:root {
  --navy: #243153;
  --navy-dark: #121a31;
  --sky: #cde9f4;
  --sky-soft: #ecf7fb;
  --lilac: #dcd5f5;
  --coral: #f07868;
  --coral-dark: #c94e40;
  --paper: #fffdfa;
  --ink: #282d3f;
  --muted: #6d7282;
  --line: #d9dce7;
  --white: #ffffff;
  --rail: 116px;
  --shell: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  font: inherit;
}

.skip-link {
  position: fixed;
  top: -90px;
  left: 18px;
  z-index: 1000;
  padding: 10px 15px;
  color: var(--white);
  background: var(--coral);
  font-weight: 850;
}

.skip-link:focus {
  top: 18px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 120;
  min-height: 78px;
  display: grid;
  grid-template-columns: 265px 1fr 165px;
  gap: 30px;
  align-items: center;
  padding: 0 28px;
  color: var(--white);
  background: rgba(18, 26, 49, 0.98);
  border-bottom: 1px solid rgba(255, 255, 255, 0.11);
  backdrop-filter: blur(16px);
}

.brand-capsule,
.footer-capsule {
  width: max-content;
  display: flex;
  align-items: center;
  padding: 5px 17px 5px 6px;
  background: var(--navy);
  border: 1px solid #4b5981;
  border-radius: 999px;
}

.capsule-icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  padding: 4px;
  background: var(--sky);
  border-radius: 50%;
}

.capsule-icon img {
  width: 38px;
  height: 38px;
  object-fit: contain;
  border-radius: 50%;
}

.capsule-logo {
  min-width: 170px;
  display: flex;
  align-items: center;
  padding-left: 12px;
}

.capsule-logo img {
  width: auto;
  height: 30px;
  object-fit: contain;
}

.topbar-meta {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 18px;
}

.topbar-meta span {
  color: #8d9bc2;
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.14em;
}

.topbar-meta strong {
  color: var(--coral);
  font-size: 28px;
  line-height: 1;
}

.topbar-download {
  justify-self: end;
  padding: 11px 15px;
  color: var(--navy-dark);
  background: var(--sky);
  font-size: 12px;
  font-weight: 900;
}

.topbar-download:hover,
.topbar-download:focus-visible {
  background: var(--white);
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid #4b5981;
}

.menu-button span {
  display: block;
  width: 19px;
  height: 2px;
  margin: 4px auto;
  background: var(--white);
}

.side-rail {
  position: fixed;
  left: 0;
  top: 78px;
  bottom: 0;
  z-index: 90;
  width: var(--rail);
  display: grid;
  grid-template-rows: 1fr auto;
  color: var(--white);
  background: var(--navy-dark);
  border-right: 1px solid #344164;
}

.side-rail nav {
  overflow-y: auto;
}

.side-rail nav a {
  min-height: 82px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 3px;
  padding: 10px;
  color: #8996ba;
  border-bottom: 1px solid #2d3859;
  text-align: center;
}

.side-rail nav a:hover,
.side-rail nav a:focus-visible {
  color: var(--navy-dark);
  background: var(--sky);
}

.side-rail b {
  color: var(--coral);
  font-size: 11px;
}

.side-rail nav a:hover b,
.side-rail nav a:focus-visible b {
  color: var(--coral-dark);
}

.side-rail span {
  font-size: 10px;
  font-weight: 800;
}

.rail-download {
  display: grid;
  place-items: center;
  min-height: 70px;
  color: var(--navy-dark);
  background: var(--coral);
  font-size: 12px;
  font-weight: 900;
}

.page-content,
.site-footer {
  margin-left: var(--rail);
}

.hero,
.section,
.intro-banner,
.final-section,
.footer-shell {
  width: min(calc(100% - 56px), var(--shell));
  margin-inline: auto;
}

.hero {
  min-height: 690px;
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 60px;
  align-items: center;
  padding-top: 78px;
  padding-bottom: 78px;
  background:
    radial-gradient(circle at 83% 20%, rgba(220, 213, 245, 0.75), transparent 25%),
    linear-gradient(rgba(36, 49, 83, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 49, 83, 0.045) 1px, transparent 1px),
    var(--sky-soft);
  background-size: auto, 62px 62px, 62px 62px;
}

.eyebrow,
.section-label {
  margin: 0 0 15px;
  color: var(--coral-dark);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  color: var(--navy-dark);
  font-size: clamp(56px, 7vw, 94px);
  line-height: 0.96;
  letter-spacing: -0.06em;
}

.hero-lead {
  max-width: 670px;
  margin: 28px 0 0;
  color: #5f6679;
  font-size: 18px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 22px;
  margin-top: 34px;
}

.primary-button {
  min-width: 260px;
  min-height: 58px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 14px 20px;
  color: var(--white);
  background: var(--coral);
  font-weight: 900;
  box-shadow: 0 18px 42px rgba(240, 120, 104, 0.22);
}

.primary-button:hover,
.primary-button:focus-visible {
  background: var(--coral-dark);
}

.primary-button b {
  font-size: 20px;
}

.text-button {
  padding-bottom: 4px;
  color: var(--navy);
  border-bottom: 1px solid currentColor;
  font-size: 13px;
  font-weight: 850;
}

.hero-answer {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 20px;
  margin-top: 37px;
  padding-top: 22px;
  border-top: 1px solid #cedae2;
}

.hero-answer span {
  color: var(--coral-dark);
  font-size: 11px;
  font-weight: 900;
}

.hero-answer p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.hero-device-stage {
  padding: 20px;
  background: var(--navy);
  border-radius: 30px 6px 30px 6px;
  box-shadow: 0 32px 82px rgba(36, 49, 83, 0.2);
}

.stage-note {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 14px;
  color: var(--white);
  border-bottom: 1px solid #4b5981;
}

.stage-note span {
  color: var(--sky);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.stage-note b {
  font-size: 11px;
}

.device-card {
  margin-top: 17px;
  padding: 17px;
  background: linear-gradient(145deg, var(--sky), var(--lilac));
  border-radius: 18px 4px 18px 4px;
}

.device-card img {
  width: 100%;
  max-height: 400px;
  object-fit: contain;
}

.stage-tags {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 16px;
  border-top: 1px solid #4b5981;
  border-left: 1px solid #4b5981;
}

.stage-tags span {
  padding: 9px;
  color: #9ba7ca;
  border-right: 1px solid #4b5981;
  border-bottom: 1px solid #4b5981;
  font-size: 9px;
  font-weight: 800;
  text-align: center;
}

.intro-banner {
  min-height: 175px;
  display: grid;
  grid-template-columns: 90px 1fr 235px;
  gap: 32px;
  align-items: center;
  padding: 30px 35px;
  color: var(--white);
  background: var(--navy);
}

.intro-number {
  color: var(--coral);
  font-size: 52px;
  font-weight: 950;
}

.intro-banner h2,
.section-heading h2,
.requirements-head h2,
.install-heading h2,
.security-heading h2,
.content-copy h2,
.repair-heading h2,
.faq-heading h2,
.related-heading h2,
.final-copy h2 {
  margin: 0;
  color: var(--navy-dark);
  font-size: clamp(33px, 4.3vw, 53px);
  line-height: 1.16;
  letter-spacing: -0.04em;
}

.intro-banner h2 {
  color: var(--white);
  font-size: clamp(29px, 3.6vw, 44px);
}

.intro-banner p:not(.section-label) {
  margin: 12px 0 0;
  color: #a7b2d2;
}

.intro-banner > a {
  min-height: 66px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 15px 18px;
  color: var(--navy-dark);
  background: var(--sky);
  font-weight: 900;
}

.section {
  padding-top: 104px;
  padding-bottom: 104px;
}

.section-heading {
  max-width: 850px;
}

.section-heading > p:not(.section-label),
.requirements-head > p:not(.section-label),
.install-heading > p:not(.section-label),
.security-heading > p:not(.section-label),
.content-copy > p:not(.section-label),
.repair-heading > p:not(.section-label),
.faq-heading > p:not(.section-label) {
  margin: 20px 0 0;
  color: var(--muted);
}

.device-choice {
  background: var(--paper);
}

.device-selector {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 22px;
  margin-top: 42px;
}

.device-tabs {
  display: grid;
  align-content: start;
  gap: 10px;
}

.device-tab {
  min-height: 62px;
  color: var(--navy);
  background: var(--sky-soft);
  border: 1px solid var(--line);
  cursor: pointer;
  font-weight: 900;
}

.device-tab.is-active {
  color: var(--white);
  background: var(--coral);
  border-color: var(--coral);
}

.device-panel {
  min-height: 360px;
  display: grid;
  grid-template-columns: 150px 1fr 155px;
  gap: 28px;
  align-items: center;
  padding: 34px;
  background: linear-gradient(135deg, var(--sky-soft), #f8f3ff);
  border: 1px solid var(--line);
}

.device-panel-icon {
  padding: 17px;
  background: var(--white);
  border-radius: 28px 8px 28px 8px;
  box-shadow: 0 18px 44px rgba(36, 49, 83, 0.1);
}

.device-panel-icon img {
  width: 115px;
  height: 115px;
  object-fit: contain;
}

.device-panel-copy > span {
  color: var(--coral-dark);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.device-panel-copy h3 {
  margin: 7px 0 10px;
  color: var(--navy-dark);
  font-size: 29px;
}

.device-panel-copy > p {
  margin: 0;
  color: var(--muted);
}

.device-panel dl {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 23px 0 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.device-panel dl div {
  padding: 11px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.device-panel dt {
  color: #888fa0;
  font-size: 9px;
  font-weight: 800;
}

.device-panel dd {
  margin: 4px 0 0;
  color: var(--navy-dark);
  font-size: 10px;
  font-weight: 900;
}

.device-panel > a {
  padding: 12px 15px;
  color: var(--white);
  background: var(--navy);
  text-align: center;
  font-size: 11px;
  font-weight: 900;
}

.requirements {
  background: var(--sky-soft);
}

.requirements-head {
  max-width: 850px;
}

.requirements-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr 1fr;
  margin-top: 42px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.requirements-grid article {
  min-height: 240px;
  padding: 26px;
  background: rgba(255, 255, 255, 0.5);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.requirement-feature {
  grid-row: span 2;
  min-height: 480px !important;
  color: var(--white);
  background: var(--navy) !important;
}

.requirements-grid span,
.requirements-grid b {
  color: var(--coral-dark);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.11em;
}

.requirement-feature span {
  color: var(--sky);
}

.requirements-grid h3 {
  margin: 45px 0 10px;
  color: var(--navy-dark);
  font-size: 19px;
}

.requirement-feature h3 {
  margin-top: 75px;
  color: var(--white);
  font-size: 34px;
}

.requirements-grid p {
  margin: 0;
  color: var(--muted);
}

.requirement-feature p {
  color: #a8b3d1;
}

.requirement-feature strong {
  display: block;
  margin-top: 45px;
  color: var(--coral);
  font-size: 19px;
}

.install {
  color: var(--white);
  background: var(--navy-dark);
}

.install-heading {
  max-width: 850px;
}

.install-heading h2 {
  color: var(--white);
}

.install-heading > p:not(.section-label) {
  color: #9da9c8;
}

.install-sequence {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin: 42px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid #354262;
  border-left: 1px solid #354262;
}

.install-sequence li {
  min-height: 215px;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 22px;
  padding: 25px;
  border-right: 1px solid #354262;
  border-bottom: 1px solid #354262;
}

.install-sequence li:nth-child(2),
.install-sequence li:nth-child(3) {
  background: rgba(205, 233, 244, 0.035);
}

.sequence-index {
  color: var(--coral);
  font-size: 38px;
  font-weight: 950;
}

.install-sequence span {
  color: var(--sky);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.11em;
}

.install-sequence h3 {
  margin: 6px 0 9px;
  font-size: 19px;
}

.install-sequence p {
  margin: 0;
  color: #98a5c4;
  font-size: 13px;
}

.install-cta {
  display: grid;
  grid-template-columns: 62px 1fr 160px;
  gap: 18px;
  align-items: center;
  margin-top: 22px;
  padding: 20px 24px;
  color: var(--navy-dark);
  background: var(--sky);
}

.install-cta img {
  width: 52px;
  height: 52px;
  object-fit: contain;
}

.install-cta strong,
.install-cta span {
  display: block;
}

.install-cta span {
  color: #5d6a7d;
  font-size: 11px;
}

.install-cta a {
  padding: 11px 15px;
  color: var(--white);
  background: var(--coral);
  text-align: center;
  font-size: 11px;
  font-weight: 900;
}

.security {
  background: var(--paper);
}

.security-heading {
  max-width: 850px;
}

.security-ledger {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 42px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.security-ledger article {
  min-height: 275px;
  padding: 25px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.security-ledger article:nth-child(2),
.security-ledger article:nth-child(4) {
  background: var(--sky-soft);
}

.security-ledger span {
  color: var(--coral-dark);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.11em;
}

.security-ledger h3 {
  margin: 48px 0 10px;
  color: var(--navy-dark);
  font-size: 18px;
}

.security-ledger p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.content-preview {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 65px;
  align-items: center;
  background: linear-gradient(135deg, var(--lilac), var(--sky));
}

.preview-card {
  min-height: 230px;
  display: grid;
  grid-template-columns: 95px 1fr;
  gap: 22px;
  align-items: center;
  padding: 28px;
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(36, 49, 83, 0.15);
}

.preview-card img {
  width: 82px;
  height: 82px;
  object-fit: contain;
}

.preview-card span {
  color: var(--coral-dark);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.preview-card h3 {
  margin: 7px 0 8px;
  color: var(--navy-dark);
  font-size: 19px;
}

.preview-card p {
  margin: 0;
  color: var(--muted);
}

.repair {
  background: var(--sky-soft);
}

.repair-heading {
  max-width: 850px;
}

.repair-list {
  margin-top: 42px;
  border-top: 2px solid var(--navy);
}

.repair-list article {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 22px;
  min-height: 130px;
  padding: 23px 0;
  border-bottom: 1px solid var(--line);
}

.repair-list > article > b {
  color: var(--coral);
  font-size: 28px;
  line-height: 1.2;
}

.repair-list span {
  color: var(--coral-dark);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.repair-list h3 {
  margin: 5px 0 7px;
  color: var(--navy-dark);
  font-size: 18px;
}

.repair-list p {
  margin: 0;
  color: var(--muted);
}

.faq {
  background: var(--paper);
}

.faq-heading {
  max-width: 850px;
}

.faq-list {
  margin-top: 42px;
  border-top: 2px solid var(--navy);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  position: relative;
  padding: 24px 55px 24px 0;
  color: var(--navy-dark);
  font-size: 16px;
  font-weight: 850;
  cursor: pointer;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary span {
  position: absolute;
  right: 4px;
  top: 20px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  color: var(--coral-dark);
  border: 1px solid var(--line);
  border-radius: 50%;
  transition: transform 0.2s ease;
}

.faq-list details[open] summary span {
  transform: rotate(45deg);
}

.faq-list p {
  margin: -2px 0 23px;
  color: var(--muted);
}

.related {
  background: var(--sky-soft);
}

.related-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin-top: 42px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.related-links a {
  min-height: 128px;
  display: grid;
  align-content: center;
  padding: 22px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.related-links a:hover,
.related-links a:focus-visible {
  background: var(--white);
}

.related-links strong {
  color: var(--coral-dark);
  font-size: 15px;
}

.related-links span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 11px;
}

.final-section {
  min-height: 285px;
  display: grid;
  grid-template-columns: 105px 1fr 240px;
  gap: 40px;
  align-items: center;
  margin-bottom: 90px;
  padding: 44px 50px;
  color: var(--white);
  background: var(--coral);
}

.final-icon {
  padding: 10px;
  background: var(--white);
  border-radius: 28px 8px 28px 8px;
}

.final-icon img {
  width: 80px;
  height: 80px;
  object-fit: contain;
}

.final-copy p {
  margin: 0 0 9px;
  color: #ffe3de;
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.13em;
}

.final-copy h2 {
  color: var(--white);
  font-size: clamp(28px, 3.5vw, 43px);
}

.final-copy span {
  display: block;
  margin-top: 13px;
  color: #fff0ed;
  font-size: 11px;
}

.final-button {
  min-height: 70px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding: 16px 20px;
  color: var(--navy-dark);
  background: var(--sky);
  font-weight: 900;
}

.final-button b {
  font-size: 20px;
}

.site-footer {
  padding: 52px 0 32px;
  color: #9ba7c8;
  background: var(--navy-dark);
}

.footer-shell {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px 55px;
}

.footer-capsule {
  padding-right: 16px;
}

.footer-app-icon {
  width: 43px;
  height: 43px;
  padding: 4px;
  background: var(--sky);
  border-radius: 50%;
}

.footer-capsule > span {
  min-width: 170px;
  padding-left: 11px;
}

.footer-capsule > span img {
  width: auto;
  height: 29px;
  object-fit: contain;
}

.footer-brand p {
  max-width: 710px;
  margin: 17px 0 0;
  color: #66718f;
  font-size: 11px;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, auto);
  gap: 8px 25px;
  font-size: 12px;
  font-weight: 700;
}

.footer-nav a:hover,
.footer-nav a:focus-visible {
  color: var(--white);
}

.copyright {
  grid-column: 1 / -1;
  margin: 5px 0 0;
  padding-top: 21px;
  color: #495574;
  border-top: 1px solid #303b5d;
  font-size: 11px;
}

.mobile-download {
  display: none;
}

@media (max-width: 1000px) {
  :root {
    --rail: 96px;
  }

  .topbar {
    grid-template-columns: 250px 1fr 150px;
  }

  .hero {
    gap: 35px;
  }

  .security-ledger {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 820px) {
  :root {
    --rail: 0px;
  }

  html {
    scroll-padding-top: 72px;
  }

  .topbar {
    min-height: 70px;
    grid-template-columns: 1fr auto;
    padding: 0 18px;
  }

  .topbar-meta,
  .topbar-download {
    display: none;
  }

  .menu-button {
    display: block;
  }

  .side-rail {
    position: absolute;
    left: 18px;
    right: 18px;
    top: 78px;
    bottom: auto;
    width: auto;
    display: none;
    grid-template-rows: 1fr;
    border: 1px solid #3d4a70;
    box-shadow: 0 22px 55px rgba(18, 26, 49, 0.3);
  }

  .side-rail.is-open {
    display: block;
  }

  .side-rail nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .side-rail nav a {
    min-height: 60px;
  }

  .rail-download {
    display: none;
  }

  .hero,
  .section,
  .intro-banner,
  .final-section,
  .footer-shell {
    width: min(calc(100% - 36px), var(--shell));
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    text-align: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-answer {
    max-width: 700px;
    margin-inline: auto;
    text-align: left;
  }

  .hero-device-stage {
    width: min(100%, 620px);
    margin-inline: auto;
  }

  .intro-banner {
    grid-template-columns: 75px 1fr;
  }

  .intro-banner > a {
    grid-column: 2;
    width: 235px;
  }

  .device-selector {
    grid-template-columns: 1fr;
  }

  .device-tabs {
    grid-template-columns: 1fr 1fr;
  }

  .device-panel {
    grid-template-columns: 120px 1fr;
  }

  .device-panel > a {
    grid-column: 2;
    width: 155px;
  }

  .requirements-grid {
    grid-template-columns: 1fr 1fr;
  }

  .requirement-feature {
    grid-column: 1 / -1;
    grid-row: auto;
    min-height: 330px !important;
  }

  .content-preview {
    grid-template-columns: 1fr;
  }

  .final-section {
    grid-template-columns: 100px 1fr;
  }

  .final-button {
    grid-column: 2;
    width: 240px;
  }

  .footer-shell {
    grid-template-columns: 1fr;
  }

  .copyright {
    grid-column: auto;
  }
}

@media (max-width: 600px) {
  body {
    padding-bottom: 70px;
  }

  .brand-capsule {
    padding-right: 13px;
  }

  .capsule-icon {
    width: 42px;
    height: 42px;
  }

  .capsule-icon img {
    width: 34px;
    height: 34px;
  }

  .capsule-logo {
    min-width: 150px;
  }

  .capsule-logo img {
    height: 27px;
  }

  .hero,
  .section,
  .intro-banner,
  .final-section,
  .footer-shell {
    width: min(calc(100% - 28px), var(--shell));
  }

  .hero {
    padding-top: 55px;
    padding-bottom: 55px;
  }

  .hero h1 {
    font-size: clamp(46px, 15vw, 68px);
  }

  .hero-lead {
    font-size: 16px;
  }

  .hero-actions {
    display: grid;
  }

  .primary-button {
    min-width: 0;
    width: 100%;
  }

  .text-button {
    justify-self: center;
  }

  .hero-answer {
    grid-template-columns: 1fr;
    gap: 7px;
    text-align: center;
  }

  .stage-tags {
    grid-template-columns: repeat(2, 1fr);
  }

  .intro-banner {
    grid-template-columns: 1fr;
    padding: 28px 23px;
  }

  .intro-banner > a {
    grid-column: auto;
    width: 100%;
  }

  .section {
    padding-top: 70px;
    padding-bottom: 70px;
  }

  .section-heading h2,
  .requirements-head h2,
  .install-heading h2,
  .security-heading h2,
  .content-copy h2,
  .repair-heading h2,
  .faq-heading h2,
  .related-heading h2 {
    font-size: clamp(30px, 10vw, 41px);
  }

  .device-panel {
    grid-template-columns: 1fr;
    padding: 24px;
  }

  .device-panel-icon {
    width: 105px;
  }

  .device-panel-icon img {
    width: 70px;
    height: 70px;
  }

  .device-panel dl {
    grid-template-columns: 1fr;
  }

  .device-panel > a {
    grid-column: auto;
    width: 100%;
  }

  .requirements-grid,
  .install-sequence,
  .security-ledger,
  .related-links {
    grid-template-columns: 1fr;
  }

  .requirement-feature {
    grid-column: auto;
    min-height: 0 !important;
  }

  .requirement-feature h3 {
    margin-top: 40px;
  }

  .install-sequence li {
    grid-template-columns: 60px 1fr;
    gap: 15px;
  }

  .install-cta {
    grid-template-columns: 52px 1fr;
  }

  .install-cta a {
    grid-column: 2;
    width: 100%;
  }

  .security-ledger article {
    min-height: 0;
  }

  .preview-card {
    grid-template-columns: 72px 1fr;
    gap: 15px;
  }

  .preview-card img {
    width: 64px;
    height: 64px;
  }

  .repair-list article {
    grid-template-columns: 45px 1fr;
    gap: 14px;
  }

  .faq-list summary {
    font-size: 15px;
  }

  .final-section {
    grid-template-columns: 1fr;
    padding: 34px 23px;
  }

  .final-icon {
    width: 82px;
  }

  .final-icon img {
    width: 62px;
    height: 62px;
  }

  .final-button {
    grid-column: auto;
    width: 100%;
  }

  .footer-nav {
    grid-template-columns: 1fr 1fr;
  }

  .mobile-download {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 130;
    min-height: 70px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 9px 14px;
    color: var(--white);
    background: rgba(18, 26, 49, 0.97);
    border-top: 1px solid #354262;
  }

  .mobile-download > div {
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .mobile-download img {
    width: 44px;
    height: 44px;
    object-fit: contain;
    border-radius: 10px;
  }

  .mobile-download small,
  .mobile-download strong {
    display: block;
    line-height: 1.2;
  }

  .mobile-download small {
    color: #7481a2;
    font-size: 10px;
  }

  .mobile-download strong {
    margin-top: 3px;
    font-size: 13px;
  }

  .mobile-download > a {
    padding: 11px 15px;
    color: var(--navy-dark);
    background: var(--sky);
    font-size: 13px;
    font-weight: 900;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}