4vw, 60px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  text-decoration: none;
}

.brand-mark {
  position: relative;
  display: inline-block;
  width: 27px;
  height: 27px;
}

.brand-mark span {
  position: absolute;
  top: 1px;
  left: 12px;
  width: 2px;
  height: 25px;
  background: currentColor;
  transform-origin: center;
}

.brand-mark span:nth-child(1) {
  transform: rotate(45deg) translateX(-5px);
}

.brand-mark span:nth-child(2) {
  transform: rotate(-45deg);
}

.brand-mark span:nth-child(3) {
  transform: rotate(45deg) translateX(5px);
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: clamp(20px, 3vw, 44px);
}

.site-nav a,
.github-link,
.language-control {
  position: relative;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}

.site-nav a::after,
.github-link::after,
.language-control::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -7px;
  left: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms var(--ease-out);
}

.site-nav a:hover::after,
.github-link:hover::after,
.language-control:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

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

.language-control {
  padding: 5px 0;
}

.menu-toggle {
  display: none;
}

.hero {
  position: relative;
  overflow: clip;
  padding-top: clamp(44px, 6vw, 84px);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(460px, 1fr);
  align-items: start;
  min-height: min(650px, calc(100svh - var(--header-height) - 170px));
  gap: clamp(28px, 3vw, 58px);
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 620px;
}

.hero-lede {
  max-width: 56ch;
  margin-bottom: 30px;
  color: var(--ink);
  font-size: clamp(1.1rem, 1.8vw, 1.35rem);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 20px;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  transition: transform 180ms var(--ease-out), background-color 180ms var(--ease-out), color 180ms var(--ease-out);
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  border: 1px solid var(--green);
  background: var(--green);
  color: var(--canvas);
}

.button-primary:hover {
  background: var(--green-bright);
}

.button-secondary {
  border: 1px solid var(--ink);
  background: var(--canvas);
  color: var(--ink);
}

.button-secondary:hover {
  background: var(--surface);
}

.command-block {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
  padding: 14px 16px;
  border: 1px solid var(--rule);
  border-radius: 12px;
  background: var(--surface);
}

.command-block-hero {
  max-width: 610px;
}

.command-lines {
  display: grid;
  flex: 1;
  min-width: 0;
  gap: 10px;
}

.command-lines code + code {
  padding-top: 10px;
  border-top: 1px solid var(--rule);
}

.command-block code {
  min-width: 0;
  overflow-wrap: anywhere;
  color: var(--ink);
}

.copy-button {
  flex: none;
  padding: 7px 3px;
  border: 0;
  border-bottom: 1px solid var(--rule);
  background: transparent;
  color: var(--violet-deep);
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 180ms var(--ease-out), color 180ms var(--ease-out);
}

.copy-button:hover {
  border-color: currentColor;
  color: var(--ink);
}

.copy-button.is-copied {
  color: var(--green);
}

.hero-note {
  max-width: 58ch;
  margin: 14px 0 0;
  font-size: 0.82rem;
}

.hero-figure {
  position: relative;
  z-index: 1;
  width: min(720px, 58vw);
  margin: 0 -8vw 0 -4vw;
  animation: hero-settle 700ms var(--ease-out) both;
}

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

.thread-rule {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: min(var(--container), calc(100% - (var(--gutter) * 2)));
  height: 4px;
  margin: clamp(40px, 6vw, 72px) auto 0;
}

.thread-rule span:nth-child(1) { background: var(--coral); }
.thread-rule span:nth-child(2) { background: var(--orange); }
.thread-rule span:nth-child(3) { background: var(--blue); }
.thread-rule span:nth-child(4) { background: var(--green); }

.problem-section {
  padding-top: clamp(72px, 8vw, 110px);
  padding-bottom: 0;
}

html[data-lang="zh"] .hero-copy h1 {
  max-width: 9.2em;
  font-size: clamp(3.25rem, 4.4vw, 3.75rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.problem-intro,
.workflow-heading,
.workflows-heading,
.limits-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.7fr);
  align-items: end;
  gap: clamp(40px, 8vw, 120px);
}

.problem-intro p,
.workflow-heading p,
.workflows-heading p,
.limits-heading p {
  max-width: 52ch;
  margin-bottom: 28px;
  font-size: 1.1rem;
}

.failure-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: clamp(52px, 7vw, 92px);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--rule);
}

.failure-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  min-width: 0;
  padding: 28px clamp(18px, 2.4vw, 34px) 34px 0;
}

.failure-item + .failure-item {
  padding-left: clamp(18px, 2.4vw, 34px);
  border-left: 1px solid var(--rule);
}

.failure-item h3 {
  font-size: 1.2rem;
}

.failure-item p {
  max-width: 34ch;
  margin-bottom: 0;
}

.failure-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1.5px solid currentColor;
  border-radius: 50%;
  font-size: 1.25rem;
  line-height: 1;
}

.mark-coral { color: var(--coral); }
.mark-orange { color: var(--orange); }
.mark-blue { color: var(--blue); }

.missing-middle {
  margin-top: var(--section-space);
  padding-block: clamp(72px, 9vw, 118px);
  background: var(--surface);
}

.middle-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 40px;
  margin-bottom: clamp(48px, 6vw, 82px);
}

.middle-heading h2 {
  max-width: 760px;
  margin-bottom: 0;
}

.middle-heading p {
  max-width: 38ch;
  margin-bottom: 8px;
}

.decision-flow {
  display: grid;
  grid-template-columns: auto 1fr auto 1fr auto 1fr auto 1fr auto 1fr auto;
  align-items: center;
  gap: 10px;
  overflow-x: auto;
  padding: 6px 2px 18px;
}

.flow-node {
  display: grid;
  place-items: center;
  min-width: 116px;
  min-height: 78px;
  padding: 12px;
  border: 1px solid var(--rule);
  border-radius: 12px;
  background: var(--canvas);
  text-align: center;
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.3;
}

.flow-start { border-color: var(--coral); }
.flow-end { border-color: var(--green); }

.flow-line {
  min-width: 28px;
  height: 1px;
  background: var(--ink);
}

.workflow-section {
  background: var(--canvas);
}

.workflow-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.72fr) minmax(520px, 1.28fr);
  align-items: center;
  gap: clamp(48px, 7vw, 100px);
  margin-top: clamp(56px, 8vw, 104px);
}

.workflow-rail {
  position: relative;
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.workflow-rail::before {
  content: "";
  position: absolute;
  top: 28px;
  bottom: 28px;
  left: 19px;
  width: 1px;
  background: var(--rule);
}

.workflow-rail li {
  position: relative;
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 20px;
  padding: 0 0 30px;
}

.workflow-rail li:last-child {
  padding-bottom: 0;
}

.rail-index {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 2px solid currentColor;
  border-radius: 50%;
  background: var(--canvas);
  font-size: 0.9rem;
  font-weight: 750;
}

.workflow-rail h3 {
  margin: 5px 0 5px;
  font-size: 1.14rem;
}

.workflow-rail p {
  max-width: 45ch;
  margin: 0;
  font-size: 0.95rem;
}

.rail-coral { color: var(--coral); }
.rail-orange { color: var(--orange); }
.rail-violet { color: var(--violet); }
.rail-blue { color: var(--blue); }
.rail-green { color: var(--green); }

.workflow-rail h3,
.workflow-rail p {
  color: var(--ink);
}

.workflow-rail p {
  color: var(--muted);
}

.workflow-figure {
  margin: 0;
}

.workflow-figure img {
  width: 100%;
  height: auto;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.workflow-figure figcaption {
  max-width: 62ch;
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.82rem;
}

.workflows-section {
  padding-top: 0;
}

.workflow-choices {
  display: grid;
  grid-auto-rows: 1fr;
  margin-top: clamp(54px, 7vw, 92px);
  border-top: 1px solid var(--ink);
}

.workflow-choice {
  display: grid;
  grid-template-columns: minmax(210px, 0.8fr) minmax(260px, 1fr) minmax(280px, 1.15fr);
  align-items: center;
  gap: 28px;
  padding: 26px 0;
  border-bottom: 1px solid var(--rule);
  transition: background-color 180ms var(--ease-out);
}

.workflow-choice:hover {
  background: var(--surface);
}

.choice-name {
  display: flex;
  align-items: center;
  gap: 14px;
}

.choice-name h3 {
  margin: 0;
  font-size: 1.16rem;
}

.choice-mark {
  width: 12px;
  height: 12px;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.workflow-choice code {
  color: var(--ink);
  font-size: 0.82rem;
  overflow-wrap: anywhere;
}

.workflow-choice p {
  margin: 0;
}

.optional-line,
.case-link,
.setup-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 28px;
}

.optional-line p {
  margin: 0;
}

.optional-line code {
  margin-inline: 5px;
  color: var(--ink);
}

.optional-line a,
.case-link a,
.setup-note a,
.docs-links a,
.footer-links a {
  color: var(--violet-deep);
  font-weight: 700;
  text-decoration: underline;
}

.evidence-section {
  background: var(--ink);
  color: var(--canvas);
}

.evidence-section h2,
.evidence-section h3,
.evidence-section p {
  color: var(--canvas);
}

.evidence-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.55fr);
  align-items: end;
  gap: clamp(44px, 8vw, 120px);
}

.evidence-heading h2 {
  max-width: 820px;
}

.evidence-heading p {
  max-width: 48ch;
  margin-bottom: 26px;
  color: color-mix(in oklab, var(--canvas) 70%, transparent);
  font-size: 1.08rem;
}

.evidence-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: clamp(52px, 7vw, 88px);
  border-top: 1px solid color-mix(in oklab, var(--canvas) 34%, transparent);
}

.evidence-points article {
  min-height: 240px;
  padding: 34px clamp(22px, 3vw, 42px) 20px 0;
}

.evidence-points article + article {
  padding-left: clamp(22px, 3vw, 42px);
  border-left: 1px solid color-mix(in oklab, var(--canvas) 22%, transparent);
}

.evidence-points h3 {
  max-width: 20ch;
  margin-top: 26px;
  font-size: 1.35rem;
}

.evidence-points p {
  max-width: 38ch;
  color: color-mix(in oklab, var(--canvas) 68%, transparent);
}

.evidence-symbol {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 2px solid currentColor;
  border-radius: 50%;
  font-size: 1.35rem;
}

.symbol-coral { color: var(--coral); }
.symbol-blue { color: #4e91ff; }
.symbol-green { color: #4fc985; }

.case-link {
  padding-top: 30px;
  border-top: 1px solid color-mix(in oklab, var(--canvas) 22%, transparent);
}

.case-link p {
  max-width: 68ch;
  margin: 0;
  color: color-mix(in oklab, var(--canvas) 72%, transparent);
}

.case-link a {
  flex: none;
  color: var(--canvas);
}

.install-section {
  padding-bottom: clamp(72px, 9vw, 112px);
}

.install-layout {
  display: grid;
  grid-template-columns: minmax(240px, 0.55fr) minmax(540px, 1.2fr);
  align-items: start;
  gap: clamp(56px, 9vw, 140px);
}

.install-copy {
  position: static;
}

.install-copy p {
  max-width: 36ch;
  font-size: 1.05rem;
}

.install-steps {
  display: grid;
}

.install-step {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 24px;
  padding-bottom: 42px;
}

.install-step:not(:last-child) .install-number::after {
  content: "";
  position: absolute;
  top: 48px;
  bottom: -42px;
  left: 23px;
  width: 1px;
  background: var(--rule);
}

.install-number {
  position: relative;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 2px solid currentColor;
  border-radius: 50%;
  color: var(--coral);
  font-weight: 750;
}

.install-step:nth-child(2) .install-number { color: var(--orange); }
.install-step:nth-child(3) .install-number { color: var(--blue); }

.install-step h3 {
  margin: 8px 0 16px;
  font-size: 1.2rem;
}

.install-step .command-block {
  width: 100%;
}

.install-step .command-block code {
  flex: 1;
}

.prompt-block {
  padding: 18px;
  border: 1px solid var(--ink);
  border-radius: 12px;
  background: var(--canvas);
}

.prompt-block code {
  color: var(--ink);
  overflow-wrap: anywhere;
}

.prompt-block code span:first-child {
  color: var(--violet-deep);
}

.setup-note {
  margin-top: clamp(46px, 7vw, 84px);
  padding-top: 28px;
  border-top: 1px solid var(--rule);
}

.setup-note h3 {
  margin-bottom: 6px;
  font-size: 1.15rem;
}

.setup-note p {
  max-width: 70ch;
  margin: 0;
}

.limits-section {
  padding-top: clamp(72px, 9vw, 112px);
  background: var(--surface);
}

.limits-layout {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin-top: clamp(52px, 7vw, 88px);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--rule);
}

.limits-column {
  padding: 30px clamp(24px, 4vw, 58px) 38px 0;
}

.limits-column + .limits-column {
  padding-right: 0;
  padding-left: clamp(24px, 4vw, 58px);
  border-left: 1px solid var(--rule);
}

.limits-column h3 {
  padding-bottom: 16px;
  border-bottom: 2px solid var(--green);
  color: var(--green);
}

.limits-column + .limits-column h3 {
  border-color: var(--coral);
  color: var(--coral);
}

.limits-column ul {
  display: grid;
  gap: 16px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.limits-column li {
  position: relative;
  padding-left: 30px;
}

.limits-column li::before {
  content: "✓";
  position: absolute;
  top: 1px;
  left: 0;
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border: 1px solid var(--green);
  border-radius: 50%;
  color: var(--green);
  font-size: 0.75rem;
}

.limits-column + .limits-column li::before {
  content: "×";
  border-color: var(--coral);
  color: var(--coral);
}

.docs-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 34px;
  margin-top: 32px;
}

.site-footer {
  padding-block: 46px;
  background: var(--surface);
  border-top: 1px solid var(--rule);
}

.footer-inner {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 40px;
}

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

.footer-inner p {
  margin: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}

.copy-status {
  position: fixed;
  z-index: 40;
  right: 20px;
  bottom: 20px;
  max-width: min(320px, calc(100vw - 40px));
  padding: 12px 16px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--canvas);
  font-size: 0.88rem;
  font-weight: 650;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 180ms var(--ease-out), transform 180ms var(--ease-out);
}

.copy-status.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes hero-settle {
  from {
    opacity: 0.86;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1020px) {
  .site-nav {
    gap: 20px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(390px, 0.9fr);
  }

  .hero-figure {
    width: min(620px, 58vw);
    margin-right: -15vw;
  }

  .workflow-layout {
    grid-template-columns: minmax(280px, 0.8fr) minmax(420px, 1.2fr);
    gap: 42px;
  }

  .workflow-choice {
    grid-template-columns: minmax(190px, 0.8fr) minmax(230px, 1fr) minmax(230px, 1fr);
  }
}

@media (max-width: 820px) {
  :root {
    --header-height: 64px;
  }

  .header-inner {
    grid-template-columns: auto 1fr auto;
  }

  .menu-toggle {
    position: relative;
    display: grid;
    justify-self: end;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
  }

  .menu-toggle > span:not(.sr-only) {
    position: absolute;
    left: 9px;
    width: 24px;
    height: 2px;
    background: var(--ink);
    transition: transform 180ms var(--ease-out), top 180ms var(--ease-out);
  }

  .menu-toggle > span:first-child { top: 15px; }
  .menu-toggle > span:nth-child(2) { top: 25px; }

  .menu-toggle[aria-expanded="true"] > span:first-child {
    top: 20px;
    transform: rotate(45deg);
  }

  .menu-toggle[aria-expanded="true"] > span:nth-child(2) {
    top: 20px;
    transform: rotate(-45deg);
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    right: 0;
    bottom: 0;
    left: 0;
    display: grid;
    align-content: start;
    gap: 0;
    padding: 28px var(--gutter);
    background: var(--canvas);
    transform: translateX(100%);
    transition: transform 240ms var(--ease-out);
  }

  .site-nav.is-open {
    transform: translateX(0);
  }

  .site-nav a {
    padding: 18px 0;
    border-bottom: 1px solid var(--rule);
    font-size: 1.25rem;
  }

  .header-actions .github-link {
    display: none;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 16px;
  }

  .hero-copy {
    max-width: 690px;
  }

  .hero-figure {
    width: 100%;
    margin: 12px 0 0;
  }

  .problem-intro,
  .workflow-heading,
  .workflows-heading,
  .limits-heading,
  .evidence-heading {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .failure-list,
  .evidence-points {
    grid-template-columns: 1fr;
  }

  .failure-item,
  .failure-item + .failure-item,
  .evidence-points article,
  .evidence-points article + article {
    padding: 26px 0;
    border-left: 0;
  }

  .failure-item + .failure-item,
  .evidence-points article + article {
    border-top: 1px solid var(--rule);
  }

  .evidence-points article + article {
    border-color: color-mix(in oklab, var(--canvas) 22%, transparent);
  }

  .middle-heading {
    display: grid;
    gap: 18px;
  }

  .workflow-layout {
    grid-template-columns: 1fr;
  }

  .workflow-figure {
    grid-row: 1;
  }

  .workflow-choices {
    grid-auto-rows: auto;
  }

  .workflow-choice {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .install-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .install-copy {
    position: static;
  }
}

@media (max-width: 620px) {
  :root {
    --gutter: 20px;
  }

  h1 {
    font-size: clamp(2.9rem, 14vw, 4.25rem);
    letter-spacing: -0.035em;
  }

  h2 {
    font-size: clamp(2.15rem, 10vw, 3rem);
  }

  .brand {
    font-size: 1.08rem;
  }

  .brand-mark {
    width: 23px;
    height: 23px;
  }

  .brand-mark span {
    top: 1px;
    left: 10px;
    height: 21px;
  }

  .header-actions {
    gap: 12px;
  }

  .language-control {
    font-size: 0.82rem;
  }

  .hero {
    padding-top: 36px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .command-block,
  .command-block-hero {
    align-items: stretch;
    flex-direction: column;
  }

  .copy-button {
    align-self: flex-start;
  }

  .hero-figure {
    width: calc(100% + 28px);
    margin-left: -14px;
  }

  .decision-flow {
    margin-right: calc(var(--gutter) * -1);
  }

  .optional-line,
  .case-link,
  .setup-note,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .evidence-points article {
    min-height: 0;
  }

  .install-step {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 16px;
  }

  .install-number {
    width: 42px;
    height: 42px;
  }

  .install-step:not(:last-child) .install-number::after {
    top: 42px;
    left: 20px;
  }

  .limits-layout {
    grid-template-columns: 1fr;
  }

  .limits-column,
  .limits-column + .limits-column {
    padding: 28px 0;
    border-left: 0;
  }

  .limits-column + .limits-column {
    border-top: 1px solid var(--rule);
  }

  .footer-links {
    gap: 16px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}