:root {
  --paper: #f6f6f7;
  --white: #ffffff;
  --ink: #0b0b0d;
  --muted: #686875;
  --soft: #a0a0aa;
  --line: #dcdce1;
  --blue: #1677ff;
  --dark: #080808;
  --content: 1200px;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; overflow-x: hidden; background: var(--paper); letter-spacing: 0; }
::selection { background: #cfe2ff; color: var(--ink); }
html { scrollbar-color: #b7b7bf var(--paper); scrollbar-width: thin; }
body, button, a { font: inherit; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { border: 0; cursor: pointer; }

.content-width { width: min(var(--content), calc(100% - 48px)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 20; height: 74px; background: rgba(246, 246, 247, .94); border-bottom: 1px solid rgba(220, 220, 225, .72); backdrop-filter: blur(16px); }
.header-inner { width: min(var(--content), calc(100% - 48px)); height: 100%; margin: 0 auto; display: flex; align-items: center; gap: 30px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 16px; font-weight: 700; white-space: nowrap; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.site-nav { display: flex; align-items: center; gap: 28px; margin-left: auto; color: var(--muted); font-size: 13px; }
.site-nav a, .header-download, .footer-inner a { transition: color .2s ease, opacity .2s ease; }
.site-nav a:hover, .footer-inner a:hover { color: var(--ink); }
.header-download { display: inline-flex; align-items: center; justify-content: center; min-height: 38px; padding: 0 17px; border-radius: 20px; background: var(--ink); color: var(--white); font-size: 13px; font-weight: 650; }
.header-download:hover { opacity: .78; }
.menu-toggle { display: none; width: 40px; height: 40px; margin-left: auto; border-radius: 50%; background: var(--white); color: var(--ink); }
.menu-toggle svg, .button svg, .platform-icon svg, .feature-row > svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.8; }

.hero { min-height: clamp(670px, calc(100svh - 150px), 880px); overflow: hidden; padding: 54px 24px 0; background: var(--paper); }
.hero-copy { position: relative; z-index: 2; text-align: center; }
.eyebrow, .section-kicker { margin: 0 0 20px; color: var(--muted); font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.hero h1 { margin: 0; font-size: 85px; line-height: .98; font-weight: 760; letter-spacing: 0; }
.hero-title { margin: 12px 0 0; font-size: 42px; line-height: 1.12; font-weight: 720; }
.hero-subtitle { margin: 18px 0 0; color: var(--muted); font-size: 18px; line-height: 1.5; }
.hero-actions { display: flex; align-items: center; justify-content: center; gap: 22px; margin-top: 28px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 48px; padding: 0 20px; border-radius: 25px; font-size: 14px; font-weight: 700; transition: transform .2s ease, background .2s ease, opacity .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--blue); color: var(--white); }
.button-primary:hover { background: #075fd6; }
.button-primary svg { width: 17px; height: 17px; }
.text-link, .light-link { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); font-size: 14px; font-weight: 650; }
.text-link span, .light-link span { font-size: 19px; line-height: 1; transition: transform .2s ease; }
.text-link:hover span, .light-link:hover span { transform: translateX(4px); }
.hero-stage { position: relative; width: min(1100px, 100%); height: 490px; margin: 52px auto 0; }
.product-desktop { position: absolute; z-index: 1; left: 3%; top: 0; width: 78%; margin: 0; filter: drop-shadow(0 22px 30px rgba(0, 0, 0, .14)); }
.product-desktop img { width: 100%; height: auto; border: 1px solid #cfcfd4; border-radius: 12px; }
.product-phone { position: absolute; z-index: 2; right: 3%; top: 50px; width: 25%; margin: 0; filter: drop-shadow(0 24px 36px rgba(0, 0, 0, .2)); }
.product-phone img { width: 100%; height: auto; }

.dark-proof { padding: 132px 0 144px; background: var(--dark); color: var(--white); }
.dark-proof-layout { display: grid; grid-template-columns: minmax(280px, .7fr) minmax(0, 1.3fr); gap: 9%; align-items: center; }
.dark-proof-inner { max-width: 760px; }
.section-kicker { color: #a1a1aa; }
.dark-proof h2, .experience h2, .downloads h2 { margin: 0; font-size: 56px; line-height: 1.08; font-weight: 730; letter-spacing: 0; }
.dark-proof-copy { max-width: 520px; margin: 28px 0 32px; color: #a1a1aa; font-size: 17px; line-height: 1.75; }
.light-link { color: var(--white); }
.proof-screen { margin: 0; overflow: hidden; }
.proof-screen img { display: block; width: 100%; height: auto; }
.proof-desktop-screen { border-radius: 12px; box-shadow: 0 28px 64px rgba(0, 0, 0, .38); }

.section-light, .section-paper { background: var(--white); }
.experience { padding: 136px 0 150px; }
.feature-showcase { display: grid; grid-template-columns: minmax(240px, .7fr) minmax(0, 1.3fr); gap: 8%; align-items: start; }
.section-kicker-dark { color: var(--muted); }
.experience h2, .downloads h2 { font-size: 46px; }
.experience-intro > p:last-child { max-width: 360px; margin: 26px 0 0; color: var(--muted); font-size: 16px; line-height: 1.75; }
.feature-evidence { display: grid; grid-template-columns: minmax(170px, .55fr) minmax(0, 1fr); gap: 44px; align-items: start; }
.proof-phone-screen { max-width: 360px; border-radius: 26px; box-shadow: 0 26px 60px rgba(0, 0, 0, .18); }
.feature-list { border-top: 1px solid var(--line); }
.feature-row { display: grid; grid-template-columns: 38px 1fr; gap: 18px; align-items: center; min-height: 112px; border-bottom: 1px solid var(--line); }
.feature-mark { width: 24px; height: 24px; color: var(--ink); }
.feature-row h3 { margin: 0 0 7px; font-size: 22px; line-height: 1.2; }
.feature-row p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.5; }
.feature-row > svg { color: var(--ink); }

.discovery { padding: 128px 0 138px; background: #eeeef0; }
.discovery-heading { display: grid; grid-template-columns: minmax(280px, .8fr) minmax(0, 1.2fr); gap: 10%; align-items: end; margin-bottom: 64px; }
.discovery h2 { margin: 0; font-size: 52px; line-height: 1.08; font-weight: 730; }
.discovery-heading > p { max-width: 520px; margin: 0 0 5px; color: var(--muted); font-size: 17px; line-height: 1.75; }
.discovery-ledger { border-top: 1px solid #cfcfd5; }
.discovery-row { display: grid; grid-template-columns: minmax(220px, .7fr) minmax(280px, 1fr) minmax(260px, .8fr); gap: 42px; align-items: center; min-height: 152px; border-bottom: 1px solid #cfcfd5; }
.discovery-row h3 { margin: 0; font-size: 30px; line-height: 1.2; transition: transform .28s cubic-bezier(.16, 1, .3, 1); }
.discovery-row:hover h3 { transform: translateX(8px); }
.discovery-capabilities { margin: 0; color: var(--ink); font-size: 18px; font-weight: 650; line-height: 1.55; }
.discovery-description { max-width: 34ch; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.65; }

.downloads { padding: 136px 0 154px; }
.download-heading { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 58px; }
.download-heading > p { max-width: 360px; margin: 0 0 4px; color: var(--muted); font-size: 15px; line-height: 1.7; }
.release-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.release-card { min-height: 360px; padding: 30px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); }
.release-card-top { display: flex; align-items: center; justify-content: space-between; }
.platform-icon { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%; }
.platform-icon-android { background: #dff5e6; color: #1b8d43; }
.platform-icon-desktop { background: #e3edff; color: #2569cc; }
.platform-icon svg { width: 23px; height: 23px; }
.platform-icon .platform-logo { fill: currentColor; stroke: none; }
.release-label { color: var(--muted); font-size: 12px; font-weight: 700; }
.release-card h3 { margin: 34px 0 8px; font-size: 32px; line-height: 1.1; }
.release-description { min-height: 48px; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.6; }
.release-meta { min-height: 24px; margin: 26px 0 18px; color: var(--ink); font-size: 13px; font-variant-numeric: tabular-nums; }
.button-dark { width: 100%; background: var(--ink); color: var(--white); }
.button-dark:hover { background: #26262a; }
.button-dark[aria-disabled="true"] { cursor: not-allowed; opacity: .42; pointer-events: none; }
.release-notes-panel { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line); }
.release-notes-panel summary { display: flex; align-items: center; justify-content: space-between; gap: 14px; cursor: pointer; color: var(--ink); font-size: 13px; font-weight: 650; list-style: none; }
.release-notes-panel summary::-webkit-details-marker { display: none; }
.release-notes-panel summary span { color: var(--muted); font-size: 20px; font-weight: 400; line-height: 1; transition: transform .2s ease; }
.release-notes-panel[open] summary span { transform: rotate(45deg); }
.release-notes-panel[hidden] { display: none; }
.release-notes { min-height: 0; margin: 14px 0 0; color: var(--muted); font-size: 12px; line-height: 1.65; white-space: pre-line; }

.site-footer { background: var(--dark); color: var(--white); }
.footer-inner { display: flex; align-items: center; min-height: 94px; gap: 28px; }
.footer-brand { font-size: 15px; }
.footer-brand img { width: 28px; height: 28px; border-radius: 7px; }
.footer-inner p { margin: 0 auto 0 0; color: #8f8f99; font-size: 13px; }
.footer-platforms { color: #8f8f99; font-size: 13px; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
:focus-visible { outline: 3px solid rgba(22, 119, 255, .45); outline-offset: 4px; }

@media (max-width: 820px) {
  .content-width, .header-inner { width: min(100% - 36px, var(--content)); }
  .site-header { height: 66px; }
  .site-nav { position: absolute; top: 66px; right: 18px; left: 18px; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 8px; border: 1px solid var(--line); border-radius: 8px; background: rgba(255, 255, 255, .98); box-shadow: 0 14px 34px rgba(0, 0, 0, .12); }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 13px 12px; }
  .header-download { display: none; }
  .menu-toggle { display: grid; place-items: center; }
  .hero { min-height: 670px; padding: 46px 18px 0; }
  .hero h1 { font-size: 56px; }
  .hero-title { margin-top: 12px; font-size: 31px; }
  .hero-subtitle { margin-top: 15px; font-size: 15px; }
  .hero-actions { gap: 15px; margin-top: 24px; }
  .button { min-height: 46px; padding: 0 16px; }
  .hero-stage { height: 350px; margin-top: 40px; }
  .product-desktop { left: 0; width: 100%; }
  .product-desktop img { border-radius: 8px; }
  .product-phone { right: 3%; top: 68px; width: 37%; }
  .dark-proof { padding: 92px 0 104px; }
  .dark-proof-layout { grid-template-columns: 1fr; gap: 50px; }
  .dark-proof h2, .experience h2, .downloads h2 { font-size: 38px; }
  .dark-proof-copy { font-size: 15px; }
  .experience, .downloads { padding: 92px 0 104px; }
  .feature-showcase { grid-template-columns: 1fr; gap: 54px; }
  .feature-evidence { grid-template-columns: minmax(170px, .45fr) minmax(0, 1fr); gap: 28px; }
  .proof-desktop-screen { width: 100%; }
  .feature-row { min-height: 112px; }
  .discovery { padding: 92px 0 104px; }
  .discovery-heading { grid-template-columns: 1fr; gap: 24px; margin-bottom: 44px; }
  .discovery h2 { font-size: 38px; }
  .discovery-heading > p { font-size: 15px; }
  .discovery-row { grid-template-columns: minmax(180px, .7fr) minmax(0, 1.3fr); gap: 12px 28px; min-height: 138px; padding: 26px 0; }
  .discovery-row h3 { font-size: 25px; }
  .discovery-description { grid-column: 2; }
  .download-heading { display: block; margin-bottom: 38px; }
  .download-heading > p { margin-top: 22px; }
  .release-grid { grid-template-columns: 1fr; }
  .release-card { min-height: 330px; }
  .footer-inner { flex-wrap: wrap; gap: 14px 20px; padding-top: 22px; padding-bottom: 22px; }
  .footer-inner p { width: 100%; order: 3; }
}

@media (max-width: 640px) {
  .eyebrow { margin-bottom: 14px; font-size: 10px; }
  .hero { min-height: 630px; }
  .hero-actions { flex-direction: column; gap: 16px; }
  .hero-stage { height: 300px; margin-top: 30px; }
  .product-phone { right: 5%; top: 58px; width: 34%; }
  .dark-proof h2, .experience h2, .downloads h2 { font-size: 34px; }
  .feature-evidence { grid-template-columns: 1fr; gap: 34px; }
  .proof-phone-screen { max-width: 300px; }
  .feature-row { grid-template-columns: 28px 1fr; gap: 14px; min-height: 108px; }
  .feature-row h3 { font-size: 19px; }
  .feature-row p { font-size: 13px; }
  .discovery h2 { font-size: 34px; }
  .discovery-row { grid-template-columns: 1fr; gap: 10px; min-height: 0; padding: 30px 0; }
  .discovery-row h3 { font-size: 25px; }
  .discovery-capabilities { font-size: 16px; }
  .discovery-description { grid-column: auto; }
  .release-card { padding: 24px; }
  .footer-platforms { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}