:root {
  --ink: #16181d;
  --muted: #626874;
  --line: #dfe3e8;
  --paper: #ffffff;
  --mist: #f5f7fa;
  --blue: #0878e8;
  --blue-dark: #005bb8;
  --night: #101216;
  --radius: 28px;
  --shadow: 0 24px 80px rgba(27, 40, 58, .09);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Segoe UI Variable", "Microsoft YaHei UI", "PingFang SC", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid rgba(8, 120, 232, .32);
  outline-offset: 4px;
}
.shell { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.skip { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 10px 16px; background: var(--night); color: white; border-radius: 10px; }
.skip:focus { top: 16px; }
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.84);
  backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid rgba(223,227,232,.72);
}
.nav { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 720; letter-spacing: -.02em; }
.brand-mark { width: 31px; height: 31px; border-radius: 10px; display: grid; place-items: center; background: var(--night); color: white; font-size: 13px; box-shadow: inset 0 0 0 1px rgba(255,255,255,.15); }
.nav-links { display: flex; align-items: center; gap: 30px; font-size: 14px; color: #3e434d; }
.nav-links a:hover { color: var(--blue); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.menu-toggle { display: none; border: 0; background: transparent; font: inherit; }
.button {
  min-width: 132px; min-height: 44px; padding: 10px 20px;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid transparent; border-radius: 999px;
  background: var(--blue); color: white; font-weight: 680; line-height: 1.2;
  white-space: nowrap; word-break: keep-all; writing-mode: horizontal-tb;
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}
.button:hover { transform: translateY(-2px); background: var(--blue-dark); box-shadow: 0 12px 28px rgba(8,120,232,.22); }
.button.ghost { background: white; color: var(--ink); border-color: var(--line); }
.button.ghost:hover { color: var(--blue); box-shadow: 0 12px 28px rgba(21,32,46,.08); }
.button.dark { background: var(--night); }
.eyebrow { margin: 0 0 14px; color: var(--blue); font-size: 13px; font-weight: 760; letter-spacing: .12em; text-transform: uppercase; }
.display { margin: 0; font-size: clamp(48px, 7vw, 92px); line-height: .99; letter-spacing: -.065em; font-weight: 740; }
.section-title { margin: 0; max-width: 800px; font-size: clamp(34px, 4.6vw, 62px); line-height: 1.06; letter-spacing: -.05em; font-weight: 720; }
.lead { max-width: 700px; margin: 24px 0 0; color: var(--muted); font-size: clamp(18px, 2vw, 22px); line-height: 1.65; }
.hero { padding: 92px 0 44px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: .85fr 1.15fr; align-items: center; gap: 58px; }
.hero-copy { padding-bottom: 10px; }
.hero-copy .display span { color: var(--blue); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.microcopy { margin-top: 18px; color: #7b818b; font-size: 13px; }
.hero-media {
  position: relative; align-self: center; height: auto; padding: 0; margin: 0;
  border-radius: 34px; overflow: hidden; background: #eef2f7; box-shadow: var(--shadow);
}
.platform-strip { padding: 28px 0 82px; }
.platform-row { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 20px 0; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.platform-row p { margin: 0; color: var(--muted); font-size: 14px; }
.platforms { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 9px; }
.tag { padding: 7px 13px; border: 1px solid var(--line); border-radius: 999px; color: #444a54; background: #fff; font-size: 13px; white-space: nowrap; }
.proof { padding: 96px 0; background: var(--night); color: white; }
.proof-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 80px; align-items: end; }
.proof .eyebrow { color: #8bc4ff; }
.proof .section-title { max-width: 760px; }
.proof-note { margin: 0; color: #adb3bd; font-size: 15px; border-left: 1px solid #353942; padding-left: 24px; }
.features { padding: 128px 0; }
.feature-intro { display: flex; justify-content: space-between; align-items: end; gap: 40px; margin-bottom: 68px; }
.feature-intro .lead { max-width: 420px; margin: 0; font-size: 17px; }
.feature-stage { display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px; }
.feature-photo { grid-row: span 2; border-radius: var(--radius); overflow: hidden; background: var(--mist); min-height: 640px; position: relative; }
.feature-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.feature-photo figcaption { position: absolute; left: 24px; bottom: 24px; max-width: 300px; padding: 15px 18px; border-radius: 16px; background: rgba(255,255,255,.9); backdrop-filter: blur(12px); font-size: 13px; color: #505660; }
.feature-card { padding: 38px; min-height: 305px; border-radius: var(--radius); background: var(--mist); display: flex; flex-direction: column; justify-content: space-between; }
.feature-card.dark-card { background: #1a1d23; color: white; }
.feature-card h3 { margin: 0; font-size: 28px; letter-spacing: -.035em; }
.feature-card p { margin: 42px 0 0; color: var(--muted); }
.dark-card p { color: #aeb4bf; }
.feature-ribbon { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 18px; overflow: hidden; border: 1px solid var(--line); border-radius: 22px; background: var(--line); }
.ribbon-item { padding: 25px; background: white; }
.ribbon-item strong { display: block; font-size: 16px; margin-bottom: 5px; }
.ribbon-item span { color: var(--muted); font-size: 13px; }
.seo-story { padding: 120px 0; background: var(--mist); }
.story-grid { display: grid; grid-template-columns: .72fr 1.28fr; gap: 80px; }
.story-index { position: sticky; top: 104px; align-self: start; }
.story-index small { color: var(--muted); }
.story-body { display: grid; gap: 54px; }
.story-body article { padding-bottom: 48px; border-bottom: 1px solid var(--line); }
.story-body h3 { margin: 0 0 15px; font-size: 28px; letter-spacing: -.035em; }
.story-body p { margin: 0; color: var(--muted); }
.voices { padding: 128px 0; }
.voices-head { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: end; margin-bottom: 56px; }
.voices-head p { margin: 0; color: var(--muted); justify-self: end; max-width: 390px; }
.voice-track { display: grid; grid-template-columns: .85fr 1.15fr .85fr; gap: 18px; }
.voice { min-height: 300px; padding: 32px; border: 1px solid var(--line); border-radius: 24px; display: flex; flex-direction: column; justify-content: space-between; }
.voice.featured { background: #eaf4ff; border-color: #cfe7ff; transform: translateY(-14px); }
.voice blockquote { margin: 0; font-size: 20px; line-height: 1.55; letter-spacing: -.02em; }
.voice footer { color: var(--muted); font-size: 13px; }
.pricing { padding: 128px 0; background: var(--night); color: white; }
.pricing-head { display: flex; justify-content: space-between; align-items: end; gap: 40px; margin-bottom: 52px; }
.pricing-head p { color: #aeb4bf; max-width: 390px; margin: 0; }
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.plan { min-height: 390px; padding: 34px; border: 1px solid #343842; border-radius: 26px; display: flex; flex-direction: column; }
.plan.recommended { background: white; color: var(--ink); border-color: white; }
.plan-label { color: #9da4af; font-size: 13px; }
.recommended .plan-label { color: var(--blue); }
.plan h3 { margin: 15px 0 5px; font-size: 34px; letter-spacing: -.04em; }
.plan p { margin: 0 0 26px; color: #aeb4bf; }
.recommended p { color: var(--muted); }
.plan ul { margin: 0 0 32px; padding: 0; list-style: none; color: #d5d8dd; font-size: 14px; }
.recommended ul { color: #444a54; }
.plan li { padding: 8px 0; border-bottom: 1px solid rgba(127,135,148,.2); }
.plan .button { margin-top: auto; width: 100%; }
.price-note { margin: 24px 0 0; color: #89919d; font-size: 13px; }
.faq { padding: 128px 0; }
.faq-layout { display: grid; grid-template-columns: .65fr 1.35fr; gap: 80px; }
.faq-layout header { position: sticky; top: 104px; align-self: start; }
.faq-stack { border-top: 1px solid var(--line); }
.faq-stack details { border-bottom: 1px solid var(--line); }
.faq-stack summary { cursor: pointer; list-style: none; padding: 26px 44px 26px 0; font-weight: 680; position: relative; }
.faq-stack summary::-webkit-details-marker { display: none; }
.faq-stack summary::after { content: "+"; position: absolute; right: 4px; font-size: 24px; font-weight: 350; color: var(--blue); }
.faq-stack details[open] summary::after { content: "−"; }
.faq-stack details p { margin: -6px 42px 24px 0; color: var(--muted); }
.final-cta { padding: 40px 0 120px; }
.cta-panel { min-height: 420px; border-radius: 34px; overflow: hidden; padding: 64px; color: white; background: #0d70d5; display: grid; grid-template-columns: 1fr .65fr; align-items: end; gap: 50px; }
.cta-panel h2 { margin: 0; font-size: clamp(40px, 5.7vw, 72px); line-height: 1; letter-spacing: -.055em; }
.cta-panel p { margin: 0 0 24px; color: #d8edff; }
.site-footer { padding: 64px 0 34px; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(4, 1fr); gap: 36px; }
.footer-brand p { max-width: 290px; color: var(--muted); font-size: 13px; }
.footer-col h3 { margin: 0 0 14px; font-size: 13px; }
.footer-col a { display: block; margin: 9px 0; color: var(--muted); font-size: 13px; }
.footer-col a:hover { color: var(--blue); }
.copyright { margin-top: 46px; padding-top: 22px; border-top: 1px solid var(--line); color: #858b95; font-size: 12px; display: flex; justify-content: space-between; gap: 20px; }
.page-hero { padding: 100px 0 70px; }
.page-hero .lead { max-width: 650px; }
.page-navline { margin-top: 42px; display: flex; flex-wrap: wrap; gap: 9px; }
.download-layout { padding: 50px 0 120px; display: grid; grid-template-columns: 310px 1fr; gap: 34px; align-items: start; }
.device-note { position: sticky; top: 96px; padding: 28px; border-radius: 24px; background: var(--night); color: white; }
.device-note h2 { margin: 0 0 12px; font-size: 23px; }
.device-note p { color: #aeb4bf; font-size: 14px; }
.device-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.device-card { min-height: 270px; padding: 30px; border: 1px solid var(--line); border-radius: 24px; display: flex; flex-direction: column; }
.device-card .device-icon { width: 44px; height: 44px; border-radius: 13px; background: var(--mist); display: grid; place-items: center; font-weight: 760; color: var(--blue); }
.device-card h2 { margin: 32px 0 7px; font-size: 24px; }
.device-card p { margin: 0 0 25px; color: var(--muted); font-size: 14px; }
.device-card .button { margin-top: auto; align-self: flex-start; }
.install-steps { padding: 100px 0; background: var(--mist); }
.steps { margin-top: 48px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 24px; overflow: hidden; }
.step { padding: 34px; background: white; }
.step small { color: var(--blue); font-weight: 760; }
.step h3 { margin: 42px 0 10px; }
.step p { color: var(--muted); font-size: 14px; }
.help-layout { padding: 20px 0 120px; display: grid; grid-template-columns: 280px 1fr; gap: 70px; }
.help-menu { position: sticky; top: 100px; align-self: start; padding: 24px; border: 1px solid var(--line); border-radius: 22px; }
.help-menu h2 { margin: 0 0 15px; font-size: 14px; }
.help-menu a { display: block; padding: 8px 0; color: var(--muted); font-size: 14px; }
.manual { display: grid; gap: 54px; }
.manual article { scroll-margin-top: 100px; padding-bottom: 48px; border-bottom: 1px solid var(--line); }
.manual .kicker { color: var(--blue); font-size: 12px; font-weight: 760; letter-spacing: .1em; }
.manual h2 { margin: 10px 0 18px; font-size: 34px; letter-spacing: -.04em; }
.manual p, .manual li { color: var(--muted); }
.manual ul { padding-left: 20px; }
.legal-note { padding: 22px; border-left: 3px solid var(--blue); background: var(--mist); }

/* Hero media integrity overrides: keep last and intentionally specific. */
.hero .hero-grid { align-items: center !important; }
.hero .hero-media { align-self: center !important; height: auto !important; min-height: 0 !important; max-height: none !important; padding: 0 !important; margin: 0 !important; overflow: visible !important; transform: none !important; clip-path: none !important; }
.hero .hero-media img { display: block !important; width: 100% !important; height: auto !important; min-height: 0 !important; max-height: none !important; margin: 0 !important; padding: 0 !important; object-fit: contain !important; object-position: center !important; transform: none !important; clip-path: none !important; border-radius: 34px !important; }

@media (max-width: 900px) {
  .nav-links { position: fixed; inset: 69px 20px auto; padding: 20px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.97); box-shadow: var(--shadow); display: none; flex-direction: column; align-items: stretch; gap: 14px; }
  .nav-links.open { display: flex; }
  .menu-toggle { display: inline-flex; }
  .nav-actions .button { display: none; }
  .hero { padding-top: 65px; }
  .hero-grid, .proof-grid, .story-grid, .faq-layout, .download-layout, .help-layout { grid-template-columns: 1fr; }
  .hero-media { order: -1; }
  .feature-stage { grid-template-columns: 1fr; }
  .feature-photo { min-height: 430px; grid-row: auto; }
  .feature-ribbon { grid-template-columns: repeat(2, 1fr); }
  .feature-intro, .voices-head, .pricing-head { align-items: start; flex-direction: column; display: flex; }
  .voice-track, .plans { grid-template-columns: 1fr; }
  .voice.featured { transform: none; }
  .story-index, .faq-layout header, .device-note, .help-menu { position: static; }
  .cta-panel { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
  .footer-brand { grid-row: span 2; }
}

@media (max-width: 620px) {
  .shell { width: min(100% - 28px, 1180px); }
  .display { font-size: 47px; }
  .hero { padding-top: 44px; }
  .hero-grid { gap: 30px; }
  .platform-row { align-items: flex-start; flex-direction: column; }
  .platforms { justify-content: flex-start; }
  .features, .voices, .pricing, .faq, .seo-story { padding: 86px 0; }
  .feature-photo { min-height: 300px; }
  .feature-card { min-height: 270px; padding: 28px; }
  .feature-ribbon, .device-grid, .steps { grid-template-columns: 1fr; }
  .device-card .button { width: 100%; min-width: 180px; }
  .cta-panel { padding: 38px 28px; min-height: 430px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; grid-row: auto; }
  .copyright { flex-direction: column; }
}

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

/* Mandatory final Hero image override — intentionally last in the cascade. */
.hero .hero-grid { align-items: center !important; }
.hero .hero-media { align-self: center !important; height: auto !important; min-height: 0 !important; max-height: none !important; padding: 0 !important; margin: 0 !important; overflow: visible !important; transform: none !important; clip-path: none !important; }
.hero .hero-media img { display: block !important; width: 100% !important; height: auto !important; min-height: 0 !important; max-height: none !important; margin: 0 !important; padding: 0 !important; object-fit: contain !important; object-position: center !important; transform: none !important; clip-path: none !important; border-radius: 34px !important; }