/* The source thread and device scenes are scoped to the two marketing sections. */
.continuity {
  --continuity-paper: var(--surface-accent-4);
  --continuity-sheet: var(--color-card);
  --continuity-ink: var(--color-foreground);
  --continuity-muted: var(--color-muted-foreground);
  --continuity-rule: var(--color-border);
  --continuity-trace: var(--color-accent);
  --continuity-action: var(--color-primary);
  --continuity-display: clamp(2.25rem, 4.2vw, 3.75rem);
  color: var(--continuity-ink);
  background: var(--continuity-paper);
  font-size: 1rem;
  line-height: 1.65;
  padding: 96px 0;
  scroll-margin-top: 32px;
}
.continuity *, .continuity *::before, .continuity *::after { min-width: 0; }
.continuity-container { width: min(calc(100% - 80px), 1280px); margin-inline: auto; }
.continuity-intro { display: grid; grid-template-columns: 1.4fr 1fr; align-items: end; gap: 64px; margin-bottom: 56px; }
.continuity-eyebrow { font-size: .875rem; letter-spacing: .1em; font-weight: 600; color: var(--continuity-action); margin-bottom: 24px; }
.continuity h2 { font-size: var(--continuity-display); line-height: 1.16; letter-spacing: -.045em; font-weight: 600; text-wrap: initial; }
.continuity h2 span { color: var(--continuity-muted); }
.continuity h2:lang(zh) { letter-spacing: -.025em; line-height: 1.35; }
.continuity-lead { max-width: 400px; justify-self: end; color: var(--continuity-muted); font-size: 1.0625rem; line-height: 1.8; padding-bottom: 4px; }
.continuity-meta { font-size: .75rem; line-height: 1.6; color: var(--continuity-muted); }
.continuity-mono, .continuity-timestamp { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.continuity-link { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; color: var(--continuity-action); font-size: .875rem; font-weight: 600; text-decoration: underline; }
.continuity-link svg, .continuity-timestamp svg { width: 16px; height: 16px; flex-shrink: 0; }
.continuity a, .continuity summary { touch-action: manipulation; }
.continuity a:focus-visible, .continuity summary:focus-visible { outline: 3px solid var(--continuity-action); outline-offset: 4px; }
.continuity a:active, .continuity summary:active { opacity: .8; }
.continuity a, .continuity summary { transition: opacity var(--motion-press) var(--ease-standard); }
.continuity-folio { position: relative; background: var(--continuity-sheet); border: 1px solid var(--continuity-rule); box-shadow: var(--elevation-2); }
.continuity-folio::before { content: ''; position: absolute; top: -1px; left: 0; width: 64px; height: 3px; background: var(--continuity-trace); }
.continuity-folio-header { padding: 32px 48px; border-bottom: 1px solid var(--continuity-rule); }
.continuity-folio-header > .continuity-meta { letter-spacing: .08em; margin-bottom: 20px; }
.continuity-folio-header > div { display: flex; align-items: end; justify-content: space-between; gap: 24px; }
.continuity-folio-header h3 { font-size: 1.5rem; line-height: 1.4; font-weight: 600; letter-spacing: -.025em; }
.continuity-folio-header > div > p { display: flex; flex-direction: column; font-size: .875rem; color: var(--continuity-muted); }
.continuity-folio-header strong { color: var(--continuity-ink); }
.continuity-folio-body { display: grid; grid-template-columns: 240px minmax(0, 1fr); padding: 0 48px; }
.continuity-margin { padding: 48px 48px 40px 0; font-size: .875rem; }
.continuity-margin > .continuity-meta { margin-bottom: 12px; }
.continuity-integrations { margin-top: 20px; font-weight: 600; line-height: 2; }
.continuity-margin-foot { margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--continuity-rule); color: var(--continuity-muted); }
.continuity-thread { border-left: 2px solid var(--continuity-trace); }
.continuity-entry { position: relative; padding: 44px 0 36px 48px; }
.continuity-entry + .continuity-entry { border-top: 1px solid var(--continuity-rule); }
.continuity-node { position: absolute; top: 44px; left: -17px; display: grid; place-items: center; width: 32px; height: 32px; border: 1px solid var(--continuity-action); background: var(--continuity-sheet); color: var(--continuity-action); border-radius: 50%; font: 12px var(--font-mono); }
.continuity-entry-heading { margin-bottom: 24px; }
.continuity-entry-heading > .continuity-meta { letter-spacing: .06em; }
.continuity-entry h4 { margin: 4px 0 0; font-size: 1.125rem; font-weight: 600; line-height: 1.4; }
.continuity-source-line { display: grid; grid-template-columns: 80px minmax(0, 1fr); gap: 20px; }
.continuity-timestamp { display: inline-flex; align-items: center; align-self: start; gap: 8px; min-height: 44px; font-size: .875rem; color: var(--continuity-action); }
.continuity blockquote { margin: 8px 0 0; font-size: 1.125rem; line-height: 1.75; }
.continuity-translation-label { margin-top: 20px; }
.continuity-translation { margin-top: 8px; font-size: 1.125rem; line-height: 1.8; }
.continuity-note-text { max-width: 640px; font-size: clamp(1.25rem, 2.1vw, 1.75rem); line-height: 1.65; letter-spacing: -.02em; }
.continuity-note-footer { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px 24px; margin-top: 20px; }
.continuity-question { max-width: 540px; font-size: clamp(1.5rem, 2.4vw, 2rem); line-height: 1.45; font-weight: 600; letter-spacing: -.025em; }
.continuity-answer { max-width: 540px; margin-top: 24px; }
.continuity-answer summary { cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 48px; padding: 12px 16px; background: var(--color-action); color: var(--color-on-action); font-size: .875rem; font-weight: 600; list-style: none; border-radius: var(--radius-sm); }
.continuity-answer summary::-webkit-details-marker { display: none; }
.continuity-answer summary::marker { content: ''; }
.continuity-answer-icon { font-size: 1.25rem; line-height: 1; }
.continuity-hide, .continuity-answer[open] .continuity-show { display: none; }
.continuity-answer[open] .continuity-hide { display: inline; }
.continuity-answer[open] .continuity-answer-icon { transform: rotate(45deg); }
.continuity-answer-body { padding: 20px 16px; border: 1px solid var(--continuity-rule); border-top: 0; background: var(--color-muted); }
.continuity-answer-body > p + p { margin-top: 8px; }
.continuity-illustrative { margin-top: 12px; color: var(--continuity-muted); font-size: .75rem; line-height: 1.6; }
.continuity-folio-footer { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 20px 48px; border-top: 1px solid var(--continuity-rule); color: var(--continuity-muted); font-size: .875rem; }
.continuity-folio-footer > .continuity-mono { font-size: .75rem; }
/* One generous desktop workspace, with a closer view of mobile review. */
.continuity-platforms { padding-top: 32px; background: var(--continuity-paper); }
.continuity-platform-intro { border-top: 1px solid var(--continuity-rule); padding-top: 80px; }
.continuity-device-scene { display: grid; grid-template-columns: minmax(0, 1fr) 320px; align-items: start; }
.continuity figure { margin: 0; }
.continuity-desktop { grid-column: 1 / -1; grid-row: 1; margin-right: 240px !important; }
.continuity-device-caption { display: flex; flex-direction: column; gap: 4px; margin-bottom: 20px; }
.continuity-device-caption strong { font-size: 1.25rem; font-weight: 600; }
.continuity-device-caption span { font-size: .875rem; color: var(--continuity-muted); }
.continuity-desktop-window { background: var(--continuity-sheet); border: 1px solid var(--continuity-rule); border-radius: var(--radius-md); box-shadow: var(--elevation-2); }
.continuity-window-bar { display: flex; align-items: center; gap: 16px; min-height: 44px; padding: 8px 20px; border-bottom: 1px solid var(--continuity-rule); font-size: .875rem; }
.continuity-window-bar > .continuity-meta { margin-left: auto; }
.continuity-window-dots { display: flex; gap: 6px; }
.continuity-window-dots i { display: block; width: 8px; height: 8px; border: 1px solid var(--continuity-muted); border-radius: 50%; }
.continuity-workspace { display: grid; grid-template-columns: 184px minmax(0, 1fr); }
.continuity-library { display: flex; flex-direction: column; gap: 16px; padding: 24px 16px; border-right: 1px solid var(--continuity-rule); background: var(--surface-accent-4); font-size: .875rem; border-radius: 0 0 0 var(--radius-md); }
.continuity-library > p { font-weight: 600; font-size: 1rem; margin-bottom: 16px; }
.continuity-library > span:not(.continuity-meta) { color: var(--continuity-muted); }
.continuity-selected-course { padding: 8px 12px; margin-inline: -8px; border-left: 2px solid var(--continuity-trace); background: var(--surface-accent-8); }
.continuity-library-bottom { margin-top: auto; padding-top: 64px; display: flex; flex-direction: column; gap: 12px; color: var(--continuity-muted); }
.continuity-library-bottom strong { color: var(--continuity-action); }
.continuity-desktop-note { padding: 0 112px 32px 32px; }
.continuity-note-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; min-height: 60px; border-bottom: 1px solid var(--continuity-rule); margin-bottom: 28px; font-size: .875rem; }
.continuity-note-toolbar > span:first-child { border-bottom: 2px solid var(--continuity-trace); padding-block: 18px; }
.continuity-desktop-note h3 { margin-top: 12px; font-size: 1.5rem; font-weight: 600; line-height: 1.4; }
.continuity-provenance { margin-top: 12px; font-size: .75rem; color: var(--continuity-muted); }
.continuity-desktop-note-text { margin-top: 24px; font-size: 1.125rem; line-height: 1.8; }
.continuity-desktop-source { margin-top: 28px; padding: 20px 0 0 20px; border-top: 1px solid var(--continuity-rule); border-left: 2px solid var(--continuity-trace); }
.continuity-desktop-source blockquote { font-size: 1rem; line-height: 1.75; }
.continuity-desktop-source .continuity-link { margin-top: 12px; }
.continuity-mobile { grid-column: 2; grid-row: 1; margin-top: 180px !important; position: relative; z-index: 1; }
.continuity-mobile > .continuity-device-caption { padding-left: 24px; }
.continuity-phone { background: var(--continuity-sheet); border: 6px solid var(--continuity-ink); border-radius: 36px; padding: 16px 0 12px; box-shadow: var(--elevation-3); }
.continuity-phone-top { width: 48px; height: 5px; border-radius: 4px; background: var(--continuity-ink); margin: 0 auto 24px; }
.continuity-phone-content { padding: 0 24px; }
.continuity-decks-title { margin-bottom: 24px; font-weight: 600; font-size: 1.25rem; }
.continuity-phone h3 { font-size: 1rem; font-weight: 700; }
.continuity-phone h3 + p { color: var(--continuity-muted); font-size: .875rem; margin-top: 4px; }
.continuity-card-position { padding-top: 24px; margin-top: 24px; border-top: 1px solid var(--continuity-rule); }
.continuity-prompt-label { font-size: .875rem; font-weight: 600; margin-top: 16px; color: var(--continuity-muted); }
.continuity-mobile-question { font-size: 1.125rem; line-height: 1.65; margin-top: 8px; }
.continuity-phone .continuity-answer { margin-top: 24px; }
.continuity-home-indicator { width: 72px; height: 4px; background: var(--continuity-ink); border-radius: 4px; margin: 28px auto 0; }
.continuity-mobile > .continuity-illustrative { padding-inline: 12px; }
.continuity-sync { display: flex; align-items: start; gap: 20px; padding: 24px 0; margin-top: 48px; border-block: 1px solid var(--continuity-rule); }
.continuity-sync-mark { flex: 0 0 28px; font-size: 2rem; color: var(--continuity-action); line-height: 1.2; }
.continuity-sync-mark svg { display: block; width: 28px; height: 28px; }
.continuity-sync h3 { font-size: 1rem; font-weight: 600; line-height: 1.6; }
.continuity-sync p { margin-top: 4px; color: var(--continuity-muted); font-size: .875rem; }
.continuity-platform-footer { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 24px; }
.continuity-platform-footer > p { font-size: .875rem; color: var(--continuity-muted); }
.continuity [id^="platform-panel-"] { scroll-margin-top: 32px; }
@media (max-width: 1100px) {
  .continuity-intro { grid-template-columns: 1.3fr 1fr; gap: 40px; }
  .continuity-folio-body { grid-template-columns: 180px minmax(0, 1fr); padding-inline: 32px; }
  .continuity-margin { padding-right: 32px; }
  .continuity-entry { padding-left: 32px; }
  .continuity-source-line { grid-template-columns: 1fr; gap: 8px; }
  .continuity-folio-header, .continuity-folio-footer { padding-inline: 32px; }
  .continuity-desktop { margin-right: 0 !important; }
  .continuity-desktop-note { padding-right: 32px; }
  .continuity-mobile { grid-row: 2; margin-top: 32px !important; }
  .continuity-device-scene { grid-template-columns: minmax(0, 1fr) 320px; }
  .continuity-mobile::before { content: ''; position: absolute; right: calc(100% + 32px); top: 52px; width: min(160px, 16vw); height: 64px; border-bottom: 1px solid var(--continuity-trace); border-left: 1px solid var(--continuity-trace); }
}
@media (max-width: 760px) {
  .continuity { padding-block: 64px; }
  .continuity-container { width: calc(100% - 40px); }
  .continuity-intro { grid-template-columns: 1fr; gap: 24px; margin-bottom: 32px; }
  .continuity-lead { justify-self: start; max-width: 560px; font-size: 1rem; }
  .continuity-eyebrow { font-size: .875rem; margin-bottom: 16px; letter-spacing: .06em; }
  .continuity-folio-header { padding: 24px; }
  .continuity-folio-header > div { display: block; }
  .continuity-folio-header > div > p { margin-top: 16px; }
  .continuity-folio-body { display: flex; flex-direction: column; padding: 0 24px; }
  .continuity-margin { padding: 24px 0; border-bottom: 1px solid var(--continuity-rule); }
  .continuity-integrations { margin-top: 8px; }
  .continuity-margin-foot { border: 0; margin-top: 8px; padding-top: 0; }
  .continuity-thread { margin-left: 0; }
  .continuity-entry { padding: 32px 0 28px 24px; }
  .continuity-node { top: 32px; left: -14px; width: 26px; height: 26px; }
  .continuity-entry-heading { margin-bottom: 16px; }
  .continuity blockquote, .continuity-translation { font-size: 1rem; }
  .continuity-note-text { font-size: 1.25rem; }
  .continuity-question { font-size: 1.5rem; }
  .continuity-folio-footer { padding: 20px 24px; }
  .continuity-platforms { padding-top: 0; }
  .continuity-platform-intro { padding-top: 56px; }
  .continuity-device-scene { grid-template-columns: 1fr; gap: 32px; }
  .continuity-desktop, .continuity-mobile { grid-column: 1; }
  .continuity-workspace { grid-template-columns: 1fr; }
  .continuity-library { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 8px 12px; border-right: 0; border-bottom: 1px solid var(--continuity-rule); border-radius: 0; padding: 16px 20px; }
  .continuity-library > p, .continuity-library > .continuity-meta, .continuity-library-bottom { display: none; }
  .continuity-selected-course { margin: 0; padding: 8px; }
  .continuity-library > span:last-of-type { font-size: .875rem; }
  .continuity-desktop-note { padding: 0 20px 24px; }
  .continuity-desktop-note h3 { font-size: 1.375rem; }
  .continuity-desktop-note-text { font-size: 1rem; }
  .continuity-window-bar { padding-inline: 16px; gap: 12px; }
  .continuity-window-dots { display: none; }
  .continuity-desktop-source { padding-left: 16px; }
  .continuity-mobile { justify-self: center; width: min(100%, 350px); margin-top: 8px !important; }
  .continuity-mobile::before { display: none; }
  .continuity-mobile > .continuity-device-caption { padding-left: 0; }
  .continuity-sync { margin-top: 32px; gap: 12px; }
  .continuity-platform-footer { display: block; }
  .continuity-platform-footer .continuity-link { margin-top: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  .continuity a, .continuity summary { transition: none; }
}

/* Second visual pass: an editorial stage beside one unfolding source record. */
.continuity-chain { background: var(--color-on-accent); padding-block: 104px; }
.continuity-chain > .continuity-container { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.8fr); align-items: start; gap: 64px; }
.continuity-chain .continuity-intro { display: block; position: sticky; top: 64px; margin: 0; }
.continuity-chain .continuity-intro h2 { color: var(--color-card); font-size: clamp(2.75rem, 3.5vw, 3.25rem); line-height: 1.2; }
.continuity-chain .continuity-intro h2 span, .continuity-chain .continuity-lead { color: color-mix(in srgb, var(--color-card) 76%, var(--color-on-accent)); }
.continuity-chain .continuity-eyebrow { color: var(--color-accent); font-size: .75rem; }
.continuity-chain .continuity-lead { margin-top: 32px; max-width: 290px; }
.continuity-folio { box-shadow: 0 28px 70px color-mix(in srgb, var(--color-on-accent) 24%, transparent); }
.continuity-folio-header { padding: 28px 32px; }
.continuity-folio-header > div { display: block; }
.continuity-folio-header > div > p { margin-top: 12px; flex-direction: row; gap: 16px; flex-wrap: wrap; }
.continuity-folio-body { display: block; padding: 0 32px; }
.continuity-margin { display: flex; align-items: baseline; flex-wrap: wrap; gap: 8px 16px; padding: 20px 0; border-bottom: 1px solid var(--continuity-rule); }
.continuity-margin > .continuity-meta { display: none; }
.continuity-integrations { margin: 0; }
.continuity-entry { padding: 28px 0 28px 32px; }
.continuity-node { top: 28px; }
.continuity-entry-heading { margin-bottom: 16px; }
.continuity-source-line { grid-template-columns: 1fr; gap: 4px; }
.continuity-note-text { font-size: 1.5rem; }
.continuity-question { font-size: 1.75rem; }
.continuity-folio-footer { padding-inline: 32px; }
.continuity-platforms { padding-top: 96px; }
.continuity-platform-intro { border: 0; padding-top: 0; }
.continuity-preview { font-size: .75rem; color: var(--continuity-muted); margin: -24px 0 32px; }
.continuity-device-scene { position: relative; }
.continuity-desktop-source { position: relative; }
.continuity-desktop-source::after { content: ''; position: absolute; left: 100%; top: 50%; width: 100px; height: 1px; background: var(--continuity-trace); }
.continuity-sync { max-width: 840px; }
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) and (min-width: 761px) {
    .continuity-folio { view-timeline: --continuity-record block; }
    .continuity-thread { position: relative; border-color: color-mix(in srgb, var(--continuity-trace) 30%, var(--continuity-sheet)); }
    .continuity-thread::before {
      content: ''; position: absolute; top: 0; bottom: 0; left: -2px; width: 2px;
      background: var(--continuity-trace); transform-origin: top;
      animation: continuity-carry linear both; animation-timeline: --continuity-record;
      animation-range: entry 30% exit 65%;
    }
  }
}
@keyframes continuity-carry { from { transform: scaleY(0); } to { transform: scaleY(1); } }
@media (min-width: 761px) and (max-width: 1100px) {
  .continuity-chain > .continuity-container { grid-template-columns: 1fr; gap: 40px; }
  .continuity-chain .continuity-intro { position: static; display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; }
  .continuity-chain .continuity-lead { margin: 0; max-width: 400px; }
  .continuity-desktop { margin-right: 144px !important; }
  .continuity-workspace { grid-template-columns: 132px minmax(0, 1fr); }
  .continuity-desktop-note { padding-right: 144px; padding-left: 24px; }
  .continuity-device-scene { grid-template-columns: minmax(0, 1fr) 272px; }
  .continuity-mobile { grid-row: 1; margin-top: 230px !important; }
  .continuity-mobile::before { display: none; }
  .continuity-phone-content { padding-inline: 18px; }
  .continuity-desktop-source::after { width: 148px; }
}
@media (max-width: 760px) {
  .continuity-chain { padding-block: 64px; }
  .continuity-chain > .continuity-container { display: block; }
  .continuity-chain .continuity-intro { position: static; margin-bottom: 32px; }
  .continuity-chain .continuity-intro h2 { font-size: 2.25rem; }
  .continuity-chain .continuity-lead { margin-top: 24px; max-width: 100%; }
  .continuity-folio-header { padding: 24px 20px; }
  .continuity-folio-body { padding-inline: 20px; }
  .continuity-entry { padding-left: 24px; }
  .continuity-node { top: 28px; }
  .continuity-note-text { font-size: 1.25rem; }
  .continuity-question { font-size: 1.5rem; }
  .continuity-folio-footer { padding-inline: 20px; }
  .continuity-platforms { padding-top: 64px; }
  .continuity-preview { margin: -8px 0 28px; }
  .continuity-desktop-source::after { display: none; }
  .continuity-mobile::before { display: block; left: 28px; top: -40px; width: 1px; height: 32px; border: 0; background: var(--continuity-trace); }
}