:root {
  color-scheme: light dark;
  --background: #f5f6f8;
  --surface: #fff;
  --text: #202124;
  --secondary: #65676d;
  --border: rgba(40, 42, 48, .12);
  --accent: #259da3;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--background);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

main {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
  padding: 32px 0 80px;
}

.languages {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
  margin-bottom: 56px;
}

.languages button {
  padding: 8px 12px;
  border: 0;
  border-radius: 10px;
  color: var(--secondary);
  background: transparent;
  font: inherit;
  cursor: pointer;
}

html[data-language="en"] [data-select-language="en"],
html[data-language="zh-Hans"] [data-select-language="zh-Hans"],
html[data-language="zh-Hant"] [data-select-language="zh-Hant"] {
  color: var(--text);
  background: rgba(127, 127, 127, .12);
  font-weight: 650;
}

[data-language-content] {
  display: none;
}

html[data-language="en"] [data-language-content="en"],
html[data-language="zh-Hans"] [data-language-content="zh-Hans"],
html[data-language="zh-Hant"] [data-language-content="zh-Hant"] {
  display: block;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 16px;
  font-weight: 700;
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(42px, 8vw, 64px);
  line-height: 1.1;
  letter-spacing: -.035em;
}

h2 {
  margin: 0 0 14px;
  font-size: 22px;
  line-height: 1.4;
}

p {
  margin: 0;
  color: var(--secondary);
  font-size: 16px;
  line-height: 1.7;
}

.lead {
  max-width: 620px;
  font-size: 19px;
}

.contact-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  margin: 44px 0 52px;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: 0 16px 48px rgba(20, 22, 28, .06);
}

.primary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 14px;
  color: #071d1f;
  background: #2bc0c6;
  font-weight: 700;
  text-decoration: none;
}

details {
  border-top: 1px solid var(--border);
}

details:last-of-type {
  border-bottom: 1px solid var(--border);
}

summary {
  padding: 20px 2px;
  font-size: 17px;
  font-weight: 650;
  cursor: pointer;
}

details p {
  padding: 0 2px 22px;
}

footer {
  margin-top: 48px;
}

footer a {
  color: var(--accent);
  text-decoration: none;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #202124;
    --surface: #2c2d31;
    --text: #f5f5f7;
    --secondary: rgba(235, 235, 245, .65);
    --border: rgba(235, 235, 245, .12);
    --accent: #2bc0c6;
  }

  .contact-card {
    box-shadow: none;
  }
}

@media (max-width: 620px) {
  main {
    width: calc(100% - 32px);
    padding-top: 20px;
  }

  .languages {
    justify-content: flex-start;
    margin-bottom: 42px;
  }

  .contact-card {
    grid-template-columns: 1fr;
    padding: 22px;
  }

  .primary-action {
    width: 100%;
  }
}