:root {
  --paper: #f7f7f5;
  --surface: #ffffff;
  --line: #d9d9d5;
  --dark: #111111;
  --white: #ffffff;
  --sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  /* Ink tiers — mirrors 点点2.0,black @ opacity on a light paper (Figma Ink/100..30) */
  --ink-100: rgba(0, 0, 0, 1);
  --ink-80: rgba(0, 0, 0, 0.8);
  --ink-65: rgba(0, 0, 0, 0.65);
  --ink-45: rgba(0, 0, 0, 0.45);
  --ink-30: rgba(0, 0, 0, 0.3);

  /* Type scale — same 8-step px scale as 点点2.0 */
  --fs-h1: 38.5px;
  --fs-h2: 28.9px;
  --fs-t1: 23.1px;
  --fs-h3: 18.3px;
  --fs-body: 14.4px;
  --fs-eyebrow: 13.5px;
  --fs-nav: 11.6px;
  --fs-label: 10.6px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink-100);
  font-family: var(--sans);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; }

.topbar {
  position: fixed;
  z-index: 30;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
  padding: 0 28px;
  border-bottom: 1px solid rgba(17, 17, 17, 0.12);
  background: rgba(247, 247, 245, 0.92);
  backdrop-filter: blur(16px);
}

.topbar a,
.topbar span {
  color: var(--ink-100);
  font: 400 var(--fs-nav)/1.5 var(--mono);
  letter-spacing: 0.02em;
  text-decoration: none;
}

.topbar__back:hover,
.topbar__title:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-shell {
  display: grid;
  grid-template-columns: 176px minmax(0, 1120px);
  gap: clamp(36px, 6vw, 96px);
  width: min(100% - 56px, 1416px);
  margin: 0 auto;
  padding-top: 56px;
}

.case-index {
  position: sticky;
  top: 96px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 74px;
}

.case-index__title {
  margin: 0 0 12px;
  color: var(--ink-45);
  font: 400 var(--fs-label)/1 var(--mono);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.case-index a {
  position: relative;
  color: var(--ink-45);
  font: 400 var(--fs-nav)/1.5 var(--mono);
  text-decoration: none;
  transition: color 180ms ease;
}

.case-index a::before {
  position: absolute;
  top: 0.65em;
  left: -18px;
  width: 8px;
  height: 1px;
  background: var(--ink-100);
  content: "";
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.case-index a:hover,
.case-index a.is-active { color: var(--ink-100); }

.case-index a.is-active::before {
  opacity: 1;
  transform: none;
}

.case-main { min-width: 0; }

.hero {
  padding: clamp(72px, 9vw, 124px) 0 clamp(96px, 12vw, 156px);
}

.hero__heading { max-width: 800px; }

.eyebrow,
.caption {
  margin: 0;
  color: var(--ink-65);
  font: 400 var(--fs-eyebrow)/1.4 var(--mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 18px 0;
  color: var(--ink-100);
  font-family: "Alibaba PuHuiTi 3.0", var(--sans);
  font-size: var(--fs-h1);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1.03;
}

.hero__dek {
  max-width: 700px;
  margin: 0;
  color: var(--ink-80);
  font-size: var(--fs-h3);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.4;
}

.project-meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  margin: clamp(52px, 7vw, 84px) 0 36px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.project-meta div { min-width: 0; }

.project-meta dt {
  margin-bottom: 8px;
  color: var(--ink-30);
  font: 400 var(--fs-label)/1 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.project-meta dd {
  margin: 0;
  color: var(--ink-100);
  font-size: var(--fs-body);
  line-height: 1.5;
}

.media { margin: 0; }
.media img { width: 100%; height: auto; }

.media figcaption {
  max-width: 720px;
  margin-top: 12px;
  color: var(--ink-45);
  font-size: var(--fs-label);
  line-height: 1.6;
}

.media--hero {
  overflow: hidden;
  display: grid;
  place-items: center;
  min-height: 420px;
  padding: clamp(24px, 4vw, 48px);
  background: var(--dark);
}

.media--hero img {
  max-width: min(100%, 810px);
  max-height: 576px;
  width: auto;
  height: auto;
  object-fit: contain;
}

.section {
  padding: clamp(76px, 9vw, 112px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 72px;
}

.section-head {
  max-width: 820px;
  margin-bottom: clamp(44px, 5vw, 68px);
}

.section-head h2,
.chapter-title h2 {
  margin: 18px 0 0;
  color: var(--ink-100);
  font-size: var(--fs-h2);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.section-head--split {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 0.75fr);
  gap: clamp(48px, 8vw, 104px);
  max-width: none;
}

.section-head--compact { margin-bottom: 56px; }

.section-head__intro,
.chapter-title__intro {
  max-width: 650px;
  margin: 26px 0 0;
  color: var(--ink-65);
  font-size: var(--fs-body);
  line-height: 1.75;
}

.prose p,
.narrative-row__copy p,
.decision__copy p {
  margin: 0 0 18px;
  color: var(--ink-65);
  font-size: var(--fs-body);
  line-height: 1.8;
}

.two-column-copy {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(40px, 7vw, 96px);
  max-width: 980px;
}

.two-column-copy h3,
.narrative-row h3,
.decision h3 {
  margin: 0 0 14px;
  color: var(--ink-80);
  font-size: var(--fs-h3);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.4;
}

.two-column-copy p {
  margin: 0;
  color: var(--ink-65);
  font-size: var(--fs-body);
  line-height: 1.8;
}

.takeaways {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 72px;
  background: var(--line);
  border: 1px solid var(--line);
}

.takeaways article {
  padding: clamp(28px, 4vw, 48px);
  background: var(--surface);
}

.takeaways span,
.solution-list span,
.contribution-list span,
.goals li span {
  color: var(--ink-45);
  font: 400 var(--fs-label)/1 var(--mono);
}

.takeaways h3 {
  margin: 32px 0 10px;
  color: var(--ink-80);
  font-size: var(--fs-t1);
  font-weight: 400;
  letter-spacing: -0.02em;
}

.takeaways p {
  max-width: 390px;
  margin: 0;
  color: var(--ink-65);
  font-size: var(--fs-body);
  line-height: 1.7;
}

.phone-compare {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(320px, 1.2fr);
  gap: clamp(42px, 8vw, 104px);
  align-items: center;
  min-height: 680px;
  padding: clamp(36px, 6vw, 72px);
  background: var(--dark);
}

.phone-compare .caption,
.phone-compare__note { color: #b5b5b5; }

.segmented-control {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  margin: 26px 0;
  border-top: 1px solid #3d3d3d;
}

.segmented-control button {
  padding: 18px 0;
  border: 0;
  border-bottom: 1px solid #3d3d3d;
  background: transparent;
  color: #808080;
  font-size: var(--fs-body);
  text-align: left;
  cursor: pointer;
  transition: color 180ms ease;
}

.segmented-control button.is-active,
.segmented-control button:hover { color: var(--white); }

.phone-compare__note {
  max-width: 360px;
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.7;
}

.phone-compare__stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 540px;
}

.phone-compare__image {
  width: min(100%, 340px);
  max-height: 610px;
  object-fit: contain;
  filter: drop-shadow(0 28px 48px rgba(0, 0, 0, 0.36));
}

.chapter-title {
  position: relative;
  max-width: 900px;
  margin-bottom: clamp(56px, 7vw, 84px);
}

.chapter-title__type {
  position: absolute;
  top: 0;
  right: 0;
  margin: 0;
  color: var(--ink-45);
  font: 400 var(--fs-label)/1.4 var(--mono);
}

.logic-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: clamp(64px, 8vw, 96px);
  background: var(--line);
  border: 1px solid var(--line);
}

.logic-grid article {
  min-height: 260px;
  padding: 30px;
  background: var(--surface);
}

.logic-grid h3 {
  margin: 56px 0 12px;
  color: var(--ink-80);
  font-size: var(--fs-h3);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.35;
}

.logic-grid article > p:last-child {
  margin: 0;
  color: var(--ink-65);
  font-size: var(--fs-body);
  line-height: 1.7;
}

.logic-grid ul {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  color: var(--ink-65);
  font-size: var(--fs-body);
  line-height: 1.65;
  list-style: none;
}

.logic-grid li {
  position: relative;
  padding-left: 14px;
}

.logic-grid li::before {
  position: absolute;
  top: 0;
  left: 0;
  content: "·";
}

.narrative-row {
  display: grid;
  grid-template-columns: minmax(260px, 0.68fr) minmax(0, 1.32fr);
  gap: clamp(44px, 8vw, 104px);
  align-items: center;
  margin-bottom: clamp(72px, 9vw, 112px);
}

.narrative-row--reverse {
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
}

.narrative-row h3,
.decision h3 {
  margin-top: 18px;
}

.media--board {
  overflow: hidden;
  background: transparent;
}

.solution-block {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: clamp(48px, 8vw, 104px);
  align-items: center;
  margin-bottom: clamp(72px, 9vw, 112px);
}

.solution-block__stage {
  display: grid;
  place-items: center;
  min-height: 720px;
  padding: clamp(32px, 5vw, 60px);
  background: var(--dark);
}

.solution-block__stage img {
  max-width: min(100%, 810px);
  max-height: 576px;
  width: auto;
  height: auto;
  object-fit: contain;
}

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

.solution-list li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 14px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.solution-list h3 {
  margin: -3px 0 7px;
  color: var(--ink-100);
  font-size: var(--fs-body);
  font-weight: 400;
}

.solution-list p {
  margin: 0;
  color: var(--ink-65);
  font-size: var(--fs-body);
  line-height: 1.65;
}

.media--full {
  margin-bottom: clamp(80px, 11vw, 136px);
}

.goals {
  display: grid;
  grid-template-columns: 0.55fr 1.45fr;
  gap: 48px;
  margin: 0 0 clamp(92px, 13vw, 164px);
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.goals ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.goals li {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  padding: 0 0 22px;
}

.goals li p {
  margin: -4px 0 0;
  color: var(--ink-65);
  font-size: var(--fs-body);
  line-height: 1.6;
}

.decision {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(48px, 8vw, 104px);
  align-items: center;
  margin-bottom: clamp(72px, 9vw, 112px);
}

.contribution-list { border-top: 1px solid var(--ink-100); }

.contribution-list article {
  display: grid;
  grid-template-columns: 48px minmax(150px, 0.6fr) minmax(280px, 1.4fr);
  gap: 28px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.contribution-list h3 {
  margin: -4px 0 0;
  color: var(--ink-100);
  font-size: var(--fs-body);
  font-weight: 400;
}

.contribution-list p {
  margin: -4px 0 0;
  color: var(--ink-65);
  font-size: var(--fs-body);
  line-height: 1.7;
}

.reflection {
  padding-bottom: clamp(112px, 16vw, 200px);
}

.reflection blockquote {
  max-width: 940px;
  margin: 36px 0 clamp(72px, 10vw, 116px);
  color: var(--ink-80);
  font-size: var(--fs-t1);
  font-weight: 400;
  line-height: 1.35;
}

.reflection__footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--ink-100);
}

.reflection__footer p,
.reflection__footer a {
  margin: 0;
  color: var(--ink-45);
  font-size: var(--fs-label);
  line-height: 1.6;
}

.reflection__footer p { max-width: 520px; }

.reflection__footer a {
  color: var(--ink-45);
  white-space: nowrap;
  text-decoration: none;
}

.reflection__footer a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
}

[data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
}

@media (max-width: 1040px) {
  .page-shell {
    display: block;
    width: min(100% - 40px, 920px);
  }

  .case-index { display: none; }

  .section-head--split,
  .narrative-row,
  .narrative-row--reverse,
  .solution-block,
  .decision {
    grid-template-columns: 1fr;
  }

  .section-head--split { gap: 36px; }

  .narrative-row,
  .decision { gap: 40px; }

  .narrative-row--reverse .narrative-row__copy { grid-row: 1; }

  .solution-block__stage { min-height: 620px; }
}

@media (max-width: 720px) {
  .topbar {
    min-height: 52px;
    padding: 0 18px;
  }

  .topbar__title { display: none; }

  .page-shell {
    width: min(100% - 32px, 620px);
    padding-top: 52px;
  }

  .hero { padding-top: 56px; }
  .hero h1 { font-size: 32px; }
  .hero__dek { font-size: 16px; }

  .project-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 22px;
  }

  .media--hero {
    min-height: 280px;
    padding: 20px 14px;
  }

  .two-column-copy,
  .takeaways,
  .logic-grid,
  .phone-compare,
  .goals {
    grid-template-columns: 1fr;
  }

  .two-column-copy { gap: 40px; }
  .takeaways article { padding: 28px; }

  .phone-compare {
    min-height: 0;
    padding: 32px 24px 42px;
  }

  .phone-compare__stage { min-height: 460px; }
  .phone-compare__image { max-height: 500px; }

  .chapter-title__type {
    position: static;
    margin-top: 10px;
  }

  .logic-grid article { min-height: 0; }
  .logic-grid h3 { margin-top: 30px; }

  .solution-block__stage {
    min-height: 480px;
    padding: 24px 12px;
  }

  .goals { gap: 32px; }

  .contribution-list article {
    grid-template-columns: 38px 1fr;
    gap: 12px;
  }

  .contribution-list p { grid-column: 2; }

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

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}


/* Compact click-to-compare positioning story */
.section--positioning {
  padding-bottom: clamp(84px, 9vw, 112px);
}

.section--positioning .section-head {
  margin-bottom: clamp(38px, 5vw, 56px);
}

.phone-compare {
  grid-template-columns: minmax(460px, 1fr) minmax(360px, 1fr);
  min-height: 500px;
  padding: clamp(32px, 4vw, 48px);
}

.phone-compare__stage {
  min-height: 420px;
}

.phone-compare__image {
  position: absolute;
  width: min(100%, 330px);
  max-height: 460px;
  opacity: 0;
  visibility: hidden;
  object-fit: contain;
  transform: translateY(10px) scale(0.99);
  transition:
    opacity 420ms var(--ease),
    transform 520ms var(--ease),
    visibility 0s linear 520ms;
}

.phone-compare__image.is-active {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition-delay: 0s;
}

.phone-compare__notes {
  position: relative;
  min-height: 50px;
}

.phone-compare__note {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 220ms ease, transform 360ms var(--ease);
}

.phone-compare__note.is-active {
  opacity: 1;
  transform: none;
}

@media (max-width: 720px) {
  .phone-compare {
    grid-template-columns: 1fr;
    gap: 14px;
    min-height: 0;
    padding: 28px 24px 32px;
  }

  .phone-compare__stage {
    min-height: 420px;
  }

  .phone-compare__image {
    width: min(100%, 290px);
    max-height: 420px;
  }
}


/* Other contributions: click to open an autoplaying evidence screen */
.other-explorer {
  display: grid;
  grid-template-columns: minmax(300px, 0.66fr) minmax(0, 1.34fr);
  gap: clamp(40px, 7vw, 88px);
  align-items: start;
}

.contribution-list--interactive {
  border-top: 1px solid var(--ink-100);
}

.contribution-list--interactive button {
  display: grid;
  grid-template-columns: 38px 1fr 20px;
  gap: 14px;
  width: 100%;
  padding: 24px 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: var(--ink-100);
  text-align: left;
  cursor: pointer;
  transition: padding 280ms var(--ease), background 180ms ease, color 180ms ease;
}

.contribution-list--interactive button > span {
  color: var(--ink-45);
  font: 400 var(--fs-label)/1.4 var(--mono);
}

.contribution-list--interactive h3 {
  margin: -3px 0 7px;
  color: inherit;
  font-size: var(--fs-body);
  font-weight: 400;
}

.contribution-list--interactive p {
  margin: 0;
  color: var(--ink-65);
  font-size: var(--fs-body);
  line-height: 1.65;
}

.contribution-list--interactive b {
  color: var(--ink-45);
  font-size: var(--fs-body);
  font-weight: 400;
  opacity: 0;
  transform: translate(-5px, 5px);
  transition: opacity 180ms ease, transform 260ms var(--ease);
}

.contribution-list--interactive button:hover b,
.contribution-list--interactive button.is-active b {
  opacity: 1;
  transform: none;
}

.contribution-list--interactive button.is-active {
  padding-right: 18px;
  padding-left: 18px;
  background: var(--dark);
  color: var(--white);
}

.contribution-list--interactive button.is-active > span,
.contribution-list--interactive button.is-active p,
.contribution-list--interactive button.is-active b {
  color: #b5b5b5;
}

.other-preview {
  overflow: hidden;
  background: var(--dark);
  color: var(--white);
}

.other-preview__topline,
.other-preview__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 15px 18px;
}

.other-preview__topline {
  border-bottom: 1px solid #333333;
}

.other-preview__topline p,
.other-preview__topline span,
.other-preview__footer span {
  margin: 0;
  color: #b5b5b5;
  font: 400 var(--fs-label)/1.4 var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.other-preview__topline p {
  color: var(--white);
}

.other-preview__viewport {
  position: relative;
  overflow: hidden;
  max-width: 90%;
  height: 576px;
  margin: 0 auto;
  background: #000;
}

.other-preview__panel {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 420ms var(--ease), visibility 0s linear 420ms;
}

.other-preview__panel.is-active {
  opacity: 1;
  visibility: visible;
  transition-delay: 0s;
}

.other-preview__panel img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0;
  transform: scale(1.012);
  transition: opacity 500ms var(--ease), transform 900ms var(--ease);
}

.other-preview__panel img.is-active,
.other-preview__panel--pan.is-active img {
  opacity: 1;
  transform: none;
}

.other-preview__panel--pan.is-playing img {
  animation: other-preview-pan 7s ease-in-out infinite alternate;
}

.other-preview__footer {
  border-top: 1px solid #333333;
}

.other-preview__footer i {
  font-style: normal;
}

@keyframes other-preview-pan {
  from { transform: scale(1.005); }
  to { transform: scale(1.055); }
}

@media (max-width: 1040px) {
  .other-explorer {
    grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1.28fr);
    gap: 32px;
  }
}

@media (max-width: 720px) {
  .other-explorer {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .other-preview__viewport {
    height: 360px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .other-preview__panel--pan.is-playing img {
    animation: none;
  }
}


/* Other contributions: stacked controls above a full-width preview */
.other-explorer {
  grid-template-columns: 1fr;
  gap: 32px;
}

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

.contribution-list--interactive button {
  grid-template-columns: 30px 1fr 18px;
  align-content: start;
  min-height: 170px;
  padding: 24px 18px;
  border-right: 1px solid var(--line);
}

.contribution-list--interactive button.is-active {
  padding: 24px 18px;
}

@media (max-width: 900px) {
  .contribution-list--interactive {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .contribution-list--interactive {
    grid-template-columns: 1fr;
  }

  .contribution-list--interactive button {
    min-height: 0;
  }
}


/* Other contributions: full-width horizontal information rows */
.contribution-list--interactive { display: grid; grid-template-columns: 1fr; border-top: 1px solid var(--ink-100); border-left: 0; }
.contribution-list--interactive button { grid-template-columns: 44px minmax(150px, .28fr) minmax(0, 1fr) 18px; align-items: center; align-content: normal; gap: 20px; min-height: 92px; padding: 20px 18px; border-right: 0; }
.contribution-list--interactive button > div { display: contents; }
.contribution-list--interactive h3, .contribution-list--interactive p { margin: 0; }
.contribution-list--interactive button.is-active { padding: 20px 18px; }
@media (max-width: 720px) { .contribution-list--interactive button { grid-template-columns: 34px minmax(120px, .4fr) minmax(0, 1fr) 16px; gap: 12px; } }
@media (max-width: 560px) { .contribution-list--interactive button { grid-template-columns: 28px 1fr 16px; align-items: start; min-height: 0; } .contribution-list--interactive button > div { display: block; } .contribution-list--interactive h3 { margin: -3px 0 7px; } }


/* Other contributions: integrated accordion drawer */
.other-explorer { display: block; }
.contribution-list--interactive { overflow: hidden; }
.contribution-list--interactive button { position: relative; z-index: 1; }
.contribution-list--interactive b { opacity: 1; transform: none; font: 300 22px/1 var(--sans); text-align: center; }
.contribution-list--interactive button.is-active { border-bottom-color: #333333; }
.contribution-list--interactive .other-preview { width: 100%; max-height: 0; opacity: 0; transform: translateY(-10px); border-bottom: 0 solid var(--line); transition: max-height 520ms var(--ease), opacity 240ms ease, transform 420ms var(--ease), border-width 0s linear 520ms; }
.contribution-list--interactive .other-preview.is-open { max-height: 900px; opacity: 1; transform: none; border-bottom-width: 1px; transition: max-height 620ms var(--ease), opacity 300ms 90ms ease, transform 520ms var(--ease), border-width 0s; }
@media (max-width: 560px) { .contribution-list--interactive .other-preview.is-open { max-height: 620px; } }
@media (prefers-reduced-motion: reduce) { .contribution-list--interactive .other-preview, .contribution-list--interactive .other-preview.is-open { transition: none; } }


/* Point AI 3.0 case-study restructure */
.two-column-copy {
  grid-template-columns: minmax(132px, 0.28fr) minmax(0, 1.72fr);
  gap: 0 clamp(40px, 6vw, 88px);
  max-width: none;
  border-top: 1px solid var(--line);
}

.two-column-copy > div {
  display: contents;
}

.two-column-copy h3,
.two-column-copy p {
  margin: 0;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.two-column-copy h3 {
  font-size: var(--fs-body);
  line-height: 1.7;
}

.two-column-copy p {
  max-width: 760px;
}

.positioning-block {
  margin-top: clamp(56px, 7vw, 80px);
}

.phone-compare__copy {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.phone-compare__copy h3 {
  max-width: none;
  margin: 16px 0 0;
  white-space: nowrap;
  color: var(--white);
  font-size: var(--fs-t1);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.35;
}

.phone-compare__copy .segmented-control {
  margin: 58px 0 36px;
}

.phone-compare__notes {
  min-height: 132px;
}

.phone-compare__note {
  max-width: 430px;
  font-size: var(--fs-body);
  line-height: 1.8;
}

.section-head--nested {
  margin-bottom: 48px;
}

.section-head--nested h3 {
  max-width: 460px;
  margin: 16px 0 0;
  color: var(--ink-80);
  font-size: var(--fs-t1);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.quote-cloud {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(18px, 2vw, 28px);
  margin: 0 0 clamp(64px, 8vw, 96px);
  padding: 24px 32px;
  overflow: hidden;
}

.quote-cloud blockquote {
  display: grid;
  flex: 0 1 340px;
  align-content: center;
  min-height: 88px;
  margin: 0;
  padding: 14px 24px;
  border: 0;
  border-radius: 16px 16px 2px 16px;
  background: #58c0aa;
  color: #fff;
  font-size: 15px;
  line-height: 1.7;
  box-shadow: none;
  animation: quote-float 5.8s ease-in-out infinite alternate;
}

.quote-cloud blockquote:nth-child(2) {
  border: 1px solid rgba(17, 17, 17, 0.1);
  border-radius: 16px 16px 16px 2px;
  background: var(--surface);
  color: var(--ink-100);
  animation-delay: -1.9s;
}

.quote-cloud blockquote:nth-child(3) {
  animation-delay: -3.8s;
}

@keyframes quote-float {
  from { translate: 0 -6px; }
  to { translate: 0 6px; }
}

.design-principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 clamp(72px, 9vw, 112px);
  padding: 1px;
  background: var(--line);
  list-style: none;
}

.design-principles li {
  min-height: 270px;
  padding: clamp(26px, 3vw, 38px);
  background: var(--surface);
}

.design-principles span {
  color: var(--ink-45);
  font: 400 var(--fs-label)/1 var(--mono);
}

.design-principles h3 {
  margin: 46px 0 14px;
  color: var(--ink-80);
  font-size: var(--fs-h3);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.45;
}

.design-principles p {
  margin: 0;
  color: var(--ink-65);
  font-size: var(--fs-body);
  line-height: 1.75;
}

.handoff-block {
  display: grid;
  grid-template-columns: minmax(250px, 0.55fr) minmax(0, 1.45fr);
  gap: clamp(44px, 7vw, 92px);
  align-items: center;
}

.handoff-block__copy h3 {
  margin: 16px 0 14px;
  color: var(--ink-80);
  font-size: var(--fs-t1);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.4;
}

.handoff-block__copy > p:last-child {
  margin: 0;
  color: var(--ink-65);
  font-size: var(--fs-body);
  line-height: 1.8;
}

.handoff-block__media {
  overflow: hidden;
  background: #eef1f0;
}

.handoff-block__media img {
  width: 100%;
  height: auto;
}

.section--result .solution-block {
  margin-bottom: 0;
}

.case-end-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-top: clamp(72px, 9vw, 112px);
  padding: 24px 0;
  border-top: 1px solid var(--ink-100);
}

.case-end-nav span,
.case-end-nav a {
  color: var(--ink-45);
  font: 400 var(--fs-label)/1.5 var(--mono);
  text-decoration: none;
}

.case-end-nav a {
  color: var(--ink-45);
}

.case-end-nav a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Opening motion: retain the authored animation and enlarge the whole stage */
.media--hero-motion {
  display: grid;
  place-items: center;
  min-height: 750px;
  height: 750px;
  padding: 0;
  overflow: hidden;
  background: #eef1f0 !important;
}

.media--hero-motion > x-dc {
  position: relative;
  display: block;
  width: 100%;
  height: 750px;
  overflow: hidden;
  background: #eef1f0;
}

.media--hero-motion .sc-host {
  position: relative !important;
  display: block !important;
  width: 432px !important;
  height: 768px !important;
  margin: -6px auto 0;
  overflow: hidden;
  background: #eef1f0 !important;
  transform: scale(1.08) !important;
  transform-origin: 50% 50% !important;
}

.media--hero-motion .sc-host > .sc-host-x > [data-om-starter] > div:last-child,
.media--hero-motion .twk-panel {
  display: none !important;
}

.media--hero-motion .sc-host > .sc-host-x > [data-om-starter],
.media--hero-motion [data-om-starter] > div:first-child,
.media--hero-motion svg[data-om-exportable-video-with-duration-secs] {
  background: #eef1f0 !important;
  box-shadow: none !important;
}

@media (max-width: 1040px) {
  .quote-cloud,
  .design-principles,
  .handoff-block {
    grid-template-columns: 1fr;
  }

  .quote-cloud blockquote {
    min-height: 0;
  }
}

@media (max-width: 720px) {
  .media--hero-motion,
  .media--hero-motion > x-dc {
    min-height: 605px;
    height: 605px;
  }

  .media--hero-motion .sc-host {
    width: 334px !important;
    height: 593px !important;
    transform: scale(1.05) !important;
  }

  .quote-cloud {
    padding: 24px;
  }

  .design-principles li {
    min-height: 0;
  }

  .case-end-nav {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  .quote-cloud blockquote {
    animation: none;
    translate: none;
  }
}


/* Figma prototype and recorded interactions */
.solution-block__stage {
  position: relative;
  align-self: start;
  min-height: 0;
  padding: 0;
  overflow: visible;
  background: transparent;
}
.map-prototype {
  position: relative;
  width: auto;
  height: 576px;
  aspect-ratio: 393 / 853;
  margin: 0 auto;
  overflow: hidden;
  border: 1.5px solid rgba(0, 0, 0, 0.35);
  border-radius: 48px;
  -webkit-clip-path: url(#map-screen-squircle);
  clip-path: url(#map-screen-squircle);
  background: #f3f3f3;
  box-shadow: none;
  isolation: isolate;
}
.map-prototype__state {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 320ms ease, visibility 0s linear 320ms;
}
.map-prototype__state.is-active {
  opacity: 1;
  visibility: visible;
  transition: opacity 320ms ease;
  z-index: 1;
}
.map-prototype__state--video video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: none;
  border-radius: inherit;
  background: #f3f3f3;
}
.map-chat-sequence {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background: #f3f3f3;
}
.map-chat-sequence__layer {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  max-height: none;
  object-fit: fill;
}
.map-chat-sequence__chrome--top { clip-path: inset(0 0 86% 0); }
.map-chat-sequence__chrome--bottom { clip-path: inset(89% 0 0 0); }
.map-chat-sequence__rise {
  opacity: 0;
  transform: translateY(22px);
  will-change: opacity, transform;
}
.map-chat-sequence__rise--note { clip-path: inset(13% 0 49% 0); }
.map-chat-sequence__rise--question { clip-path: inset(49% 0 37% 0); }
.map-chat-sequence__rise--answer { clip-path: inset(61% 0 19% 0); }
.map-chat-sequence__rise--map { clip-path: inset(79% 0 9% 0); }
.map-prototype__state--chat.is-active .map-chat-sequence__rise--note { animation: map-bubble-rise 680ms 120ms var(--ease) both; }
.map-prototype__state--chat.is-active .map-chat-sequence__rise--question { animation: map-bubble-rise 680ms 820ms var(--ease) both; }
.map-prototype__state--chat.is-active .map-chat-sequence__rise--answer { animation: map-bubble-rise 760ms 1550ms var(--ease) both; }
.map-prototype__state--chat.is-active .map-chat-sequence__rise--map { animation: map-bubble-rise 820ms 2450ms var(--ease) both; }
@keyframes map-bubble-rise {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}
.solution-list li[data-highlight] {
  cursor: pointer;
  transition: padding 260ms var(--ease), background 180ms ease;
}
.solution-list li[data-highlight].is-active {
  padding-right: 14px;
  padding-left: 14px;
  background: #f1f1ef;
}
.solution-list li[data-highlight]:focus-visible { outline: 1px solid var(--ink-100); outline-offset: 3px; }
@media (max-width: 720px) {
  .map-prototype { height: 360px; border-radius: 38px; }
}
@media (prefers-reduced-motion: reduce) {
  .map-prototype__state, .map-chat-sequence__rise { animation: none !important; transition: none !important; opacity: 1; transform: none; }
}

.map-prototype__clip-defs { position: absolute; width: 0; height: 0; overflow: hidden; }


/* 05 interaction refinements */
.contribution-list--interactive button.is-active {
  background: #f1f1ef;
  color: var(--ink-100);
}
.contribution-list--interactive button.is-active > span,
.contribution-list--interactive button.is-active p,
.contribution-list--interactive button.is-active b {
  color: var(--ink-65);
}
.other-preview__viewport {
  background: #000;
}

.other-preview__topline { cursor: pointer; }
.other-preview__topline:focus-visible { outline: 1px solid var(--white); outline-offset: -3px; }