:root {
  --ai-grid-line: rgba(255, 255, 255, 0.055);
  --ai-signal: #7188ca;
  --ai-signal-bright: #8ba3e8;
}

.ai-page {
  background: var(--ink);
}

.ai-page main {
  overflow: clip;
}

.ai-page h1 em,
.ai-page h2 em,
.ai-page h3 em {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.035em;
}

.ai-page button {
  cursor: pointer;
}

/* Hero */

.ai-hero {
  position: relative;
  isolation: isolate;
  display: grid;
  min-height: 100svh;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 83% 43%, rgba(80, 107, 179, 0.2), transparent 28%),
    radial-gradient(circle at 94% 60%, rgba(95, 65, 154, 0.16), transparent 25%),
    linear-gradient(135deg, #07080d 0%, #0b0d14 52%, #090b12 100%);
}

.ai-hero::before {
  content: "";
  position: absolute;
  inset: auto -8vw -45vw auto;
  z-index: -2;
  width: min(82vw, 86rem);
  aspect-ratio: 1;
  border: 1px solid rgba(119, 139, 203, 0.15);
  border-radius: 50%;
  box-shadow:
    0 0 0 8vw rgba(80, 107, 179, 0.025),
    0 0 0 19vw rgba(95, 65, 154, 0.018);
  pointer-events: none;
}

.ai-hero-grid {
  position: absolute;
  inset: 0;
  z-index: -3;
  background-image:
    linear-gradient(var(--ai-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--ai-grid-line) 1px, transparent 1px);
  background-size: clamp(3.5rem, 5vw, 5.5rem) clamp(3.5rem, 5vw, 5.5rem);
  mask-image: linear-gradient(90deg, transparent, #000 20%, #000 100%);
  opacity: 0.72;
}

.ai-hero-glow {
  position: absolute;
  top: 22%;
  right: -8%;
  z-index: -2;
  width: min(68vw, 70rem);
  aspect-ratio: 1.2;
  background: conic-gradient(from 145deg, rgba(28, 151, 212, 0.14), rgba(80, 107, 179, 0.2), rgba(95, 65, 154, 0.16), transparent 70%);
  filter: blur(95px);
  opacity: 0.74;
  pointer-events: none;
}

.ai-hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(36rem, 1.08fr);
  gap: clamp(3rem, 7vw, 8rem);
  align-items: center;
  padding-top: clamp(9.5rem, 14vh, 12rem);
  padding-bottom: clamp(7rem, 10vh, 9rem);
}

.ai-kicker {
  display: flex;
  gap: 1.15rem;
  align-items: center;
  margin-bottom: clamp(2rem, 4vw, 3.6rem);
  color: rgba(255, 255, 255, 0.66);
}

.ai-kicker span {
  color: var(--cyan);
  font-family: var(--font-mono);
}

.ai-hero h1 {
  max-width: 10.7ch;
  font-size: clamp(4rem, 7.3vw, 8.4rem);
  font-weight: 700;
  letter-spacing: -0.07em;
  line-height: 0.86;
}

.ai-hero h1 em {
  display: block;
  margin-top: 0.08em;
  background: linear-gradient(112deg, #eef0f7 0%, #a9b7df 46%, #9c8fca 100%);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.ai-hero-lede {
  max-width: 34rem;
  margin-top: clamp(2rem, 3.4vw, 3rem);
  color: rgba(255, 255, 255, 0.7);
  font-size: clamp(1rem, 1.2vw, 1.16rem);
  line-height: 1.72;
}

.ai-button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2.25rem;
}

.ai-system {
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(8, 10, 16, 0.64);
  box-shadow: 0 3rem 7rem rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.ai-system::before {
  content: "";
  position: absolute;
  inset: -1px;
  z-index: -1;
  background: linear-gradient(115deg, rgba(28, 151, 212, 0.2), transparent 35%, transparent 65%, rgba(95, 65, 154, 0.22));
  filter: blur(24px);
  opacity: 0.65;
}

.ai-system-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.13);
  color: rgba(255, 255, 255, 0.54);
}

.ai-system-status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ai-system-status i {
  width: 0.45rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0.9rem var(--cyan);
}

.ai-system-map {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 2.3rem minmax(0, 1fr) 2.3rem minmax(0, 1fr) 2.3rem minmax(0, 1fr);
  align-items: stretch;
  min-height: 25rem;
  padding: clamp(1rem, 2vw, 1.5rem);
}

.ai-system-stage {
  position: relative;
  display: flex;
  min-width: 0;
  flex-direction: column;
  align-items: stretch;
  padding: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 1px;
  background: rgba(255, 255, 255, 0.025);
  color: var(--white);
  text-align: left;
  transition: border-color 0.3s ease, background-color 0.3s ease, transform 0.4s var(--ease-out);
}

.ai-system-stage:hover,
.ai-system-stage:focus-visible,
.ai-system-stage.is-active {
  border-color: rgba(125, 150, 219, 0.72);
  background: rgba(80, 107, 179, 0.1);
}

.ai-system-stage.is-active {
  transform: translateY(-0.35rem);
}

.ai-system-stage::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  left: -1px;
  height: 2px;
  background: var(--zu-gradient);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.4s var(--ease-out);
}

.ai-system-stage.is-active::after {
  transform: scaleX(1);
}

.ai-stage-number {
  color: rgba(255, 255, 255, 0.38);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
}

.ai-stage-label {
  margin-top: 0.4rem;
  font-size: clamp(1.05rem, 1.5vw, 1.35rem);
  font-weight: 600;
  letter-spacing: -0.035em;
}

.ai-stage-media {
  position: relative;
  display: block;
  aspect-ratio: 1.05;
  margin-top: 1.4rem;
  overflow: hidden;
  background: #11131a;
}

.ai-stage-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.45) contrast(1.08) brightness(0.75);
}

.ai-stage-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(7, 8, 13, 0.86));
}

.ai-stage-media i {
  position: absolute;
  right: 0.6rem;
  bottom: 0.55rem;
  left: 0.6rem;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  font-style: normal;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ai-stage-items {
  display: grid;
  gap: 0.4rem;
  margin-top: auto;
  padding-top: 1rem;
}

.ai-stage-items i {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: rgba(255, 255, 255, 0.5);
  font-family: var(--font-mono);
  font-size: 0.54rem;
  font-style: normal;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.ai-stage-items i::before {
  content: "";
  width: 0.3rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: currentColor;
}

.ai-system-route {
  display: grid;
  align-content: center;
  justify-items: stretch;
  overflow: hidden;
  color: rgba(255, 255, 255, 0.32);
}

.ai-system-route i {
  position: relative;
  display: block;
  height: 1px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.16);
}

.ai-system-route i::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--zu-gradient);
  transform: translateX(-100%);
  animation: ai-signal 2.1s linear infinite;
}

.ai-system-route span {
  margin-top: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.44rem;
  letter-spacing: 0.06em;
  text-align: center;
  text-transform: uppercase;
  white-space: nowrap;
}

@keyframes ai-signal {
  to { transform: translateX(100%); }
}

.ai-core-rings {
  position: relative;
  display: grid;
  aspect-ratio: 1;
  margin-top: 1.4rem;
  place-items: center;
}

.ai-core-rings i {
  position: absolute;
  border: 1px solid rgba(115, 139, 204, 0.26);
  border-radius: 50%;
}

.ai-core-rings i:nth-child(1) { inset: 6%; }
.ai-core-rings i:nth-child(2) { inset: 21%; border-color: rgba(28, 151, 212, 0.38); }
.ai-core-rings i:nth-child(3) { inset: 35%; border-color: rgba(95, 65, 154, 0.55); }

.ai-core-rings b {
  position: relative;
  z-index: 1;
  display: grid;
  width: 28%;
  aspect-ratio: 1;
  place-items: center;
  background: var(--zu-gradient);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
}

.ai-output-grid {
  display: grid;
  flex: 1;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.35rem;
  align-content: center;
  margin-top: 1.4rem;
}

.ai-output-grid i {
  display: grid;
  min-height: 3.4rem;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.64);
  font-family: var(--font-mono);
  font-size: 0.5rem;
  font-style: normal;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.ai-learn-signals {
  position: relative;
  display: grid;
  flex: 1;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.3rem;
  align-items: end;
  min-height: 8rem;
  margin-top: 1.4rem;
  padding: 1rem 0.45rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.ai-learn-signals i {
  display: block;
  background: linear-gradient(180deg, var(--cyan), var(--violet));
  opacity: 0.66;
}

.ai-learn-signals i:nth-child(1) { height: 34%; }
.ai-learn-signals i:nth-child(2) { height: 57%; }
.ai-learn-signals i:nth-child(3) { height: 46%; }
.ai-learn-signals i:nth-child(4) { height: 78%; }

.ai-learn-signals b {
  position: absolute;
  right: 0;
  bottom: 0.3rem;
  color: rgba(255, 255, 255, 0.48);
  font-family: var(--font-mono);
  font-size: 0.48rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.ai-system-readout {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 2rem;
  min-height: 7rem;
  align-items: start;
  padding: 1.15rem 1.3rem 1.35rem;
  border-top: 1px solid rgba(255, 255, 255, 0.13);
}

.ai-system-readout .micro {
  color: #9eb1e4;
}

.ai-system-readout p {
  color: rgba(255, 255, 255, 0.64);
  font-size: 0.78rem;
  line-height: 1.6;
}

.ai-scroll-cue {
  position: absolute;
  right: var(--gutter);
  bottom: 2.1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: rgba(255, 255, 255, 0.54);
  font-family: var(--font-mono);
  font-size: 0.59rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ai-scroll-cue i {
  position: relative;
  width: 2.5rem;
  height: 1px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.28);
}

.ai-scroll-cue i::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--cyan);
  animation: ai-signal 2s linear infinite;
}

/* Light problem */

.ai-problem {
  padding-block: var(--section-space);
  background:
    radial-gradient(circle at 85% 12%, rgba(80, 107, 179, 0.12), transparent 26%),
    var(--paper);
  color: var(--ink);
}

.ai-problem .section-index,
.ai-why .section-index {
  margin-bottom: clamp(4rem, 8vw, 8rem);
}

.ai-problem-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(20rem, 0.7fr);
  gap: clamp(4rem, 9vw, 10rem);
  align-items: start;
}

.ai-problem h2,
.ai-why h2 {
  max-width: 11.8ch;
  font-size: clamp(3.2rem, 6.7vw, 7.2rem);
  font-weight: 400;
  letter-spacing: -0.062em;
  line-height: 0.92;
}

.ai-problem h2 em,
.ai-audit h2 em,
.ai-why h2 em,
.ai-outcome h2 em {
  background: var(--zu-gradient-deep);
  background-clip: text;
  -webkit-background-clip: text;
  color: var(--brand-deep);
  -webkit-text-fill-color: transparent;
}

.ai-problem-copy {
  padding-top: 0.4rem;
}

.ai-problem-copy > p {
  max-width: 38rem;
  color: var(--muted-dark);
  font-size: clamp(1rem, 1.35vw, 1.16rem);
  line-height: 1.76;
}

.ai-connection {
  margin-top: clamp(3rem, 6vw, 5.5rem);
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.ai-connection-before {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.4rem;
  padding-block: 1rem;
}

.ai-connection-before span,
.ai-connection-after span,
.ai-connection-after strong {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.ai-connection-before span {
  padding: 0.6rem 0.4rem;
  border: 1px solid rgba(7, 8, 13, 0.16);
  color: rgba(7, 8, 13, 0.48);
  text-align: center;
}

.ai-connection-line {
  position: relative;
  height: 4.5rem;
}

.ai-connection-line::before,
.ai-connection-line::after,
.ai-connection-line i {
  content: "";
  position: absolute;
}

.ai-connection-line::before {
  top: 0;
  left: 12.5%;
  width: 75%;
  height: 50%;
  border-right: 1px solid rgba(7, 8, 13, 0.24);
  border-bottom: 1px solid rgba(7, 8, 13, 0.24);
  border-left: 1px solid rgba(7, 8, 13, 0.24);
}

.ai-connection-line::after {
  bottom: 0;
  left: 50%;
  width: 1px;
  height: 50%;
  background: var(--brand);
}

.ai-connection-line i {
  bottom: -0.2rem;
  left: calc(50% - 0.2rem);
  width: 0.4rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 1rem rgba(80, 107, 179, 0.7);
}

.ai-connection-after {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.ai-connection-after span { color: var(--muted-dark); }
.ai-connection-after strong { color: var(--brand-deep); }

/* Services */

.ai-services {
  padding-block: var(--section-space);
  background:
    radial-gradient(circle at 75% 45%, rgba(80, 107, 179, 0.13), transparent 31%),
    linear-gradient(180deg, #090b11 0%, #07080d 100%);
  color: var(--white);
}

.ai-services .section-index {
  margin-bottom: clamp(3.5rem, 7vw, 7rem);
}

.ai-services-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(19rem, 0.8fr);
  gap: clamp(3rem, 8vw, 9rem);
  align-items: end;
}

.ai-services-intro h2 {
  max-width: 11ch;
  font-size: clamp(3rem, 6.3vw, 6.8rem);
  font-weight: 400;
  letter-spacing: -0.061em;
  line-height: 0.92;
}

.ai-services-intro h2 em,
.ai-workflow h2 em,
.ai-cta h2 em {
  color: #b5c0df;
}

.ai-services-intro > p {
  max-width: 35rem;
  color: rgba(255, 255, 255, 0.63);
  line-height: 1.72;
}

.ai-services-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(26rem, 0.92fr);
  gap: clamp(3rem, 7vw, 8rem);
  align-items: start;
  margin-top: clamp(4rem, 8vw, 8rem);
}

.ai-service-list {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.ai-service-button {
  position: relative;
  display: grid;
  width: 100%;
  grid-template-columns: 3.6rem minmax(0, 1fr) auto;
  gap: 1.2rem;
  align-items: center;
  min-height: 6.2rem;
  padding: 1.2rem 0;
  border: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  background: transparent;
  color: var(--white);
  text-align: left;
}

.ai-service-button::before {
  content: "";
  position: absolute;
  top: -1px;
  bottom: -1px;
  left: 0;
  width: 3px;
  background: var(--zu-gradient);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.4s var(--ease-out);
}

.ai-service-button > span {
  color: rgba(255, 255, 255, 0.36);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
}

.ai-service-button strong {
  font-size: clamp(1.05rem, 1.65vw, 1.45rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.ai-service-button > i {
  font-size: 1.1rem;
  font-style: normal;
  opacity: 0.32;
  transform: rotate(0);
  transition: opacity 0.25s ease, transform 0.4s var(--ease-out);
}

.ai-service-button:hover,
.ai-service-button:focus-visible,
.ai-service-button.is-active {
  padding-left: 1.2rem;
  background: linear-gradient(90deg, rgba(80, 107, 179, 0.12), transparent 70%);
}

.ai-service-button.is-active::before { transform: scaleY(1); }
.ai-service-button.is-active > i { opacity: 1; transform: rotate(45deg); }

.ai-service-stage {
  position: sticky;
  top: 8.5rem;
  min-height: 36rem;
  border-top: 1px solid rgba(255, 255, 255, 0.23);
  border-bottom: 1px solid rgba(255, 255, 255, 0.23);
}

.ai-service-stage::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 42%;
  height: 1px;
  background: var(--zu-gradient);
}

.ai-service-panel {
  min-height: 36rem;
  padding: clamp(2rem, 4vw, 3.5rem) 0;
}

.ai-service-panel[hidden] { display: none; }

.ai-service-panel .micro {
  color: #9eb1e4;
}

.ai-service-panel h3 {
  max-width: 12ch;
  margin-top: 1.3rem;
  font-size: clamp(2.3rem, 4vw, 4.5rem);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 0.95;
}

.ai-service-panel > p:not(.micro) {
  max-width: 39rem;
  margin-top: 2rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.72;
}

.ai-service-panel ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem 1.4rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.ai-service-panel li {
  position: relative;
  padding-left: 1rem;
  color: rgba(255, 255, 255, 0.54);
  font-size: 0.78rem;
  line-height: 1.5;
}

.ai-service-panel li::before {
  content: "";
  position: absolute;
  top: 0.58em;
  left: 0;
  width: 0.3rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--cyan);
}

.ai-panel-visual {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  min-height: 9rem;
  margin-top: clamp(3rem, 6vw, 5rem);
  padding: 1.4rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 2rem 2rem;
}

.ai-panel-visual span,
.ai-panel-visual strong {
  padding: 0.65rem 0.8rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: #0b0d14;
  font-family: var(--font-mono);
  font-size: 0.57rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.ai-panel-visual strong {
  border-color: rgba(112, 136, 202, 0.6);
  color: #b5c5ee;
}

.ai-panel-visual > i {
  position: relative;
  flex: 1;
  height: 1px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.16);
}

.ai-panel-visual > i::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--zu-gradient);
  animation: ai-signal 2.4s linear infinite;
}

.ai-panel-pages,
.ai-panel-voice {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.ai-panel-pages strong,
.ai-panel-voice strong {
  grid-column: 1 / -1;
  text-align: center;
}

.ai-panel-images {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.65rem;
  height: 11rem;
  margin-top: clamp(3rem, 6vw, 5rem);
  overflow: hidden;
}

.ai-panel-images img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.76) contrast(1.08);
}

/* Audit band */

.ai-audit {
  padding-block: clamp(6rem, 10vw, 9rem);
  background:
    linear-gradient(115deg, rgba(28, 151, 212, 0.08), transparent 38%),
    var(--paper-2);
  color: var(--ink);
}

.ai-audit-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(20rem, 0.8fr);
  gap: clamp(4rem, 9vw, 10rem);
}

.ai-audit .micro {
  margin-bottom: 2rem;
  color: var(--brand-deep);
}

.ai-audit h2 {
  max-width: 10ch;
  font-size: clamp(3.2rem, 6vw, 6.5rem);
  font-weight: 400;
  letter-spacing: -0.06em;
  line-height: 0.91;
}

.ai-audit-copy > p:first-child {
  color: var(--muted-dark);
  line-height: 1.78;
}

.ai-audit-note {
  margin-top: 2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line-dark);
  color: var(--brand-deep);
  font-family: var(--font-mono);
  font-size: 0.69rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1.55;
  text-transform: uppercase;
}

.ai-audit .button {
  margin-top: 2.4rem;
}

/* Workflow */

.ai-workflow {
  padding-block: var(--section-space);
  background:
    radial-gradient(circle at 18% 25%, rgba(28, 151, 212, 0.09), transparent 25%),
    linear-gradient(180deg, #080a10, #0c0e15);
  color: var(--white);
}

.ai-workflow .section-index {
  margin-bottom: clamp(4rem, 8vw, 8rem);
}

.ai-workflow-layout {
  display: grid;
  grid-template-columns: minmax(22rem, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(4rem, 9vw, 10rem);
  align-items: start;
}

.ai-workflow-heading {
  position: sticky;
  top: 9.5rem;
}

.ai-workflow h2 {
  max-width: 10ch;
  font-size: clamp(3.2rem, 5.8vw, 6.2rem);
  font-weight: 400;
  letter-spacing: -0.06em;
  line-height: 0.91;
}

.ai-workflow-meter {
  height: 2px;
  margin-top: 3rem;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.14);
}

.ai-workflow-meter i {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--zu-gradient);
  transform: scaleX(0.25);
  transform-origin: left center;
  transition: transform 0.65s var(--ease-out);
}

.ai-workflow-heading > p {
  margin-top: 0.8rem;
  color: rgba(255, 255, 255, 0.48);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}

.ai-workflow-step {
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  min-height: 55svh;
  align-content: center;
  padding-block: 4rem;
  border-top: 1px solid rgba(255, 255, 255, 0.19);
  opacity: 0.42;
  transition: opacity 0.45s ease;
}

.ai-workflow-step:last-child {
  border-bottom: 1px solid rgba(255, 255, 255, 0.19);
}

.ai-workflow-step.is-active,
.ai-workflow-step:focus-visible {
  opacity: 1;
}

.ai-workflow-step > span {
  padding-top: 0.3rem;
  color: #9eb1e4;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
}

.ai-workflow-step .micro {
  margin-bottom: 1.25rem;
  color: rgba(255, 255, 255, 0.48);
}

.ai-workflow-step h3 {
  max-width: 14ch;
  font-size: clamp(2.2rem, 4.4vw, 4.9rem);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 0.95;
}

.ai-workflow-step div > p:last-child {
  max-width: 35rem;
  margin-top: 1.6rem;
  color: rgba(255, 255, 255, 0.62);
  line-height: 1.72;
}

/* Why and outcome */

.ai-why {
  padding-block: var(--section-space);
  background:
    radial-gradient(circle at 88% 90%, rgba(95, 65, 154, 0.1), transparent 26%),
    var(--paper);
  color: var(--ink);
}

.ai-why-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(22rem, 0.88fr);
  gap: clamp(4rem, 9vw, 10rem);
  align-items: start;
}

.ai-why-pair {
  border-top: 1px solid var(--line-dark);
}

.ai-why-pair article {
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  gap: 2rem;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--line-dark);
}

.ai-why-pair span {
  color: var(--brand-deep);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.ai-why-pair p {
  color: var(--muted-dark);
  line-height: 1.7;
}

.ai-why-resolution {
  position: relative;
  margin-top: 3.2rem;
  padding: 2rem 0 0 2rem;
  border-top: 2px solid transparent;
  border-image: var(--zu-gradient-deep) 1;
  color: var(--brand-deep);
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.8rem);
  font-style: italic;
  line-height: 1.1;
}

.ai-why-resolution::before {
  content: "+";
  position: absolute;
  top: 1.85rem;
  left: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-style: normal;
}

.ai-outcome {
  display: grid;
  grid-template-columns: 0.45fr 1.25fr 0.7fr;
  gap: clamp(2rem, 6vw, 6rem);
  align-items: end;
  margin-top: clamp(6rem, 12vw, 12rem);
  padding-top: clamp(3rem, 6vw, 5rem);
  border-top: 1px solid var(--line-dark);
}

.ai-outcome > .micro {
  color: var(--brand-deep);
}

.ai-outcome h2 {
  max-width: 12ch;
  font-size: clamp(2.8rem, 5.7vw, 6.2rem);
  font-weight: 400;
  letter-spacing: -0.06em;
  line-height: 0.93;
}

.ai-outcome > p:last-child {
  color: var(--muted-dark);
  line-height: 1.72;
}

/* CTA */

.ai-cta {
  position: relative;
  isolation: isolate;
  display: grid;
  min-height: 80svh;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 12% 20%, rgba(28, 151, 212, 0.14), transparent 30%),
    radial-gradient(circle at 88% 80%, rgba(95, 65, 154, 0.2), transparent 35%),
    linear-gradient(180deg, #08090e 0%, #0c0e15 100%);
}

.ai-cta::before {
  content: "";
  position: absolute;
  right: -15vw;
  bottom: -40vw;
  z-index: -1;
  width: min(80vw, 80rem);
  aspect-ratio: 1;
  border: 1px solid rgba(123, 143, 205, 0.15);
  border-radius: 50%;
  box-shadow: 0 0 0 10vw rgba(80, 107, 179, 0.025), 0 0 0 22vw rgba(95, 65, 154, 0.02);
}

.ai-cta-inner {
  padding-block: clamp(6rem, 10vw, 9rem);
}

.ai-cta .micro {
  margin-bottom: 2.2rem;
  color: rgba(255, 255, 255, 0.55);
}

.ai-cta h2 {
  max-width: 10ch;
  font-size: clamp(4rem, 8.3vw, 9rem);
  font-weight: 400;
  letter-spacing: -0.067em;
  line-height: 0.87;
}

.ai-cta-bottom {
  display: grid;
  grid-template-columns: minmax(16rem, 1fr) auto;
  gap: 3rem;
  align-items: end;
  max-width: 60rem;
  margin-top: clamp(3rem, 5vw, 5rem);
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.42);
}

.ai-cta-bottom p {
  max-width: 38rem;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.7;
}

/* Responsive */

@media (max-width: 1240px) {
  .ai-hero-layout {
    grid-template-columns: minmax(0, 0.85fr) minmax(33rem, 1.15fr);
    gap: 3rem;
  }

  .ai-system-map {
    grid-template-columns: minmax(0, 1fr) 1.4rem minmax(0, 1fr) 1.4rem minmax(0, 1fr) 1.4rem minmax(0, 1fr);
  }
}

@media (max-width: 1080px) {
  .ai-hero {
    min-height: auto;
  }

  .ai-hero-layout {
    grid-template-columns: 1fr;
    padding-top: 10rem;
    padding-bottom: 7rem;
  }

  .ai-hero h1 {
    max-width: 11ch;
    font-size: clamp(4.2rem, 11vw, 7.5rem);
  }

  .ai-system {
    width: min(100%, 58rem);
    margin: 1rem auto 0;
  }

  .ai-scroll-cue { display: none; }

  .ai-services-layout {
    grid-template-columns: minmax(0, 1fr) minmax(22rem, 0.8fr);
    gap: 3rem;
  }

  .ai-service-button {
    grid-template-columns: 2.7rem minmax(0, 1fr) auto;
  }
}

@media (max-width: 900px) {
  .ai-page .button {
    min-height: 3rem;
  }

  .ai-problem-grid,
  .ai-services-intro,
  .ai-audit-grid,
  .ai-why-grid,
  .ai-outcome {
    grid-template-columns: 1fr;
  }

  .ai-problem h2,
  .ai-why h2 {
    max-width: 12ch;
  }

  .ai-problem-copy,
  .ai-services-intro > p,
  .ai-audit-copy,
  .ai-why-body,
  .ai-outcome > p:last-child {
    max-width: 42rem;
  }

  .ai-services-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .ai-service-stage {
    position: relative;
    top: auto;
    min-height: auto;
  }

  .js .ai-service-stage {
    display: none;
  }

  .ai-service-button {
    min-height: 5.5rem;
  }

  .ai-service-button.is-active > i {
    transform: rotate(135deg);
  }

  .ai-service-list .ai-service-panel {
    min-height: 0;
    padding: clamp(1.5rem, 5vw, 2.5rem) clamp(1rem, 4vw, 2rem) clamp(2.4rem, 7vw, 3.5rem);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    background: linear-gradient(135deg, rgba(80, 107, 179, 0.12), rgba(255, 255, 255, 0.018) 55%, rgba(95, 65, 154, 0.08));
    scroll-margin-top: 6.5rem;
    animation: ai-service-panel-in 0.4s var(--ease-out) both;
  }

  .ai-service-list .ai-service-panel h3 {
    font-size: clamp(2.2rem, 8vw, 3.8rem);
  }

  .ai-service-list .ai-service-panel > p:not(.micro) {
    margin-top: 1.35rem;
  }

  .ai-service-list .ai-panel-visual,
  .ai-service-list .ai-panel-images {
    margin-top: 2rem;
  }

  .ai-workflow-layout {
    grid-template-columns: 1fr;
    gap: 4rem;
  }

  .ai-workflow-heading {
    position: relative;
    top: auto;
  }

  .ai-workflow h2 {
    max-width: 12ch;
  }

  .ai-workflow-step {
    min-height: auto;
    opacity: 1;
  }

  .ai-outcome {
    align-items: start;
    gap: 2rem;
  }
}

@keyframes ai-service-panel-in {
  from {
    opacity: 0;
    transform: translateY(-0.5rem);
  }

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

@media (max-width: 700px) {
  .ai-hero-layout {
    padding-top: 8.5rem;
    padding-bottom: 5rem;
  }

  .ai-hero h1 {
    font-size: clamp(3.5rem, 16vw, 5.6rem);
    line-height: 0.88;
  }

  .ai-kicker {
    margin-bottom: 2rem;
  }

  .ai-button-row {
    display: grid;
  }

  .ai-button-row .button {
    width: 100%;
  }

  .ai-system-header {
    padding: 0.85rem;
  }

  .ai-system-map {
    grid-template-columns: 1fr;
    gap: 0;
    min-height: 0;
    padding: 0.85rem;
  }

  .ai-system-stage {
    min-height: 11rem;
  }

  .ai-system-stage.is-active {
    transform: translateX(0.25rem);
  }

  .ai-stage-media,
  .ai-core-rings,
  .ai-output-grid,
  .ai-learn-signals {
    display: none;
  }

  .ai-system-route {
    width: 1px;
    height: 2.2rem;
    margin-left: 2rem;
    background: rgba(255, 255, 255, 0.18);
  }

  .ai-system-route i,
  .ai-system-route span {
    display: none;
  }

  .ai-system-readout {
    grid-template-columns: 1fr;
    gap: 0.8rem;
    min-height: 9.5rem;
  }

  .ai-problem .section-index,
  .ai-why .section-index,
  .ai-services .section-index,
  .ai-workflow .section-index {
    margin-bottom: 3.5rem;
  }

  .ai-problem-grid,
  .ai-audit-grid,
  .ai-why-grid {
    gap: 3rem;
  }

  .ai-problem h2,
  .ai-services-intro h2,
  .ai-audit h2,
  .ai-workflow h2,
  .ai-why h2,
  .ai-outcome h2,
  .ai-cta h2 {
    font-size: clamp(3rem, 14vw, 5rem);
  }

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

  .ai-service-button {
    grid-template-columns: 2.2rem minmax(0, 1fr) auto;
    min-height: 5rem;
    gap: 0.7rem;
  }

  .ai-service-button strong {
    font-size: 1rem;
  }

  .ai-service-button:hover,
  .ai-service-button:focus-visible,
  .ai-service-button.is-active {
    padding-left: 0.75rem;
  }

  .ai-service-panel {
    min-height: 27rem;
  }

  .ai-service-panel ul,
  .ai-panel-pages,
  .ai-panel-voice {
    grid-template-columns: 1fr;
  }

  .ai-panel-pages strong,
  .ai-panel-voice strong {
    grid-column: auto;
  }

  .ai-panel-visual {
    min-height: 12rem;
    flex-wrap: wrap;
  }

  .ai-panel-visual > i {
    min-width: 1rem;
  }

  .ai-workflow-step {
    grid-template-columns: 2.5rem minmax(0, 1fr);
    gap: 1rem;
  }

  .ai-workflow-step h3 {
    font-size: clamp(2.3rem, 11vw, 4rem);
  }

  .ai-why-pair article {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }

  .ai-why-resolution {
    padding-left: 1.6rem;
  }

  .ai-outcome {
    margin-top: 6rem;
  }

  .ai-cta-bottom {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .ai-cta-bottom .button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ai-system-route i::after,
  .ai-scroll-cue i::after,
  .ai-panel-visual > i::after {
    animation: none;
    transform: none;
  }

  .ai-system-stage,
  .ai-service-button,
  .ai-workflow-meter i {
    transition: none;
  }

  .ai-service-list .ai-service-panel {
    animation: none;
  }
}