:root {
  color-scheme: dark;
  --bg: #070b17;
  --surface: #0d1425;
  --surface-raised: #111a2e;
  --line: rgba(166, 155, 230, 0.2);
  --line-strong: rgba(172, 160, 244, 0.42);
  --text: #f4f3fb;
  --text-soft: #b9bfd4;
  --text-muted: #818aa7;
  --accent: #a796ff;
  --accent-soft: #d1caff;
  font-family: Inter, Geist, "SF Pro Display", "PingFang SC", "Noto Sans SC", system-ui, sans-serif;
  background: var(--bg);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.story-topbar {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  min-height: 66px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
  padding: 10px max(24px, calc((100vw - 1180px) / 2));
  background: rgba(7, 11, 23, 0.94);
  backdrop-filter: blur(18px);
}

.story-back,
.story-footer a {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0 16px;
  color: var(--accent-soft);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.story-back:hover,
.story-footer a:hover,
.story-back:focus-visible,
.story-footer a:focus-visible {
  border-color: var(--accent);
  color: #fff;
  outline: none;
}

.story-nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.story-nav a {
  color: var(--text-muted);
  font-size: 12px;
  text-decoration: none;
  transition: color 160ms ease;
}

.story-nav a:hover,
.story-nav a:focus-visible {
  color: var(--text);
  outline: none;
}

.story-page {
  width: min(calc(100% - 48px), 1180px);
  margin: 0 auto;
  padding: 72px 0 48px;
}

.story-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr);
  gap: clamp(40px, 7vw, 96px);
  align-items: end;
  min-height: 520px;
  border-bottom: 1px solid var(--line);
  padding: 52px 0 72px;
}

.story-kicker,
.module-index,
.section-title > span,
.story-meta dt,
.story-concept span,
.story-footer span {
  margin: 0;
  color: var(--accent);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.story-hero h1 {
  max-width: 760px;
  margin: 22px 0 8px;
  font-size: clamp(58px, 7vw, 94px);
  font-weight: 760;
  line-height: 0.96;
  letter-spacing: -0.045em;
}

.story-subtitle {
  margin: 0;
  color: var(--text-soft);
  font-size: clamp(20px, 2vw, 28px);
  line-height: 1.5;
}

.story-meta {
  display: flex;
  gap: 48px;
  margin: 52px 0 0;
}

.story-meta div {
  display: grid;
  gap: 8px;
}

.story-meta dd {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
}

.story-concept {
  margin: 0;
  border: 1px solid var(--line-strong);
  border-radius: 24px;
  padding: clamp(28px, 4vw, 46px);
  background: var(--surface-raised);
}

.story-concept p {
  margin: 22px 0 0;
  font-size: clamp(20px, 2.2vw, 30px);
  font-weight: 650;
  line-height: 1.65;
}

.story-section {
  scroll-margin-top: 92px;
  border-bottom: 1px solid var(--line);
  padding: 96px 0;
}

.section-title {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  align-items: end;
  gap: 24px;
  margin-bottom: 42px;
}

.section-title h2 {
  margin: 0;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1;
  letter-spacing: -0.035em;
}

.origin-grid,
.future-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  gap: 24px;
}

.long-copy,
.thinking-note,
.memory-case,
.story-ending {
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: clamp(26px, 4vw, 46px);
  background: var(--surface);
}

.long-copy p,
.thinking-note p,
.memory-copy p,
.future-section p {
  margin: 0;
  color: var(--text-soft);
  font-size: 17px;
  line-height: 1.9;
}

.long-copy p + p,
.memory-copy p + p {
  margin-top: 18px;
}

.thinking-note {
  border-color: var(--line-strong);
  background: var(--surface-raised);
}

.thinking-note strong {
  display: block;
  margin-bottom: 24px;
  color: var(--accent-soft);
  font-size: 14px;
  letter-spacing: 0.08em;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.concept-grid article,
.ai-grid article {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 28px;
  background: var(--surface);
}

.concept-grid h3,
.ai-grid h3,
.memory-case h3 {
  margin: 18px 0 14px;
  font-size: 24px;
}

.concept-grid article > p:not(.module-index),
.ai-grid p {
  margin: 0;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.8;
}

.concept-grid article > p + p {
  margin-top: 12px;
}

.experience-flow {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.experience-flow.six-step {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.experience-flow li {
  min-height: 190px;
  border-top: 1px solid var(--line-strong);
  border-right: 1px solid var(--line);
  padding: 22px 16px;
}

.experience-flow li:last-child {
  border-right: 0;
}

.experience-flow span {
  display: block;
  margin-bottom: 44px;
  color: var(--accent);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 12px;
}

.experience-flow strong {
  display: block;
  font-size: 14px;
  line-height: 1.6;
}

.experience-flow p {
  margin: 12px 0 0;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.65;
}

.persona-model,
.data-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.72fr) minmax(0, 1.28fr);
  gap: 20px;
}

.persona-statement,
.data-note,
.model-result {
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  padding: 30px;
  background: var(--surface-raised);
}

.persona-statement p,
.data-note p,
.model-result {
  margin: 0;
  color: var(--text-soft);
  font-size: 18px;
  line-height: 1.75;
}

.persona-statement p + p,
.data-note p + p {
  margin-top: 14px;
  color: var(--accent-soft);
}

.trait-grid,
.data-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.trait-grid li,
.data-grid li {
  min-height: 58px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
  color: var(--text-soft);
  background: var(--surface);
}

.model-result {
  margin-top: 20px;
  text-align: center;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.capability-grid article {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 28px;
  background: var(--surface);
}

.capability-grid h3 {
  margin: 18px 0 12px;
  font-size: 22px;
}

.capability-grid article > p:not(.module-index),
.capability-grid blockquote {
  margin: 0;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.75;
}

.capability-grid blockquote {
  border-left: 2px solid var(--accent);
  padding-left: 18px;
}

.capability-grid .capability-wide {
  display: grid;
  grid-column: span 2;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: 42px;
  align-items: center;
  border-color: var(--line-strong);
  background: var(--surface-raised);
}

.data-layout {
  align-items: stretch;
}

.data-grid {
  margin: 0;
}

.data-grid li:last-child {
  grid-column: span 2;
}

.data-note {
  display: flex;
  justify-content: center;
  flex-direction: column;
}

.compact-grid,
.world-grid,
.output-grid {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
}

.compact-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: 20px 0 26px;
}

.compact-grid li {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  color: var(--text-soft);
  font-size: 13px;
  text-align: center;
}

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

.showroom-statement p {
  min-height: 132px;
  margin: 0;
  border-right: 1px solid var(--line);
  padding: 28px;
  color: var(--text-soft);
  font-size: 18px;
  line-height: 1.65;
}

.showroom-statement p:last-child {
  border-right: 0;
}

.showroom-statement span,
.output-grid span {
  display: block;
  margin-bottom: 28px;
  color: var(--accent);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 12px;
}

.world-label {
  margin-top: 42px;
}

.world-grid,
.output-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.world-grid li,
.output-grid li {
  min-height: 86px;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
  color: var(--text-soft);
  background: var(--surface);
}

.more-intro,
.personalization-intro {
  margin: 0 0 28px;
  color: var(--text-soft);
  font-size: 18px;
  line-height: 1.75;
}

.more-intro p {
  margin: 0;
}

.more-intro p + p {
  margin-top: 8px;
  color: var(--accent-soft);
}

.output-grid {
  margin-top: 0;
}

.output-grid span {
  margin-bottom: 20px;
}

.personalization-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.personalization-grid article {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 28px;
  background: var(--surface);
}

.personalization-grid h3 {
  margin: 18px 0 12px;
  font-size: 22px;
}

.personalization-grid article > p:last-child {
  margin: 0;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.75;
}

.personalization-question {
  margin: 18px 0 0;
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  padding: 30px;
  background: var(--surface-raised);
}

.personalization-question p {
  margin: 0;
  color: var(--text-soft);
  font-size: 18px;
  line-height: 1.75;
}

.personalization-question p + p {
  margin-top: 10px;
  color: var(--accent-soft);
}

.origin-mini-flow {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.origin-mini-flow li {
  min-height: 82px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  color: var(--text-soft);
  font-size: 13px;
  line-height: 1.5;
  background: var(--surface);
}

.origin-mini-flow span {
  display: block;
  margin-bottom: 16px;
  color: var(--accent);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 11px;
}

.responsibility-split,
.difference-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.responsibility-split article,
.difference-grid article {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 30px;
  background: var(--surface);
}

.responsibility-split article:last-child,
.difference-grid article:last-child {
  border-color: var(--line-strong);
  background: var(--surface-raised);
}

.responsibility-split h3,
.difference-grid h3 {
  margin: 18px 0 0;
  font-size: 24px;
}

.experience-flow.nine-step {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.experience-flow.nine-step li {
  min-height: 132px;
  border: 1px solid var(--line);
  border-radius: 16px;
}

.experience-flow.nine-step span {
  margin-bottom: 24px;
}

.agent-examples {
  margin-top: 0;
}

.difference-grid {
  margin-top: 0;
}

.difference-grid p:last-child {
  margin: 14px 0 0;
  color: var(--text-soft);
  font-size: 17px;
  line-height: 1.75;
}

.difference-result {
  margin: 18px 0 0;
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  padding: 30px;
  text-align: center;
  background: var(--surface-raised);
}

.difference-result p {
  margin: 0;
  color: var(--text-soft);
  font-size: 20px;
  line-height: 1.7;
}

.difference-result p + p {
  margin-top: 8px;
  color: var(--accent-soft);
}

.archive-thesis {
  border-left: 2px solid var(--accent);
  padding: 12px 0 12px 28px;
}

.archive-thesis p {
  margin: 0;
  color: var(--text-soft);
  font-size: clamp(20px, 2.6vw, 34px);
  line-height: 1.65;
}

.archive-thesis p + p {
  margin-top: 8px;
}

.archive-thesis strong {
  color: var(--accent-soft);
}

.world-grid.archive-materials,
.world-grid.reconstruction-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.experience-flow.eight-step {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.experience-flow.eight-step li {
  min-height: 142px;
  border: 1px solid var(--line);
  border-radius: 16px;
}

.experience-flow.eight-step span {
  margin-bottom: 24px;
}

.archive-case {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(34px, 6vw, 80px);
  border: 1px solid var(--line-strong);
  border-radius: 22px;
  padding: clamp(28px, 4vw, 46px);
  background: var(--surface-raised);
}

.archive-case h3 {
  margin: 18px 0 14px;
  font-size: 28px;
}

.archive-case-intro > p:last-child,
.archive-evidence p {
  margin: 0;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.75;
}

.archive-evidence blockquote {
  margin: 0 0 22px;
  border-left: 2px solid var(--accent);
  padding-left: 20px;
  color: var(--accent-soft);
  font-size: 22px;
  line-height: 1.7;
}

.archive-evidence p + p {
  margin-top: 8px;
}

.reconstruction-note {
  margin-top: 18px;
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  padding: 30px;
  background: var(--surface-raised);
}

.reconstruction-note blockquote {
  margin: 18px 0 0;
  color: var(--accent-soft);
  font-size: 26px;
  font-weight: 650;
  line-height: 1.6;
}

.preserve-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.preserve-grid li {
  min-height: 76px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
  color: var(--text-soft);
  background: var(--surface);
}

.preserve-room {
  margin: 18px 0 0;
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  padding: 24px;
  color: var(--accent-soft);
  font-size: 20px;
  text-align: center;
  background: var(--surface-raised);
}

.memory-case {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(34px, 6vw, 80px);
  align-items: start;
  border-color: var(--line-strong);
}

.memory-time {
  margin: 0;
  color: var(--text-muted);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 12px;
  letter-spacing: 0.06em;
}

.ai-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.ai-grid h3 {
  margin-top: 0;
  font-size: 20px;
}

.question-list {
  margin: 0;
  border-top: 1px solid var(--line);
  padding: 0;
  list-style: none;
  counter-reset: question;
}

.question-list li {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 20px;
  border-bottom: 1px solid var(--line);
  padding: 24px 0;
  color: var(--text-soft);
  font-size: clamp(17px, 1.8vw, 22px);
  line-height: 1.55;
  counter-increment: question;
}

.question-list li::before {
  color: var(--accent);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 13px;
  content: "0" counter(question);
}

.future-possibilities {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.future-possibilities span {
  min-height: 64px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
  color: var(--text-soft);
  background: var(--surface);
}

.future-possibilities span:last-child {
  grid-column: span 2;
}

.story-ending {
  margin: 96px 0 32px;
  border-color: var(--line-strong);
  text-align: center;
  background: var(--surface-raised);
}

.story-ending p {
  margin: 0;
  font-size: clamp(22px, 3vw, 38px);
  font-weight: 680;
  line-height: 1.55;
}

.story-ending p + p {
  margin-top: 10px;
  color: var(--accent-soft);
}

.story-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 36px 0 0;
}

@media (max-width: 980px) {
  .story-nav {
    display: none;
  }

  .story-hero {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .story-concept {
    max-width: 720px;
  }

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

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

  .experience-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .experience-flow.six-step {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .origin-mini-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .experience-flow li {
    min-height: 132px;
    border: 1px solid var(--line);
    border-radius: 16px;
  }

  .experience-flow span {
    margin-bottom: 24px;
  }
}

@media (max-width: 700px) {
  .story-topbar {
    min-height: 58px;
    padding-inline: 16px;
  }

  .story-page {
    width: min(calc(100% - 32px), 1180px);
    padding-top: 24px;
  }

  .story-hero {
    gap: 28px;
    padding: 40px 0 56px;
  }

  .story-hero h1 {
    margin-top: 18px;
    font-size: clamp(48px, 15vw, 56px);
  }

  .story-subtitle {
    font-size: 18px;
  }

  .story-meta {
    gap: 30px;
    margin-top: 36px;
  }

  .story-meta dd {
    font-size: 16px;
  }

  .story-concept {
    border-radius: 18px;
    padding: 24px;
  }

  .story-concept p {
    margin-top: 16px;
    font-size: 20px;
  }

  .story-section {
    padding: 68px 0;
  }

  .section-title {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-bottom: 30px;
  }

  .section-title h2 {
    font-size: 38px;
  }

  .origin-grid,
  .future-grid,
  .concept-grid,
  .ai-grid,
  .memory-case,
  .persona-model,
  .data-layout,
  .capability-grid,
  .capability-grid .capability-wide,
  .showroom-statement,
  .world-grid,
  .output-grid,
  .personalization-grid,
  .responsibility-split,
  .difference-grid,
  .experience-flow.nine-step,
  .experience-flow.eight-step,
  .archive-case,
  .world-grid.archive-materials,
  .world-grid.reconstruction-grid,
  .preserve-grid {
    grid-template-columns: 1fr;
  }

  .long-copy,
  .thinking-note,
  .memory-case,
  .story-ending,
  .concept-grid article,
  .ai-grid article {
    border-radius: 16px;
    padding: 22px;
  }

  .long-copy p,
  .thinking-note p,
  .memory-copy p,
  .future-section p {
    font-size: 15px;
  }

  .experience-flow {
    grid-template-columns: 1fr;
  }

  .experience-flow.six-step {
    grid-template-columns: 1fr;
  }

  .experience-flow li {
    display: grid;
    min-height: 0;
    grid-template-columns: 42px minmax(0, 1fr);
    align-items: start;
    gap: 12px;
    padding: 18px;
  }

  .experience-flow span {
    margin: 0;
  }

  .question-list li {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 8px;
    font-size: 16px;
  }

  .future-possibilities {
    grid-template-columns: 1fr;
  }

  .future-possibilities span:last-child {
    grid-column: auto;
  }

  .capability-grid .capability-wide {
    grid-column: auto;
    gap: 22px;
  }

  .persona-statement,
  .data-note,
  .model-result,
  .capability-grid article,
  .personalization-grid article,
  .personalization-question {
    border-radius: 16px;
    padding: 22px;
  }

  .showroom-statement p {
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 22px 0;
    font-size: 16px;
  }

  .showroom-statement p:last-child {
    border-bottom: 0;
  }

  .showroom-statement span {
    margin-bottom: 12px;
  }

  .world-grid li,
  .output-grid li {
    min-height: 0;
  }

  .origin-mini-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .origin-mini-flow li,
  .experience-flow.nine-step li,
  .experience-flow.eight-step li,
  .preserve-grid li {
    min-height: 0;
  }

  .responsibility-split article,
  .difference-grid article,
  .difference-result,
  .archive-case,
  .reconstruction-note {
    border-radius: 16px;
    padding: 22px;
  }

  .story-ending {
    margin-top: 68px;
  }

  .story-ending p {
    font-size: 22px;
  }

  .story-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

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