:root {
  color-scheme: light;
  --navy: #172033;
  --navy-soft: #222d46;
  --blue: #3769c8;
  --blue-dark: #2855ac;
  --green: #12805c;
  --green-soft: #e8f8f2;
  --ink: #192033;
  --muted: #69758a;
  --line: #dde4ee;
  --surface: #ffffff;
  --surface-soft: #f5f8fc;
  --radius-sm: 12px;
  --radius: 18px;
  --radius-lg: 28px;
  --shadow: 0 22px 60px rgba(27, 43, 75, .11);
  --shell: 1180px;
  font-family: Inter, "SF Pro Display", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--surface); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.shell { width: min(calc(100% - 40px), var(--shell)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 100; top: 8px; left: 8px; padding: 10px 14px; color: white; background: var(--navy); border-radius: 8px; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; z-index: 50; top: 0; background: rgba(255,255,255,.9); border-bottom: 1px solid rgba(221,228,238,.8); backdrop-filter: blur(18px); }
.nav-shell { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; min-height: 48px; }
.brand img { border-radius: 13px; box-shadow: 0 8px 20px rgba(55,105,200,.18); }
.brand span { display: grid; gap: 1px; }
.brand strong { font-size: 20px; letter-spacing: -.02em; }
.brand small { color: var(--muted); font-size: 12px; }
.nav-links { display: flex; align-items: center; gap: 10px; }
.nav-links a { padding: 11px 14px; color: #48546a; font-size: 14px; font-weight: 650; border-radius: 10px; transition: color .18s ease, background .18s ease, transform .18s ease; }
.nav-links a:hover, .nav-links a:focus-visible, .nav-links a.active { color: var(--blue); background: #f1f5fc; outline: none; }
.nav-links .nav-login { color: #fff; background: var(--navy); padding-inline: 18px; }
.nav-links .nav-login:hover, .nav-links .nav-login:focus-visible { color: #fff; background: var(--navy-soft); transform: translateY(-1px); }

.hero { min-height: 690px; display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 64px; padding-block: 82px 88px; }
.eyebrow { margin: 0 0 18px; color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.status-dot { display: inline-block; width: 8px; height: 8px; margin-right: 9px; border-radius: 50%; background: #29bf8a; box-shadow: 0 0 0 5px rgba(41,191,138,.12); }
.hero h1 { margin: 0; font-size: clamp(44px, 5.5vw, 72px); line-height: 1.07; letter-spacing: -.055em; }
.hero h1 span { color: var(--blue); }
.hero-lead { max-width: 610px; margin: 26px 0 0; color: var(--muted); font-size: 18px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button { display: inline-flex; min-height: 50px; align-items: center; justify-content: center; padding: 13px 22px; border: 0; border-radius: 13px; font: inherit; font-weight: 760; cursor: pointer; transition: transform .16s ease, box-shadow .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); }
.button:focus-visible, .copy-button:focus-visible { outline: 3px solid rgba(55,105,200,.28); outline-offset: 3px; }
.button-primary { color: #fff; background: var(--navy); box-shadow: 0 14px 28px rgba(23,32,51,.17); }
.button-primary:hover { background: var(--navy-soft); box-shadow: 0 17px 34px rgba(23,32,51,.22); }
.button-secondary { color: var(--ink); background: #f2f5f9; }
.button-secondary:hover { background: #e9eef5; }
.button-full { width: 100%; }
.button-disabled { color: #8b96a8; background: #edf1f6; cursor: not-allowed; box-shadow: none; }
.button-disabled:hover { transform: none; }
.trust-row { display: flex; flex-wrap: wrap; gap: 19px; margin: 27px 0 0; padding: 0; list-style: none; color: #59657a; font-size: 13px; font-weight: 680; }
.trust-row li::before { content: ""; display: inline-block; width: 6px; height: 6px; margin-right: 8px; vertical-align: 2px; border-radius: 50%; background: var(--green); }

.product-stage { position: relative; min-width: 0; padding: 30px 0 18px 18px; }
.stage-glow { position: absolute; inset: -12% -7% -14% 0; background: radial-gradient(circle at 50% 48%, rgba(73,116,204,.18), rgba(255,255,255,0) 66%); }
.status-panel { position: relative; padding: 24px; overflow: hidden; background: rgba(255,255,255,.96); border: 1px solid rgba(209,219,232,.9); border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.status-panel::before { content: ""; position: absolute; inset: 0 0 auto; height: 4px; background: linear-gradient(90deg, #4fc4a1, #4776d5); }
.panel-header { display: flex; justify-content: space-between; align-items: center; gap: 14px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.panel-brand { display: flex; align-items: center; gap: 12px; }
.panel-brand img { border-radius: 13px; }
.panel-brand div { display: grid; gap: 4px; }
.panel-brand strong { font-size: 16px; }
.panel-brand span { color: var(--muted); font-size: 12px; }
.secure-pill { display: inline-flex; align-items: center; gap: 7px; padding: 8px 10px; color: #0f6f50; background: var(--green-soft); border-radius: 999px; font-size: 12px; font-weight: 800; }
.secure-pill i, .health-line i { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: #27b982; }
.route-card { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 14px; margin-top: 22px; padding: 18px; background: var(--navy); border-radius: 17px; color: #fff; }
.route-icon { width: 42px; height: 42px; display: grid; place-items: center; background: rgba(255,255,255,.1); border-radius: 12px; }
.route-icon svg { width: 25px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.route-card div:nth-child(2) { display: grid; gap: 3px; }
.route-card div:nth-child(2) span { color: #aebbd1; font-size: 11px; }
.route-card div:nth-child(2) strong { font-size: 17px; }
.live-state { color: #7ce1bb; font-size: 12px; font-weight: 800; }
.path-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 13px; }
.path-item { display: grid; gap: 6px; padding: 18px; background: var(--surface-soft); border: 1px solid #e9eef5; border-radius: 16px; }
.path-item span, .path-item small { color: var(--muted); font-size: 11px; }
.path-item strong { font-size: 16px; }
.health-line { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 19px 5px 1px; color: var(--muted); font-size: 11px; }
.health-line span:first-child { display: flex; align-items: center; gap: 7px; color: var(--green); font-weight: 750; }

.section { padding-block: 100px; }
.section-heading { max-width: 700px; margin: 0 auto 46px; text-align: center; }
.section-heading.align-left { margin: 0; text-align: left; }
.section-heading h2, .security-card h2, .final-cta h2, .verification-section h2 { margin: 0; font-size: clamp(32px, 4vw, 48px); line-height: 1.15; letter-spacing: -.04em; }
.section-heading > p:last-child { color: var(--muted); font-size: 17px; line-height: 1.75; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-card { min-height: 240px; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.feature-card:hover { transform: translateY(-4px); border-color: #c8d5e8; box-shadow: 0 18px 42px rgba(31,49,81,.08); }
.feature-number { color: var(--blue); font-size: 13px; font-weight: 850; letter-spacing: .08em; }
.feature-card h3 { margin: 48px 0 10px; font-size: 24px; }
.feature-card p { margin: 0; color: var(--muted); line-height: 1.75; }

.ecosystem-section { background: var(--surface-soft); }
.ecosystem-grid { display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: 80px; }
.text-link { display: inline-flex; gap: 8px; align-items: center; margin-top: 8px; color: var(--blue); font-weight: 800; }
.system-list { display: grid; gap: 12px; }
.system-list article { display: grid; grid-template-columns: auto 1fr auto; gap: 15px; align-items: center; padding: 18px; background: #fff; border: 1px solid var(--line); border-radius: 16px; }
.system-mark { width: 42px; height: 42px; display: grid; place-items: center; color: var(--blue); background: #edf3ff; border-radius: 12px; font-weight: 850; }
.system-list div { display: grid; gap: 4px; }
.system-list small { color: var(--muted); }
.system-state { color: var(--green); font-size: 12px; font-weight: 800; }
.system-state.muted { color: var(--muted); }

.security-card { display: grid; grid-template-columns: 1.2fr .8fr; align-items: center; gap: 70px; padding: 56px; color: #fff; background: var(--navy); border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.eyebrow.light { color: #7fdcbc; }
.security-card p:not(.eyebrow) { max-width: 650px; color: #b9c4d8; line-height: 1.8; }
.security-card ul { display: grid; gap: 16px; margin: 0; padding: 0; list-style: none; }
.security-card li { display: flex; gap: 12px; align-items: center; padding: 13px 0; border-bottom: 1px solid rgba(255,255,255,.11); font-weight: 700; }
.security-card li span { width: 9px; height: 9px; border-radius: 50%; background: #54d5a6; box-shadow: 0 0 0 5px rgba(84,213,166,.1); }
.final-cta { display: grid; justify-items: center; text-align: center; padding-top: 48px; }
.final-cta img { border-radius: 20px; box-shadow: 0 16px 34px rgba(55,105,200,.18); }
.final-cta h2 { margin-top: 24px; }
.final-cta p { margin: 14px 0 25px; color: var(--muted); font-size: 17px; }

.download-hero { padding-block: 88px 45px; text-align: center; }
.download-hero h1 { margin: 0; font-size: clamp(44px, 6vw, 68px); letter-spacing: -.055em; }
.download-hero > p:last-child { max-width: 700px; margin: 20px auto 0; color: var(--muted); font-size: 17px; line-height: 1.75; }
.download-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; padding-block: 26px 70px; }
.download-card { padding: 30px; border: 1px solid var(--line); border-radius: 22px; }
.download-card.recommended { border-color: #b8c9e8; box-shadow: 0 20px 50px rgba(38,69,124,.1); }
.download-card.pending { background: var(--surface-soft); }
.download-card-head { display: flex; gap: 18px; align-items: center; }
.download-card-head h2 { margin: 2px 0 5px; font-size: 27px; letter-spacing: -.025em; }
.download-card-head p { margin: 0; color: var(--muted); font-size: 13px; }
.download-card-head .recommend-label { color: var(--green); font-weight: 800; }
.download-card-head .pending-label { color: var(--blue); font-weight: 800; }
.platform-icon { flex: 0 0 auto; width: 60px; height: 60px; padding: 13px; background: var(--navy); border-radius: 17px; }
.platform-icon.windows { display: grid; grid-template-columns: 1fr 1fr; gap: 3px; transform: perspective(80px) rotateY(-4deg); }
.platform-icon.windows i { display: block; background: #fff; }
.platform-icon.android { position: relative; background: #e7edf6; }
.platform-icon.android span { position: absolute; inset: 19px 14px 12px; background: #8793a6; border-radius: 8px 8px 5px 5px; }
.platform-icon.android span::before, .platform-icon.android span::after { content: ""; position: absolute; top: -8px; width: 2px; height: 10px; background: #8793a6; }
.platform-icon.android span::before { left: 7px; transform: rotate(-28deg); }
.platform-icon.android span::after { right: 7px; transform: rotate(28deg); }
.release-points { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; margin: 30px 0; padding: 0; list-style: none; color: #48546a; font-size: 14px; }
.release-points li::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 8px; border-radius: 50%; background: var(--green); }
.file-meta { margin: 13px 0 0; color: var(--muted); text-align: center; font-size: 12px; }
.pending-copy { min-height: 111px; margin: 30px 0; color: var(--muted); line-height: 1.75; }
.install-section { display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; border-top: 1px solid var(--line); }
.steps { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.steps li { display: grid; grid-template-columns: auto 1fr; gap: 15px; padding: 18px; background: var(--surface-soft); border-radius: 15px; }
.steps > li > span { width: 34px; height: 34px; display: grid; place-items: center; color: #fff; background: var(--navy); border-radius: 10px; font-weight: 800; }
.steps strong { display: block; margin: 2px 0 5px; }
.steps p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; }
code { padding: 2px 5px; color: #203961; background: #edf2f9; border-radius: 5px; font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace; }
.verification-section { padding: 45px; background: #f3f6fb; border: 1px solid var(--line); border-radius: 22px; }
.verification-section > div:first-child p:last-child { color: var(--muted); line-height: 1.7; }
.hash-box { display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: center; margin-top: 24px; padding: 13px 13px 13px 17px; background: #fff; border: 1px solid #d7e0ec; border-radius: 13px; }
.hash-box code { overflow-wrap: anywhere; padding: 0; color: #30415f; background: transparent; font-size: 12px; line-height: 1.7; }
.copy-button { min-width: 64px; min-height: 44px; padding: 8px 13px; color: var(--blue); background: #ecf2ff; border: 0; border-radius: 10px; font: inherit; font-weight: 800; cursor: pointer; }
.copy-status { min-height: 20px; margin: 8px 0 0; color: var(--green); font-size: 13px; }
.release-section { padding-bottom: 120px; }
.release-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.release-grid p { margin: 0; padding: 20px; color: #526076; background: var(--surface-soft); border-radius: 14px; line-height: 1.7; }

.site-footer { padding-block: 44px; color: #adb9cc; background: #111827; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 22px 60px; align-items: center; }
.footer-grid strong { color: #fff; font-size: 19px; }
.footer-grid p { margin: 6px 0 0; font-size: 12px; line-height: 1.6; }
.footer-grid > div:nth-child(2) { display: flex; gap: 22px; color: #e6ebf3; font-size: 13px; font-weight: 700; }
.footer-grid > p { grid-column: 1 / -1; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.09); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 30px; padding-block: 64px; }
  .product-stage { width: min(100%, 620px); margin-inline: auto; padding-left: 0; }
  .feature-grid, .download-layout { grid-template-columns: 1fr; }
  .ecosystem-grid, .security-card, .install-section { grid-template-columns: 1fr; gap: 42px; }
  .security-card { padding: 40px; }
}

@media (max-width: 680px) {
  .shell { width: min(calc(100% - 28px), var(--shell)); }
  .nav-shell { min-height: 68px; }
  .brand { gap: 8px; }
  .brand img { width: 36px; height: 36px; }
  .brand strong { font-size: 18px; }
  .brand small { display: none; }
  .nav-links { gap: 4px; }
  .nav-links a { display: none; }
  .nav-links .nav-login, .nav-links a.active { display: inline-flex; padding: 9px 10px; font-size: 12px; white-space: nowrap; }
  .hero { min-height: auto; padding-block: 55px; }
  .hero h1 { font-size: 43px; }
  .hero-lead { font-size: 16px; }
  .hero-actions .button { width: 100%; }
  .status-panel { padding: 18px; }
  .panel-header { align-items: flex-start; }
  .secure-pill { white-space: nowrap; }
  .path-grid { grid-template-columns: 1fr; }
  .health-line { align-items: flex-start; flex-direction: column; }
  .section { padding-block: 70px; }
  .feature-card { min-height: 210px; }
  .ecosystem-grid { gap: 34px; }
  .system-list article { grid-template-columns: auto 1fr; }
  .system-state { grid-column: 2; }
  .security-card { padding: 30px 24px; }
  .download-hero { padding-block: 62px 32px; }
  .download-hero h1 { font-size: 43px; }
  .download-card { padding: 23px; }
  .download-card-head { align-items: flex-start; }
  .release-points, .release-grid { grid-template-columns: 1fr; }
  .pending-copy { min-height: 0; }
  .verification-section { padding: 25px 20px; }
  .hash-box { grid-template-columns: 1fr; }
  .copy-button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-grid > div:nth-child(2) { flex-wrap: wrap; }
  .footer-grid > p { grid-column: 1; }
}

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