:root {
  --brand: #2980FE;
  --brand-dark: #1767D6;
  --brand-soft: #EAF3FF;
  --surface-soft: #F5F8FD;
  --surface: #FFFFFF;
  --text: #172033;
  --body: #465266;
  --muted: #718096;
  --border: #DCE6F2;
  --footer: #10233F;
  --shadow: 0 18px 48px rgba(35, 79, 136, .11);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --container: min(1180px, calc(100% - 40px));
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--text); background: #fff; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", sans-serif; line-height: 1.75; overflow-x: hidden; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 1000; padding: 10px 16px; border-radius: 10px; background: #fff; box-shadow: var(--shadow); }
.skip-link:focus { top: 16px; }
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.94); backdrop-filter: blur(16px); border-bottom: 1px solid rgba(220,230,242,.82); }
.header-inner { width: var(--container); height: 78px; margin: 0 auto; display: flex; align-items: center; gap: 22px; }
.brand { flex: 0 0 auto; display: inline-flex; align-items: center; }
.brand img { width: 156px; max-height: 44px; object-fit: contain; }
.desktop-nav { flex: 1 1 auto; display: flex; justify-content: center; align-items: center; gap: 3px; min-width: 0; }
.nav-link { min-height: 46px; padding: 10px 10px; display: inline-flex; align-items: center; white-space: nowrap; border-radius: 12px; color: #344157; font-size: 14px; font-weight: 700; transition: .2s ease; }
.nav-link:hover, .nav-link:focus-visible, .nav-link.is-active { color: var(--brand-dark); background: var(--brand-soft); }
.nav-group { position: relative; }
.mega-menu { position: absolute; left: 50%; top: calc(100% + 14px); width: 640px; padding: 18px; display: grid; grid-template-columns: 1.15fr 1fr 1fr; gap: 10px; background: #fff; border: 1px solid var(--border); border-radius: 20px; box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translate(-50%, 10px); transition: .2s ease; }
.mega-menu::before { content: ""; position: absolute; left: 0; right: 0; top: -18px; height: 18px; }
.mega-menu-right { left: auto; right: -70px; transform: translate(0, 10px); }
.nav-group:hover .mega-menu, .nav-group:focus-within .mega-menu { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.nav-group:hover .mega-menu-right, .nav-group:focus-within .mega-menu-right { transform: translate(0, 0); }
.mega-menu a, .mega-intro { border-radius: 14px; padding: 14px; }
.mega-menu a:hover, .mega-menu a:focus-visible { background: var(--surface-soft); }
.mega-menu b, .mega-intro strong { display: block; color: var(--text); font-size: 15px; }
.mega-menu small, .mega-intro span { display: block; margin-top: 3px; color: var(--muted); line-height: 1.5; font-size: 12px; }
.mega-intro { grid-row: span 2; background: linear-gradient(145deg, var(--brand), var(--brand-dark)); color: #fff; }
.mega-intro strong, .mega-intro span { color: #fff; }
.header-actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.download-btn { min-height: 46px; padding: 10px 22px; display: inline-flex; align-items: center; justify-content: center; border-radius: 14px; background: linear-gradient(135deg, var(--brand), var(--brand-dark)); color: #fff; font-weight: 800; box-shadow: 0 12px 28px rgba(41,128,254,.24); transition: transform .2s ease, box-shadow .2s ease; }
.download-btn:hover, .download-btn:focus-visible { transform: translateY(-2px); box-shadow: 0 16px 32px rgba(41,128,254,.3); }
.menu-toggle { width: 46px; height: 46px; border: 1px solid var(--border); background: #fff; border-radius: 14px; display: inline-flex; flex-direction: column; justify-content: center; align-items: center; gap: 5px; }
.menu-toggle span { width: 20px; height: 2px; background: var(--text); border-radius: 2px; }
.menu-overlay { position: fixed; inset: 0; z-index: 120; background: rgba(16,35,63,.46); opacity: 0; transition: opacity .22s ease; }
.menu-overlay.is-visible { opacity: 1; }
.mobile-menu { position: fixed; top: 0; right: 0; z-index: 130; width: min(460px, 92vw); height: 100dvh; background: #fff; box-shadow: -20px 0 60px rgba(16,35,63,.2); transform: translateX(105%); transition: transform .25s ease; display: flex; flex-direction: column; }
.mobile-menu.is-open { transform: translateX(0); }
.mobile-menu-head { min-height: 76px; padding: 16px 20px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.menu-close { width: 44px; height: 44px; border: 0; border-radius: 13px; background: var(--surface-soft); color: var(--text); font-size: 30px; line-height: 1; }
.mobile-menu-body { padding: 14px 20px 32px; overflow-y: auto; }
.mobile-home, .mobile-menu summary, .mobile-menu details a { min-height: 48px; display: flex; align-items: center; border-radius: 12px; font-weight: 750; }
.mobile-home, .mobile-menu summary { padding: 10px 12px; }
.mobile-menu summary { justify-content: space-between; list-style: none; cursor: pointer; }
.mobile-menu summary::after { content: "+"; font-size: 21px; color: var(--brand); }
.mobile-menu details[open] summary::after { content: "−"; }
.mobile-menu details div { padding: 0 8px 8px 18px; }
.mobile-menu details a { padding: 8px 12px; color: var(--body); font-size: 15px; }
.mobile-menu details a:hover { background: var(--surface-soft); color: var(--brand-dark); }
.mobile-menu-foot { margin-top: auto; padding: 18px 20px calc(18px + env(safe-area-inset-bottom)); border-top: 1px solid var(--border); }
.mobile-menu-foot .download-btn { width: 100%; }
main { display: block; }
.container { width: var(--container); margin: 0 auto; }
.section { padding: 96px 0; }
.section-sm { padding: 66px 0; }
.section-soft { background: var(--surface-soft); }
.section-blue { background: linear-gradient(145deg, #0f5bc1, #1f7cf0); color: #fff; }
.eyebrow { margin: 0 0 14px; color: var(--brand-dark); text-transform: uppercase; letter-spacing: .12em; font-size: 13px; font-weight: 850; }
.section-blue .eyebrow { color: #dbeaff; }
h1, h2, h3 { margin: 0; line-height: 1.22; letter-spacing: -.025em; }
h1 { font-size: clamp(42px, 6vw, 72px); }
h2 { font-size: clamp(32px, 4vw, 48px); }
h3 { font-size: 22px; }
p { margin: 0; color: var(--body); }
.section-blue p { color: rgba(255,255,255,.82); }
.lead { margin-top: 22px; font-size: clamp(18px, 2vw, 21px); line-height: 1.85; }
.section-heading { max-width: 760px; margin-bottom: 46px; }
.section-heading p { margin-top: 16px; font-size: 17px; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.text-link, .secondary-btn { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; font-weight: 800; }
.secondary-btn { padding: 10px 20px; border: 1px solid var(--border); border-radius: 14px; background: #fff; color: var(--brand-dark); }
.text-link { color: var(--brand-dark); }
.text-link::after { content: "→"; margin-left: 8px; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }
.hero { position: relative; padding: 74px 0 58px; overflow: hidden; background: radial-gradient(circle at 85% 20%, rgba(41,128,254,.16), transparent 30%), linear-gradient(180deg, #fff, #f7fbff); }
.hero::after { content: ""; position: absolute; width: 420px; height: 420px; right: -180px; bottom: -180px; border: 1px solid rgba(41,128,254,.18); border-radius: 50%; box-shadow: 0 0 0 70px rgba(41,128,254,.035), 0 0 0 140px rgba(41,128,254,.025); }
.hero-grid { width: var(--container); margin: 0 auto; display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 52px; }
.hero-copy { position: relative; z-index: 2; }
.hero-copy .lead { max-width: 760px; }
.hero-labels { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 10px; }
.hero-labels span { padding: 7px 13px; border: 1px solid #cfe2fb; border-radius: 999px; background: rgba(255,255,255,.8); color: #2d4b70; font-size: 14px; font-weight: 750; }
.hero-visual { position: relative; z-index: 2; min-height: 510px; display: grid; place-items: center; }
.hero-visual::before { content: ""; position: absolute; inset: 8% 2%; border-radius: 50%; background: radial-gradient(circle, #dcecff, transparent 66%); }
.hero-visual > img { position: relative; z-index: 2; max-height: 500px; object-fit: contain; filter: drop-shadow(0 28px 34px rgba(26,68,120,.18)); }
.float-note { position: absolute; z-index: 3; max-width: 180px; padding: 13px 15px; border: 1px solid rgba(220,230,242,.9); border-radius: 15px; background: rgba(255,255,255,.92); box-shadow: var(--shadow); font-size: 13px; font-weight: 800; }
.float-note.one { left: -10px; top: 16%; }
.float-note.two { right: -4px; top: 42%; }
.float-note.three { left: 6%; bottom: 7%; }
.capability-bar { position: relative; z-index: 5; width: var(--container); margin: -2px auto 0; display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow); overflow: hidden; }
.capability { padding: 26px; border-right: 1px solid var(--border); }
.capability:last-child { border-right: 0; }
.capability b { display: block; margin-bottom: 7px; font-size: 17px; }
.capability p { font-size: 14px; line-height: 1.65; }
.category-grid { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-flow: dense; gap: 18px; }
.category-card { min-height: 225px; padding: 28px; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; display: flex; flex-direction: column; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.category-card:hover { transform: translateY(-4px); border-color: #b8d4f8; box-shadow: var(--shadow); }
.category-card.featured { grid-column: span 2; background: linear-gradient(135deg, #2980FE, #1767D6); color: #fff; }
.category-card.wide { grid-column: span 2; }
.category-card h3 { margin-bottom: 12px; }
.category-card p { flex: 1; font-size: 15px; }
.category-card.featured p, .category-card.featured .text-link { color: #fff; }
.category-icon { width: 46px; height: 46px; margin-bottom: 20px; display: grid; place-items: center; border-radius: 15px; background: var(--brand-soft); color: var(--brand-dark); font-weight: 900; }
.category-card.featured .category-icon { background: rgba(255,255,255,.16); color: #fff; }
.feature-panel { border-radius: var(--radius-lg); background: linear-gradient(135deg, #eaf3ff, #f8fbff); padding: 48px; display: grid; grid-template-columns: .9fr 1.1fr; gap: 54px; align-items: center; }
.feature-panel .image-panel { min-height: 460px; display: grid; place-items: center; border-radius: 24px; background: rgba(255,255,255,.8); }
.image-panel img { max-height: 430px; object-fit: contain; }
.feature-copy p + p { margin-top: 14px; }
.check-list { margin: 26px 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; list-style: none; }
.check-list li { position: relative; padding: 13px 14px 13px 40px; border-radius: 13px; background: #fff; color: var(--body); font-weight: 650; }
.check-list li::before { content: "✓"; position: absolute; left: 14px; top: 12px; width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; background: var(--brand-soft); color: var(--brand-dark); font-size: 12px; }
.split-offset { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
.offset-panel { padding: 38px; border-radius: var(--radius-lg); border: 1px solid var(--border); background: #fff; }
.offset-panel:nth-child(2) { margin-top: 72px; background: var(--surface-soft); }
.offset-panel ul, .content-card ul { margin: 24px 0 0; padding-left: 20px; color: var(--body); }
.offset-panel li, .content-card li { margin: 8px 0; }
.topic-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 24px; }
.topic-panel { position: relative; min-height: 390px; padding: 40px; border-radius: var(--radius-lg); overflow: hidden; background: #fff; border: 1px solid var(--border); }
.topic-panel.soft { background: linear-gradient(145deg, #eaf3ff, #fff); }
.topic-panel img { position: absolute; right: -4%; bottom: -2%; width: 45%; max-height: 260px; object-fit: contain; opacity: .95; }
.topic-panel .topic-copy { position: relative; z-index: 2; max-width: 60%; }
.topic-panel p { margin-top: 16px; }
.security-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 48px; align-items: center; }
.security-notes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.security-note { padding: 20px; border-radius: 16px; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.18); }
.security-note b { display: block; margin-bottom: 8px; }
.security-note p { font-size: 14px; }
.hardware-grid, .swap-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; align-items: center; }
.product-image { min-height: 450px; padding: 28px; display: grid; place-items: center; border-radius: var(--radius-lg); background: radial-gradient(circle, #e6f1ff, #f9fbfe 70%); }
.product-image img { max-height: 390px; object-fit: contain; }
.safety-box { margin-top: 24px; padding: 22px; border-left: 4px solid var(--brand); border-radius: 8px 16px 16px 8px; background: var(--surface-soft); }
.swap-checks { padding: 34px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow); }
.swap-checks ol { margin: 22px 0 0; padding: 0; list-style: none; counter-reset: checks; display: grid; gap: 11px; }
.swap-checks li { counter-increment: checks; padding: 12px 14px 12px 48px; position: relative; border-radius: 12px; background: var(--surface-soft); color: var(--body); }
.swap-checks li::before { content: counter(checks); position: absolute; left: 13px; top: 11px; width: 25px; height: 25px; display: grid; place-items: center; border-radius: 8px; background: var(--brand); color: #fff; font-size: 12px; font-weight: 800; }
.steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 0; }
.step { position: relative; padding: 0 18px; }
.step:not(:last-child)::after { content: ""; position: absolute; top: 23px; right: -10px; width: 20px; height: 2px; background: #bcd5f5; }
.step-number { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 16px; background: var(--brand); color: #fff; font-weight: 900; box-shadow: 0 10px 25px rgba(41,128,254,.22); }
.step h3 { margin-top: 18px; font-size: 18px; }
.step p { margin-top: 10px; font-size: 14px; }
.step .text-link { margin-top: 8px; min-height: 36px; font-size: 14px; }
.ecosystem-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.ecosystem-card { padding: 38px; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--border); }
.ecosystem-card:nth-child(2) { background: linear-gradient(145deg, #f5f8fd, #eaf3ff); }
.timeline { position: relative; display: grid; gap: 16px; }
.timeline::before { content: ""; position: absolute; left: 115px; top: 10px; bottom: 10px; width: 1px; background: var(--border); }
.timeline-item { display: grid; grid-template-columns: 95px 1fr; gap: 40px; align-items: start; }
.timeline-date { color: var(--brand-dark); font-weight: 850; font-size: 14px; }
.timeline-content { position: relative; padding: 20px 22px; border: 1px solid var(--border); border-radius: 16px; background: #fff; }
.timeline-content::before { content: ""; position: absolute; left: -47px; top: 25px; width: 11px; height: 11px; border-radius: 50%; background: var(--brand); box-shadow: 0 0 0 6px var(--brand-soft); }
.timeline-content p { margin-top: 7px; font-size: 15px; }
.review-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.review { padding: 26px; border-radius: 18px; background: #fff; border: 1px solid var(--border); }
.review:nth-child(even) { transform: translateY(20px); }
.review p { font-size: 15px; }
.review b { display: block; margin-top: 18px; color: var(--brand-dark); font-size: 14px; }
.faq-list { display: grid; gap: 12px; }
.faq-item { border: 1px solid var(--border); border-radius: 16px; background: #fff; overflow: hidden; }
.faq-item button { width: 100%; min-height: 62px; padding: 17px 58px 17px 20px; position: relative; border: 0; background: transparent; text-align: left; color: var(--text); font-weight: 800; }
.faq-item button::after { content: "+"; position: absolute; right: 20px; top: 50%; transform: translateY(-50%); color: var(--brand); font-size: 24px; }
.faq-item.is-open button::after { content: "−"; }
.faq-answer { padding: 0 20px 20px; }
.faq-answer p { font-size: 15px; }
.cta { padding: 70px 0; }
.cta-box { padding: 58px 36px; text-align: center; border-radius: var(--radius-lg); background: radial-gradient(circle at 20% 20%, rgba(255,255,255,.18), transparent 30%), linear-gradient(135deg, #2980FE, #1767D6); color: #fff; box-shadow: 0 24px 60px rgba(28,103,214,.25); }
.cta-box p { max-width: 700px; margin: 16px auto 0; color: rgba(255,255,255,.84); }
.cta-box .download-btn { margin-top: 26px; background: #fff; color: var(--brand-dark); box-shadow: none; }
.page-hero { padding: 80px 0 68px; background: linear-gradient(180deg, #f4f9ff, #fff); border-bottom: 1px solid #edf2f8; }
.page-hero-grid { width: var(--container); margin: 0 auto; display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.page-hero h1 { font-size: clamp(40px, 5.4vw, 64px); }
.page-hero p { margin-top: 22px; font-size: 18px; }
.page-hero-aside { padding: 28px; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow); }
.page-hero-aside strong { display: block; color: var(--brand-dark); font-size: 18px; }
.page-hero-aside ul { margin: 16px 0 0; padding-left: 20px; color: var(--body); }
.content-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.content-card { padding: 30px; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; }
.content-card.highlight { background: var(--brand-soft); border-color: #c7ddfa; }
.content-card h3 { margin-bottom: 13px; }
.content-card p + p { margin-top: 12px; }
.prose-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.prose-panel { padding: 36px; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--border); }
.prose-panel h2 { font-size: 30px; margin-bottom: 18px; }
.prose-panel p + p { margin-top: 14px; }
.comparison { width: 100%; border-collapse: collapse; border-radius: 18px; overflow: hidden; border: 1px solid var(--border); }
.comparison th, .comparison td { padding: 16px 18px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
.comparison th { background: var(--brand-soft); color: var(--text); }
.comparison td { color: var(--body); background: #fff; }
.comparison tr:last-child td { border-bottom: 0; }
.notice { padding: 25px 28px; border-radius: 18px; background: #fff8e7; border: 1px solid #f3d99a; color: #5b4a24; }
.notice h3 { margin-bottom: 10px; }
.site-footer { padding: 72px 0 22px; background: var(--footer); color: #fff; }
.footer-grid { width: var(--container); margin: 0 auto; display: grid; grid-template-columns: 1.55fr repeat(3, 1fr); gap: 50px; }
.footer-brand p { margin-top: 18px; max-width: 390px; color: rgba(255,255,255,.68); }
.footer-download { margin-top: 24px; }
.footer-grid h2 { margin-bottom: 18px; font-size: 16px; }
.footer-grid > div:not(.footer-brand) a { display: block; padding: 6px 0; color: rgba(255,255,255,.68); font-size: 14px; }
.footer-grid a:hover { color: #fff; }
.footer-bottom { width: var(--container); margin: 50px auto 0; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); display: flex; justify-content: space-between; gap: 24px; align-items: center; }
.footer-bottom p, .footer-bottom a { color: rgba(255,255,255,.55); font-size: 13px; }
.footer-bottom nav { display: flex; flex-wrap: wrap; gap: 18px; }
@media (max-width: 1120px) {
  .desktop-nav { display: none; }
  .header-inner { height: 72px; }
  .header-actions { margin-left: auto; }
  .hero-grid, .page-hero-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .steps { grid-template-columns: repeat(3, 1fr); gap: 36px 0; }
  .step:nth-child(3)::after, .step:nth-child(6)::after { display: none; }
}
@media (max-width: 900px) {
  :root { --container: min(100% - 30px, 760px); }
  .section { padding: 74px 0; }
  .hero-grid, .page-hero-grid, .feature-panel, .hardware-grid, .swap-grid, .security-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 56px; }
  .hero-visual { min-height: 430px; }
  .capability-bar { grid-template-columns: repeat(2, 1fr); }
  .capability:nth-child(2) { border-right: 0; }
  .capability:nth-child(-n+2) { border-bottom: 1px solid var(--border); }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .category-card.featured, .category-card.wide { grid-column: span 1; }
  .feature-panel { padding: 34px; }
  .feature-panel .image-panel { min-height: 360px; }
  .split-offset, .topic-grid, .ecosystem-grid, .prose-grid { grid-template-columns: 1fr; }
  .offset-panel:nth-child(2) { margin-top: 0; }
  .topic-panel .topic-copy { max-width: 65%; }
  .content-grid { grid-template-columns: repeat(2, 1fr); }
  .review-strip { grid-template-columns: 1fr 1fr; }
  .review:nth-child(even) { transform: none; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-grid > div:last-child { grid-column: 2 / 4; }
}
@media (max-width: 620px) {
  :root { --container: calc(100% - 24px); }
  .header-inner { gap: 8px; }
  .brand img { width: 126px; }
  .header-download { min-height: 44px; padding: 9px 13px; font-size: 13px; }
  .menu-toggle { width: 44px; height: 44px; }
  .section { padding: 62px 0; }
  .section-sm { padding: 48px 0; }
  h1 { font-size: 40px; }
  h2 { font-size: 32px; }
  .hero-grid { gap: 14px; }
  .hero-visual { min-height: 360px; }
  .hero-visual > img { max-height: 350px; }
  .float-note { position: static; max-width: none; }
  .hero-visual { grid-template-columns: 1fr 1fr; gap: 10px; align-content: end; }
  .hero-visual > img { grid-column: 1 / 3; }
  .float-note.three { grid-column: 1 / 3; }
  .capability-bar { grid-template-columns: 1fr; }
  .capability { border-right: 0; border-bottom: 1px solid var(--border); }
  .capability:last-child { border-bottom: 0; }
  .category-grid, .content-grid, .review-strip { grid-template-columns: 1fr; }
  .category-card { min-height: auto; }
  .feature-panel { padding: 24px; gap: 32px; }
  .feature-panel .image-panel, .product-image { min-height: 310px; }
  .check-list { grid-template-columns: 1fr; }
  .offset-panel, .topic-panel, .ecosystem-card, .prose-panel { padding: 26px; }
  .topic-panel { min-height: 460px; }
  .topic-panel .topic-copy { max-width: 100%; }
  .topic-panel img { width: 76%; opacity: .32; }
  .security-notes { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 0; }
  .step { padding: 0 0 34px 72px; }
  .step-number { position: absolute; left: 0; top: 0; }
  .step:not(:last-child)::after { left: 23px; top: 54px; right: auto; width: 2px; height: calc(100% - 48px); }
  .timeline::before { left: 13px; }
  .timeline-item { grid-template-columns: 1fr; gap: 7px; padding-left: 38px; }
  .timeline-content::before { left: -31px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px 22px; }
  .footer-brand { grid-column: 1 / 3; }
  .footer-grid > div:last-child { grid-column: auto; }
  .footer-bottom { align-items: flex-start; flex-direction: column; }
  .comparison { display: block; overflow-x: auto; white-space: nowrap; }
}
@media (max-width: 380px) {
  .brand img { width: 112px; }
  .header-download { padding: 8px 10px; }
}