:root {
  color-scheme: light;
  --ink: #17211f;
  --muted: #596461;
  --line: #b9c0bc;
  --light: #e8ebe8;
  --paper: #d9d7cf;
  --forest: #173c33;
  --forest-soft: #cddbd3;
  --wine: #8b263b;
  --wine-soft: #ead7dc;
  --test-blue: #1c3045;
  --signal: #f6c83d;
  --white: #f5f6f3;
  --page-x: clamp(24px, 6vw, 96px);
  --content: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--light);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}

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

.site-header {
  position: absolute;
  z-index: 10;
  top: 0;
  right: 0;
  left: 0;
}

.nav-shell,
.wide-shell,
.split-shell,
.footer-shell {
  width: min(calc(100% - (2 * var(--page-x))), var(--content));
  margin-inline: auto;
}

.nav-shell {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  font-weight: 700;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 38px);
  color: var(--muted);
  font-size: 14px;
}

.youtube-icon-link {
  width: 40px;
  height: 40px;
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: opacity 160ms ease, transform 160ms ease;
}

.youtube-brand-icon {
  width: 24px;
  height: auto;
  aspect-ratio: 396 / 277.403;
  display: block;
}

.youtube-icon-link:hover {
  opacity: .8;
  transform: translateY(-1px);
}

.youtube-icon-link:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 3px;
}

.nav-links a:hover,
.text-link:hover,
.footer a:hover {
  color: var(--wine);
}

.section-light {
  background: var(--light);
}

.section-dark {
  color: var(--white);
  background: var(--forest);
}

.section-paper {
  background: var(--paper);
}

.section-accent {
  color: #361019;
  background: var(--wine-soft);
}

.hero {
  position: relative;
  min-height: min(900px, 96svh);
  padding: 152px var(--page-x) 96px;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.hero::before,
.hero::after {
  position: absolute;
  content: "";
  pointer-events: none;
}

.hero::before {
  width: clamp(150px, 17vw, 260px);
  height: 1px;
  top: 31%;
  left: 0;
  background: var(--wine);
}

.hero::after {
  width: 1px;
  height: clamp(110px, 17vh, 180px);
  right: 8vw;
  bottom: 0;
  background: var(--forest);
}

.hero-inner {
  width: min(100%, 1120px);
  text-align: center;
}

.hero-thesis {
  margin: 0 0 18px;
  color: var(--forest);
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 600;
  line-height: 1.4;
}

.eyebrow,
.section-index {
  margin: 0 0 28px;
  color: var(--wine);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.section-dark .section-index {
  color: #a8c9b8;
}

.section-accent .section-index {
  color: var(--wine);
}

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

h1 {
  max-width: 1120px;
  margin: 0 auto;
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: clamp(52px, 7vw, 104px);
  font-weight: 600;
  line-height: 1.07;
}

.hero-title-line {
  display: block;
}

.hero-title-question > span {
  display: inline;
}

.hero-copy {
  max-width: 700px;
  margin: 0 auto 64px;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.85;
}

.hero-actions {
  margin-top: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
}

.button {
  min-height: 52px;
  padding: 0 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  border-radius: 2px;
  font-size: 15px;
  font-weight: 700;
  transition: transform 160ms ease, background-color 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: var(--white);
  border-color: var(--forest);
  background: var(--forest);
}

.button-primary:hover {
  background: #0f2e27;
}

.button-outline-light {
  color: var(--white);
  border-color: rgba(245, 246, 243, .72);
  background: transparent;
}

.button-outline-light:hover {
  color: var(--forest);
  background: var(--white);
}

.text-link {
  padding-block: 10px;
  border-bottom: 1px solid currentColor;
  font-size: 14px;
}

.hero-facts {
  width: min(100%, 720px);
  margin: 68px auto 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.hero-facts div {
  padding: 18px 22px;
}

.hero-facts div + div {
  border-left: 1px solid var(--line);
}

.hero-facts dt {
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 12px;
}

.hero-facts dd {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
}

.scroll-cue {
  position: absolute;
  bottom: 28px;
  left: 50%;
  display: flex;
  gap: 10px;
  color: var(--muted);
  font-size: 12px;
  transform: translateX(-50%);
}

.narrow-shell {
  width: min(calc(100% - (2 * var(--page-x))), 920px);
  margin-inline: auto;
}

.reframe {
  min-height: 78svh;
  padding: clamp(110px, 16vw, 220px) var(--page-x);
  display: grid;
  align-items: center;
}

.reframe .narrow-shell {
  width: min(100%, 920px);
}

.statement {
  margin-bottom: 42px;
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: clamp(38px, 6.2vw, 82px);
  font-weight: 600;
  line-height: 1.25;
}

.statement > span {
  display: block;
}

.statement-support {
  max-width: 690px;
  margin: 0 0 0 auto;
  color: var(--forest-soft);
  font-size: clamp(16px, 1.8vw, 21px);
  line-height: 1.9;
}

.decision-block {
  width: min(100%, 680px);
  margin: clamp(80px, 12vw, 150px) 0 0 auto;
  padding-top: 42px;
  border-top: 1px solid rgba(245, 246, 243, .28);
}

.decision-question,
.decision-answer {
  margin-bottom: 0;
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: clamp(36px, 5vw, 66px);
  font-weight: 600;
  line-height: 1.25;
}

.decision-answer {
  color: #d8e8df;
}

.decision-note {
  margin: 30px 0 34px;
  color: var(--forest-soft);
  font-size: 18px;
  line-height: 1.85;
}

.test-preview {
  padding: clamp(70px, 9vw, 120px) 0;
  color: #f2f5f7;
  background: var(--test-blue);
}

.test-preview .section-index {
  color: #9fc9d6;
}

.test-preview-heading {
  margin-bottom: 70px;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, .7fr);
  align-items: end;
  gap: clamp(48px, 9vw, 130px);
}

.test-preview-heading h2 {
  margin-bottom: 0;
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: clamp(42px, 6vw, 78px);
  font-weight: 600;
  line-height: 1.18;
}

.test-preview-intro p {
  margin-bottom: 28px;
  color: #bfccd5;
  font-size: 17px;
  line-height: 1.85;
}

.button-signal {
  color: #2c260f;
  border-color: var(--signal);
  background: var(--signal);
}

.button-signal:hover {
  background: #ffd75d;
}

.test-preview-embed {
  width: min(100%, 680px);
  margin-inline: auto;
  background: transparent;
}

.test-preview-card,
.test-preview-card img {
  width: 100%;
  display: block;
}

.test-preview-card {
  position: relative;
  cursor: pointer;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
  transition: transform 180ms ease;
}

.test-preview-card::after {
  position: absolute;
  z-index: 2;
  inset: 0;
  content: "";
}

.test-preview-card:hover {
  transform: translateY(-4px);
}

.test-preview-card img {
  height: auto;
  pointer-events: none;
  -webkit-user-drag: none;
  -webkit-user-select: none;
  user-select: none;
}

.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;
}

.questions {
  padding: clamp(110px, 14vw, 190px) 0;
}

.section-heading {
  max-width: 880px;
  margin-bottom: 90px;
}

.section-heading h2,
.report-copy h2,
.final-inner h2 {
  margin-bottom: 0;
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: clamp(42px, 6vw, 80px);
  font-weight: 600;
  line-height: 1.2;
}

.question-list {
  border-top: 1px solid var(--line);
}

.question-row {
  min-height: 220px;
  padding: 42px 0;
  display: grid;
  grid-template-columns: minmax(72px, 1fr) minmax(0, 3fr);
  align-items: start;
  border-bottom: 1px solid var(--line);
}

.question-number {
  color: var(--wine);
  font-family: Georgia, serif;
  font-size: clamp(26px, 3vw, 42px);
}

.question-row h3 {
  margin-bottom: 18px;
  font-size: clamp(28px, 4vw, 50px);
  font-weight: 600;
  line-height: 1.25;
}

.question-row p {
  max-width: 680px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.85;
}

.report {
  padding: clamp(100px, 13vw, 170px) 0;
}

.split-shell {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(420px, .8fr);
  align-items: center;
  gap: clamp(60px, 9vw, 140px);
}

.report-copy h2 {
  font-size: clamp(40px, 5vw, 68px);
}

.report-heading-line {
  display: block;
}

.mobile-only {
  display: none;
}

.report-copy > p:not(.section-index) {
  max-width: 600px;
  margin: 36px 0 0;
  color: #4f5552;
  font-size: 18px;
  line-height: 1.9;
}

.report-copy .report-emphasis {
  margin-top: 8px;
  display: block;
  color: var(--ink);
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: clamp(27px, 3.2vw, 42px);
  font-weight: 600;
  line-height: 1.55;
}

.report-copy .button {
  margin-top: 42px;
}

.report-window {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(23, 33, 31, .26);
  background: #eef0ed;
  box-shadow: 24px 30px 0 rgba(23, 60, 51, .14);
}

.report-window-hero {
  min-height: 300px;
  padding: clamp(26px, 4vw, 46px);
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(150px, .65fr);
  align-items: center;
  gap: 26px;
  color: #eff4f1;
  background: var(--forest);
}

.report-window-copy {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.report-window-copy span,
.report-window-copy small,
.report-window-score span,
.report-window-score small {
  color: #b5c9c0;
  font-size: 11px;
}

.report-window-copy > strong {
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: clamp(24px, 3vw, 39px);
  line-height: 1.25;
}

.report-window-score {
  min-height: 210px;
  padding: 24px 0;
  display: grid;
  align-content: center;
  border-top: 1px solid rgba(255, 255, 255, .28);
  border-bottom: 1px solid rgba(255, 255, 255, .28);
}

.report-window-score strong {
  color: var(--signal);
  font-family: Georgia, serif;
  font-size: clamp(72px, 8vw, 112px);
  font-weight: 400;
  line-height: .95;
}

.report-window-score small {
  justify-self: end;
}

.report-window-score b {
  margin-top: 16px;
  font-size: 15px;
}

.report-window-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  color: #eff4f1;
  background: var(--forest);
  border-top: 1px solid rgba(255, 255, 255, .2);
}

.report-window-summary div {
  min-height: 112px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 7px;
}

.report-window-summary div + div {
  border-left: 1px solid rgba(255, 255, 255, .2);
}

.report-window-summary span,
.report-window-summary small {
  color: #aebfb7;
  font-size: 9px;
}

.report-window-summary strong {
  font-size: 15px;
}

.report-window-focus {
  padding: clamp(30px, 4vw, 48px);
}

.report-window-focus > span {
  color: var(--wine);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
}

.report-window-focus > strong {
  margin: 18px 0 30px;
  display: block;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(24px, 3vw, 36px);
}

.report-window-focus ol {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.report-window-focus li {
  min-height: 76px;
  display: grid;
  grid-template-columns: 42px 1fr auto;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--line);
}

.report-window-focus li b,
.report-window-focus li small {
  color: var(--wine);
  font-size: 10px;
}

.report-window-focus li em {
  font-style: normal;
  font-weight: 700;
}

.report-layout-stacked .split-shell {
  grid-template-columns: 1fr;
  gap: clamp(70px, 9vw, 120px);
}

.report-layout-stacked .report-copy {
  width: min(100%, 1100px);
}

.report-layout-stacked .report-copy h2 {
  max-width: 1100px;
  font-size: clamp(46px, 5.5vw, 72px);
}

.report-layout-stacked .report-copy > p:not(.section-index) {
  max-width: 760px;
}

.report-layout-stacked .report-window {
  width: min(100%, 1080px);
  margin-inline: auto;
}

.report-layout-stacked .report-window-hero {
  min-height: 390px;
  grid-template-columns: minmax(0, 1.35fr) minmax(240px, .65fr);
  padding: clamp(42px, 6vw, 76px);
}

.report-layout-stacked .report-window-summary div {
  min-height: 132px;
  padding: 28px 34px;
}

.report-layout-stacked .report-window-focus {
  padding: clamp(44px, 6vw, 72px);
}

.plain-list {
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid #aaa99f;
}

.plain-list li {
  padding: 18px 0;
  border-bottom: 1px solid #aaa99f;
  font-weight: 700;
}

.report-sheet {
  margin: 0;
  padding: clamp(24px, 4vw, 52px);
  background: var(--white);
  box-shadow: 24px 30px 0 rgba(23, 60, 51, .14);
  transform: rotate(1.5deg);
}

.report-sheet figcaption {
  margin-bottom: 48px;
  color: #69716e;
  font-size: 11px;
  letter-spacing: .1em;
}

.report-title {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-bottom: 28px;
  border-bottom: 2px solid var(--ink);
}

.report-title span {
  font-size: 13px;
}

.report-title strong {
  font-family: "Songti SC", "STSong", serif;
  font-size: 31px;
}

.report-score {
  padding: 30px 0;
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 20px;
  align-items: end;
  border-bottom: 1px solid #c7cbc7;
}

.report-score span {
  color: #69716e;
  font-size: 12px;
}

.report-score strong {
  color: var(--forest);
  font-size: 26px;
  line-height: 1.35;
}

.report-bars {
  padding: 26px 0 6px;
}

.report-bars div {
  margin-bottom: 21px;
  display: grid;
  grid-template-columns: 82px 1fr;
  align-items: center;
  gap: 18px;
  font-size: 12px;
}

.report-bars i {
  position: relative;
  height: 5px;
  display: block;
  background: #d8ddda;
}

.report-bars i::after {
  position: absolute;
  content: "";
  inset: 0 auto 0 0;
  width: var(--value);
  background: var(--wine);
}

.report-note {
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px solid #c7cbc7;
  color: #69716e;
  font-size: 12px;
  line-height: 1.7;
}

.difference {
  padding: clamp(110px, 14vw, 190px) 0;
}

.compact-heading {
  max-width: 980px;
}

.difference-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(54, 16, 25, .35);
}

.difference-grid article {
  min-height: 300px;
  padding: 34px 34px 28px 0;
}

.difference-grid article + article {
  padding-left: 34px;
  border-left: 1px solid rgba(54, 16, 25, .35);
}

.difference-grid span {
  display: block;
  margin-bottom: 68px;
  font-family: Georgia, serif;
  font-size: 18px;
}

.difference-grid h3 {
  margin-bottom: 18px;
  font-size: 24px;
}

.difference-grid p {
  margin-bottom: 0;
  color: #6b3d47;
  line-height: 1.8;
}

.final-cta {
  min-height: 78svh;
  padding: clamp(110px, 16vw, 210px) var(--page-x);
  display: grid;
  place-items: center;
  text-align: center;
}

.final-inner h2 {
  margin-bottom: 76px;
  font-size: clamp(48px, 7vw, 92px);
}

.final-inner h2 span {
  display: block;
}

.final-inner > p.final-boundary {
  max-width: 720px;
  margin: 0 auto 104px;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.9;
}

.footer {
  color: #d7dfda;
  background: #102720;
}

.footer-shell {
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  font-size: 13px;
}

.footer-shell div {
  display: flex;
  align-items: center;
  gap: 24px;
}

@media (max-width: 820px) {
  .nav-shell {
    min-height: 72px;
  }

  .brand span {
    display: none;
  }

  .nav-links {
    gap: 18px;
  }

  .hero {
    min-height: 840px;
    padding-top: 126px;
  }

  .hero::before {
    width: 80px;
  }

  .hero-facts {
    width: 100%;
  }

  .split-shell {
    grid-template-columns: 1fr;
  }

  .test-preview-heading {
    grid-template-columns: 1fr;
  }

  .report-sheet {
    width: min(100%, 560px);
    margin-inline: auto;
  }

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

  .difference-grid article {
    min-height: 0;
    padding: 30px 0 42px;
    border-bottom: 1px solid rgba(54, 16, 25, .35);
  }

  .difference-grid article + article {
    padding-left: 0;
    border-left: 0;
  }

  .difference-grid span {
    margin-bottom: 34px;
  }
}

@media (max-width: 560px) {
  :root {
    --page-x: 22px;
  }

  .hero {
    min-height: 780px;
    padding-bottom: 72px;
  }

  h1 {
    font-size: clamp(44px, 14vw, 62px);
  }

  .hero-title-question > span {
    display: block;
    white-space: nowrap;
  }

  .hero-copy {
    font-size: 17px;
    line-height: 1.75;
  }

  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }

  .hero-facts {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .hero-facts div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 13px 4px;
  }

  .hero-facts div + div {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .hero-facts dt {
    margin-bottom: 0;
  }

  .scroll-cue {
    display: none;
  }

  .reframe {
    min-height: auto;
  }

  .statement {
    display: grid;
    gap: 12px;
    font-size: clamp(29px, 9.2vw, 36px);
    line-height: 1.2;
  }

  .decision-answer {
    margin-top: 10px;
  }

  .section-heading {
    margin-bottom: 54px;
  }

  .question-row {
    min-height: 0;
    grid-template-columns: 52px 1fr;
  }

  .question-row p {
    font-size: 15px;
  }

  .report-sheet {
    box-shadow: 10px 14px 0 rgba(23, 60, 51, .14);
    transform: none;
  }

  .report-layout-stacked .report-copy h2 {
    font-size: clamp(27px, 8vw, 34px);
    line-height: 1.28;
  }

  .report-heading-logic,
  .report-heading-rest {
    display: block;
  }

  .report-layout-stacked .report-window {
    box-shadow: 10px 14px 0 rgba(23, 60, 51, .14);
  }

  .report-layout-stacked .report-window-hero {
    min-height: 0;
    padding: 30px 24px;
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .report-window-copy > strong {
    font-size: 28px;
  }

  .report-window-score {
    min-height: 170px;
    padding: 24px 0;
  }

  .report-window-score strong {
    font-size: 82px;
  }

  .report-window-summary {
    grid-template-columns: 1fr;
  }

  .report-layout-stacked .report-window-summary div {
    min-height: 96px;
    padding: 20px 24px;
  }

  .report-window-summary div + div {
    border-top: 1px solid rgba(255, 255, 255, .2);
    border-left: 0;
  }

  .report-layout-stacked .report-window-focus {
    padding: 32px 24px;
  }

  .report-window-focus li {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 8px 12px;
    padding: 18px 0;
  }

  .report-window-focus li small {
    grid-column: 2;
  }

  .mobile-only {
    display: inline;
  }

  .final-inner > p.final-boundary {
    margin-bottom: 58px;
  }

  .final-inner h2 {
    margin-bottom: 48px;
    font-size: clamp(34px, 10vw, 40px);
    line-height: 1.25;
  }

  .final-inner h2 span {
    white-space: nowrap;
  }

  .report-score {
    grid-template-columns: 1fr;
  }

  .report-bars div {
    grid-template-columns: 70px 1fr;
  }

  .footer-shell {
    padding-block: 34px;
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-shell > div {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, max-content);
    align-items: center;
    justify-content: start;
    gap: 14px 24px;
  }
}

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

  .button {
    transition: none;
  }

  .test-preview-card {
    transition: none;
  }
}