:root {
  color-scheme: light dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f7f4ed;
  color: #171717;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 20%, rgba(92, 96, 255, 0.18), transparent 32rem),
    radial-gradient(circle at 82% 12%, rgba(140, 72, 255, 0.16), transparent 28rem),
    #f7f4ed;
}

a {
  color: #3454ff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.page {
  width: min(1040px, calc(100vw - 40px));
  margin: 0 auto;
  padding: 72px 0;
}

.hero {
  min-height: calc(100vh - 144px);
  display: grid;
  align-content: center;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  margin: 0 0 22px;
}

.app-icon {
  width: 72px;
  height: 72px;
  display: block;
  border-radius: 18px;
  box-shadow: 0 18px 36px rgba(20, 20, 20, 0.14);
}

.eyebrow {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: #4b4fe9;
}

h1 {
  margin: 0;
  max-width: 820px;
  font-size: clamp(46px, 9vw, 104px);
  line-height: 0.96;
  letter-spacing: 0;
}

h2 {
  margin: 36px 0 12px;
}

.subtitle {
  max-width: 680px;
  margin: 24px 0 0;
  font-size: clamp(20px, 3vw, 30px);
  line-height: 1.35;
  color: #4d4d55;
}

.zh {
  margin-top: 10px;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: #171717;
  font-weight: 700;
  box-shadow: 0 10px 30px rgba(20, 20, 20, 0.08);
}

.document {
  max-width: 760px;
  font-size: 18px;
  line-height: 1.65;
}

.document h1 {
  font-size: clamp(38px, 7vw, 72px);
}

.back {
  display: inline-block;
  margin-bottom: 32px;
  font-weight: 700;
}

.muted {
  color: #77777f;
}

@media (prefers-color-scheme: dark) {
  :root {
    background: #181713;
    color: #f3f0e8;
  }

  body {
    background:
      radial-gradient(circle at 20% 20%, rgba(92, 96, 255, 0.22), transparent 32rem),
      radial-gradient(circle at 82% 12%, rgba(140, 72, 255, 0.18), transparent 28rem),
      #181713;
  }

  .subtitle,
  .muted {
    color: #c8c2b7;
  }

  .links a {
    background: rgba(255, 255, 255, 0.12);
    color: #f3f0e8;
  }

  .app-icon {
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.36);
  }
}