:root {
  --ink: #173042;
  --ink-soft: #335368;
  --navy: #eaf9ff;
  --cyan: #4fc3f7;
  --cyan-strong: #29b6f6;
  --cyan-pale: #e5f7ff;
  --paper: #f7fbfd;
  --white: #ffffff;
  --muted: #657d8d;
  --line: #d9eaf2;
  --radius: 28px;
  --container: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body, button, a { -webkit-tap-highlight-color: transparent; }

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }

.container {
  width: min(var(--container), calc(100% - 48px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(105, 172, 205, .18);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(18px);
}

.nav-inner { height: 72px; display: flex; align-items: center; gap: 28px; }

.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: -.02em; }
.brand img { width: 42px; height: 42px; border-radius: 13px; box-shadow: 0 0 0 1px rgba(59,172,224,.16), 0 8px 20px rgba(67,178,227,.12); }
.site-header .brand { color: var(--ink); }

.main-nav { display: flex; align-items: center; gap: 30px; margin-left: auto; }
.main-nav a { color: #607c8e; font-size: 14px; font-weight: 650; transition: color .2s ease; }
.main-nav a:hover { color: #139bd2; }

.nav-download {
  display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 0 20px;
  border-radius: 999px; background: var(--cyan); color: #0b3d54; font-size: 14px; font-weight: 850;
  box-shadow: 0 8px 28px rgba(54, 180, 236, .2); transition: transform .2s ease, background .2s ease;
}
.nav-download:hover { transform: translateY(-2px); background: #8bdeff; }

.hero {
  position: relative; min-height: 740px; display: flex; align-items: center; overflow: hidden; color: var(--ink);
  background: radial-gradient(circle at 78% 42%, rgba(79, 195, 247, .24), transparent 34%), radial-gradient(circle at 8% 85%, rgba(139, 222, 255, .2), transparent 28%), linear-gradient(135deg, #ffffff 0%, #f4fbfe 54%, #eaf8fe 100%);
}

.hero-grid, .final-grid {
  position: absolute; inset: 0; opacity: .16; pointer-events: none;
  background-image: linear-gradient(rgba(48,166,220,.18) 1px, transparent 1px), linear-gradient(90deg, rgba(48,166,220,.18) 1px, transparent 1px);
  background-size: 64px 64px; mask-image: linear-gradient(to bottom, rgba(0,0,0,.9), transparent 90%);
}

.hero-orb { position: absolute; border-radius: 50%; filter: blur(1px); opacity: .55; pointer-events: none; }
.hero-orb-one { width: 520px; height: 520px; right: -280px; top: -230px; border: 1px solid rgba(66,181,231,.28); box-shadow: 0 0 100px rgba(47,189,255,.08) inset; }
.hero-orb-two { width: 280px; height: 280px; left: -150px; bottom: -150px; border: 50px solid rgba(88,201,255,.08); }

.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.04fr .96fr; gap: 80px; align-items: center; padding-block: 76px 68px; }
.hero-copy { padding-top: 10px; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin-bottom: 24px; color: #129bd3; font-size: 13px; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
.eyebrow span { width: 30px; height: 2px; background: var(--cyan); box-shadow: 0 0 14px var(--cyan); }
.hero h1 { margin: 0; font-size: clamp(44px, 5.7vw, 76px); line-height: .98; letter-spacing: -.055em; font-weight: 900; }
.hero h1 > span { display: block; margin-top: 18px; font-size: .55em; line-height: 1.15; letter-spacing: -.045em; color: #159ed7; }
.hero-lead { max-width: 620px; margin: 28px 0 32px; color: #617c8e; font-size: 18px; line-height: 1.8; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 54px; padding: 0 24px; border-radius: 15px; font-size: 15px; font-weight: 850; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--cyan); color: #0a3d55; box-shadow: 0 14px 34px rgba(52, 190, 252, .22); }
.button-primary:hover { box-shadow: 0 18px 40px rgba(52, 190, 252, .34); }
.button-secondary { border: 1px solid #cce3ed; color: #32576b; background: rgba(255,255,255,.82); }
.button-secondary:hover { border-color: #71c9ef; }
.android-mark { position: relative; display: block; width: 22px; height: 22px; flex: 0 0 auto; border-radius: 7px; background: #0b4c69; }
.android-mark::before { position: absolute; width: 14px; height: 9px; top: 8px; left: 4px; border-radius: 7px 7px 2px 2px; background: radial-gradient(circle at 4px 4px, #0b4c69 1px, transparent 1.5px), radial-gradient(circle at 10px 4px, #0b4c69 1px, transparent 1.5px), #8de1ff; content: ""; }
.android-mark i::before,
.android-mark i::after { position: absolute; width: 1.5px; height: 5px; top: 4px; border-radius: 2px; background: #8de1ff; content: ""; transform-origin: bottom; }
.android-mark i::before { left: 7px; transform: rotate(-34deg); }
.android-mark i::after { right: 7px; transform: rotate(34deg); }

.release-line { display: flex; gap: 0; margin-top: 36px; color: #71899a; font-size: 12px; }
.release-line span { padding: 0 22px; border-right: 1px solid #d7e7ee; }
.release-line span:first-child { padding-left: 0; }
.release-line span:last-child { border-right: 0; }
.release-line b { display: block; color: var(--ink); font-size: 14px; }
.compatibility-note { margin: 16px 0 0; color: #7891a2; font-size: 12px; }
.compatibility-note strong { color: #178fc1; }

.hero-visual { position: relative; height: 590px; display: grid; place-items: center; }
.phone-glow {
  position: absolute; width: 420px; height: 420px; border-radius: 50%; background: rgba(67,196,255,.22); filter: blur(60px);
  animation: phone-glow-pulse 4.8s ease-in-out infinite;
}
.phone-shell {
  position: relative; z-index: 2; width: 292px; height: 580px; overflow: hidden; padding: 9px; border: 1px solid rgba(73,176,222,.3); border-radius: 46px;
  background: linear-gradient(145deg, #dff5fd, #75cdf2 42%, #d9f2fb); box-shadow: 0 38px 80px rgba(39,132,175,.22), 0 0 0 7px rgba(74,188,238,.09);
  transform: rotate(2deg); animation: phone-float 5.6s ease-in-out infinite;
}
.phone-shell img { width: 100%; height: 100%; object-fit: cover; border-radius: 37px; }
.phone-speaker { position: absolute; z-index: 3; top: 16px; left: 50%; width: 74px; height: 18px; border-radius: 20px; background: #bdddea; transform: translateX(-50%); }

.float-card { position: absolute; z-index: 4; border: 1px solid rgba(83,188,234,.28); background: rgba(255,255,255,.9); backdrop-filter: blur(15px); box-shadow: 0 20px 45px rgba(42,132,170,.18); }
.float-card small { display: block; color: #718a9a; font-size: 11px; }
.float-fps { top: 88px; right: -22px; width: 150px; padding: 17px 19px; border-radius: 18px; animation: card-float-right 4.2s ease-in-out .35s infinite; }
.float-fps strong { display: block; color: var(--ink); font-size: 33px; line-height: 1.15; }
.float-fps em { color: #159ed7; font-size: 10px; font-style: normal; letter-spacing: .1em; }
.float-fps span { color: #78909f; font-size: 10px; }
.float-clear { left: -10px; bottom: 85px; display: grid; grid-template-columns: 10px 1fr; column-gap: 9px; align-items: center; padding: 16px 19px; border-radius: 17px; animation: card-float-left 4.8s ease-in-out .8s infinite; }
.float-clear b { color: #294c60; font-size: 13px; }
.float-clear small { grid-column: 2; }
.status-dot { width: 9px; height: 9px; border-radius: 50%; background: #5dffb3; box-shadow: 0 0 12px #5dffb3; animation: status-pulse 2.2s ease-out infinite; }

@keyframes phone-float {
  0%, 100% { transform: translateY(0) rotate(2deg); }
  50% { transform: translateY(-9px) rotate(1.25deg); }
}

@keyframes phone-glow-pulse {
  0%, 100% { opacity: .58; transform: scale(.94); }
  50% { opacity: .9; transform: scale(1.08); }
}

@keyframes card-float-right {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-11px); }
}

@keyframes card-float-left {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(9px); }
}

@keyframes status-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(93,255,179,.45), 0 0 12px #5dffb3; }
  55% { box-shadow: 0 0 0 8px rgba(93,255,179,0), 0 0 18px #5dffb3; }
}

.quick-facts { border-bottom: 1px solid var(--line); background: #fff; }
.facts-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.facts-grid > div { min-height: 114px; padding: 26px 30px; border-right: 1px solid var(--line); }
.facts-grid > div:first-child { border-left: 1px solid var(--line); }
.facts-grid strong, .facts-grid span { display: block; }
.facts-grid strong { font-size: 17px; letter-spacing: -.02em; }
.facts-grid span { margin-top: 3px; color: var(--muted); font-size: 13px; }
.facts-grid .no-break { display: inline; white-space: nowrap; font-style: normal; }

.section { padding: 112px 0; }
.section-kicker { display: inline-block; margin-bottom: 18px; color: #129edb; font-size: 12px; font-weight: 900; letter-spacing: .15em; }
.section-heading h2, .balance-copy h2, .faq-intro h2, .guide-intro h2 { margin: 0; font-size: clamp(34px, 4.5vw, 52px); line-height: 1.15; letter-spacing: -.05em; }
.section-heading p { color: var(--muted); }
.split-heading { display: grid; grid-template-columns: 1fr .8fr; gap: 90px; align-items: end; margin-bottom: 52px; }
.split-heading p { margin: 0 0 5px; font-size: 16px; line-height: 1.85; }

.features-section { background: var(--paper); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff; box-shadow: 0 24px 70px rgba(26,53,76,.07); }
.feature-card { min-height: 360px; padding: 30px; border-right: 1px solid var(--line); }
.feature-card:last-child { border-right: 0; }
.feature-card:nth-child(even) { background: #f9fbfd; }
.feature-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 65px; }
.feature-mark { display: grid; place-items: center; width: 56px; height: 56px; border-radius: 17px; background: var(--cyan-pale); color: #0689c3; font-size: 17px; font-weight: 950; box-shadow: inset 0 0 0 1px rgba(51,183,241,.15); }
.feature-index { color: #a2b1be; font-family: ui-monospace, monospace; font-size: 12px; }
.feature-card h3 { margin: 0 0 14px; font-size: 21px; letter-spacing: -.03em; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.85; }

.balance-section { background: #fff; }
.balance-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 88px; align-items: center; }
.balance-demo { position: relative; min-height: 470px; display: grid; grid-template-columns: 1fr 1fr; overflow: hidden; border: 1px solid #cceaf6; border-radius: 32px; background: linear-gradient(145deg, #f8fdff, #dff5fe); box-shadow: 0 30px 70px rgba(52,135,171,.14); }
.demo-panel { position: relative; padding: 34px; color: #254c61; overflow: hidden; }
.demo-panel > span { display: inline-block; padding: 6px 10px; border: 1px solid rgba(67,160,202,.26); border-radius: 999px; font-size: 11px; }
.demo-panel strong { display: block; margin-top: 12px; font-size: 22px; }
.demo-soft { filter: saturate(.45); opacity: .8; }
.demo-landscape { position: absolute; inset: 140px 20px 20px; border-radius: 22px; background: radial-gradient(circle at 68% 22%, #ffffff 0 7%, transparent 8%), linear-gradient(155deg, transparent 0 47%, rgba(255,255,255,.36) 48% 50%, transparent 51%), linear-gradient(28deg, #b7e5f7 0 42%, #72c9ec 43% 62%, #3fb2e1 63% 100%); }
.demo-soft .demo-landscape { filter: blur(5px); }
.demo-landscape i { position: absolute; bottom: 0; width: 10px; border-radius: 8px 8px 0 0; background: rgba(25,94,124,.52); }
.demo-landscape i:nth-child(1) { left: 18%; height: 38%; }
.demo-landscape i:nth-child(2) { left: 44%; height: 58%; }
.demo-landscape i:nth-child(3) { right: 16%; height: 29%; }
.demo-divider { position: absolute; z-index: 5; left: 50%; top: 0; bottom: 0; width: 1px; background: rgba(44,144,187,.5); }
.demo-divider:before { content: "↔"; position: absolute; top: 50%; left: 50%; display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; background: var(--cyan); color: #062033; font-weight: 900; transform: translate(-50%,-50%); box-shadow: 0 8px 30px rgba(0,0,0,.3); }
.demo-divider span { position: absolute; left: 50%; bottom: 20px; white-space: nowrap; color: #357b98; font-size: 10px; transform: translateX(-50%); }
.balance-copy > p { margin: 24px 0 32px; color: var(--muted); line-height: 1.9; }
.balance-copy ul { display: grid; gap: 14px; padding: 0; margin: 0; list-style: none; }
.balance-copy li { display: grid; grid-template-columns: 44px 1fr; gap: 14px; align-items: center; padding: 15px 0; border-top: 1px solid var(--line); }
.balance-copy li > span { color: #21aeea; font: 800 12px ui-monospace, monospace; }
.balance-copy b, .balance-copy small { display: block; }
.balance-copy b { font-size: 15px; }
.balance-copy small { margin-top: 3px; color: var(--muted); font-size: 12px; }

.screens-section { overflow: hidden; background: linear-gradient(180deg, #eefaff, #f9fdff); color: var(--ink); }
.centered-heading { max-width: 680px; margin: 0 auto 54px; text-align: center; }
.centered-heading p { color: var(--muted); }
.screen-track { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.screen-card { margin: 0; }
.screen-frame { overflow: hidden; padding: 8px; border: 1px solid #cce7f2; border-radius: 27px; background: #ffffff; box-shadow: 0 24px 55px rgba(48,132,168,.14); }
.screen-frame img { width: 100%; border-radius: 20px; }
.screen-card figcaption { padding: 17px 4px 0; }
.screen-card figcaption b, .screen-card figcaption span { display: block; }
.screen-card figcaption b { font-size: 15px; }
.screen-card figcaption span { margin-top: 3px; color: #748b99; font-size: 12px; }

.guide-section { background: #f5fbfe; }
.guide-shell { display: grid; grid-template-columns: .8fr 1.2fr; overflow: hidden; border-radius: 32px; background: #fff; box-shadow: 0 25px 80px rgba(24,55,78,.09); }
.guide-intro { padding: 58px; color: #164258; background: linear-gradient(145deg, #ccefff, #72d0f6); }
.guide-intro h2 { font-size: 42px; }
.guide-intro p { margin: 22px 0 36px; color: #376b83; }
.guide-intro a { display: inline-flex; align-items: center; gap: 12px; padding-bottom: 8px; border-bottom: 1px solid #087fae; color: #087ba8; font-size: 14px; font-weight: 800; }
.steps-list { padding: 20px 54px; margin: 0; list-style: none; }
.steps-list li { display: grid; grid-template-columns: 52px 1fr; gap: 20px; padding: 31px 0; border-bottom: 1px solid var(--line); }
.steps-list li:last-child { border-bottom: 0; }
.steps-list li > span { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 14px; background: var(--cyan-pale); color: #098dc5; font: 900 12px ui-monospace, monospace; }
.steps-list h3 { margin: 0 0 6px; font-size: 18px; }
.steps-list p { margin: 0; color: var(--muted); font-size: 13px; }

.faq-section { background: #fff; }
.faq-grid { display: grid; grid-template-columns: .65fr 1.35fr; gap: 100px; align-items: start; }
.faq-intro { position: sticky; top: 110px; }
.faq-intro p { color: var(--muted); }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { display: flex; justify-content: space-between; gap: 25px; padding: 24px 0; cursor: pointer; list-style: none; font-size: 17px; font-weight: 800; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary i { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: #edf7fb; color: #168ec0; font-style: normal; transition: transform .2s ease; }
.faq-list details[open] summary i { transform: rotate(45deg); }
.faq-list details p { max-width: 680px; padding: 0 48px 26px 0; margin: -5px 0 0; color: var(--muted); line-height: 1.9; }

.final-cta { position: relative; overflow: hidden; padding: 100px 0; color: #123f55; background: radial-gradient(circle at 90% 0, rgba(255,255,255,.38), transparent 36%), linear-gradient(135deg, #65cef8, #a5e7ff); }
.final-grid { opacity: .12; }
.final-inner { position: relative; z-index: 2; text-align: center; }
.final-brand { display: inline-flex; align-items: center; gap: 14px; text-align: left; }
.final-brand img { width: 66px; height: 66px; border-radius: 20px; }
.final-brand span, .final-brand small { display: block; }
.final-brand span { font-size: 18px; font-weight: 900; }
.final-brand small { color: #34728e; }
.final-cta h2 { margin: 38px 0; font-size: clamp(38px, 5.2vw, 62px); line-height: 1.12; letter-spacing: -.055em; }
.button-light { background: #fff; color: #07698e; box-shadow: 0 18px 40px rgba(22,110,146,.17); }
.final-meta { display: flex; justify-content: center; gap: 26px; margin-top: 28px; color: #3c7590; font-size: 12px; }

.site-footer { padding: 54px 0; border-top: 1px solid #dcecf3; background: #f3fbfe; color: var(--ink); }
.footer-inner { display: grid; grid-template-columns: 1fr auto auto; gap: 70px; align-items: end; }
.footer-logo img { width: 38px; height: 38px; border-radius: 11px; }
.footer-inner > div > p { margin: 12px 0 0; color: #748b99; font-size: 12px; }
.footer-inner nav { display: flex; gap: 24px; color: #607d8d; font-size: 12px; }
.footer-inner nav a:hover { color: #159ed7; }
.copyright { margin: 0; color: #7c929f; font-size: 11px; text-align: right; }

@media (max-width: 1000px) {
  .main-nav { display: none; }
  .nav-download { margin-left: auto; }
  .hero-inner { grid-template-columns: 1fr .8fr; gap: 35px; }
  .hero h1 { font-size: 55px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card { min-height: 300px; border-bottom: 1px solid var(--line); }
  .feature-card:nth-child(2) { border-right: 0; }
  .feature-card:nth-child(n+3) { border-bottom: 0; }
  .feature-top { margin-bottom: 42px; }
  .balance-grid { gap: 45px; }
  .faq-grid { gap: 50px; }
}

@media (max-width: 760px) {
  .container { width: min(100% - 32px, var(--container)); }
  .site-header .brand span { display: none; }
  .nav-inner { height: 64px; }
  .nav-download { min-height: 38px; padding: 0 16px; font-size: 12px; }
  .hero { min-height: auto; }
  .hero-inner { grid-template-columns: 1fr; padding-block: 65px 52px; text-align: center; }
  .eyebrow { justify-content: center; }
  .hero h1 { font-size: clamp(42px, 13vw, 58px); }
  .hero-lead { margin-inline: auto; font-size: 16px; }
  .hero-actions { justify-content: center; }
  .release-line { justify-content: center; }
  .release-line span { padding: 0 12px; }
  .hero-visual { height: 530px; margin-top: 15px; }
  .phone-shell { width: 250px; height: 500px; }
  .float-fps { right: 0; top: 55px; }
  .float-clear { left: 0; bottom: 65px; }
  .facts-grid { grid-template-columns: repeat(2, 1fr); }
  .facts-grid > div { min-height: 95px; padding: 20px; border-bottom: 1px solid var(--line); }
  .facts-grid > div:nth-child(2) { border-right: 1px solid var(--line); }
  .facts-grid > div:nth-child(3) { border-left: 1px solid var(--line); }
  .facts-grid > div:nth-child(n+3) { border-bottom: 0; }
  .section { padding: 78px 0; }
  .split-heading, .balance-grid, .faq-grid, .guide-shell { grid-template-columns: 1fr; }
  .split-heading { gap: 22px; margin-bottom: 38px; }
  .feature-card { padding: 24px; }
  .balance-grid { gap: 45px; }
  .balance-demo { min-height: 390px; }
  .demo-panel { padding: 22px; }
  .screen-track { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; padding: 0 0 18px; margin-inline: 0; }
  .screen-card { flex: 0 0 72vw; scroll-snap-align: start; }
  .guide-intro { padding: 42px 30px; }
  .steps-list { padding: 12px 28px; }
  .faq-intro { position: static; }
  .final-meta { gap: 12px; flex-wrap: wrap; }
  .footer-inner { grid-template-columns: 1fr; gap: 30px; align-items: start; }
  .copyright { text-align: left; }
}

@media (max-width: 480px) {
  .button { width: 100%; }
  .release-line { display: grid; grid-template-columns: repeat(3, 1fr); }
  .release-line span { border-right: 1px solid #d7e7ee; }
  .release-line span:last-child { border: 0; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line) !important; }
  .feature-card:last-child { border-bottom: 0 !important; }
  .feature-top { margin-bottom: 28px; }
  .balance-demo { min-height: 350px; }
  .demo-panel { padding: 16px; }
  .demo-panel strong { font-size: 16px; }
  .demo-panel > span { font-size: 9px; }
  .demo-landscape { inset: 120px 10px 14px; }
  .screen-card { flex-basis: 100%; }
  .steps-list li { grid-template-columns: 44px 1fr; gap: 14px; }
  .final-cta { padding: 76px 0; }
}

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