:root {
  color-scheme: light;
  --brand: #0878f4;
  --ink: #172b4d;
  --muted: #667085;
  --line: #e4eaf2;
  --surface: #f6f9fc;
  --notice: #f0f7ff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

a { color: var(--brand); }

.page {
  width: min(880px, calc(100% - 32px));
  margin: 32px auto;
  padding: clamp(24px, 5vw, 56px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 14px 40px rgb(16 24 40 / 6%);
}

.language-page { display: flex; flex-direction: column; }
.language-page #zh { order: 1; }
.language-page #en {
  order: 2;
  margin-top: 64px;
  padding-top: 56px;
  border-top: 2px solid var(--line);
}
.language-page .footer { order: 3; }

.brand {
  margin: 0 0 4px;
  color: var(--brand);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .08em;
}

h1 { margin: 0; font-size: clamp(30px, 6vw, 46px); line-height: 1.2; }
h2 { margin-top: 36px; font-size: 23px; line-height: 1.35; }
h3 { margin-top: 24px; font-size: 18px; }
.meta, .muted { color: var(--muted); }

.language-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 30px;
}

.language-nav a {
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
}

.language-nav a:hover,
.language-nav a:focus-visible { border-color: var(--brand); }

ul { padding-left: 1.3em; }
li + li { margin-top: 8px; }

.notice {
  padding: 16px 18px;
  border-left: 4px solid var(--brand);
  border-radius: 10px;
  background: var(--notice);
}

.contact-card {
  display: grid;
  gap: 8px;
  margin: 20px 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}

.footer {
  margin-top: 50px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 560px) {
  .page { width: 100%; margin: 0; border: 0; border-radius: 0; }
}

@media print {
  body { background: #fff; }
  .page { width: 100%; margin: 0; border: 0; box-shadow: none; }
  .language-nav { display: none; }
}