:root {
  --bg-black: #000000;
  --bg-dark: #1d1d1f;
  --bg-light: #f5f5f7;
  --bg-white: #ffffff;
  --surface-card-light: #ffffff;
  --surface-card-dark: rgba(255, 255, 255, 0.04);
  --text-primary: #1d1d1f;
  --text-secondary: rgba(29, 29, 31, 0.8);
  --text-tertiary: rgba(29, 29, 31, 0.48);
  --text-white: #ffffff;
  --text-white-secondary: rgba(255, 255, 255, 0.76);
  --text-white-tertiary: rgba(255, 255, 255, 0.48);
  --accent: #0071e3;
  --accent-strong: #0077ed;
  --accent-light: #2997ff;
  --accent-link: #0066cc;
  --accent-soft: rgba(0, 113, 227, 0.08);
  --border-light: rgba(29, 29, 31, 0.06);
  --border-dark: rgba(255, 255, 255, 0.06);
  --shadow-card: 3px 5px 30px rgba(0, 0, 0, 0.22);
  --radius-xs: 5px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-pill: 980px;
  --container: 1280px;
  --container-wide: 1480px;
  --container-text: 1080px;
  --nav-height: 48px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-hero: cubic-bezier(0.28, 0.11, 0.32, 1);
  --font-display: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Inter', 'Noto Sans SC', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  --font-text: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-text);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.47;
  letter-spacing: -0.374px;
  color: var(--text-primary);
  background: var(--bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; border: none; padding: 0; background: none; cursor: pointer; }
img { display: block; max-width: 100%; }
ul { margin: 0; padding: 0; }

.site-shell { min-height: 100vh; overflow-x: clip; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

.container-wide {
  max-width: var(--container-wide);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 140;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, rgba(41, 151, 255, 0.82), rgba(0, 113, 227, 1));
  box-shadow: 0 0 18px rgba(41, 151, 255, 0.24);
  transform-origin: left center;
  transition: width 0.14s linear, opacity 0.3s ease;
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: saturate(180%) blur(24px);
  -webkit-backdrop-filter: saturate(180%) blur(24px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.02);
  transition: background 0.36s var(--ease-out), border-color 0.36s var(--ease-out), box-shadow 0.36s var(--ease-out), transform 0.36s var(--ease-out);
}

.topbar.scrolled {
  background: rgba(0, 0, 0, 0.84);
  border-bottom-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.22), inset 0 -1px 0 rgba(255, 255, 255, 0.04);
}

.topbar-inner {
  width: 100%;
  max-width: var(--container);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-white);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  transition: opacity 0.28s ease, transform 0.28s ease;
}

.brand:hover {
  opacity: 0.96;
  transform: translateY(-1px);
}

.brand-mark {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-white);
  box-shadow: 0 0 0 6px rgba(255, 255, 255, 0.02);
  transition: background 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav a {
  position: relative;
  font-size: 12px;
  line-height: 1;
  letter-spacing: -0.12px;
  color: rgba(255, 255, 255, 0.78);
  transition: color 0.3s var(--ease-out), opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.nav a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -8px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.3s var(--ease-out);
  opacity: 0.85;
}

.nav a:hover,
.nav a.active {
  color: var(--text-white);
  transform: translateY(-1px);
}

.nav a:hover::after,
.nav a.active::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  position: relative;
  color: var(--text-white);
}

.nav-toggle span {
  position: absolute;
  left: 11px;
  width: 20px;
  height: 1.5px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.3s var(--ease-out), top 0.3s var(--ease-out);
}

.nav-toggle span:first-child { top: 16px; }
.nav-toggle span:last-child { top: 24px; }

.nav-toggle.open span:first-child {
  top: 20px;
  transform: rotate(45deg);
}

.nav-toggle.open span:last-child {
  top: 20px;
  transform: rotate(-45deg);
}

.mobile-panel {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  z-index: 110;
  padding: 0 18px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  transition: max-height 0.35s var(--ease-out), opacity 0.3s ease, padding 0.35s var(--ease-out);
}

.mobile-panel.open {
  max-height: 420px;
  opacity: 1;
  padding: 10px 18px 18px;
}

.mobile-nav {
  flex-direction: column;
  align-items: stretch;
  gap: 0;
}

.mobile-nav a {
  width: 100%;
  padding: 14px 0;
  font-size: 16px;
  color: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.mobile-nav a:last-child { border-bottom: none; }

.section,
.signal-strip {
  position: relative;
  overflow: hidden;
}

.section-dark {
  background: var(--bg-black);
  color: var(--text-white);
}

.section-light,
.section-soft {
  background: var(--bg-light);
  color: var(--text-primary);
}

.section-heading {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: end;
  gap: 18px 40px;
  margin-bottom: 36px;
}

.section-heading::before {
  content: attr(data-index);
  position: absolute;
  right: 0;
  top: -4px;
  font-family: var(--font-display);
  font-size: clamp(56px, 9vw, 128px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.06em;
  color: currentColor;
  opacity: 0.05;
  pointer-events: none;
  user-select: none;
}

.section-heading > .eyebrow,
.section-heading > h2,
.section-heading > .section-meta {
  position: relative;
  z-index: 1;
}

.section-meta {
  max-width: 52ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.section-dark .section-meta { color: rgba(255, 255, 255, 0.7); }

.compact-heading { margin-bottom: 24px; }

.section-heading h2 {
  margin: 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-size: clamp(30px, 3.8vw, 52px);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.018em;
}

.section-dark .section-heading h2 { color: var(--text-white); }

.eyebrow {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-dark .eyebrow { color: rgba(255, 255, 255, 0.5); }
.section-light .eyebrow,
.section-soft .eyebrow { color: var(--text-tertiary); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 140px;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.374px;
  position: relative;
  overflow: hidden;
  transition: background 0.32s var(--ease-out), border-color 0.32s var(--ease-out), color 0.32s var(--ease-out), transform 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
  will-change: transform;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 1px;
  border-radius: inherit;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.16), transparent 34%, transparent 66%, rgba(255, 255, 255, 0.1));
  opacity: 0;
  transition: opacity 0.32s var(--ease-out);
  pointer-events: none;
}

.btn:hover::after {
  opacity: 1;
}

.btn-primary {
  background: var(--accent);
  color: var(--text-white);
}

.btn-primary:hover {
  background: var(--accent-strong);
  transform: translateY(-2px);
  box-shadow: 0 16px 28px rgba(0, 113, 227, 0.28);
}

.btn-secondary {
  border: 1px solid rgba(255, 255, 255, 0.28);
  color: var(--text-white);
  background: transparent;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.58);
  transform: translateY(-2px);
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  letter-spacing: -0.12px;
}

.section-dark .pill {
  color: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
}

.section-light .pill,
.section-soft .pill {
  color: var(--text-secondary);
  border: 1px solid rgba(29, 29, 31, 0.12);
  background: rgba(29, 29, 31, 0.04);
}

.pill-muted {
  color: rgba(255, 255, 255, 0.5) !important;
  border-color: rgba(255, 255, 255, 0.08) !important;
  background: rgba(255, 255, 255, 0.02) !important;
}

.interactive-surface {
  position: relative;
  isolation: isolate;
  transform-style: preserve-3d;
  transition: transform 0.36s var(--ease-out), background 0.36s var(--ease-out), border-color 0.36s ease, box-shadow 0.36s ease;
}

.interactive-surface::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: radial-gradient(
    220px circle at var(--pointer-x, 50%) var(--pointer-y, 50%),
    rgba(255, 255, 255, 0.09),
    transparent 46%
  );
  opacity: 0;
  transition: opacity 0.32s var(--ease-out);
  z-index: 1;
}

.section-dark .interactive-surface::after {
  background: radial-gradient(
    220px circle at var(--pointer-x, 50%) var(--pointer-y, 50%),
    rgba(41, 151, 255, 0.08),
    transparent 48%
  );
}

.interactive-surface:hover {
  transform: translateY(-4px) scale(1.002);
}

.interactive-surface:hover::after { opacity: 1; }

.interactive-surface > * { position: relative; z-index: 2; }

.hero {
  position: relative;
  min-height: calc(100vh - var(--nav-height));
  padding: 104px 0 76px;
  display: flex;
  align-items: center;
  background: var(--bg-black);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: auto 10% 10% auto;
  width: min(520px, 42vw);
  height: min(520px, 42vw);
  background: radial-gradient(
    circle at var(--hero-glow-x, 70%) var(--hero-glow-y, 36%),
    rgba(41, 151, 255, 0.16),
    rgba(41, 151, 255, 0.08) 30%,
    transparent 66%
  );
  filter: blur(18px);
  transform: translateY(var(--hero-glow-shift, 0px));
  opacity: 0.9;
  pointer-events: none;
  z-index: 0;
  transition: transform 0.5s ease, opacity 0.4s ease, background 0.4s ease;
}

.hero::after {
  content: '';
  position: absolute;
  inset: auto 32px 28px 32px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.12), transparent);
  pointer-events: none;
  z-index: 0;
}

.hero > .container { position: relative; z-index: 1; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.72fr);
  gap: 44px;
  align-items: center;
}

.hero-copy {
  max-width: 640px;
  opacity: var(--hero-copy-opacity, 1);
  transform: translate3d(0, var(--hero-copy-shift, 0px), 0);
  transition: transform 0.45s var(--ease-out), opacity 0.4s ease;
}

.hero-nameplate {
  position: relative;
  display: grid;
  gap: 6px;
  width: fit-content;
  margin: 8px 0 24px;
  padding: 0;
  border-radius: 0;
  background: transparent;
  overflow: visible;
  transition: transform 0.45s var(--ease-out), opacity 0.4s ease;
}

.hero-nameplate::after { display: none; }

.hero-nameplate-label {
  position: relative;
  z-index: 1;
  font-size: 12px;
  line-height: 1.2;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.52);
}

.hero-nameplate-main {
  position: relative;
  z-index: 1;
  font-family: var(--font-display);
  font-size: clamp(40px, 5vw, 60px);
  line-height: 1.03;
  letter-spacing: -0.03em;
  color: #ffffff;
  text-shadow: 0 12px 28px rgba(0, 0, 0, 0.26);
}

.hero-nameplate-sub {
  position: relative;
  z-index: 1;
  font-size: 14px;
  line-height: 1.45;
  letter-spacing: -0.12px;
  color: rgba(255, 255, 255, 0.64);
}

.hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(40px, 5.3vw, 56px);
  font-weight: 600;
  line-height: 1.07;
  letter-spacing: -0.28px;
  color: var(--text-white);
  text-wrap: balance;
  transition: transform 0.45s var(--ease-out), text-shadow 0.45s var(--ease-out);
}

.hero-description {
  max-width: 32ch;
  margin-top: 16px;
  font-size: 21px;
  line-height: 1.19;
  letter-spacing: 0.231px;
  color: var(--text-white-secondary);
  transition: transform 0.45s var(--ease-out), opacity 0.45s ease;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
  transition: transform 0.45s var(--ease-out), opacity 0.45s ease;
}

.hero-meta,
.hero-tags,
.hero-proof-grid,
.hero-notes,
.hero-side-story,
.hero-panel-bottom {
  display: none;
}

.hero-side {
  display: grid;
  gap: 14px;
  opacity: var(--hero-side-opacity, 1);
  will-change: transform;
  transition: transform 0.5s var(--ease-out), opacity 0.45s ease;
}

.hero-panel {
  padding: 24px;
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 24px 40px rgba(0, 0, 0, 0.2);
}

.hero-panel-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.44);
}

.hero-panel-main {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin: 18px 0 0;
}

.hero-panel-main strong {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1.1;
  color: var(--text-white);
}

.hero-panel-main p,
.hero-client-block p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.7);
}

.view-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.contact-note {
  margin-top: 2px;
  background: var(--surface-card-light);
  border: none;
}

.contact-note p {
  margin: 0;
  color: var(--text-secondary);
}

.hero-client-block {
  margin-top: 12px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.insight-card {
  padding: 18px;
  background: rgba(255, 255, 255, 0.04);
}

.signal-strip {
  padding: 28px 0 32px;
}

.signal-grid,
.fit-grid,
.metrics-grid,
.capability-grid,
.output-grid,
.ai-grid,
.collaboration-grid,
.case-grid,
.opportunity-grid {
  display: grid;
  gap: 18px;
}

.signal-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.signal-card,
.fit-card,
.metric-card,
.capability-card,
.output-card,
.ai-card,
.collab-card,
.case-card,
.contact-card,
.mini-info-card,
.opportunity-card {
  position: relative;
  padding: 20px 22px;
  border-radius: var(--radius-md);
}

.signal-card,
.fit-card,
.metric-card,
.output-card,
.ai-card,
.collab-card,
.case-card,
.contact-card,
.mini-info-card,
.about-summary,
.workflow-panel,
.ai-summary,
.collaboration-map,
.view-panel,
.opportunity-card {
  background: var(--surface-card-light);
  border: none;
  box-shadow: none;
}

.signal-card span,
.fit-index,
.cap-index,
.method-step,
.ai-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 34px;
  padding: 0 10px;
  border-radius: var(--radius-pill);
  background: rgba(29, 29, 31, 0.04);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
}

.signal-card strong,
.fit-card h3,
.metric-card h3,
.capability-card h3,
.output-card h3,
.ai-card h3,
.collab-card h3,
.case-card h3,
.opportunity-card h3,
.view-panel h3,
.workflow-panel h3,
.experience-head h3,
.contact-card strong,
.mini-info-card strong {
  font-family: var(--font-display);
}

.signal-card strong,
.fit-card h3,
.metric-card h3,
.capability-card h3,
.output-card h3,
.ai-card h3,
.collab-card h3,
.case-card h3,
.opportunity-card h3 {
  display: block;
  margin: 14px 0 8px;
  font-size: 21px;
  line-height: 1.19;
  letter-spacing: -0.01em;
  font-weight: 600;
}

.signal-card p,
.fit-card p,
.metric-card p,
.capability-card p,
.output-card p,
.ai-card p,
.collab-card p,
.case-card p,
.opportunity-card p,
.contact-card span,
.about-summary p,
.ai-summary p,
.view-grid p,
.workflow-panel p,
.workflow-panel li,
.collaboration-map li,
.experience-block li,
.role-note,
.case-lead {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.section-dark .capability-card,
.section-dark .experience-card,
.section-dark .experience-block,
.section-dark .opportunity-card,
.section-dark .collaboration-map {
  background: var(--surface-card-dark);
  border: none;
  box-shadow: none;
}

.section-dark .capability-card h3,
.section-dark .opportunity-card h3,
.section-dark .experience-head h3,
.section-dark .experience-block h4,
.section-dark .collaboration-map strong {
  color: var(--text-white);
}

.section-dark .capability-card p,
.section-dark .opportunity-card p,
.section-dark .role-note,
.section-dark .experience-block li,
.section-dark .collaboration-map li {
  color: rgba(255, 255, 255, 0.7);
}

.about-layout,
.metrics-layout,
.method-section,
.experience-section,
#fit,
#capabilities,
#workflow,
#outputs,
#ai,
#collaboration,
#cases,
#viewpoints,
#opportunities,
#contact {
  padding: 56px 0;
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(330px, 0.9fr);
  gap: 22px;
  align-items: start;
}

.about-head { display: grid; gap: 14px; }

.about-points {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.about-point {
  padding: 18px 20px;
  background: var(--surface-card-light);
  border: none;
  border-radius: var(--radius-md);
}

.about-point span {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--text-tertiary);
}

.about-point strong {
  display: block;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.42;
  color: var(--text-primary);
  font-weight: 600;
}


.about-summary {
  padding: 18px 22px;
  display: grid;
  gap: 10px;
}

.about-summary p { max-width: 44ch; }

.about-summary p + p,
.ai-summary p + p { margin-top: 0; }

.about-side-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.mini-info-card span,
.contact-card span {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--text-tertiary);
}

.mini-info-card strong,
.contact-card strong {
  font-size: 18px;
  line-height: 1.35;
  font-weight: 600;
}

.fit-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.dense-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.metric-value {
  font-family: var(--font-display);
  font-size: clamp(36px, 4vw, 52px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  font-weight: 600;
  white-space: nowrap;
}

.metric-title-tight {
  text-wrap: nowrap !important;
}

.capability-grid-6 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.workflow-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  align-items: stretch;
}

.workflow-card {
  padding: 20px 18px 18px;
  background: var(--surface-card-light);
  border: none;
  border-radius: var(--radius-md);
  display: grid;
  align-content: start;
  gap: 12px;
}

.workflow-card-head {
  display: grid;
  gap: 10px;
}

.workflow-card-head span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border-radius: var(--radius-pill);
  background: rgba(29, 29, 31, 0.04);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
}

.workflow-card-head strong {
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.18;
  color: var(--text-primary);
  font-weight: 600;
}

.workflow-card p,
.workflow-card li {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.workflow-card ul {
  margin: 0;
  padding-left: 18px;
}

.workflow-card li + li { margin-top: 6px; }

.ai-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 22px;
  align-items: stretch;
}

.ai-visual {
  padding: 0;
  background: var(--bg-light);
  border: none;
  border-radius: var(--radius-md);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.8) inset,
    0 0 0 1px rgba(29, 29, 31, 0.04),
    0 18px 40px rgba(29, 29, 31, 0.08),
    0 30px 80px rgba(29, 29, 31, 0.08);
  overflow: hidden;
}

.ai-visual::before { display: none !important; }

.ai-visual.interactive-surface:hover {
  transform: translateY(-2px);
}

.ai-window-bar {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 14px 16px 12px;
  background: linear-gradient(180deg, #f4f4f6, #ececee);
  border-bottom: 1px solid rgba(29, 29, 31, 0.06);
}

.ai-window-bar span.ai-window-dot,
.ai-window-bar > span:not(.ai-window-dot):not(.ai-window-tab-dot) {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  flex: 0 0 11px;
  background: rgba(29, 29, 31, 0.12);
}

.ai-window-dot-red { background: #ff5f57 !important; }
.ai-window-dot-yellow { background: #febc2e !important; }
.ai-window-dot-green { background: #28c840 !important; }

.ai-window-tab {
  margin-left: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px 5px 10px;
  border-radius: 7px;
  background: #ffffff;
  color: rgba(29, 29, 31, 0.72);
  font-size: 12px;
  letter-spacing: 0.01em;
  box-shadow: 0 1px 0 rgba(29, 29, 31, 0.04), 0 0 0 1px rgba(29, 29, 31, 0.04);
}

.ai-window-tab-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 2px rgba(0, 113, 227, 0.16);
  flex: 0 0 6px;
}

.ai-visual-window {
  padding: 0;
  display: grid;
  gap: 0;
}

.ai-visual-head {
  display: grid;
  gap: 8px;
}

.ai-visual-head span {
  font-size: 12px;
  color: var(--text-tertiary);
}

.ai-visual-head strong {
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.12;
  color: var(--text-primary);
  font-weight: 600;
}

.ai-visual-head p {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-secondary);
}

.ai-visual-main {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(240px, 0.8fr);
  gap: 14px;
}

.ai-visual-list {
  display: grid;
  gap: 10px;
}

.ai-visual-list article,
.ai-visual-highlight {
  background: rgba(255, 255, 255, 0.82);
  border: none;
  border-radius: var(--radius-md);
}

.ai-visual-list article {
  padding: 14px 16px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
}

.ai-visual-list em {
  font-style: normal;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 34px;
  padding: 0 10px;
  border-radius: var(--radius-pill);
  background: rgba(29, 29, 31, 0.04);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
}

.ai-visual-list h3,
.ai-visual-highlight strong {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.28;
  color: var(--text-primary);
  font-weight: 600;
}

.ai-visual-list p,
.ai-visual-highlight li {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.ai-visual-highlight {
  padding: 16px;
  display: grid;
  align-content: start;
  gap: 10px;
  background: rgba(255, 255, 255, 0.9);
}

.ai-visual-highlight span {
  font-size: 12px;
  color: var(--text-tertiary);
}

.ai-visual-highlight ul {
  margin: 0;
  padding-left: 18px;
}

.ai-visual-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 16px 16px;
  background: #fafafa;
  border-top: 1px solid rgba(29, 29, 31, 0.06);
}

.ai-visual-chips span {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: var(--radius-pill);
  background: rgba(29, 29, 31, 0.04);
  color: var(--text-secondary);
  font-size: 12px;
}

/* —— AI 区块：把左栏改造成真实工作中的 AI 对话截图 —— */
.ai-app-layout {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 0;
  background: #ffffff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(29, 29, 31, 0.04);
}

.ai-app-sidebar {
  padding: 14px 12px;
  background: #fafafa;
  border-right: 1px solid rgba(29, 29, 31, 0.04);
  display: grid;
  align-content: start;
  gap: 10px;
}

.ai-app-sidebar-head {
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(29, 29, 31, 0.38);
  padding: 2px 8px;
}

.ai-app-sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 3px;
}

.ai-app-sidebar-list li {
  position: relative;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 12px;
  line-height: 1.4;
  color: rgba(29, 29, 31, 0.62);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: background 0.3s var(--ease-out), color 0.3s var(--ease-out);
}

.ai-app-sidebar-list li:hover {
  background: rgba(29, 29, 31, 0.04);
  color: rgba(29, 29, 31, 0.82);
}

.ai-app-sidebar-list li.active {
  background: rgba(0, 113, 227, 0.08);
  color: var(--text-primary);
  font-weight: 600;
}

.ai-app-sidebar-list li.active em {
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 0 2px 2px 0;
  background: var(--accent);
  font-style: normal;
}

.ai-app-sidebar-foot {
  display: flex;
  gap: 6px;
  padding: 6px 8px 0;
  border-top: 1px solid rgba(29, 29, 31, 0.04);
  margin-top: 4px;
}

.ai-app-sidebar-foot span {
  display: block;
  width: 22px;
  height: 4px;
  border-radius: 2px;
  background: rgba(29, 29, 31, 0.06);
}

.ai-app-chat {
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: #ffffff;
}

.ai-chat-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(29, 29, 31, 0.04);
}

.ai-chat-head strong {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.ai-chat-head span {
  font-size: 11px;
  color: rgba(29, 29, 31, 0.38);
}

.ai-chat-stream {
  display: grid;
  gap: 12px;
  padding: 16px;
  max-height: 340px;
  overflow: hidden;
}

.ai-msg {
  display: flex;
  gap: 10px;
  max-width: 92%;
}

.ai-msg-user {
  justify-self: end;
  flex-direction: row-reverse;
}

.ai-msg-bot {
  justify-self: start;
}

.ai-msg-avatar {
  flex: 0 0 26px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  margin-top: 2px;
  background: linear-gradient(135deg, #0a84ff, #5e5ce6 60%, #bf5af2);
  position: relative;
  overflow: hidden;
}

.ai-msg-avatar::after {
  content: '';
  position: absolute;
  inset: 18% 22%;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0) 60%);
}

.ai-msg-body {
  padding: 10px 13px;
  border-radius: 14px;
  font-size: 13px;
  line-height: 1.55;
  letter-spacing: -0.12px;
  max-width: 420px;
}

.ai-msg-user .ai-msg-body {
  background: #1d1d1f;
  color: #ffffff;
  border-bottom-right-radius: 5px;
}

.ai-msg-bot .ai-msg-body {
  background: #f1f1f3;
  color: var(--text-primary);
  border-bottom-left-radius: 5px;
}

.ai-msg-bot .ai-msg-body p {
  margin: 0;
}

.ai-msg-bot .ai-msg-body p + p {
  margin-top: 6px;
}

.ai-msg-bot .ai-msg-body em {
  display: inline-block;
  margin-right: 6px;
  padding: 1px 6px;
  border-radius: 4px;
  background: rgba(0, 113, 227, 0.08);
  color: var(--accent-link);
  font-size: 11px;
  font-style: normal;
  font-weight: 600;
  letter-spacing: 0;
  vertical-align: 1px;
}

.ai-typing {
  display: inline-flex;
  gap: 4px;
  align-items: center;
  padding: 3px 2px;
}

.ai-typing i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(29, 29, 31, 0.4);
  animation: aiTyping 1.2s infinite ease-in-out;
}

.ai-typing i:nth-child(2) { animation-delay: 0.15s; }
.ai-typing i:nth-child(3) { animation-delay: 0.3s; }

@keyframes aiTyping {
  0%, 80%, 100% { transform: translateY(0); opacity: 0.45; }
  40% { transform: translateY(-3px); opacity: 1; }
}

.ai-chat-input {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 0 16px 16px;
  padding: 10px 6px 10px 14px;
  border-radius: var(--radius-pill);
  background: #f5f5f7;
  border: 1px solid rgba(29, 29, 31, 0.05);
}

.ai-chat-input-placeholder {
  font-size: 12px;
  color: rgba(29, 29, 31, 0.42);
  letter-spacing: -0.12px;
}

.ai-chat-input-send {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: #ffffff;
  font-size: 14px;
  line-height: 1;
  box-shadow: 0 6px 14px rgba(0, 113, 227, 0.22);
}

@media (max-width: 980px) {
  .ai-app-layout { grid-template-columns: 1fr; }
  .ai-app-sidebar { display: none; }
  .ai-chat-stream { padding: 14px; max-height: none; }
}

.ai-content {
  display: grid;
  gap: 14px;
  align-content: start;
}

.ai-summary {
  padding: 22px 24px;
}

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

.ai-card span { margin-bottom: 10px; }

.section-heading h2,
.hero-proof-grid strong,
.hero-note-card strong,
.hero-side-story strong,
.ai-visual-head strong,
.ai-visual-highlight strong,
.ai-card h3,
.workflow-card-head strong,
.case-panel-head h3,
.opportunity-card h3,
.fit-card h3,
.metric-card h3,
.capability-card h3,
.output-card h3,
.collab-card h3,
.experience-head h3,
.about-point strong,
.contact-card strong {
  text-wrap: balance;
}

.hero-meta span,
.hero-tags span,
.pill,
.timeline,
.case-tab-body em,
.role-note {
  display: inline-flex;
  align-items: center;
  max-width: 100%;
}

.ai-visual-head strong {
  max-width: 16ch;
}

.ai-summary,
.ai-grid,
.ai-visual-window {
  align-content: start;
}

.ai-summary {
  display: grid;
  gap: 10px;
}

.ai-summary p {
  max-width: 38ch;
}

.ai-card {
  min-height: 186px;
}

.ai-card h3 {
  min-height: 2.6em;
}

.ai-visual-list h3 {
  margin-top: 1px;
}

.ai-visual-list article {
  min-height: 92px;
}

.ai-visual-highlight ul li::marker,
.workflow-card ul li::marker,
.collaboration-map ul li::marker {
  color: rgba(0, 113, 227, 0.7);
}

.experience-block ul {
  margin-top: 14px;
  padding-left: 0;
  list-style: none;
}

.experience-block li {
  position: relative;
  padding-left: 0;
}

.timeline-meter {
  position: absolute;
  top: 10px;
  left: 12px;
  right: 12px;
  height: 42px;
  pointer-events: none;
}

.meter-track,
.meter-progress {
  position: absolute;
  top: 28px;
  left: 0;
  right: 0;
  height: 1px;
  border-radius: 1px;
}

.meter-track {
  background: rgba(255, 255, 255, 0.14);
}

.meter-progress {
  right: auto;
  width: 0%;
  background: var(--accent-light);
  box-shadow: none;
  transition: width 0.18s linear;
}

.meter-node {
  position: absolute;
  top: 6px;
  transform: translateX(-50%);
  display: grid;
  justify-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, 0.44);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color 0.4s var(--ease-out);
}

.meter-node::before {
  content: '';
  grid-row: 2;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
  transition: background 0.4s var(--ease-out), transform 0.4s var(--ease-out);
}

.meter-node em {
  grid-row: 1;
  font-style: normal;
  white-space: nowrap;
}

.meter-node-now {
  color: var(--text-white);
}

.meter-node-now::before {
  background: var(--accent-light);
  transform: translateY(-1px) scale(1.08);
}

.experience-timeline {
  position: relative;
  padding-top: 72px;
}

.experience-stack { display: grid; gap: 18px; }

@media (min-width: 1024px) {
  .experience-stack {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .experience-card {
    padding: 28px 28px 24px;
    transition: transform 0.32s var(--ease-out), background 0.32s ease;
  }

  .experience-card:hover {
    transform: translateY(-2px);
  }
}

.experience-card {
  padding: 24px 24px 22px;
  border-radius: var(--radius-md);
}

.experience-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
  margin-bottom: 16px;
}

.timeline {
  margin: 0 0 6px;
  font-size: 10px;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.18);
}

.experience-head h3 {
  margin: 0;
  font-size: 28px;
  line-height: 1.14;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.experience-head > div,
.case-tab-body {
  min-width: 0;
}

.role-note,
.case-tab-body em {
  overflow: hidden;
  text-overflow: ellipsis;
}

.case-tab-body em {
  white-space: normal;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.role-note {
  white-space: normal;
  display: block;
  max-width: 28ch;
}


.timeline,
.hero-meta span,
.hero-tags span,
.pill {
  white-space: nowrap;
}

.experience-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.experience-block {
  padding: 14px 16px;
  border-radius: var(--radius-md);
}

.experience-block h4 {
  margin: 0 0 10px;
  font-size: 15px;
  color: var(--text-white);
  font-weight: 600;
}

.collaboration-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.collaboration-map {
  margin-top: 14px;
  padding: 24px;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 16px;
}

.collaboration-map strong {
  display: block;
  font-size: 20px;
  line-height: 1.35;
  font-weight: 600;
}

.case-grid.enhanced-case-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.case-browser {
  display: grid;
  grid-template-columns: minmax(300px, 360px) minmax(0, 1fr);
  gap: 24px;
  align-items: stretch;
}

.case-rail-wrap {
  display: grid;
  align-content: start;
  gap: 14px;
}

.case-rail-head {
  padding: 4px 2px 10px;
  display: grid;
  gap: 8px;
}

.case-rail-head span {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.42);
}

.case-rail-head p {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.68);
}

.case-rail {
  display: grid;
  gap: 10px;
  align-content: start;
}

.case-tab {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  text-align: left;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: transform 0.3s var(--ease-out), background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.case-tab:hover {
  transform: translateX(4px);
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.14);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.16);
}

.case-tab-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: background 0.3s ease, color 0.3s ease, transform 0.3s ease;
}

.case-tab-body strong {
  display: block;
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.25;
  color: rgba(255, 255, 255, 0.96);
  font-weight: 600;
}

.case-tab-body em {
  display: block;
  margin-top: 4px;
  font-style: normal;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.54);
}

.case-tab-arrow {
  color: rgba(255, 255, 255, 0.4);
  font-size: 18px;
  transition: transform 0.3s var(--ease-out), color 0.3s var(--ease-out);
}

.case-tab.active {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(41, 151, 255, 0.36);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.22);
}

.case-tab.active .case-tab-index {
  background: rgba(41, 151, 255, 0.18);
  color: #ffffff;
  transform: scale(1.02);
}

.case-tab.active .case-tab-body em,
.case-tab.active .case-tab-arrow {
  color: rgba(255, 255, 255, 0.82);
}

.case-tab.active .case-tab-arrow {
  transform: translateX(4px);
}

.case-stage {
  position: relative;
  min-height: 360px;
}

.case-panel {
  display: none;
  padding: 26px 28px;
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.22);
}


.case-panel.active {
  display: grid;
  gap: 16px;
  animation: panelEnter 0.55s var(--ease-out);
}

.case-panel-head { display: grid; gap: 12px; }

.case-panel-head .pill { justify-self: start; }

.case-panel-head h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1.16;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-white);
}

.case-panel-head .case-lead {
  margin: 0;
  max-width: 62ch;
  color: rgba(255, 255, 255, 0.72);
}

.case-panel-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.case-block {
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
}

.case-block span {
  display: block;
  margin-bottom: 6px;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.52);
  font-weight: 600;
}

.case-block p {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.72);
}

.case-top {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.case-lead { margin: 0; }

.expand-toggle {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.88);
  font-size: 14px;
  transition: background 0.3s var(--ease-out), color 0.3s var(--ease-out);
}

.expand-toggle::after {
  content: '›';
  font-size: 16px;
  transition: transform 0.3s var(--ease-out);
}

.expand-toggle[aria-expanded='true']::after { transform: rotate(90deg); }

.expand-toggle:hover { background: rgba(0, 113, 227, 0.08); }

.expand-region {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.4s var(--ease-out);
}

.expand-region > * { overflow: hidden; }

.expandable-card.expanded .expand-region { grid-template-rows: 1fr; }

.view-switch {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 6px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.9);
  border: none;
}

.view-tab {
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  color: var(--text-tertiary);
  position: relative;
  overflow: hidden;
  transition: background 0.32s var(--ease-out), color 0.32s var(--ease-out), transform 0.32s var(--ease-out), box-shadow 0.32s var(--ease-out);
}

.view-tab::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.3), transparent 42%, transparent 64%, rgba(255, 255, 255, 0.12));
  opacity: 0;
  transition: opacity 0.32s var(--ease-out);
  pointer-events: none;
}

.view-tab:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.06);
}

.view-tab:hover::after,
.view-tab.active::after {
  opacity: 1;
}

.view-tab.active {
  background: var(--accent);
  color: var(--text-white);
  box-shadow: 0 12px 24px rgba(0, 113, 227, 0.2);
}

.view-panels { margin-top: 18px; }

.view-panel {
  display: none;
  padding: 24px;
}

.view-panel.active { display: block; }

.view-panel h3 {
  margin: 0 0 18px;
  font-size: 22px;
  line-height: 1.25;
  color: var(--text-primary);
  font-weight: 600;
}

.opportunity-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.contact-layout {
  display: grid;
  gap: 24px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.contact-card a { color: var(--accent-link); }
.contact-card a:hover { text-decoration: underline; }

.view-grid > div {
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.03);
  display: grid;
  align-content: start;
  gap: 6px;
}

.case-card {
  display: grid;
  gap: 12px;
  align-content: start;
}

.site-footer {
  padding: 28px 0 36px;
  background: var(--bg-black);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.site-footer p,
.back-to-top {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
}

.back-to-top:hover { color: rgba(255, 255, 255, 0.74); }

.reveal {
  opacity: 0;
  transform: translateY(16px);
  filter: blur(6px);
  transition: opacity 0.7s var(--ease-hero), transform 0.7s var(--ease-hero), filter 0.7s var(--ease-hero);
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }

body[data-section='hero'] .brand-mark,
body[data-section='capabilities'] .brand-mark,
body[data-section='experience'] .brand-mark,
body[data-section='opportunities'] .brand-mark {
  background: var(--text-white);
}

body[data-section='signals'] .brand-mark,
body[data-section='about'] .brand-mark,
body[data-section='fit'] .brand-mark,
body[data-section='metrics'] .brand-mark,
body[data-section='workflow'] .brand-mark,
body[data-section='outputs'] .brand-mark,
body[data-section='ai'] .brand-mark,
body[data-section='collaboration'] .brand-mark,
body[data-section='viewpoints'] .brand-mark,
body[data-section='contact'] .brand-mark {
  background: var(--accent);
}

@media (min-width: 1440px) {
  .signal-grid,
  .collaboration-grid,
  .output-grid { gap: 20px; }

  .dense-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .capability-grid-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .view-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

  .section-heading { margin-bottom: 32px; }
  .section-heading h2 { font-size: clamp(32px, 2.6vw, 44px); }

  .about-layout,
  .metrics-layout,
  .method-section,
  .experience-section,
  #fit,
  #capabilities,
  #workflow,
  #outputs,
  #ai,
  #collaboration,
  #cases,
  #viewpoints,
  #opportunities,
  #contact {
    padding: 64px 0;
  }
}


@keyframes panelEnter {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 1023px) {
  .case-browser {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .case-rail {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
  }

  .case-rail::-webkit-scrollbar { display: none; }

  .case-tab {
    flex: 0 0 260px;
    padding: 14px 16px;
  }

  .case-tab:hover { transform: none; }

  .case-tab-arrow { display: none; }

  .case-stage { min-height: auto; }

  .case-panel { padding: 26px 22px; }

  .case-panel-grid { grid-template-columns: 1fr; }

  .experience-timeline { padding-top: 72px; }

  .timeline-meter {
    left: 0;
    right: 0;
  }

  .meter-node {
    font-size: 10px;
    letter-spacing: 0.08em;
  }
}

@media (max-width: 1180px) {
  .hero-proof-grid,
  .signal-grid,
  .fit-grid,
  .dense-grid,
  .output-grid,
  .collaboration-grid,
  .case-grid.enhanced-case-grid,
  .opportunity-grid,
  .contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .capability-grid-6 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .view-grid { grid-template-columns: 1fr; }
}

@media (max-width: 980px) {
  .desktop-nav { display: none; }
  .nav-toggle { display: inline-block; }

  .hero {
    min-height: auto;
    padding: 100px 0 64px;
  }

  .hero-grid,
  .about-layout,
  .ai-layout,
  .collaboration-map,
  .ai-visual-main {
    grid-template-columns: 1fr;
  }

  .hero-side,
  .about-side-grid,
  .ai-content { gap: 12px; }

  .hero-proof-grid,
  .signal-grid,
  .fit-grid,
  .dense-grid,
  .capability-grid-6,
  .output-grid,
  .ai-grid,
  .collaboration-grid,
  .case-grid.enhanced-case-grid,
  .opportunity-grid,
  .contact-grid,
  .experience-grid,
  .workflow-grid {
    grid-template-columns: 1fr;
  }

  #ai .section-heading {
    order: -1;
    margin-bottom: 0;
  }

  .section-heading { margin-bottom: 28px; }

  .about-layout,
  .metrics-layout,
  #fit,
  #capabilities,
  #workflow,
  #outputs,
  #ai,
  .experience-section,
  #collaboration,
  #cases,
  #viewpoints,
  #opportunities,
  #contact {
    padding: 60px 0;
  }
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .topbar-inner { padding: 0 16px; }

  .hero {
    padding: 92px 0 56px;
  }

  .hero-grid {
    gap: 28px;
  }

  .hero h1 {
    font-size: 34px;
    line-height: 1.08;
  }

  .hero-description {
    font-size: 17px;
    line-height: 1.47;
    letter-spacing: -0.374px;
  }

  .hero-nameplate { margin: 4px 0 18px; }

  .hero-nameplate-main { font-size: clamp(32px, 8vw, 48px); }

  .hero-nameplate-sub { font-size: 12px; }

  .hero-panel-main strong { font-size: 24px; }

  .hero-actions { flex-direction: column; }

  .ai-visual-window,
  .ai-visual {
    padding: 16px;
  }

  .ai-window-bar { padding: 0 0 12px; }

  .view-switch {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    width: 100%;
  }

  .view-tab {
    text-align: center;
    padding: 10px 8px;
    font-size: 13px;
  }

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

@media (max-width: 420px) {
  .hero h1 { font-size: 30px; }

  .hero-nameplate {
    width: 100%;
    padding: 0;
  }

  .hero-nameplate-main { font-size: 32px; }
  .hero-nameplate-sub { font-size: 12px; }

  .hero-panel-main strong { font-size: 22px; }
  .metric-value { font-size: 34px; }

  .fit-card h3,
  .metric-card h3,
  .capability-card h3,
  .output-card h3,
  .ai-card h3,
  .collab-card h3,
  .case-card h3,
  .opportunity-card h3,
  .workflow-card-head strong,
  .ai-visual-head strong,
  .ai-visual-list h3,
  .ai-visual-highlight strong { font-size: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }

  .reveal,
  .reveal-nameplate {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ============================================================
   升级增量：Apple Design 对齐的动效、浮标与交互控件
   ============================================================ */

/* —— Hero 右上角实时状态条 —— */
.hero-status-chip {
  position: absolute;
  top: calc(var(--nav-height) + 18px);
  right: 32px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: rgba(255, 255, 255, 0.82);
  font-size: 12px;
  letter-spacing: 0.04em;
  opacity: 0;
  transform: translateY(-6px);
  animation: chipFadeIn 0.9s var(--ease-out) 0.6s forwards;
}

.hero-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #30d158;
  box-shadow: 0 0 0 0 rgba(48, 209, 88, 0.5);
  animation: chipPulse 1.8s ease-in-out infinite;
}

.hero-status-divider {
  width: 1px;
  height: 10px;
  background: rgba(255, 255, 255, 0.14);
}

.hero-status-time {
  font-variant-numeric: tabular-nums;
  color: rgba(255, 255, 255, 0.64);
}

@keyframes chipFadeIn {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes chipPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(48, 209, 88, 0.45); }
  50% { box-shadow: 0 0 0 6px rgba(48, 209, 88, 0); }
}

/* —— Hero 底部向下滚动提示（极简隐晦款） —— */
.hero-scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  z-index: 2;
  opacity: 0;
  animation: chipFadeIn 0.9s var(--ease-out) 1s forwards;
  transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.hero-scroll-cue:hover {
  transform: translate(-50%, 3px);
}

.hero-scroll-cue-line {
  position: relative;
  width: 1px;
  height: 22px;
  background: rgba(255, 255, 255, 0.16);
  overflow: hidden;
  opacity: 0.7;
}

.hero-scroll-cue-line::after {
  content: '';
  position: absolute;
  top: -60%;
  left: 0;
  width: 100%;
  height: 60%;
  background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.65));
  animation: cueSlide 2.4s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}

.hero-scroll-cue-arrow {
  display: block;
  width: 8px;
  height: 8px;
  border-right: 1px solid rgba(255, 255, 255, 0.36);
  border-bottom: 1px solid rgba(255, 255, 255, 0.36);
  transform: rotate(45deg);
  transition: border-color 0.3s var(--ease-out);
}

.hero-scroll-cue:hover .hero-scroll-cue-line { opacity: 1; }
.hero-scroll-cue:hover .hero-scroll-cue-arrow {
  border-right-color: rgba(255, 255, 255, 0.72);
  border-bottom-color: rgba(255, 255, 255, 0.72);
}

@keyframes cueSlide {
  0% { top: -60%; opacity: 0; }
  35% { opacity: 1; }
  100% { top: 110%; opacity: 0; }
}

/* —— 按钮增强：内部箭头跟随 + shine sweep —— */
.btn {
  gap: 8px;
}

.btn-arrow {
  display: inline-flex;
  align-items: center;
  font-size: 15px;
  line-height: 1;
  transform: translateX(0);
  transition: transform 0.32s var(--ease-out);
}

.btn:hover .btn-arrow { transform: translateX(4px); }

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -120%;
  width: 55%;
  height: 100%;
  background: linear-gradient(110deg, transparent, rgba(255, 255, 255, 0.32), transparent);
  transform: skewX(-18deg);
  pointer-events: none;
  transition: left 0.6s var(--ease-out);
}

.btn:hover::before { left: 140%; }

.btn-primary::before {
  background: linear-gradient(110deg, transparent, rgba(255, 255, 255, 0.42), transparent);
}

/* —— 卡片 conic border glow（hover 时边缘呼吸光） —— */
.interactive-surface::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: conic-gradient(
    from var(--conic-angle, 0deg),
    transparent 0deg,
    rgba(41, 151, 255, 0.55) 60deg,
    transparent 120deg,
    transparent 240deg,
    rgba(0, 113, 227, 0.4) 300deg,
    transparent 360deg
  );
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
  pointer-events: none;
  z-index: 0;
}

.interactive-surface:hover::before {
  opacity: 1;
  animation: conicSpin 6s linear infinite;
}

@keyframes conicSpin {
  to { --conic-angle: 360deg; }
}

@property --conic-angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}

/* —— Metric 卡片（数字型，不做进度条以免歧义） —— */

/* —— 左侧 section dot 指示 —— */
.side-dots {
  position: fixed;
  top: 50%;
  left: 18px;
  transform: translateY(-50%);
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 16px 10px;
  border-radius: var(--radius-pill);
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
  pointer-events: none;
}

.side-dots.visible {
  opacity: 1;
  pointer-events: auto;
}

.side-dot {
  position: relative;
  width: 22px;
  height: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
}

.side-dot::after {
  content: '';
  display: block;
  width: 4px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  opacity: 0.26;
  transition: width 0.35s var(--ease-out), opacity 0.35s var(--ease-out);
}

body[data-section='hero'] .side-dots,
body[data-section='capabilities'] .side-dots,
body[data-section='experience'] .side-dots,
body[data-section='cases'] .side-dots,
body[data-section='opportunities'] .side-dots {
  color: rgba(255, 255, 255, 0.9);
}

body[data-section='signals'] .side-dots,
body[data-section='about'] .side-dots,
body[data-section='fit'] .side-dots,
body[data-section='metrics'] .side-dots,
body[data-section='workflow'] .side-dots,
body[data-section='outputs'] .side-dots,
body[data-section='ai'] .side-dots,
body[data-section='collaboration'] .side-dots,
body[data-section='viewpoints'] .side-dots,
body[data-section='contact'] .side-dots {
  color: rgba(29, 29, 31, 0.82);
}

.side-dot:hover::after {
  width: 10px;
  opacity: 0.55;
}

.side-dot.active::after {
  width: 18px;
  opacity: 1;
}

.side-dot-tip {
  position: absolute;
  left: calc(100% + 8px);
  top: 50%;
  transform: translate(-6px, -50%);
  white-space: nowrap;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  background: rgba(29, 29, 31, 0.88);
  color: #fff;
  font-size: 11px;
  letter-spacing: 0.04em;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.24s var(--ease-out), transform 0.24s var(--ease-out);
}

.side-dot:hover .side-dot-tip {
  opacity: 1;
  transform: translate(0, -50%);
}

/* —— Floating 回顶环形按钮 —— */
.fab-back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 100;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.16), 0 0 0 1px rgba(0, 0, 0, 0.04);
  opacity: 0;
  transform: translateY(10px) scale(0.92);
  pointer-events: none;
  transition: opacity 0.35s var(--ease-out), transform 0.35s var(--ease-out), background 0.3s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.fab-back-top.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.fab-back-top:hover {
  background: #ffffff;
  transform: translateY(-2px) scale(1.02);
}

.fab-ring {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.fab-ring-track,
.fab-ring-progress {
  fill: none;
  stroke-width: 2;
}

.fab-ring-track { stroke: rgba(29, 29, 31, 0.1); }

.fab-ring-progress {
  stroke: var(--accent);
  stroke-linecap: round;
  stroke-dasharray: 119.38;
  stroke-dashoffset: 119.38;
  transition: stroke-dashoffset 0.18s linear;
}

.fab-arrow {
  position: relative;
  font-size: 16px;
  line-height: 1;
  color: var(--text-primary);
  transition: transform 0.28s var(--ease-out);
}

.fab-back-top:hover .fab-arrow { transform: translateY(-2px); }

/* —— Section 编号的发光优化（已有 ::before，这里让它在 hover 时更微妙浮现） —— */
.section-heading { transition: transform 0.4s var(--ease-out); }
.section-heading:hover::before { opacity: 0.08; }

/* —— 所有内部跳转 a 在 hover 时加细腻下划线 —— */
.mini-info-card strong a,
.contact-card strong a {
  position: relative;
}

.contact-card strong a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s var(--ease-out);
}

.contact-card strong a:hover::after { transform: scaleX(1); }

/* —— 黑白 section 交界处的精致渐变发丝线 —— */
.section-light + .section-dark,
.section-soft + .section-dark,
.section-dark + .section-light,
.section-dark + .section-soft {
  position: relative;
}

.section-dark + .section-light::before,
.section-dark + .section-soft::before,
.section-light + .section-dark::before,
.section-soft + .section-dark::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(640px, 60%);
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 113, 227, 0.32), transparent);
  pointer-events: none;
}

/* —— Hero 标题细节：字形柔和光晕（鼠标经过时） —— */
.hero h1:hover {
  text-shadow: 0 0 22px rgba(41, 151, 255, 0.18);
}

/* —— 移动端适配：侧栏圆点与浮标调整 —— */
@media (max-width: 980px) {
  .side-dots { display: none; }
  .fab-back-top {
    right: 16px;
    bottom: 16px;
    width: 46px;
    height: 46px;
  }
  .hero-status-chip {
    top: calc(var(--nav-height) + 10px);
    right: 16px;
    padding: 6px 10px;
    font-size: 11px;
  }
  .hero-scroll-cue { bottom: 18px; }
  .hero-scroll-cue-line { height: 26px; }
}

/* —— Hero 标题：间歇性光扫（高级克制） —— */
.hero h1 {
  background: linear-gradient(
    100deg,
    var(--text-white) 0%,
    var(--text-white) 40%,
    rgba(255, 255, 255, 0.55) 50%,
    var(--text-white) 60%,
    var(--text-white) 100%
  );
  background-size: 260% 100%;
  background-position: 150% 0;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  animation: heroShimmer 7.2s ease-in-out 2.4s infinite;
}

@keyframes heroShimmer {
  0%, 80%, 100% { background-position: 150% 0; }
  20%, 60% { background-position: -60% 0; }
}

/* —— Case panel 切换时内部 block 依次浮现 —— */
.case-panel.active .case-block {
  opacity: 0;
  transform: translateY(8px);
  animation: caseBlockIn 0.55s var(--ease-out) forwards;
}

.case-panel.active .case-block:nth-child(1) { animation-delay: 0.08s; }
.case-panel.active .case-block:nth-child(2) { animation-delay: 0.16s; }
.case-panel.active .case-block:nth-child(3) { animation-delay: 0.24s; }
.case-panel.active .case-block:nth-child(4) { animation-delay: 0.32s; }

@keyframes caseBlockIn {
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .hero h1 { animation: none !important; background: none !important; color: var(--text-white) !important; -webkit-text-fill-color: var(--text-white) !important; }
  .case-panel.active .case-block { animation: none !important; opacity: 1 !important; transform: none !important; }
  .reveal { filter: none !important; }
  .hero-status-dot,
  .hero-scroll-cue-line::after,
  .interactive-surface::before { animation: none !important; }
  .btn::before { display: none; }
}