/* Case study detail: approved light editorial system. */
body.single-zhiyu_case {
  --case-canvas: #f4f6f8;
  --case-paper: #fff;
  --case-ink: #101828;
  --case-muted: #667085;
  --case-blue: #1769e0;
  --case-line: #dfe4ea;
  --case-night: #0b1324;
  background: var(--case-canvas);
  color: var(--case-ink);
}

body.single-zhiyu_case .site-main { background: var(--case-canvas); }

body.single-zhiyu_case .site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  padding: 16px 0 0;
  border: 0;
  background: linear-gradient(180deg, rgba(244,246,248,.94), rgba(244,246,248,0));
}
body.admin-bar.single-zhiyu_case .site-header { top: 32px; }
body.single-zhiyu_case .header-inner {
  width: min(1080px, calc(100vw - 56px));
  max-width: none;
  height: 68px;
  min-height: 0;
  padding: 0 16px 0 22px;
  border: 1px solid rgba(255,255,255,.82);
  border-radius: 36px;
  background: rgba(250,252,255,.76);
  box-shadow: 0 14px 40px rgba(24,38,62,.09), inset 0 1px rgba(255,255,255,.9);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
}
body.single-zhiyu_case .brand,
body.single-zhiyu_case .menu a,
body.single-zhiyu_case .language-switcher a { color: var(--case-ink); }
body.single-zhiyu_case .brand-mark { font-size: 1.45rem; letter-spacing: -.04em; }
body.single-zhiyu_case .brand-descriptor { color: var(--case-muted); }
body.single-zhiyu_case .menu a:hover,
body.single-zhiyu_case .menu a:focus-visible,
body.single-zhiyu_case .language-switcher a:hover,
body.single-zhiyu_case .language-switcher a:focus-visible { color: var(--case-blue); }
body.single-zhiyu_case .button-light {
  border-color: var(--case-night);
  background: var(--case-night);
  color: #fff;
}
body.single-zhiyu_case .button-light:hover,
body.single-zhiyu_case .button-light:focus-visible {
  border-color: var(--case-blue);
  background: var(--case-blue);
  color: #fff;
}

body.single-zhiyu_case .case-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(110px,13vw,190px) 0 clamp(88px,10vw,150px);
  border-bottom: 1px solid var(--case-line);
  background:
    radial-gradient(circle at 83% 12%, rgba(23,105,224,.14), transparent 28%),
    radial-gradient(circle at 12% 88%, rgba(110,231,183,.10), transparent 24%),
    linear-gradient(180deg,#fbfcfd 0%,var(--case-canvas) 100%);
  color: var(--case-ink);
}
body.single-zhiyu_case .case-hero::after {
  position: absolute;
  right: -9vw;
  bottom: -38vw;
  width: min(68vw,980px);
  aspect-ratio: 1;
  border: 1px solid rgba(23,105,224,.14);
  border-radius: 50%;
  box-shadow: 0 0 0 8vw rgba(255,255,255,.22), 0 0 0 18vw rgba(23,105,224,.025);
  content: "";
  pointer-events: none;
}
body.single-zhiyu_case .case-hero-grid {
  position: relative;
  z-index: 1;
  grid-template-columns: minmax(0,1.25fr) minmax(280px,.55fr);
  gap: clamp(64px,10vw,170px);
  align-items: end;
}
body.single-zhiyu_case .case-hero .eyebrow {
  margin-bottom: 28px;
  color: var(--case-blue);
  font-size: .72rem;
  letter-spacing: .18em;
}
body.single-zhiyu_case .case-hero h1 {
  max-width: 11ch;
  margin: 0;
  color: var(--case-ink);
  font-size: clamp(4rem,8.2vw,8.4rem);
  font-weight: 500;
  line-height: .9;
  letter-spacing: -.065em;
}
body.single-zhiyu_case .case-hero .hero-copy {
  max-width: 680px;
  margin-top: 36px;
  color: var(--case-muted);
  font-size: clamp(1rem,1.25vw,1.22rem);
  line-height: 1.7;
}
body.single-zhiyu_case .confidentiality-note {
  max-width: 680px;
  margin-top: 28px;
  padding: 18px 22px;
  border: 1px solid rgba(23,105,224,.16);
  border-left: 3px solid var(--case-blue);
  border-radius: 0 16px 16px 0;
  background: rgba(255,255,255,.72);
  color: var(--case-muted);
  font-size: .94rem;
}
body.single-zhiyu_case .case-meta {
  margin: 0;
  border-top: 1px solid var(--case-line);
  color: var(--case-ink);
}
body.single-zhiyu_case .case-meta div { padding: 24px 0; border-bottom-color: var(--case-line); }
body.single-zhiyu_case .case-meta dt {
  margin-bottom: 8px;
  color: var(--case-blue);
  font-size: .68rem;
  letter-spacing: .16em;
}
body.single-zhiyu_case .case-meta dd { color: var(--case-ink); font-size: 1.08rem; }

body.single-zhiyu_case .case-media {
  margin-top: 0;
  padding: clamp(62px,8vw,112px) 0;
  background: var(--case-canvas);
}
body.single-zhiyu_case .case-media img,
body.single-zhiyu_case .case-fallback-wide {
  width: 100%;
  min-height: clamp(360px,54vw,780px);
  border: 1px solid rgba(16,24,40,.08);
  border-radius: clamp(22px,2.4vw,36px);
  box-shadow: 0 30px 80px rgba(16,24,40,.12);
}
body.single-zhiyu_case .case-media img { display: block; object-fit: cover; }
body.single-zhiyu_case .case-fallback-wide {
  background: linear-gradient(135deg,rgba(255,255,255,.92),rgba(234,242,255,.86));
}
body.single-zhiyu_case .case-fallback i { border-color: rgba(23,105,224,.2); background: rgba(255,255,255,.52); }
body.single-zhiyu_case .case-fallback i:nth-child(2) { background: rgba(223,235,255,.72); }
body.single-zhiyu_case .case-fallback i:nth-child(3) { background: var(--case-blue); }

body.single-zhiyu_case .section,
body.single-zhiyu_case .article-body,
body.single-zhiyu_case .evidence-section,
body.single-zhiyu_case .architecture-section {
  padding: clamp(88px,10vw,150px) 0;
  background: var(--case-canvas);
  color: var(--case-ink);
}
body.single-zhiyu_case .section + .section,
body.single-zhiyu_case .section + .architecture-section,
body.single-zhiyu_case .architecture-section + .evidence-section,
body.single-zhiyu_case .evidence-section + .section { border-top: 1px solid var(--case-line); }
body.single-zhiyu_case .section .eyebrow,
body.single-zhiyu_case .article-body .eyebrow,
body.single-zhiyu_case .evidence-section .eyebrow,
body.single-zhiyu_case .architecture-section .eyebrow { color: var(--case-blue); }
body.single-zhiyu_case .case-narrative {
  grid-template-columns: minmax(180px,.5fr) minmax(0,1.5fr);
  gap: clamp(48px,9vw,150px);
}
body.single-zhiyu_case .case-narrative--skills {
  grid-template-columns: minmax(0,1.25fr) minmax(260px,.75fr);
  gap: clamp(48px,6vw,88px);
  align-items: start;
}
body.single-zhiyu_case .case-narrative--skills > div { min-width: 0; }
body.single-zhiyu_case .case-narrative.case-narrative--skills h2 {
  max-width: 100%;
  font-size: clamp(2.4rem,3.45vw,4rem);
  overflow-wrap: break-word;
}
body.single-zhiyu_case .case-narrative > div:last-child,
body.single-zhiyu_case .split-heading .prose { padding-top: 26px; border-top: 1px solid var(--case-line); }
body.single-zhiyu_case .case-narrative h2,
body.single-zhiyu_case .split-heading h2,
body.single-zhiyu_case .architecture-section h2,
body.single-zhiyu_case .evidence-section h2 {
  color: var(--case-ink);
  font-weight: 500;
  letter-spacing: -.045em;
}
body.single-zhiyu_case .case-narrative h2,
body.single-zhiyu_case .split-heading h2 { font-size: clamp(2.5rem,5vw,5rem); line-height: .98; }
body.single-zhiyu_case .prose,
body.single-zhiyu_case .section-forest .prose,
body.single-zhiyu_case .content-copy {
  color: var(--case-muted);
  font-size: clamp(1rem,1.2vw,1.18rem);
  line-height: 1.78;
}

body.single-zhiyu_case .section-forest {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg,#eef5ff 0%,#f8fafc 62%,#edf8f5 100%);
  color: var(--case-ink);
}
body.single-zhiyu_case .section-forest::after {
  position: absolute;
  top: -220px;
  right: -160px;
  width: 520px;
  height: 520px;
  border: 1px solid rgba(23,105,224,.12);
  border-radius: 50%;
  content: "";
  pointer-events: none;
}
body.single-zhiyu_case .split-heading {
  position: relative;
  z-index: 1;
  grid-template-columns: minmax(230px,.8fr) minmax(0,1.2fr);
  gap: clamp(50px,9vw,150px);
}
body.single-zhiyu_case .principle-grid,
body.single-zhiyu_case .evidence-grid {
  grid-template-columns: repeat(3,minmax(0,1fr));
  gap: 18px;
  border: 0;
  background: transparent;
}
body.single-zhiyu_case .principle-grid { margin-top: 60px; }
body.single-zhiyu_case .principle-card,
body.single-zhiyu_case .evidence-card {
  padding: 32px;
  border: 1px solid rgba(16,24,40,.08);
  border-radius: 24px;
  background: rgba(255,255,255,.84);
  box-shadow: 0 18px 48px rgba(16,24,40,.06);
}
body.single-zhiyu_case .principle-grid > article,
body.single-zhiyu_case .evidence-grid > article {
  color: var(--case-ink);
  background: rgba(255,255,255,.84);
}
body.single-zhiyu_case .principle-card {
  min-height: 230px;
  transition: transform 240ms ease, box-shadow 240ms ease;
}
body.single-zhiyu_case .principle-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 26px 62px rgba(16,24,40,.1);
}
body.single-zhiyu_case .principle-index { color: var(--case-blue); }
body.single-zhiyu_case .principle-card h3,
body.single-zhiyu_case .principle-card p { color: var(--case-ink); }
body.single-zhiyu_case .principle-card p { color: var(--case-muted); }

body.single-zhiyu_case .architecture-section { background: var(--case-paper); }
body.single-zhiyu_case .architecture-section img {
  display: block;
  width: 100%;
  margin-top: 42px;
  border: 1px solid var(--case-line);
  border-radius: 28px;
  box-shadow: 0 26px 70px rgba(16,24,40,.1);
}
body.single-zhiyu_case .evidence-section { background: #eef2f6; }
body.single-zhiyu_case .evidence-grid { margin-top: 48px; }
body.single-zhiyu_case .evidence-card { min-height: 250px; background: var(--case-paper); }
body.single-zhiyu_case .evidence-card h3 { color: var(--case-ink); }
body.single-zhiyu_case .evidence-card p { color: var(--case-muted); }
body.single-zhiyu_case .evidence-card strong {
  color: var(--case-blue);
  font-family: inherit;
  font-size: clamp(2rem,3.5vw,4rem);
  font-weight: 500;
  letter-spacing: -.05em;
}
body.single-zhiyu_case .check-list li {
  position: relative;
  padding: 20px 0 20px 28px;
  border-bottom: 1px solid var(--case-line);
  color: var(--case-ink);
}
body.single-zhiyu_case .check-list li::before {
  position: absolute;
  top: 29px;
  left: 2px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--case-blue);
  content: "";
}
body.single-zhiyu_case .tool-list span {
  border: 1px solid var(--case-line);
  border-radius: 999px;
  background: var(--case-paper);
  color: var(--case-ink);
}

body.single-zhiyu_case .cta-section { padding: clamp(72px,9vw,128px) 0; background: var(--case-canvas); }
body.single-zhiyu_case .cta-panel {
  border-radius: clamp(24px,3vw,40px);
  background: radial-gradient(circle at 85% 20%,rgba(23,105,224,.42),transparent 25%),var(--case-night);
  color: #fff;
}
body.single-zhiyu_case .cta-panel h2,
body.single-zhiyu_case .cta-panel p { color: #fff; }
body.single-zhiyu_case .cta-panel .button-light { border-color: #fff; background: #fff; color: var(--case-night); }
body.single-zhiyu_case .site-footer { border-top: 0; background: var(--case-night); }
body.single-zhiyu_case :focus-visible { outline-color: var(--case-blue); }

@media (max-width: 980px) {
  body.single-zhiyu_case .case-hero-grid,
  body.single-zhiyu_case .case-narrative,
  body.single-zhiyu_case .split-heading { grid-template-columns: 1fr; gap: 54px; }
  body.single-zhiyu_case .case-meta { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); }
  body.single-zhiyu_case .principle-grid,
  body.single-zhiyu_case .evidence-grid { grid-template-columns: 1fr 1fr; }
  body.single-zhiyu_case .nav-toggle {
    border-color: var(--case-line);
    background: rgba(255,255,255,.86);
    color: var(--case-ink);
  }
  body.single-zhiyu_case .primary-navigation {
    border: 1px solid rgba(255,255,255,.8);
    border-radius: 22px;
    background: rgba(250,251,252,.97);
    box-shadow: 0 22px 55px rgba(16,24,40,.12);
    -webkit-backdrop-filter: blur(22px);
    backdrop-filter: blur(22px);
  }
}
@media (max-width: 782px) { body.admin-bar.single-zhiyu_case .site-header { top: 46px; } }
@media (max-width: 680px) {
  body.single-zhiyu_case .site-header { padding-top: 10px; }
  body.single-zhiyu_case .header-inner {
    width: calc(100vw - 24px);
    height: 62px;
    min-height: 0;
    padding: 8px 8px 8px 18px;
    border-radius: 20px;
  }
  body.single-zhiyu_case .brand-descriptor { display: none; }
  body.single-zhiyu_case .case-hero { padding-top: 86px; }
  body.single-zhiyu_case .case-hero h1 { font-size: clamp(3.4rem,17vw,5.6rem); }
  body.single-zhiyu_case .case-meta,
  body.single-zhiyu_case .principle-grid,
  body.single-zhiyu_case .evidence-grid { grid-template-columns: 1fr; }
  body.single-zhiyu_case .case-media img,
  body.single-zhiyu_case .case-fallback-wide { min-height: 280px; }
  body.single-zhiyu_case .principle-card,
  body.single-zhiyu_case .evidence-card { min-height: auto; }
}
@media (prefers-reduced-motion: reduce) {
  body.single-zhiyu_case .principle-card { transition: none; }
}