:root {
  --page: #f3f4f2;
  --surface: #fafaf8;
  --soft: #e9ece8;
  --text: #202322;
  --muted: #656a67;
  --subtle: #6a6f6c;
  --line: #d7dad6;
  --blue: #1769e0;
  --blue-on-soft: #1462d0;
  --blue-hover: #0d59c2;
  --green: #137a4a;
  --shadow: 0 24px 70px rgba(34, 39, 36, 0.11);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--page);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--blue-hover); outline-offset: 3px; }
.nowrap { white-space: nowrap; }
.shell { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }
.skip-link { position: fixed; top: -80px; left: 16px; z-index: 100; padding: 10px 14px; background: var(--text); color: white; border-radius: 8px; }
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 68px;
  border-bottom: 1px solid rgba(215, 218, 214, 0.82);
  background: rgba(243, 244, 242, 0.9);
  backdrop-filter: blur(18px);
}
.nav { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.wordmark { display: flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 760; letter-spacing: -0.025em; }
.wordmark img { width: 34px; height: 34px; border-radius: 9px; }
.nav-links { display: flex; align-items: center; gap: 24px; color: var(--muted); font-size: 14px; }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--text); }

.hero { padding: 94px 0 112px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(390px, 0.95fr); gap: 76px; align-items: center; }
.badge { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 24px; padding: 6px 11px; border: 1px solid #cdd5cd; border-radius: 999px; color: var(--green); background: #f7faf6; font-size: 12px; font-weight: 700; }
.badge::before { width: 7px; height: 7px; border-radius: 50%; background: #1d9b61; content: ""; box-shadow: 0 0 0 4px rgba(29, 155, 97, 0.1); }
h1 { margin: 0; font-size: clamp(62px, 8vw, 92px); line-height: 0.98; letter-spacing: -0.03em; }
.hero h2 { max-width: 680px; margin: 28px 0 14px; font-size: clamp(28px, 3.5vw, 44px); line-height: 1.2; letter-spacing: -0.042em; }
.hero-summary { max-width: 640px; margin: 0; color: var(--muted); font-size: 18px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { min-height: 50px; padding: 12px 20px; display: inline-flex; align-items: center; justify-content: center; gap: 4px; border: 1px solid transparent; border-radius: 11px; font-size: 15px; font-weight: 720; transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease; }
.button:hover { transform: translateY(-1px); }
.button.primary { color: white; background: var(--blue); box-shadow: 0 9px 22px rgba(23, 105, 224, 0.2); }
.button.primary:hover { background: var(--blue-hover); }
.button.secondary { border-color: #c9ceca; background: var(--surface); }
.button.secondary:hover { border-color: #adb4af; background: white; }
.facts { display: flex; flex-wrap: wrap; gap: 8px 15px; margin-top: 23px; color: var(--muted); font-size: 13px; }
.facts span + span::before { margin-right: 15px; color: #aab0ac; content: "·"; }

.product-visual { position: relative; padding: 34px 34px 0; overflow: hidden; border: 1px solid #d4d8d4; border-radius: 28px; background: linear-gradient(145deg, #e6e9e5, #f8f8f5); box-shadow: var(--shadow); }
.product-visual::before { position: absolute; inset: -30% 10% auto; height: 50%; border-radius: 50%; background: rgba(23, 105, 224, 0.1); filter: blur(55px); content: ""; }
.product-visual img { position: relative; width: 100%; height: auto; display: block; border-radius: 16px 16px 0 0; box-shadow: 0 24px 55px rgba(20, 24, 22, 0.22); }

.section { padding: 100px 0; border-top: 1px solid var(--line); }
.eyebrow { margin: 0 0 10px; color: var(--blue); font-size: 13px; font-weight: 760; letter-spacing: 0.04em; text-transform: uppercase; }
.section h2, .download-panel h2 { max-width: 760px; margin: 0; font-size: clamp(34px, 4vw, 50px); line-height: 1.18; letter-spacing: -0.045em; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 36px; margin-top: 54px; }
.feature { padding-top: 21px; border-top: 1px solid #c4c9c4; }
.feature strong { display: block; margin-bottom: 7px; font-size: 20px; letter-spacing: -0.02em; }
.feature p { margin: 0; color: var(--muted); }

.soft { background: var(--soft); }
.soft .eyebrow { color: var(--blue-on-soft); }
.privacy-grid { display: grid; grid-template-columns: 0.92fr 1.08fr; gap: 96px; align-items: start; }
.check-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid #cfd3cf; }
.check-list li { padding: 17px 0; border-bottom: 1px solid #cfd3cf; color: #444945; }
.check-list li::before { margin-right: 11px; color: var(--green); font-weight: 800; content: "✓"; }

.release-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 80px; align-items: start; }
.release-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 34px; }
.release-meta div { padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.release-meta small { display: block; color: var(--subtle); font-size: 12px; }
.release-meta strong { display: block; margin-top: 3px; font-size: 15px; }
.release-card { padding: 30px; border: 1px solid var(--line); border-radius: 20px; background: var(--surface); box-shadow: 0 14px 42px rgba(34, 39, 36, 0.06); }
.release-card h3 { margin: 0 0 8px; font-size: 21px; letter-spacing: -0.025em; }
.release-card p { margin: 0; color: var(--muted); }
.checksum { margin-top: 23px; }
.checksum span { display: block; margin-bottom: 7px; color: var(--subtle); font-size: 12px; font-weight: 700; }
.checksum code { display: block; padding: 13px; overflow-wrap: anywhere; border: 1px solid var(--line); border-radius: 10px; background: var(--page); color: #414642; font: 12px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace; }
.release-links { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 22px; color: var(--blue); font-size: 14px; font-weight: 650; }

.faq-list { max-width: 860px; margin-top: 38px; border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 22px 36px 22px 0; cursor: pointer; list-style: none; font-weight: 680; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { position: absolute; right: 5px; color: var(--subtle); font-size: 21px; font-weight: 400; content: "+"; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { max-width: 720px; margin: 0; padding: 0 0 23px; color: var(--muted); }

.download { padding: 76px 0; border-top: 1px solid var(--line); background: var(--soft); }
.download-panel { display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.download-panel h2 { font-size: clamp(31px, 4vw, 42px); }
.download-panel p { margin: 7px 0 0; color: var(--muted); }
.download-actions { display: flex; gap: 12px; flex-shrink: 0; }

footer { padding: 30px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.footer-inner { display: flex; justify-content: space-between; gap: 20px; }
.footer-links { display: flex; gap: 20px; }
.footer-links a:hover { color: var(--text); }

@media (max-width: 900px) {
  .hero-grid, .privacy-grid, .release-grid { grid-template-columns: 1fr; }
  .hero-grid { gap: 58px; }
  .product-visual { max-width: 580px; }
  .privacy-grid, .release-grid { gap: 42px; }
  .download-panel { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 680px) {
  .shell { width: min(100% - 28px, 1120px); }
  .site-header { height: 60px; }
  .nav-links a:not(.language-link) { display: none; }
  .hero { padding: 62px 0 78px; }
  h1 { font-size: 58px; }
  .hero h2 { font-size: 32px; }
  .actions, .download-actions { display: grid; width: 100%; }
  .actions .button, .download-actions .button { width: 100%; }
  .facts { display: grid; gap: 4px; }
  .facts span + span::before { display: none; }
  .product-visual { padding: 18px 14px 0; border-radius: 20px; }
  .section { padding: 74px 0; }
  .feature-grid { grid-template-columns: 1fr; gap: 28px; }
  .release-meta { grid-template-columns: 1fr; }
  .release-card { padding: 22px; }
  .download { padding: 62px 0; }
  .footer-inner { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}