:root {
  --ink: #0b1d34;
  --navy: #0d294a;
  --deep: #07182b;
  --blue: #2368a9;
  --mist: #e8f0f7;
  --paper: #f7f9fb;
  --white: #ffffff;
  --muted: #607188;
  --line: #cfdae5;
  --aqua: #86d4d1;
  --max: 1180px;
  --serif: "Songti SC", "STSong", "SimSun", serif;
  --sans: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); line-height: 1.7; }
img { max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
a, button, input, select, textarea, summary { outline-offset: 4px; }
:focus-visible { outline: 3px solid var(--aqua); }
.skip-link { position: fixed; z-index: 100; top: 12px; left: 12px; padding: 10px 16px; color: var(--white); background: var(--deep); transform: translateY(-150%); }
.skip-link:focus { transform: none; }

.site-header { position: sticky; z-index: 30; top: 0; display: grid; grid-template-columns: auto 1fr auto; align-items: center; min-height: 74px; padding: 0 max(24px, calc((100vw - var(--max)) / 2)); border-bottom: 1px solid rgba(207,218,229,.7); background: rgba(247,249,251,.94); backdrop-filter: blur(18px); }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 21px; font-weight: 800; letter-spacing: .08em; }
.brand-mark { display: flex; align-items: flex-end; gap: 3px; width: 25px; height: 25px; padding: 5px; background: var(--navy); }
.brand-mark i { display: block; width: 3px; background: var(--aqua); }
.brand-mark i:nth-child(1) { height: 7px; }
.brand-mark i:nth-child(2) { height: 14px; }
.brand-mark i:nth-child(3) { height: 10px; }
.site-nav { display: flex; justify-content: center; gap: clamp(12px, 1.7vw, 25px); font-size: 14px; }
.site-nav a { position: relative; padding: 25px 0; color: #3b4b5e; white-space: nowrap; }
.site-nav a::after { position: absolute; right: 0; bottom: 18px; left: 0; height: 2px; background: var(--blue); content: ""; transform: scaleX(0); transition: transform .25s ease; }
.site-nav a:hover::after, .site-nav a[aria-current="page"]::after { transform: scaleX(1); }
.header-action { min-width: 100px; padding: 9px 16px; color: var(--white); background: var(--navy); text-align: center; font-size: 14px; font-weight: 700; white-space: nowrap; }
.nav-toggle { display: none; border: 0; background: transparent; color: var(--ink); font-weight: 700; cursor: pointer; }

.section-shell { width: min(var(--max), calc(100% - 48px)); margin-inline: auto; }
.eyebrow { margin: 0 0 12px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .2em; }
.section-heading { margin-bottom: 44px; }
.section-heading h2 { margin: 0; font-family: var(--serif); font-size: clamp(34px, 4vw, 55px); font-weight: 600; line-height: 1.15; letter-spacing: -.04em; }
.section-heading > p:last-child { max-width: 520px; margin: 16px 0 0; color: var(--muted); }
.section-heading.horizontal { display: flex; align-items: flex-end; justify-content: space-between; gap: 50px; }
.section-heading.horizontal > p { margin: 0 0 3px; }
.section-heading.centered { text-align: center; }
.section-heading.centered > p:last-child { margin-inline: auto; }
.button { display: inline-flex; align-items: center; justify-content: center; min-width: 154px; min-height: 48px; padding: 10px 22px; font-weight: 700; white-space: nowrap; word-break: keep-all; writing-mode: horizontal-tb; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button.primary { color: var(--white); background: var(--blue); }
.button.outline { border: 1px solid var(--navy); color: var(--navy); background: transparent; }
.button.light { border-color: rgba(255,255,255,.6); color: var(--white); }
.text-link { display: inline-flex; align-items: center; gap: 8px; color: var(--blue); font-weight: 700; }
.text-link span { transition: transform .2s ease; }
.text-link:hover span { transform: translateX(4px); }

.hero { display: grid; grid-template-columns: minmax(0, .9fr) minmax(440px, 1.1fr); align-items: center; gap: clamp(45px, 8vw, 110px); min-height: 680px; width: min(1320px, calc(100% - 48px)); margin: 0 auto; padding: 72px 0 88px; }
.hero-copy h1 { margin: 0; font-family: var(--serif); font-size: clamp(54px, 6.4vw, 92px); font-weight: 600; line-height: .98; letter-spacing: -.065em; }
.hero-copy h1 span { color: var(--blue); }
.hero-lead { max-width: 610px; margin: 30px 0; color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; align-items: center; gap: 26px; }
.hero-proof { display: flex; gap: 35px; margin: 46px 0 0; padding-top: 22px; border-top: 1px solid var(--line); }
.hero-proof div { min-width: 95px; }
.hero-proof dt { font-family: var(--serif); font-size: 26px; font-weight: 700; line-height: 1; }
.hero-proof dd { margin: 8px 0 0; color: var(--muted); font-size: 12px; }
.hero-media { position: relative; align-self: center; height: auto; padding: 0; margin: 0; overflow: visible; }
.hero-media::before { position: absolute; z-index: -1; inset: -24px 12% 18px -20px; border: 1px solid #bfd0df; background: #eaf1f7; content: ""; }
.hero-media img { display: block; width: 100%; height: auto; object-fit: contain; object-position: center; }
.media-label { position: absolute; z-index: 2; right: -12px; bottom: 28px; display: flex; align-items: center; gap: 14px; padding: 12px 18px; box-shadow: 0 14px 40px rgba(7,24,43,.15); background: var(--white); font-size: 12px; }
.media-label b { color: #167363; }

.metric-ledger { display: grid; grid-template-columns: 1fr 4fr; align-items: stretch; border-block: 1px solid var(--line); background: var(--white); }
.metric-ledger > p { display: grid; place-items: center; margin: 0; padding: 32px; border-right: 1px solid var(--line); color: var(--muted); font-size: 13px; letter-spacing: .14em; }
.metric-ledger dl { display: grid; grid-template-columns: repeat(4, 1fr); margin: 0; }
.metric-ledger dl div { padding: 30px clamp(20px, 3.5vw, 56px); border-right: 1px solid var(--line); }
.metric-ledger dt { font-family: var(--serif); font-size: clamp(32px, 3.5vw, 52px); line-height: 1; }
.metric-ledger dt span { margin-left: 3px; color: var(--blue); font-family: var(--sans); font-size: 14px; }
.metric-ledger dd { margin: 8px 0 0; color: var(--muted); font-size: 13px; }

.news-board { padding: 120px 0; }
.news-layout { display: grid; grid-template-columns: 1.05fr .95fr; border: 1px solid var(--line); }
.news-feature { min-height: 360px; padding: clamp(32px, 5vw, 65px); color: var(--white); background: var(--navy); }
.news-feature span { color: var(--aqua); font-size: 12px; }
.news-feature h3 { max-width: 570px; margin: 40px 0 20px; font-family: var(--serif); font-size: clamp(29px, 3.2vw, 43px); font-weight: 500; line-height: 1.28; }
.news-feature p { max-width: 510px; color: #b9c9d9; }
.news-feature a { display: inline-block; margin-top: 28px; border-bottom: 1px solid var(--aqua); color: var(--aqua); }
.news-list article { display: grid; grid-template-columns: 80px 1fr; gap: 20px; padding: 25px 30px; border-bottom: 1px solid var(--line); background: var(--white); }
.news-list article:last-child { border-bottom: 0; }
.news-list time { color: var(--blue); font-family: var(--serif); font-size: 23px; }
.news-list h3 { margin: 0; font-size: 17px; }
.news-list p { margin: 5px 0 0; color: var(--muted); font-size: 14px; }

.pricing-section { padding: 110px 0; background: var(--mist); }
.price-trio { display: grid; grid-template-columns: repeat(3, 1fr); align-items: stretch; gap: 16px; }
.price-card { position: relative; display: flex; flex-direction: column; min-height: 480px; padding: 38px; border-top: 4px solid #a9bacb; background: var(--white); }
.price-card.featured { border-color: var(--blue); box-shadow: 0 18px 55px rgba(13,41,74,.12); transform: translateY(-10px); }
.plan-for { margin: 0; color: var(--muted); font-size: 12px; }
.price-card h3 { margin: 8px 0 20px; font-size: 23px; }
.price { margin: 0 0 28px; font-family: var(--serif); font-size: 64px; line-height: 1; }
.price > span { font-family: var(--sans); font-size: 20px; }
.price small { color: var(--muted); font-family: var(--sans); font-size: 14px; }
.price-card ul { flex: 1; margin: 0 0 30px; padding: 0; list-style: none; }
.price-card li { padding: 11px 0; border-bottom: 1px solid #e8edf1; color: #42536a; }
.price-card li::before { margin-right: 9px; color: var(--blue); content: "—"; }
.recommend { position: absolute; top: 0; right: 0; padding: 5px 12px; color: var(--white); background: var(--blue); font-size: 11px; }

.feature-atlas { padding: 125px 0; }
.feature-grid { display: grid; grid-template-columns: 1.15fr 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.feature-grid article { min-height: 235px; padding: 34px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--white); }
.feature-grid .feature-main { grid-row: span 2; min-height: 470px; padding: 45px; background: #e3edf5; }
.feature-grid .feature-main h3 { margin-top: 110px; font-size: 37px; }
.feature-grid .feature-wide { grid-column: span 2; }
.line-icon { color: var(--blue); font-family: var(--serif); font-size: 34px; }
.feature-grid h3 { margin: 32px 0 10px; font-size: 21px; }
.feature-grid p { max-width: 390px; margin: 0; color: var(--muted); }

.download-runway { padding: 115px 0; color: var(--white); background: var(--deep); }
.download-runway .eyebrow { color: var(--aqua); }
.section-heading.inverse > p { color: #aebdcb; }
.platform-list { border-top: 1px solid #36506c; }
.platform-list article { display: grid; grid-template-columns: 70px 1.25fr 1fr auto; align-items: center; gap: 26px; padding: 22px 12px; border-bottom: 1px solid #36506c; }
.platform-code { color: var(--aqua); font-family: var(--serif); font-size: 15px; letter-spacing: .15em; }
.platform-list h3 { margin: 0; font-size: 19px; }
.platform-list p, .platform-list article > span { margin: 3px 0 0; color: #97aabe; font-size: 13px; }
.platform-list a { min-width: 172px; padding: 10px 18px; border: 1px solid #57718c; text-align: center; font-weight: 700; white-space: nowrap; word-break: keep-all; writing-mode: horizontal-tb; }
.platform-list a:hover { color: var(--deep); background: var(--aqua); }
.download-more { display: flex; justify-content: space-between; margin-top: 34px; padding-bottom: 8px; border-bottom: 1px solid #61788e; color: var(--aqua); }

.partner-section { display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: clamp(50px, 9vw, 130px); padding-block: 130px; }
.partner-image { border-left: 12px solid var(--navy); }
.partner-image img { display: block; width: 100%; height: auto; object-fit: contain; }
.partner-copy h2 { max-width: 600px; margin: 0; font-family: var(--serif); font-size: clamp(40px, 4.8vw, 65px); font-weight: 500; line-height: 1.1; }
.partner-copy > p:not(.eyebrow) { max-width: 580px; margin: 25px 0 32px; color: var(--muted); }
.partner-copy dl { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 0 0 35px; }
.partner-copy dt { font-family: var(--serif); font-size: 32px; font-weight: 700; }
.partner-copy dd { margin: 3px 0 0; color: var(--muted); font-size: 12px; }

.faq-preview { padding: 120px 0; background: var(--white); }
.faq-split { display: grid; grid-template-columns: .75fr 1.25fr; gap: clamp(50px, 8vw, 110px); }
.faq-split header h2 { margin: 0; font-family: var(--serif); font-size: clamp(38px, 4vw, 55px); font-weight: 500; line-height: 1.15; }
.faq-split header > p:not(.eyebrow) { color: var(--muted); }
.faq-split header img { display: block; width: 100%; height: auto; margin-top: 35px; object-fit: contain; }
.accordion details, .answer-group details { border-bottom: 1px solid var(--line); }
.accordion summary, .answer-group summary { position: relative; padding: 21px 40px 21px 0; font-weight: 700; cursor: pointer; list-style: none; }
.accordion summary::after, .answer-group summary::after { position: absolute; right: 5px; content: "+"; color: var(--blue); font-size: 22px; }
.accordion details[open] summary::after, .answer-group details[open] summary::after { content: "−"; }
.accordion details p, .answer-group details p { margin: -4px 0 22px; color: var(--muted); }
.accordion .text-link { margin-top: 28px; }

.site-footer { color: #c0cbd6; background: #061322; }
.footer-main { display: grid; grid-template-columns: 1.8fr repeat(3, 1fr); gap: 70px; width: min(var(--max), calc(100% - 48px)); margin: auto; padding: 75px 0 58px; }
.site-footer .brand { color: var(--white); }
.footer-brand p { max-width: 280px; color: #788ca0; }
.footer-main h2 { margin: 0 0 18px; color: var(--white); font-size: 14px; }
.footer-main > div:not(.footer-brand) { display: flex; flex-direction: column; gap: 10px; font-size: 13px; }
.footer-main a:hover { color: var(--aqua); }
.footer-bottom { display: flex; justify-content: space-between; width: min(var(--max), calc(100% - 48px)); margin: auto; padding: 20px 0; border-top: 1px solid #1a2c3e; color: #718396; font-size: 12px; }
.footer-bottom p { margin: 0; }

/* download page */
.download-hero { display: grid; grid-template-columns: .85fr 1.15fr; align-items: center; gap: 60px; min-height: 610px; width: min(1320px, calc(100% - 48px)); margin: auto; padding: 70px 0; }
.download-hero h1, .help-hero h1 { margin: 0; font-family: var(--serif); font-size: clamp(50px, 6vw, 82px); font-weight: 500; line-height: 1.04; letter-spacing: -.06em; }
.download-hero > div:first-child > p:not(.eyebrow) { max-width: 590px; color: var(--muted); font-size: 18px; }
.download-hero-media { align-self: center; height: auto; padding: 0; margin: 0; }
.download-hero-media img { display: block; width: 100%; height: auto; object-fit: contain; object-position: center; }
.compatibility { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 30px; }
.compatibility span { padding: 6px 10px; border: 1px solid var(--line); color: #516176; font-size: 11px; }
.download-selector { padding: 110px 0 125px; }
.download-quadrants { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.download-quadrants article { display: grid; grid-template-columns: 60px 1fr; gap: 15px 20px; padding: clamp(28px, 4vw, 50px); background: var(--white); }
.os-badge { display: grid; place-items: center; width: 54px; height: 54px; color: var(--white); background: var(--navy); font-family: var(--serif); font-size: 24px; }
.os-title p { margin: 0; color: var(--muted); font-size: 11px; }
.os-title h3 { margin: 0; font-size: 26px; }
.download-quadrants dl, .download-quadrants ul, .download-quadrants .button { grid-column: 1 / -1; }
.download-quadrants dl { display: grid; grid-template-columns: 1fr 1fr 1.5fr; margin: 12px 0; border-block: 1px solid #e1e8ef; }
.download-quadrants dl div { padding: 12px 8px; }
.download-quadrants dt { color: var(--muted); font-size: 11px; }
.download-quadrants dd { margin: 2px 0 0; font-size: 13px; }
.download-quadrants ul { margin: 0; padding-left: 20px; color: var(--muted); font-size: 14px; }
.download-quadrants .button { justify-self: start; margin-top: 12px; }
.install-path { padding: 105px 0; background: var(--mist); }
.install-path ol { display: grid; grid-template-columns: repeat(3, 1fr); margin: 0; padding: 0; list-style: none; }
.install-path li { display: grid; grid-template-columns: auto 1fr; gap: 20px; padding: 32px; border-right: 1px solid #bdccda; }
.install-path li:last-child { border-right: 0; }
.install-path li > span { color: var(--blue); font-family: var(--serif); font-size: 28px; }
.install-path h3 { margin: 0; }
.install-path p { margin: 8px 0 0; color: var(--muted); }
.version-note { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 90px; padding-block: 120px; }
.version-art img { display: block; width: 100%; height: auto; object-fit: contain; }
.version-note h2 { margin: 0; font-family: var(--serif); font-size: 51px; font-weight: 500; }
.release-list { margin: 28px 0; padding: 0; list-style: none; }
.release-list li { display: grid; grid-template-columns: 60px 1fr; gap: 15px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.release-list span { color: var(--blue); font-weight: 700; }
.release-list p { margin: 0; color: var(--muted); }
.download-assurance { display: grid; grid-template-columns: 1fr 1.4fr auto; align-items: center; gap: 50px; padding: 60px max(24px, calc((100vw - var(--max)) / 2)); color: var(--white); background: var(--navy); }
.download-assurance h2 { margin: 0; font-family: var(--serif); font-size: 38px; font-weight: 500; }
.download-assurance > p { color: #b9c9d9; }

/* help page */
.help-hero { display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 85px; min-height: 580px; width: min(var(--max), calc(100% - 48px)); margin: auto; padding: 80px 0; }
.help-intro > p:not(.eyebrow) { max-width: 690px; color: var(--muted); font-size: 18px; }
.help-intro img { display: block; width: min(100%, 640px); height: auto; margin-top: 35px; object-fit: contain; }
.help-index { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.help-index a { display: grid; grid-template-columns: 30px 1fr; gap: 10px; min-height: 125px; padding: 20px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--white); }
.help-index b { color: var(--blue); font-family: var(--serif); }
.help-index span { font-weight: 700; }
.help-index small { display: block; margin-top: 6px; color: var(--muted); font-size: 11px; font-weight: 400; }
.answer-library { display: grid; grid-template-columns: 220px 1fr; gap: 85px; padding: 80px 0 120px; }
.answer-library aside { position: sticky; top: 110px; align-self: start; display: flex; flex-direction: column; border-left: 2px solid var(--line); }
.answer-library aside p { margin: 0 0 12px; padding-left: 20px; color: var(--muted); font-size: 12px; }
.answer-library aside a { padding: 9px 20px; font-weight: 700; }
.answer-library aside a:hover { border-left: 2px solid var(--blue); color: var(--blue); transform: translateX(-2px); }
.answer-group { scroll-margin-top: 100px; margin-bottom: 85px; }
.answer-group header { display: grid; grid-template-columns: 120px 1fr; align-items: end; gap: 20px; margin-bottom: 22px; padding-bottom: 22px; border-bottom: 2px solid var(--navy); }
.answer-group header span { color: var(--blue); font-size: 12px; font-weight: 700; }
.answer-group h2 { margin: 0; font-family: var(--serif); font-size: clamp(29px, 3vw, 42px); font-weight: 500; line-height: 1.2; }
.answer-group details { margin-left: 140px; }
.answer-group details a { color: var(--blue); text-decoration: underline; }
.checklist { margin: 35px 0 35px 140px; padding: 0; list-style: none; counter-reset: help; }
.checklist li { position: relative; padding: 0 0 28px 65px; counter-increment: help; }
.checklist li::before { position: absolute; left: 0; display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid var(--blue); color: var(--blue); content: counter(help); font-family: var(--serif); }
.checklist li:not(:last-child)::after { position: absolute; top: 38px; bottom: 0; left: 19px; width: 1px; background: var(--line); content: ""; }
.checklist p { margin: 5px 0 0; color: var(--muted); }
.still-stuck { margin-left: 140px; padding: 30px; border-left: 5px solid var(--aqua); background: var(--navy); color: var(--white); }
.still-stuck h3 { margin: 0; }
.still-stuck p { color: #b9c9d9; }
.contact-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; padding: 90px max(24px, calc((100vw - var(--max)) / 2)); background: var(--mist); }
.contact-panel h2 { margin: 0; font-family: var(--serif); font-size: clamp(39px, 4vw, 58px); font-weight: 500; line-height: 1.15; }
.contact-panel > div > p:not(.eyebrow) { max-width: 540px; color: var(--muted); }
.contact-panel dl { display: flex; gap: 55px; margin-top: 35px; }
.contact-panel dt { color: var(--muted); font-size: 11px; }
.contact-panel dd { margin: 3px 0 0; font-weight: 700; }
.contact-panel form { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 18px; padding: 35px; background: var(--white); }
.contact-panel label { align-self: end; font-size: 12px; font-weight: 700; }
.contact-panel input, .contact-panel select, .contact-panel textarea { min-width: 0; padding: 10px 12px; border: 1px solid var(--line); border-radius: 0; background: var(--paper); }
.contact-panel select, .contact-panel input { grid-row: 2; }
.contact-panel label[for="message"], .contact-panel textarea, .contact-panel .form-submit { grid-column: 1 / -1; }
.form-submit { justify-self: start; margin-top: 8px; }

@media (max-width: 1100px) {
  .site-header { grid-template-columns: auto auto 1fr; gap: 22px; }
  .nav-toggle { display: block; }
  .site-nav { position: absolute; top: 74px; right: 0; left: 0; display: none; flex-direction: column; gap: 0; padding: 12px 24px 24px; border-bottom: 1px solid var(--line); background: var(--paper); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 10px 0; }
  .site-nav a::after { bottom: 6px; }
  .header-action { justify-self: end; }
  .hero { grid-template-columns: 1fr 1fr; gap: 45px; }
  .metric-ledger { grid-template-columns: 1fr; }
  .metric-ledger > p { border-right: 0; border-bottom: 1px solid var(--line); }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .feature-grid .feature-main { grid-row: auto; min-height: 235px; }
  .feature-grid .feature-main h3 { margin-top: 32px; font-size: 21px; }
  .download-assurance { grid-template-columns: 1fr 1fr; }
  .download-assurance .button { justify-self: start; }
}

@media (max-width: 800px) {
  .section-shell { width: min(100% - 32px, var(--max)); }
  .section-heading.horizontal { display: block; }
  .section-heading.horizontal > p { margin-top: 16px; }
  .site-header { padding-inline: 16px; }
  .header-action { display: none; }
  .hero, .download-hero, .help-hero { grid-template-columns: 1fr; min-height: auto; width: calc(100% - 32px); padding: 65px 0; }
  .hero { gap: 65px; }
  .hero-copy h1 { font-size: clamp(49px, 15vw, 72px); }
  .hero-proof { gap: 15px; }
  .hero-media::before { inset: -14px 20px 12px -8px; }
  .media-label { right: 5px; bottom: 10px; }
  .metric-ledger dl { grid-template-columns: 1fr 1fr; }
  .metric-ledger dl div:nth-child(2) { border-right: 0; }
  .news-board, .feature-atlas { padding: 85px 0; }
  .news-layout, .partner-section, .faq-split, .version-note, .contact-panel { grid-template-columns: 1fr; }
  .price-trio { grid-template-columns: 1fr; }
  .price-card.featured { transform: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid .feature-wide { grid-column: auto; }
  .platform-list article { grid-template-columns: 55px 1fr; gap: 14px; }
  .platform-list article > span, .platform-list article > a { grid-column: 2; }
  .platform-list article > a { justify-self: start; }
  .partner-section { gap: 50px; padding-block: 85px; }
  .faq-preview { padding: 85px 0; }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 40px; width: calc(100% - 32px); }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { width: calc(100% - 32px); }
  .download-quadrants { grid-template-columns: 1fr; }
  .install-path ol { grid-template-columns: 1fr; }
  .install-path li { border-right: 0; border-bottom: 1px solid #bdccda; }
  .version-note { gap: 45px; }
  .download-assurance { grid-template-columns: 1fr; gap: 15px; }
  .answer-library { grid-template-columns: 1fr; gap: 30px; padding-top: 35px; }
  .answer-library aside { position: static; flex-flow: row wrap; border-left: 0; border-bottom: 1px solid var(--line); }
  .answer-library aside p { width: 100%; padding-left: 0; }
  .answer-library aside a { padding: 8px 14px 8px 0; }
  .answer-group header { grid-template-columns: 1fr; gap: 8px; }
  .answer-group details, .checklist, .still-stuck { margin-left: 0; }
  .contact-panel { gap: 35px; }
}

@media (max-width: 520px) {
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .hero-proof { flex-wrap: wrap; }
  .metric-ledger dl { grid-template-columns: 1fr; }
  .metric-ledger dl div { border-right: 0; border-bottom: 1px solid var(--line); }
  .news-list article { grid-template-columns: 58px 1fr; padding-inline: 18px; }
  .feature-grid article { min-height: auto; padding: 28px; }
  .partner-copy dl { grid-template-columns: 1fr 1fr; }
  .platform-list article { grid-template-columns: 1fr; }
  .platform-list article > span, .platform-list article > a { grid-column: 1; }
  .footer-main { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .footer-bottom { align-items: flex-start; flex-direction: column; gap: 8px; }
  .download-quadrants article { grid-template-columns: 54px 1fr; padding: 25px 20px; }
  .download-quadrants dl { grid-template-columns: 1fr; }
  .download-quadrants dl div { border-bottom: 1px solid #e1e8ef; }
  .help-index { grid-template-columns: 1fr; }
  .contact-panel form { grid-template-columns: 1fr; padding: 24px 18px; }
  .contact-panel select, .contact-panel input { grid-row: auto; }
  .contact-panel label, .contact-panel input, .contact-panel select, .contact-panel textarea, .contact-panel .form-submit { grid-column: 1; }
  .contact-panel dl { flex-direction: column; gap: 16px; }
}

@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; }
}

/* Required media integrity override */
.hero { align-items: center; }
.hero-media { align-self: center; height: auto; min-height: 0; max-height: none; margin: 0; padding: 0; overflow: visible; clip-path: none; transform: none; }
.hero-media img { display: block; width: 100%; height: auto; min-height: 0; max-height: none; margin: 0; padding: 0; object-fit: contain; object-position: center; clip-path: none; transform: none; }
.download-hero { align-items: center; }
.download-hero-media { align-self: center; height: auto; min-height: 0; max-height: none; margin: 0; padding: 0; overflow: visible; clip-path: none; transform: none; }
.download-hero-media img { display: block; width: 100%; height: auto; min-height: 0; max-height: none; margin: 0; padding: 0; object-fit: contain; object-position: center; clip-path: none; transform: none; }
.platform-list a, .download-quadrants .button, .price-card .button { display: inline-flex; align-items: center; justify-content: center; min-width: 154px; white-space: nowrap; word-break: keep-all; writing-mode: horizontal-tb; }