:root {
  --background: #f6f4ef;
  --text: #171717;
  --muted: #6f6b63;
  --border: rgba(23, 23, 23, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  display: flex;
  flex-direction: column;
  background: var(--background);
  color: var(--text);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "PingFang SC",
    "Hiragino Sans GB",
    "Microsoft YaHei",
    Arial,
    sans-serif;
}

button {
  font: inherit;
}

.site-header {
  width: 100%;
  padding: 28px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.brand-logo {
  display: block;
  width: auto;
  height: 46px;
  object-fit: contain;
  mix-blend-mode: multiply;
}

.language-switcher {
  display: flex;
  align-items: center;
  gap: 9px;
}

.language-button {
  padding: 4px 0;
  border: 0;
  border-bottom: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
  transition:
    color 0.2s ease,
    border-color 0.2s ease;
}

.language-button:hover,
.language-button.active {
  color: var(--text);
  border-bottom-color: var(--text);
}

.language-divider {
  color: #aaa59c;
  font-size: 13px;
}

.hero {
  width: 100%;
  flex: 1;
  display: grid;
  place-items: center;
  padding: 72px 24px;
  text-align: center;
}

.content {
  width: min(780px, 100%);
}

h1 {
  margin: 0;
  font-family:
    Georgia,
    "Noto Serif SC",
    "Songti SC",
    "SimSun",
    serif;
  font-size: clamp(40px, 6vw, 76px);
  font-weight: 500;
  line-height: 1.16;
  letter-spacing: -0.03em;
}

.english-name,
.chinese-name {
  margin: 30px 0 0;
  color: var(--muted);
  font-size: clamp(15px, 2vw, 18px);
  line-height: 1.7;
}

.message {
  width: fit-content;
  margin: 42px auto 0;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  color: var(--text);
  font-size: 15px;
  letter-spacing: 0.05em;
}

footer {
  width: 100%;
  padding: 20px 48px 30px;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

footer p {
  width: 100%;
  margin: 0;
  text-align: center;
}

[hidden] {
  display: none !important;
}

@media (max-width: 640px) {
  .site-header {
    padding: 22px 20px;
  }

  .brand-logo {
    height: 38px;
  }

  .hero {
    padding: 52px 20px;
  }

  h1 {
    font-size: clamp(36px, 11vw, 52px);
  }

  footer {
    padding: 20px;
    line-height: 1.6;
  }
}