:root {
  color-scheme: light;
  --ink: #202c34;
  --text: #50616c;
  --muted: #6a7b84;
  --line: #e3e9ec;
  --tint: #f6f8fa;
  --teal: #087f83;
  --teal-dark: #066468;
  --teal-soft: #edf6f5;
  --width: 1200px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body { margin: 0; background: #fff; color: var(--ink); font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif; font-size: 16px; line-height: 1.65; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
img { display: block; max-width: 100%; }
h1,h2,h3,p,figure,dl,dd { margin: 0; }
h1,h2,h3 { font-weight: 650; color: var(--ink); }
h1,h2 { text-wrap: balance; }
a,button { -webkit-tap-highlight-color: transparent; }
a:focus-visible,button:focus-visible { outline: 3px solid #138d96; outline-offset: 5px; }
.container { width: min(var(--width), calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: fixed; top: -100px; left: 16px; padding: 12px 20px; z-index: 200; color: #fff; background: var(--teal); }
.skip-link:focus { top: 12px; }
.site-header { position: sticky; top: 0; z-index: 100; border-bottom: 1px solid var(--line); background: #fff; }
.header-inner { min-height: 80px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; font-size: 23px; font-weight: 700; line-height: 1.25; }
.brand img { width: 42px; height: 42px; object-fit: cover; border-radius: 8px; }
.brand small { display: block; margin-top: 5px; color: var(--muted); font-size: 12px; font-weight: 400; letter-spacing: .04em; }
nav { display: flex; align-items: center; gap: 32px; }
nav a { padding: 26px 0; color: #485b66; font-size: 14px; white-space: nowrap; border-bottom: 2px solid transparent; }
nav a:hover,nav a:focus-visible { color: var(--teal); border-bottom-color: var(--teal); }
.header-link { display: inline-flex; align-items: center; gap: 16px; font-size: 14px; color: var(--teal); font-weight: 600; white-space: nowrap; }
.nav-toggle { display: none; }
.hero { background: #fff; }
.hero-layout { display: grid; grid-template-columns: minmax(0,1fr) 300px; align-items: center; gap: 88px; padding-top: 48px; padding-bottom: 42px; }
.eyebrow { margin-bottom: 12px; color: var(--teal); font-size: 14px; font-weight: 600; letter-spacing: .035em; }
h1 { font-size: clamp(2.25rem,3.7vw,3.25rem); line-height: 1.35; letter-spacing: -.035em; }
.hero-description { max-width: 590px; margin-top: 20px; color: var(--text); font-size: 17px; line-height: 1.85; }
.hero-actions { display: flex; gap: 12px; margin-top: 26px; }
.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; gap: 22px; padding: 10px 22px; border: 1px solid transparent; border-radius: 6px; font-size: 15px; font-weight: 600; }
.button-primary { background: var(--teal); color: #fff; }
.button-primary:hover { background: var(--teal-dark); }
.button-secondary { background: #fff; color: var(--ink); border-color: #cfd9de; }
.button-secondary:hover { border-color: var(--teal); color: var(--teal); }
.brand-visual { width: 300px; justify-self: end; }
.brand-visual img { width: 100%; height: auto; border-radius: 12px; }
.facts { display: grid; grid-template-columns: 1fr 1fr 1.4fr; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 24px 0; }
.facts > div { padding-inline: 30px; border-left: 1px solid var(--line); }
.facts > div:first-child { border-left: 0; padding-left: 0; }
.facts dt { color: var(--text); font-size: 14px; margin-bottom: 6px; }
.facts dd { font-size: 14px; color: var(--text); line-height: 1.5; }
.facts strong { font-size: 26px; letter-spacing: -.025em; color: var(--ink); font-weight: 650; }
.facts div:last-child strong { font-size: 23px; }
.facts dd > span { display: block; margin-top: 3px; color: var(--muted); font-size: 12px; }
.section { padding: 66px 0; }
.section-tinted { background: var(--tint); border-top: 1px solid #edf0f2; border-bottom: 1px solid #edf0f2; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.section-heading .eyebrow { margin-bottom: 7px; }
h2 { font-size: 30px; line-height: 1.45; letter-spacing: -.025em; }
.section-heading > div { flex: 0 1 auto; min-width: 0; }
.section-heading > p { max-width: 410px; color: var(--text); line-height: 1.75; padding-bottom: 3px; }
.payment-layout { display: grid; grid-template-columns: 320px minmax(0,1fr); gap: 24px; }
.payment-overview { padding: 28px; border-radius: 10px; border: 1px solid #d4e7e5; background: var(--teal-soft); display: flex; flex-direction: column; }
.product-label { display: inline-block; width: max-content; padding: 3px 9px; border: 1px solid #b9d8d5; border-radius: 4px; color: var(--teal-dark); font-size: 12px; font-weight: 600; }
.payment-overview h3 { margin-top: 17px; font-size: 23px; line-height: 1.55; letter-spacing: -.02em; }
.payment-overview > p { margin-top: 14px; color: #486862; font-size: 16px; line-height: 1.8; }
.overview-list { list-style: none; padding: 0; margin: 25px 0 0; }
.overview-list li { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px solid #d1e4e1; font-size: 14px; }
.overview-list li > span:last-child { color: var(--teal-dark); }
.payment-overview > .overview-note { margin-top: auto; padding-top: 20px; font-size: 12px; color: #5c7671; line-height: 1.75; }
.feature-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; }
.feature { position: relative; padding: 20px 24px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.feature-number { position: absolute; top: 21px; right: 20px; color: #8b9a9f; font-size: 12px; font-variant-numeric: tabular-nums; }
.feature h3 { font-size: 17px; margin-bottom: 8px; padding-right: 26px; }
.feature p { color: var(--text); font-size: 16px; line-height: 1.75; }
.footnote { margin-top: 18px; color: var(--muted); font-size: 12px; line-height: 1.85; }
.product-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; }
.product-card { padding: 24px; display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line); border-radius: 10px; }
.product-card-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 17px; }
.product-icon { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 8px; background: var(--teal-soft); color: var(--teal); font-size: 18px; font-weight: 600; }
.category { color: var(--muted); font-size: 12px; }
.product-card h3 { font-size: 20px; line-height: 1.55; margin-bottom: 9px; }
.product-card > p { font-size: 16px; line-height: 1.8; color: var(--text); margin-bottom: 20px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: auto 0 0; }
.tags li { font-size: 12px; line-height: 1.5; color: #5a6b74; padding: 4px 8px; background: #f4f6f8; border-radius: 4px; }
.service-table { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.service-row { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1.8fr) minmax(160px,.7fr); align-items: center; gap: 28px; padding: 23px 28px; border-top: 1px solid var(--line); }
.service-table-head { padding-block: 12px; border-top: 0; background: var(--tint); color: var(--muted); font-size: 13px; }
.service-row h3 { font-size: 16px; line-height: 1.7; }
.service-row p { font-size: 16px; color: var(--text); line-height: 1.7; }
.service-duration { color: var(--muted); font-size: 13px; white-space: nowrap; }
.service-duration strong { color: var(--teal); font-size: 23px; font-weight: 650; margin-right: 5px; }
.custom-layout { display: grid; grid-template-columns: .95fr 1.15fr; gap: 88px; align-items: center; }
.custom-copy > p:not(.eyebrow) { max-width: 450px; margin-top: 15px; color: var(--text); font-size: 16px; line-height: 1.85; }
.support { margin-top: 24px; display: flex; align-items: center; flex-wrap: wrap; gap: 13px; }
.support strong { color: var(--teal); font-size: 28px; }
.support span { color: var(--text); font-size: 14px; }
.delivery-flow { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 28px; padding: 0; margin: 0; }
.delivery-flow li { display: flex; gap: 12px; align-items: flex-start; }
.delivery-flow li > span { display: grid; place-items: center; width: 28px; height: 28px; flex-shrink: 0; color: var(--teal); background: #e6efef; border-radius: 50%; font-size: 12px; font-weight: 600; }
.delivery-flow h3 { margin-bottom: 6px; font-size: 16px; line-height: 1.7; }
.delivery-flow p { color: var(--text); font-size: 14px; line-height: 1.75; }
footer { padding-top: 34px; background: #fff; }
.footer-main { display: flex; align-items: flex-start; justify-content: space-between; gap: 28px; padding-bottom: 26px; }
.footer-brand { font-size: 22px; }
.footer-main p { color: var(--muted); font-size: 14px; margin-top: 8px; }
.footer-contact strong { font-size: 14px; font-weight: 600; }
.back-top { font-size: 14px; color: var(--text); }
.footer-bottom { padding-block: 17px; display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }

@media (max-width: 1080px) {
  .header-link { display: none; }
  .hero-layout { gap: 45px; grid-template-columns: minmax(0,1fr) 270px; }
  .brand-visual { width: 270px; }
  .payment-layout { grid-template-columns: 280px minmax(0,1fr); gap: 18px; }
  .payment-overview { padding: 22px; }
  .feature { padding: 18px; }
  .product-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .custom-layout { gap: 40px; }
  .service-row { gap: 20px; padding-inline: 22px; grid-template-columns: minmax(0,1.1fr) minmax(0,1.6fr) minmax(140px,.7fr); }
}
@media (max-width: 800px) {
  .container { width: calc(100% - 40px); }
  .header-inner { min-height: 70px; gap: 20px; }
  nav { gap: 21px; }
  nav a { font-size: 14px; padding-block: 21px; }
  .brand small { display: none; }
  .hero-layout { gap: 30px; grid-template-columns: minmax(0,1fr) 220px; padding-top: 35px; padding-bottom: 35px; }
  .brand-visual { width: 220px; }
  h1 { font-size: 36px; }
  .hero-description { font-size: 16px; }
  .hero-actions { gap: 8px; }
  .button { padding-inline: 16px; font-size: 14px; gap: 12px; }
  .facts > div { padding-inline: 20px; }
  .facts strong,.facts div:last-child strong { font-size: 21px; }
  .section { padding: 48px 0; }
  .section-heading { flex-direction: column; align-items: flex-start; gap: 10px; }
  .section-heading > p { max-width: none; }
  h2 { font-size: 28px; }
  .payment-layout { grid-template-columns: 1fr; }
  .payment-overview h3 br { display: none; }
  .payment-overview { display: block; padding: 24px; }
  .overview-list { display: flex; gap: 24px; margin-top: 18px; }
  .overview-list li { flex: 1; flex-wrap: wrap; }
  .payment-overview > .overview-note { padding-top: 0; }
  .custom-layout { grid-template-columns: 1fr; gap: 30px; }
  .custom-copy > p:not(.eyebrow) { max-width: 600px; }
  .service-row { grid-template-columns: 1.2fr 1.6fr .85fr; gap: 15px; padding: 20px 18px; }
  .service-table-head { padding-block: 12px; }
  .service-duration { white-space: normal; }
  .service-duration strong { display: block; }
}
@media (max-width: 620px) {
  html { scroll-padding-top: 84px; }
  .container { width: calc(100% - 32px); }
  .header-inner { min-height: 66px; flex-wrap: wrap; gap: 0; }
  .brand { font-size: 21px; }
  .brand img { width: 36px; height: 36px; }
  .nav-toggle { display: flex; width: 44px; height: 44px; align-items: center; justify-content: center; flex-direction: column; gap: 5px; border: 0; background: #fff; border-radius: 6px; }
  .nav-toggle > span { width: 21px; height: 2px; background: var(--ink); }
  nav { display: none; width: 100%; padding: 8px 0 16px; gap: 0; }
  nav.is-open { display: grid; grid-template-columns: 1fr 1fr; }
  nav a { padding: 12px 10px; border: 0; border-radius: 4px; font-size: 15px; }
  nav a:hover { background: var(--tint); }
  .hero-layout { grid-template-columns: minmax(0,1fr) 84px; gap: 16px; align-items: start; padding-top: 32px; padding-bottom: 28px; }
  .hero-copy { display: contents; }
  .hero-copy > .eyebrow { grid-column: 1; grid-row: 1; font-size: 12px; margin-bottom: -10px; }
  h1 { grid-column: 1; grid-row: 2; font-size: clamp(26px,6.2vw,36px); letter-spacing: -.045em; line-height: 1.45; }
  .brand-visual { grid-column: 2; grid-row: 1 / 3; align-self: center; width: 84px; }
  .brand-visual img { border-radius: 8px; }
  .hero-description { grid-column: 1 / -1; margin-top: 0; }
  .hero-actions { grid-column: 1 / -1; margin-top: 0; display: grid; grid-template-columns: 1fr 1fr; }
  .button { padding: 11px 10px; font-size: 14px; }
  .facts { grid-template-columns: 1fr 1fr; padding: 20px 0; row-gap: 20px; }
  .facts > div { padding-inline: 20px; }
  .facts > div:last-child { grid-column: 1 / -1; padding: 16px 0 0; border-left: 0; border-top: 1px solid var(--line); }
  .facts div:last-child dd { display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: center; }
  .facts div:last-child strong { font-size: 20px; }
  .facts dt { font-size: 13px; }
  .facts strong { font-size: 24px; }
  .section { padding: 40px 0; }
  h2 { font-size: 25px; line-height: 1.45; }
  .section-heading { margin-bottom: 22px; }
  .section-heading > p { font-size: 16px; }
  .payment-overview { padding: 20px; }
  .payment-overview h3 { font-size: 21px; }
  .overview-list { display: block; }
  .overview-list li { flex-wrap: nowrap; padding-block: 8px; }
  .feature-grid { grid-template-columns: 1fr; gap: 10px; }
  .feature { padding: 18px 20px; }
  .feature h3 { font-size: 17px; }
  .feature-number { top: 20px; }
  .product-grid { grid-template-columns: 1fr; gap: 14px; }
  .product-card { padding: 21px; }
  .product-card-head { margin-bottom: 13px; }
  .product-card h3 { font-size: 20px; }
  .product-card > p { margin-bottom: 16px; }
  .service-table { border: 0; overflow: visible; border-radius: 0; display: grid; gap: 12px; }
  .service-table-head { display: none; }
  .service-row:not(.service-table-head) { grid-template-columns: minmax(0,1fr) auto; gap: 10px 16px; padding: 20px; border: 1px solid var(--line); border-radius: 8px; }
  .service-row h3 { grid-column: 1; grid-row: 1; font-size: 16px; align-self: center; }
  .service-row p { grid-column: 1 / -1; grid-row: 2; }
  .service-duration { grid-column: 2; grid-row: 1; text-align: right; font-size: 12px; }
  .service-duration strong { font-size: 20px; }
  .custom-layout { gap: 28px; }
  .delivery-flow { grid-template-columns: 1fr; gap: 20px; }
  .delivery-flow p { font-size: 16px; }
  .support strong { font-size: 26px; }
  .footer-main { flex-wrap: wrap; gap: 22px; }
  .footer-contact { order: 3; width: 100%; }
  .footer-main p { font-size: 14px; }
  .footer-bottom { flex-wrap: wrap; gap: 4px 20px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

[hidden] { display: none !important; }
.payment-highlights { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin-top: 28px; padding-top: 26px; border-top: 1px solid #e4e9eb; }
.payment-highlights h3 { margin: 0 0 9px; font-size: 16px; }
.payment-highlights p { margin: 0; color: #5c6b72; font-size: 14px; line-height: 1.8; }
@media (max-width: 620px) { .payment-highlights { grid-template-columns: 1fr; gap: 18px; } }
.hero-subtitle { font-size: 24px; font-weight: 600; color: var(--text); margin-top: 12px; line-height: 1.55; }
.merchant-link { display: flex; justify-content: space-between; gap: 12px; color: var(--teal-dark); font-size: 14px; font-weight: 600; margin-top: 22px; padding-top: 10px; }
.payment-overview > .overview-note { padding-top: 10px; }
.demo-section { padding-top: 10px; }
.demo-shell { overflow: hidden; border: 1px solid #d7e0e5; border-radius: 12px; background: #fff; box-shadow: 0 8px 26px #24374608; }
.demo-topbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 20px; padding: 0 26px; background: #f4f7f9; border-bottom: 1px solid var(--line); }
.demo-tabs { display: flex; align-items: center; gap: 26px; }
.demo-tabs button { background: transparent; color: var(--text); border: 0; border-bottom: 3px solid transparent; padding: 19px 0 16px; cursor: pointer; font-size: 15px; font-weight: 600; }
.demo-tabs button[aria-selected="true"] { color: var(--teal); border-bottom-color: var(--teal); }
.demo-label,.demo-reference { font-size: 12px; color: var(--muted); }
.demo-panel { padding: 28px; }
.demo-intro { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-bottom: 22px; }
.demo-intro h3 { font-size: 20px; }
.demo-intro p { color: var(--muted); font-size: 14px; margin-top: 5px; }
.text-button { display: inline-block; padding: 5px 0; border: 0; background: none; color: var(--teal); cursor: pointer; font-size: 14px; white-space: nowrap; }
.text-button:hover { color: var(--teal-dark); text-decoration: underline; }
.demo-filters { display: grid; grid-template-columns: 1.8fr 1fr 1fr auto; gap: 14px; align-items: end; }
.demo-filters label { display: flex; flex-direction: column; gap: 7px; min-width: 0; color: var(--text); font-size: 14px; }
.demo-filters input,.demo-filters select { width: 100%; min-width: 0; height: 42px; background: #fff; border: 1px solid #ced9df; border-radius: 5px; color: var(--ink); padding: 9px 12px; font: inherit; }
.demo-filters input:focus-visible,.demo-filters select:focus-visible { outline: 2px solid var(--teal); outline-offset: 2px; }
.demo-filters .button { min-height: 42px; height: auto; cursor: pointer; font-size: 14px; }
.demo-summary { display: grid; grid-template-columns: repeat(3,1fr); margin-top: 23px; border: 1px solid var(--line); border-radius: 6px; padding: 16px 0; }
.demo-summary > div { padding: 0 20px; border-left: 1px solid var(--line); }
.demo-summary > div:first-child { border: 0; }
.demo-summary dt { font-size: 12px; color: var(--muted); margin-bottom: 5px; }
.demo-summary dd { font-size: 22px; font-weight: 600; color: var(--ink); font-variant-numeric: tabular-nums; }
.demo-summary dd span { font-size: 12px; font-weight: 400; }
.demo-result { font-size: 13px; color: var(--muted); margin: 18px 0 10px; }
.demo-table-wrap { width: 100%; overflow-x: auto; border: 1px solid var(--line); border-radius: 6px; }
.order-table { width: 100%; border-collapse: collapse; text-align: left; white-space: nowrap; font-size: 14px; }
.order-table th { color: #5a6b75; background: #f7f9fa; font-weight: 500; font-size: 13px; padding: 12px 17px; }
.order-table td { padding: 14px 17px; border-top: 1px solid #edf0f2; color: #3c515e; font-variant-numeric: tabular-nums; }
.order-table tbody tr:hover { background: #fbfdfd; }
.status-badge { display: inline-block; font-size: 12px; padding: 3px 9px; border-radius: 4px; line-height: 1.5; white-space: nowrap; }
.status-success { background: #e8f5ef; color: #236f4f; }
.status-pending { background: #fdf2db; color: #866019; }
.status-failed { background: #fceceb; color: #ab493d; }
.demo-empty { padding: 25px 16px; border: 1px solid var(--line); border-top: 0; text-align: center; font-size: 14px; color: var(--muted); }
.order-detail { margin-top: 18px; padding: 20px; background: var(--teal-soft); border: 1px solid #cee4e1; border-radius: 6px; }
.detail-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 12px; }
.order-detail h4 { margin: 0; font-size: 16px; }
.order-detail dl { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 16px; }
.order-detail dt { color: var(--muted); font-size: 12px; margin-bottom: 4px; }
.order-detail dd { color: var(--ink); font-size: 14px; overflow-wrap: anywhere; }
.order-detail > p { margin-top: 14px; color: #55736e; font-size: 12px; }
.flow-scenarios { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px; }
.flow-scenarios button { cursor: pointer; background: #fff; color: var(--text); border: 1px solid #d5dfe3; border-radius: 5px; font-size: 14px; padding: 9px 18px; }
.flow-scenarios button[aria-pressed="true"] { color: var(--teal); border-color: var(--teal); background: var(--teal-soft); }
.lifecycle-layout { display: grid; grid-template-columns: 1.4fr 1fr; gap: 38px; align-items: start; }
.lifecycle { list-style: none; margin: 0; padding: 0; }
.lifecycle li { display: grid; grid-template-columns: 32px minmax(0,1fr) auto; column-gap: 16px; align-items: start; position: relative; padding-bottom: 24px; }
.lifecycle li:last-child { padding-bottom: 0; }
.lifecycle li:not(:last-child)::before { content: ""; position: absolute; top: 33px; bottom: 4px; left: 15px; width: 1px; background: #d7e6e3; }
.step-number { display: grid; width: 32px; height: 32px; place-items: center; color: var(--teal); background: #e8f4f0; border-radius: 50%; font-size: 13px; }
.lifecycle h4 { margin: 0 0 3px; font-size: 15px; font-weight: 600; }
.lifecycle p { margin: 0; color: var(--text); font-size: 14px; line-height: 1.65; }
.lifecycle time { padding-top: 3px; font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.step-failed .step-number { color: #ad4b40; background: #fceceb; }
.step-muted .step-number { color: #768690; background: #f0f3f5; }
.step-muted h4,.step-muted p { color: #7b8991; }
.flow-explanation { border: 1px solid var(--line); border-radius: 7px; background: var(--tint); padding: 24px; }
.flow-explanation h4 { margin: 0 0 18px; font-size: 16px; }
.flow-explanation dl > div { display: flex; justify-content: space-between; align-items: center; gap: 14px; padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.flow-explanation dt { color: var(--muted); }
.flow-explanation dd { font-weight: 600; }
.flow-explanation > p { margin-top: 19px; color: var(--text); font-size: 14px; line-height: 1.85; }
.demo-bottom { display: flex; flex-wrap: wrap; gap: 5px 20px; justify-content: space-between; padding: 13px 28px; border-top: 1px solid var(--line); background: #fbfcfd; font-size: 12px; color: var(--muted); }
@media (max-width: 800px) {
  .hero-subtitle { font-size: 20px; }
  .demo-topbar { padding-inline: 20px; }
  .demo-panel { padding: 22px; }
  .demo-filters { grid-template-columns: 1fr 1fr; }
  .demo-filters .button { width: 100%; }
  .lifecycle-layout { gap: 24px; grid-template-columns: 1.2fr 1fr; }
  .flow-explanation { padding: 18px; }
}
@media (max-width: 620px) {
  .hero-subtitle { grid-column: 1 / -1; font-size: 19px; margin-top: -3px; }
  .hero-copy > .eyebrow { margin-bottom: 0; }
  h1 { font-size: 29px; }
  .demo-section { padding-top: 0; }
  .demo-topbar { padding: 0 16px 12px; gap: 3px; }
  .demo-tabs { gap: 22px; }
  .demo-tabs button { font-size: 14px; }
  .demo-label { font-size: 12px; }
  .demo-panel { padding: 20px 16px; }
  .demo-intro { gap: 12px; align-items: flex-start; flex-wrap: wrap; }
  .demo-intro > div { flex: 1 1 200px; }
  .demo-intro h3 { font-size: 18px; }
  .demo-filters { gap: 12px; }
  .demo-filters label:first-child { grid-column: 1 / -1; }
  .demo-filters .button { grid-column: 1 / -1; }
  .demo-summary { padding: 14px 0; }
  .demo-summary > div { padding-inline: 10px; }
  .demo-summary dd { font-size: clamp(14px,3.7vw,20px); }
  .demo-summary dt { font-size: 12px; }
  .order-table th,.order-table td { padding-inline: 14px; }
  .order-detail { padding: 16px; }
  .order-detail dl { grid-template-columns: 1fr 1fr; }
  .lifecycle-layout { grid-template-columns: 1fr; }
  .flow-scenarios { gap: 7px; }
  .flow-scenarios button { padding: 9px 12px; font-size: 13px; }
  .lifecycle li { column-gap: 12px; }
  .demo-bottom { padding-inline: 16px; }
}