:root {
  color-scheme: light;
  --page: #f5f5f7;
  --page-muted: #ececef;
  --surface: #fbfbfd;
  --surface-raised: #fdfdff;
  --surface-tint: rgba(120, 120, 128, 0.08);
  --text: #1d1d1f;
  --text-secondary: #56565c;
  --text-tertiary: #65656b;
  --line: rgba(30, 30, 32, 0.12);
  --line-strong: rgba(30, 30, 32, 0.18);
  --accent: #0066cc;
  --accent-hover: #005bb8;
  --accent-soft: rgba(0, 102, 204, 0.1);
  --shadow: 0 22px 60px rgba(31, 35, 41, 0.11), 0 2px 8px rgba(31, 35, 41, 0.06);
  --shadow-soft: 0 10px 32px rgba(31, 35, 41, 0.08);
  --content: 1280px;
  --header-height: 64px;
  --panel-radius: 16px;
  --control-radius: 10px;
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #101113;
  --page-muted: #15171a;
  --surface: #1b1d20;
  --surface-raised: #202226;
  --surface-tint: rgba(235, 235, 245, 0.07);
  --text: #f5f5f7;
  --text-secondary: #b7b7bd;
  --text-tertiary: #96969d;
  --line: rgba(245, 245, 247, 0.12);
  --line-strong: rgba(245, 245, 247, 0.2);
  --accent: #0a84ff;
  --accent-hover: #2997ff;
  --accent-soft: rgba(10, 132, 255, 0.13);
  --shadow: 0 24px 70px rgba(1, 3, 6, 0.35), 0 2px 10px rgba(1, 3, 6, 0.25);
  --shadow-soft: 0 12px 36px rgba(1, 3, 6, 0.24);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --page: #101113;
    --page-muted: #15171a;
    --surface: #1b1d20;
    --surface-raised: #202226;
    --surface-tint: rgba(235, 235, 245, 0.07);
    --text: #f5f5f7;
    --text-secondary: #b7b7bd;
    --text-tertiary: #96969d;
    --line: rgba(245, 245, 247, 0.12);
    --line-strong: rgba(245, 245, 247, 0.2);
    --accent: #0a84ff;
    --accent-hover: #2997ff;
    --accent-soft: rgba(10, 132, 255, 0.13);
    --shadow: 0 24px 70px rgba(1, 3, 6, 0.35), 0 2px 10px rgba(1, 3, 6, 0.25);
    --shadow-soft: 0 12px 36px rgba(1, 3, 6, 0.24);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
  background: var(--page);
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: clip;
  background: var(--page);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

button,
a {
  font: inherit;
}

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

button {
  color: inherit;
}

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

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

section[id],
main[id] {
  scroll-margin-top: calc(var(--header-height) + 24px);
}

::selection {
  background: var(--accent-soft);
  color: var(--text);
}

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 9px 13px;
  border-radius: var(--control-radius);
  background: var(--text);
  color: var(--page);
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

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

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  height: var(--header-height);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--page) 82%, transparent);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  backdrop-filter: blur(24px) saturate(160%);
}

.nav-shell,
.hero-shell,
.rail-shell,
.section-shell,
.footer-shell {
  width: min(calc(100% - 64px), var(--content));
  margin-inline: auto;
}

.nav-shell {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto minmax(360px, 1fr);
  align-items: center;
  height: 100%;
  gap: 24px;
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  font-weight: 670;
  letter-spacing: -0.015em;
}

.brand-name-compact {
  display: none;
}

.brand-mark {
  position: relative;
  display: inline-grid;
  flex: 0 0 28px;
  width: 28px;
  height: 28px;
  place-items: center;
}

.brand-mark img {
  position: absolute;
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.logo-dark {
  display: none;
}

:root[data-theme="dark"] .logo-light {
  display: none;
}

:root[data-theme="dark"] .logo-dark {
  display: block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .logo-light {
    display: none;
  }

  :root:not([data-theme]) .logo-dark {
    display: block;
  }
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  white-space: nowrap;
}

.nav-links a,
.text-control {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 580;
  transition: color 140ms ease, background 140ms ease;
}

.nav-links a:hover,
.text-control:hover {
  color: var(--text);
}

.nav-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  min-width: 0;
  white-space: nowrap;
}

.text-control {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 10px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
}

.text-control:hover {
  background: var(--surface-tint);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 19px;
  border: 1px solid var(--accent);
  border-radius: var(--control-radius);
  background: var(--accent);
  color: #f7f9fc;
  font-size: 15px;
  font-weight: 650;
  line-height: 1.2;
  text-align: center;
  transition: background 140ms ease, border-color 140ms ease, transform 140ms ease;
}

.button:hover {
  border-color: var(--accent-hover);
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.button:active {
  transform: translateY(0);
}

.button-small {
  min-height: 36px;
  padding-inline: 14px;
  font-size: 14px;
}

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

.button-secondary:hover {
  border-color: var(--line-strong);
  background: var(--surface-tint);
}

.hero {
  position: relative;
  min-height: calc(100dvh - var(--header-height));
  display: grid;
  align-items: center;
  overflow: hidden;
  padding: clamp(64px, 8vh, 104px) 0;
}

.hero::before {
  position: absolute;
  z-index: -1;
  top: 4%;
  right: -10%;
  width: min(52vw, 760px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-soft), transparent 69%);
  content: "";
  filter: blur(10px);
}

.hero-shell {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  align-items: center;
  gap: clamp(40px, 6vw, 88px);
}

.hero-copy {
  position: relative;
  z-index: 2;
  min-width: 0;
}

.eyebrow,
.locality-mark {
  color: var(--accent);
  font-size: 13px;
  font-weight: 720;
  letter-spacing: 0.11em;
  line-height: 1.3;
  text-transform: uppercase;
}

.hero-title {
  margin-top: 18px;
  padding-bottom: 0.08em;
  font-size: clamp(50px, 5.25vw, 72px);
  font-weight: 720;
  letter-spacing: -0.062em;
  line-height: 1.04;
}

.hero-title span {
  display: block;
  width: fit-content;
  max-width: 100%;
  white-space: nowrap;
}

.accent-line {
  color: var(--accent);
}

.hero-summary {
  max-width: 560px;
  margin-top: 24px;
  color: var(--text-secondary);
  font-size: clamp(18px, 1.55vw, 21px);
  line-height: 1.52;
  letter-spacing: -0.015em;
}

.hero-actions,
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.hero-visual {
  min-width: 0;
}

.hero-image-frame {
  position: relative;
  width: min(100%, 624px);
  margin-inline: auto;
  overflow: hidden;
  aspect-ratio: 624 / 500;
  border-radius: var(--panel-radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-image-frame::after {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 1px rgba(245, 245, 247, 0.25);
  content: "";
  pointer-events: none;
}

.hero-image-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.capability-rail {
  border-block: 1px solid var(--line);
  background: var(--page-muted);
}

.rail-shell {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.rail-item {
  min-width: 0;
  padding: 25px 28px;
  border-left: 1px solid var(--line);
}

.rail-item:last-child {
  border-right: 1px solid var(--line);
}

.rail-item span,
.rail-item strong {
  display: block;
}

.rail-item span {
  color: var(--text-tertiary);
  font-size: 13px;
  font-weight: 570;
}

.rail-item strong {
  margin-top: 2px;
  color: var(--text);
  font-size: 18px;
  font-weight: 670;
  letter-spacing: -0.02em;
  overflow-wrap: anywhere;
}

.section-space {
  padding: clamp(96px, 11vw, 152px) 0;
}

.section-heading {
  display: block;
  max-width: 820px;
  margin-bottom: 52px;
}

.section-heading.narrow {
  display: block;
  max-width: 720px;
}

.section-heading.narrow p {
  margin-top: 18px;
}

.section-heading > p {
  max-width: 720px;
  margin-top: 18px;
}

.section-heading h2,
.audience-intro h2,
.workflow-intro h2,
.faq-intro h2,
.privacy-copy h2,
.download-shell h2 {
  padding-bottom: 0.08em;
  font-size: clamp(38px, 4.6vw, 64px);
  font-weight: 700;
  letter-spacing: -0.052em;
  line-height: 1.08;
}

.section-heading p,
.audience-intro p,
.workflow-intro p,
.faq-intro p,
.privacy-copy p,
.download-summary {
  color: var(--text-secondary);
  font-size: 18px;
  line-height: 1.6;
  letter-spacing: -0.01em;
}

.audience-section {
  background: var(--page);
}

.audience-shell {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(64px, 9vw, 132px);
}

.audience-intro {
  align-self: start;
}

.audience-intro p {
  max-width: 440px;
  margin-top: 20px;
}

.audience-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 32px;
}

.audience-item {
  padding: 28px 0 8px;
  border-top: 1px solid var(--line-strong);
}

.audience-item-primary {
  grid-column: 1 / -1;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--panel-radius);
  background: var(--accent-soft);
}

.audience-label {
  color: var(--accent-hover);
  font-size: 13px;
  font-weight: 680;
}

.audience-item h3 {
  max-width: 620px;
  margin-top: 12px;
  font-size: clamp(23px, 2.4vw, 34px);
  font-weight: 660;
  letter-spacing: -0.04em;
  line-height: 1.16;
}

.audience-item p:last-child {
  max-width: 610px;
  margin-top: 12px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.product-canvas {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--panel-radius);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.product-canvas img {
  width: 100%;
  height: auto;
}

.feature-section {
  background: var(--page-muted);
}

.feature-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  align-items: center;
  gap: clamp(52px, 8vw, 112px);
}

.feature-visual {
  width: min(100%, 624px);
  margin-inline: auto;
  overflow: hidden;
  aspect-ratio: 624 / 500;
  border-radius: var(--panel-radius);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.feature-visual img {
  display: block;
  width: 100%;
  height: auto;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 40px;
}

.feature-item {
  min-height: 180px;
  padding: 26px 0 30px;
  border-top: 1px solid var(--line-strong);
}

.feature-item h3,
.sequence-list h3 {
  padding-bottom: 0.06em;
  font-size: clamp(21px, 2vw, 28px);
  font-weight: 660;
  letter-spacing: -0.035em;
  line-height: 1.18;
}

.feature-item p,
.sequence-list p,
.privacy-facts p {
  margin-top: 10px;
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.55;
}

.language-display {
  display: block;
  margin-bottom: 18px;
  color: var(--accent);
  font-size: 15px;
  font-weight: 720;
  letter-spacing: 0.08em;
}

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

.workflow-section .section-shell {
  display: grid;
  grid-template-columns: minmax(280px, 0.75fr) minmax(0, 1.25fr);
  gap: clamp(64px, 10vw, 144px);
}

.workflow-intro {
  position: sticky;
  top: calc(var(--header-height) + 48px);
  align-self: start;
}

.workflow-intro p {
  margin-top: 20px;
}

.sequence-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: sequence;
}

.sequence-list li {
  position: relative;
  min-height: 190px;
  padding: 34px 0 40px 82px;
  border-top: 1px solid var(--line-strong);
  counter-increment: sequence;
}

.sequence-list li:last-child {
  border-bottom: 1px solid var(--line-strong);
}

.sequence-list li::before {
  position: absolute;
  top: 36px;
  left: 0;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--surface-tint);
  color: var(--accent);
  content: counter(sequence, decimal-leading-zero);
  font-size: 13px;
  font-weight: 700;
  line-height: 42px;
  text-align: center;
}

.faq-section {
  background: var(--page-muted);
}

.faq-shell {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(64px, 9vw, 132px);
}

.faq-intro {
  position: sticky;
  top: calc(var(--header-height) + 48px);
  align-self: start;
}

.faq-intro p {
  max-width: 460px;
  margin-top: 20px;
}

.inline-link {
  display: inline-block;
  margin-top: 20px;
  color: var(--accent);
  font-size: 15px;
  font-weight: 650;
}

.inline-link:hover {
  color: var(--accent-hover);
}

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

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

.faq-list summary {
  position: relative;
  padding: 25px 44px 25px 0;
  color: var(--text);
  cursor: pointer;
  font-size: clamp(19px, 1.8vw, 24px);
  font-weight: 640;
  letter-spacing: -0.025em;
  list-style: none;
}

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

.faq-list summary::after {
  position: absolute;
  top: 50%;
  right: 4px;
  color: var(--text-tertiary);
  content: "+";
  font-size: 26px;
  font-weight: 350;
  transform: translateY(-50%);
}

.faq-list details[open] summary::after {
  content: "×";
}

.faq-list details p {
  max-width: 700px;
  padding: 0 44px 26px 0;
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.65;
}

.faq-list code {
  padding: 2px 5px;
  border-radius: 5px;
  background: var(--surface-tint);
  color: var(--text);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 0.9em;
}

.privacy-section {
  border-block: 1px solid var(--line);
  background: var(--page-muted);
}

.privacy-shell {
  display: grid;
  grid-template-columns: minmax(140px, 0.4fr) minmax(300px, 1fr) minmax(300px, 0.9fr);
  align-items: start;
  gap: clamp(44px, 7vw, 96px);
}

.locality-mark {
  padding-top: 9px;
}

.privacy-copy p {
  margin-top: 20px;
}

.privacy-facts {
  border-top: 1px solid var(--line-strong);
}

.privacy-facts p {
  margin: 0;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.download-section {
  background: var(--page);
}

.download-shell {
  overflow: hidden;
  padding: clamp(48px, 7vw, 88px);
  border: 1px solid var(--line);
  border-radius: var(--panel-radius);
  background: var(--surface-raised);
  box-shadow: var(--shadow-soft);
}

.download-shell h2 {
  max-width: 820px;
  margin-top: 18px;
}

.download-summary {
  max-width: 700px;
  margin-top: 20px;
}

.release-requirements {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 760px;
  margin-top: 42px;
  border-block: 1px solid var(--line-strong);
}

.release-requirements span {
  padding: 18px 20px 18px 0;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 620;
}

.release-requirements span + span {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.release-note {
  max-width: 760px;
  margin-top: 22px;
  color: var(--text-tertiary);
  font-size: 13px;
  line-height: 1.55;
}

.site-footer {
  padding: 34px 0;
  border-top: 1px solid var(--line);
  background: var(--page-muted);
}

/* Long-form product guides */
.article-hero {
  padding: clamp(72px, 10vw, 128px) 0 clamp(56px, 7vw, 88px);
  border-bottom: 1px solid var(--line);
  background: var(--page);
}

.article-shell {
  width: min(calc(100% - 64px), 1120px);
  margin-inline: auto;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 34px;
  color: var(--text-tertiary);
  font-size: 13px;
}

.breadcrumbs a:hover {
  color: var(--text);
}

.article-hero h1 {
  max-width: 940px;
  margin-top: 18px;
  padding-bottom: 0.08em;
  font-size: clamp(44px, 6.4vw, 76px);
  font-weight: 710;
  letter-spacing: -0.06em;
  line-height: 1.04;
}

.article-lede {
  max-width: 760px;
  margin-top: 24px;
  color: var(--text-secondary);
  font-size: clamp(19px, 2vw, 23px);
  line-height: 1.55;
  letter-spacing: -0.015em;
}

.article-meta {
  margin-top: 22px;
  color: var(--text-tertiary);
  font-size: 13px;
}

.article-visual {
  margin-top: 48px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--panel-radius);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.article-body {
  padding: clamp(72px, 9vw, 116px) 0;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: clamp(64px, 9vw, 112px);
}

.article-main {
  min-width: 0;
}

.article-main section + section {
  margin-top: 72px;
}

.article-main h2 {
  padding-bottom: 0.08em;
  font-size: clamp(30px, 3.8vw, 46px);
  font-weight: 680;
  letter-spacing: -0.045em;
  line-height: 1.12;
}

.article-main h3 {
  margin-top: 32px;
  font-size: 22px;
  font-weight: 660;
  letter-spacing: -0.025em;
}

.article-main p,
.article-main li {
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.72;
}

.article-main p {
  margin-top: 18px;
}

.article-main ul,
.article-main ol {
  margin: 20px 0 0;
  padding-left: 24px;
}

.article-main li + li {
  margin-top: 9px;
}

.article-main strong {
  color: var(--text);
  font-weight: 660;
}

.article-main code {
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--surface-tint);
  color: var(--text);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

.article-callout {
  margin-top: 28px;
  padding: 24px 26px;
  border: 1px solid var(--line);
  border-radius: var(--panel-radius);
  background: var(--surface-raised);
}

.article-callout p:first-child {
  margin-top: 0;
}

.article-aside {
  position: sticky;
  top: calc(var(--header-height) + 36px);
  align-self: start;
  padding-top: 4px;
}

.article-aside strong {
  font-size: 13px;
  font-weight: 700;
}

.article-aside nav {
  display: grid;
  gap: 13px;
  margin-top: 16px;
  padding-top: 18px;
  border-top: 1px solid var(--line-strong);
}

.article-aside a {
  color: var(--text-secondary);
  font-size: 14px;
}

.article-aside a:hover {
  color: var(--accent);
}

.article-cta {
  margin-top: 80px;
  padding: clamp(32px, 5vw, 52px);
  border-radius: var(--panel-radius);
  background: var(--accent-soft);
}

.article-cta h2 {
  max-width: 720px;
}

.footer-shell {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) auto minmax(260px, 1fr);
  align-items: center;
  gap: 28px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 22px;
}

.footer-links a,
.footer-shell p {
  color: var(--text-secondary);
  font-size: 13px;
}

.footer-links a:hover {
  color: var(--text);
}

.footer-shell p {
  text-align: right;
}

html[lang="zh-CN"] .hero-title,
html[lang="zh-CN"] .section-heading h2,
html[lang="zh-CN"] .audience-intro h2,
html[lang="zh-CN"] .workflow-intro h2,
html[lang="zh-CN"] .faq-intro h2,
html[lang="zh-CN"] .privacy-copy h2,
html[lang="zh-CN"] .download-shell h2 {
  letter-spacing: -0.055em;
}

html[lang="zh-CN"] .hero-title {
  font-size: clamp(44px, 4.1vw, 58px);
}

@media (max-width: 1099px) {
  .nav-shell,
  .hero-shell,
  .rail-shell,
  .section-shell,
  .footer-shell {
    width: min(calc(100% - 48px), var(--content));
  }

  .nav-shell {
    grid-template-columns: minmax(200px, 1fr) auto;
  }

  .nav-links {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 72px 0 80px;
  }

  .hero-shell {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 30px;
  }

  .hero-title {
    font-size: clamp(40px, 5.2vw, 56px);
    letter-spacing: -0.057em;
  }

  html[lang="zh-CN"] .hero-title {
    font-size: clamp(38px, 4.8vw, 50px);
  }

  .hero-summary {
    font-size: 17px;
  }

  .hero-actions {
    align-items: stretch;
  }

  .hero-actions .button {
    flex: 1 1 190px;
  }

  .rail-item {
    padding-inline: 20px;
  }

  .feature-layout {
    gap: 48px;
  }

  .audience-shell,
  .faq-shell {
    gap: 56px;
  }

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

  .feature-item {
    min-height: 0;
  }

  .workflow-section .section-shell {
    gap: 64px;
  }

  .privacy-shell {
    grid-template-columns: minmax(260px, 1fr) minmax(280px, 0.9fr);
  }

  .locality-mark {
    grid-column: 1 / -1;
    padding-top: 0;
  }

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

  .footer-shell p {
    grid-column: 1 / -1;
    text-align: left;
  }

  .article-shell {
    width: min(calc(100% - 48px), 1120px);
  }
}

@media (max-width: 767px) {
  :root {
    --header-height: 60px;
  }

  .nav-shell,
  .hero-shell,
  .rail-shell,
  .section-shell,
  .footer-shell {
    width: min(calc(100% - 32px), var(--content));
  }

  .nav-shell {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
  }

  .brand-name-full {
    display: none;
  }

  .brand-name-compact {
    display: inline;
  }

  .nav-actions .button {
    display: none;
  }

  .text-control {
    padding-inline: 8px;
    font-size: 13px;
  }

  .hero {
    padding: 58px 0 64px;
  }

  .hero-shell {
    display: flex;
    flex-direction: column;
    grid-template-columns: 1fr;
    gap: 42px;
    min-width: 0;
    max-width: calc(100% - 32px);
  }

  .hero-copy {
    width: 100%;
  }

  .hero-title {
    font-size: clamp(40px, 12vw, 52px);
  }

  html[lang="zh-CN"] .hero-title {
    font-size: clamp(46px, 13vw, 58px);
  }

  .hero-title span {
    white-space: normal;
  }

  .hero-summary {
    margin-top: 20px;
    font-size: 17px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
    margin-top: 26px;
  }

  .hero-visual {
    width: 100%;
    max-width: 100%;
    margin-left: 0;
  }

  .hero-image-frame,
  .hero-image-frame img {
    width: min(100%, 624px);
    min-width: 0;
    max-width: 100%;
  }

  .rail-shell {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .rail-item {
    padding: 20px 16px;
    border-bottom: 1px solid var(--line);
  }

  .rail-item:nth-child(even) {
    border-right: 1px solid var(--line);
  }

  .rail-item:nth-child(n + 3) {
    border-bottom: 0;
  }

  .rail-item strong {
    font-size: 16px;
  }

  .section-space {
    padding: 84px 0;
  }

  .section-heading {
    display: block;
    margin-bottom: 34px;
  }

  .section-heading h2,
  .audience-intro h2,
  .workflow-intro h2,
  .faq-intro h2,
  .privacy-copy h2,
  .download-shell h2 {
    font-size: clamp(38px, 11vw, 48px);
    line-height: 1.1;
  }

  .section-heading p,
  .audience-intro p,
  .workflow-intro p,
  .faq-intro p,
  .privacy-copy p,
  .download-summary {
    margin-top: 16px;
    font-size: 17px;
  }

  .product-canvas {
    overflow-x: auto;
    overscroll-behavior-inline: contain;
  }

  .product-canvas img {
    width: 760px;
    max-width: none;
  }

  .feature-layout,
  .audience-shell,
  .workflow-section .section-shell,
  .faq-shell,
  .privacy-shell {
    grid-template-columns: 1fr;
  }

  .feature-layout {
    gap: 40px;
  }

  .audience-shell,
  .faq-shell {
    gap: 38px;
  }

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

  .audience-item-primary {
    grid-column: auto;
    padding: 26px 24px;
  }

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

  .feature-item {
    padding: 24px 0 26px;
  }

  .workflow-section .section-shell {
    gap: 38px;
  }

  .workflow-intro {
    position: static;
  }

  .faq-intro {
    position: static;
  }

  .faq-list summary {
    padding-block: 22px;
    font-size: 19px;
  }

  .sequence-list li {
    min-height: 0;
    padding: 26px 0 28px 64px;
  }

  .sequence-list li::before {
    top: 27px;
    width: 36px;
    height: 36px;
    line-height: 36px;
  }

  .privacy-shell {
    gap: 38px;
  }

  .locality-mark {
    grid-column: auto;
  }

  .download-shell {
    padding: 38px 24px;
  }

  .release-requirements {
    grid-template-columns: 1fr;
    margin-top: 32px;
  }

  .release-requirements span {
    padding: 15px 0;
  }

  .release-requirements span + span {
    padding-left: 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

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

  .footer-shell {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .footer-links {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .footer-shell p {
    grid-column: auto;
  }

  .article-shell {
    width: min(calc(100% - 32px), 1120px);
  }

  .article-hero {
    padding: 56px 0 48px;
  }

  .article-hero h1 {
    font-size: clamp(40px, 12vw, 54px);
  }

  .article-visual {
    margin-top: 36px;
  }

  .article-body {
    padding: 64px 0 80px;
  }

  .article-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .article-aside {
    display: none;
  }

  .article-main section + section {
    margin-top: 56px;
  }
}

@media (max-width: 370px) {
  .brand-name-full,
  .brand-name-compact {
    display: none;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header {
    background: var(--page);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
}