:root {
  --ink: #10211d;
  --muted: #5b6c66;
  --deep: #071b17;
  --deep-2: #0a2b23;
  --green: #35d5a5;
  --green-dark: #0b6b54;
  --lime: #c8ed68;
  --cream: #f4f1e8;
  --paper: #fbfcf9;
  --line: #dce7e1;
  --orange: #e89b55;
  --white: #fff;
  --shadow: 0 28px 70px rgba(8, 33, 27, .16);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, "Microsoft YaHei", "PingFang SC", "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

.skip-link {
  position: fixed;
  left: 14px;
  top: -60px;
  z-index: 999;
  padding: 10px 16px;
  background: #fff;
  color: #111;
  border-radius: 8px;
  text-decoration: none;
}
.skip-link:focus { top: 14px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7, 27, 23, .96);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.header-shell,
.section-shell,
.footer-shell,
.hero-shell {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}
.header-shell {
  min-height: 72px;
  display: grid;
  grid-template-columns: 190px 1fr auto;
  align-items: center;
  gap: 28px;
}
.brand {
  display: inline-flex;
  text-decoration: none;
  min-width: 0;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  padding: 7px 10px;
  border: 1px solid rgba(255,255,255,.11);
  border-radius: 10px;
  background: rgba(255,255,255,.06);
}
.brand img {
  width: auto;
  height: 34px;
  max-width: 168px;
  object-fit: contain;
  flex-shrink: 0;
}
.desktop-nav {
  display: flex;
  justify-content: center;
  gap: 28px;
}
.desktop-nav a {
  color: #cce0da;
  text-decoration: none;
  font-size: 14px;
}
.desktop-nav a:hover { color: #fff; }
.header-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 8px 18px;
  border-radius: 9px;
  background: var(--green);
  color: #06251b;
  text-decoration: none;
  font-weight: 800;
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 720px;
  color: white;
  background:
    radial-gradient(circle at 86% 22%, rgba(53,213,165,.23), transparent 32%),
    radial-gradient(circle at 3% 80%, rgba(200,237,104,.10), transparent 28%),
    linear-gradient(130deg, #061713 0%, #0a2a22 58%, #0b352a 100%);
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 120px;
  background: linear-gradient(to top, rgba(0,0,0,.18), transparent);
  pointer-events: none;
}
.hero-orbit {
  position: absolute;
  border: 1px solid rgba(83, 221, 176, .16);
  border-radius: 50%;
  pointer-events: none;
}
.hero-orbit-a { width: 560px; height: 560px; right: -150px; top: 50px; }
.hero-orbit-b { width: 860px; height: 860px; right: -310px; top: -115px; }

.hero-shell {
  position: relative;
  z-index: 2;
  min-height: 720px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
  align-items: center;
  gap: 62px;
  padding-block: 74px 84px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 24px;
  padding: 8px 12px;
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 999px;
  color: #c9ddd6;
  font-size: 13px;
  letter-spacing: .05em;
}
.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 6px rgba(53,213,165,.12);
}
.hero h1 {
  margin: 0;
  max-width: 720px;
  font-size: clamp(46px, 5.6vw, 76px);
  line-height: 1.02;
  letter-spacing: -.055em;
}
.hero h1 span {
  display: inline-block;
  margin-top: 8px;
  color: var(--lime);
}
.hero-lead {
  max-width: 680px;
  margin: 28px 0 0;
  color: #d7e4df;
  font-size: 18px;
  line-height: 1.85;
}
.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 34px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 12px 22px;
  border-radius: 11px;
  text-decoration: none;
  font-weight: 800;
  transition: .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--green);
  color: #06251b;
  box-shadow: 0 12px 28px rgba(53,213,165,.18);
}
.btn-ghost {
  border: 1px solid rgba(255,255,255,.23);
  color: #fff;
  background: rgba(255,255,255,.05);
}
.btn-dark { background: var(--deep); color: #fff; }
.hero-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 28px;
  color: #9fb8b0;
  font-size: 13px;
}
.hero-notes span::before {
  content: "•";
  margin-right: 7px;
  color: var(--green);
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.phone-stage {
  position: relative;
  width: min(100%, 480px);
  min-height: 540px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 42% 58% 44% 56% / 43% 42% 58% 57%;
  background:
    radial-gradient(circle at 42% 38%, rgba(255,255,255,.12), transparent 38%),
    rgba(255,255,255,.045);
  box-shadow: inset 0 0 70px rgba(53,213,165,.05);
}
.hero-image {
  max-height: 460px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 35px 44px rgba(0,0,0,.38));
}
.stage-label {
  position: absolute;
  z-index: 2;
  padding: 7px 11px;
  border-radius: 999px;
  background: rgba(7, 27, 23, .82);
  border: 1px solid rgba(255,255,255,.14);
  color: #d9e7e2;
  font-size: 11px;
  letter-spacing: .08em;
}
.stage-label-top { top: 22px; right: 6px; }
.stage-label-bottom { left: -6px; bottom: 38px; }

.device-strip {
  background: #f2f6f3;
  padding: 84px 0 92px;
}
.section-intro { max-width: 760px; }
.section-intro.compact { margin-bottom: 36px; }
.section-kicker {
  margin: 0 0 10px;
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .11em;
  text-transform: uppercase;
}
.section-kicker.light { color: var(--lime); }
.section-intro h2,
.install-copy h2,
.screen-head h2,
.recheck-title h2,
.related-title h2,
.faq-intro h2 {
  margin: 0;
  font-size: clamp(30px, 3.2vw, 44px);
  line-height: 1.16;
  letter-spacing: -.035em;
}
.section-intro p:not(.section-kicker),
.section-summary {
  margin: 16px 0 0;
  color: var(--muted);
}

.device-switch {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 18px;
}
.device-panel {
  min-height: 345px;
  position: relative;
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 18px;
  padding: 34px;
  overflow: hidden;
  border-radius: 26px;
}
.android-panel {
  background: var(--deep);
  color: white;
}
.ios-panel {
  background: #e8e4da;
  color: var(--ink);
}
.device-index {
  font-size: 42px;
  font-weight: 900;
  line-height: 1;
  opacity: .28;
}
.device-tag {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: .14em;
  opacity: .68;
}
.device-main h3 {
  margin: 0 0 12px;
  font-size: 26px;
  line-height: 1.25;
}
.device-main p { margin: 0; opacity: .82; }
.device-main ul {
  margin: 18px 0 62px;
  padding-left: 20px;
}
.device-main li + li { margin-top: 4px; }
.device-cta {
  position: absolute;
  left: 126px;
  bottom: 28px;
  text-decoration: none;
  font-weight: 900;
}
.android-panel .device-cta { color: var(--lime); }
.ios-panel .device-cta { color: #8a4a23; }

.install-section {
  padding: 100px 0;
  background: #fff;
}
.install-grid {
  display: grid;
  grid-template-columns: 1fr minmax(340px, .75fr);
  gap: 78px;
  align-items: center;
}
.steps {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.steps li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.step-num {
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 900;
}
.steps h3 {
  margin: 0;
  font-size: 19px;
}
.steps p {
  margin: 6px 0 0;
  color: var(--muted);
}
.text-download {
  display: inline-block;
  margin-top: 28px;
  color: var(--green-dark);
  font-weight: 900;
  text-decoration: none;
}
.image-frame {
  position: relative;
  border-radius: 38px;
  overflow: hidden;
}
.image-frame-light {
  padding: 26px;
  background: linear-gradient(145deg, #edf2ee, #f8f5ed);
  box-shadow: var(--shadow);
}
.install-visual img {
  max-height: 510px;
  margin-inline: auto;
  object-fit: contain;
}
.install-visual figcaption {
  margin-top: 14px;
  color: #68756f;
  font-size: 13px;
  text-align: center;
}

.screen-section {
  padding: 100px 0;
  background: var(--deep);
  color: #fff;
}
.screen-head {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 70px;
  align-items: end;
  margin-bottom: 48px;
}
.screen-head h2 { max-width: 650px; }
.screen-head > p {
  margin: 0;
  color: #b7cac3;
}
.screen-showcase {
  display: grid;
  grid-template-columns: minmax(300px, .78fr) 1.22fr;
  gap: 62px;
  align-items: center;
}
.screen-image-wrap {
  min-height: 570px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 36px;
  border-radius: 32px;
  background:
    radial-gradient(circle at 50% 40%, rgba(53,213,165,.15), transparent 43%),
    #0a2a22;
  border: 1px solid rgba(255,255,255,.09);
}
.screen-image-wrap img {
  max-height: 520px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 26px 30px rgba(0,0,0,.34));
}
.screen-points {
  border-top: 1px solid rgba(255,255,255,.12);
}
.screen-points article {
  display: grid;
  grid-template-columns: 58px 210px 1fr;
  gap: 18px;
  padding: 25px 0;
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.screen-points article > span {
  color: var(--green);
  font-weight: 900;
}
.screen-points h3 {
  margin: 0;
  font-size: 19px;
}
.screen-points p {
  margin: 0;
  color: #b8cac4;
}

.recheck {
  padding: 88px 0;
  background: #e8efe9;
}
.recheck-shell {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 64px;
}
.recheck-title {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}
.check-icon {
  display: inline-flex;
  flex: 0 0 52px;
  width: 52px;
  height: 52px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--deep);
  color: var(--lime);
  font-weight: 900;
}
.check-lines > div {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 18px;
  padding: 17px 0;
  border-bottom: 1px solid #cbd8d1;
}
.check-lines > div:first-child { border-top: 1px solid #cbd8d1; }
.check-lines span { color: var(--muted); }

.related {
  padding: 90px 0;
  background: #fff;
}
.related-title {
  display: flex;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 30px;
}
.related-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
}
.related-links a {
  min-height: 130px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px;
  text-decoration: none;
  border-right: 1px solid var(--line);
}
.related-links a:last-child { border-right: 0; }
.related-links span {
  color: var(--muted);
  font-size: 13px;
}
.related-links strong { font-size: 18px; }
.related-links a:hover { background: #f4f8f5; }

.faq-section {
  padding: 96px 0;
  background: var(--cream);
}
.faq-shell {
  display: grid;
  grid-template-columns: .72fr 1.28fr;
  gap: 70px;
  align-items: start;
}
.faq-intro {
  position: sticky;
  top: 105px;
}
.faq-intro p:not(.section-kicker) { color: var(--muted); }
.faq-list {
  border-top: 1px solid #d7d1c5;
}
.faq-list details { border-bottom: 1px solid #d7d1c5; }
.faq-list summary {
  cursor: pointer;
  list-style: none;
  padding: 22px 6px;
  font-size: 18px;
  font-weight: 800;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+";
  float: right;
  color: var(--green-dark);
}
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p {
  margin: -4px 0 24px;
  padding-right: 50px;
  color: var(--muted);
}

.final-cta {
  padding: 72px 0;
  background: var(--green);
}
.final-shell {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: center;
}
.final-label {
  display: block;
  margin-bottom: 8px;
  color: #0b5c49;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: .14em;
}
.final-cta h2 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(30px, 3vw, 43px);
  line-height: 1.14;
}
.final-cta p { margin: 12px 0 0; color: #245b4c; }
.final-button {
  min-width: 210px;
  min-height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 24px;
  border-radius: 12px;
  background: var(--deep);
  color: white;
  text-decoration: none;
  font-weight: 900;
}

.site-footer {
  padding: 56px 0 96px;
  background: #061612;
  color: #d9e5e0;
}
.footer-shell {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 38px;
  align-items: start;
}
.footer-brand { max-width: 420px; }
.footer-logo-shell {
  display: inline-flex;
  padding: 7px 10px;
  border: 1px solid rgba(255,255,255,.11);
  border-radius: 9px;
}
.footer-logo-shell img {
  height: 32px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
}
.footer-brand p,
.footer-note {
  color: #9cb2aa;
  font-size: 13px;
}
.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-links a {
  color: #d8e5e0;
  text-decoration: none;
  font-size: 14px;
}
.footer-note {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: 22px;
  border-top: 1px solid rgba(255,255,255,.09);
}

.mobile-download-bar { display: none; }

@media (max-width: 1024px) {
  .desktop-nav { gap: 16px; }
  .hero-shell {
    grid-template-columns: 1fr .78fr;
    gap: 30px;
  }
  .phone-stage { min-height: 470px; }
  .install-grid { gap: 44px; }
  .screen-points article { grid-template-columns: 46px 180px 1fr; }
  .related-links { grid-template-columns: repeat(2, 1fr); }
  .related-links a:nth-child(2) { border-right: 0; }
  .related-links a:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}

@media (max-width: 820px) {
  .header-shell {
    grid-template-columns: 1fr auto;
    min-height: 66px;
  }
  .desktop-nav { display: none; }
  .brand img { height: 31px; }
  .hero { min-height: auto; }
  .hero-shell {
    min-height: auto;
    grid-template-columns: 1fr;
    padding-block: 68px;
  }
  .hero-copy { max-width: 720px; }
  .hero-visual { margin-top: 10px; }
  .phone-stage {
    width: min(100%, 520px);
    min-height: 450px;
  }
  .hero-image { max-height: 390px; }
  .device-switch,
  .install-grid,
  .screen-head,
  .screen-showcase,
  .recheck-shell,
  .faq-shell {
    grid-template-columns: 1fr;
  }
  .device-panel { min-height: auto; }
  .install-visual { order: -1; max-width: 620px; margin-inline: auto; }
  .screen-head { gap: 18px; }
  .screen-showcase { gap: 30px; }
  .screen-image-wrap { min-height: 440px; }
  .screen-image-wrap img { max-height: 390px; }
  .faq-intro { position: static; }
  .final-shell { grid-template-columns: 1fr; }
  .final-button { width: 100%; }
  .footer-shell { grid-template-columns: 1fr; }
  .footer-note { grid-column: auto; }
}

@media (max-width: 600px) {
  body { font-size: 15px; padding-bottom: 64px; }
  .header-shell,
  .section-shell,
  .footer-shell,
  .hero-shell,
  .final-shell {
    width: min(100% - 28px, 1180px);
  }
  .header-download { padding-inline: 13px; }
  .brand-mark { padding: 6px 8px; }
  .brand img { height: 28px; max-width: 142px; }

  .hero-shell { padding-block: 50px 58px; }
  .hero h1 {
    font-size: clamp(38px, 12vw, 54px);
    letter-spacing: -.04em;
  }
  .hero-lead { font-size: 16px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .hero-notes { gap: 7px 12px; }
  .phone-stage {
    min-height: 350px;
    padding: 20px;
    border-radius: 36px;
  }
  .hero-image { max-height: 305px; }
  .stage-label { display: none; }

  .device-strip,
  .install-section,
  .screen-section,
  .related,
  .faq-section {
    padding-block: 64px;
  }
  .recheck { padding-block: 60px; }

  .device-switch { gap: 14px; }
  .device-panel {
    display: block;
    padding: 25px 22px 78px;
    border-radius: 20px;
  }
  .device-index { margin-bottom: 14px; }
  .device-main ul { margin-bottom: 10px; }
  .device-cta { left: 22px; bottom: 26px; }

  .steps li { grid-template-columns: 42px 1fr; }
  .install-visual img { max-height: 310px; }

  .screen-image-wrap {
    min-height: auto;
    padding: 22px;
  }
  .screen-image-wrap img { max-height: 330px; }
  .screen-points article {
    grid-template-columns: 38px 1fr;
    gap: 10px 12px;
  }
  .screen-points article > p {
    grid-column: 2;
  }

  .recheck-title { display: block; }
  .check-icon { margin-bottom: 18px; }
  .check-lines > div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .related-links { grid-template-columns: 1fr; }
  .related-links a {
    min-height: 105px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .related-links a:last-child { border-bottom: 0; }

  .faq-list details p { padding-right: 8px; }
  .footer-links { display: grid; grid-template-columns: 1fr 1fr; }

  .mobile-download-bar {
    position: fixed;
    z-index: 80;
    left: 0;
    right: 0;
    bottom: 0;
    height: 60px;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 12px;
    align-items: center;
    padding: 8px 14px;
    background: rgba(6, 22, 18, .97);
    border-top: 1px solid rgba(255,255,255,.1);
    color: #d8e5e0;
    font-size: 12px;
    backdrop-filter: blur(14px);
  }
  .mobile-download-bar a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 8px 17px;
    border-radius: 9px;
    background: var(--green);
    color: #06251b;
    text-decoration: none;
    font-weight: 900;
  }
}