:root {
  color-scheme: light dark;
  --canvas: #f2f2f2;
  --surface: #ffffff;
  --raised: #f7f7f8;
  --ink: #181819;
  --muted: #606066;
  --divider: #dddee3;
  --accent: #010195;
  --accent-soft: #ddeeff;
  --focus: #1769e0;
  --shadow: 0 24px 70px rgba(1, 1, 40, 0.09);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
    "PingFang TC", "Noto Sans CJK SC", "Noto Sans CJK TC", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { background: var(--canvas); scroll-behavior: smooth; }

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font-size: 16px;
  line-height: 1.78;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-underline-offset: 0.22em; }
a:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; border-radius: 6px; }

.skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  padding: 9px 14px;
  border-radius: 10px;
  color: #fff;
  background: var(--accent);
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.site-shell { width: min(100% - 32px, 920px); margin: 0 auto; padding: 28px 0 56px; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 44px;
  margin-bottom: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 760;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 10px;
  color: var(--accent);
  background: var(--accent-soft);
  font-family: "Kaiti SC", "STKaiti", "KaiTi", serif;
  font-size: 20px;
  font-weight: 700;
}

.language-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 6px 12px;
  border: 1px solid var(--divider);
  border-radius: 999px;
  color: var(--ink);
  background: var(--surface);
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}

.language-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }

.document {
  overflow: hidden;
  border: 1px solid var(--divider);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.document-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 32px;
  padding: clamp(30px, 7vw, 64px);
  color: #fff;
  background: radial-gradient(circle at 82% 18%, rgba(147, 202, 253, 0.42), transparent 28%),
    linear-gradient(132deg, #010195 0%, #1010ae 58%, #3434c7 100%);
}

.document-kicker {
  margin: 0 0 12px;
  color: #c9e5ff;
  font-size: 12px;
  font-weight: 760;
  letter-spacing: 0.16em;
}

.document h1, .language-panel h1 {
  margin: 0;
  font-family: "Songti SC", "Songti TC", "STSong", serif;
  font-size: clamp(32px, 6vw, 54px);
  line-height: 1.14;
}

.document-summary { max-width: 44em; margin: 20px 0 0; color: rgba(255, 255, 255, 0.86); }

.folio {
  display: grid;
  width: 82px;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.48);
  border-radius: 22px 7px;
  background: rgba(255, 255, 255, 0.1);
  font-family: "Kaiti SC", "STKaiti", "KaiTi", serif;
  font-size: 28px;
  font-weight: 800;
  line-height: 1;
  text-align: center;
}

.metadata {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  padding: 18px clamp(26px, 7vw, 64px);
  border-bottom: 1px solid var(--divider);
  color: var(--muted);
  background: var(--raised);
  font-size: 13px;
}

.metadata strong { color: var(--ink); }
.document-body { padding: clamp(30px, 7vw, 64px); }

.notice {
  margin: 0 0 42px;
  padding: 18px 20px;
  border: 1px solid #93cafd;
  border-radius: 14px;
  background: var(--accent-soft);
}

.notice strong { color: var(--accent); }

.policy-section {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 16px;
  padding: 30px 0;
  border-top: 1px solid var(--divider);
}

.policy-section:first-of-type { padding-top: 0; border-top: 0; }

.section-index {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 50%;
  color: var(--accent);
  background: var(--accent-soft);
  font-size: 12px;
  font-weight: 800;
}

.section-content h2 { margin: 1px 0 12px; font-size: clamp(20px, 3vw, 24px); line-height: 1.35; }
.section-content p { margin: 0 0 12px; }
.section-content p:last-child { margin-bottom: 0; }
.section-content ul { margin: 10px 0 0; padding-left: 1.25em; }
.section-content li + li { margin-top: 8px; }

.contact-card {
  display: grid;
  gap: 7px;
  margin: 16px 0;
  padding: 18px 20px;
  border-radius: 14px;
  background: var(--raised);
}

.contact-card span { color: var(--muted); font-size: 13px; }

.document-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px clamp(26px, 7vw, 64px);
  border-top: 1px solid var(--divider);
  color: var(--muted);
  background: var(--raised);
  font-size: 13px;
}

.document-footer p { margin: 0; }
.language-home { min-height: calc(100vh - 112px); display: grid; place-items: center; }

.language-panel {
  width: min(100%, 720px);
  padding: clamp(30px, 7vw, 58px);
  border: 1px solid var(--divider);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.language-panel .folio { margin-bottom: 28px; color: #fff; background: var(--accent); }
.language-panel .document-kicker { color: var(--accent); }
.language-panel > p { max-width: 38em; margin: 16px 0 28px; color: var(--muted); }
.language-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }

.language-option {
  display: grid;
  gap: 3px;
  min-height: 92px;
  padding: 18px;
  border: 1px solid var(--divider);
  border-radius: 14px;
  color: var(--ink);
  background: var(--raised);
  text-decoration: none;
}

.language-option:hover { border-color: #93cafd; background: var(--accent-soft); }
.language-option strong { font-size: 18px; }
.language-option span { color: var(--muted); font-size: 13px; }

.app-policy-list { display: grid; gap: 12px; }

.app-policy-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px;
  border: 1px solid var(--divider);
  border-radius: 14px;
  background: var(--raised);
}

.app-policy-card > div:first-child { display: grid; gap: 2px; }
.app-policy-card span { color: var(--muted); font-size: 13px; }
.app-policy-links { display: flex; flex-wrap: wrap; gap: 10px; }
.app-policy-links a { font-weight: 650; }

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #101014;
    --surface: #1c1c21;
    --raised: #26262c;
    --ink: #f6f6f7;
    --muted: #b7b7c0;
    --divider: #383842;
    --accent: #9ca8ff;
    --accent-soft: #18334d;
    --focus: #93cafd;
    --shadow: 0 28px 80px rgba(0, 0, 0, 0.34);
  }
}

@media (max-width: 620px) {
  .site-shell { width: min(100% - 20px, 920px); padding-top: 14px; }
  .document { border-radius: 22px; }
  .document-head { grid-template-columns: 1fr; gap: 24px; }
  .topbar { align-items: flex-start; flex-direction: column; }
  .language-links { justify-content: flex-start; }
  .folio { width: 66px; font-size: 23px; }
  .policy-section { grid-template-columns: 1fr; gap: 12px; }
  .language-options { grid-template-columns: 1fr; }
  .app-policy-card { align-items: flex-start; flex-direction: column; }
  .document-footer { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}

@media print {
  :root { color-scheme: light; --canvas: #fff; --surface: #fff; --raised: #fff; --ink: #000; --muted: #444; --divider: #bbb; --shadow: none; }
  body { background: #fff; font-size: 11pt; }
  .site-shell { width: 100%; padding: 0; }
  .topbar, .skip-link, .folio { display: none; }
  .document { border: 0; border-radius: 0; box-shadow: none; }
  .document-head { display: block; padding: 0 0 20pt; color: #000; background: #fff; }
  .document-kicker, .document-summary { color: #333; }
  .metadata, .document-body, .document-footer { padding-right: 0; padding-left: 0; }
  .policy-section { break-inside: avoid; }
  a { color: #000; }
}