:root {
  color-scheme: light;
  --ink: #20344f;
  --muted: #566a83;
  --blue: #315d9c;
  --line: #20344f1c;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: #f5f8fc;
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
body { margin: 0; min-width: 280px; }
a { color: inherit; text-underline-offset: 5px; }
a:focus-visible { outline: 2px solid var(--blue); outline-offset: 6px; border-radius: 3px; }
.landing {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(ellipse at 77% 27%, #ffe6cd75, transparent 44%),
    radial-gradient(ellipse at 25% 64%, #c3ddff80, transparent 53%),
    linear-gradient(165deg, #fafbf9 12%, #f1f6fc 56%, #e9f0f9);
}
.site-header, .site-footer { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.site-header { width: 100%; padding: 34px 5.5%; }
.brand { display: inline-flex; align-items: center; gap: 7px; font-size: 17px; font-weight: 650; letter-spacing: -.5px; text-decoration: none; }
.brand-dot { width: 5px; height: 5px; border-radius: 50%; background: #c69250; }
.nav-link { font-size: 13px; color: var(--muted); text-decoration: none; }
.nav-link span { margin-left: 6px; }
.nav-link:hover { color: var(--blue); text-decoration: underline; }
.hero { flex: 1; display: grid; place-items: center; padding: 32px 24px 66px; text-align: center; }
.hero-content { width: 100%; max-width: 680px; }
.app-icon { display: block; width: clamp(162px, 22vw, 214px); height: auto; margin: 0 auto 22px; filter: drop-shadow(0 18px 24px #4e77a221); }
.eyebrow { margin: 0 0 22px; color: var(--muted); font-size: 10px; font-weight: 550; letter-spacing: 2.6px; }
h1 { margin: 0; font-size: clamp(48px, 7vw, 68px); line-height: 1.2; letter-spacing: 6px; font-weight: 600; }
.english-name { display: block; margin-top: 12px; font-size: 20px; line-height: 1.5; letter-spacing: 1px; font-weight: 450; }
.tagline { margin: 30px 0 12px; font-size: clamp(18px, 3vw, 23px); font-weight: 450; letter-spacing: 2px; }
.description { margin: 0; font-size: 14px; line-height: 1.9; color: var(--muted); letter-spacing: .7px; }
.platform { display: inline-block; margin-top: 31px; padding: 9px 15px; border: 1px solid #536f8f26; border-radius: 30px; font-size: 11px; color: var(--muted); letter-spacing: .7px; }
.site-footer { margin: 0 5.5%; padding: 22px 0 25px; border-top: 1px solid var(--line); font-size: 11px; color: var(--muted); letter-spacing: .4px; }
.policy-page { background: linear-gradient(150deg, #fafbf9, #f0f5fc); min-height: 100vh; }
.policy { width: min(100% - 48px, 680px); margin: 54px auto 92px; }
.policy .eyebrow { color: var(--blue); margin-bottom: 15px; }
.policy h1 { font-size: clamp(32px, 5vw, 44px); letter-spacing: 1px; }
.updated { margin: 18px 0 32px; color: var(--muted); font-size: 12px; }
.policy-summary { padding: 24px 26px; border: 1px solid #315d9c20; border-radius: 16px; background: #ffffff85; }
.policy-summary strong { display: block; font-size: 19px; font-weight: 550; margin-bottom: 9px; }
.policy p { font-size: 14px; line-height: 1.95; color: #4b5f78; }
.policy-summary p { margin: 0; }
.policy section { margin-top: 31px; }
.policy h2 { margin: 0 0 10px; font-size: 17px; font-weight: 600; }
.policy section p { margin: 0; }
.policy .back-link { display: inline-block; margin-top: 38px; color: var(--blue); font-size: 13px; }
@media (max-width: 600px) {
  .site-header { padding: 24px; }
  .brand { font-size: 15px; }
  .hero { padding: 30px 24px 48px; }
  .eyebrow { font-size: 9px; letter-spacing: 1.8px; }
  .tagline { letter-spacing: 1px; }
  .site-footer { margin: 0 24px; flex-wrap: wrap; gap: 10px; font-size: 10px; padding: 20px 0; }
  .policy { margin-top: 32px; margin-bottom: 60px; }
  .policy-summary { padding: 21px; }
}