:root {
  color-scheme: light;
  --bg: #f3f6f8;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: #ffffff;
  --text: #12212f;
  --muted: #5e6c79;
  --line: rgba(18, 33, 47, 0.08);
  --brand: #1677ff;
  --brand-strong: #0f5ed7;
  --shadow: 0 24px 60px rgba(18, 33, 47, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(22, 119, 255, 0.08), transparent 28%),
    radial-gradient(circle at top right, rgba(15, 94, 215, 0.06), transparent 24%),
    var(--bg);
  color: var(--text);
}

a {
  color: inherit;
}

.site-shell,
.policy-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-shell {
  padding: 36px 0 28px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.8fr);
  gap: 24px;
  align-items: stretch;
}

.hero-copy,
.hero-panel,
.feature,
.policy-content,
.policy-header {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.hero-copy,
.policy-header {
  padding: 40px;
}

.hero-panel {
  padding: 22px;
  display: grid;
  gap: 14px;
  align-content: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(22, 119, 255, 0.1);
  color: var(--brand-strong);
  font-size: 13px;
  font-weight: 600;
}

h1 {
  margin: 18px 0 14px;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.05;
}

.lead {
  margin: 0;
  font-size: 18px;
  line-height: 1.7;
  color: var(--muted);
}

.policy-meta {
  margin: 18px 0 0;
  font-size: 14px;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.primary-link,
.secondary-link,
.back-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
}

.primary-link {
  background: var(--brand);
  color: #fff;
}

.primary-link:hover {
  background: var(--brand-strong);
}

.secondary-link,
.back-link {
  background: rgba(18, 33, 47, 0.05);
  color: var(--text);
}

.metric {
  padding: 18px;
  border-radius: 8px;
  background: var(--surface-strong);
  border: 1px solid rgba(18, 33, 47, 0.06);
}

.metric-label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--muted);
}

.metric strong {
  font-size: 22px;
}

.feature-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.feature {
  padding: 26px;
}

.feature h2,
.policy-content h2 {
  margin: 0 0 10px;
  font-size: 22px;
}

.feature p,
.policy-content p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.site-footer {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 0 0 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 14px;
}

.site-footer nav {
  display: flex;
  gap: 18px;
}

.site-footer a {
  text-decoration: none;
}

.policy-shell {
  padding: 36px 0 48px;
}

.policy-content {
  margin-top: 18px;
  padding: 32px 40px;
  display: grid;
  gap: 24px;
}

.back-link {
  width: fit-content;
}

@media (max-width: 860px) {
  .hero,
  .feature-band,
  .site-footer {
    grid-template-columns: 1fr;
    display: grid;
  }

  .site-footer {
    justify-content: stretch;
  }

  .site-footer nav {
    gap: 12px;
  }
}

@media (max-width: 640px) {
  .site-shell,
  .policy-shell,
  .site-footer {
    width: min(100% - 24px, 1120px);
  }

  .hero-copy,
  .policy-header,
  .policy-content {
    padding: 24px;
  }

  .hero-panel,
  .feature {
    padding: 18px;
  }

  h1 {
    font-size: 34px;
  }

  .lead {
    font-size: 16px;
  }
}