:root {
  --hermes-gold: #d8a45b;
  --hermes-gold-light: #f0cf96;
  --hermes-line: rgba(216, 164, 91, 0.3);
  --hermes-black: #070b10;
}

.case-study-page {
  background:
    radial-gradient(circle at 78% 3%, rgba(216, 164, 91, 0.1), transparent 30rem),
    radial-gradient(circle at 10% 24%, rgba(51, 211, 166, 0.07), transparent 26rem),
    var(--hermes-black);
}

.case-study-page::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: 0.14;
  background-image: radial-gradient(rgba(240, 207, 150, 0.34) 0.6px, transparent 0.6px);
  background-size: 18px 18px;
  mask-image: linear-gradient(to bottom, black, transparent 72%);
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  color: #071016;
  background: var(--accent-strong);
  font-weight: 800;
  transform: translateY(-160%);
}

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

.case-header {
  background: rgba(7, 11, 16, 0.86);
}

.case-header .nav {
  width: min(1240px, calc(100% - 40px));
}

.case-shell {
  width: min(1240px, calc(100% - 40px));
  margin: 0 auto;
}

.case-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(72px, 10vw, 138px) 0 0;
}

.case-hero::after {
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, transparent, var(--hermes-line), transparent);
}

.case-hero-grid {
  display: grid;
  grid-template-columns: minmax(390px, 0.8fr) minmax(520px, 1.2fr);
  gap: clamp(32px, 4.5vw, 64px);
  align-items: center;
}

.case-hero-copy,
.hero-art,
.proof-copy,
.proof-grid > .evidence-frame {
  min-width: 0;
}

.case-eyebrow {
  margin: 0 0 18px;
  color: var(--hermes-gold);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.case-hero h1 {
  max-width: 680px;
  margin: 0 0 26px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3.5rem, 5.4vw, 5.3rem);
  font-weight: 500;
  line-height: 0.96;
  letter-spacing: -0.04em;
  overflow-wrap: normal;
  text-wrap: balance;
}

.case-lead {
  max-width: 640px;
  margin-bottom: 34px;
  color: #c6ced8;
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  line-height: 1.65;
}

.case-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hermes-button {
  color: #120d06;
  background: linear-gradient(135deg, var(--hermes-gold-light), var(--hermes-gold));
  box-shadow: 0 14px 42px rgba(216, 164, 91, 0.18);
}

.case-study-page a:focus-visible,
.case-study-page button:focus-visible {
  outline: 3px solid var(--accent-strong);
  outline-offset: 4px;
}

.evidence-frame {
  position: relative;
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--hermes-line);
  border-radius: var(--radius);
  background: #05080c;
  box-shadow: 0 32px 90px rgba(0, 0, 0, 0.45);
}

.evidence-frame::after {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.evidence-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.hero-art {
  transform: perspective(1200px) rotateY(-2deg);
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: clamp(58px, 8vw, 94px);
  border: 1px solid var(--hermes-line);
  background: var(--hermes-line);
}

.metric-strip article {
  padding: clamp(22px, 3vw, 34px);
  background: rgba(9, 14, 20, 0.96);
}

.metric-strip strong,
.metric-strip span {
  display: block;
}

.metric-strip strong {
  margin-bottom: 6px;
  color: var(--hermes-gold-light);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.8rem, 3.6vw, 3.1rem);
  font-weight: 500;
  line-height: 1;
}

.metric-strip span {
  color: var(--muted);
  font-size: 0.82rem;
}

.case-section {
  padding: clamp(82px, 10vw, 140px) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.section-tinted {
  background:
    linear-gradient(135deg, rgba(216, 164, 91, 0.035), transparent 44%),
    rgba(255, 255, 255, 0.018);
}

.origin-grid {
  display: grid;
  grid-template-columns: 52px minmax(400px, 0.95fr) minmax(420px, 1.05fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.section-index {
  padding-top: 8px;
  color: var(--hermes-gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.4rem;
}

.case-heading h2,
.section-split-heading h2,
.proof-copy h2,
.delivery-heading h2 {
  margin-bottom: 18px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.6rem, 4vw, 4.25rem);
  font-weight: 500;
  line-height: 1.04;
  letter-spacing: -0.035em;
  overflow-wrap: normal;
  text-wrap: balance;
}

.origin-copy > p,
.wide-heading > p:not(.case-eyebrow),
.section-split-heading > p,
.proof-copy > p,
.delivery-copy > p {
  color: var(--muted);
  font-size: 1.05rem;
}

.origin-copy blockquote {
  padding: 22px 0 4px 24px;
  margin: 30px 0 0;
  border-left: 2px solid var(--hermes-gold);
  color: var(--hermes-gold-light);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  line-height: 1.35;
}

.wide-heading {
  max-width: 900px;
  margin-bottom: 48px;
}

.wide-heading > p:not(.case-eyebrow) {
  max-width: 760px;
}

.capability-grid,
.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.1);
}

.capability-grid article,
.principle-grid article {
  min-height: 250px;
  padding: clamp(24px, 3vw, 36px);
  background: #0a1017;
}

.capability-grid article > span {
  display: inline-grid;
  width: 42px;
  height: 42px;
  margin-bottom: 44px;
  place-items: center;
  border: 1px solid var(--hermes-line);
  border-radius: 50%;
  color: var(--hermes-gold);
  font-size: 0.72rem;
  font-weight: 800;
}

.capability-grid h3,
.principle-grid h3 {
  margin-bottom: 10px;
  font-size: 1.12rem;
}

.capability-grid p,
.principle-grid p,
.boundary-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.section-split-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: clamp(40px, 6vw, 72px);
  align-items: end;
  margin-bottom: 48px;
}

.section-split-heading > p {
  padding-bottom: 6px;
}

.architecture-art figcaption {
  position: relative;
  padding: 12px 16px;
  color: var(--muted);
  background: #080d13;
  font-size: 0.78rem;
}

.boundary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 18px;
}

.boundary-grid article {
  padding: 22px;
  border-top: 1px solid var(--hermes-line);
  background: rgba(255, 255, 255, 0.025);
}

.boundary-grid strong {
  display: block;
  margin-bottom: 8px;
  color: var(--hermes-gold-light);
}

.principle-grid {
  grid-template-columns: repeat(4, 1fr);
}

.principle-grid article {
  min-height: 290px;
}

.principle-grid article > span {
  display: block;
  min-height: 70px;
  color: var(--hermes-gold);
  font-size: 0.73rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.operating-loop {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
  padding: 20px;
  border: 1px solid var(--hermes-line);
  color: #dbe2e9;
  background: rgba(216, 164, 91, 0.04);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
}

.operating-loop i {
  color: var(--hermes-gold);
  font-style: normal;
}

.build-timeline {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  padding: 0;
  margin: 70px 0 0;
  list-style: none;
}

.build-timeline li {
  position: relative;
  min-height: 174px;
  padding: 0 22px 0 0;
}

.build-timeline li::before {
  position: absolute;
  top: 20px;
  right: 0;
  left: 34px;
  height: 1px;
  content: "";
  background: var(--hermes-line);
}

.build-timeline li:last-child::before {
  display: none;
}

.build-timeline span {
  position: relative;
  z-index: 1;
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--hermes-gold);
  border-radius: 50%;
  color: var(--hermes-gold-light);
  background: var(--hermes-black);
  font-size: 0.7rem;
  font-weight: 800;
}

.build-timeline p {
  max-width: 140px;
  margin: 28px 0 0;
  color: #c8d0d9;
  font-size: 0.84rem;
  line-height: 1.45;
}

.product-proof-section {
  background:
    radial-gradient(circle at 75% 45%, rgba(216, 164, 91, 0.1), transparent 30rem),
    #060a0f;
}

.proof-grid {
  display: grid;
  grid-template-columns: minmax(380px, 0.8fr) minmax(560px, 1.2fr);
  gap: clamp(40px, 5vw, 72px);
  align-items: center;
}

.proof-copy ul {
  padding: 0;
  margin: 28px 0 34px;
  list-style: none;
}

.proof-copy li {
  padding: 12px 0 12px 26px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: #d4dbe3;
}

.proof-copy li::before {
  display: inline-block;
  width: 18px;
  margin-left: -26px;
  color: var(--hermes-gold);
  content: "◆";
  font-size: 0.55rem;
}

.inline-proof-link {
  color: var(--hermes-gold-light);
  font-weight: 800;
}

.inline-proof-link:hover {
  color: #fff1d5;
}

.delivery-grid {
  display: grid;
  grid-template-columns: minmax(380px, 0.85fr) minmax(480px, 1.15fr);
  gap: clamp(44px, 7vw, 100px);
}

.delivery-steps {
  display: grid;
  gap: 1px;
  margin-top: 34px;
  background: rgba(255, 255, 255, 0.1);
}

.delivery-steps article {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  align-items: center;
  padding: 22px;
  background: #0a1017;
}

.delivery-steps span {
  color: var(--hermes-gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.25rem;
}

.delivery-steps p {
  margin: 0;
}

.delivery-link {
  display: inline-flex;
  margin-top: 26px;
  color: var(--hermes-gold-light);
  font-weight: 800;
}

.delivery-link:hover {
  color: #fff1d5;
}

.case-closing {
  padding: clamp(90px, 13vw, 180px) 0;
  text-align: center;
  background:
    radial-gradient(circle at 50% 50%, rgba(216, 164, 91, 0.12), transparent 34rem),
    #06090e;
}

.closing-inner {
  max-width: 1050px;
}

.closing-inner blockquote {
  margin: 0 auto 44px;
  color: #f1eadf;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.2rem, 4vw, 3.9rem);
  line-height: 1.16;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

html[lang="zh-Hant"] .case-heading h2,
html[lang="zh-Hant"] .section-split-heading h2,
html[lang="zh-Hant"] .proof-copy h2,
html[lang="zh-Hant"] .delivery-heading h2 {
  font-size: clamp(2.5rem, 3.7vw, 4rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
}

html[lang="zh-Hant"] .closing-inner blockquote {
  font-size: clamp(2.1rem, 3.7vw, 3.6rem);
  line-height: 1.24;
  letter-spacing: -0.02em;
}

.closing-actions {
  justify-content: center;
}

.case-footer {
  width: min(1240px, calc(100% - 40px));
}

@media (max-width: 1020px) {
  .case-hero-grid,
  .proof-grid {
    grid-template-columns: 1fr;
  }

  .case-hero-copy {
    max-width: 760px;
  }

  .hero-art {
    transform: none;
  }

  .origin-grid {
    grid-template-columns: 52px 1fr;
  }

  .origin-copy {
    grid-column: 2;
  }

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

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

  .build-timeline {
    grid-template-columns: repeat(4, 1fr);
    row-gap: 30px;
  }

  .build-timeline li:nth-child(4)::before {
    display: none;
  }
}

@media (max-width: 760px) {
  .case-header .nav,
  .case-shell,
  .case-footer {
    width: min(100% - 28px, 1240px);
  }

  .case-hero {
    padding-top: 68px;
  }

  .case-hero h1 {
    font-size: clamp(2.8rem, 11.5vw, 4rem);
    overflow-wrap: normal;
  }

  .case-actions .button {
    width: 100%;
  }

  .metric-strip,
  .capability-grid,
  .principle-grid,
  .boundary-grid,
  .section-split-heading,
  .delivery-grid {
    grid-template-columns: 1fr;
  }

  .metric-strip article {
    display: grid;
    grid-template-columns: 130px 1fr;
    gap: 20px;
    align-items: center;
  }

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

  .section-index {
    display: none;
  }

  .origin-copy {
    grid-column: auto;
  }

  .case-heading h2,
  .section-split-heading h2,
  .proof-copy h2,
  .delivery-heading h2 {
    font-size: clamp(2.3rem, 10vw, 3.25rem);
  }

  html[lang="zh-Hant"] .case-heading h2,
  html[lang="zh-Hant"] .section-split-heading h2,
  html[lang="zh-Hant"] .proof-copy h2,
  html[lang="zh-Hant"] .delivery-heading h2 {
    font-size: clamp(2.2rem, 9vw, 3rem);
  }

  .section-split-heading {
    gap: 10px;
  }

  .capability-grid article,
  .principle-grid article {
    min-height: 0;
  }

  .capability-grid article > span,
  .principle-grid article > span {
    min-height: 0;
    margin-bottom: 24px;
  }

  .operating-loop {
    align-items: stretch;
    flex-direction: column;
  }

  .operating-loop i {
    transform: rotate(90deg);
  }

  .build-timeline {
    display: block;
    margin-top: 44px;
  }

  .build-timeline li {
    display: grid;
    grid-template-columns: 42px 1fr;
    gap: 18px;
    min-height: 104px;
    padding: 0;
  }

  .build-timeline li::before,
  .build-timeline li:nth-child(4)::before {
    top: 42px;
    bottom: 0;
    left: 20px;
    display: block;
    width: 1px;
    height: auto;
  }

  .build-timeline li:last-child::before {
    display: none;
  }

  .build-timeline p {
    max-width: none;
    margin: 10px 0 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-art {
    transform: none;
  }
}