:root {
  color-scheme: light dark;
  --background: #ffffff;
  --foreground: #09090b;
  --muted: #71717a;
  --subtle: #fafafa;
  --border: #e4e4e7;
  --primary: #0060df;
  --button: #0060df;
  --button-hover: #004fb8;
  --danger: #c81e1e;
  --header: #ffffff;
  --radius: 8px;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #1d1d20;
    --foreground: #fafafa;
    --muted: #a1a1aa;
    --subtle: #232327;
    --border: #3a3a40;
    --primary: #409cff;
    --button: #0060df;
    --button-hover: #004fb8;
    --danger: #ff8a8a;
    --header: #1d1d20;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--background);
  color: var(--foreground);
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

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

.container {
  width: min(1080px, calc(100% - 48px));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 8px 12px;
  border-radius: var(--radius);
  background: var(--foreground);
  color: var(--background);
  transform: translateY(-160%);
}

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

:focus-visible {
  outline: 3px solid #0a84ff;
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--border);
  background: var(--header);
}

.header-inner {
  display: flex;
  min-height: 64px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.header-action {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 6px 13px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--background);
  font-size: 14px;
  font-weight: 600;
  transition:
    border-color 120ms ease,
    background-color 120ms ease;
}

.header-action:hover {
  border-color: var(--muted);
  background: var(--subtle);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(48px, 9vw, 120px);
  min-height: 560px;
  padding-block: 88px;
}

.hero-copy {
  max-width: 720px;
}

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
}

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--foreground);
}

h1 {
  margin-bottom: 28px;
  letter-spacing: -0.045em;
  line-height: 1.08;
}

.product-name,
.slogan {
  display: block;
}

.product-name {
  font-size: clamp(52px, 7vw, 76px);
  font-weight: 740;
}

.slogan {
  margin-top: 16px;
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 650;
  letter-spacing: -0.035em;
}

.lead {
  max-width: 680px;
  margin: 0 0 30px;
  color: var(--muted);
  font-size: clamp(17px, 1.8vw, 20px);
  line-height: 1.75;
}

.primary-action,
.download-button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--button);
  border-radius: var(--radius);
  background: var(--button);
  color: #ffffff;
  font-weight: 650;
  cursor: pointer;
  transition:
    background-color 120ms ease,
    border-color 120ms ease,
    opacity 120ms ease;
}

.primary-action {
  padding: 9px 18px;
}

.primary-action:hover,
.download-button:hover:not([aria-disabled="true"]) {
  border-color: var(--button-hover);
  background: var(--button-hover);
}

.primary-action:active,
.download-button:active:not([aria-disabled="true"]) {
  transform: translateY(1px);
}

.compatibility {
  margin: 17px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.hero-logo {
  width: clamp(112px, 14vw, 160px);
  height: auto;
  border-radius: 15%;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.download-section {
  border-block: 1px solid var(--border);
  background: var(--subtle);
  padding-block: 76px;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 32px;
  margin-bottom: 32px;
}

.section-heading h2,
.about h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.section-heading > p {
  margin: 0 0 3px;
  color: var(--muted);
  font-size: 14px;
}

.platform-list {
  border-top: 1px solid var(--border);
}

.platform-row {
  display: grid;
  grid-template-columns: minmax(220px, 0.9fr) minmax(300px, 1.3fr) auto;
  align-items: center;
  gap: 32px;
  min-height: 120px;
  border-bottom: 1px solid var(--border);
}

.platform-title h3 {
  margin-bottom: 4px;
  font-size: 20px;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.platform-title p,
.release-info {
  color: var(--muted);
  font-size: 14px;
}

.platform-title p {
  margin: 0;
}

.release-info {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
}

.release-info > span {
  position: relative;
}

.release-info > span + span::before {
  position: absolute;
  left: -11px;
  color: var(--border);
  content: "·";
}

.status.error {
  color: var(--danger);
}

.download-button {
  min-width: 156px;
  padding: 9px 16px;
  font-size: 14px;
}

.download-button[aria-disabled="true"] {
  cursor: wait;
  opacity: 0.62;
}

noscript {
  display: block;
  margin-top: 20px;
  color: var(--muted);
  font-size: 14px;
}

.about {
  display: grid;
  grid-template-columns: minmax(240px, 0.8fr) minmax(0, 1.4fr);
  gap: clamp(56px, 10vw, 140px);
  padding-block: 96px;
}

.about-heading {
  align-self: start;
}

.facts {
  margin: 0;
  border-top: 1px solid var(--border);
}

.facts > div {
  display: grid;
  grid-template-columns: minmax(130px, 0.55fr) minmax(0, 1.45fr);
  gap: 28px;
  padding-block: 22px;
  border-bottom: 1px solid var(--border);
}

.facts dt {
  font-weight: 650;
}

.facts dd {
  margin: 0;
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  min-height: 88px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 780px) {
  .container {
    width: min(100% - 32px, 640px);
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 36px;
    min-height: auto;
    padding-block: 64px;
  }

  .hero-logo {
    grid-row: 1;
    width: 88px;
  }

  .product-name {
    font-size: clamp(46px, 14vw, 64px);
  }

  .slogan {
    margin-top: 12px;
    font-size: clamp(25px, 8vw, 34px);
  }

  .download-section {
    padding-block: 60px;
  }

  .section-heading,
  .about {
    grid-template-columns: 1fr;
  }

  .section-heading {
    align-items: start;
    gap: 12px;
  }

  .platform-row {
    grid-template-columns: 1fr;
    gap: 18px;
    padding-block: 28px;
  }

  .download-button {
    width: 100%;
  }

  .about {
    gap: 44px;
    padding-block: 76px;
  }

  .facts > div {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}

@media (max-width: 460px) {
  .header-action {
    min-height: 44px;
    padding-inline: 10px;
    font-size: 13px;
  }

  .brand span {
    font-size: 14px;
  }

  .lead {
    font-size: 17px;
  }

  .release-info {
    display: grid;
    gap: 5px;
  }

  .release-info > span + span::before {
    content: none;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
  }
}

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

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

@media print {
  .site-header,
  .primary-action,
  .download-button {
    display: none;
  }
}