:root {
  --bg: #080b11;
  --surface: #101620;
  --surface-2: #151d29;
  --text: #f6f8fb;
  --muted: #a5b0c0;
  --line: rgba(255,255,255,.11);
  --accent: #22c8e5;
  --accent-2: #ff5b61;
  --accent-soft: #9bedfa;
  --container: 1160px;
  --radius: 24px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 86px; }
body { margin: 0; min-width: 320px; overflow-x: hidden; color: var(--text); background: var(--bg); font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif; font-size: 16px; line-height: 1.7; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
a, button { touch-action: manipulation; }
a:active, button:active { filter: brightness(.86); }
img { display: block; max-width: 100%; }
svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.skip-link { position: fixed; top: -70px; left: 15px; z-index: 200; padding: 10px 16px; border-radius: 9px; color: #071015; background: var(--accent); font-weight: 800; transition: top .2s; }
.skip-link:focus { top: 12px; }
:focus-visible { outline: 3px solid var(--accent-soft); outline-offset: 4px; }

.header { position: fixed; inset: 0 0 auto; z-index: 100; height: 76px; border-bottom: 1px solid transparent; transition: height .25s, background .25s, border-color .25s; }
.header.scrolled { height: 66px; border-color: var(--line); background: rgba(8,11,17,.9); backdrop-filter: blur(18px); }
.nav { height: 100%; display: flex; align-items: center; gap: 30px; }
.brand { display: inline-flex; align-items: center; gap: 11px; min-height: 44px; font-size: 19px; font-weight: 900; letter-spacing: -.7px; }
.brand-icon { width: 32px; height: 32px; color: var(--accent); stroke: none; }
.brand b { color: var(--accent); }
.nav-links { display: flex; gap: 30px; margin-left: auto; }
.nav-links a { min-height: 44px; display: inline-flex; align-items: center; color: #bdc6d3; font-size: 13px; font-weight: 700; transition: color .2s; }
.nav-links a:hover { color: var(--accent-soft); }
.nav-cta { min-height: 44px; padding: 0 18px; display: inline-flex; align-items: center; gap: 8px; border-radius: 999px; color: #061015; background: var(--accent); font-size: 13px; font-weight: 900; }
.nav-cta svg { width: 17px; }
.menu-toggle { display: none; width: 46px; height: 46px; margin-left: auto; padding: 0; border: 1px solid var(--line); border-radius: 12px; color: #fff; background: rgba(255,255,255,.04); cursor: pointer; }
.menu-toggle i { display: block; width: 20px; height: 2px; margin: 5px auto; background: currentColor; transition: transform .2s; }
.menu-toggle[aria-expanded="true"] i:first-child { transform: translateY(3.5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] i:last-child { transform: translateY(-3.5px) rotate(-45deg); }
.mobile-menu { position: fixed; inset: 66px 0 0; z-index: 99; padding: 18px 20px; background: rgba(8,11,17,.98); }
.mobile-menu a { min-height: 58px; display: flex; align-items: center; border-bottom: 1px solid var(--line); font-size: 17px; font-weight: 800; }
.mobile-menu .mobile-cta { justify-content: center; margin-top: 20px; border: 0; border-radius: 13px; color: #071015; background: var(--accent); }

.hero { position: relative; min-height: 790px; padding: 142px 0 100px; display: flex; align-items: center; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 72% 15%, color-mix(in srgb, var(--accent) 17%, transparent), transparent 34%), radial-gradient(circle at 10% 82%, color-mix(in srgb, var(--accent-2) 9%, transparent), transparent 30%), linear-gradient(180deg,#0a0e15,var(--bg)); }
.grid-bg { position: absolute; inset: 0; opacity: .08; background-image: linear-gradient(rgba(255,255,255,.18) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.18) 1px,transparent 1px); background-size: 56px 56px; mask-image: linear-gradient(#000,transparent 90%); }
.hero-layout { position: relative; display: grid; grid-template-columns: .96fr 1.04fr; gap: 72px; align-items: center; }
.eyebrow,.kicker { color: var(--accent); font: 800 12px/1.2 monospace; letter-spacing: .18em; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin-bottom: 20px; }
.eyebrow::before { content: ""; width: 26px; height: 1px; background: currentColor; }
h1,h2,h3,p { margin-top: 0; }
h1 { margin-bottom: 24px; font-size: clamp(44px,5.2vw,72px); line-height: 1.04; letter-spacing: -3.8px; font-weight: 950; }
h1 em,h2 em { color: var(--accent); font-style: normal; }
.lead { max-width: 625px; margin-bottom: 32px; color: #b0bac8; font-size: 17px; line-height: 1.9; }
.actions { display: flex; flex-wrap: wrap; gap: 13px; }
.button { min-height: 52px; padding: 0 21px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; border-radius: 13px; font-size: 14px; font-weight: 900; transition: transform .2s, background .2s, box-shadow .2s; }
.button svg { width: 19px; }
.button.primary { color: #061015; background: var(--accent); box-shadow: 0 14px 36px color-mix(in srgb, var(--accent) 18%, transparent); }
.button.secondary { border: 1px solid var(--line); background: rgba(255,255,255,.035); }
.button:hover { transform: translateY(-3px); }
.hero-points { display: flex; flex-wrap: wrap; gap: 12px 18px; margin: 26px 0 0; padding: 0; color: #a1acbb; font-size: 12px; font-weight: 700; list-style: none; }
.hero-points li { display: flex; align-items: center; gap: 6px; }
.hero-points li::before { content: "✓"; color: var(--accent); font-weight: 900; }
.device-stage { position: relative; min-height: 500px; display: grid; place-items: center; }
.orbit { position: absolute; width: 480px; aspect-ratio: 1; border: 1px solid color-mix(in srgb,var(--accent) 24%,transparent); border-radius: 50%; opacity: .55; }
.orbit::after { content: ""; position: absolute; top: 8%; left: 18%; width: 8px; aspect-ratio: 1; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 16px var(--accent-2); }
.device { position: relative; z-index: 2; width: min(100%,570px); padding: 12px; border: 1px solid rgba(255,255,255,.16); border-radius: 27px; background: linear-gradient(145deg,#303846,#121720 60%); box-shadow: 0 40px 90px rgba(0,0,0,.52),0 0 70px color-mix(in srgb,var(--accent) 8%,transparent); transform: perspective(1200px) rotateY(-6deg) rotateX(2deg); }
.device-bar { height: 18px; display: flex; align-items: center; gap: 5px; padding-left: 5px; }
.device-bar i { width: 5px; aspect-ratio: 1; border-radius: 50%; background: #697485; }
.device-screen { position: relative; aspect-ratio: 1.46; overflow: hidden; border-radius: 16px; background: #0d1118; }
.device-screen img { width: 100%; height: 100%; object-fit: cover; object-position: center; filter: brightness(.66) saturate(.9) contrast(1.06); }
.device-screen::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg,transparent,rgba(3,6,10,.32)); }
.live { position: absolute; z-index: 1; left: 17px; top: 16px; display: inline-flex; align-items: center; gap: 7px; font: 800 8px/1 monospace; letter-spacing: .12em; }
.live::before { content: ""; width: 7px; aspect-ratio: 1; border-radius: 50%; background: #77e4a7; box-shadow: 0 0 9px #77e4a7; }
.visual-badge { position: absolute; z-index: 3; right: -8px; top: 55px; min-width: 105px; padding: 18px 15px; border: 1px solid var(--line); border-radius: 20px; background: rgba(15,21,30,.88); box-shadow: 0 20px 45px rgba(0,0,0,.3); backdrop-filter: blur(12px); text-align: center; }
.visual-badge strong { display: block; color: var(--accent); font: 900 26px/1 Arial; }.visual-badge span { color: var(--muted); font-size: 12px; }
.visual-note { position: absolute; z-index: 3; left: -25px; bottom: 55px; max-width: 190px; padding: 14px 17px; border-left: 3px solid var(--accent-2); border-radius: 8px 15px 15px 8px; background: rgba(15,21,30,.9); box-shadow: 0 20px 40px rgba(0,0,0,.28); }
.visual-note strong { display: block; font-size: 12px; }.visual-note span { color: var(--muted); font-size: 12px; }

.signal { border-block: 1px solid var(--line); background: #0d121a; }
.signal-grid { display: grid; grid-template-columns: repeat(4,1fr); }
.signal-item { min-height: 108px; padding: 24px 25px; display: flex; align-items: center; gap: 14px; border-right: 1px solid var(--line); }
.signal-item:last-child { border-right: 0; }
.signal-item b { color: var(--accent); font: 900 12px/1 monospace; }.signal-item span { display: grid; font-size: 13px; font-weight: 850; }.signal-item small { margin-top: 3px; color: #9aa5b5; font-size: 12px; font-weight: 500; }

.section { position: relative; padding: 108px 0; }
.heading { max-width: 760px; margin: 0 auto 50px; text-align: center; }
.heading h2,.about-title h2 { margin: 10px 0 16px; font-size: clamp(35px,4vw,52px); line-height: 1.16; letter-spacing: -2.4px; }
.heading p { margin-bottom: 0; color: var(--muted); }
.about { background: linear-gradient(180deg,#0b0f16,var(--bg)); }
.about-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 100px; align-items: start; }
.about-title { position: sticky; top: 100px; }
.about-copy { max-width: 720px; }
.about-copy > p { color: #b3bdca; font-size: 16px; line-height: 2; }
.about-copy > p strong { color: var(--text); }
.topic-nav { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 30px; padding-top: 26px; border-top: 1px solid var(--line); }
.topic-nav a { min-height: 44px; padding: 0 15px; display: inline-flex; align-items: center; border: 1px solid var(--line); border-radius: 999px; color: #cad2dc; font-size: 12px; font-weight: 800; transition: color .2s,background .2s,border-color .2s; }
.topic-nav a:hover { color: #061015; border-color: var(--accent); background: var(--accent); }

.features { background: #0b0f16; }
.feature-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }
.feature-card { min-height: 285px; padding: 27px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 21px; background: linear-gradient(145deg,rgba(255,255,255,.045),rgba(255,255,255,.012)); transition: transform .25s,border-color .25s; }
.feature-card:hover { transform: translateY(-5px); border-color: color-mix(in srgb,var(--accent) 45%,transparent); }
.feature-icon { width: 52px; aspect-ratio: 1; margin-bottom: 50px; display: grid; place-items: center; border: 1px solid color-mix(in srgb,var(--accent) 36%,transparent); border-radius: 15px; color: var(--accent); background: color-mix(in srgb,var(--accent) 6%,transparent); }
.feature-icon svg { width: 25px; }
.feature-card h3 { margin-bottom: 11px; font-size: 19px; }.feature-card p { margin: 0; color: var(--muted); font-size: 13px; }

.compat-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 85px; align-items: center; }
.library-art { position: relative; min-height: 500px; }
.library-art img { position: absolute; inset: 0 auto auto 0; width: 76%; height: 470px; object-fit: cover; object-position: 50% 18%; border: 1px solid var(--line); border-radius: 25px; filter: brightness(.68) saturate(.82); box-shadow: 0 32px 75px rgba(0,0,0,.4); transform: rotate(-2.5deg); }
.art-card { position: absolute; right: 0; bottom: 22px; width: 54%; padding: 23px; border: 1px solid color-mix(in srgb,var(--accent) 32%,transparent); border-radius: 19px; background: rgba(15,21,30,.92); box-shadow: 0 25px 55px rgba(0,0,0,.42); }
.art-card b { display: block; color: var(--accent); font: 900 12px/1 monospace; letter-spacing: .1em; }.art-card strong { display: block; margin: 10px 0 5px; font-size: 20px; }.art-card span { color: var(--muted); font-size: 12px; }
.compat-copy h2 { margin: 9px 0 20px; font-size: clamp(34px,3.8vw,50px); line-height: 1.16; letter-spacing: -2.3px; }.compat-copy > p { color: var(--muted); }
.specs { display: grid; grid-template-columns: 1fr 1fr; margin: 28px 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.spec { min-height: 105px; padding: 17px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }.spec span { display: block; color: #9ba6b5; font-size: 12px; }.spec strong { font-size: 14px; }
.notice-inline { display: flex; gap: 10px; color: #a7b1bf; font-size: 12px; }.notice-inline svg { flex: 0 0 auto; width: 18px; color: #e4b951; }

.setup { background: #0b0f16; }
.steps { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; margin: 0; padding: 0; list-style: none; counter-reset: step; }
.step { min-height: 250px; padding: 26px; border: 1px solid var(--line); border-radius: 20px; background: #0e141d; }
.step-num { display: inline-flex; margin-bottom: 45px; color: var(--accent); font: 900 12px/1 monospace; }.step h3 { margin-bottom: 10px; font-size: 18px; }.step p { margin: 0; color: var(--muted); font-size: 13px; }

.faq-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 90px; align-items: start; }
.faq-intro h2 { margin: 10px 0 20px; font-size: clamp(34px,3.8vw,50px); line-height: 1.16; letter-spacing: -2.3px; }.faq-intro p { color: var(--muted); }
.faq-list { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 20px; cursor: pointer; font-size: 15px; font-weight: 850; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; flex: 0 0 auto; width: 28px; aspect-ratio: 1; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; color: var(--muted); font-size: 17px; font-weight: 400; transition: transform .2s,border-color .2s; }
details[open] summary::after { border-color: var(--accent); transform: rotate(45deg); }
details p { margin: -3px 45px 26px 0; color: var(--muted); font-size: 13px; }

.search-intent { background: #090d14; }
.search-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 13px; }
.search-card { min-height: 152px; padding: 22px; border: 1px solid var(--line); border-radius: 17px; background: rgba(255,255,255,.025); transition: transform .2s,border-color .2s,background .2s; }
.search-card:hover { transform: translateY(-3px); border-color: color-mix(in srgb,var(--accent) 55%,transparent); background: rgba(255,255,255,.045); }
.search-card h3 { margin: 0 0 9px; font-size: 16px; line-height: 1.45; }
.search-card h3 a { color: #f3f6fa; text-decoration: none; }
.search-card h3 a::after { content: " ↗"; color: var(--accent); font-size: 13px; }
.search-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.75; }

.download { overflow: hidden; background: #0b0f16; }
.download::before { content: ""; position: absolute; left: 50%; top: 0; width: 720px; height: 420px; border-radius: 50%; background: color-mix(in srgb,var(--accent) 10%,transparent); filter: blur(110px); transform: translateX(-50%); }
.download-box { position: relative; padding: 58px; display: grid; grid-template-columns: 1.1fr .9fr; gap: 60px; align-items: center; border: 1px solid color-mix(in srgb,var(--accent) 32%,transparent); border-radius: 28px; background: linear-gradient(145deg,rgba(255,255,255,.055),rgba(255,255,255,.014)); }
.download-copy h2 { margin: 10px 0 17px; font-size: clamp(35px,4vw,52px); line-height: 1.15; letter-spacing: -2.4px; }.download-copy p { margin: 0; color: var(--muted); }
.download-panel { padding: 27px; border: 1px solid var(--line); border-radius: 19px; background: rgba(7,10,15,.55); }
.download-meta { display: flex; justify-content: space-between; gap: 16px; margin-bottom: 20px; }.download-meta span { color: #9ba6b5; font-size: 12px; }.download-meta strong { font-size: 13px; }
.download-button { min-height: 52px; padding: 0 18px; display: flex; align-items: center; justify-content: space-between; border-radius: 12px; color: #061015; background: var(--accent); font-size: 13px; font-weight: 900; transition: filter .2s,transform .2s; }.download-button:hover { transform: translateY(-2px); filter: brightness(1.07); }.download-button svg { width: 19px; }
.platform-title { margin: 20px 0 9px; color: #c8d0db; font-size: 12px; font-weight: 800; }
.platform-downloads { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 9px; }
.platform-download { min-height: 46px; padding: 0 12px; display: flex; align-items: center; justify-content: space-between; gap: 8px; border: 1px solid var(--line); border-radius: 10px; color: #d8dee7; background: rgba(255,255,255,.035); font-size: 12px; font-weight: 750; transition: color .2s,border-color .2s,background .2s; }
.platform-download:hover { color: #fff; border-color: color-mix(in srgb,var(--accent) 55%,transparent); background: color-mix(in srgb,var(--accent) 8%,transparent); }
.platform-download svg { flex: 0 0 auto; width: 16px; }
.legal { margin: 19px 0 0; color: #99a4b4; font-size: 12px; line-height: 1.7; }

.footer { border-top: 1px solid var(--line); background: #06080c; }
.footer-main { min-height: 138px; display: grid; grid-template-columns: 1fr 1.5fr 1fr; gap: 30px; align-items: center; }.footer-main > p { margin: 0; color: var(--muted); font-size: 12px; text-align: center; }.back-top { justify-self: end; min-height: 44px; display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 12px; font-weight: 800; }.back-top svg { width: 17px; }
.footer-note { min-height: 60px; padding-block: 18px; display: flex; align-items: center; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); }.footer-note p { margin: 0; color: #8f9aab; font-size: 12px; }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity .48s ease,transform .48s cubic-bezier(.2,.7,.2,1); transition-delay: var(--delay,0ms); }.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .nav-links { gap: 18px; }.nav-links a { font-size: 12px; }
  .hero-layout { grid-template-columns: 1fr 1fr; gap: 38px; }.device-stage { min-height: 440px; }
  .about-layout,.faq-layout { gap: 55px; }.feature-grid { grid-template-columns: 1fr 1fr; }.compat-layout { gap: 55px; }
}

@media (max-width: 800px) {
  .header { height: 66px; }.nav-links,.nav-cta { display: none; }.menu-toggle { display: block; }
  .hero { min-height: auto; padding-top: 118px; }.hero-layout { grid-template-columns: 1fr; text-align: center; }.hero-copy { display: flex; flex-direction: column; align-items: center; }.lead { max-width: 650px; }.actions,.hero-points { justify-content: center; }.device-stage { width: min(92%,620px); margin: 0 auto; }
  .signal-grid { grid-template-columns: 1fr 1fr; }.signal-item:nth-child(2) { border-right: 0; }.signal-item:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section { padding: 84px 0; }.about-layout,.faq-layout,.compat-layout { grid-template-columns: 1fr; }.about-title { position: static; }.about-title h2 br { display: none; }.compat-copy { order: -1; }
  .steps { grid-template-columns: 1fr 1fr; }.download-box { grid-template-columns: 1fr; gap: 35px; }.footer-main { grid-template-columns: 1fr 1fr; }.footer-main > p { display: none; }
}

@media (max-width: 540px) {
  .container { width: min(calc(100% - 28px),var(--container)); }
  h1 { font-size: clamp(40px,13vw,56px); letter-spacing: -2.7px; }.lead { font-size: 15px; line-height: 1.85; }.actions,.button { width: 100%; }.hero-points { gap: 9px 13px; }.device-stage { width: 100%; min-height: 350px; }.device { padding: 8px; border-radius: 20px; transform: none; }.device-screen { border-radius: 12px; }.orbit { display: none; }.visual-badge { right: -4px; top: 28px; min-width: 84px; padding: 14px 10px; }.visual-badge strong { font-size: 22px; }.visual-note { left: -4px; bottom: 30px; }
  .signal-item { min-height: 90px; padding: 16px 11px; }.signal-item span { font-size: 12px; }.signal-item small { font-size: 12px; }
  .section { padding: 70px 0; }.heading { margin-bottom: 38px; }.heading h2,.about-title h2,.compat-copy h2,.faq-intro h2,.download-copy h2 { font-size: 35px; letter-spacing: -1.7px; }.about-title h2 br { display: block; }.about-copy > p { font-size: 16px; line-height: 1.9; }.topic-nav a { flex: 1 1 calc(33.333% - 9px); justify-content: center; padding-inline: 9px; }
  .feature-grid,.steps,.search-grid { grid-template-columns: 1fr; }.feature-card { min-height: 255px; }.feature-icon { margin-bottom: 36px; }.step { min-height: 210px; }.step-num { margin-bottom: 32px; }
  .library-art { min-height: 425px; }.library-art img { height: 390px; }.art-card { width: 66%; bottom: 0; }.specs { grid-template-columns: 1fr; }
  summary { min-height: 72px; font-size: 14px; }.download-box { padding: 29px 21px; }.download-panel { padding: 21px; }.platform-downloads { grid-template-columns: 1fr; }
  .footer-main { padding-block: 32px; grid-template-columns: 1fr; }.footer-main .brand,.back-top { justify-self: center; }.footer-note { flex-direction: column; justify-content: center; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,*::before,*::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}