/* v4 case showcase: compact reference-style stage with a useful visual focus. */
.case-stage-v4 {
  grid-template-columns: minmax(0, 1.68fr) minmax(340px, .92fr) !important;
  min-height: 456px !important;
  background: #f5f7fa !important;
  overflow: hidden;
}
.case-stage-v4 .case-photo {
  position: relative;
  min-height: 456px;
  overflow: hidden;
  isolation: isolate;
  background: #25303a;
}
.case-stage-v4 .case-visual-bg,
.case-stage-v4 .case-visual-wash {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.case-stage-v4 .case-visual-bg {
  z-index: -3;
  object-fit: cover;
  object-position: center;
  filter: saturate(.9);
  transform: scale(1.03);
}
.case-stage-v4 .case-visual-wash {
  z-index: -2;
  background: linear-gradient(90deg, rgba(16, 24, 34, .14), rgba(16, 24, 34, .3));
}
.case-stage-v4 .case-visual-label {
  position: absolute;
  top: 28px;
  left: 30px;
  z-index: 2;
  display: grid;
  gap: 4px;
  color: rgba(255,255,255,.9);
  text-shadow: 0 1px 8px rgba(0,0,0,.2);
}
.case-stage-v4 .case-visual-label span {
  font: 10px/1.2 Arial, sans-serif;
  letter-spacing: 2px;
}
.case-stage-v4 .case-visual-label strong {
  font-size: 14px;
  font-weight: 500;
}
.case-stage-v4 .case-visual-detail {
  position: absolute;
  z-index: 1;
  right: 8%;
  bottom: -4%;
  width: min(62%, 520px);
  height: auto;
  display: block;
  filter: drop-shadow(0 18px 22px rgba(10, 22, 36, .27));
  transition: transform .35s ease;
}
.case-stage-v4 .case-visual-qr {
  position: absolute;
  z-index: 2;
  left: 30px;
  bottom: 28px;
  width: 76px;
  height: 76px;
  object-fit: contain;
  border-radius: 50%;
  box-shadow: 0 7px 18px rgba(0,0,0,.2);
}
.case-stage-v4:hover .case-visual-detail {
  transform: translateY(-5px);
}
.case-stage-v4 .case-info {
  min-width: 0;
  padding: 34px 38px 30px !important;
  background: #f5f7fa;
}
.case-stage-v4 .case-info h3 {
  max-width: 330px;
  margin: 16px 0 12px;
  font-size: 27px;
  line-height: 1.45;
  font-weight: 500;
}
.case-stage-v4 .case-info > p {
  max-width: 340px;
  margin: 0;
  color: #71777e;
  font-size: 14px;
  line-height: 1.85;
}
.case-stage-v4 .case-numbers {
  gap: 28px;
  margin-top: 28px;
}
.case-stage-v4 .case-numbers b {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 18px;
  font-weight: 600;
  color: var(--blue);
}
.case-stage-v4 .case-numbers span {
  font-size: 12px;
}
.case-stage-v4 .case-nav {
  margin-top: 26px;
}
.case-stage-v4 .case-detail-link {
  display: inline-flex;
  margin-top: 20px;
  color: var(--blue);
  font-size: 13px;
}
.case-stage-v4 .case-qr[hidden] {
  display: none;
}
@media (max-width: 850px) {
  .case-stage-v4 {
    grid-template-columns: 1fr !important;
  }
  .case-stage-v4 .case-photo {
    min-height: 380px;
  }
  .case-stage-v4 .case-info {
    padding: 30px 30px 32px !important;
  }
}
@media (max-width: 560px) {
  .case-stage-v4 .case-photo {
    min-height: 286px;
    height: 286px;
  }
  .case-stage-v4 .case-visual-label {
    top: 18px;
    left: 18px;
  }
  .case-stage-v4 .case-visual-label strong {
    font-size: 12px;
  }
  .case-stage-v4 .case-visual-detail {
    right: -2%;
    bottom: -4%;
    width: 78%;
  }
  .case-stage-v4 .case-visual-qr {
    left: 18px;
    bottom: 18px;
    width: 58px;
    height: 58px;
  }
  .case-stage-v4 .case-info {
    padding: 24px 22px 28px !important;
  }
  .case-stage-v4 .case-info h3 {
    max-width: none;
    margin-top: 14px;
    font-size: 23px;
    line-height: 1.5;
  }
  .case-stage-v4 .case-info > p {
    max-width: none;
    font-size: 13px;
  }
  .case-stage-v4 .case-numbers {
    gap: 24px;
    margin-top: 22px;
  }
  .case-stage-v4 .case-numbers b {
    font-size: 16px;
  }
  .case-stage-v4 .case-numbers span {
    font-size: 11px;
  }
}