:root {
  color-scheme: light;
  --ink: #1c273c;
  --muted: #667288;
  --blue: #3869dc;
  --line: #dfe5ef;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 32px; }
body { margin: 0; color: var(--ink); background: radial-gradient(ellipse at 86% 20%, #e7edff 0, transparent 43%), linear-gradient(155deg, #f9fafc, #f3f5f9 65%, #f9fafc); }
a { color: inherit; text-decoration: none; }
a, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, summary:focus-visible { outline: 3px solid #668ff1; outline-offset: 5px; border-radius: 6px; }
button, a, summary { touch-action: manipulation; }
.wrap { max-width: 1120px; width: calc(100% - 80px); margin-inline: auto; }
.skip-link { position: fixed; left: 20px; top: -80px; z-index: 10; padding: 12px 20px; background: white; border: 1px solid var(--blue); }
.skip-link:focus { top: 16px; }
.site-header { display: flex; align-items: center; justify-content: space-between; padding-block: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 19px; font-weight: 650; letter-spacing: .04em; }
.brand img { flex-shrink: 0; }
nav { display: flex; align-items: center; gap: 32px; font-size: 13px; color: #5d687a; }
nav a:hover { color: var(--blue); }
.hero { min-height: 670px; padding: 72px 0 86px; display: grid; grid-template-columns: 1.2fr 1fr; gap: 72px; align-items: center; }
.eyebrow { display: flex; align-items: center; gap: 9px; font-size: 10px; font-weight: 650; letter-spacing: .18em; color: #718098; margin: 0 0 26px; }
.live-dot { width: 6px; height: 6px; background: var(--blue); border-radius: 50%; }
h1 { font-size: clamp(40px, 4.6vw, 60px); font-weight: 650; line-height: 1.3; letter-spacing: -.045em; margin: 0 0 24px; }
.accent { color: var(--blue); }
.hero-description { font-size: 17px; color: var(--muted); line-height: 1.95; margin: 0 0 31px; letter-spacing: .025em; }
.platform-note { font-size: 11px; color: #748096; margin-top: 15px; }
.release-card { background: #ffffffdb; border: 1px solid white; box-shadow: 0 24px 70px #355e9d10, 0 2px 8px #355e9d06; padding: 24px 30px; border-radius: 25px; }
.card-topline { display: flex; align-items: center; justify-content: space-between; font-size: 9px; color: #8b96aa; letter-spacing: .14em; }
.edition { font-size: 10px; letter-spacing: 0; color: #5a729c; background: #edf2fc; border: 1px solid #dce6f8; border-radius: 20px; padding: 5px 10px; }
.app-emblem { text-align: center; margin: 26px 0 16px; }
.app-emblem img { box-shadow: 0 11px 20px #3869dc29; border-radius: 23px; }
.release-card h2 { font-size: 24px; text-align: center; letter-spacing: -.035em; margin: 0; font-weight: 650; }
.release-card h2 span { font-weight: 400; color: #748299; margin-left: 4px; font-size: 23px; }
.release-subtitle { text-align: center; margin: 9px 0 12px; color: #8a94a5; font-size: 11px; font-variant-numeric: tabular-nums; }
.release-subtitle span { padding-inline: 5px; }
.notary-badge { margin: 0; font-size: 11px; color: #3f826e; text-align: center; }
.notary-badge span { display: inline-block; border-radius: 50%; width: 14px; height: 14px; background: #e6f3eb; margin-right: 4px; }
.release-details { border-top: 1px solid #edf0f5; padding-top: 15px; margin: 22px 0 20px; }
.release-details div { display: flex; align-items: center; justify-content: space-between; margin-block: 12px; font-size: 12px; }
.release-details dt { color: #8a94a5; }
.release-details dd { margin: 0; color: #4d5c75; }
.download-button { display: flex; align-items: center; justify-content: center; gap: 12px; background: var(--blue); border: 1px solid #285cce; border-radius: 10px; padding: 13px; color: white; font-size: 14px; font-weight: 550; box-shadow: 0 4px 8px #3869dc19; transition: background .16s ease; }
.download-button:hover { background: #2858c4; }
.download-button:disabled { width: 100%; opacity: .55; cursor: wait; }
.download-button:disabled:hover { background: var(--blue); }
.release-pending { font-size: 12px; color: var(--muted); text-align: center; }
.checksum { margin-top: 16px; font-size: 10px; color: #7a889e; }
.checksum summary { cursor: pointer; text-align: center; }
.checksum p { margin-bottom: 6px; }
.checksum code { font-size: 9px; line-height: 1.7; overflow-wrap: anywhere; display: block; user-select: all; color: #526581; }
.checksum a { display: inline-block; color: var(--blue); margin-top: 10px; text-decoration: underline; text-underline-offset: 3px; }
.about-section { border-top: 1px solid var(--line); padding: 64px 0; }
.section-heading .eyebrow, .install-section .eyebrow { margin-bottom: 13px; }
.section-heading h2, .install-section h2 { font-size: 30px; font-weight: 550; letter-spacing: -.025em; margin: 0; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 55px; margin-top: 42px; }
.feature-number { color: #91a2bf; font-size: 12px; font-variant-numeric: tabular-nums; }
.features h3 { margin: 15px 0 10px; font-size: 17px; font-weight: 550; }
.features p { margin: 0; font-size: 13px; color: var(--muted); line-height: 1.9; }
.install-section { display: grid; grid-template-columns: 1fr 1.15fr; gap: 70px; border-top: 1px solid var(--line); padding: 62px 0; }
.section-description { font-size: 13px; color: var(--muted); margin-top: 17px; }
.install-steps { margin: 0; padding: 0; list-style: none; }
.install-steps li { display: flex; gap: 17px; margin-bottom: 25px; }
.install-steps li:last-child { margin-bottom: 0; }
.step-number { display: flex; align-items: center; justify-content: center; width: 28px; height: 28px; flex-shrink: 0; border: 1px solid #dbe2ed; background: #ffffff91; border-radius: 50%; color: #6780a9; font-size: 11px; }
.install-steps h3 { font-size: 14px; font-weight: 550; margin: 4px 0 7px; }
.install-steps p { font-size: 12px; line-height: 1.8; color: var(--muted); margin: 0; }
.privacy-note { padding: 22px 26px; background: #e9eef580; border: 1px solid #e3e9f2; border-radius: 12px; font-size: 11px; line-height: 1.9; color: #76839a; }
.privacy-note p { margin: 0; }
.privacy-note p + p { margin-top: 9px; }
.privacy-note strong { font-weight: 550; color: #5c6c87; margin-right: 10px; }
.site-footer { display: flex; align-items: center; justify-content: space-between; gap: 15px; padding-block: 42px; font-size: 11px; color: #8d97a8; }
.footer-brand { font-size: 12px; color: #758097; gap: 8px; }
@media (max-width: 900px) {
  .hero { gap: 35px; }
  .release-card { padding: 24px; }
  .features { gap: 30px; }
  .hero-description { font-size: 15px; }
}
@media (max-width: 680px) {
  .wrap { width: calc(100% - 40px); }
  .site-header { padding-block: 20px; }
  .brand { font-size: 16px; gap: 9px; }
  .brand img { width: 32px; height: 32px; }
  nav { gap: 16px; font-size: 12px; }
  nav > a:first-child { display: none; }
  .hero { grid-template-columns: 1fr; padding: 44px 0 50px; gap: 42px; }
  .hero-copy { text-align: center; }
  .hero-copy .eyebrow { justify-content: center; font-size: 9px; }
  h1 { font-size: clamp(37px, 9.5vw, 54px); }
  .hero-description { font-size: 15px; }
  .release-card { max-width: 430px; width: 100%; margin-inline: auto; padding: 23px 27px; }
  .features { grid-template-columns: 1fr; gap: 30px; margin-top: 32px; }
  .features article { display: grid; grid-template-columns: 32px 1fr; column-gap: 12px; }
  .feature-number { grid-row: span 2; padding-top: 3px; }
  .features h3 { margin: 0 0 8px; }
  .features p { grid-column: 2; }
  .about-section { padding: 42px 0; }
  .section-heading h2, .install-section h2 { font-size: 27px; }
  .install-section { grid-template-columns: 1fr; gap: 28px; padding: 42px 0; }
  .privacy-note { padding: 18px; }
  .site-footer { flex-wrap: wrap; padding-block: 30px; }
  .site-footer > span:last-child { display: none; }
  .footer-brand img { width: 24px; height: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}