:root {
  --flat-1: #fefefe;
  --flat-2: #f9f9f9;
  --flat-3: #f5f5f5;
  --canvas: var(--flat-1);
  --surface: var(--flat-2);
  --strong: var(--flat-3);
  --text1: #000;
  --text2: rgba(0, 0, 0, .65);
  --text3: rgba(0, 0, 0, .48);
  --ink: var(--text1);
  --secondary: var(--text2);
  --muted: var(--text3);
  --quiet: var(--text3);
  --neutral3: rgba(0, 0, 0, .12);
  --neutral4: rgba(0, 0, 0, .05);
  --line: var(--neutral4);
  --line-subtle: rgba(0, 0, 0, .035);
  --line-default: rgba(0, 0, 0, .10);
  --line-strong: rgba(0, 0, 0, .18);
  --junction: var(--neutral3);
  --white: #fff;
  --inverse: #000;
  --header-surface: rgba(254, 254, 254, .5);
  --radius-container: 24px;
  --radius-focus: 4px;
  --sidebar: 192px;
  --preview-height: 420px;
  color-scheme: light;
  font-family: "PingFang SC", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--canvas); }
button, input { font: inherit; }
a { color: inherit; }
[hidden] { display: none !important; }

.sidebar {
  position: fixed;
  z-index: 20;
  inset: 0 auto 0 0;
  display: flex;
  width: var(--sidebar);
  flex-direction: column;
  padding: 28px 16px 24px;
  border-right: 1px solid var(--line);
  background: var(--canvas);
}

.brand { display: flex; gap: 12px; align-items: center; color: inherit; text-decoration: none; }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 16px; line-height: 24px; font-weight: 500; }
.brand small { margin-top: 1px; color: var(--muted); font-size: 14px; line-height: 20px; }
.nav { display: grid; gap: 4px; margin-top: 42px; }
.nav-item { width: 100%; padding: 10px 0; border: 0; color: var(--secondary); background: transparent; cursor: pointer; text-align: left; }
.nav-item:hover, .nav-item.is-active { color: var(--ink); background: transparent; }
.nav-item.is-active { font-weight: 500; }

main { min-width: 0; margin-left: var(--sidebar); }
.toolbar { position: sticky; z-index: 15; top: 0; display: flex; height: 54px; min-height: 54px; align-items: center; justify-content: space-between; gap: 32px; padding: 0 36px; border-bottom: 1px solid var(--line); background: var(--header-surface); backdrop-filter: blur(10px); }
.toolbar-title { display: flex; height: 54px; align-items: center; gap: 8px; }
.toolbar-brand-mark { display: block; width: 45px; height: 30px; object-fit: contain; }
.toolbar h1 { margin: 0; font-size: 20px; line-height: 28px; font-weight: 400; }
.toolbar-actions { display: flex; align-items: center; gap: 8px; }
.search { display: flex; width: min(28vw, 300px); height: 40px; align-items: center; padding: 0; border-bottom: 1px solid var(--line-default); color: var(--quiet); background: transparent; }
.search input { width: 100%; border: 0; outline: 0; color: var(--ink); background: transparent; font-size: 14px; line-height: 20px; }
.search-status { min-width: 72px; color: var(--muted); font-size: 14px; line-height: 20px; text-align: right; white-space: nowrap; }

.empty { margin: 80px 36px; padding: 72px; border-radius: var(--radius-container); color: var(--muted); background: var(--surface); text-align: center; }
.audit-summary { display: grid; width: min(calc(100% - 32px), 1200px); grid-template-columns: repeat(3, minmax(0, 160px)) 1fr; gap: 16px; align-items: center; margin: 32px auto 0; padding: 20px 24px; border: 1px solid var(--line); background: var(--white); }
.audit-summary > div { display: grid; grid-template-columns: auto 1fr; gap: 8px; align-items: baseline; }
.audit-summary strong { font-size: 24px; line-height: 32px; font-weight: 500; }
.audit-summary span, .audit-summary p { color: var(--muted); font-size: 14px; line-height: 20px; }
.audit-summary p { margin: 0; text-align: right; }

.catalog-group { width: min(calc(100% - 32px), 1232px); margin: 0 auto; padding: 72px 16px 32px; }
.group-heading { margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.group-heading h2 { margin: 0; font-size: 28px; line-height: 38px; font-weight: 500; }
.story-grid, .story-grid--wide { display: grid; grid-template-columns: 1fr; gap: 64px; }
.grid-grammar { grid-template-columns: 1fr; gap: 64px; }
.story { display: grid; min-width: 0; align-content: start; grid-auto-rows: max-content; overflow: visible; padding: 0; border: 0; border-radius: 0; background: transparent; }
.grid-grammar > .story { align-self: start; }
.story[data-audit-status="gap"] { background: transparent; }
.story[data-audit-status="gap"] .preview { opacity: .58; filter: grayscale(1); }
.story-meta { display: flex; min-height: 0; align-items: center; justify-content: space-between; gap: 12px; padding: 0 0 16px; background: transparent; }
.story-meta-title { display: inline-flex; min-width: 0; align-items: center; gap: 10px; }
.story-meta h3 { margin: 0; font-size: 16px; line-height: 24px; font-weight: 500; }
.story-meta > strong { font-size: 16px; line-height: 24px; font-weight: 500; }
.story-meta-title > strong { font-size: 16px; line-height: 24px; font-weight: 500; }
.story-meta-actions { display: inline-flex; min-width: 0; align-items: center; gap: 8px; }
.story-meta > code, .story-meta-title > code { min-width: 0; overflow-wrap: anywhere; font-size: 14px; line-height: 20px; }
.controls-trigger, .control-popover-close { border: 0; color: var(--ink); background: transparent; cursor: pointer; font: inherit; }
.controls-trigger { min-height: 34px; padding: 7px 12px; border: 1px solid var(--line-default); border-radius: 9999px; font-size: 14px; line-height: 18px; white-space: nowrap; }
.controls-trigger:hover, .controls-trigger[aria-expanded="true"] { border-color: var(--ink); background: var(--surface); }
.controls-trigger:focus-visible, .control-popover-close:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.control-popover { position: fixed; z-index: 60; top: 72px; right: 24px; display: grid; width: min(400px, calc(100vw - var(--sidebar) - 48px)); max-height: calc(100vh - 96px); overflow: hidden; border: 1px solid var(--line-default); border-radius: 20px; background: rgba(254, 254, 254, .96); box-shadow: 0 24px 72px rgba(0, 0, 0, .16); backdrop-filter: blur(18px); }
.control-popover[hidden] { display: none; }
.control-popover-header { display: flex; min-height: 56px; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 16px 12px 20px; border-bottom: 1px solid var(--line); }
.control-popover-title { display: grid; min-width: 0; gap: 1px; }
.control-popover-title strong { overflow: hidden; font-size: 15px; line-height: 22px; font-weight: 500; text-overflow: ellipsis; white-space: nowrap; }
.control-popover-title span { color: var(--muted); font-size: 12px; line-height: 18px; }
.control-popover-close { display: grid; width: 32px; height: 32px; place-items: center; flex: 0 0 32px; border-radius: 50%; font-size: 22px; line-height: 1; }
.control-popover-close:hover { background: var(--surface); }
.control-popover-body { display: grid; gap: 0; padding: 4px 20px 16px; overflow-y: auto; overscroll-behavior: contain; }
.control-popover-body .lab-switch-field, .control-popover-body .space-tier-field { display: flex; width: 100%; min-height: 56px; align-items: center; justify-content: space-between; gap: 16px; border-bottom: 1px solid var(--line); }
.control-popover-body .lab-switch-field:last-child, .control-popover-body .space-tier-field:last-child { border-bottom: 0; }
.control-popover-body .lab-switch-label { order: -1; }
.control-popover-body .space-tier-control { max-width: 70%; overflow-x: auto; }
.lab-switch-field { display: inline-flex; align-items: center; gap: 12px; }
.lab-switch { --thumb-x: 0px; display: inline-flex; width: 48px; height: 28px; flex: 0 0 48px; align-items: center; padding: 4px; border: 0; border-radius: 9999px; outline: none; background: rgba(110, 110, 115, .6); cursor: pointer; transition: background-color 200ms ease; }
.lab-switch[aria-checked="true"] { --thumb-x: 20px; background: var(--ink); }
.lab-switch:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.lab-switch:disabled { opacity: .6; cursor: not-allowed; }
.lab-switch-thumb { display: block; width: 20px; height: 20px; flex: 0 0 20px; border-radius: 50%; background: var(--white); box-shadow: 0 2px 5px rgba(0, 0, 0, .24); pointer-events: none; transform: translateX(var(--thumb-x)) scale(1); transition: transform 420ms cubic-bezier(.16, 1, .3, 1); }
.lab-switch:active:not(:disabled) .lab-switch-thumb { transform: translateX(var(--thumb-x)) scale(.9); }
.lab-switch-label { color: var(--ink); cursor: pointer; font-size: 14px; line-height: 20px; white-space: nowrap; }
.space-tier-field { display: inline-flex; align-items: center; gap: 8px; }
.space-tier-label { color: var(--ink); font-size: 14px; line-height: 20px; white-space: nowrap; }
.space-tier-control { position: relative; isolation: isolate; display: inline-flex; align-items: center; gap: 4px; padding: 4px; border-radius: 9999px; background: var(--surface); }
.space-tier-control .motion-tab-indicator { position: absolute; z-index: 0; top: 4px; bottom: 4px; left: 0; width: 0; border-radius: 9999px; background: var(--inverse); pointer-events: none; transform: translateX(0); }
.space-tier-control button { position: relative; z-index: 1; min-width: 36px; min-height: 32px; padding: 6px 14px; border: 0; border-radius: 9999px; color: var(--muted); background: transparent; cursor: pointer; font-size: 14px; line-height: 20px; font-weight: 500; white-space: nowrap; transition: color 200ms ease; }
.space-tier-control button:hover { color: var(--ink); background: transparent; }
.space-tier-control button[aria-selected="true"] { color: var(--white); background: transparent; }
.space-tier-control button[aria-selected="true"]:hover { color: var(--white); }
.space-tier-control button:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.preview-structural-frame { position: relative; width: calc(100% + 32px); margin-inline: -16px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: transparent; }
.preview-structural-frame::before,
.preview-structural-frame::after { content: ""; position: absolute; z-index: 2; top: 0; bottom: 0; width: 1px; background: var(--line); pointer-events: none; }
.preview-structural-frame::before { left: 16px; }
.preview-structural-frame::after { right: 16px; }
.preview {
  width: calc(100% - 32px);
  height: auto;
  min-height: 0;
  margin-inline: 16px;
  overflow: hidden;
  border: 0;
  background: var(--white);
}
.mini-scene, .structure-preview, .motion-preview { min-height: 240px; }
.grid-preview { min-height: 240px; }
.story > footer { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; padding-top: 12px; }
.story > footer:empty { display: none; }
.story > footer strong { font-size: 16px; line-height: 24px; font-weight: 500; }
.story > footer span { color: var(--muted); font-size: 14px; line-height: 20px; text-align: right; }
.story > footer > span:only-child { margin-left: auto; }
.structure-relation { display: grid; gap: 12px; padding: 24px 0 16px; border-bottom: 1px solid var(--line); }
.structure-relation > header { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; }
.structure-relation > header strong { font-size: 14px; line-height: 20px; font-weight: 500; }
.structure-relation > header span { color: var(--muted); font-size: 13px; line-height: 18px; }
.relation-structure-cell { position: relative; padding: 16px; border: 1px solid var(--line-default); background: var(--white); }
.relation-structure-cell::before { content: "16"; position: absolute; top: 1px; left: 50%; color: var(--muted); background: var(--white); font-size: 11px; line-height: 14px; transform: translate(-50%, -50%); }
.relation-structure-cell::after { content: "16"; position: absolute; top: 50%; left: 1px; color: var(--muted); background: var(--white); font-size: 11px; line-height: 14px; transform: translate(-50%, -50%); }
.relation-layer-name { position: absolute; z-index: 2; top: -10px; left: 12px; padding: 0 4px; color: var(--muted); background: var(--white); font-size: 12px; line-height: 18px; }
.relation-structure-inset { position: relative; display: grid; min-height: 180px; padding: 32px 24px 24px; border: 1px dashed var(--line-default); place-items: center; }
.relation-inset-name { position: absolute; top: 8px; left: 10px; color: var(--muted); font-size: 12px; line-height: 18px; }
.relation-component { width: min(100%, 760px); border: 1px solid var(--line-default); background: var(--white); }
.relation-component--generic { display: grid; min-height: 112px; place-items: center; }
.relation-component--card { width: min(100%, 420px); padding: 24px; border: 0; border-radius: 24px; background: var(--surface); }
.relation-component--card::before { content: "组件 padding 24"; display: block; margin-bottom: 18px; color: var(--muted); font-size: 12px; line-height: 18px; }
.relation-component--card > div { display: grid; gap: 8px; padding: 12px; outline: 1px solid var(--line-default); background: var(--white); }
.relation-component strong { font-size: 14px; line-height: 20px; font-weight: 500; }
.relation-component span { color: var(--muted); font-size: 12px; line-height: 18px; }
.relation-component--media-card { display: grid; width: min(100%, 520px); overflow: hidden; border: 0; border-radius: 24px; background: var(--surface); }
.relation-media-area { display: grid; min-height: 104px; border-bottom: 1px solid var(--line); background: var(--strong); place-content: center; text-align: center; }
.relation-copy-area { display: grid; gap: 4px; padding: 16px 36px 24px; }
.relation-component--pair { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; border: 0; }
.relation-component--pair > div { display: grid; min-height: 112px; align-content: end; gap: 4px; padding: 24px 36px; border-radius: 24px; background: var(--surface); }
.relation-component--metrics > div { border-radius: 0; background: transparent; outline: 1px solid var(--line-default); }
.relation-detail { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.relation-detail p { display: grid; grid-template-columns: 132px 1fr; gap: 12px; margin: 0; padding-top: 8px; }
.relation-detail b { font-size: 13px; line-height: 20px; font-weight: 500; }
.relation-detail span { color: var(--secondary); font-size: 13px; line-height: 20px; }
.variant-tabs { display: grid; }
.variant-tab-list { position: relative; display: inline-flex; width: max-content; align-items: center; gap: 4px; margin-bottom: 24px; padding: 4px; border: 0; border-radius: 9999px; background: var(--surface); }
.variant-tab-indicator { position: absolute; z-index: 0; top: 4px; bottom: 4px; left: 0; width: 0; border-radius: 9999px; background: var(--inverse); pointer-events: none; transform: translateX(0); }
.variant-tab-list button { position: relative; z-index: 1; min-height: 32px; padding: 6px 14px; border: 0; border-radius: 9999px; color: var(--muted); background: transparent; cursor: pointer; font-size: 14px; line-height: 20px; font-weight: 500; white-space: nowrap; }
.variant-tab-list button:hover { color: var(--ink); background: transparent; }
.variant-tab-list button[aria-selected="true"] { color: var(--white); background: transparent; }
.variant-tab-list button[aria-selected="true"]:hover { color: var(--white); background: transparent; }
.variant-tab-list button:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.variant-tab-viewport { margin-inline: -16px; padding-inline: 16px; overflow: hidden; }
.variant-tab-panel[hidden] { display: none !important; }
.variant-tab-panel > footer { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; padding: 16px 0 0; }
.variant-tab-panel > footer strong { font-size: 16px; line-height: 24px; font-weight: 500; }
.variant-tab-panel > footer span { color: var(--muted); font-size: 14px; line-height: 20px; text-align: right; }
.spec-panel { margin-top: 16px; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; background: transparent; box-shadow: none; }
.spec-panel > header { display: flex; min-height: 52px; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 0; border: 0; border-bottom: 1px solid var(--line); }
.spec-panel > header strong { font-size: 14px; line-height: 22px; font-weight: 500; }
.spec-heading { display: flex; align-items: center; gap: 10px; }
.audit-status { padding: 4px 8px; border-radius: var(--radius-focus, 4px); color: var(--secondary); background: var(--surface); font-size: 12px; line-height: 18px; font-weight: 500; }
.audit-status--ready { color: #17633a; background: #edf8f1; }
.audit-status--structure { color: #375a7f; background: #eef4fa; }
.audit-status--gap { color: #92400e; background: #fff3df; }
.copy-agent { min-height: 34px; padding: 7px 12px; border: 0; border-radius: 9999px; color: var(--white); background: var(--inverse); cursor: pointer; font-size: 14px; line-height: 20px; }
.copy-agent:hover { background: #24262a; }
.copy-agent:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.copy-agent:disabled { color: var(--quiet); background: var(--strong); cursor: not-allowed; }
.copy-agent--meta { min-height: 34px; padding: 7px 12px; }
.copy-agent--meta:hover { background: #24262a; text-decoration: none; }
.spec-panel dl { display: block; margin: 0; border: 0; }
.spec-panel dl > div { display: grid; min-width: 0; grid-template-columns: 136px minmax(0, 1fr); gap: 16px; padding: 12px 0; border: 0; border-bottom: 1px solid var(--line); }
.spec-panel dl > div:last-child { border-bottom: 0; }
.spec-panel dt, .spec-panel dd { margin: 0; font-size: 14px; line-height: 22px; }
.spec-panel dt { color: var(--muted); }.spec-panel dd { color: var(--ink); font-variant-numeric: tabular-nums; }
.copy-feedback { position: fixed; z-index: 50; right: 24px; bottom: 24px; padding: 12px 16px; border-radius: 14px; color: var(--white); background: var(--inverse); font-size: 14px; line-height: 20px; }

/* Copy stories */
.title-cell { height: auto; min-height: 0; }
.preview--opening-copy { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: 16px; padding: 96px 0; align-items: start; background-color: var(--canvas); }
.preview--opening-copy .opening-title { grid-column: 2 / span 10; min-width: 0; padding: 0 36px; text-align: center; }
.preview--opening-copy h3 { margin: 0; font-size: 48px; line-height: 60px; font-weight: 500; letter-spacing: 0; }
.preview--opening-copy h3 span { display: flex; align-items: baseline; justify-content: center; white-space: nowrap; }
.preview--opening-copy .opening-lead { grid-column: 3 / span 8; min-width: 0; margin: 0; padding: 24px 36px; color: var(--ink); font-size: 16px; line-height: 24px; font-weight: 350; text-align: center; }
.preview--opening-copy[data-lead-visible="false"] .opening-lead { display: none; }
.preview--route { display: grid; place-content: center; padding: 96px 36px; text-align: center; }
.preview--route h3 { max-width: 760px; margin: 0; font-size: 40px; line-height: 50px; font-weight: 500; }
.preview--route p { max-width: 620px; margin: 16px auto 0; color: var(--secondary); font-size: 16px; line-height: 26px; font-weight: 350; }
.preview--route[data-lead-visible="false"] p { display: none; }
.section1-preview { height: auto; padding: 16px; }
.section1-content-group { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: 16px; padding: 128px 36px 24px; }
.section1-heading-owner { grid-column: 1 / span 5; min-width: 0; padding: 0; }
.section1-heading-owner .section1-kicker { display: block; margin: 0 0 8px; padding: 0; color: var(--muted); font-size: 14px; line-height: 20px; font-weight: 500; }
.section1-heading-owner h3 { margin: 0; padding: 0; font-size: 34px; line-height: 44px; font-weight: 500; }
.section1-content-group > p { grid-column: 7 / span 6; min-width: 0; margin: 0; padding: 0; align-self: start; color: var(--secondary); font-size: 16px; line-height: 26px; font-weight: 350; }
.section1-preview[data-kicker-visible="true"] .section1-content-group > p { margin-top: 28px; }
.section1-preview[data-kicker-visible="false"] .section1-kicker { display: none; }
.section2-preview { padding: 16px; }
.section2-scenario-preview { padding: 16px; }
.section2-scenario-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: 16px; min-width: 0; }
.section2-scenario-heading-owner,
.section2-scenario-grid > p { min-width: 0; margin: 0; padding: 48px 36px 24px; overflow-wrap: anywhere; }
.section2-scenario-heading-owner { grid-column: 1 / span 5; }
.section2-scenario-heading-owner h3 { margin: 0; font-size: 28px; line-height: 38px; font-weight: 500; }
.section2-scenario-grid > p { grid-column: 7 / span 6; color: var(--secondary); font-size: 16px; line-height: 26px; font-weight: 350; }
.section2-scenario-preview[data-kicker-visible="true"] .section2-scenario-grid > p { padding-top: 76px; }
.section2-scenario-preview[data-kicker-visible="false"] .section2-kicker { display: none; }
.section2-content-group { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: 16px; padding: 0; }
.section2-heading-owner { grid-column: 1 / span 5; min-width: 0; padding: 48px 36px 24px; }
.section2-kicker { display: block; margin: 0 0 8px; color: var(--muted); font-size: 14px; line-height: 20px; font-weight: 500; }
.section2-heading-owner h3 { margin: 0; font-size: 28px; line-height: 38px; font-weight: 500; white-space: nowrap; }
.section2-lead { grid-column: 7 / span 6; min-width: 0; margin: 0; padding: 48px 36px 24px; align-self: start; color: var(--secondary); font-size: 16px; line-height: 26px; font-weight: 350; }
.section2-preview[data-kicker-visible="true"] .section2-lead { margin-top: 28px; }
.section2-preview[data-kicker-visible="false"] .section2-kicker { display: none; }
.section2-preview[data-lead-visible="false"] .section2-lead { display: none; }
.section2-evidence-stage { margin: calc(16px + var(--card-space-before, 0px)) 0 var(--card-space-after, 0px); padding: 0; }
.section2-evidence { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: 16px; row-gap: 16px; margin: 0; padding: 0; }
.section2-title-following .section2-evidence > span:first-child { display: block; grid-column: 1 / -1; }
.section2-preview[data-evidence-rows="two"] .section2-title-following .section2-evidence > span:nth-child(2) { display: block; grid-column: 1 / -1; }
.section-variant-panel { display: none; }
.section-variant-preview[data-section-variant="content"] [data-section-panel="content"],
.section-variant-preview[data-section-variant="pair"] [data-section-panel="pair"],
.section-variant-preview[data-section-variant="centered"] [data-section-panel="centered"],
.section-variant-preview[data-section-variant="scenario"] [data-section-panel="scenario"] { display: block; }
.story[data-active-section-mode="centered"] [data-section-option="kicker"] { display: none; }
.section-variable-card { display: none; min-height: 180px; padding: 24px; border-radius: 24px; background: var(--surface); }
.section-variable-preview[data-card-visible="true"] .section-variable-card { display: block; }
.section-variable-preview[data-card-visible="false"] .section2-title-following { display: none; }
.section-variable-preview[data-card-space-before="0"] { --card-space-before: 0px; }
.section-variable-preview[data-card-space-before="96"] { --card-space-before: 96px; }
.section-variable-preview[data-card-space-before="128"] { --card-space-before: 128px; }
.section-variable-preview[data-card-space-after="0"] { --card-space-after: 0px; }
.section-variable-preview[data-card-space-after="96"] { --card-space-after: 96px; }
.section-variable-preview[data-card-space-after="128"] { --card-space-after: 128px; }
.section-variable-preview[data-card-position="below"] .section-variable-card { margin: calc(16px + var(--card-space-before, 0px)) 0 var(--card-space-after, 0px); }
.section-variable-preview[data-card-visible="true"][data-card-position="left"],
.section-variable-preview[data-card-visible="true"][data-card-position="right"] { display: grid; grid-template-columns: repeat(12,minmax(0,1fr)); column-gap: 16px; row-gap: 0; align-items: start; }
.section-variable-preview[data-card-position="left"] .section1-content-group,
.section-variable-preview[data-card-position="left"] .section2-content-group { align-self: end; margin-bottom: var(--card-space-after, 0px); }
.section-variable-preview[data-card-position="left"] .section1-content-group { grid-column: 7 / span 6; }
.section-variable-preview[data-card-position="left"] .section2-content-group { grid-column: 7 / span 6; }
.section-variable-preview[data-card-position="left"] .section-variable-card,
.section-variable-preview[data-card-position="left"] .section2-title-following { grid-column: 1 / span 6; grid-row: 1; margin: var(--card-space-before, 0px) 0 var(--card-space-after, 0px); }
.section-variable-preview[data-card-position="right"] .section1-content-group,
.section-variable-preview[data-card-position="right"] .section2-content-group { align-self: end; margin-bottom: var(--card-space-after, 0px); }
.section-variable-preview[data-card-position="right"] .section1-content-group { grid-column: 1 / span 6; }
.section-variable-preview[data-card-position="right"] .section2-content-group { grid-column: 1 / span 6; }
.section-variable-preview[data-card-position="right"] .section-variable-card,
.section-variable-preview[data-card-position="right"] .section2-title-following { grid-column: 7 / span 6; grid-row: 1; margin: var(--card-space-before, 0px) 0 var(--card-space-after, 0px); }
.section-variable-preview[data-card-position="left"] .section2-title-following,
.section-variable-preview[data-card-position="right"] .section2-title-following { padding: 0; }
.section-variable-preview[data-card-position="left"] .section-variable-card,
.section-variable-preview[data-card-position="right"] .section-variable-card { min-height: 240px; margin-top: var(--card-space-before, 0px); align-self: start; }
.section-variable-preview[data-card-position="left"] .section1-content-group,
.section-variable-preview[data-card-position="right"] .section1-content-group,
.section-variable-preview[data-card-position="left"] .section2-content-group,
.section-variable-preview[data-card-position="right"] .section2-content-group {
  display: block;
  min-width: 0;
  text-align: left;
}
.section-variable-preview[data-card-position="left"] .section2-content-group,
.section-variable-preview[data-card-position="right"] .section2-content-group { padding: 48px 36px 24px; }
.section-variable-preview[data-card-position="left"] .section1-heading-owner,
.section-variable-preview[data-card-position="right"] .section1-heading-owner,
.section-variable-preview[data-card-position="left"] .section2-heading-owner,
.section-variable-preview[data-card-position="right"] .section2-heading-owner {
  width: 100%;
  padding: 0;
}
.section-variable-preview[data-card-position="left"] .section1-heading-owner h3,
.section-variable-preview[data-card-position="right"] .section1-heading-owner h3,
.section-variable-preview[data-card-position="left"] .section2-heading-owner h3,
.section-variable-preview[data-card-position="right"] .section2-heading-owner h3 {
  white-space: normal;
}
.section-variable-preview[data-card-position="left"] .section1-content-group > p,
.section-variable-preview[data-card-position="right"] .section1-content-group > p,
.section-variable-preview[data-card-position="left"] .section2-lead,
.section-variable-preview[data-card-position="right"] .section2-lead {
  display: block;
  width: 100%;
  margin: 16px 0 0;
  padding: 0;
}
.section-variable-preview[data-lead-visible="false"][data-card-position="left"] .section1-content-group > p,
.section-variable-preview[data-lead-visible="false"][data-card-position="right"] .section1-content-group > p,
.section-variable-preview[data-lead-visible="false"][data-card-position="left"] .section2-lead,
.section-variable-preview[data-lead-visible="false"][data-card-position="right"] .section2-lead {
  display: none;
}
.section-variable-preview[data-title-align="center"] .section1-content-group,
.section-variable-preview[data-title-align="center"] .section2-content-group { display: block; text-align: center; }
.section-variable-preview[data-title-align="center"] .section2-content-group { padding: 48px 36px 24px; }
.section-variable-preview[data-title-align="center"] .section1-heading-owner,
.section-variable-preview[data-title-align="center"] .section2-heading-owner { max-width: 860px; margin-inline: auto; padding: 0; }
.section-variable-preview[data-lead-visible="false"] .section1-content-group > p,
.section-variable-preview[data-lead-visible="false"] .section2-lead { display: none; }
.section-variable-preview[data-title-align="center"][data-lead-visible="true"] .section1-content-group > p,
.section-variable-preview[data-title-align="center"][data-lead-visible="true"] .section2-lead { display: block; max-width: 680px; margin: 16px auto 0; padding: 0; }
.section2-evidence > span { display: none; min-height: 240px; border: 1px solid var(--line-default); border-radius: 24px; background: var(--white); }
.section2-preview[data-evidence-layout="full"] .section2-evidence > span:first-child { display: block; grid-column: 1 / -1; }
.section2-preview[data-evidence-layout="full"][data-evidence-rows="two"] .section2-evidence > span:nth-child(2) { display: block; grid-column: 1 / -1; }
.section2-preview[data-evidence-layout="pair"] .section2-evidence > span:nth-child(-n + 2) { display: block; grid-column: span 6; }
.section2-preview[data-evidence-layout="pair"][data-evidence-rows="two"] .section2-evidence > span:nth-child(-n + 4) { display: block; grid-column: span 6; }
.section2-preview[data-evidence-layout="triplet"] .section2-evidence > span:nth-child(-n + 3) { display: block; grid-column: span 4; }
.section2-preview[data-evidence-layout="triplet"][data-evidence-rows="two"] .section2-evidence > span { display: block; grid-column: span 4; }
.section2-preview[data-evidence-layout="weighted"] .section2-evidence > span:nth-child(1) { display: block; grid-column: span 8; }
.section2-preview[data-evidence-layout="weighted"] .section2-evidence > span:nth-child(2) { display: block; grid-column: span 4; }
.section2-preview[data-evidence-layout="weighted"][data-evidence-rows="two"] .section2-evidence > span:nth-child(3) { display: block; grid-column: span 8; }
.section2-preview[data-evidence-layout="weighted"][data-evidence-rows="two"] .section2-evidence > span:nth-child(4) { display: block; grid-column: span 4; }
.section-card-pair-preview { padding: 16px; }
.section-card-pair-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: 16px; padding: 0; align-items: start; }
.section-card-pair-heading { grid-column: 1 / span 6; min-width: 0; padding: 128px 36px 24px; }
.section-card-pair-heading .section1-kicker { display: block; margin: 0 0 8px; padding: 0; color: var(--muted); font-size: 14px; line-height: 20px; font-weight: 500; }
.section-card-pair-heading h3 { margin: 0; padding: 0; font-size: 34px; line-height: 44px; font-weight: 500; }
.section-card-pair-heading p { margin: 16px 0 0; padding: 0; color: var(--secondary); font-size: 16px; line-height: 26px; font-weight: 350; }
.section-card-pair-preview--section2 .section-card-pair-heading { padding: 48px 36px 24px; }
.section-card-pair-preview--section2 .section-card-pair-heading h3 { font-size: 28px; line-height: 38px; }
.section-card-pair-preview[data-kicker-visible="false"] .section1-kicker { display: none; }
.section-card-pair-card { display: grid; min-width: 0; min-height: 240px; grid-column: 7 / span 6; align-self: stretch; align-content: end; padding: 24px; border-radius: 24px; background: var(--surface); }
.section-card-pair-card h4 { margin: 0; padding: 0; font-size: 18px; line-height: 28px; font-weight: 400; }
.section-card-pair-card p { margin: 8px 0 0; padding: 0; color: var(--secondary); font-size: 16px; line-height: 26px; font-weight: 350; }
.section-card-pair-preview[data-title-side="right"] .section-card-pair-heading { grid-column: 7 / span 6; }
.section-card-pair-preview[data-title-side="right"] .section-card-pair-card { grid-column: 1 / span 6; grid-row: 1; }
.section1-centered-group { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: 16px; padding: 96px 36px; }
.section1-centered-group h3 { grid-column: 3 / span 8; min-width: 0; margin: 0; padding: 0; font-size: 34px; line-height: 44px; font-weight: 500; text-align: center; white-space: nowrap; }
.title-spacing-audit { gap: 16px; }
.preview--sidecar-copy { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 16px; padding: 16px; }
.preview--sidecar-copy .mock-media { grid-column: 1 / span 8; }
.preview--sidecar-copy > div:last-child { display: flex; grid-column: 9 / span 4; flex-direction: column; justify-content: flex-end; padding: 24px; }
.preview--sidecar-copy h3 { margin: 0 0 8px; font-size: 28px; line-height: 38px; font-weight: 500; }
.preview--sidecar-copy p { max-width: 720px; margin: 0; color: var(--secondary); font-size: 16px; line-height: 26px; font-weight: 350; }
.mock-media { overflow: hidden; border-radius: 20px; background: var(--surface); }
.mock-media img { display: block; width: 100%; height: 100%; border-radius: 0; object-fit: contain; }

/* Scene stories */
.mini-scene { position: relative; padding: 24px; }
.mini-scene b { font-size: 18px; line-height: 25px; font-weight: 500; }
.mini-scene small, .mini-scene span { color: var(--muted); font-size: 14px; line-height: 20px; }
.scene-route { display: grid; place-content: center; gap: 8px; text-align: center; }
.scene-route b { font-size: 23px; }
.scene-process { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; align-content: end; }
.scene-process > div { grid-column: 1 / -1; display: grid; gap: 5px; }
.scene-process > i { height: 70px; border-radius: 16px; background: var(--strong); }
.scene-important { display: flex; flex-direction: column; justify-content: center; gap: 12px; text-align: left; }
.scene-important b { max-width: 720px; font-size: 34px; line-height: 44px; font-weight: 500; }
.scene-important span { color: #92400e; }
.scene-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; align-items: stretch; }
.scene-pair > div { display: flex; flex-direction: column; justify-content: flex-end; gap: 7px; padding: 18px; border-radius: 16px; background: var(--strong); }
.scene-comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding: 16px; }
.scene-comparison > div { display: grid; grid-template-rows: auto 1fr auto; gap: 10px; padding: 14px; border-radius: 16px; background: var(--white); }
.scene-comparison > div.is-selected { outline: 1px solid var(--ink); }
.scene-comparison i { border-radius: 16px; background: var(--strong); }
.scene-sequence { display: flex; align-items: center; justify-content: center; gap: 0; }
.scene-sequence span { display: grid; width: 44px; height: 44px; border: 1px solid var(--line-default); border-radius: 50%; color: var(--ink); background: var(--white); place-items: center; }
.scene-sequence i { width: 42px; height: 1px; background: var(--line-default); }
.scene-bento { display: grid; grid-template-columns: repeat(6, 1fr); grid-template-rows: 1.2fr .8fr; gap: 10px; padding: 16px; }
.scene-bento i { border-radius: 16px; background: var(--strong); }
.scene-bento i:nth-child(-n+2) { grid-column: span 3; }
.scene-bento i:nth-child(n+3) { grid-column: span 2; }
.scene-sidecar { display: grid; grid-template-columns: 1.2fr .8fr; gap: 12px; padding: 16px; }
.scene-sidecar > i { border-radius: 20px; background: var(--strong); }
.scene-sidecar > div { display: flex; flex-direction: column; justify-content: flex-end; gap: 7px; padding: 16px; }
.scene-proof { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; align-content: center; }
.scene-proof > div { display: grid; gap: 8px; padding: 14px; border-radius: 16px; background: var(--strong); }
.scene-proof strong { font-size: 25px; font-weight: 400; }
.scene-ending { display: grid; align-items: end; padding: 0; border-bottom: 0; }
.scene-ending > div { padding: 0 24px 24px; }
.scene-ending b, .scene-ending span { display: block; }

/* Grid stories */
.grid-preview { position: relative; display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 16px; padding: 16px; align-content: stretch; isolation: isolate; }
.grid-preview::before { content: ""; position: absolute; z-index: 0; inset: 16px; --track: calc((100% - 176px) / 12); background-image: repeating-linear-gradient(to right, var(--surface) 0 var(--track), transparent var(--track) calc(var(--track) + 16px)); pointer-events: none; }
.grid-preview::after { display: none; }
.grid-track-labels { display: none; }
.grid-preview i { position: relative; z-index: 1; display: flex; min-width: 0; min-height: 208px; flex-direction: column; justify-content: flex-end; gap: 4px; padding: 20px 24px; border: 1px solid var(--line-default); border-radius: 0; color: var(--secondary); background: transparent; font-style: normal; text-align: left; }
.grid-preview i strong { color: var(--ink); font-size: 16px; line-height: 24px; font-weight: 500; }
.grid-preview i span { color: var(--muted); font-size: 14px; line-height: 20px; font-weight: 400; }
.grid-content-preview--cards::before { display: none; }
.grid-content-preview--cards i { overflow: hidden; border: 0; border-radius: 24px; background: var(--surface); }
.grid-content-preview--cards i p { margin: 8px 0 0; color: var(--secondary); }
.grid-content-preview--cards.cols-pair i { gap: 0; }
.grid-content-preview--cards.cols-pair i strong { font-size: 18px; line-height: 28px; font-weight: 400; }
.grid-content-preview--cards.cols-pair i p { font-size: 16px; line-height: 26px; font-weight: 350; }
.grid-content-preview--cards.cols-triplet i { gap: 0; }
.grid-content-preview--cards.cols-triplet i strong { font-size: 16px; line-height: 24px; font-weight: 400; }
.grid-content-preview--cards.cols-triplet i p { font-size: 15px; line-height: 24px; font-weight: 350; }
.external-caption-preview { align-content: start; align-items: start; }
.external-caption-preview::before { display: none; }
.external-caption-item { position: relative; z-index: 1; display: grid; grid-column: span 6; grid-template-columns: minmax(0, 1fr); grid-template-rows: 208px max-content; align-content: start; align-self: start; row-gap: 24px; min-width: 0; }
.external-caption-item i { grid-column: 1; grid-row: 1; overflow: hidden; width: 100%; height: 208px; min-height: 0; padding: 0; border: 0; border-radius: 24px; background: var(--surface); }
.external-card-copy { grid-column: 1; grid-row: 2; display: grid; gap: 8px; margin: 0; padding: 0 var(--space-editorial, 36px); }
.external-card-copy strong { color: var(--ink); font-size: 18px; line-height: 28px; font-weight: 400; }
.external-card-copy p { margin: 0; color: var(--secondary); font-size: 16px; line-height: 26px; font-weight: 350; }
.card-layout-preview { align-content: start; align-items: start; }
.card-layout-preview::before { display: none; }
.card-layout-item { position: relative; z-index: 1; display: grid; min-width: 0; grid-template-rows: 208px max-content; row-gap: 24px; }
.card-layout-preview[data-card-columns="2"] .card-layout-item { grid-column: span 6; }
.card-layout-preview[data-card-columns="3"] .card-layout-item { grid-column: span 4; }
.card-layout-preview[data-card-columns="2"] .card-layout-item:nth-child(3) { display: none; }
.card-layout-item > i { display: flex; width: 100%; height: 208px; min-height: 0; justify-content: flex-end; overflow: hidden; padding: var(--space-compact, 24px); border: 0; border-radius: 24px; background: var(--surface); }
.card-inside-copy { display: grid; gap: 8px; }
.card-inside-copy p { margin: 0; color: var(--secondary); }
.card-layout-preview[data-card-copy="inside"] .external-card-copy { display: none; }
.card-layout-preview[data-card-copy="outside"] .card-inside-copy { display: none; }
.card-layout-preview[data-card-copy="inside"] .card-layout-item { grid-template-rows: 208px; row-gap: 0; }
.card-layout-preview[data-card-columns="2"] strong { font-size: 18px; line-height: 28px; font-weight: 400; }
.card-layout-preview[data-card-columns="2"] p { font-size: 16px; line-height: 26px; font-weight: 350; }
.card-layout-preview[data-card-columns="3"] strong { font-size: 16px; line-height: 24px; font-weight: 400; }
.card-layout-preview[data-card-columns="3"] p { font-size: 15px; line-height: 24px; font-weight: 350; }
.open-grid-stage { --context-height: 64px; position: relative; isolation: isolate; display: grid; grid-template-rows: var(--context-height) auto var(--context-height); overflow: visible; background: transparent; }
.open-grid-stage[data-position="tail"] { grid-template-rows: var(--context-height) auto; }
.open-grid-context { position: relative; z-index: 1; display: grid; align-items: center; padding: 0 36px; color: var(--quiet); font-size: 12px; line-height: 18px; }
.open-grid-context--before::after { content: "上一排结构范围"; }
.open-grid-context--after::after { content: "下一排结构范围"; }
.open-grid-stage[data-position="tail"] .open-grid-context--after { display: none; }
.open-grid-rule { position: absolute; z-index: 2; right: -16px; left: -16px; height: 1px; background: var(--line); pointer-events: none; }
.open-grid-rule--top { top: var(--context-height); }
.open-grid-rule--bottom { bottom: var(--context-height); }
.open-grid-stage[data-position="tail"] .open-grid-rule--bottom { display: none; }
.open-grid-axes { position: absolute; z-index: 0; inset: 0; pointer-events: none; }
.open-grid-axes span { position: absolute; top: 0; bottom: 0; width: 1px; background: var(--line); }
.open-grid-axes span:first-child { left: 0; }.open-grid-axes span:last-child { left: 100%; }
.open-grid-stage[data-above-axes="false"] .open-grid-axes span:not(:first-child):not(:last-child) { top: var(--context-height); }
.open-grid-stage[data-below-axes="false"]:not([data-position="tail"]) .open-grid-axes span:not(:first-child):not(:last-child) { bottom: var(--context-height); }
.open-grid-stage[data-above-axes="false"] .open-grid-context--before::after { content: "上一排无同轴竖线（默认）"; }
.open-grid-stage[data-above-axes="true"] .open-grid-context--before::after { content: "上一排同轴竖线延续（少见）"; }
.open-grid-stage[data-below-axes="false"] .open-grid-context--after::after { content: "下一排无同轴竖线（默认）"; }
.open-grid-stage[data-below-axes="true"] .open-grid-context--after::after { content: "下一排同轴竖线延续（少见）"; }
.open-grid-stage[data-columns="3"] .open-grid-axes span:nth-child(2) { left: 33.333333%; }
.open-grid-stage[data-columns="3"] .open-grid-axes span:nth-child(3) { left: 66.666667%; }
.open-grid-stage[data-columns="3"] .open-grid-axes span:nth-child(4) { display: none; }
.open-grid-stage[data-columns="4"] .open-grid-axes span:nth-child(2) { left: 25%; }
.open-grid-stage[data-columns="4"] .open-grid-axes span:nth-child(3) { left: 50%; }
.open-grid-stage[data-columns="4"] .open-grid-axes span:nth-child(4) { left: 75%; }
.open-grid-content { position: relative; z-index: 1; display: grid; grid-row: 2; gap: 0; }
.open-grid-stage[data-columns="3"] .open-grid-content { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.open-grid-stage[data-columns="4"] .open-grid-content { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.open-owner { min-width: 0; border: 0; border-radius: 0; background: transparent; }
.open-grid-stage[data-position="tail"] .open-owner { min-height: 360px; }
.open-owner-content { display: flex; min-height: 100%; padding: 36px 36px 36px; flex-direction: column; justify-content: flex-start; }
.open-grid-stage[data-position="tail"] .open-owner { padding: 16px; }
.open-grid-stage[data-position="tail"] .open-owner-content { padding: 36px 36px 24px; }
.open-grid-stage[data-columns="3"] .open-owner:nth-child(4) { display: none; }
.open-owner h3 { margin: 0 0 12px; font-size: 18px; line-height: 28px; font-weight: 400; }
.open-owner p { max-width: 24em; margin: 0; color: var(--muted); font-size: 16px; line-height: 26px; font-weight: 350; }
.open-grid-junctions { position: absolute; z-index: 4; right: 0; left: 0; height: 0; pointer-events: none; }
.open-grid-junctions--top { top: var(--context-height); }
.open-grid-junctions--bottom { bottom: var(--context-height); }
.open-grid-stage[data-position="tail"] .open-grid-junctions--bottom { display: none; }
.open-grid-junctions .junction { position: absolute; top: 0; background: var(--white); transform: translate(-50%, -50%); }
.open-grid-junctions .junction:first-child { left: 0; }.open-grid-junctions .junction:last-child { left: 100%; }
.open-grid-stage[data-columns="3"] .open-grid-junctions .junction:nth-child(2) { left: 33.333333%; }
.open-grid-stage[data-columns="3"] .open-grid-junctions .junction:nth-child(3) { left: 66.666667%; }
.open-grid-stage[data-columns="3"] .open-grid-junctions .junction:nth-child(4) { display: none; }
.open-grid-stage[data-columns="4"] .open-grid-junctions .junction:nth-child(2) { left: 25%; }
.open-grid-stage[data-columns="4"] .open-grid-junctions .junction:nth-child(3) { left: 50%; }
.open-grid-stage[data-columns="4"] .open-grid-junctions .junction:nth-child(4) { left: 75%; }
.single-media-preview { padding: 16px; }
.single-media-panel { display: flex; min-height: 280px; flex-direction: column; justify-content: flex-end; gap: 4px; padding: 24px; background: var(--surface); }
.single-media-panel strong { font-size: 16px; line-height: 24px; font-weight: 500; }
.single-media-panel span { color: var(--muted); font-size: 14px; line-height: 20px; }
.single-media-panel--rounded { border-radius: 24px; }
.viewport-canvas-story { width: 100%; }
.viewport-canvas-preview {
  width: calc(100vw - var(--sidebar));
  height: clamp(320px, 34vw, 420px);
  margin-left: calc((100% - (100vw - var(--sidebar))) / 2);
  margin-right: 0;
  overflow: hidden;
  background: var(--surface);
}
.viewport-canvas-schematic { display: grid; width: 100%; height: 100%; place-content: center; text-align: center; }
.viewport-canvas-schematic strong { font-size: 16px; line-height: 24px; font-weight: 500; }
.viewport-canvas-schematic span { margin-top: 4px; color: var(--muted); font-size: 14px; line-height: 20px; }
.viewport-canvas-frame { display: block; width: 100%; height: 100%; border: 0; background: var(--paper); }
.grid-content-preview--sidecar i:first-of-type { border: 0; background: var(--surface); }
.grid-content-preview--sidecar i:last-of-type { border-color: var(--line); background: var(--white); }
.cols-full i { grid-column: span 12; }
.cols-pair i { grid-column: span 6; }
.cols-left i:first-of-type { grid-column: span 8; }.cols-left i:last-of-type { grid-column: span 4; }
.cols-right i:first-of-type { grid-column: span 4; }.cols-right i:last-of-type { grid-column: span 8; }
.cols-triplet i { grid-column: span 4; }
.grid-span-label { display: none; }

/* Color tokens */
.token-preview {
  display: grid;
  height: auto;
  min-height: 620px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  padding: 16px;
  overflow: visible;
  background: var(--surface);
  transition: color 180ms ease, background-color 180ms ease;
}
.token-preview[data-color-mode="light"] {
  --color-flat1: #fefefe;
  --color-flat2: #f9f9f9;
  --color-flat3: #f5f5f5;
  --color-text1: #000;
  --color-text2: rgba(0, 0, 0, .65);
  --color-text3: rgba(0, 0, 0, .48);
  --color-text-inverse: #fff;
  --color-shape-neutral1: #000;
  --color-shape-neutral2: rgba(0, 0, 0, .17);
  --color-shape-neutral3: rgba(0, 0, 0, .12);
  --color-shape-neutral4: rgba(0, 0, 0, .05);
  --color-shape-neutral5: rgba(0, 0, 0, .02);
  --color-shape-secondary1: #20d5ec;
  --color-shape-secondary2: rgba(32, 213, 236, .50);
  --color-shape-secondary3: rgba(32, 213, 236, .32);
  --color-shape-secondary4: rgba(32, 213, 236, .13);
  --color-shape-secondary5: rgba(32, 213, 236, .05);
}
.token-preview[data-color-mode="dark"] {
  --color-flat1: #121212;
  --color-flat2: #1e1e1e;
  --color-flat3: #2c2c2c;
  --color-text1: #f6f6f6;
  --color-text2: rgba(255, 255, 255, .88);
  --color-text3: rgba(255, 255, 255, .60);
  --color-text-inverse: #000;
  --color-shape-neutral1: #fafafa;
  --color-shape-neutral2: rgba(255, 255, 255, .32);
  --color-shape-neutral3: rgba(255, 255, 255, .19);
  --color-shape-neutral4: rgba(255, 255, 255, .13);
  --color-shape-neutral5: rgba(255, 255, 255, .08);
  --color-shape-secondary1: #20d5ec;
  --color-shape-secondary2: rgba(32, 213, 236, .50);
  --color-shape-secondary3: rgba(32, 213, 236, .32);
  --color-shape-secondary4: rgba(32, 213, 236, .21);
  --color-shape-secondary5: rgba(32, 213, 236, .13);
  color: var(--color-text1);
  background: var(--color-flat1);
}
.token-swatch { display: grid; min-width: 0; grid-template-columns: 64px minmax(0, 1fr); grid-template-rows: auto auto auto; column-gap: 16px; align-content: center; padding: 16px; border-radius: 16px; background: var(--white); }
.token-preview[data-color-mode="dark"] .token-swatch { background: var(--color-flat2); }
.token-swatch i { grid-row: 1 / span 3; width: 64px; height: 64px; border: 1px solid var(--line-default); border-radius: 16px; background: var(--swatch); }
.token-preview[data-color-mode="dark"] .token-swatch i { border-color: var(--color-shape-neutral3); }
.token-swatch code { overflow: hidden; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 14px; line-height: 20px; text-overflow: ellipsis; white-space: nowrap; }
.token-swatch b { font-size: 14px; line-height: 20px; font-weight: 400; font-variant-numeric: tabular-nums; }
.token-swatch > span { color: var(--muted); font-size: 14px; line-height: 20px; }
.token-preview[data-color-mode="dark"] .token-swatch > span { color: var(--color-text3); }
.token-value-dark { display: none; }
.token-preview[data-color-mode="dark"] .token-value-light { display: none; }
.token-preview[data-color-mode="dark"] .token-value-dark { display: inline; }

/* Media stories */
.rounded-card-spacing { gap: 20px; }
.content-spacing-definition { display: grid; border: 1px solid var(--line-default); background: var(--white); }
.content-spacing-definition > header { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 16px; border-bottom: 1px solid var(--line); }
.content-spacing-definition > header strong { font-size: 16px; line-height: 24px; font-weight: 500; }
.content-spacing-definition > header span { color: var(--muted); font-size: 13px; line-height: 20px; }
.content-spacing-layer { display: grid; grid-template-columns: minmax(220px, .9fr) minmax(320px, 1.5fr) minmax(170px, .7fr) minmax(260px, 1fr); align-items: center; border-bottom: 1px solid var(--line); }
.content-spacing-layer > * { min-width: 0; margin: 0; padding: 14px 16px; border-left: 1px solid var(--line); }
.content-spacing-layer > *:first-child { border-left: 0; }
.content-spacing-layer b { font-size: 14px; line-height: 22px; font-weight: 500; }
.content-spacing-layer p,.content-spacing-layer em { color: var(--secondary); font-size: 13px; line-height: 20px; font-style: normal; }
.content-spacing-layer > strong { font-size: 18px; line-height: 26px; font-weight: 500; font-variant-numeric: tabular-nums; }
.content-spacing-layer--structure > strong { display: none; }
.content-spacing-layer--structure { grid-template-columns: minmax(220px, .9fr) minmax(490px, 2.2fr) minmax(260px, 1fr); }
.content-spacing-warning { margin: 0; padding: 14px 16px; color: var(--secondary); font-size: 13px; line-height: 21px; }
.content-spacing-warning strong { color: var(--ink); font-weight: 500; }
.rounded-structure-shell { position: relative; padding: 16px; border: 1px solid var(--line-default); background: var(--white); }
.rounded-layer-label { position: absolute; top: -10px; left: 12px; padding: 0 4px; color: var(--muted); background: var(--white); font-size: 12px; line-height: 18px; }
.rounded-grid-frame { position: relative; min-height: 360px; padding: 40px 0 0; overflow: hidden; border: 1px dashed var(--line-default); }
.rounded-grid-label { position: absolute; z-index: 3; top: 10px; left: 12px; color: var(--secondary); font-size: 12px; line-height: 18px; }
.rounded-grid-columns { position: absolute; z-index: 0; inset: 40px 0 0; display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 16px; padding: 0; pointer-events: none; }
.rounded-grid-columns::before { content: ""; grid-column: 1 / -1; background: repeating-linear-gradient(to right, rgba(0,0,0,.028) 0, rgba(0,0,0,.028) calc((100% - 176px) / 12), transparent calc((100% - 176px) / 12), transparent calc((100% - 176px) / 12 + 16px)); }
.rounded-card-placement { position: relative; z-index: 2; display: grid; min-height: 320px; grid-template-rows: 64px auto 64px; }
.rounded-card-margin { display: flex; align-items: center; justify-content: center; gap: 10px; color: var(--muted); font-size: 12px; line-height: 18px; }
.rounded-card-margin b { color: var(--ink); font-weight: 500; }
.rounded-card-row { display: grid; grid-template-columns: 48px minmax(0, 1fr) 48px; align-items: center; }
.rounded-card-row > span { color: var(--muted); font-size: 12px; line-height: 18px; text-align: center; }
.rounded-spacing-card { display: grid; min-height: 220px; align-content: center; gap: 8px; padding: 24px; border: 1px solid var(--ink); border-radius: 24px; background: var(--white); text-align: center; }
.rounded-spacing-card strong { font-size: 18px; line-height: 28px; font-weight: 500; }
.rounded-spacing-card small { color: var(--muted); font-size: 13px; line-height: 20px; }
.rounded-page-audit { display: grid; gap: 12px; }
.rounded-page-audit h3 { margin: 0; font-size: 16px; line-height: 24px; font-weight: 500; }
.rounded-audit-coverage,.rounded-audit-excluded { margin: 0; color: var(--secondary); font-size: 13px; line-height: 20px; }
.rounded-audit-coverage strong,.rounded-audit-excluded strong { color: var(--ink); font-weight: 500; }
.rounded-audit-excluded { padding: 12px 16px; background: var(--surface-subtle); }
.rounded-audit-table { display: grid; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.rounded-audit-table > div { display: grid; grid-template-columns: minmax(160px, .8fr) minmax(220px, 1.2fr) minmax(160px, 1fr) minmax(220px, 1.2fr); border-top: 1px solid var(--line); }
.rounded-audit-table > div:first-child { border-top: 0; }
.rounded-audit-table strong,.rounded-audit-table span { padding: 12px 16px; border-left: 1px solid var(--line); font-size: 13px; line-height: 20px; }
.rounded-audit-table strong,.rounded-audit-table span:first-child { border-left: 0; }
.rounded-audit-table strong { font-weight: 500; }
.rounded-audit-table span { color: var(--secondary); }
.rounded-audit-head span { color: var(--muted); }
.rounded-spacing-note { margin: 0; color: var(--secondary); font-size: 14px; line-height: 22px; }
.rounded-spacing-note strong { color: var(--ink); font-weight: 500; }
.media-padding-audit { gap: 24px; }
.layer-order { width: 100%; }
.layer-order-cell { position: relative; padding: 16px; border: 1px solid var(--line-default); background: var(--white); }
.layer-order-label { position: absolute; top: -10px; left: 12px; padding: 0 4px; color: var(--muted); background: var(--white); font-size: 12px; line-height: 18px; }
.layer-order-inset { display: grid; min-height: 176px; gap: 16px; padding: 20px; border: 1px dashed var(--line-default); color: var(--muted); font-size: 13px; line-height: 18px; place-items: center; }
.layer-order-owner { display: grid; width: min(100%, 680px); gap: 12px; padding: 16px; border: 1px solid var(--ink); color: var(--ink); background: var(--white); }
.layer-order-content { display: grid; min-height: 64px; border: 1px solid var(--line-default); color: var(--secondary); place-items: center; }
.layer-order-rhythm { margin: 12px 0 0; color: var(--secondary); font-size: 13px; line-height: 20px; }
.layer-order-rhythm strong { color: var(--ink); font-weight: 500; }
.padding-audit-table { display: grid; border-top: 1px solid var(--line); }
.padding-audit-row { display: grid; grid-template-columns: 1.05fr 1.35fr 1.35fr .9fr; min-width: 0; border-bottom: 1px solid var(--line); }
.padding-audit-row > * { min-width: 0; margin: 0; padding: 14px 16px; border-left: 1px solid var(--line); font-size: 13px; line-height: 20px; font-style: normal; font-weight: 400; }
.padding-audit-row > *:first-child { border-left: 0; }
.padding-audit-row strong, .padding-audit-head b { color: var(--ink); font-weight: 500; }
.padding-audit-head { background: var(--surface); }
.padding-audit-row em { color: var(--muted); }
.padding-audit-row em.is-shared { color: #17633a; }
.padding-audit-row em.needs-decision { color: #92400e; }
.padding-audit-row em.is-internal { color: #375a7f; }
.convergence-list { display: grid; border-top: 1px solid var(--line); }
.convergence-list article { display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.convergence-list article > span { color: var(--muted); font-size: 13px; line-height: 20px; }
.convergence-list strong { font-size: 15px; line-height: 22px; font-weight: 500; }
.convergence-list p { margin: 6px 0 0; color: var(--secondary); font-size: 14px; line-height: 22px; }
.convergence-note { margin: 16px 0 0; color: #92400e; font-size: 13px; line-height: 20px; }
.media-preview { position: relative; display: grid; place-items: center; }
.screen-lines { width: 82%; height: 66%; background: repeating-linear-gradient(to bottom, var(--line-strong) 0 8px, transparent 8px 18px), var(--surface); }
.media-raw { background: var(--white); }
.media-inset { margin: 16px; height: calc(var(--preview-height) - 32px); border-radius: 20px; background: var(--strong); }
.media-inset .screen-lines { border-radius: 0; }
.media-chrome { margin: 16px; height: calc(var(--preview-height) - 32px); grid-template-rows: 24px 1fr; overflow: hidden; border: 1px solid var(--line-default); border-radius: 16px; background: var(--white); }
.chrome-bar { display: flex; width: 100%; height: 24px; align-items: center; gap: 4px; padding-left: 9px; border-bottom: 1px solid var(--line); }
.chrome-bar i { width: 5px; height: 5px; border-radius: 50%; background: var(--quiet); }
.media-chrome .screen-lines { height: 72%; }
.media-interactive { display: flex; flex-direction: column; gap: 11px; background: var(--strong); }
.media-interactive button, .media-interactive a { align-self: flex-start; padding: 11px 15px; border: 0; border-radius: 9999px; color: var(--white); background: var(--inverse); text-decoration: none; }
.media-interactive button:hover, .media-interactive a:hover { background: #24262a; }
.media-interactive a:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.media-interactive span { color: var(--muted); font-size: 14px; line-height: 20px; }
.media-open { border-top: 0; border-bottom: 0; }
.media-open .node { position: absolute; left: 0; width: 14px; height: 14px; background: linear-gradient(var(--canvas),var(--canvas)) center/14px 3px no-repeat, linear-gradient(var(--canvas),var(--canvas)) center/3px 14px no-repeat; transform: translate(-50%, -50%); }
.media-open .node::before, .media-open .node::after { content: ""; position: absolute; top: 50%; left: 50%; background: var(--junction); transform: translate(-50%, -50%); }
.media-open .node::before { width: 8px; height: 1px; }.media-open .node::after { width: 1px; height: 8px; }
.media-open .node-a { top: 0; }.media-open .node-b { top: 100%; }

/* Shared media and content specimens. These are neutral anatomy diagrams, not project cases. */
.shared-media-preview, .shared-content-preview { display: grid; min-height: 0; padding: 16px; background: var(--canvas); place-items: center; }
.shared-media-preview span, .neutral-media span { color: var(--muted); font-size: 13px; line-height: 18px; letter-spacing: .04em; }
.raw-media-sample, .inset-media-sample, .interactive-stage-sample { display: grid; width: min(100%, 760px); aspect-ratio: 16 / 9; place-items: center; }
.raw-media-sample { border: 0; border-radius: 0; background: var(--strong); }
.inset-media-sample { overflow: hidden; border: 0; border-radius: 20px; background: transparent; }
.inset-media-sample > div { display: grid; width: 100%; height: 100%; border-radius: 0; background: var(--strong); place-items: center; }
.interactive-stage-sample { border: 0; border-radius: 0; background: repeating-linear-gradient(to bottom, var(--strong) 0 35px, var(--canvas) 35px 36px); }
.open-media-cell-sample { position: relative; padding: 16px; border: 0; background: transparent; }
.open-media-cell-sample > div { display: grid; width: 100%; min-height: 220px; border: 0; border-radius: 0; background: var(--strong); place-items: center; }

.shared-content-preview { position: relative; align-items: center; justify-items: stretch; }
.shared-content-preview > * { position: relative; z-index: 1; }
.content-card-preview, .full-media-preview { grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 16px; align-items: start; }
.shared-content-preview h3, .shared-content-preview p { margin: 0; }
.shared-content-preview h3 { font-size: 18px; line-height: 28px; font-weight: 400; }
.shared-content-preview p { color: var(--secondary); font-size: 16px; line-height: 26px; font-weight: 350; }
.shared-content-preview small { color: var(--muted); font-size: 14px; line-height: 20px; font-weight: 400; }
.reference-link-preview { min-height: 240px; padding: 36px; justify-items: end; }
.shared-content-preview .reference-link-sample { margin: 0; color: var(--muted); font-size: 14px; line-height: 20px; font-weight: 400; text-align: right; }
.media-sidecar-copy-preview { grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 16px; place-items: stretch; }
.media-sidecar-copy-preview .neutral-media { display: grid; min-height: 280px; grid-column: 1 / span 8; border-radius: 20px; background: var(--surface); place-items: center; }
.media-sidecar-copy-preview .neutral-media span,.external-caption-sample .neutral-media span { color: var(--muted); font-size: 14px; line-height: 20px; }
.media-sidecar-copy-sample { display: flex; min-width: 0; grid-column: 9 / span 4; padding: 24px; flex-direction: column; justify-content: flex-end; }
.media-sidecar-copy-sample h3 { font-size: 28px; line-height: 38px; font-weight: 500; }
.media-sidecar-copy-sample p { margin-top: 8px; font-size: 16px; line-height: 26px; font-weight: 350; }
.external-caption-sample { place-items: stretch; }
.external-caption-sample .external-caption-item { display: grid; width: 100%; max-width: 560px; grid-template-rows: auto max-content; gap: 24px; }
.external-caption-sample .neutral-media { display: grid; aspect-ratio: 16/10; border-radius: 20px; background: var(--surface); place-items: center; }
.external-caption-sample .external-caption-item p { padding: 0 36px; color: var(--muted); font-size: 14px; line-height: 20px; font-weight: 400; }
.sequence-group-sample { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; place-items: stretch; }
.sequence-state { position: relative; z-index: 1; display: grid; min-width: 0; grid-template-rows: auto max-content; }
.sequence-state:not(:last-child)::after { content: ""; position: absolute; z-index: 2; top: 92px; right: -16px; width: 16px; height: 1px; background: var(--line-default); }
.sequence-media { display: grid; min-height: 184px; border-radius: 20px; background: var(--surface); place-items: center; }
.sequence-media span { color: var(--muted); font-size: 14px; line-height: 20px; }
.sequence-copy { display: grid; padding: 16px 24px 24px; }
.sequence-copy small { margin-bottom: 8px; }
.sequence-copy h3 { font-size: 15px; line-height: 22px; font-weight: 400; }
.sequence-copy p { margin-top: 4px; font-size: 14px; line-height: 22px; font-weight: 350; }
.reference-link-sample a { display: inline-flex; align-items: baseline; gap: 4px; color: var(--muted); text-decoration: none; transition: color 180ms ease; }
.reference-link-label { text-decoration-line: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.reference-link-sample a::after { content: "↗"; display: inline-block; color: currentColor; font-size: 13px; line-height: 1; opacity: 1; transform: translateY(1px); transition: transform 180ms ease; }
.reference-link-sample a:hover,.reference-link-sample a:focus-visible { color: var(--ink); }
.reference-link-sample a:hover::after,.reference-link-sample a:focus-visible::after { transform: translate(2px,1px); }
.reference-link-sample a:focus-visible { outline: 2px solid var(--ink); outline-offset: 4px; border-radius: 4px; }
.content-card-sample { grid-column: span 4; min-width: 0; min-height: 260px; padding: 24px; border: 0; border-radius: 24px; background: var(--surface); }
.content-card-sample h3 { margin-top: 0; }.content-card-sample p { margin-top: 8px; }
.full-media-bottom-copy-sample { display: grid; min-width: 0; grid-column: span 6; overflow: hidden; border: 0; border-radius: 24px; background: var(--surface); grid-template-rows: auto auto; }
.neutral-media { display: grid; width: 100%; aspect-ratio: 16 / 10; border: 0; border-radius: 0; background: var(--strong); place-items: center; }
.full-media-bottom-copy-sample > div:last-child { padding: 16px 36px 24px; }
.full-media-bottom-copy-sample p { margin-top: 4px; }
.comparison-group-sample { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 16px; }
.comparison-group-sample > article { grid-column: span 6; }
.comparison-group-sample > article { min-width: 0; padding: 24px 36px; border: 0; border-radius: 24px; background: var(--surface); }
.comparison-group-sample h3 { margin-top: 0; }.metric-group-sample strong { margin-top: 16px; }.comparison-group-sample p { margin-top: 4px; }
.metric-group-sample { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 16px; }
.metric-group-sample > article { grid-column: span 6; }
.metric-group-sample > article { min-width: 0; padding: 24px 36px; border: 0; border-radius: 0; background: transparent; }
.metric-group-sample > article + article { border-left: 1px solid var(--line); }
.metric-group-sample strong { display: block; font-size: 42px; line-height: 48px; font-weight: 400; }
.metric-group-sample span { display: block; color: var(--muted); font-size: 14px; line-height: 20px; }.metric-group-sample p { margin-top: 12px; }

/* Content stories */
.content-preview { padding: 28px; }
.content-preview small { color: var(--quiet); font-size: 14px; line-height: 20px; letter-spacing: .08em; }
.content-preview h3 { margin: 10px 0 8px; font-size: 18px; line-height: 28px; font-weight: 400; }
.content-preview p { margin: 0; color: var(--secondary); font-size: 16px; line-height: 26px; }
.card-filled { margin: 16px; height: calc(var(--preview-height) - 32px); padding: 24px; border-radius: var(--radius-container); background: var(--surface); }
.card-filled i { display: block; height: 45px; margin-top: 20px; border-radius: 16px; background: var(--white); }
.card-filled h3 { font-size: 18px; line-height: 28px; font-weight: 400; }
.insight-open { display: flex; flex-direction: column; justify-content: center; }
.metric-preview { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; align-content: center; }
.metric-preview > div { display: grid; gap: 7px; padding: 20px; border-radius: 0; background: transparent; }
.metric-preview strong { font-size: 32px; line-height: 38px; font-weight: 400; }
.metric-preview span { font-size: 14px; line-height: 20px; }
.statement-preview { display: flex; flex-direction: column; justify-content: flex-end; margin: 16px; height: calc(var(--preview-height) - 32px); border-radius: var(--radius-container); color: var(--white); background: var(--inverse); }
.statement-preview span { color: var(--white); font-size: 14px; line-height: 20px; letter-spacing: .08em; }
.statement-preview h3 { max-width: 420px; margin-bottom: 0; }
.story--full { grid-column: 1 / -1; }
.anatomy-canvas { display: grid; gap: 16px; padding: 16px; }
.anatomy-media { display: grid; min-height: 0; overflow: hidden; border-radius: 20px; background: repeating-linear-gradient(to bottom, transparent 0 34px, var(--line) 34px 35px), var(--strong); place-items: center; }
.anatomy-media span { padding: 6px 9px; border-radius: 10px; color: var(--muted); background: var(--white); font-size: 14px; line-height: 20px; }
.anatomy-copy { padding: 0 20px 12px; }
.anatomy-copy h3 { margin: 0 0 8px; font-size: 18px; line-height: 28px; font-weight: 400; }.anatomy-copy p { margin: 0; color: var(--secondary); font-size: 16px; line-height: 26px; font-weight: 350; }
.anatomy-only .anatomy-media { height: 100%; border-radius: 0; }
.anatomy-caption { grid-template-rows: 1fr auto; background: var(--white); }.anatomy-caption p { margin: 0 4px; color: var(--muted); font-size: 14px; line-height: 20px; }
.anatomy-full-bottom, .anatomy-attached { grid-template-rows: 1fr auto; padding: 0; background: var(--surface); }
.anatomy-full-bottom .anatomy-media, .anatomy-attached .anatomy-media { border-radius: 0; }
.anatomy-full-bottom .anatomy-copy { padding: 16px 36px 24px; }
.anatomy-inset-bottom { grid-template-rows: 1fr auto; background: var(--surface); }.anatomy-inset-bottom .anatomy-copy { padding: 0 20px 8px; }
.anatomy-attached { gap: 0; }.anatomy-attached .anatomy-copy { padding: 16px 24px 20px; border-top: 1px solid var(--line); }
.anatomy-illustration { grid-template-rows: 1.2fr auto; background: var(--surface); }.anatomy-illustration .anatomy-media { border-radius: 20px 20px 0 0; }.anatomy-illustration .anatomy-copy { padding: 0 20px 12px; }
.anatomy-editorial { grid-template-columns: 5fr 7fr; align-items: stretch; }.anatomy-editorial .anatomy-copy { display: flex; flex-direction: column; justify-content: flex-end; padding: 24px 20px; }

/* Relation stories */
.relation-preview { padding: 24px; }
.relation-sequence { display: flex; align-items: center; justify-content: center; }
.relation-sequence > div { display: grid; width: 28%; min-height: 130px; align-content: end; gap: 6px; padding: 16px; border-radius: 16px; background: var(--strong); }
.relation-sequence > em { width: 6%; height: 1px; background: var(--line-default); }
.relation-sequence i { color: var(--muted); font-size: 14px; line-height: 20px; font-style: normal; }
.relation-sequence b { font-size: 16px; line-height: 24px; font-weight: 500; }.relation-sequence span { color: var(--muted); font-size: 14px; line-height: 20px; }
.relation-comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.relation-comparison > div { display: grid; grid-template-rows: auto auto 1fr; gap: 9px; padding: 18px; border-radius: var(--radius-container); background: var(--strong); }
.relation-comparison > div.selected { outline: 1px solid var(--ink); }
.relation-comparison small { color: var(--muted); font-size: 14px; line-height: 20px; }.relation-comparison b { font-size: 16px; line-height: 24px; font-weight: 500; }.relation-comparison i { border-radius: 16px; background: var(--white); }

/* Structure stories */
.structure-preview { position: relative; }
.header-preview { display: grid; grid-template-rows: 54px 1fr; }
.header-preview > div { display: flex; align-items: center; justify-content: space-between; padding: 0 24px; border-bottom: 1px solid var(--line); background: var(--header-surface); }
.header-preview b { font-size: 16px; line-height: 24px; font-weight: 500; }.header-preview nav { font-size: 14px; line-height: 20px; }
.header-preview > span { background: var(--strong); }
.project-toc-preview { position: relative; min-height: 320px; overflow: visible; background: var(--canvas); }
.indicator-lines-preview { min-height: 240px; overflow: hidden; padding: 28px 36px; color: var(--muted); background: var(--surface); }
.indicator-lines-preview svg { display: block; width: 100%; height: auto; background: var(--surface); font-family: "PingFang SC", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif; font-synthesis: none; }
.indicator-lines-preview .route,
.indicator-lines-preview .return,
.indicator-lines-preview .route-arrow { fill: none; stroke: currentColor; stroke-width: 1.1; stroke-linecap: round; stroke-linejoin: round; }
.indicator-lines-preview .return { stroke-dasharray: 7 7; }
.indicator-lines-preview text { fill: var(--secondary); font-size: 14px; font-weight: 400; }
.project-toc-page { display: grid; width: min(62%, 640px); gap: 18px; padding: 64px 36px; }
.project-toc-page span { display: block; height: 14px; background: var(--line); }
.project-toc-page span:nth-child(1) { width: 48%; }
.project-toc-page span:nth-child(2) { width: 92%; }
.project-toc-page span:nth-child(3) { width: 72%; }
.project-toc-sample { position: absolute; z-index: 2; top: 50%; right: 10px; width: 32px; padding: 6px 0; transform: translateY(-50%); }
.project-toc-sample a { position: relative; display: flex; width: 32px; height: 18px; justify-content: flex-end; padding: 0; font-size: 0; text-decoration: none; }
.project-toc-sample a::before { content: ""; width: var(--rail-tick, 6px); height: 2px; background: var(--junction); transition: width 160ms ease, background-color 160ms ease; }
.project-toc-sample a::after { content: attr(aria-label); position: absolute; top: 50%; right: 32px; box-sizing: border-box; width: fit-content; max-width: 120px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 10px; color: var(--ink); background: var(--white); box-shadow: 0 8px 24px rgba(0,0,0,.08); font-size: 12px; line-height: 18px; font-weight: 400; letter-spacing: 0; white-space: nowrap; visibility: hidden; opacity: 0; pointer-events: none; transform: translate(6px,-50%); transition: opacity 140ms ease, transform 140ms ease, visibility 140ms; }
.project-toc-sample a:hover::before { background: var(--muted); }
.project-toc-sample a[aria-current="true"]::before { background: var(--ink); }
.project-toc-sample a:hover::after,.project-toc-sample a:focus-visible::after { visibility: visible; opacity: 1; transform: translate(0,-50%); }
.project-toc-sample a:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.rail-preview .rail-left, .rail-preview .rail-right { position: absolute; top: 0; bottom: 0; width: 1px; background: var(--line); }
.rail-preview .rail-left { left: 14%; }.rail-preview .rail-right { right: 14%; }
.rail-preview .axis { position: absolute; top: 50%; right: 14%; left: 14%; height: 1px; background: var(--line); }
.junction-preview { display: grid; min-height: 0; grid-template-columns: repeat(5, minmax(0, 1fr)); align-items: start; padding: 24px 36px; }
.junction-sample { display: grid; justify-items: center; gap: 12px; color: var(--muted); font-size: 14px; line-height: 20px; }
.junction { position: relative; width: 26px; height: 26px; background: var(--canvas); }
.junction::before, .junction::after { content: ""; position: absolute; top: 50%; left: 50%; background: var(--junction); transform: translate(-50%, -50%); }
.junction::before { width: 14px; height: 1px; }.junction::after { width: 1px; height: 14px; }
.junction.t-down::after { top: 50%; height: 7px; transform: translateX(-50%); }
.junction.t-up::after { top: auto; bottom: 50%; height: 7px; transform: translateX(-50%); }
.junction.t-left::before { left: auto; right: 50%; width: 7px; transform: translateY(-50%); }
.junction.t-right::before { left: 50%; width: 7px; transform: translateY(-50%); }
.open-grid-preview { display: grid; grid-template-columns: repeat(3, 1fr); align-items: stretch; padding: 36px 0 1px; }
.open-grid-preview > div { display: grid; place-items: center; color: var(--muted); font-size: 14px; line-height: 20px; }
.open-grid-preview .h-axis { display: none; }
.open-grid-preview .v-axis { position: absolute; top: 0; bottom: 0; width: 1px; background: var(--line); }
.open-grid-preview .v1 { left: 0; }.open-grid-preview .v2 { left: 33.333%; }.open-grid-preview .v3 { left: 66.666%; }
.open-grid-preview .junction { position: absolute; z-index: 2; top: 0; display: block; width: 26px; height: 26px; background: var(--canvas); transform: translate(-50%, -50%); }
.open-grid-preview .j1 { left: 0; }.open-grid-preview .j2 { left: 33.333%; }.open-grid-preview .j3 { left: 66.666%; }.open-grid-preview .j4 { left: 100%; }

/* Motion stories */
.motion-preview { padding: 28px; }
.reveal-preview { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; align-items: end; }
.reveal-preview > div { display: grid; height: 76%; align-content: end; gap: 8px; padding: 18px; border-radius: 16px; background: var(--strong); }
.reveal-preview > div:nth-child(2) { height: 88%; }.reveal-preview > div:nth-child(3) { height: 100%; }
.reveal-preview i { color: var(--muted); font-size: 14px; line-height: 20px; font-style: normal; }.reveal-preview b { font-size: 16px; line-height: 24px; font-weight: 500; }
.title-reveal-preview { display: grid; align-content: center; }
.title-reveal-preview span { display: block; overflow: hidden; }
.title-reveal-preview b { display: block; font-size: clamp(30px, 5vw, 62px); line-height: 1.02; font-weight: 500; letter-spacing: -.04em; }

@media (max-width: 1180px) {
  .grid-grammar { grid-template-columns: 1fr; }
  .token-preview { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 820px) {
  :root { --sidebar: 0px; }
  .sidebar { position: static; width: auto; height: auto; padding: 16px; border-right: 0; border-bottom: 1px solid var(--line); }
  .nav { display: flex; margin-top: 16px; padding-bottom: 4px; overflow-x: auto; }
  .nav-item { width: auto; flex: 0 0 auto; gap: 8px; }
  .toolbar { top: 0; padding: 14px 16px; }
  .toolbar h1 { display: none; }
  .toolbar-title p { display: none; }
  .toolbar-actions { width: 100%; }
  .search { width: 100%; }
  .search-status { min-width: auto; }
  .control-popover { top: auto; right: 12px; bottom: 12px; left: 12px; width: auto; max-height: min(72vh, 620px); border-radius: 20px; }
  .catalog-group { padding: 64px 16px 0; }
  .story-grid, .story-grid--wide { grid-template-columns: 1fr; }
  .token-preview { grid-template-columns: 1fr; }
  .audit-summary { grid-template-columns: 1fr 1fr 1fr; margin-top: 16px; }
  .audit-summary p { grid-column: 1 / -1; text-align: left; }
  .spec-panel dl > div { grid-template-columns: 108px minmax(0, 1fr); }
  .preview-structural-frame { width: calc(100% + 32px); }
  .relation-detail { grid-template-columns: 1fr; }
  .relation-component--pair { grid-template-columns: 1fr; }
  .padding-audit-row { grid-template-columns: 1fr; padding: 12px 0; }
  .padding-audit-row > * { padding: 5px 0; border-left: 0; }
  .padding-audit-head { display: none; }
  .padding-audit-row strong::before { content: "语义层 · "; color: var(--muted); font-weight: 400; }
  .padding-audit-row span:nth-child(2)::before { content: "Project 1 · "; color: var(--muted); }
  .padding-audit-row span:nth-child(3)::before { content: "Project 2 · "; color: var(--muted); }
  .rounded-card-margin { flex-direction: column; gap: 2px; text-align: center; }
  .rounded-card-row { grid-template-columns: 36px minmax(0, 1fr) 36px; }
  .rounded-spacing-card { min-height: 180px; }
  .rounded-audit-table { overflow-x: auto; }
  .rounded-audit-table > div { min-width: 720px; }
  .rounded-audit-table strong,.rounded-audit-table span { padding: 10px 8px; }
  .content-spacing-definition > header { align-items: flex-start; flex-direction: column; gap: 4px; }
  .content-spacing-layer,.content-spacing-layer--structure { grid-template-columns: 1fr; padding: 12px 16px; }
  .content-spacing-layer > * { padding: 4px 0; border-left: 0; }
}

@media (max-width: 760px) {
  .preview--opening-copy { display: block; padding: 36px 0 96px; }
  .preview--opening-copy .opening-title,
  .preview--opening-copy .opening-lead { width: auto; margin: 0; padding: 24px 36px; text-align: left; }
  .preview--opening-copy h3 { font-size: 40px; line-height: 46px; }
  .preview--opening-copy h3 span { display: block; white-space: normal; }
  .section1-content-group { display: block; padding: 48px 20px 36px; }
  .section1-content-group > p,
  .section1-preview[data-kicker-visible="true"] .section1-content-group > p { margin-top: 24px; }
  .section-card-pair-grid { display: block; padding: 0; }
  .section2-content-group { display: block; padding: 40px 20px 24px; }
  .section2-heading-owner,.section2-lead { padding: 0; }
  .section2-scenario-grid { display: block; }
  .section2-scenario-heading-owner,
  .section2-scenario-grid > p { padding: 48px 20px 24px; }
  .section2-scenario-grid > p { padding-top: 0; }
  .section2-scenario-preview[data-kicker-visible="true"] .section2-scenario-grid > p { padding-top: 0; }
  .section2-lead,.section2-preview[data-kicker-visible="true"] .section2-lead { margin-top: 20px; }
  .section2-evidence { grid-template-columns: 1fr; padding-inline: 0; }
  .section2-preview .section2-evidence > span { grid-column: 1 !important; }
  .section-card-pair-heading { padding: 48px 20px 36px; }
  .section-card-pair-card { min-height: 180px; margin-top: 16px; }
  .open-grid-stage { --context-height: 56px; --content-height: auto; height: auto; min-height: 0; grid-template-rows: 56px auto 56px; }
  .open-grid-stage[data-position="tail"] { height: auto; grid-template-rows: 56px auto; }
  .open-grid-content,
  .open-grid-stage[data-columns="3"] .open-grid-content,
  .open-grid-stage[data-columns="4"] .open-grid-content { grid-template-columns: 1fr; gap: 0; }
  .open-owner { min-height: 160px; }
  .open-owner-content { padding: 36px 24px; }
  .open-grid-stage[data-position="tail"] .open-owner { padding: 16px; }
  .open-grid-stage[data-position="tail"] .open-owner-content { padding: 36px 36px 24px; }
  .open-grid-axes,.open-grid-junctions { display: none; }
  .story-meta-actions { align-items: flex-end; flex-direction: column; gap: 4px; }
  .section1-centered-group { display: block; padding: 96px 20px; }
  .section1-centered-group h3 { width: auto; max-width: none; font-size: 28px; line-height: 34px; white-space: normal; }
  .media-sidecar-copy-preview { display: block; }
  .media-sidecar-copy-preview .neutral-media { min-height: 220px; }
  .media-sidecar-copy-sample { padding: 24px 20px; }
  .external-caption-sample .external-caption-item { max-width: none; }
  .external-caption-sample .external-caption-item p { padding-inline: 20px; }
  .sequence-group-sample { grid-template-columns: 1fr; }
  .sequence-state:not(:last-child)::after { top: auto; right: auto; bottom: -16px; left: 50%; width: 1px; height: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .preview { transition: none; }
  .lab-switch,.lab-switch-thumb { transition-duration: 0ms; }
  .reference-link-sample a,.reference-link-sample a::after { transition: none; }
  .reference-link-sample a:hover::after,.reference-link-sample a:focus-visible::after { transform: translateY(1px); }
}