:root {
  color-scheme: light;
  --paper: #f3eddf;
  --paper-deep: #e7ddcb;
  --paper-raised: #fbf7ee;
  --ink: #281e18;
  --muted: #66574b;
  --night: #211a17;
  --night-raised: #2d231e;
  --night-line: #5d4b3f;
  --on-night: #f2e8d8;
  --on-night-muted: #c2b39f;
  --cinnabar: #9a3829;
  --cinnabar-dark: #75241c;
  --cinnabar-soft: #efddd3;
  --copper: #b08a5e;
  --copper-ink: #7b4e2e;
  --line: #c8b99f;
  --pass: #35634f;
  --pass-soft: #dde8df;
  --warn: #7b5120;
  --warn-soft: #eaddc5;
  --font-zh: "FangSong", "STFangsong", "仿宋", "FangSong_GB2312", "Songti SC",
    "Noto Serif CJK SC", "Source Han Serif SC", serif;
  --font-en: Baskerville, "Iowan Old Style", "Palatino Linotype", Palatino,
    "Book Antiqua", Georgia, serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --shell: min(1280px, calc(100% - 48px));
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--paper);
  scroll-behavior: smooth;
  scroll-padding-top: 82px;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-zh);
  font-size: 17px;
  font-synthesis-weight: none;
  letter-spacing: 0.025em;
  line-height: 1.78;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
  font: inherit;
}

html:not(.js) button {
  cursor: default;
  pointer-events: none;
}

button:focus-visible,
a:focus-visible,
[tabindex="-1"]:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 4px;
}

h1,
h2,
h3,
p,
dl,
dd,
ol {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-weight: 400;
  text-wrap: balance;
}

.latin {
  font-family: var(--font-en);
  letter-spacing: 0.02em;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 500;
  padding: 9px 14px;
  color: var(--on-night);
  background: var(--cinnabar);
  transform: translateY(-160%);
  transition: transform 160ms var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

.experience-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 10px max(24px, calc((100% - 1280px) / 2));
  color: var(--on-night);
  background: var(--night);
  border-bottom: 1px solid var(--copper);
}

.experience-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.experience-brand > span:last-child,
.experience-brand strong,
.experience-brand small {
  display: block;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: var(--on-night);
  border: 1px solid var(--copper);
  font-size: 22px;
  font-style: italic;
  line-height: 1;
}

.experience-brand strong {
  font-size: 18px;
  font-style: italic;
  font-weight: 600;
  line-height: 1.05;
}

.experience-brand small {
  margin-top: 3px;
  color: var(--on-night-muted);
  font-size: 10px;
  letter-spacing: 0.11em;
  line-height: 1.2;
}

.header-context {
  display: flex;
  align-items: center;
  gap: 0;
  color: var(--on-night-muted);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.header-context > * {
  min-height: 36px;
  padding: 6px 15px;
  border-left: 1px solid var(--night-line);
}

.header-context > span {
  display: inline-flex;
  align-items: center;
}

.header-context > span:nth-child(2) {
  color: var(--copper);
}

.header-context a {
  display: inline-flex;
  align-items: center;
  color: var(--on-night);
  transition: color 160ms ease;
}

.header-context a:hover,
.header-context a:focus-visible {
  color: var(--copper);
}

.experience-shell {
  width: var(--shell);
  margin-inline: auto;
}

.experience-intro {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(420px, 1.15fr);
  gap: clamp(56px, 8vw, 112px);
  align-items: end;
  padding-block: clamp(54px, 7vw, 88px) clamp(42px, 5vw, 64px);
  border-bottom: 1px solid var(--copper);
}

.chapter-label {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 17px;
  color: var(--copper-ink);
  font-size: 13px;
  letter-spacing: 0.11em;
}

.chapter-label::before {
  width: 24px;
  height: 1px;
  content: "";
  background: currentColor;
}

.chapter-label span {
  padding-right: 14px;
  color: var(--cinnabar);
  border-right: 1px solid var(--line);
}

.experience-intro h1 {
  max-width: 700px;
  margin-bottom: 0;
  font-size: clamp(46px, 5vw, 72px);
  letter-spacing: 0.045em;
  line-height: 1.14;
}

.intro-copy > p {
  max-width: 680px;
  margin-bottom: 26px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.9;
  text-wrap: pretty;
}

.contract-strip {
  margin-bottom: 0;
  border-top: 1px solid var(--line);
}

.contract-strip > div {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 18px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
}

.contract-strip dt,
.contract-strip dd {
  margin: 0;
  font-size: 12px;
}

.contract-strip dt {
  color: var(--copper-ink);
  letter-spacing: 0.1em;
}

.contract-strip dd {
  overflow-wrap: anywhere;
  color: var(--ink);
  font-family: var(--font-mono);
  letter-spacing: 0;
}

.leader-workspace {
  display: grid;
  grid-template-columns: minmax(470px, 0.88fr) minmax(520px, 1.12fr);
  gap: 0;
  margin-block: clamp(38px, 5vw, 64px);
  background: var(--paper-raised);
  border: 1px solid var(--line);
}

.control-column {
  min-width: 0;
  border-right: 1px solid var(--copper);
}

.scenario-panel,
.question-panel {
  padding: clamp(24px, 3vw, 36px);
}

.question-panel {
  border-top: 1px solid var(--copper);
}

.panel-heading,
.section-heading {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.panel-heading > span,
.section-heading > span {
  flex: 0 0 auto;
  color: var(--cinnabar);
  font-family: var(--font-en);
  font-size: 17px;
  font-style: italic;
  line-height: 1.3;
}

.panel-heading h2,
.panel-heading p,
.section-heading h2,
.section-heading p {
  margin-bottom: 0;
}

.panel-heading h2 {
  font-size: 24px;
  letter-spacing: 0.035em;
  line-height: 1.3;
}

.panel-heading p,
.section-heading p {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.scenario-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 24px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.scenario-tabs button {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 2px 9px;
  min-height: 82px;
  padding: 12px;
  text-align: left;
  background: transparent;
  border: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  transition: color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.scenario-tabs button > span {
  grid-row: 1 / 3;
  color: var(--copper-ink);
  font-family: var(--font-en);
  font-size: 14px;
  font-style: italic;
}

.scenario-tabs button strong {
  align-self: end;
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0.035em;
  line-height: 1.25;
}

.scenario-tabs button small {
  overflow: hidden;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0;
  line-height: 1.3;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.scenario-tabs button:hover {
  background: var(--paper-deep);
}

.scenario-tabs button[aria-selected="true"] {
  color: var(--cinnabar-dark);
  background: var(--paper-deep);
  box-shadow: inset 0 2px 0 var(--cinnabar);
}

.scenario-facts {
  margin-top: 22px;
  border-top: 1px solid var(--ink);
}

.scenario-facts > header {
  padding: 17px 0 15px;
  border-bottom: 1px solid var(--line);
}

.scenario-facts > header > span {
  display: block;
  margin-bottom: 5px;
  color: var(--cinnabar);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
}

.scenario-facts[data-scenario-kind="blocked"] > header > span {
  color: var(--warn);
}

.scenario-facts[data-scenario-kind="ready"] > header > span {
  color: var(--pass);
}

.scenario-facts h3 {
  margin-bottom: 0;
  font-size: 19px;
  letter-spacing: 0.025em;
  line-height: 1.42;
}

.scenario-facts dl {
  margin-bottom: 0;
}

.scenario-facts dl > div {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 16px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}

.scenario-facts dt,
.scenario-facts dd {
  margin: 0;
  font-size: 11px;
  line-height: 1.45;
}

.scenario-facts dt {
  color: var(--muted);
  letter-spacing: 0.08em;
}

.scenario-facts dd {
  overflow-wrap: anywhere;
  font-family: var(--font-mono);
  letter-spacing: 0;
}

.question-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.question-list button {
  display: grid;
  grid-template-columns: 35px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  width: 100%;
  min-height: 66px;
  padding: 13px 14px;
  text-align: left;
  background: transparent;
  border: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  transition: color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.question-list button > span {
  color: var(--copper-ink);
  font-family: var(--font-en);
  font-size: 14px;
  font-style: italic;
}

.question-list button strong {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.03em;
  line-height: 1.45;
}

.question-list button:hover {
  background: var(--paper-deep);
}

.question-list button[aria-pressed="true"] {
  color: var(--cinnabar-dark);
  background: var(--paper-deep);
  box-shadow: inset 2px 0 0 var(--cinnabar);
}

.answer-sheet {
  min-width: 0;
  background: var(--paper-raised);
}

.answer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 94px;
  padding: 20px clamp(24px, 3.5vw, 42px);
  color: var(--on-night);
  background: var(--night);
  border-bottom: 1px solid var(--copper);
}

.answer-header > div:first-child {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  min-width: 0;
}

.answer-header > div:first-child > span {
  color: var(--copper);
  font-family: var(--font-en);
  font-size: 17px;
  font-style: italic;
}

.answer-header p,
.answer-header h2 {
  margin-bottom: 0;
}

.answer-header p {
  color: var(--on-night-muted);
  font-size: 11px;
  letter-spacing: 0.09em;
}

.answer-header h2 {
  margin-top: 2px;
  font-size: clamp(22px, 2.4vw, 30px);
  letter-spacing: 0.035em;
  line-height: 1.3;
}

.answer-mode {
  flex: 0 0 auto;
  padding-left: 18px;
  border-left: 1px solid var(--night-line);
  text-align: right;
}

.answer-mode span,
.answer-mode small {
  display: block;
}

.answer-mode span {
  color: var(--copper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0;
}

.answer-mode span[data-mode="live"] {
  color: #9fc4ae;
}

.answer-mode small {
  margin-top: 2px;
  color: var(--on-night-muted);
  font-size: 10px;
  letter-spacing: 0.05em;
}

.answer-loading {
  padding: 9px clamp(24px, 3.5vw, 42px);
  color: var(--copper-ink);
  background: var(--paper-deep);
  border-bottom: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: 0.05em;
}

.answer-summary,
.answer-detail-grid,
.answer-boundaries,
.answer-footer {
  margin-inline: clamp(24px, 3.5vw, 42px);
}

.answer-summary {
  padding: 28px 0 26px 22px;
  border-bottom: 1px solid var(--line);
  border-left: 2px solid var(--cinnabar);
}

.answer-sheet h3 {
  margin-bottom: 10px;
  color: var(--copper-ink);
  font-size: 12px;
  letter-spacing: 0.11em;
  line-height: 1.3;
}

.answer-summary p {
  margin-bottom: 0;
  color: var(--ink);
  font-size: clamp(20px, 2.2vw, 27px);
  letter-spacing: 0.03em;
  line-height: 1.58;
  text-wrap: pretty;
}

.answer-detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 0.88fr);
  gap: 32px;
  padding-block: 24px;
  border-bottom: 1px solid var(--line);
}

.text-ledger,
.evidence-list,
.answer-boundaries ol {
  margin-bottom: 0;
  padding: 0;
  list-style: none;
}

.text-ledger {
  counter-reset: management-point;
}

.text-ledger li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  padding: 8px 0;
  border-top: 1px solid var(--line);
  counter-increment: management-point;
  font-size: 14px;
  line-height: 1.55;
}

.text-ledger li::before {
  color: var(--cinnabar);
  content: counter(management-point, decimal-leading-zero);
  font-family: var(--font-en);
  font-size: 12px;
  font-style: italic;
}

.evidence-list li {
  padding: 8px 0;
  border-top: 1px solid var(--line);
}

.evidence-list code,
.evidence-list span {
  display: block;
}

.evidence-list code {
  overflow-wrap: anywhere;
  color: var(--cinnabar-dark);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0;
}

.evidence-list span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.answer-boundaries {
  padding-block: 22px;
  border-bottom: 1px solid var(--line);
}

.answer-boundaries ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.answer-boundaries li {
  padding-left: 13px;
  color: var(--muted);
  border-left: 1px solid var(--copper);
  font-size: 13px;
  line-height: 1.6;
}

.answer-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 58px;
}

.answer-footer p {
  margin-bottom: 0;
  overflow-wrap: anywhere;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0;
}

.answer-footer button {
  min-height: 38px;
  padding: 5px 12px;
  color: var(--cinnabar-dark);
  background: transparent;
  border: 1px solid var(--cinnabar);
  cursor: pointer;
  font-size: 12px;
  letter-spacing: 0.06em;
  transition: color 160ms ease, background 160ms ease;
}

.answer-footer button:hover,
.answer-footer button:focus-visible {
  color: var(--paper-raised);
  background: var(--cinnabar);
}

.decision-boundary {
  padding-block: clamp(32px, 5vw, 58px) clamp(58px, 7vw, 86px);
  border-top: 1px solid var(--copper);
}

.section-heading h2 {
  font-size: clamp(28px, 3vw, 40px);
  letter-spacing: 0.035em;
  line-height: 1.25;
}

.boundary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 28px;
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--line);
}

.boundary-grid article {
  min-height: 180px;
  padding: 24px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.boundary-grid article > span {
  color: var(--cinnabar);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.boundary-grid h3 {
  margin: 16px 0 8px;
  font-size: 23px;
  letter-spacing: 0.035em;
  line-height: 1.3;
}

.boundary-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.experience-footer {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding: 26px max(24px, calc((100% - 1280px) / 2));
  color: var(--on-night-muted);
  background: var(--night);
  border-top: 1px solid var(--copper);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.experience-footer p {
  margin-bottom: 0;
}

.noscript-note {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 200;
  max-width: 430px;
  margin: 0;
  padding: 12px 16px;
  color: var(--on-night);
  background: var(--cinnabar-dark);
  border: 1px solid var(--copper);
  font-size: 13px;
}

@media (max-width: 1120px) {
  .experience-intro {
    grid-template-columns: minmax(0, 0.78fr) minmax(380px, 1.22fr);
    gap: 50px;
  }

  .leader-workspace {
    grid-template-columns: minmax(400px, 0.82fr) minmax(440px, 1.18fr);
  }

  .scenario-tabs {
    grid-template-columns: 1fr;
  }

  .scenario-tabs button {
    grid-template-columns: 34px minmax(0, 1fr) auto;
    min-height: 54px;
  }

  .scenario-tabs button > span {
    grid-row: auto;
  }

  .scenario-tabs button small {
    align-self: center;
  }

  .answer-detail-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (max-width: 900px) {
  :root {
    --shell: min(100% - 38px, 760px);
  }

  .experience-intro {
    grid-template-columns: 1fr;
    gap: 34px;
    align-items: start;
  }

  .leader-workspace {
    grid-template-columns: 1fr;
  }

  .control-column {
    border-right: 0;
    border-bottom: 1px solid var(--copper);
  }

  .scenario-tabs {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .scenario-tabs button {
    grid-template-columns: auto minmax(0, 1fr);
    min-height: 78px;
  }

  .scenario-tabs button > span {
    grid-row: 1 / 3;
  }

  .scenario-tabs button small {
    align-self: auto;
  }
}

@media (max-width: 680px) {
  :root {
    --shell: min(100% - 28px, 760px);
  }

  html {
    scroll-padding-top: 68px;
  }

  body {
    font-size: 16px;
  }

  .experience-header {
    min-height: 64px;
    padding: 9px 14px;
  }

  .experience-brand small,
  .header-context > span:first-child {
    display: none;
  }

  .header-context > * {
    min-height: 34px;
    padding: 5px 9px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 20px;
  }

  .experience-brand strong {
    font-size: 17px;
  }

  .experience-intro {
    padding-block: 46px 38px;
  }

  .experience-intro h1 {
    font-size: clamp(38px, 11vw, 50px);
    line-height: 1.18;
  }

  .intro-copy > p {
    font-size: 16px;
  }

  .leader-workspace {
    margin-block: 30px 42px;
  }

  .scenario-panel,
  .question-panel {
    padding: 22px 18px;
  }

  .scenario-tabs {
    grid-template-columns: 1fr;
  }

  .scenario-tabs button {
    grid-template-columns: 36px minmax(0, 1fr) auto;
    min-height: 52px;
  }

  .scenario-tabs button > span {
    grid-row: auto;
  }

  .scenario-tabs button small {
    align-self: center;
  }

  .question-list {
    grid-template-columns: 1fr;
  }

  .question-list button {
    min-height: 54px;
  }

  .answer-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
    padding: 20px;
  }

  .answer-mode {
    width: 100%;
    padding: 10px 0 0;
    border-top: 1px solid var(--night-line);
    border-left: 0;
    text-align: left;
  }

  .answer-summary,
  .answer-detail-grid,
  .answer-boundaries,
  .answer-footer {
    margin-inline: 20px;
  }

  .answer-summary {
    padding: 22px 0 22px 16px;
  }

  .answer-summary p {
    font-size: 20px;
  }

  .answer-boundaries ol {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .answer-footer {
    align-items: flex-start;
    flex-direction: column;
    padding-block: 14px;
  }

  .boundary-grid {
    grid-template-columns: 1fr;
  }

  .boundary-grid article {
    min-height: auto;
  }

  .experience-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding: 24px 14px;
  }
}

@media (pointer: coarse) {
  button,
  .header-context a {
    min-height: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation: none !important;
    transition: none !important;
  }
}

@media (forced-colors: active) {
  .experience-header,
  .answer-header,
  .experience-footer {
    border-color: CanvasText;
  }

  button:focus-visible,
  a:focus-visible,
  [tabindex="-1"]:focus-visible {
    outline: 2px solid Highlight;
  }
}