:root {
  color-scheme: light;
  --ink: #171818;
  --muted: #6c7270;
  --line: #e6e8e7;
  --paper: #fbfcfb;
  --green: #16785f;
  --green-deep: #0e5c49;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

main { max-width: 980px; margin: 0 auto; padding: 0 28px; }

.hero { padding: 112px 0 98px; text-align: center; }

.app-icon {
  display: block;
  width: 136px;
  height: 136px;
  margin: 0 auto 30px;
  border-radius: 30px;
  box-shadow: 0 18px 36px rgba(20, 42, 34, .18);
}

.eyebrow { margin: 0 0 14px; color: var(--green); font-size: 12px; font-weight: 750; letter-spacing: .13em; }
h1 { margin: 0; font-size: clamp(42px, 8vw, 76px); letter-spacing: -.07em; line-height: 1; }
.subtitle { margin: 20px 0 32px; color: var(--muted); font-size: 20px; letter-spacing: -.02em; }

.download-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  padding: 0 23px;
  color: white;
  background: var(--ink);
  border-radius: 14px;
  text-decoration: none;
  font-size: 16px;
  font-weight: 650;
  transition: background .18s ease, transform .18s ease;
}
.download-button:hover { background: var(--green-deep); transform: translateY(-1px); }
.download-button span { font-size: 22px; line-height: 1; }
.meta { margin: 15px 0 0; color: var(--muted); font-size: 13px; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.features article { padding: 42px 34px 44px; }
.features article + article { border-left: 1px solid var(--line); }
.feature-icon { color: var(--green); font-family: Georgia, serif; font-size: 34px; line-height: 1; }
.features h2 { margin: 22px 0 10px; font-size: 20px; letter-spacing: -.03em; }
.features p, .privacy-note p { margin: 0; color: var(--muted); line-height: 1.65; }

.privacy-note { display: flex; align-items: center; justify-content: space-between; gap: 28px; padding: 43px 0; }
.privacy-note p { max-width: 650px; }
a { color: var(--green-deep); }
.privacy-note a, footer a { font-weight: 650; white-space: nowrap; }
footer { display: flex; justify-content: space-between; max-width: 980px; margin: 0 auto; padding: 24px 28px 36px; color: var(--muted); font-size: 13px; }

.policy-page { max-width: 760px; padding-top: 72px; padding-bottom: 72px; }
.policy-page h1 { margin-bottom: 16px; }
.policy-page h2 { margin: 43px 0 12px; font-size: 22px; letter-spacing: -.03em; }
.policy-page p { color: #404543; font-size: 16px; line-height: 1.85; }
.policy-page .updated, .back-link { color: var(--muted); }
.back-link { display: inline-block; margin-bottom: 64px; text-decoration: none; }
.policy-page hr { margin: 46px 0 25px; border: 0; border-top: 1px solid var(--line); }
.english-title { color: var(--ink) !important; font-weight: 700; }

@media (max-width: 640px) {
  main { padding: 0 22px; }
  .hero { padding: 76px 0 66px; }
  .app-icon { width: 112px; height: 112px; border-radius: 25px; }
  .features { grid-template-columns: 1fr; }
  .features article { padding: 29px 8px; }
  .features article + article { border-top: 1px solid var(--line); border-left: 0; }
  .privacy-note { display: block; }
  .privacy-note a { display: inline-block; margin-top: 18px; }
  footer { padding: 24px 22px 30px; }
  .policy-page { padding-top: 42px; padding-bottom: 42px; }
  .back-link { margin-bottom: 48px; }
}