/* AI Lab - Standalone Styles */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 62.5%;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.6rem;
  line-height: 1.5;
  background: #050505;
  color: #ffffff;
}

img {
  max-width: 100%;
  height: auto;
}

.ai-lab-shell {
  --ai-bg: #050505;
  --ai-panel: #101010;
  --ai-panel-soft: #171717;
  --ai-border: rgba(255, 255, 255, 0.14);
  --ai-text: #ffffff;
  --ai-muted: rgba(255, 255, 255, 0.68);
  --ai-soft: rgba(255, 255, 255, 0.5);
  --ai-pink: #990002;
  --ai-pink-dark: #730001;
  --ai-cyan: #7ee7dc;
  --ai-warm: #f1c7a7;
  background: var(--ai-bg);
  color: var(--ai-text);
  overflow: hidden;
  position: relative;
  z-index: 0;
  isolation: isolate;
}

.ai-lab-shell--floating-active,
.ai-lab-shell--overlay-active {
  overflow: visible;
}

.ai-lab-shell--floating-active {
  z-index: 160;
}

.ai-lab-shell--overlay-active {
  z-index: 1200;
}

.ai-lab-shell * {
  box-sizing: border-box;
}

.ai-lab-container {
  width: min(100%, 1440px);
  margin: 0 auto;
  padding: 0 4.8rem;
}

.ai-lab-section {
  padding: 7.2rem 0;
}

.ai-lab-section + .ai-lab-section {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.ai-lab-eyebrow {
  margin: 0 0 1.2rem;
  color: var(--ai-pink);
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.ai-lab-title {
  margin: 0;
  color: var(--ai-text);
  font-size: 5.6rem;
  font-weight: 850;
  line-height: 1.02;
}

.ai-lab-subtitle,
.ai-lab-copy {
  color: var(--ai-muted);
  font-size: 1.6rem;
  line-height: 1.7;
}

.ai-lab-copy p,
.ai-lab-subtitle p {
  margin: 0;
}

.ai-lab-showcase {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(42rem, 1.18fr) minmax(0, 0.9fr);
  gap: 4rem;
  align-items: center;
}

.ai-lab-intro-panel,
.ai-lab-profile,
.ai-lab-quiz-card,
.ai-lab-feature-card {
  border: 1px solid var(--ai-border);
  border-radius: 1.2rem;
  background:
    linear-gradient(145deg, rgba(153, 0, 2, 0.09), rgba(255, 255, 255, 0.03)),
    var(--ai-panel);
  box-shadow: 0 2.4rem 7rem rgba(0, 0, 0, 0.3);
}

.ai-lab-intro-panel {
  padding: 3rem;
}

.ai-lab-intro-panel h2,
.ai-lab-profile h3 {
  margin: 0 0 1.2rem;
  color: var(--ai-text);
  font-size: 2.8rem;
  font-weight: 820;
  line-height: 1.12;
}

.ai-lab-function-list {
  display: grid;
  gap: 1.2rem;
  margin: 2.4rem 0 0;
  padding: 0;
  list-style: none;
}

.ai-lab-function-list li {
  display: grid;
  grid-template-columns: 2.8rem minmax(0, 1fr);
  gap: 1.1rem;
  align-items: center;
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.45rem;
  line-height: 1.35;
}

.ai-lab-function-list span:first-child {
  display: grid;
  place-items: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 999px;
  background: rgba(153, 0, 2, 0.15);
  color: var(--ai-pink);
  font-size: 1.25rem;
  font-weight: 800;
}

.ai-lab-carousel {
  position: relative;
  min-height: 64.2rem;
  padding-bottom: 5.2rem;
  display: grid;
  place-items: center;
  overflow: visible;
}

.ai-lab-character-stage {
  position: relative;
  width: 100%;
  min-height: 59rem;
  overflow: hidden;
  cursor: grab;
  touch-action: pan-y;
  user-select: none;
  --ai-drag-x: 0px;
}

.ai-lab-character-stage.is-dragging {
  cursor: grabbing;
}

.ai-lab-character-stage.is-dragging .ai-lab-character-card {
  transition: none;
}

.ai-lab-character-card {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(72%, 34rem);
  border: 1px solid rgba(153, 0, 2, 0.8);
  border-radius: 1.6rem;
  overflow: hidden;
  background: transparent;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -50%) scale(0.76);
  transition: transform 360ms ease, opacity 260ms ease, filter 260ms ease;
}

.ai-lab-character-card.is-active {
  z-index: 3;
  opacity: 1;
  pointer-events: auto;
  transform: translate(calc(-50% + var(--ai-drag-x, 0px)), -50%) scale(1);
  box-shadow: 0 0 0 1px rgba(153, 0, 2, 0.18);
}

.ai-lab-character-card.is-prev {
  z-index: 2;
  opacity: 0.58;
  transform: translate(calc(-104% + var(--ai-drag-x, 0px)), -50%) scale(0.82);
  filter: saturate(0.8) brightness(0.76);
  pointer-events: auto;
}

.ai-lab-character-card.is-next {
  z-index: 2;
  opacity: 0.58;
  transform: translate(calc(4% + var(--ai-drag-x, 0px)), -50%) scale(0.82);
  filter: saturate(0.8) brightness(0.76);
  pointer-events: auto;
}

.ai-lab-character-card img,
.ai-lab-character-fallback {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4.2;
  object-fit: cover;
  user-select: none;
  -webkit-user-drag: none;
  background:
    radial-gradient(circle at 50% 20%, rgba(153, 0, 2, 0.34), transparent 32%),
    linear-gradient(145deg, #24121b, #090909);
}

.ai-lab-character-card img {
  height: auto;
  max-height: 58rem;
  aspect-ratio: auto;
  object-fit: contain;
  object-position: center center;
  background: transparent;
}

@media screen and (min-width: 750px) {
  .ai-lab-character-card img {
    transform: scaleX(1.035);
    transform-origin: center center;
  }
}

.ai-lab-character-fallback {
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.3rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.ai-lab-character-card__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 4.8rem 1.8rem 1.8rem;
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.88));
  pointer-events: none;
}

.ai-lab-character-card__caption strong {
  display: block;
  color: #ffffff;
  font-size: 2.2rem;
  line-height: 1.1;
}

.ai-lab-character-card__caption span {
  display: block;
  margin-top: 0.5rem;
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.35rem;
}

.ai-lab-carousel-controls {
  position: absolute;
  left: 50%;
  bottom: -0.2rem;
  z-index: 5;
  display: flex;
  gap: 1rem;
  transform: translateX(-50%);
}

.ai-lab-icon-button {
  display: grid;
  place-items: center;
  width: 4.4rem;
  height: 4.4rem;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.ai-lab-icon-button:hover {
  border-color: var(--ai-pink);
  background: var(--ai-pink);
  transform: translateY(-1px);
}

.ai-lab-profile {
  padding: 3rem;
  min-height: 40rem;
}

.ai-lab-profile-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 1.8rem 0;
}

.ai-lab-pill {
  display: inline-flex;
  align-items: center;
  min-height: 2.8rem;
  padding: 0.45rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.78);
  background: rgba(255, 255, 255, 0.06);
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1;
}

.ai-lab-profile-copy {
  color: var(--ai-muted);
  font-size: 1.5rem;
  line-height: 1.7;
}

.ai-lab-profile-copy p {
  margin: 0;
}

.ai-lab-quiz-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 4rem;
  align-items: start;
}

.ai-lab-quiz-card {
  padding: 3rem;
  overflow: hidden;
}

.ai-lab-quiz-progress {
  margin: 0 0 1.8rem;
  color: var(--ai-pink);
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.ai-lab-question {
  display: none;
  margin: 0;
  padding: 0;
  border: 0;
}

.ai-lab-question:first-of-type,
.ai-lab-question.is-active {
  display: block;
}

.ai-lab-quiz-card.is-ready .ai-lab-question {
  display: none;
}

.ai-lab-quiz-card.is-ready .ai-lab-question.is-active {
  display: block;
  animation: aiLabQuestionIn 280ms ease both;
}

@keyframes aiLabQuestionIn {
  from {
    opacity: 0;
    transform: translateX(2.4rem);
  }

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

.ai-lab-question legend {
  margin-bottom: 1.2rem;
  color: #ffffff;
  font-size: 1.8rem;
  font-weight: 800;
  line-height: 1.3;
}

.ai-lab-options {
  display: grid;
  gap: 1rem;
}

.ai-lab-option {
  position: relative;
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 1rem;
  align-items: center;
  min-height: 5.2rem;
  padding: 1.2rem 1.4rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.045);
  color: rgba(255, 255, 255, 0.8);
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, color 160ms ease;
}

.ai-lab-option:hover,
.ai-lab-option:has(input:checked) {
  border-color: rgba(153, 0, 2, 0.72);
  background: rgba(153, 0, 2, 0.14);
  color: #ffffff;
}

.ai-lab-option input {
  width: 1.8rem;
  height: 1.8rem;
  accent-color: var(--ai-pink);
  margin: 0;
}

.ai-lab-option span {
  font-size: 1.45rem;
  line-height: 1.35;
}

.ai-lab-preview {
  position: sticky;
  top: 9rem;
  min-height: 44rem;
  padding: 3rem;
  border: 1px solid var(--ai-border);
  border-radius: 1.2rem;
  background:
    radial-gradient(circle at 50% 0%, rgba(153, 0, 2, 0.18), transparent 38%),
    var(--ai-panel);
}

.ai-lab-preview-placeholder {
  display: grid;
  place-items: center;
  min-height: 28rem;
  border: 1px dashed rgba(255, 255, 255, 0.18);
  border-radius: 1rem;
  color: rgba(255, 255, 255, 0.52);
  text-align: center;
  font-size: 1.5rem;
  line-height: 1.5;
}

.ai-lab-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 4.8rem;
  padding: 0.9rem 2.4rem;
  border: 1px solid var(--ai-pink);
  border-radius: 999px;
  background: var(--ai-pink);
  color: #ffffff;
  font-size: 1.45rem;
  font-weight: 850;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease, opacity 160ms ease;
}

.ai-lab-button:hover {
  border-color: var(--ai-pink-dark);
  background: var(--ai-pink-dark);
}

.ai-lab-button--secondary {
  border-color: rgba(255, 255, 255, 0.28);
  background: transparent;
  color: #ffffff;
}

.ai-lab-button--secondary:hover {
  border-color: rgba(255, 255, 255, 0.58);
  background: rgba(255, 255, 255, 0.1);
}

.ai-lab-button[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
}

.ai-lab-quiz-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  align-items: center;
  margin-top: 2.4rem;
}

.ai-lab-quiz-alert {
  color: var(--ai-warm);
  font-size: 1.3rem;
  line-height: 1.4;
}

.ai-lab-features-head {
  max-width: 78rem;
  margin: 0 auto 4rem;
  text-align: center;
}

.ai-lab-features-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
}

.ai-lab-feature-card {
  overflow: hidden;
}

.ai-lab-feature-media {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #111111;
}

.ai-lab-feature-media video,
.ai-lab-feature-media img,
.ai-lab-feature-fallback {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ai-lab-feature-fallback {
  display: grid;
  place-items: center;
  padding: 2rem;
  background:
    radial-gradient(circle at 50% 10%, rgba(153, 0, 2, 0.26), transparent 38%),
    linear-gradient(145deg, #171717, #080808);
  color: rgba(255, 255, 255, 0.64);
  text-align: center;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.ai-lab-feature-body {
  padding: 2.2rem;
}

.ai-lab-feature-body h3 {
  margin: 0 0 0.9rem;
  color: #ffffff;
  font-size: 2.1rem;
  font-weight: 820;
  line-height: 1.15;
}

.ai-lab-feature-body div {
  color: var(--ai-muted);
  font-size: 1.45rem;
  line-height: 1.65;
}

.ai-lab-cta-section {
  text-align: center;
}

.ai-lab-cta {
  max-width: 68rem;
  margin: 0 auto;
}

.ai-lab-cta .ai-lab-subtitle {
  margin-bottom: 3.2rem;
}

.ai-lab-cta .ai-lab-button {
  min-width: 24rem;
}

.ai-lab-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: rgba(0, 0, 0, 0.78);
}

.ai-lab-modal.is-open {
  display: flex;
}

.ai-lab-modal-panel {
  position: relative;
  display: grid;
  grid-template-columns: minmax(22rem, 0.9fr) minmax(0, 1.1fr);
  width: min(100%, 86rem);
  max-height: min(90vh, 72rem);
  overflow: auto;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 1.4rem;
  background: #0d0d0d;
  box-shadow: 0 3rem 10rem rgba(0, 0, 0, 0.58);
}

@media screen and (min-width: 750px) {
  .ai-lab-modal-panel {
    overflow: hidden;
  }
}

.ai-lab-modal-media {
  min-height: 38rem;
  background: #141414;
}

.ai-lab-modal-media img,
.ai-lab-modal-media .ai-lab-character-fallback {
  width: 100%;
  height: 100%;
  min-height: 38rem;
  object-fit: cover;
}

.ai-lab-modal-body {
  padding: 3rem;
}

.ai-lab-modal-close {
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 3.8rem;
  height: 3.8rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.48);
  color: #ffffff;
  cursor: pointer;
}

.ai-lab-modal-body h3 {
  margin: 0 0 0.8rem;
  color: #ffffff;
  font-size: 3rem;
  font-weight: 850;
  line-height: 1.05;
}

.ai-lab-modal-persona {
  margin: 0 0 1.6rem;
  color: var(--ai-pink);
  font-size: 1.5rem;
  font-weight: 800;
}

.ai-lab-modal-copy {
  color: var(--ai-muted);
  font-size: 1.45rem;
  line-height: 1.7;
}

.ai-lab-match-form {
  margin-top: 2.2rem;
  padding-top: 2.2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.ai-lab-form-row {
  display: flex;
  gap: 1rem;
  margin-top: 1.3rem;
}

.ai-lab-email-input {
  flex: 1;
  min-height: 4.8rem;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  padding: 0 1.6rem;
  font-size: 1.45rem;
  box-shadow: none;
}

.ai-lab-email-input::placeholder {
  color: rgba(255, 255, 255, 0.45);
}

.ai-lab-form-message {
  margin-top: 1.2rem;
  color: var(--ai-cyan);
  font-size: 1.35rem;
  line-height: 1.45;
}

.ai-lab-sidebar-signup {
  position: fixed;
  top: 50%;
  right: 0;
  z-index: 1211;
  display: flex;
  align-items: stretch;
  width: min(36rem, calc(100vw - 1.6rem));
  color: #ffffff;
  transform: translate(calc(100% - 4.8rem), -50%);
  transition: right 320ms ease, transform 320ms ease;
}

.ai-lab-sidebar-signup.is-open {
  right: 50%;
  width: min(32.8rem, calc(100vw - 3.2rem));
  transform: translate(50%, -50%);
}

.ai-lab-sidebar-signup--image.is-open {
  width: min(86rem, calc(100vw - 6.4rem));
}

.ai-lab-sidebar-signup.is-open .ai-lab-sidebar-toggle {
  display: none;
}

.ai-lab-sidebar-signup.is-open .ai-lab-sidebar-panel {
  border-right: 1px solid rgba(153, 0, 2, 0.55);
  border-radius: 1.4rem;
}

.ai-lab-sidebar-signup.is-dismissed {
  display: none;
}

.ai-lab-sidebar-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1210;
  display: block;
  background: rgba(0, 0, 0, 0.58);
  opacity: 0;
  pointer-events: none;
  transition: opacity 240ms ease;
}

.ai-lab-sidebar-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}

.ai-lab-sidebar-toggle {
  display: grid;
  place-items: center;
  flex: 0 0 4.8rem;
  min-height: 13rem;
  border: 1px solid rgba(153, 0, 2, 0.72);
  border-right: 0;
  border-radius: 1.4rem 0 0 1.4rem;
  background: linear-gradient(180deg, rgba(153, 0, 2, 0.95), rgba(115, 0, 1, 0.95));
  color: #ffffff;
  cursor: pointer;
  box-shadow: 0 1.8rem 4.2rem rgba(0, 0, 0, 0.34);
}

.ai-lab-sidebar-toggle span {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  color: #ffffff;
  font-size: 1.15rem;
  font-weight: 850;
  line-height: 1;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.ai-lab-sidebar-panel {
  position: relative;
  flex: 1;
  padding: 2.2rem;
  border: 1px solid rgba(153, 0, 2, 0.55);
  border-right: 0;
  border-radius: 1.4rem 0 0 1.4rem;
  background:
    radial-gradient(circle at 0% 0%, rgba(153, 0, 2, 0.22), transparent 36%),
    rgba(13, 13, 13, 0.96);
  box-shadow: 0 2.4rem 7rem rgba(0, 0, 0, 0.46);
  backdrop-filter: blur(12px);
}

.ai-lab-sidebar-panel--image {
  display: flex;
  align-items: center;
  min-height: 36rem;
  aspect-ratio: 2 / 1;
  padding: 0;
  overflow: hidden;
  background: #050505;
}

.ai-lab-sidebar-media {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: block;
}

.ai-lab-sidebar-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}

.ai-lab-sidebar-panel--image::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.68) 0%, rgba(0, 0, 0, 0.5) 30%, rgba(0, 0, 0, 0.1) 52%, rgba(0, 0, 0, 0) 100%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.06), rgba(0, 0, 0, 0.12));
}

.ai-lab-sidebar-content {
  position: relative;
  z-index: 2;
}

.ai-lab-sidebar-panel--image .ai-lab-sidebar-content {
  width: min(42%, 34rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 3.6rem 0 3.6rem 3.6rem;
}

.ai-lab-sidebar-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: grid;
  place-items: center;
  width: 3.2rem;
  height: 3.2rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  cursor: pointer;
  z-index: 3;
}

.ai-lab-sidebar-heading {
  margin: 0 3.6rem 0.8rem 0;
  color: #ffffff;
  font-size: 2.2rem;
  font-weight: 850;
  line-height: 1.08;
}

.ai-lab-sidebar-copy {
  color: var(--ai-muted);
  font-size: 1.35rem;
  line-height: 1.55;
}

.ai-lab-sidebar-copy p {
  margin: 0;
}

.ai-lab-sidebar-form {
  margin-top: 1.6rem;
}

.ai-lab-sidebar-form .ai-lab-form-row {
  display: grid;
  gap: 0.9rem;
}

.ai-lab-modal-actions {
  margin-top: 2rem;
}

.ai-lab-modal-actions .ai-lab-button {
  width: 100%;
}

/* In-modal AI Lover chat frame (keeps the phone aspect ratio). */
.ai-lab-chat-frame {
  position: absolute;
  inset: 0;
  z-index: 3;
  background: #0d0d0d;
  border-radius: inherit;
  overflow: hidden;
}

.ai-lab-chat-frame[hidden] {
  display: none;
}

.ai-lab-chat-frame iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

/* 聊天打开时，把弹窗收成竖屏手机比例，贴合 H5 的移动端界面。 */
.ai-lab-modal-panel.is-chatting {
  grid-template-columns: 1fr;
  width: auto;
  height: min(90vh, 84rem);
  aspect-ratio: 9 / 19.5;
  max-width: 96vw;
  overflow: hidden;
}

.ai-lab-chat-placeholder {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-content: center;
  gap: 1rem;
  padding: 3rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 1.6rem;
  line-height: 1.6;
}

.ai-lab-chat-placeholder[hidden] {
  display: none;
}

.ai-lab-chat-placeholder-note {
  color: rgba(255, 255, 255, 0.4);
  font-size: 1.3rem;
  word-break: break-all;
}

@media screen and (max-width: 1099px) {
  .ai-lab-showcase,
  .ai-lab-quiz-layout {
    grid-template-columns: 1fr;
  }

  .ai-lab-profile,
  .ai-lab-preview {
    min-height: auto;
  }

  .ai-lab-preview {
    position: static;
  }

  .ai-lab-features-grid {
    grid-template-columns: 1fr;
  }
}

@media screen and (max-width: 749px) {
  .ai-lab-container {
    padding: 0 1.8rem;
  }

  .ai-lab-modal {
    padding: 1rem;
  }

  .ai-lab-sidebar-signup {
    top: 50%;
    bottom: auto;
    right: 0;
    width: 6.8rem;
    transform: translateY(-50%);
    pointer-events: none;
  }

  .ai-lab-sidebar-signup.is-open {
    top: 50%;
    bottom: auto;
    right: 50%;
    width: min(31rem, calc(100vw - 2rem));
    transform: translate(50%, -50%);
    pointer-events: auto;
  }

  .ai-lab-sidebar-signup--image.is-open {
    width: min(36rem, calc(100vw - 2rem));
  }

  .ai-lab-sidebar-toggle {
    align-self: center;
    flex: 0 0 7.4rem;
    width: 7.4rem;
    height: 5.2rem;
    min-height: 5.2rem;
    border-radius: 999px 0 0 999px;
    border-right: 1px solid rgba(153, 0, 2, 0.72);
    background: linear-gradient(180deg, rgba(153, 0, 2, 0.92), rgba(91, 0, 1, 0.92));
    box-shadow: 0 1.2rem 3rem rgba(0, 0, 0, 0.28);
    pointer-events: auto;
    transform: translateX(3.2rem);
    transition: transform 220ms ease, background 180ms ease, box-shadow 180ms ease;
  }

  .ai-lab-sidebar-toggle:hover,
  .ai-lab-sidebar-toggle:focus-visible {
    transform: translateX(1rem);
    background: linear-gradient(180deg, rgba(153, 0, 2, 0.98), rgba(91, 0, 1, 0.98));
    box-shadow: 0 1.4rem 3.4rem rgba(0, 0, 0, 0.36);
  }

  .ai-lab-sidebar-toggle span {
    display: block;
    writing-mode: horizontal-tb;
    text-orientation: mixed;
    width: 4.7rem;
    max-width: 4.7rem;
    text-align: center;
    font-size: 0;
    line-height: 1.05;
    letter-spacing: 0.03em;
    transform: translateX(-1.2rem);
  }

  .ai-lab-sidebar-toggle span::before {
    content: "AI";
    color: #ffffff;
    font-size: 1.25rem;
    font-weight: 900;
    letter-spacing: 0.04em;
  }

  .ai-lab-sidebar-panel {
    padding: 1.7rem;
  }

  .ai-lab-sidebar-signup:not(.is-open) .ai-lab-sidebar-panel {
    display: none;
  }

  .ai-lab-sidebar-signup.is-open .ai-lab-sidebar-panel {
    display: block;
  }

  .ai-lab-sidebar-signup.is-open .ai-lab-sidebar-toggle {
    display: none;
  }

  .ai-lab-sidebar-panel--image {
    min-height: auto;
    max-height: calc(100vh - 4rem);
    aspect-ratio: 4 / 5;
    padding: 0;
  }

  .ai-lab-sidebar-panel--image::after {
    background:
      linear-gradient(90deg, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.5) 46%, rgba(0, 0, 0, 0.08) 76%, rgba(0, 0, 0, 0) 100%),
      linear-gradient(180deg, rgba(0, 0, 0, 0.06), rgba(0, 0, 0, 0.14));
  }

  .ai-lab-sidebar-panel--image .ai-lab-sidebar-content {
    width: 58%;
    min-height: 100%;
    padding: 2rem 0 2rem 1.8rem;
  }

  .ai-lab-sidebar-heading {
    font-size: 1.9rem;
  }

  .ai-lab-sidebar-panel--image .ai-lab-sidebar-heading {
    font-size: 1.8rem;
    margin-right: 3.4rem;
  }

  .ai-lab-sidebar-panel--image .ai-lab-sidebar-copy {
    font-size: 1.18rem;
    line-height: 1.45;
  }

  .ai-lab-sidebar-panel--image .ai-lab-eyebrow {
    margin-bottom: 0.7rem;
    font-size: 1rem;
  }

  .ai-lab-sidebar-panel--image .ai-lab-sidebar-form {
    margin-top: 1.2rem;
  }

  .ai-lab-section {
    padding: 5.2rem 0;
  }

  .ai-lab-showcase {
    gap: 1.6rem;
  }

  .ai-lab-title {
    font-size: 2.65rem;
    line-height: 1.08;
  }

  .ai-lab-intro-panel h2,
  .ai-lab-profile h3 {
    font-size: 2.35rem;
    line-height: 1.12;
  }

  .ai-lab-intro-panel,
  .ai-lab-profile,
  .ai-lab-quiz-card,
  .ai-lab-preview {
    padding: 2rem;
    border-radius: 1rem;
  }

  .ai-lab-carousel {
    min-height: 42rem;
    padding-bottom: 0;
    overflow: hidden;
  }

  .ai-lab-character-stage {
    min-height: 39rem;
  }

  .ai-lab-character-card {
    width: min(70%, 24.8rem);
    border-radius: 1.4rem;
  }

  .ai-lab-carousel-controls {
    left: 0;
    right: 0;
    top: 50%;
    bottom: auto;
    width: 100%;
    justify-content: space-between;
    padding: 0 0.2rem;
    transform: translateY(-50%);
    pointer-events: none;
  }

  .ai-lab-carousel-controls .ai-lab-icon-button {
    width: 4rem;
    height: 4rem;
    pointer-events: auto;
  }

  .ai-lab-character-card.is-prev {
    transform: translate(calc(-96% + var(--ai-drag-x, 0px)), -50%) scale(0.75);
  }

  .ai-lab-character-card.is-next {
    transform: translate(calc(-4% + var(--ai-drag-x, 0px)), -50%) scale(0.75);
  }

  .ai-lab-character-card__caption strong {
    font-size: 1.8rem;
  }

  .ai-lab-profile-copy {
    font-size: 1.38rem;
  }

  .ai-lab-modal-panel {
    grid-template-columns: minmax(0, 0.42fr) minmax(0, 0.58fr);
    grid-template-areas:
      "media info"
      "form form";
    max-height: calc(100dvh - 2rem);
    border-radius: 1.1rem;
  }

  .ai-lab-modal-media {
    grid-area: media;
    overflow: hidden;
    align-self: start;
  }

  .ai-lab-modal-media,
  .ai-lab-modal-media img {
    height: auto;
    min-height: 0;
  }

  .ai-lab-modal-media {
    background: transparent;
  }

  .ai-lab-modal-media img {
    display: block;
    width: 100%;
    aspect-ratio: auto;
    object-fit: contain;
    object-position: center center;
  }

  .ai-lab-modal-media .ai-lab-character-fallback {
    min-height: 16rem;
  }

  .ai-lab-modal-body {
    display: contents;
    padding: 0;
  }

  .ai-lab-modal-info {
    grid-area: info;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 1.35rem 1.4rem 1.15rem 1.1rem;
  }

  .ai-lab-modal-close {
    top: 0.9rem;
    right: 0.9rem;
    width: 3.4rem;
    height: 3.4rem;
  }

  .ai-lab-modal-body .ai-lab-eyebrow {
    margin-bottom: 0.45rem;
    font-size: 1.1rem;
  }

  .ai-lab-modal-body h3 {
    margin-bottom: 0.35rem;
    font-size: 2.2rem;
  }

  .ai-lab-modal-persona {
    margin-bottom: 0.9rem;
    font-size: 1.35rem;
  }

  .ai-lab-modal-body .ai-lab-profile-meta {
    display: flex;
    gap: 0.42rem;
    margin-bottom: 0;
  }

  .ai-lab-modal-body .ai-lab-pill {
    padding: 0.32rem 0.56rem;
    font-size: 0.92rem;
    line-height: 1.1;
  }

  .ai-lab-modal-copy[data-ai-modal-copy],
  .ai-lab-match-form > .ai-lab-modal-copy {
    display: none;
  }

  .ai-lab-match-form {
    grid-area: form;
    margin-top: 0;
    padding: 1.2rem 1.6rem 1.6rem;
  }

  .ai-lab-form-row {
    margin-top: 0.8rem;
    flex-direction: column;
  }

  .ai-lab-email-input,
  .ai-lab-modal .ai-lab-button {
    min-height: 4.35rem;
  }

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