:root {
  color-scheme: light dark;
  --page: #f3f7f4;
  --surface: #fbfdfb;
  --surface-soft: #e8f0eb;
  --ink: #143c30;
  --muted: #52675f;
  --line: #cbd8d1;
  --accent: #d48524;
  --accent-ink: #2c1a06;
  --radius: 18px;
  --shadow: 0 18px 50px rgb(21 63 50 / 10%);
  font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--page); color: var(--ink); line-height: 1.75; }
a { color: inherit; }
.shell { width: min(100% - 40px, 960px); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 20; padding: 10px 14px; border-radius: 10px; background: var(--ink); color: var(--surface); }
.skip-link:focus { top: 12px; }
.policy-header { border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--page) 88%, transparent); backdrop-filter: blur(14px); }
.policy-nav { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.policy-brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; text-decoration: none; }
.policy-brand img { width: 34px; height: 34px; }
.back-link { min-height: 44px; display: inline-flex; align-items: center; padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px; text-decoration: none; font-weight: 700; }
.back-link:hover, .back-link:focus-visible { border-color: var(--ink); outline: none; }
.policy-hero { padding: 72px 0 44px; }
.policy-kicker { margin: 0 0 12px; color: var(--accent); font-weight: 800; letter-spacing: .08em; }
.policy-hero h1 { max-width: 14ch; margin: 0; font-size: clamp(38px, 7vw, 68px); line-height: 1.08; letter-spacing: -.045em; }
.policy-lead { max-width: 64ch; margin: 22px 0 0; color: var(--muted); font-size: 18px; }
.policy-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 24px; color: var(--muted); font-size: 14px; }
.policy-main { padding-bottom: 84px; }
.policy-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 44px; align-items: start; }
.policy-toc { position: sticky; top: 24px; padding: 18px; border-radius: var(--radius); background: var(--surface-soft); }
.policy-toc strong { display: block; margin-bottom: 8px; }
.policy-toc a { display: block; min-height: 42px; padding: 8px 0; color: var(--muted); text-decoration: none; }
.policy-toc a:hover, .policy-toc a:focus-visible { color: var(--ink); outline: none; }
.policy-content { min-width: 0; }
.policy-section { padding: 30px 0; border-top: 1px solid var(--line); }
.policy-section:first-child { padding-top: 0; border-top: 0; }
.policy-section h2 { margin: 0 0 12px; font-size: clamp(24px, 4vw, 34px); line-height: 1.25; letter-spacing: -.025em; }
.policy-section h3 { margin: 24px 0 8px; font-size: 18px; }
.policy-section p { margin: 0 0 14px; color: var(--muted); }
.policy-section ul, .policy-section ol { margin: 12px 0; padding-left: 1.35em; color: var(--muted); }
.policy-section li + li { margin-top: 8px; }
.notice { margin: 18px 0 0; padding: 18px 20px; border-left: 4px solid var(--accent); border-radius: 0 var(--radius) var(--radius) 0; background: var(--surface-soft); }
.notice strong { color: var(--ink); }
.contact-panel { padding: 28px; border-radius: var(--radius); background: var(--ink); color: #f3f7f4; box-shadow: var(--shadow); }
.contact-panel h2 { margin: 0 0 10px; font-size: 28px; }
.contact-panel p { margin: 0 0 16px; color: #cddbd4; }
.contact-link { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 10px 18px; border-radius: 999px; background: var(--accent); color: var(--accent-ink); font-weight: 800; text-decoration: none; }
.policy-footer { padding: 30px 0; border-top: 1px solid var(--line); color: var(--muted); }
.policy-footer-inner { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.policy-footer a { min-height: 44px; display: inline-flex; align-items: center; }

@media (max-width: 720px) {
  .shell { width: min(100% - 28px, 960px); }
  .policy-hero { padding: 48px 0 34px; }
  .policy-lead { font-size: 16px; }
  .policy-layout { grid-template-columns: 1fr; gap: 30px; }
  .policy-toc { position: static; display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
  .policy-toc strong { grid-column: 1 / -1; }
  .policy-content { font-size: 15px; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #0f211b;
    --surface: #172d25;
    --surface-soft: #1c352c;
    --ink: #eef6f1;
    --muted: #b7c8bf;
    --line: #365247;
    --accent: #e6a24a;
    --accent-ink: #241606;
    --shadow: 0 18px 50px rgb(0 0 0 / 24%);
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}