/* ─────────────────────────────────────────────────
   NUADU Subpage v4 — extends lp-v4.css
   Load AFTER lp-v4.css.
   ───────────────────────────────────────────────── */

:root {
  --pillar-01: #EF2A9F; /* create  */
  --pillar-02: #FF7A1A; /* assign  */
  --pillar-03: #F7B500; /* conduct */
  --pillar-04: #34D399; /* grade   */
  --pillar-05: #59ABEA; /* report  */
  --pillar-06: #8B5CF6; /* certify */
}
.v4-sub.p1 { --accent: var(--pillar-01); }
.v4-sub.p2 { --accent: var(--pillar-02); }
.v4-sub.p3 { --accent: var(--pillar-03); }
.v4-sub.p4 { --accent: var(--pillar-04); }
.v4-sub.p5 { --accent: var(--pillar-05); }
.v4-sub.p6 { --accent: var(--pillar-06); }
.v4-sub.ai { --accent: #59ABEA; }
.v4-sub.education  { --accent: #59ABEA; }
.v4-sub.enterprise { --accent: #8B5CF6; }
.v4-sub.government { --accent: #34D399; }

/* ── HERO ─────────────────────────────────────── */
.v4-subhero {
  position: relative;
  padding: 140px 0 80px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.v4-subhero::before {
  content: "";
  position: absolute; inset: 0;
  background-image: radial-gradient(circle, var(--grid) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse 100% 60% at 50% 30%, #000 30%, transparent 75%);
  pointer-events: none;
}
.v4-subhero::after {
  content: "";
  position: absolute;
  width: 700px; height: 700px;
  left: 70%; top: -250px;
  background: radial-gradient(circle, var(--accent), transparent 60%);
  opacity: 0.12;
  filter: blur(40px);
  pointer-events: none;
}
.v4-subhero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 56px;
  align-items: center;
}
.v4-subhero__crumb {
  display: flex; align-items: center; gap: 8px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--ink-mute);
  text-transform: lowercase;
  letter-spacing: 0.04em;
  margin-bottom: 28px;
}
.v4-subhero__crumb a { color: var(--ink-dim); transition: color 0.15s; }
.v4-subhero__crumb a:hover { color: var(--accent); }
.v4-subhero__crumb .sep { color: var(--ink-faint); }
.v4-subhero__crumb .cur { color: var(--ink); }

.v4-subhero__num {
  font-family: "Nexa", sans-serif;
  font-weight: 900;
  font-size: clamp(88px, 13vw, 220px);
  letter-spacing: -0.05em;
  line-height: 1;
  color: var(--accent);
  padding-top: 0.08em;
  padding-bottom: 0.06em;
  display: inline-block;
  text-shadow: 0 0 80px var(--accent);
}
.v4-subhero__name {
  font-family: "Nexa", sans-serif;
  font-weight: 900;
  font-size: clamp(44px, 5.5vw, 72px);
  letter-spacing: -0.035em;
  line-height: 0.95;
  margin-top: 4px;
  margin-bottom: 6px;
  color: var(--ink);
}
.v4-subhero__subtitle {
  font-family: "Nexa", sans-serif;
  font-style: italic;
  font-weight: 700;
  font-size: clamp(15px, 1.4vw, 18px);
  color: var(--ink-mute);
  margin-bottom: 28px;
}
.v4-subhero__headline {
  font-family: "Nexa", sans-serif;
  font-weight: 900;
  font-size: clamp(28px, 3.4vw, 44px);
  letter-spacing: -0.025em;
  line-height: 1.05;
  margin-bottom: 22px;
  color: var(--ink);
  text-wrap: balance;
}
.v4-subhero__desc {
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink-dim);
  max-width: 540px;
  margin-bottom: 28px;
}
.v4-subhero__features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 24px;
  max-width: 560px;
}
.v4-subhero__feature {
  display: flex; align-items: center; gap: 8px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  color: var(--ink-dim);
}
.v4-subhero__feature .tick {
  color: var(--accent);
  font-weight: 700;
}
.v4-subhero__outcome {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 8px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line-2);
  border-left: 2px solid var(--accent);
  font-family: "Nexa", sans-serif;
  font-style: italic;
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
}

/* Right side: terminal-style hero card */
.v4-subcard {
  position: relative;
  border-radius: 16px;
  background: linear-gradient(180deg, #0E1726 0%, #0A111E 100%);
  border: 1px solid var(--line-2);
  box-shadow:
    0 30px 80px rgba(0,0,0,0.5),
    0 0 60px rgba(89,171,234,0.05);
  overflow: hidden;
  min-height: 460px;
  display: flex; flex-direction: column;
}
.v4-subcard__chrome {
  display: flex; align-items: center;
  padding: 11px 14px;
  gap: 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
}
.v4-subcard__lights { display: flex; gap: 6px; }
.v4-subcard__lights span { width: 10px; height: 10px; border-radius: 50%; background: #3a4150; }
.v4-subcard__lights span:nth-child(1) { background: #ff5f57; }
.v4-subcard__lights span:nth-child(2) { background: #febc2e; }
.v4-subcard__lights span:nth-child(3) { background: #28c840; }
.v4-subcard__title {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px; color: var(--ink-dim);
  display: flex; align-items: center; gap: 8px;
}
.v4-subcard__title .live {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: v4-pulse 2s ease-in-out infinite;
}
.v4-subcard__body {
  flex: 1; padding: 20px;
  display: flex; flex-direction: column;
  gap: 10px;
  position: relative;
}
.v4-subcard__footrow {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--ink-mute);
}

/* ── PROBLEM ───────────────────────────────────── */
.v4-subproblem {
  padding: 120px 0;
  position: relative;
  border-bottom: 1px solid var(--line);
}
.v4-subproblem__inner {
  max-width: 980px; margin: 0 auto; padding: 0 32px;
}
.v4-subproblem h2 {
  font-family: "Nexa", sans-serif;
  font-weight: 900;
  font-size: clamp(34px, 4.4vw, 56px);
  letter-spacing: -0.035em;
  line-height: 1.05;
  margin: 18px 0 28px;
  color: var(--ink);
  text-wrap: balance;
}
.v4-subproblem p {
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink-dim);
  margin-bottom: 18px;
  max-width: 70ch;
}
.v4-subproblem__close {
  font-family: "Nexa", sans-serif;
  font-style: italic;
  font-weight: 700;
  font-size: clamp(20px, 2vw, 26px);
  color: var(--ink) !important;
  margin-top: 28px !important;
  padding-left: 20px;
  border-left: 2px solid var(--accent);
  max-width: 60ch !important;
}

/* ── HOW IT WORKS ──────────────────────────────── */
.v4-subhow {
  padding: 120px 0;
  border-bottom: 1px solid var(--line);
  background: var(--bg-deep);
}
.v4-subhow__head {
  max-width: 800px;
  margin-bottom: 56px;
}
.v4-subhow__head h2 {
  font-family: "Nexa", sans-serif;
  font-weight: 900;
  font-size: clamp(38px, 4.8vw, 60px);
  letter-spacing: -0.035em;
  line-height: 1;
  margin-top: 16px;
  color: var(--ink);
  text-wrap: balance;
}
.v4-substep {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 48px;
  padding: 40px 0;
  border-top: 1px solid var(--line);
  position: relative;
}
.v4-substep__num {
  font-family: "Nexa", sans-serif;
  font-weight: 900;
  font-size: 64px;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--accent);
  text-shadow: 0 0 40px var(--accent);
}
.v4-substep__num-lbl {
  font-family: "JetBrains Mono", monospace;
  font-size: 10.5px;
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-top: 6px;
}
.v4-substep__body h3 {
  font-family: "Nexa", sans-serif;
  font-weight: 900;
  font-size: clamp(24px, 2.6vw, 32px);
  letter-spacing: -0.025em;
  line-height: 1.05;
  color: var(--ink);
  margin-bottom: 8px;
}
.v4-substep__tag {
  font-family: "Nexa", sans-serif;
  font-style: italic;
  font-weight: 700;
  font-size: 16px;
  color: var(--ink-mute);
  margin-bottom: 16px;
}
.v4-substep__body p {
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--ink-dim);
  margin-bottom: 18px;
  max-width: 68ch;
}
.v4-substep__bullets {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  max-width: 720px;
}
.v4-substep__bullet {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 13px;
  color: var(--ink-dim);
}
.v4-substep__bullet::before {
  content: "›";
  color: var(--accent);
  font-family: "JetBrains Mono", monospace;
  font-weight: 700;
  flex-shrink: 0;
}

/* ── CAPABILITIES (grid of feature cards) ──────── */
.v4-subcaps {
  padding: 120px 0;
  border-bottom: 1px solid var(--line);
}
.v4-subcaps__head { max-width: 800px; margin-bottom: 48px; }
.v4-subcaps__head h2 {
  font-family: "Nexa", sans-serif;
  font-weight: 900;
  font-size: clamp(38px, 4.8vw, 60px);
  letter-spacing: -0.035em;
  line-height: 1;
  margin-top: 16px;
  color: var(--ink);
  text-wrap: balance;
}
.v4-subcaps__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.v4-subcap {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 26px;
  transition: border-color 0.2s, transform 0.2s;
  overflow: hidden;
}
.v4-subcap::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 100% 0%, var(--accent), transparent 50%);
  opacity: 0.06;
  pointer-events: none;
  transition: opacity 0.2s;
}
.v4-subcap:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.v4-subcap:hover::before { opacity: 0.14; }
.v4-subcap__icon {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--ink-mute);
  margin-bottom: 20px;
  display: flex; align-items: center; gap: 8px;
}
.v4-subcap__icon .glyph {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line-2);
  display: grid; place-items: center;
  font-size: 18px;
  color: var(--accent);
}
.v4-subcap h4 {
  font-family: "Nexa", sans-serif;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  color: var(--ink);
}
.v4-subcap p {
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--ink-dim);
}

/* ── CASES (window-style cards) ───────────────── */
.v4-subcases {
  padding: 120px 0;
  border-bottom: 1px solid var(--line);
  background: var(--bg-deep);
}
.v4-subcases__head { max-width: 800px; margin-bottom: 48px; }
.v4-subcases__head h2 {
  font-family: "Nexa", sans-serif;
  font-weight: 900;
  font-size: clamp(38px, 4.8vw, 60px);
  letter-spacing: -0.035em;
  line-height: 1;
  margin-top: 16px;
  margin-bottom: 16px;
  color: var(--ink);
  text-wrap: balance;
}
.v4-subcases__head p {
  font-size: 16px;
  color: var(--ink-dim);
  line-height: 1.6;
  max-width: 60ch;
}
.v4-subcases__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.v4-subcase {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
  display: flex; flex-direction: column;
}
.v4-subcase:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.v4-subcase__chrome {
  display: flex; align-items: center;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,0.015);
  gap: 12px;
}
.v4-subcase__lights { display: flex; gap: 5px; }
.v4-subcase__lights span { width: 8px; height: 8px; border-radius: 50%; background: #2c3142; }
.v4-subcase__chrome .tag {
  font-family: "JetBrains Mono", monospace;
  font-size: 10.5px;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
}
.v4-subcase__body { padding: 22px 22px 24px; }
.v4-subcase__body h3 {
  font-family: "Nexa", sans-serif;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 10px;
}
.v4-subcase__body > p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-dim);
  margin-bottom: 16px;
}
.v4-subcase__bullets {
  list-style: none;
  display: flex; flex-direction: column; gap: 6px;
}
.v4-subcase__bullets li {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px;
  background: rgba(255,255,255,0.025);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  color: var(--ink-dim);
}
.v4-subcase__bullets li::before {
  content: "✓";
  color: var(--accent);
  font-weight: 700;
}

/* ── DIFFERENTIATORS ──────────────────────────── */
.v4-subdiff {
  padding: 120px 0;
  border-bottom: 1px solid var(--line);
}
.v4-subdiff__head { max-width: 800px; margin-bottom: 48px; }
.v4-subdiff__head h2 {
  font-family: "Nexa", sans-serif;
  font-weight: 900;
  font-size: clamp(38px, 4.8vw, 60px);
  letter-spacing: -0.035em;
  line-height: 1;
  margin-top: 16px;
  color: var(--ink);
  text-wrap: balance;
}
.v4-subdiff__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.v4-subdiff__card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 14px;
  position: relative;
  transition: border-color 0.2s;
}
.v4-subdiff__card:hover { border-color: var(--accent); }
.v4-subdiff__card .n {
  font-family: "Nexa", sans-serif;
  font-weight: 900;
  font-size: 32px;
  letter-spacing: -0.03em;
  color: var(--accent);
  margin-bottom: 16px;
  display: inline-block;
}
.v4-subdiff__card h4 {
  font-family: "Nexa", sans-serif;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 8px;
}
.v4-subdiff__card p {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-dim);
}

/* ── FAQ (terminal accordion) ─────────────────── */
.v4-subfaq {
  padding: 120px 0;
  border-bottom: 1px solid var(--line);
  background: var(--bg-deep);
}
.v4-subfaq__head { text-align: center; margin-bottom: 56px; }
.v4-subfaq__head h2 {
  font-family: "Nexa", sans-serif;
  font-weight: 900;
  font-size: clamp(38px, 4.8vw, 56px);
  letter-spacing: -0.035em;
  line-height: 1;
  margin-top: 16px;
  color: var(--ink);
  text-wrap: balance;
}
.v4-subfaq__list {
  max-width: 880px; margin: 0 auto;
  display: flex; flex-direction: column;
  gap: 8px;
}
.v4-subfaq__item {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.v4-subfaq__item.open { border-color: var(--accent); }
.v4-subfaq__q {
  width: 100%;
  padding: 18px 22px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
  background: transparent;
  border: 0;
  text-align: left;
  font-family: "Nexa", sans-serif;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.01em;
  color: var(--ink);
  cursor: pointer;
}
.v4-subfaq__q .prompt {
  font-family: "JetBrains Mono", monospace;
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
}
.v4-subfaq__q .label { flex: 1; }
.v4-subfaq__chev {
  width: 28px; height: 28px;
  border-radius: 6px;
  border: 1px solid var(--line-2);
  display: grid; place-items: center;
  color: var(--ink-mute);
  flex-shrink: 0;
  transition: transform 0.2s, border-color 0.2s, color 0.2s;
}
.v4-subfaq__item.open .v4-subfaq__chev {
  transform: rotate(180deg);
  border-color: var(--accent);
  color: var(--accent);
}
.v4-subfaq__a {
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}
.v4-subfaq__a-body {
  padding: 0 22px 22px 56px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--ink-dim);
}

/* ── FINAL CTA ────────────────────────────────── */
.v4-subfinal {
  padding: 140px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.v4-subfinal::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(700px at 50% 50%, var(--accent), transparent 60%);
  opacity: 0.12;
  pointer-events: none;
}
.v4-subfinal__inner {
  position: relative;
  max-width: 900px; margin: 0 auto; padding: 0 32px;
}
.v4-subfinal__inner h2 {
  font-family: "Nexa", sans-serif;
  font-weight: 900;
  font-size: clamp(40px, 6vw, 88px);
  letter-spacing: -0.045em;
  line-height: 0.95;
  margin-bottom: 24px;
  color: var(--ink);
  text-wrap: balance;
}
.v4-subfinal__inner p {
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink-dim);
  max-width: 640px;
  margin: 0 auto 36px;
}
.v4-subfinal__ctas {
  display: flex; gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── SECTOR-ONLY: stats row ─────────────────── */
.v4-sectorstats {
  padding: 60px 0;
  border-bottom: 1px solid var(--line);
  background: var(--bg-deep);
}
.v4-sectorstats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.v4-sectorstats__card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px 20px;
  position: relative;
  overflow: hidden;
}
.v4-sectorstats__card::before {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 2px;
  background: var(--accent);
  opacity: 0.5;
}
.v4-sectorstats__v {
  font-family: "Nexa", sans-serif;
  font-weight: 900;
  font-size: 36px;
  letter-spacing: -0.03em;
  color: var(--ink);
  line-height: 1;
  margin-bottom: 6px;
}
.v4-sectorstats__l {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ── SECTOR-ONLY: audiences ─────────────────── */
.v4-sectoraud {
  padding: 120px 0;
  border-bottom: 1px solid var(--line);
}
.v4-sectoraud__head { max-width: 800px; margin-bottom: 48px; }
.v4-sectoraud__head h2 {
  font-family: "Nexa", sans-serif;
  font-weight: 900;
  font-size: clamp(38px, 4.8vw, 60px);
  letter-spacing: -0.035em;
  line-height: 1;
  margin-top: 16px;
  color: var(--ink);
}
.v4-sectoraud__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.v4-sectoraud__card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 28px;
  transition: border-color 0.2s, transform 0.2s;
}
.v4-sectoraud__card:hover { border-color: var(--accent); transform: translateY(-2px); }
.v4-sectoraud__card h4 {
  font-family: "Nexa", sans-serif;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 10px;
}
.v4-sectoraud__card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-dim);
  margin-bottom: 16px;
}
.v4-sectoraud__stat {
  display: inline-block;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line-2);
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--accent);
  font-weight: 600;
}

/* ── AI-ONLY: engine cards ─────────────────── */
.v4-aiengines { padding: 120px 0; border-bottom: 1px solid var(--line); background: var(--bg-deep); }
.v4-aiengines__head { max-width: 800px; margin-bottom: 48px; }
.v4-aiengines__head h2 {
  font-family: "Nexa", sans-serif;
  font-weight: 900;
  font-size: clamp(38px, 4.8vw, 60px);
  letter-spacing: -0.035em;
  line-height: 1;
  margin-top: 16px;
  color: var(--ink);
}
.v4-aiengines__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.v4-aiengine {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.2s;
}
.v4-aiengine:hover { border-color: var(--accent); }
.v4-aiengine__num {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}
.v4-aiengine__num .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}
.v4-aiengine h3 {
  font-family: "Nexa", sans-serif;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 14px;
}
.v4-aiengine__tags {
  display: flex; gap: 6px; flex-wrap: wrap;
  margin-bottom: 16px;
}
.v4-aiengine__tag {
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line-2);
  font-family: "JetBrains Mono", monospace;
  font-size: 10.5px;
  color: var(--ink-dim);
}
.v4-aiengine .what {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-dim);
  margin-bottom: 14px;
}
.v4-aiengine .diff {
  padding: 12px 14px;
  background: rgba(255,255,255,0.025);
  border-left: 2px solid var(--accent);
  border-radius: 6px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink);
}
.v4-aiengine .diff b {
  color: var(--accent);
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 4px;
  font-weight: 700;
}

/* ── Responsive ─────────────────────────────── */
@media (max-width: 1024px) {
  .v4-subhero__inner { grid-template-columns: 1fr; gap: 36px; }
  .v4-subhero__features { grid-template-columns: 1fr; }
  .v4-substep { grid-template-columns: 1fr; gap: 16px; }
  .v4-substep__bullets { grid-template-columns: 1fr; }
  .v4-subcaps__grid, .v4-subdiff__grid, .v4-sectoraud__grid { grid-template-columns: 1fr 1fr; }
  .v4-subcases__grid, .v4-aiengines__grid { grid-template-columns: 1fr; }
  .v4-sectorstats__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .v4-subcaps__grid, .v4-subdiff__grid, .v4-sectoraud__grid { grid-template-columns: 1fr; }
  .v4-sectorstats__grid { grid-template-columns: 1fr; }
  .v4-subfaq__a-body { padding-left: 22px; }
}

/* ── Small-mobile responsive (≤ 560px) ───────────────────── */
@media (max-width: 560px) {
  html, body { overflow-x: hidden; }
  .v4-wrap { padding-left: 18px; padding-right: 18px; }
  .v4-subhero { padding: 110px 0 56px; }
  .v4-subhero__inner { gap: 28px; }
  .v4-subhero__crumb { font-size: 10px; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
  .v4-subhero__num { font-size: clamp(56px, 18vw, 96px); }
  .v4-subhero__name {
    font-size: clamp(36px, 11vw, 56px);
    line-height: 1.0;
    overflow-wrap: break-word;
    word-break: break-word;
    hyphens: auto;
  }
  .v4-subhero__headline {
    font-size: clamp(22px, 6.5vw, 32px);
    line-height: 1.1;
    overflow-wrap: break-word;
  }
  .v4-subhero__subtitle { font-size: 14px; margin-bottom: 22px; }
  .v4-subhero__desc { font-size: 15px; max-width: none; }
  .v4-subhero__features { max-width: none; }
  .v4-subhero__outcome { font-size: 15px; }

  .v4-subproblem__inner,
  .v4-subhow__head,
  .v4-subcaps__head,
  .v4-subcases__head,
  .v4-subdiff__head { padding-left: 0; padding-right: 0; max-width: none; }

  .v4-substep { padding: 20px; gap: 12px; }
  .v4-substep__num { font-size: 36px; }

  .v4-subcaps__grid, .v4-subdiff__grid, .v4-sectoraud__grid,
  .v4-subcases__grid, .v4-aiengines__grid,
  .v4-sectorstats__grid { grid-template-columns: 1fr !important; gap: 14px; }

  .v4-subcap, .v4-subcase, .v4-subdiff__item,
  .v4-aiengine, .v4-sectoraud__item, .v4-sectorstat { padding: 20px; }

  .v4-subcard { border-radius: 14px; }
  .v4-subcard__body { padding: 18px; font-size: 13px; }
  .v4-subcard__chrome { padding: 10px 14px; }
  .v4-subcard__title { font-size: 12px; }
}