:root {
  color-scheme: light;
  --bg: #eef7f8;
  --surface: rgba(255, 255, 255, 0.92);
  --line: rgba(14, 77, 89, 0.14);
  --text: #11323a;
  --muted: #516972;
  --accent: #10879a;
  --accent-dark: #0b6170;
  --shadow: 0 18px 50px rgba(14, 77, 89, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(16, 135, 154, 0.18), transparent 30%),
    radial-gradient(circle at top right, rgba(0, 120, 212, 0.12), transparent 28%),
    linear-gradient(180deg, #f6fbfc 0%, var(--bg) 100%);
}

.page {
  width: min(920px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 48px 0 72px;
}

.hero,
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero {
  padding: 32px;
  margin-bottom: 20px;
}

.card {
  padding: 24px 26px;
  margin-bottom: 16px;
}

.card.small {
  margin-bottom: 0;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-dark);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 12px;
}

h1,
h2 {
  margin: 0 0 14px;
}

h1 {
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1;
}

h2 {
  font-size: 20px;
}

p,
li {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.6;
}

.lede {
  max-width: 720px;
}

.zh {
  margin-top: 10px;
}

ul,
ol {
  margin: 0;
  padding-left: 22px;
}

a {
  color: var(--accent-dark);
}

@media (max-width: 640px) {
  .page {
    width: min(100vw - 20px, 920px);
    padding: 20px 0 32px;
  }

  .hero,
  .card {
    border-radius: 18px;
  }

  .hero {
    padding: 24px 20px;
  }

  .card {
    padding: 20px;
  }
}