:root {
  color-scheme: light dark;
  --page: #ffffff;
  --band: #f5f5f7;
  --surface: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --accent: #145c3d;
  --accent-hover: #0e482f;
  --border: #d2d2d7;
  --header: rgb(255 255 255 / 82%);
  --footer: #1d1d1f;
  --footer-text: #f5f5f7;
  --shadow: 0 12px 34px rgb(0 0 0 / 10%);
  --gutter: 24px;
  --content-width: 1280px;
  --header-height: 52px;
}

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

html {
  background: var(--page);
  scroll-padding-top: calc(var(--header-height) + 16px);
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background: var(--page);
  color: var(--text);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
}

button,
input,
textarea,
select {
  font: inherit;
  letter-spacing: 0;
}

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

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 12px;
  padding: 8px 12px;
  border-radius: 4px;
  background: var(--text);
  color: var(--page);
  font-weight: 650;
  text-decoration: none;
  transform: translateY(-150%);
}

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

.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: sticky;
  z-index: 20;
  top: 0;
  min-height: var(--header-height);
  border-bottom: 1px solid rgb(0 0 0 / 8%);
  background: var(--header);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
}

.nav-shell {
  display: flex;
  width: min(100%, calc(var(--content-width) + (var(--gutter) * 2)));
  min-height: var(--header-height);
  padding-inline: var(--gutter);
  margin-inline: auto;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  flex: 0 0 auto;
  color: var(--text);
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
}

.site-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-menu a {
  color: var(--text);
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
}

.site-menu a:hover {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.nav-toggle::before,
.nav-toggle::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  content: "";
  transition: transform 180ms ease;
}

.nav-toggle::before {
  transform: translate(-50%, -4px);
}

.nav-toggle::after {
  transform: translate(-50%, 4px);
}

.nav-toggle[aria-expanded="true"]::before {
  transform: translate(-50%, 0) rotate(45deg);
}

.nav-toggle[aria-expanded="true"]::after {
  transform: translate(-50%, 0) rotate(-45deg);
}

.hero {
  display: flex;
  padding: 44px var(--gutter) 64px;
  align-items: center;
  flex-direction: column;
  justify-content: flex-start;
  background: var(--page);
  text-align: center;
}

.hero-copy {
  width: min(100%, 760px);
  flex: 0 0 auto;
  margin-inline: auto;
}

.eyebrow,
.step-number {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
}

h1,
h2,
p {
  overflow-wrap: break-word;
}

h1,
h2 {
  margin-block: 0;
  line-height: 1.08;
  letter-spacing: 0;
}

h1 {
  font-size: 72px;
  font-weight: 750;
}

h2 {
  font-size: 44px;
  font-weight: 700;
}

.hero-lede {
  max-width: 680px;
  margin: 18px auto 0;
  color: var(--muted);
  font-size: 22px;
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  margin-top: 26px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.service-note {
  max-width: 680px;
  margin: 18px auto 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.button {
  display: inline-flex;
  min-width: 112px;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 650;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition:
    background-color 180ms ease,
    border-color 180ms ease,
    color 180ms ease,
    transform 180ms ease;
}

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

.button-primary {
  background: var(--accent);
  color: #ffffff;
}

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

.button-secondary {
  border-color: var(--border);
  background: var(--surface);
  color: var(--text);
}

.button-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.product-shot,
.step figure {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin: 0;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.product-shot {
  width: min(100%, 960px);
  margin-top: 36px;
  flex: 0 0 auto;
}

.product-shot img,
.step figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  background: var(--surface);
  object-fit: contain;
}

.product-shot img {
  transform: scale(1.08);
  transform-origin: 85% center;
}

.step figure img {
  transform: scale(1.06);
}

#install figure img {
  transform-origin: 65% center;
}

#login figure img {
  transform-origin: center;
}

#translate figure img {
  transform-origin: 60% center;
}

.step {
  display: grid;
  padding: 96px max(var(--gutter), calc((100% - var(--content-width)) / 2));
  grid-template-columns: minmax(260px, 0.52fr) minmax(0, 1fr);
  align-items: center;
  gap: 52px;
}

#install,
#translate {
  background: var(--band);
}

#login {
  background: var(--page);
}

.step-copy {
  max-width: 440px;
}

.step-copy p:last-child,
.result p:last-child {
  margin: 20px 0 0;
  color: var(--muted);
}

.step-reverse .step-copy {
  order: 2;
}

.step-reverse figure {
  order: 1;
}

.step-reverse {
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.52fr);
}

.result {
  padding: 108px var(--gutter);
  background: var(--page);
  text-align: center;
}

.result > div {
  width: min(100%, 780px);
  margin-inline: auto;
}

footer {
  display: flex;
  padding: 38px max(var(--gutter), calc((100% - var(--content-width)) / 2));
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: var(--footer);
  color: var(--footer-text);
  font-size: 14px;
  line-height: 1.5;
}

footer p {
  margin: 0;
}

footer nav {
  display: flex;
  flex: 0 0 auto;
  gap: 22px;
}

footer a {
  color: inherit;
  text-underline-offset: 3px;
}

@media (min-width: 721px) and (max-width: 1100px) {
  .hero {
    padding-top: 36px;
    padding-bottom: 56px;
  }

  h1 {
    font-size: 60px;
  }

  .hero-lede {
    margin-top: 14px;
    font-size: 20px;
  }

  .hero-actions {
    margin-top: 18px;
  }
}

@media (max-width: 900px) {
  :root {
    --gutter: 20px;
  }

  .step {
    padding-block: 72px;
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
  }

  h2 {
    font-size: 38px;
  }

  .step-reverse {
    grid-template-columns: minmax(0, 1fr);
  }

  .step-reverse .step-copy,
  .step-reverse figure {
    order: initial;
  }

  .step-copy {
    max-width: none;
  }
}

@media (max-width: 720px) {
  :root {
    --gutter: 16px;
  }

  html:not(.nav-ready) {
    scroll-padding-top: 16px;
  }

  html:not(.nav-ready) .site-header {
    position: static;
  }

  .nav-shell {
    flex-wrap: wrap;
  }

  .site-menu {
    width: 100%;
    padding: 6px 0 16px;
    align-items: stretch;
    flex-direction: column;
    gap: 0;
  }

  .site-menu a {
    min-height: 44px;
    padding: 11px 0;
    font-size: 16px;
  }

  .js.nav-ready .nav-toggle {
    display: block;
  }

  .js.nav-ready .site-menu:not([data-open]) {
    display: none;
  }

  .hero {
    padding-top: 30px;
    padding-bottom: 48px;
  }

  h1 {
    font-size: 52px;
  }

  h2 {
    font-size: 34px;
  }

  .hero-lede {
    margin-top: 14px;
    font-size: 19px;
  }

  .hero-actions {
    margin-top: 22px;
  }

  .product-shot {
    width: 100%;
    margin-top: 28px;
  }

  .product-shot img {
    transform: scale(1.1);
  }

  .step figure img {
    transform: scale(1.08);
  }

  .step {
    padding-block: 64px;
    gap: 30px;
  }

  .result {
    padding-block: 72px;
  }

  footer {
    padding-block: 30px;
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 400px) {
  h1 {
    font-size: 44px;
  }

  h2 {
    font-size: 31px;
  }

  .hero-actions {
    width: 100%;
  }

  .button {
    min-width: 0;
    padding-inline: 18px;
    flex: 1 1 0;
  }
}

@media (max-width: 720px) and (max-height: 650px) {
  .hero {
    padding-top: 22px;
    padding-bottom: 20px;
  }

  .hero .eyebrow {
    margin-bottom: 4px;
  }

  .hero-lede {
    margin-top: 10px;
  }

  .hero-actions {
    margin-top: 14px;
  }

  .service-note {
    margin-top: 14px;
  }

  .product-shot {
    margin-top: 20px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #000000;
    --band: #1d1d1f;
    --surface: #161617;
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --accent: #66d4a1;
    --accent-hover: #83dfb4;
    --border: #424245;
    --header: rgb(0 0 0 / 82%);
    --footer: #0a0a0a;
    --footer-text: #f5f5f7;
    --shadow: 0 12px 34px rgb(0 0 0 / 34%);
  }

  .site-header {
    border-bottom-color: rgb(255 255 255 / 14%);
  }

  .button-primary {
    color: #081b12;
  }
}

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