@font-face {
  font-family: "Source Han Sans SC";
  src: url("fonts/source-han-sans-sc.woff2") format("woff2");
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
}

:root {
  --paper: #f6f8f9;
  --surface: #ffffff;
  --ink: #15191c;
  --muted: #5f6970;
  --line: #d5dde1;
  --line-strong: #9ba9b1;
  --accent: #2f5e73;
  --accent-soft: #e4eef2;
  --max: 1360px;
  --gutter: clamp(16px, 4.5vw, 72px);
  --measure: 72ch;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  color: var(--ink);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: clip;
  background: var(--paper);
  color: var(--ink);
  font-family: "Source Han Sans SC", "Source Han Sans CN", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--accent);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
[tabindex="0"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

h1,
h2,
h3,
h4,
h5,
p,
ul,
ol,
dl,
figure {
  margin-top: 0;
}

h1,
h2,
h3,
h4,
h5 {
  margin-bottom: 0;
  font-weight: 650;
  letter-spacing: -0.035em;
  line-height: 1.18;
  text-wrap: pretty;
}

p,
li,
td,
th {
  text-wrap: pretty;
}

ul,
ol {
  margin-bottom: 0;
  padding-left: 1.35em;
}

strong {
  font-weight: 650;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 14px 16px;
  vertical-align: top;
}

th {
  font-weight: 620;
}

caption {
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 13px;
  text-align: left;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 16px;
  padding: 8px 12px;
  transform: translateY(-160%);
  background: var(--ink);
  color: var(--surface);
  font-size: 14px;
}

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

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  backdrop-filter: blur(16px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(100%, var(--max));
  min-height: 64px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.wordmark {
  flex: 0 0 auto;
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0.01em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 26px;
  color: var(--muted);
  font-size: 13px;
}

.site-nav a {
  padding: 4px 0;
  border-bottom: 1px solid transparent;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.wrap {
  width: min(calc(100% - (var(--gutter) * 2)), var(--max));
  margin-right: auto;
  margin-left: auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.42fr) minmax(260px, 0.58fr);
  gap: clamp(48px, 9vw, 150px);
  align-items: end;
  min-height: 660px;
  padding-top: clamp(76px, 10vw, 146px);
  padding-bottom: clamp(80px, 10vw, 140px);
}

.kicker,
.note-label,
.section-mark,
.preset-index,
.question-number,
.conclusion-label span,
.big-number {
  color: var(--accent);
  font-weight: 650;
  letter-spacing: 0.08em;
}

.kicker {
  margin-bottom: 24px;
  font-size: 12px;
}

.hero h1 {
  max-width: 920px;
  font-size: clamp(46px, 6.7vw, 92px);
  letter-spacing: -0.065em;
  line-height: 1.05;
}

.hero-lede {
  max-width: 680px;
  margin: 40px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 1.7vw, 23px);
  line-height: 1.74;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-top: 38px;
  color: var(--muted);
  font-size: 12px;
}

.method-note {
  align-self: stretch;
  padding: 22px 0 0 30px;
  border-top: 2px solid var(--accent);
  border-left: 1px solid var(--line-strong);
}

.note-label {
  margin-bottom: 42px;
  font-size: 12px;
}

.method-note h2 {
  max-width: 360px;
  font-size: clamp(27px, 2.5vw, 38px);
  line-height: 1.28;
}

.method-note > p:not(.note-label) {
  max-width: 360px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.82;
}

.text-link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 26px;
  border-bottom: 1px solid var(--accent);
  color: var(--accent);
  font-size: 13px;
}

.method-section,
.section {
  padding-top: clamp(76px, 10vw, 144px);
  padding-bottom: clamp(88px, 11vw, 160px);
  border-top: 1px solid var(--line);
  scroll-margin-top: 76px;
}

.method-section {
  padding-top: clamp(54px, 8vw, 108px);
}

.section-intro,
.section-heading {
  max-width: 1040px;
}

.section-intro h2,
.section-heading h2 {
  max-width: 960px;
  font-size: clamp(34px, 4.5vw, 66px);
  letter-spacing: -0.055em;
  line-height: 1.12;
}

.method-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(28px, 5vw, 72px);
  margin-top: clamp(56px, 8vw, 112px);
}

.preset {
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 25px;
  padding-top: 18px;
  border-top: 1px solid var(--ink);
}

.preset-primary {
  padding-right: clamp(0px, 5vw, 78px);
}

.preset-secondary {
  padding-left: clamp(0px, 4vw, 52px);
  border-left: 1px solid var(--line);
}

.preset-index {
  font-size: 22px;
  letter-spacing: -0.03em;
}

.preset h3 {
  font-size: clamp(27px, 3vw, 42px);
  letter-spacing: -0.05em;
}

.preset-line {
  max-width: 540px;
  margin: 22px 0 0;
  font-size: 17px;
  line-height: 1.72;
}

.preset-line strong {
  display: inline-block;
  min-width: 56px;
  color: var(--muted);
  font-size: 13px;
}

.preset-note {
  max-width: 540px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.method-bottom {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.72fr);
  gap: clamp(42px, 10vw, 150px);
  align-items: start;
  margin-top: 82px;
  padding-top: 22px;
  border-top: 1px solid var(--line-strong);
}

.method-bottom > p {
  max-width: 670px;
  margin: 0;
  font-size: 19px;
  line-height: 1.72;
}

.method-facts {
  margin: 0;
  border-top: 1px solid var(--line);
}

.method-facts > div {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.method-facts dt {
  color: var(--muted);
  font-size: 12px;
}

.method-facts dd {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-bottom: clamp(62px, 8vw, 110px);
}

.section-heading .kicker {
  margin-bottom: 0;
}

.section-lede,
.subsection-lede {
  max-width: var(--measure);
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.84;
}

.section-heading .section-lede {
  margin-top: 18px;
}

.subsection + .subsection {
  margin-top: clamp(92px, 12vw, 178px);
}

.subsection-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--ink);
}

.section-mark {
  flex: 0 0 34px;
  font-size: 13px;
}

.subsection-head h3 {
  font-size: clamp(23px, 2.5vw, 34px);
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.principle-grid article {
  min-height: 188px;
  padding: 21px 24px 24px 0;
  border-bottom: 1px solid var(--line);
}

.principle-grid article + article {
  padding-left: 24px;
  border-left: 1px solid var(--line);
}

.principle-grid h4,
.sample-grid h4,
.setup-list h4,
.record-block h4,
.image-test-grid h4,
.brand-contrast h4,
.recruit-note h4,
.evidence-matrix h4,
.direction-grid h4,
.visual-impact h5,
.two-column-notes h5 {
  font-size: 16px;
}

.principle-grid p,
.sample-grid p,
.setup-list li,
.image-test-grid p,
.brand-contrast p,
.recruit-note p,
.evidence-matrix p,
.direction-grid li,
.two-column-notes p,
.two-column-notes li,
.visual-impact p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.principle-grid p {
  margin: 19px 0 0;
}

.table-wrap {
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scrollbar-color: var(--line-strong) transparent;
}

.conclusion-content,
.evidence-pair {
  max-width: 100%;
  min-width: 0;
}

.boundary-table {
  margin-top: 38px;
}

.boundary-table table,
.judgment-table table,
.evidence-pair table,
.q05-analysis table,
.seven-table,
.record-table {
  min-width: 720px;
  font-size: 13px;
  line-height: 1.65;
}

.boundary-table thead th,
.judgment-table thead th,
.evidence-pair thead th,
.q05-analysis thead th,
.seven-table thead th,
.record-table thead th {
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.boundary-table tbody th,
.judgment-table tbody th,
.evidence-pair tbody th,
.q05-analysis tbody th,
.seven-table tbody th,
.record-table tbody th {
  width: 16%;
  font-size: 13px;
}

.boundary-table tbody td:last-child {
  color: var(--accent);
}

.sample-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(48px, 10vw, 160px);
}

.sample-lead {
  padding-top: 22px;
  border-top: 2px solid var(--accent);
}

.big-number {
  margin: 0;
  font-size: clamp(56px, 7vw, 92px);
  letter-spacing: -0.06em;
  line-height: 0.98;
}

.sample-lead h4 {
  margin-top: 34px;
}

.sample-lead p:last-child {
  max-width: 460px;
  margin: 17px 0 0;
}

.sample-notes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.sample-notes article {
  padding: 20px 20px 0 0;
}

.sample-notes article + article {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.sample-notes p {
  margin: 19px 0 0;
}

.setup-list {
  display: grid;
  grid-template-columns: minmax(180px, 0.42fr) minmax(0, 1.58fr);
  gap: 44px;
  margin-top: 58px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.setup-list ul {
  margin: 0;
}

.setup-list li {
  margin-bottom: 7px;
}

.questions .subsection-lede {
  margin-bottom: 42px;
}

.question {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 34px;
  padding: 28px 0 34px;
  border-top: 1px solid var(--line);
}

.question:last-child {
  border-bottom: 1px solid var(--line);
}

.question-number {
  padding-top: 3px;
  font-size: 20px;
  letter-spacing: -0.03em;
}

.question-body h4 {
  font-size: clamp(20px, 2.1vw, 29px);
}

.question-text {
  max-width: 940px;
  margin: 18px 0 0;
  font-size: 17px;
  line-height: 1.78;
}

details {
  max-width: 940px;
  margin-top: 20px;
}

summary {
  display: inline-block;
  cursor: pointer;
  color: var(--accent);
  font-size: 13px;
  font-weight: 650;
}

summary::marker {
  color: var(--accent);
}

details ul {
  margin-top: 12px;
  padding-left: 1.25em;
}

details li {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.question-note {
  max-width: 940px;
  margin: 20px 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--accent);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.record-block + .record-block {
  margin-top: 45px;
}

.record-block h4 {
  margin-bottom: 16px;
}

.record-table td {
  min-height: 46px;
  height: 50px;
}

.record-table.large-record td {
  height: 100px;
}

.record-table.large-record tr:nth-child(2) td {
  height: 130px;
}

.quote-fields {
  border-top: 1px solid var(--line);
}

.quote-fields p {
  display: grid;
  grid-template-columns: minmax(210px, 0.42fr) minmax(0, 1.58fr);
  gap: 30px;
  min-height: 48px;
  margin: 0;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.quote-fields strong {
  font-size: 13px;
}

.quote-fields span {
  display: block;
  min-height: 22px;
  border-bottom: 1px dotted var(--line-strong);
}

.judgment-table {
  margin-top: 35px;
}

.judgment-table tbody th {
  width: 20%;
}

.judgment-table tbody td:last-child {
  width: 22%;
  color: var(--accent);
  font-weight: 600;
}

.analysis-section {
  background: var(--surface);
}

.analysis-section .subsection + .subsection,
.conversion-section .subsection + .subsection {
  margin-top: clamp(88px, 11vw, 160px);
}

.standard-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 50px;
  max-width: 1040px;
  margin-top: 38px;
  padding-left: 1.6em;
}

.standard-list li {
  min-height: 65px;
  padding: 15px 0 15px 8px;
  border-top: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.7;
}

.standard-list li:nth-child(2) {
  border-top-color: var(--ink);
}

.warning-line {
  max-width: 1040px;
  margin: 26px 0 0;
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  font-size: 14px;
}

.warning-line strong {
  margin-right: 10px;
  color: var(--accent);
}

.conclusions .subsection-head {
  margin-bottom: 48px;
}

.conclusion {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: clamp(34px, 6vw, 100px);
  padding: 34px 0 54px;
  border-top: 1px solid var(--line-strong);
}

.conclusion:last-child {
  padding-bottom: 0;
}

.conclusion-label {
  padding-top: 3px;
}

.conclusion-label span {
  display: block;
  font-size: 28px;
  letter-spacing: -0.05em;
}

.conclusion-label p {
  margin: 9px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.conclusion-content h4 {
  font-size: clamp(26px, 3.3vw, 46px);
  letter-spacing: -0.055em;
}

.core-judgment {
  max-width: 900px;
  margin: 20px 0 0;
  font-size: 19px;
  line-height: 1.78;
}

.evidence-pair {
  margin-top: 30px;
}

.evidence-pair table {
  min-width: 760px;
}

.evidence-pair tbody td:last-child {
  color: var(--muted);
}

.two-column-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 42px;
  margin-top: 34px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.two-column-notes h5,
.visual-impact h5 {
  margin-bottom: 17px;
}

.two-column-notes p,
.two-column-notes ul {
  margin-bottom: 0;
}

.two-column-notes ul {
  padding-left: 1.2em;
}

.two-column-notes li {
  margin-bottom: 6px;
}

.causal-chain {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 17px;
  align-items: center;
  max-width: 1000px;
  margin-top: 35px;
  padding: 18px 20px;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--line);
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.6;
}

.causal-chain b {
  font-size: 20px;
  font-weight: 500;
}

.condition-note {
  max-width: 900px;
  margin: 25px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.82;
}

.visual-impact {
  margin-top: 36px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.visual-impact p {
  max-width: 900px;
  margin-bottom: 0;
}

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

.warning-grid p {
  min-height: 84px;
  margin: 0;
  padding: 18px 16px 18px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.no-conclusion > .subsection-lede {
  margin-top: 26px;
}

.image-test-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.image-test-grid article {
  padding: 20px 20px 0 0;
  min-height: 166px;
}

.image-test-grid article + article {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.image-test-grid p {
  margin: 18px 0 0;
}

.brand-contrast {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(38px, 8vw, 126px);
  margin-top: 56px;
  padding-top: 21px;
  border-top: 1px solid var(--ink);
}

.brand-contrast p {
  margin: 17px 0 0;
}

.recruit-note {
  max-width: 920px;
  margin-top: 50px;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
}

.recruit-note p {
  margin: 18px 0 0;
}

.q05-analysis table {
  min-width: 720px;
}

.q05-analysis .callout {
  max-width: 940px;
  margin: 28px 0 0;
  padding: 18px 20px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  color: var(--ink);
  font-size: 15px;
}

.evidence-matrix {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr) minmax(0, 1fr) minmax(0, 1.3fr);
  border-top: 1px solid var(--line);
}

.evidence-matrix article {
  min-height: 162px;
  padding: 20px 20px 0 0;
}

.evidence-matrix article + article {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.evidence-matrix p {
  margin: 20px 0 0;
}

.seven-table {
  min-width: 760px;
}

.seven-table tbody th {
  width: 19%;
}

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

.direction-grid article {
  padding: 21px 24px 0 0;
}

.direction-grid article + article {
  padding-left: 24px;
  border-left: 1px solid var(--line);
}

.direction-title {
  min-height: 54px;
  margin: 20px 0 0;
  color: var(--ink);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.55;
}

.direction-grid ul {
  margin-top: 17px;
  padding-left: 1.2em;
}

.direction-grid li {
  margin-bottom: 7px;
}

.output-list ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 58px;
  max-width: 1000px;
  margin: 0;
  padding-left: 1.5em;
  border-top: 1px solid var(--line);
}

.output-list li {
  min-height: 61px;
  padding: 15px 0 15px 8px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.7;
}

.keep-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 50px;
  max-width: 1050px;
  margin: 0;
  padding-left: 1.45em;
  border-top: 1px solid var(--line);
}

.keep-list li {
  padding: 15px 0 15px 8px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.72;
}

.closing-statement {
  max-width: 960px;
  margin: 52px 0 0;
  padding-top: 22px;
  border-top: 2px solid var(--accent);
  font-size: clamp(22px, 2.5vw, 35px);
  letter-spacing: -0.04em;
  line-height: 1.45;
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(280px, 0.75fr) minmax(0, 1.25fr);
  gap: 36px 100px;
  padding-top: 72px;
  padding-bottom: 46px;
  border-top: 1px solid var(--line-strong);
}

.site-footer h2 {
  margin-top: 18px;
  font-size: clamp(24px, 3vw, 40px);
}

.site-footer > p:not(.footer-meta) {
  max-width: 650px;
  margin: 50px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.footer-meta {
  grid-column: 1 / -1;
  margin: 42px 0 0;
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 1050px) {
  .hero {
    grid-template-columns: minmax(0, 1.2fr) minmax(240px, 0.8fr);
    gap: 52px;
  }

  .principle-grid,
  .image-test-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .principle-grid article:nth-child(3),
  .image-test-grid article:nth-child(3) {
    padding-left: 0;
    border-left: 0;
  }

  .principle-grid article:nth-child(n + 3),
  .image-test-grid article:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .principle-grid article:nth-child(even),
  .image-test-grid article:nth-child(even) {
    padding-left: 24px;
    border-left: 1px solid var(--line);
  }

  .sample-grid {
    grid-template-columns: minmax(220px, 0.58fr) minmax(0, 1.42fr);
    gap: 48px;
  }

  .sample-notes {
    grid-template-columns: 1fr;
  }

  .sample-notes article {
    min-height: 0;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--line);
  }

  .sample-notes article + article {
    padding-left: 0;
    border-left: 0;
  }

  .evidence-matrix {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .evidence-matrix article:nth-child(3) {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .evidence-matrix article:nth-child(4) {
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 760px) {
  :root {
    --gutter: 16px;
  }

  body {
    font-size: 15px;
  }

  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
    min-height: 74px;
    padding-top: 12px;
    padding-bottom: 10px;
  }

  .site-nav {
    justify-content: flex-start;
    gap: 6px 18px;
    font-size: 12px;
  }

  .hero {
    display: block;
    min-height: 0;
    padding-top: 72px;
    padding-bottom: 84px;
  }

  .hero h1 {
    max-width: 620px;
    font-size: clamp(42px, 13vw, 64px);
  }

  .hero-lede {
    margin-top: 30px;
    font-size: 17px;
  }

  .hero-meta {
    display: grid;
    gap: 5px;
    margin-top: 26px;
  }

  .method-note {
    margin-top: 74px;
    padding: 18px 0 0;
    border-left: 0;
  }

  .note-label {
    margin-bottom: 26px;
  }

  .method-note h2 {
    max-width: 530px;
    font-size: 29px;
  }

  .method-section,
  .section {
    padding-top: 74px;
    padding-bottom: 92px;
  }

  .section-intro h2,
  .section-heading h2 {
    font-size: 38px;
  }

  .section-heading {
    margin-bottom: 62px;
  }

  .section-lede,
  .subsection-lede {
    font-size: 15px;
  }

  .method-grid,
  .method-bottom,
  .sample-grid,
  .setup-list,
  .conclusion,
  .brand-contrast,
  .two-column-notes,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .method-grid {
    gap: 48px;
    margin-top: 58px;
  }

  .preset,
  .preset-secondary {
    padding-left: 0;
    padding-right: 0;
    border-left: 0;
  }

  .preset-secondary {
    padding-top: 24px;
    border-top: 1px solid var(--line-strong);
  }

  .preset-line {
    font-size: 16px;
  }

  .method-bottom {
    gap: 36px;
    margin-top: 66px;
  }

  .method-bottom > p {
    font-size: 17px;
  }

  .principle-grid,
  .image-test-grid,
  .warning-grid,
  .direction-grid,
  .output-list ol,
  .keep-list {
    grid-template-columns: 1fr;
  }

  .principle-grid article,
  .principle-grid article + article,
  .image-test-grid article,
  .image-test-grid article + article,
  .direction-grid article,
  .direction-grid article + article {
    min-height: 0;
    padding: 18px 0 22px;
    border-top: 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    border-left: 0;
  }

  .principle-grid article:first-child,
  .image-test-grid article:first-child,
  .direction-grid article:first-child {
    border-top: 0;
  }

  .setup-list {
    gap: 18px;
    margin-top: 46px;
  }

  .question {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 16px;
    padding-top: 23px;
    padding-bottom: 28px;
  }

  .question-number {
    font-size: 18px;
  }

  .question-body h4 {
    font-size: 21px;
  }

  .question-text {
    font-size: 16px;
  }

  .table-wrap {
    margin-right: -8px;
    margin-left: -8px;
    padding-right: 8px;
    padding-left: 8px;
  }

  th,
  td {
    padding: 11px 12px;
  }

  .conclusion {
    gap: 16px;
    padding-top: 28px;
    padding-bottom: 44px;
  }

  .conclusion-label {
    display: flex;
    align-items: baseline;
    gap: 9px;
  }

  .conclusion-label span {
    font-size: 22px;
  }

  .conclusion-label p {
    margin-top: 0;
  }

  .conclusion-content h4 {
    font-size: 30px;
  }

  .core-judgment {
    font-size: 17px;
  }

  .causal-chain {
    grid-template-columns: 1fr;
    gap: 7px;
    padding: 16px;
  }

  .causal-chain b {
    transform: rotate(90deg);
    justify-self: center;
  }

  .warning-grid p {
    min-height: 0;
    padding: 14px 0;
  }

  .brand-contrast {
    gap: 32px;
  }

  .direction-title {
    min-height: 0;
  }

  .output-list ol,
  .keep-list {
    gap: 0;
  }

  .closing-statement {
    margin-top: 38px;
    font-size: 26px;
  }

  .site-footer {
    gap: 30px;
    padding-top: 60px;
  }

  .site-footer > p:not(.footer-meta) {
    margin-top: 0;
  }
}

@media print {
  :root {
    --paper: #ffffff;
    --surface: #ffffff;
    --ink: #111111;
    --muted: #444444;
    --line: #bbbbbb;
    --line-strong: #555555;
    --accent: #111111;
    --accent-soft: #f1f1f1;
  }

  html {
    scroll-behavior: auto;
  }

  body {
    overflow: visible;
    font-size: 10.5pt;
  }

  .skip-link,
  .site-header,
  .text-link {
    display: none;
  }

  .wrap {
    width: auto;
    margin-right: 18mm;
    margin-left: 18mm;
  }

  .hero {
    display: block;
    min-height: 0;
    padding-top: 18mm;
    padding-bottom: 16mm;
  }

  .hero h1 {
    max-width: 170mm;
    font-size: 31pt;
  }

  .hero-lede {
    max-width: 140mm;
    font-size: 13pt;
  }

  .method-note {
    margin-top: 14mm;
    padding-left: 0;
    border-left: 0;
  }

  .method-grid,
  .principle-grid,
  .sample-grid,
  .image-test-grid,
  .direction-grid,
  .evidence-matrix {
    break-inside: avoid;
  }

  .section,
  .method-section {
    padding-top: 14mm;
    padding-bottom: 14mm;
    scroll-margin-top: 0;
  }

  .subsection,
  .question,
  .conclusion,
  .record-block {
    break-inside: avoid;
  }

  .table-wrap {
    overflow: visible;
  }

  table {
    min-width: 0 !important;
    font-size: 8.5pt !important;
  }

  .site-footer {
    margin-top: 12mm;
    padding-top: 12mm;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}