:root {
  color-scheme: light;
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #ffffff;
  color: #191919;
  --header-height: 76px;
}

* { box-sizing: border-box; }

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100svh;
  margin: 0;
}

a { color: inherit; }

.site-header { background: #111111; color: #f6f6f6; }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  gap: 24px;
  padding: 0 32px;
}

.wordmark {
  flex: none;
  padding: 4px 0 7px;
  font-size: 36px;
  font-weight: 900;
  letter-spacing: -1.8px;
  line-height: 1;
  text-decoration: none;
}

.language {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.4px;
  white-space: nowrap;
}

.language svg { flex: none; }

.language a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  color: #aaaaaa;
  text-decoration: none;
}

.language a[aria-current="page"] { color: #ffffff; }
.language a:hover { color: #ffffff; text-decoration: underline; text-underline-offset: 6px; }
.language-divider { height: 12px; width: 1px; background: #444444; }

main {
  display: flex;
  flex: 1;
  align-items: center;
  width: 100%;
  max-width: 1184px;
  margin: 0 auto;
  padding: 104px 32px 120px;
}

main:focus { outline: none; }
.intro { width: 100%; }

.brand-label {
  margin: 0 0 24px;
  color: #686868;
  font-size: 14px;
  line-height: 1.5;
  letter-spacing: 1.2px;
}

h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(40px, 5.2vw, 68px);
  font-weight: 600;
  letter-spacing: -2.4px;
  line-height: 1.1;
  text-wrap: balance;
}

.description {
  max-width: 730px;
  margin: 28px 0 0;
  color: #5b5b5b;
  font-size: 20px;
  line-height: 1.75;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  min-height: 52px;
  margin-top: 40px;
  padding: 16px 22px;
  background: #111111;
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
}

.contact-link:hover { background: #333333; }
.contact-link svg { flex: none; }

.site-footer {
  margin: 0 32px;
  padding: 24px 0;
  border-top: 1px solid #e8e8e8;
  color: #737373;
  font-size: 12px;
  line-height: 1.5;
}

.site-footer p { margin: 0; }

.skip-link {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  padding: 12px 16px;
  transform: translateY(-200%);
  background: white;
  color: #111111;
}

.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 2px solid currentColor; outline-offset: 6px; }
.contact-link:focus-visible { outline-color: #111111; }
html[lang="zh-CN"] h1 { letter-spacing: -0.5px; line-height: 1.3; }

@media (max-width: 600px) {
  :root { --header-height: 68px; }

  .header-inner { gap: 16px; padding: 0 20px; }
  .wordmark { font-size: 30px; }
  .language { gap: 8px; font-size: 11px; }
  .language svg { width: 16px; height: 16px; }
  main { padding: 64px 24px 80px; }
  .brand-label { margin-bottom: 20px; font-size: 13px; }
  h1 { font-size: 40px; letter-spacing: -1.4px; line-height: 1.12; }
  .description { margin-top: 24px; font-size: 17px; line-height: 1.8; }
  .contact-link { margin-top: 32px; }
  .site-footer { margin: 0 20px; padding: 20px 4px; }
}