/* Unified Chinese case-study detail pages. */
.case-detail-main {
  --case-green: #4dbb6d;
  --case-green-dark: #297e57;
  --case-ink: #22354a;
  --case-copy: #53636f;
  --case-soft: #f3f7f5;
  overflow: hidden;
  color: var(--case-ink);
}

.case-detail-container {
  width: min(1140px, calc(100% - 48px));
  margin-right: auto;
  margin-left: auto;
}
.case-detail-hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 650px;
  background-position: center;
  background-size: cover;
}

.case-detail-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 22, 29, 0.22) 0%, rgba(10, 22, 29, 0.78) 100%);
}

.case-detail-hero > .case-detail-container {
  position: relative;
  z-index: 1;
  display: flex;
  min-height: inherit;
  align-items: center;
  justify-content: center;
}

.case-detail-hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.case-detail-hero h1 {
  margin: 125px 0 0;
  color: #fff;
  font-size: 5.1em;
  font-weight: 800;
  line-height: 1.02;
}

.case-detail-hero-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 28px;
  min-height: 46px;
  padding: 0 24px;
  border-radius: 999px;
  background: #4dbb6d;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  box-shadow: 0 12px 26px rgba(39, 126, 87, 0.28);
}

.case-detail-hero-link:hover,
.case-detail-hero-link:focus,
.case-detail-hero-link:active {
  background: #4dbb6d;
  color: #fff;
  text-decoration: none;
  transform: none;
  box-shadow: 0 12px 26px rgba(39, 126, 87, 0.28);
}

.case-detail-hero-subtitle {
  max-width: 760px;
  margin: 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(17px, 1.8vw, 22px);
  line-height: 1.65;
}

.case-detail-section {
  padding: 92px 0;
  background: #fff;
}

.case-detail-section.is-soft {
  background: var(--case-soft);
}

.case-detail-heading {
  max-width: 900px;
  margin: 0 auto 38px;
  text-align: center;
}

.case-detail-title {
  margin: 0;
  color: var(--case-ink);
  font-size: clamp(30px, 3vw, 42px);
  font-weight: 800;
  line-height: 1.3;
}

.case-detail-subtitle {
  margin: 0;
  color: var(--case-copy);
  font-size: 17px;
  line-height: 1.8;
}

.case-detail-summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.case-detail-copy-card,
.case-detail-result-card,
.case-detail-data-card,
.case-detail-insight-card {
  border: 1px solid rgba(30, 53, 42, 0.09);
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 12px 30px rgba(27, 47, 38, 0.06);
}

.case-detail-copy-card {
  padding: 30px;
}

.case-detail-copy-card h2,
.case-detail-copy-card h3 {
  margin: 0 0 16px;
  color: var(--case-ink);
  font-size: 25px;
  font-weight: 800;
  line-height: 1.4;
}

.case-detail-copy-card p {
  margin: 0;
  color: var(--case-copy);
  font-size: 16px;
  line-height: 1.88;
}

.case-detail-copy-card p + p {
  margin-top: 14px;
}

.case-detail-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 44px;
}

.case-detail-metric {
  display: flex;
  min-height: 132px;
  flex-direction: column;
  justify-content: center;
  padding: 24px 18px;
  border: 1px solid rgba(77, 187, 109, 0.18);
  border-radius: 14px;
  background: #fff;
  text-align: center;
  box-shadow: 0 10px 24px rgba(35, 65, 50, 0.05);
}

.case-detail-metric strong {
  display: block;
  margin-bottom: 9px;
  color: var(--case-green-dark);
  font-size: clamp(27px, 2.6vw, 38px);
  font-weight: 800;
  line-height: 1.05;
}

.case-detail-metric span {
  color: var(--case-copy);
  font-size: 14px;
  line-height: 1.55;
}

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

.case-detail-result-card {
  position: relative;
  min-height: 184px;
  padding: 26px;
  overflow: hidden;
}

.case-detail-result-card::before {
  content: '';
  display: block;
  width: 38px;
  height: 4px;
  margin-bottom: 18px;
  border-radius: 99px;
  background: var(--case-green);
}

.case-detail-result-card h3 {
  margin: 0 0 10px;
  color: var(--case-ink);
  font-size: 19px;
  font-weight: 800;
  line-height: 1.45;
}

.case-detail-result-card p {
  margin: 0;
  color: var(--case-copy);
  font-size: 15px;
  line-height: 1.74;
}

.case-detail-media-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(320px, 0.82fr);
  gap: 28px;
  align-items: stretch;
}

.case-detail-media-layout.case-detail-media-layout-single {
  max-width: 760px;
  grid-template-columns: minmax(0, 1fr);
  margin-inline: auto;
}

.case-detail-media,
.case-detail-image-card {
  overflow: hidden;
  border: 1px solid rgba(30, 53, 42, 0.09);
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 12px 30px rgba(27, 47, 38, 0.06);
}

.case-detail-project-video {
  margin-top: 30px;
}

.case-detail-media-frame {
  aspect-ratio: 16 / 9;
  background: #17242d;
}

.case-detail-media-frame video,
.case-detail-media-frame iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  object-fit: cover;
}

.case-detail-data-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.case-detail-data-card {
  overflow: hidden;
}

.case-detail-data-image {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 260px;
  padding: 18px;
  background: #f5f8f6;
}

.case-detail-data-image img {
  display: block;
  width: auto;
  max-width: 100%;
  height: 100%;
  object-fit: contain;
}

.case-detail-data-copy {
  padding: 24px 26px 28px;
}

.case-detail-data-copy h3 {
  margin: 0 0 16px;
  color: var(--case-ink);
  font-size: 21px;
  font-weight: 800;
}

.case-detail-data-list {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.case-detail-data-list li {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(30, 53, 42, 0.08);
  color: var(--case-copy);
  font-size: 14px;
  line-height: 1.55;
}

.case-detail-data-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.case-detail-data-list strong {
  color: var(--case-ink);
  font-weight: 750;
  text-align: right;
}

.case-detail-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.case-detail-image-card img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 300px;
  object-fit: cover;
}

.case-detail-insights-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.case-detail-interview-list {
  align-items: start;
}

.case-detail-insight-card {
  padding: 0;
  overflow: hidden;
}

.case-detail-interview-toggle {
  display: grid;
  width: 100%;
  grid-template-columns: 34px 1fr 24px;
  gap: 12px;
  align-items: start;
  padding: 24px 26px;
  border: 0;
  background: transparent;
  color: var(--case-ink);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.case-detail-interview-toggle:hover .case-detail-interview-question,
.case-detail-interview-toggle:focus-visible .case-detail-interview-question {
  color: var(--case-green-dark);
}

.case-detail-interview-mark,
.case-detail-insight-card p span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 800;
}

.case-detail-interview-mark {
  background: rgba(77, 187, 109, 0.14);
  color: var(--case-green-dark);
}

.case-detail-interview-question {
  color: var(--case-ink);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.55;
  transition: color 0.18s ease;
}

.case-detail-interview-icon {
  position: relative;
  width: 24px;
  height: 24px;
  margin-top: 5px;
  border-radius: 50%;
  background: rgba(77, 187, 109, 0.13);
}

.case-detail-interview-icon::before,
.case-detail-interview-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 2px;
  border-radius: 99px;
  background: var(--case-green-dark);
  transform: translate(-50%, -50%);
}

.case-detail-interview-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  transition: transform 0.18s ease;
}

.case-detail-interview-item.is-open .case-detail-interview-icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.case-detail-interview-body {
  padding: 0 26px 26px;
}

.case-detail-insight-card p {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  margin: 0;
  color: var(--case-copy);
  font-size: 15px;
  line-height: 1.78;
}

.case-detail-insight-card p span {
  background: var(--case-green-dark);
  color: #fff;
}

@media (max-width: 991.98px) {
  .case-detail-hero {
    min-height: 550px;
  }

  .case-detail-hero h1 {
    font-size: 3.9em;
    margin-top: 105px;
  }

  .case-detail-summary-grid,
  .case-detail-media-layout {
    grid-template-columns: 1fr;
  }

  .case-detail-results-grid,
  .case-detail-insights-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 767.98px) {
  .case-detail-container {
    width: min(100% - 40px, 560px);
  }

  .case-detail-section {
    padding: 66px 0;
  }

  .case-detail-subtitle,
  .case-detail-copy-card p {
    font-size: 15px;
  }

  .case-detail-metrics,
  .case-detail-results-grid,
  .case-detail-data-grid,
  .case-detail-gallery,
  .case-detail-insights-grid {
    grid-template-columns: 1fr;
  }

  .case-detail-metric {
    display: grid;
    grid-template-columns: 110px 1fr;
    align-items: center;
    min-height: 0;
    padding: 18px;
    text-align: left;
  }

  .case-detail-metric strong {
    margin-bottom: 0;
  }

  .case-detail-result-card {
    min-height: 0;
  }

  .case-detail-data-list li {
    display: grid;
    gap: 4px;
  }

  .case-detail-data-list strong {
    text-align: left;
  }

  .case-detail-image-card img {
    min-height: 220px;
  }
}

@media (max-width: 575px) {
  .case-detail-hero {
    min-height: 500px;
  }

  .case-detail-hero h1 {
    font-size: 3em;
    margin-top: 82px;
  }

  .case-detail-hero-link {
    min-height: 42px;
    padding: 0 20px;
    font-size: 14px;
  }
}