:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #172033;
  --muted: #667085;
  --line: #e4e7ec;
  --brand: #1768e5;
  --brand-soft: #eef5ff;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgb(228 231 236 / 90%);
  background: rgb(255 255 255 / 94%);
  backdrop-filter: blur(14px);
}

.header-inner,
.page,
.footer-inner {
  width: min(920px, calc(100% - 40px));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  min-height: 64px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  color: #101828;
  font-size: 18px;
  font-weight: 750;
  text-decoration: none;
}

.nav { display: flex; flex-wrap: wrap; gap: 18px; }
.nav a { font-size: 14px; text-decoration: none; }

.page { padding: 48px 0 72px; }

.document {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--card);
  box-shadow: 0 12px 36px rgb(16 24 40 / 6%);
  padding: 48px 56px;
}

h1 { margin: 0; font-size: 32px; line-height: 1.3; }
h2 { margin: 34px 0 12px; font-size: 21px; line-height: 1.5; }
h3 { margin: 22px 0 8px; color: #344054; font-size: 16px; }
p, li { color: #475467; font-size: 15px; line-height: 1.9; }
p { margin: 10px 0; }
ul, ol { margin: 8px 0; padding-left: 24px; }
strong { color: #344054; }

.meta { margin: 12px 0 32px; color: var(--muted); font-size: 14px; }

.notice,
.contact-card {
  margin: 20px 0;
  border-radius: 14px;
  background: var(--brand-soft);
  padding: 18px 20px;
}

.notice { border-left: 4px solid var(--brand); }
.contact-card p { margin: 4px 0; }

.site-footer { border-top: 1px solid var(--line); background: #fff; }
.footer-inner {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: #98a2b3;
  font-size: 13px;
}
.footer-links { display: flex; gap: 16px; }
.footer-links a { text-decoration: none; }

@media (max-width: 680px) {
  .header-inner, .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 16px 0;
  }
  .page { padding: 20px 0 40px; }
  .document { border-radius: 14px; padding: 28px 22px; }
  h1 { font-size: 27px; }
}