:root {
  --ink: #172532;
  --navy: #243f55;
  --steel: #60798e;
  --mist: #edf2f5;
  --paper: #f8fafb;
  --line: #cbd6dd;
  --white: #ffffff;
  --signal: #4f748e;
  --deep: #122330;
  --radius: 6px;
  --shadow: 0 18px 45px rgba(27, 51, 70, .12);
  --shell: min(1180px, calc(100% - 48px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
h1, h2, h3, p, dl, dd { margin-top: 0; }
h1, h2, h3 {
  font-family: "Arial Narrow", "Microsoft YaHei UI", sans-serif;
  letter-spacing: -.035em;
  line-height: 1.16;
}
h2 { font-size: clamp(2rem, 4vw, 3.7rem); }
p { color: #526878; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 100;
  padding: 10px 16px;
  color: var(--white);
  background: var(--deep);
}
.skip-link:focus { top: 12px; }
:focus-visible {
  outline: 3px solid #8cb3cc;
  outline-offset: 4px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(203, 214, 221, .8);
  background: rgba(248, 250, 251, .94);
  backdrop-filter: blur(14px);
}
.header-shell {
  width: var(--shell);
  min-height: 76px;
  margin: auto;
  display: flex;
  align-items: center;
  gap: 22px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  font-size: 1.08rem;
  font-weight: 800;
  letter-spacing: -.02em;
}
.brand-mark {
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: flex-end;
  justify-content: center;
  gap: 3px;
  padding: 7px 6px;
  border-radius: 50%;
  background: var(--navy);
}
.brand-mark i { width: 3px; background: #dce7ed; border-radius: 2px; }
.brand-mark i:nth-child(1) { height: 6px; }
.brand-mark i:nth-child(2) { height: 11px; }
.brand-mark i:nth-child(3) { height: 16px; }
.primary-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  gap: clamp(10px, 1.35vw, 21px);
}
.primary-nav a {
  position: relative;
  color: #3f5565;
  font-size: .86rem;
  white-space: nowrap;
}
.primary-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -8px;
  height: 2px;
  background: var(--signal);
  transition: right .2s ease;
}
.primary-nav a:hover::after,
.primary-nav a[aria-current="page"]::after { right: 0; }
.header-action,
.button,
.download-button {
  display: inline-flex;
  min-width: 120px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 3px;
  font-weight: 700;
  line-height: 1.2;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.header-action { color: var(--white); background: var(--navy); font-size: .88rem; }
.button:hover, .header-action:hover, .download-button:hover { transform: translateY(-2px); }
.nav-toggle { display: none; border: 0; background: transparent; }

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(70px, 8vw, 122px) 0 0;
  background:
    linear-gradient(90deg, rgba(36, 63, 85, .045) 1px, transparent 1px) 0 0 / 84px 84px,
    linear-gradient(rgba(36, 63, 85, .045) 1px, transparent 1px) 0 0 / 84px 84px;
}
.hero::before {
  content: "SECURE CHANNEL / 01";
  position: absolute;
  top: 40%;
  left: -90px;
  color: #b6c4cd;
  font: 700 .68rem/1 monospace;
  letter-spacing: .22em;
  transform: rotate(-90deg);
}
.hero-grid {
  width: var(--shell);
  margin: auto;
  display: grid;
  grid-template-columns: minmax(0, .88fr) minmax(440px, 1.12fr);
  gap: clamp(54px, 7vw, 104px);
  align-items: center;
}
.hero-copy { padding-bottom: 48px; }
.signal-label, .eyebrow {
  color: var(--signal);
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.signal-label { display: flex; align-items: center; gap: 10px; }
.signal-label span {
  width: 8px;
  height: 8px;
  border: 2px solid var(--signal);
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(79, 116, 142, .12);
}
.hero h1 {
  max-width: 650px;
  margin: 24px 0;
  font-size: clamp(3.2rem, 6.4vw, 6.3rem);
  font-weight: 760;
  letter-spacing: -.07em;
}
.hero-lead { max-width: 590px; font-size: 1.08rem; }
.hero-actions { display: flex; align-items: center; gap: 28px; margin: 34px 0 42px; }
.button-primary { color: var(--white); background: var(--navy); }
.button-outline { border-color: var(--line); background: transparent; }
.button-light { color: var(--deep); background: var(--white); }
.text-link { color: var(--navy); font-weight: 750; }
.text-link span { margin-left: 5px; transition: margin .2s ease; }
.text-link:hover span { margin-left: 10px; }
.hero-proof { display: flex; gap: 0; margin-bottom: 0; border-top: 1px solid var(--line); }
.hero-proof div { min-width: 132px; padding: 16px 18px 0 0; }
.hero-proof div + div { padding-left: 18px; border-left: 1px solid var(--line); }
.hero-proof dt { color: #718695; font-size: .72rem; }
.hero-proof dd { color: var(--ink); font: 700 1rem/1.4 monospace; }
.hero-media {
  position: relative;
  align-self: center;
  min-width: 0;
  height: auto;
  border: 1px solid var(--line);
  background: var(--white);
  box-shadow: var(--shadow);
}
.media-caption {
  display: flex;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  color: #6a7e8c;
  font: .66rem/1.4 monospace;
  letter-spacing: .08em;
}
.media-caption strong { color: #3f6f60; }
.route-strip {
  width: var(--shell);
  margin: clamp(62px, 8vw, 108px) auto 0;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  color: #657b8a;
  font: 700 .67rem/1.3 monospace;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.route-strip i { height: 1px; flex: 1; background: var(--line); position: relative; }
.route-strip i::after {
  content: "";
  position: absolute;
  right: 0;
  top: -2px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--signal);
}

.metrics {
  width: var(--shell);
  margin: 0 auto;
  padding: clamp(80px, 11vw, 150px) 0;
  display: grid;
  grid-template-columns: .55fr 1.1fr;
  gap: 42px;
}
.section-index {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 14px;
  color: var(--signal);
  font: 700 .67rem/1.5 monospace;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.section-index b { color: #99a9b3; font-weight: 500; }
.metric-heading h2 { margin-bottom: 12px; font-size: clamp(2rem, 3.5vw, 3.3rem); }
.metric-row {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.metric-row article { padding: 32px 22px; }
.metric-row article + article { border-left: 1px solid var(--line); }
.metric-row strong { display: block; color: var(--navy); font: 700 clamp(1.8rem, 3vw, 3rem)/1.2 "Arial Narrow", sans-serif; }
.metric-row span { color: #6b808e; font-size: .82rem; }

.feature-ledger {
  display: grid;
  grid-template-columns: minmax(320px, .8fr) minmax(500px, 1.2fr);
  min-height: 780px;
  background: var(--mist);
}
.ledger-intro {
  padding: clamp(70px, 8vw, 130px) max(40px, calc((100vw - 1180px) / 2));
  padding-right: clamp(38px, 6vw, 100px);
}
.ledger-intro h2 { margin-bottom: 24px; }
.ledger-intro img {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 48px;
  border: 1px solid var(--line);
  object-fit: contain;
}
.ledger-list { border-left: 1px solid var(--line); }
.ledger-list article {
  min-height: 130px;
  display: grid;
  grid-template-columns: 90px 1fr;
  align-items: center;
  gap: 24px;
  padding: 30px clamp(36px, 6vw, 96px);
  border-bottom: 1px solid var(--line);
  transition: background .2s ease;
}
.ledger-list article:hover { background: rgba(255, 255, 255, .55); }
.feature-code { color: #8094a2; font: 700 .75rem/1 monospace; letter-spacing: .16em; }
.ledger-list h3 { margin-bottom: 5px; font-size: 1.35rem; }
.ledger-list p { margin-bottom: 0; font-size: .9rem; }

.download-section { width: var(--shell); margin: auto; padding: clamp(90px, 12vw, 168px) 0; }
.download-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 48px; }
.download-head h2 { margin-bottom: 0; }
.download-matrix {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--line);
}
.download-card {
  position: relative;
  min-height: 210px;
  display: grid;
  grid-template-columns: 62px 1fr;
  grid-template-rows: 1fr auto;
  gap: 22px;
  padding: 32px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--white);
}
.platform-glyph {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  color: var(--navy);
  font: 800 1.2rem/1 monospace;
}
.download-card h3 { margin: 1px 0 5px; font-size: 1.45rem; }
.download-card p { margin-bottom: 8px; color: var(--ink); font-size: .86rem; }
.download-card small { color: #748794; }
.download-button {
  grid-column: 2;
  justify-self: start;
  border-color: var(--line);
  color: var(--navy);
  background: var(--paper);
}

.pricing-section {
  padding: clamp(88px, 11vw, 150px) max(24px, calc((100vw - 1180px) / 2));
  display: grid;
  grid-template-columns: .62fr 1.38fr;
  gap: clamp(50px, 8vw, 120px);
  background: #e8eef2;
}
.pricing-note { align-self: center; }
.pricing-note h2 { font-size: clamp(2.25rem, 4vw, 4.1rem); }
.billing-control {
  display: inline-flex;
  margin-top: 20px;
  padding: 5px;
  border: 1px solid var(--line);
  color: #667a88;
  font-size: .78rem;
}
.billing-control span, .billing-control b { padding: 7px 12px; }
.billing-control b { color: var(--white); background: var(--navy); }
.price-stack { display: grid; gap: 12px; }
.price-stack article {
  display: grid;
  grid-template-columns: 1fr 150px 1.1fr auto;
  align-items: center;
  gap: 25px;
  padding: 28px 30px;
  border: 1px solid #c6d2d9;
  background: rgba(255, 255, 255, .58);
}
.price-stack article.price-featured { color: var(--white); background: var(--navy); border-color: var(--navy); }
.price-stack article.price-featured p,
.price-stack article.price-featured span { color: #ccdae2; }
.price-stack article.price-featured .button-primary { color: var(--navy); background: var(--white); }
.price-top h3 { margin-bottom: 3px; font-size: 1.2rem; }
.price-top span { color: #738694; font-size: .75rem; }
.price { margin: 0; color: var(--navy); font: 800 2.45rem/1 "Arial Narrow", sans-serif; white-space: nowrap; }
.price small { font-size: 1rem; }
.price em { color: #748793; font: normal .72rem/1 sans-serif; }
.price-stack ul { margin: 0; padding-left: 18px; color: #5b7080; font-size: .78rem; }

.newsroom {
  width: var(--shell);
  margin: auto;
  padding: clamp(92px, 12vw, 166px) 0;
  display: grid;
  grid-template-columns: .7fr 1.3fr;
  gap: 54px;
}
.news-title { padding-top: 12px; }
.news-title h2 { font-size: clamp(2.2rem, 4vw, 4rem); }
.news-lead {
  border: 1px solid var(--line);
  background: var(--white);
}
.news-lead img { display: block; width: 100%; height: auto; object-fit: contain; }
.news-lead div { padding: 30px; }
.news-lead time, .news-list time { color: #78909f; font: .72rem/1 monospace; }
.news-lead h3 { margin: 13px 0; font-size: 1.65rem; }
.news-lead a { color: var(--navy); font-weight: 800; }
.news-list { grid-column: 1 / -1; border-top: 1px solid var(--ink); }
.news-list a {
  display: grid;
  grid-template-columns: 90px 1fr 64px;
  gap: 20px;
  align-items: center;
  padding: 22px 8px;
  border-bottom: 1px solid var(--line);
}
.news-list a:hover span { color: var(--signal); }
.news-list b { color: #758995; font-size: .7rem; text-align: right; }

.partner-section {
  width: var(--shell);
  margin: 0 auto clamp(90px, 11vw, 150px);
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  color: var(--white);
  background: var(--deep);
}
.partner-copy { padding: clamp(50px, 7vw, 90px); }
.partner-copy h2 { max-width: 650px; font-size: clamp(2.5rem, 5vw, 5rem); }
.partner-copy p { max-width: 600px; color: #afc0ca; }
.partner-copy .eyebrow { color: #91afc1; }
.partner-data { margin: 0; display: grid; grid-template-rows: repeat(3, 1fr); border-left: 1px solid #395064; }
.partner-data div { display: flex; flex-direction: column; justify-content: center; padding: 26px 48px; }
.partner-data div + div { border-top: 1px solid #395064; }
.partner-data dt { color: #91a7b5; font-size: .75rem; }
.partner-data dd { font: 750 clamp(2rem, 4vw, 3.7rem)/1.2 "Arial Narrow", sans-serif; }

.faq-section {
  width: var(--shell);
  margin: auto;
  padding-bottom: clamp(100px, 13vw, 180px);
  display: grid;
  grid-template-columns: .72fr 1.28fr;
  gap: clamp(50px, 8vw, 110px);
}
.faq-aside { position: sticky; top: 120px; align-self: start; }
.faq-aside h2 { font-size: clamp(2.25rem, 4vw, 4rem); }
.faq-list { border-top: 1px solid var(--ink); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary {
  position: relative;
  padding: 25px 50px 25px 0;
  cursor: pointer;
  font-weight: 750;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 18px;
  color: var(--signal);
  font: 300 1.7rem/1 sans-serif;
}
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { max-width: 700px; padding: 0 50px 24px 0; margin-bottom: 0; }

.site-footer { color: #dbe4e9; background: #10202b; }
.footer-main {
  width: var(--shell);
  margin: auto;
  padding: 74px 0 62px;
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 100px;
}
.brand-light .brand-mark { background: #dce6eb; }
.brand-light .brand-mark i { background: var(--deep); }
.footer-brand p { max-width: 340px; margin: 22px 0 12px; color: #91a4af; }
.footer-brand > a:last-child { color: #b9ccd7; font-weight: 700; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.footer-links h2 { margin-bottom: 18px; color: #7f95a2; font: 700 .68rem/1 monospace; letter-spacing: .14em; text-transform: uppercase; }
.footer-links a { display: block; margin: 9px 0; color: #bfced6; font-size: .84rem; }
.footer-bottom {
  width: var(--shell);
  margin: auto;
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid #2b3f4c;
  color: #718691;
  font-size: .72rem;
}

/* Download page */
.page-hero {
  width: var(--shell);
  margin: auto;
  padding: clamp(76px, 10vw, 132px) 0 72px;
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 70px;
  align-items: end;
  border-bottom: 1px solid var(--line);
}
.page-hero h1 { margin: 16px 0 20px; font-size: clamp(3rem, 6vw, 6rem); }
.page-hero .page-code { align-self: start; justify-self: end; color: #a5b3bc; font: 700 .7rem/1 monospace; letter-spacing: .16em; }
.system-rail { width: var(--shell); margin: auto; padding: 65px 0 120px; }
.system-card {
  display: grid;
  grid-template-columns: 160px 1fr auto;
  align-items: center;
  gap: 42px;
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}
.system-card:first-child { border-top: 1px solid var(--ink); }
.system-name { display: flex; align-items: center; gap: 16px; }
.system-name b { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid var(--line); font-family: monospace; }
.system-name h2 { margin: 0; font-size: 1.35rem; }
.system-info { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.system-info span { color: #768a97; font-size: .7rem; }
.system-info strong { display: block; font-size: .85rem; }
.install-guide { padding: 110px max(24px, calc((100vw - 1180px) / 2)); background: var(--mist); }
.install-guide header { max-width: 700px; margin-bottom: 60px; }
.step-track { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.step-track article { padding: 38px; background: var(--paper); }
.step-track b { color: #93a5b0; font: 700 .75rem/1 monospace; }
.step-track h3 { margin: 42px 0 12px; font-size: 1.4rem; }
.download-visual {
  width: var(--shell);
  margin: 120px auto;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 80px;
  align-items: center;
}
.download-visual img { display: block; width: 100%; height: auto; object-fit: contain; border: 1px solid var(--line); }
.requirements { border-top: 1px solid var(--ink); }
.requirements div { display: grid; grid-template-columns: 160px 1fr; padding: 16px 0; border-bottom: 1px solid var(--line); }
.requirements dt { color: #778b98; font-size: .75rem; }
.requirements dd { margin: 0; font-size: .86rem; }

/* Help page */
.help-hero {
  padding: clamp(74px, 10vw, 136px) 24px;
  text-align: center;
  background: var(--mist);
}
.help-hero h1 { margin: 15px auto 18px; font-size: clamp(3rem, 7vw, 6.4rem); }
.help-hero p { max-width: 650px; margin-left: auto; margin-right: auto; }
.help-search {
  max-width: 720px;
  margin: 38px auto 0;
  display: flex;
  padding: 7px;
  border: 1px solid var(--line);
  background: var(--white);
}
.help-search input { min-width: 0; flex: 1; padding: 13px 16px; border: 0; color: var(--ink); background: transparent; font: inherit; }
.help-search button { padding: 10px 20px; border: 0; color: var(--white); background: var(--navy); cursor: pointer; }
.help-layout {
  width: var(--shell);
  margin: auto;
  padding: 100px 0 140px;
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 90px;
}
.help-sidebar { position: sticky; top: 112px; align-self: start; border-top: 1px solid var(--ink); }
.help-sidebar a { display: block; padding: 13px 4px; border-bottom: 1px solid var(--line); color: #5c7180; font-size: .84rem; }
.help-content section { padding-bottom: 80px; scroll-margin-top: 110px; }
.help-content h2 { font-size: clamp(2rem, 4vw, 3.4rem); }
.answer-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.answer-grid article { padding: 28px; border: 1px solid var(--line); background: var(--white); }
.answer-grid h3 { font-size: 1.1rem; }
.diagnostic {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 22px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.diagnostic b { color: #8da0ac; font: 700 .8rem/1.7 monospace; }
.diagnostic h3 { margin-bottom: 7px; font-size: 1.12rem; }
.diagnostic p { margin-bottom: 0; }
.support-banner {
  display: grid;
  grid-template-columns: 1fr .55fr;
  align-items: center;
  gap: 40px;
  padding: 48px;
  color: var(--white);
  background: var(--deep);
}
.support-banner p { color: #a9bbc5; }
.support-banner img { display: block; width: 100%; height: auto; object-fit: contain; }

@media (max-width: 1120px) {
  .primary-nav {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    padding: 18px 24px 24px;
    flex-direction: column;
    align-items: stretch;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
  }
  .primary-nav.is-open { display: flex; }
  .primary-nav a { padding: 8px 0; }
  .primary-nav a::after { display: none; }
  .nav-toggle { width: 42px; height: 42px; display: grid; place-content: center; gap: 4px; margin-left: auto; cursor: pointer; }
  .nav-toggle b { width: 20px; height: 2px; background: var(--ink); }
  .hero-grid { grid-template-columns: .9fr 1.1fr; gap: 45px; }
  .price-stack article { grid-template-columns: 1fr 130px; }
  .price-stack ul { grid-column: 1; }
  .price-stack .button { grid-column: 2; grid-row: 2; }
}

@media (max-width: 820px) {
  :root { --shell: min(100% - 32px, 680px); }
  .header-action { display: none; }
  .hero { padding-top: 64px; }
  .hero-grid, .feature-ledger, .pricing-section, .newsroom, .partner-section, .faq-section,
  .page-hero, .download-visual, .help-layout { grid-template-columns: 1fr; }
  .hero h1 { font-size: clamp(3rem, 14vw, 5rem); }
  .hero-copy { padding-bottom: 0; }
  .route-strip { overflow-x: auto; }
  .route-strip span { white-space: nowrap; }
  .metrics { grid-template-columns: 1fr; }
  .metric-row { grid-template-columns: repeat(2, 1fr); }
  .metric-row article:nth-child(3) { border-left: 0; border-top: 1px solid var(--line); }
  .metric-row article:nth-child(4) { border-top: 1px solid var(--line); }
  .ledger-list { border-left: 0; border-top: 1px solid var(--line); }
  .download-matrix { grid-template-columns: 1fr; }
  .pricing-section { gap: 50px; }
  .news-lead { grid-column: 1; }
  .partner-data { border-left: 0; border-top: 1px solid #395064; }
  .faq-aside { position: static; }
  .footer-main { grid-template-columns: 1fr; gap: 50px; }
  .system-card { grid-template-columns: 1fr auto; }
  .system-info { grid-column: 1 / -1; grid-row: 2; }
  .step-track { grid-template-columns: 1fr; }
  .page-hero .page-code { justify-self: start; }
  .help-layout { gap: 55px; }
  .help-sidebar { position: static; display: grid; grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .header-shell { min-height: 66px; }
  .primary-nav { top: 66px; }
  .hero::before { display: none; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 16px; }
  .hero-proof { display: grid; grid-template-columns: repeat(3, 1fr); }
  .hero-proof div { min-width: 0; padding-right: 8px; }
  .hero-proof div + div { padding-left: 8px; }
  .hero-proof dd { font-size: .76rem; }
  .route-strip { gap: 10px; }
  .metric-row { grid-template-columns: 1fr; }
  .metric-row article + article { border-left: 0; border-top: 1px solid var(--line); }
  .ledger-intro { padding: 68px 24px; }
  .ledger-list article { grid-template-columns: 60px 1fr; padding: 27px 24px; }
  .download-head { align-items: start; flex-direction: column; }
  .download-card { grid-template-columns: 50px 1fr; padding: 24px 20px; }
  .platform-glyph { width: 46px; height: 46px; }
  .download-button { grid-column: 1 / -1; width: 100%; }
  .price-stack article { grid-template-columns: 1fr; }
  .price-stack ul, .price-stack .button { grid-column: 1; grid-row: auto; }
  .news-list a { grid-template-columns: 62px 1fr; }
  .news-list b { display: none; }
  .partner-copy { padding: 48px 28px; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .footer-bottom { align-items: flex-start; flex-direction: column; gap: 6px; }
  .system-card { grid-template-columns: 1fr; gap: 22px; }
  .system-info { grid-column: 1; grid-row: auto; grid-template-columns: 1fr; }
  .system-card .download-button { justify-self: stretch; }
  .step-track article { padding: 28px; }
  .answer-grid { grid-template-columns: 1fr; }
  .support-banner { grid-template-columns: 1fr; padding: 30px; }
  .help-search button { padding-inline: 14px; }
}

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

/* Hero media invariants */
.hero-grid { align-items: center !important; }
.hero-media {
  align-self: center !important;
  height: auto !important;
  min-height: 0 !important;
  max-height: none !important;
  padding: 0 !important;
  margin-top: 0 !important;
  margin-bottom: 0 !important;
  overflow: visible !important;
  clip-path: none !important;
  transform: none !important;
}
.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;
  clip-path: none !important;
  transform: none !important;
}
.download-button,
.download-card .download-button,
.system-card .download-button {
  min-width: 132px;
  flex-direction: row !important;
  white-space: nowrap !important;
  word-break: keep-all !important;
  writing-mode: horizontal-tb !important;
}
@media (max-width: 560px) {
  .download-matrix { grid-template-columns: 1fr !important; }
  .download-card { grid-template-columns: 50px 1fr; }
  .download-card .download-button { grid-column: 1 / -1; }
}