* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --black: #000000;
  --panel: #171a20;
  --orange: #f39a35;
  --light: #fff;
  --text: #262a30;
  --safe-width: 1200px;
  --content-width: calc(var(--safe-width) * .7);
  --header-offset: 4rem;
  --font-cn: "MiSans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-en: "Montserrat", "MiSans", "PingFang SC", "Microsoft YaHei", sans-serif;
}

@media (max-width: 1300px) {
  :root {
    --safe-width: 75vw;
  }
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  overflow-x: hidden;
  background: var(--black);
  color: #fff;
  font-family: var(--font-cn);
}

.font-en {
  font-family: var(--font-en);
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

img {
  display: block;
  width: 100%;
  height: auto;
  user-select: none;
  -webkit-user-drag: none;
}

.dark-section {
  background: var(--black);
  color: #fff;
}

.light-section {
  background: var(--light);
  color: var(--text);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 60;
  width: 100%;
  height: var(--header-offset);
  background: rgba(8, 8, 8, .96);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-100%);
  transition: opacity .3s ease, visibility .3s ease, transform .3s ease;
}

.site-header__inner {
  display: flex;
  align-items: center;
  width: var(--safe-width);
  height: 100%;
  margin: 0 auto;
}

.site-header.is-scrolled {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.site-header-placeholder {
  display: none;
}

body.has-fixed-header #header {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-100%);
}

.brand {
  font-size: 1.65rem;
  font-weight: 750;
}

.site-nav {
  display: flex;
  gap: 2.2rem;
  margin-left: auto;
  font-size: .84rem;
}

.site-nav a {
  white-space: nowrap;
  color: rgba(255, 255, 255, .88);
}

.buy-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .625rem;
  min-width: 7rem;
  height: 2.3rem;
  margin-left: 2rem;
  background: var(--orange);
  color: #101010;
  font-size: .84rem;
  font-weight: 750;
}

.buy-link span {
  display: inline-grid;
  place-items: center;
  width: 1.25rem;
  height: 1.25rem;
  flex: 0 0 1.25rem;
  filter: brightness(0);
}

.buy-link span img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.hero {
  position: relative;
  width: 100%;
  min-height: 0;
  aspect-ratio: 3840 / 2005;
  overflow: hidden;
  background: #0a0c12;
  --hero-overlay-opacity: 0;
  --hero-blur: 0px;
}

.hero::after {
  position: absolute;
  z-index: 1;
  inset: 0;
  content: "";
  pointer-events: none;
  background: rgba(0, 0, 0, var(--hero-overlay-opacity));
}

.hero__kv {
  width: 100%;
  height: auto;
  object-fit: contain;
  filter: blur(var(--hero-blur));
  will-change: filter;
}



.hero__content {
  position: absolute;
  top: 15%;
  right: 0;
  left: 0;
  z-index: 2;
  width: min(60rem, calc(100% - 3rem));
  margin-inline: auto;
  text-align: center;
}

.hero h1 {
  font-size: 6rem;
  line-height: .95;
  font-weight: 800;
}

.hero p {
  margin-top: 1.2rem;
  font-size: 1.6rem;
}

.intro__scroll-copy {
  position: absolute;
  z-index: 4;
  right: 0;
  left: 0;
  top: -30vh;
  width: var(--safe-width);
  margin-inline: auto;
  color: rgba(255, 255, 255, 1);
  opacity: 0;
  pointer-events: none;
}

.intro__scroll-copy p {
  margin: 0;
  font-size: 18px;
  line-height: 1.8;
  text-align: center;
  font-weight: 300;
}

.intro__scroll-copy h3 {
  margin-bottom: .8rem;
  font-size: clamp(1.2rem, 1.5vw, 1.5rem);
  line-height: 1.25;
  font-weight: 650;
  text-align: center;
}

.intro__scroll-copy p+p {
  margin-top: .8rem;
}

.section-heading {
  width: var(--safe-width);
  margin: 0 auto;
  text-align: left;
}

#algorithms .section-heading {
  width: var(--content-width);
}

.section-heading>span,
.poster-copy>span {
  display: block;
  margin-bottom: .65rem;
  color: var(--orange);
  font-size: 1.25rem;
  font-weight: 600;
}

.section-heading h2,
.poster-copy h2 {
  font-size: calc(40 / 16 * 1rem);
  line-height: 1.18;
  font-weight: 650;
}

.section-heading p,
.poster-copy p {
  max-width: 144rem;
  margin-top: 1.05rem;
  color: rgba(255, 255, 255, .66);
  font-size: 1rem;
  line-height: 1.75;
}

#visual-control .poster-copy p {
  text-shadow: 0px 0px 4px rgb(27 26 26);
}

.section-heading--light p {
  color: rgba(38, 42, 48, .65);
}

.feature-mosaic {
  position: relative;
  z-index: 2;
  padding: 16vh 0 8vh;
}

#intro {
  position: relative;
  z-index: 2;
  background: linear-gradient(to bottom, #161821 0%, #0b0d14 70%, #000000 100%);
}

.feature-mosaic__row {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  width: var(--safe-width);
  margin: 0 auto;
}

.feature-mosaic__row+.feature-mosaic__row {
  margin-top: 1rem;
}

.mosaic-card {
  position: relative;
  flex: var(--card-weight) 1 0;
  min-width: 0;
  overflow: hidden;
  border-radius: .5rem;
  background: #252b36;
}

.mosaic-card>img {
  width: 100%;
  height: auto;
  transition: transform .65s ease;
}

.mosaic-card:hover>img {
  /* transform: scale(1.025); */
}

.mosaic-copy {
  position: absolute;
  top: 1.45rem;
  left: 1.55rem;
  z-index: 3;
  max-width: calc(100% - 3rem);
}

.feature-mosaic__row:nth-child(1) .mosaic-card:nth-child(2) .mosaic-copy {
  top: 1.45rem;
  right: 1.55rem;
  text-align: right;
}

.mosaic-copy h2 {
  font-size: clamp(1rem, 1.45vw, 1.5rem);
  line-height: 1.25;
  font-weight: 650;
}

.mosaic-copy h2 b {
  font-size: clamp(1rem, 1.45vw, 1.8rem);
  font-weight: 600;
}

.mosaic-copy p {
  margin-top: .45rem;
  color: rgba(255, 255, 255, .68);
  font-size: .9rem;
  line-height: 1.45;
}

.controller-subcard,
.chassis-subcard {
  position: absolute;
  z-index: 2;
}

.controller-subcard {
  top: 20%;
  right: 3.1%;
  width: 25.5%;
}

.chassis-subcard {
  top: 8.5%;
  right: 4.5%;
  width: 40%;
}

.controller-subcard img,
.chassis-subcard img {
  width: 100%;
}

.controller-subcard__label,
.chassis-subcard__label {
  position: absolute;
  z-index: 2;
  color: rgba(255, 255, 255, .92);
  font-size: .7rem;
  line-height: 1;
  white-space: nowrap;
}

.controller-subcard__label--esp32 {
  top: 28%;
  left: 16%;
}

.controller-subcard__label--stm32 {
  top: 59%;
  left: 13%;
}

.controller-subcard__label--mcu51 {
  top: 92%;
  left: 13%;
}

.chassis-subcard__label {
  bottom: 7%;
  transform: translateX(-50%);
}

.chassis-subcard__label--fixed {
  left: 26%;
  bottom: 55%;
}

.chassis-subcard__label--mobile {
  left: 76%;
  bottom: 55%;
}

.chassis-subcard__label--mecanum {
  left: 25%;
  bottom: 4%;
}

.chassis-subcard__label--tracked {
  left: 75%;
  bottom: 4%;
}

.joint-video-section {
  position: relative;
  width: 100%;
  padding: 0 0 8vh;
  overflow: clip;
}

.joint-video-section__stage {
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  overflow: visible;
}

.joint-video-section__media {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #111;
  transform: translate(-50%, -50%);
  will-change: width;
}

.joint-video-section__media video,
.static-video-section__media video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.joint-video-section__copy {
  position: absolute;
  left: 50%;
  overflow: hidden;
  transform: translateX(-50%);
  will-change: opacity, transform;
}

.vertical-carousel-section,
.media-carousel,
.static-video-section {
  padding: 8vh 0;
  overflow: hidden;
}

#algorithms.media-carousel {
  padding-bottom: 16vh;
}

#modular.static-video-section {
  padding-top: 16vh;
}

#ros-control.static-video-section {
  padding-bottom: 16vh;
}

#depth-kinematics .static-video-section {
  padding-top: 16vh;
}

.vertical-carousel-section {
  padding: 12vh 0 8vh;
}

#scenes {
  padding-bottom: 16vh;
}

.vertical-carousel {
  position: relative;
  width: var(--safe-width);
  margin: 4.2rem auto 0;
  outline: 0;
}

.vertical-carousel__nav {
  position: absolute;
  top: 0%;
  left: 7%;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  width: 21%;
  /* transform: translateY(-50%); */
}

.vertical-carousel__nav::before {
  content: "";
  position: absolute;
  top: 4%;
  bottom: 4%;
  left: 0;
  width: 1px;
  background: rgba(255, 255, 255, .52);
}

.vertical-carousel__nav button {
  position: relative;
  width: 100%;
  height: 5.1rem;
  padding: 0 0 0 2.35rem;
  border: 0;
  background: transparent;
  color: rgba(255, 255, 255, .5);
  text-align: left;
  cursor: pointer;
  transition: color .35s ease;
}

.vertical-carousel__nav button::before {
  content: "";
  position: absolute;
  top: 0;
  left: -1px;
  width: 3px;
  height: 100%;
  background: var(--orange);
  opacity: 0;
  transform: scaleY(.15);
  transform-origin: center;
  transition: opacity .35s ease, transform .45s cubic-bezier(.22, 1, .36, 1);
}

.vertical-carousel__nav button.is-active {
  color: #fff;
}

.vertical-carousel__nav button.is-active::before {
  opacity: 1;
  transform: scaleY(.72);
}

.vertical-carousel__stage {
  width: 72%;
  margin-left: auto;
  aspect-ratio: 1300 / 727;
  overflow: hidden;
  border-radius: .5rem;
  background: #15171b;
}

.vertical-carousel__track {
  position: relative;
  height: 100%;
}

.vertical-carousel__slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity .58s ease, visibility .58s ease;
  will-change: opacity;
}

.vertical-carousel__slide.is-active {
  z-index: 2;
  opacity: 1;
  visibility: visible;
}

.vertical-carousel__slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.static-video-section__media {
  width: var(--safe-width);
  margin: 4rem auto 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: .5rem;
  background: #141414;
}

#embodied-ai {
  position: relative;
  z-index: 2;
  isolation: isolate;
  background: var(--black);
}

#embodied-ai::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  content: "";
  background: var(--black);
  pointer-events: none;
}

.carousel-shell {
  position: relative;
  width: 100%;
  margin-top: 4rem;
  outline: 0;
}

.carousel-track {
  display: flex;
  align-items: center;
  gap: .5rem;
  width: max-content;
  will-change: transform;
}

.carousel-slide {
  flex: 0 0 calc(var(--safe-width) * .7);
  width: calc(var(--safe-width) * .7);
  overflow: hidden;
  border-radius: .5rem;
  opacity: .7;
  transform: scale(.985);
}

.carousel-slide img,
.carousel-slide video {
  display: block;
  width: 100%;
  height: auto;
}

#scenes .carousel-slide {
  aspect-ratio: 1300 / 727;
  background: #111;
}

#scenes .carousel-slide video {
  height: 100%;
  object-fit: cover;
}

.carousel-arrow {
  position: absolute;
  top: 50%;
  z-index: 5;
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid rgb(60 53 53 / 25%);
  border-radius: 50%;
  background: rgb(56 60 59 / 70%);
  color: #fff;
  cursor: pointer;
  transform: translateY(-50%);
}

.carousel-arrow--prev {
  left: max(1.25rem, calc((100vw - var(--content-width)) / 2 - 4.5rem));
}

.carousel-arrow--next {
  right: max(1.25rem, calc((100vw - var(--content-width)) / 2 - 4.5rem));
}

.carousel-arrow span {
  font-size: 1.8rem;
  line-height: 1;
  transform: translateY(-.1rem);
}

.carousel-arrow[hidden] {
  display: none;
}

.carousel-tabs {
  display: flex;
  width: 34rem;
  max-width: calc(100% - 2rem);
  min-height: 2.6rem;
  margin: 2rem auto 0;
  padding: .25rem;
  border-radius: 999rem;
  background: #1c1d20;
}

.carousel-tabs--sensors {
  width: 50rem;
}

.carousel-tabs--compact {
  width: 24rem;
}

.carousel-tabs button {
  flex: 1;
  min-width: 0;
  border: 0;
  border-radius: 1rem;
  background: transparent;
  color: rgba(255, 255, 255, .7);
  font-size: .82rem;
  cursor: pointer;
  white-space: nowrap;
  transition: color .3s ease, background-color .3s ease;
}

.carousel-tabs button:hover {
  color: #fff;
}

.carousel-tabs button.is-active {
  background: #fff;
  color: #111;
  font-weight: 550;
}

.poster-section {
  position: relative;
  overflow: hidden;
}

.poster-section>img {
  width: 100%;
  min-height: 42rem;
  object-fit: cover;
}

.poster-section::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(0, 0, 0, .5), transparent 58%);
  pointer-events: none;
}

.poster-copy {
  position: absolute;
  top: 16%;
  left: max(2rem, calc((100vw - var(--safe-width)) / 2 - .5%));
  z-index: 2;
  width: 32rem;
}

.section-cover-layer {
  position: relative;
  isolation: isolate;
}

.sticky-cover-content {
  position: relative;
  z-index: 10;
}

.fade-feature {
  --control-cover-dim: 0;
  padding: 16vh 0 16vh;
  overflow: hidden;
}

#ai-fusion .section-heading {
  width: var(--content-width);
  text-align: center;
}

.fade-feature::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 20;
  background: #000;
  opacity: var(--control-cover-dim);
  pointer-events: none;
}

.fade-feature__stage {
  position: relative;
  width: var(--safe-width);
  margin: 2rem auto 0;
  aspect-ratio: 1200 / 675;
  overflow: hidden;
  border-radius: .5rem;
  background: #e7e7e7;
  outline: 0;
}

.fade-feature--3d .fade-feature__stage {
  aspect-ratio: 1800 / 713;
  overflow: visible;
  perspective: 1200px;
  background: transparent;
}

.fade-feature--3d .fade-feature__slide {
  top: 50%;
  bottom: auto;
  right: auto;
  left: 20%;
  width: 60%;
  height: auto;
  transition: none;
  transform-origin: center center;
  backface-visibility: hidden;
  border-radius: .45rem;
}

.fade-feature__tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem 4.5rem;
  width: 46rem;
  max-width: var(--safe-width);
  margin: 2rem auto 0;
}

.fade-feature__tabs button {
  flex: 0 0 11.5rem;
  min-width: 0;
  height: 2.65rem;
  padding: 0 1.2rem;
  border: 1px solid rgba(25, 29, 34, .22);
  border-radius: 999px;
  background: #262728;
  color: rgb(245, 245, 245);
  cursor: pointer;
  transition: border-color .3s ease, color .3s ease, background-color .3s ease;
}

.fade-feature__slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  visibility: hidden;
  transform: scale(1.015);
  transition: opacity .55s ease, visibility .55s ease, transform .7s ease;
}

.fade-feature__slide.is-active {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
}

.fade-feature__tabs button:hover {
  border-color: #24282e;
  background: #262728;
  color: #d9d9da;
}

.fade-feature__tabs button.is-active {
  border-color: #f1f1f1;
  background: #f1f1f1;
  color: #050505;
  font-weight: 600;
}

.specs {
  z-index: 12;
  padding: 10vh 0 6rem;
  background: #fff;
}

.specs__inner {
  width: var(--safe-width);
  margin: 0 auto;
}

.specs__heading {
  margin-bottom: 5rem;
}

.specs__heading h2 {
  color: #30343a;
  font-size: 2.4rem;
  line-height: 1.15;
}

.specs__heading p {
  margin-top: .65rem;
  color: #757a80;
  font-size: 1rem;
}

.specs-table {
  color: #4d535b;
  font-size: 1rem;
}

.specs-row {
  display: grid;
  grid-template-columns: 13.5rem repeat(3, 1fr);
  min-height: 5.25rem;
  border-bottom: 1px solid #d7d9dd;
}

.specs-row>div {
  display: flex;
  align-items: center;
  min-width: 0;
  line-height: 1.45;
}

.specs-label {
  padding-left: 30%;
  color: #424242;
  font-weight: 600;
}

.specs-value {
  grid-column: 2 / 5;
  padding-left: 5.4rem;
  color: #4d535b;
}

.specs__image {
  display: block;
  width: 25vw;
  margin: 4rem auto 0;
  object-fit: contain;
}

.product-faq {
  width: var(--safe-width);
  margin: 0rem auto 0;
  padding-top: 8rem;
  color: #30343a;
}

.product-faq__heading {
  margin-bottom: 3rem;
}

.product-faq__heading span {
  display: block;
  margin-bottom: .65rem;
  color: var(--orange);
  font-size: 1rem;
  font-weight: 600;
}

.product-faq__heading h2 {
  font-size: 2.4rem;
  line-height: 1.15;
}

.product-faq__list {
  /* border-top: 1px solid #d7d9dd; */
}

.product-faq__item {
  border-bottom: 1px solid #d7d9dd;
}

.product-faq__item:last-child {
  border-bottom: none
}

.product-faq__item summary {
  display: grid;
  grid-template-columns: 3.5rem minmax(0, 1fr) 1.5rem;
  gap: 1rem;
  align-items: center;
  min-height: 5.25rem;
  color: #30343a;
  cursor: pointer;
  list-style: none;
}

.product-faq__item summary::-webkit-details-marker {
  display: none;
}

.product-faq__item summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: -2px;
}

.product-faq__number {
  color: #757a80;
  font-family: var(--font-en);
  font-size: .9rem;
  font-weight: 600;
  transition: color .25s ease;
}

.product-faq__question {
  font-size: 1rem;
  line-height: 1.5;
  font-weight: 600;
}

.product-faq__arrow {
  justify-self: end;
  width: 0;
  height: 0;
  border-right: .38rem solid transparent;
  border-left: .38rem solid transparent;
  border-top: .5rem solid #757a80;
  transition: transform .25s ease, border-top-color .25s ease;
}

.product-faq__item[open] .product-faq__number {
  color: var(--orange);
}

.product-faq__item[open] .product-faq__arrow {
  border-top-color: var(--orange);
  transform: rotate(180deg);
}

.product-faq__answer {
  max-width: calc(100% - 5rem);
  padding: 0 0 2.2rem 4.5rem;
  color: #757a80;
  font-size: 1rem;
  line-height: 1.85;
}

.product-faq__answer a {
  color: var(--orange);
}

.product-faq__answer p+p {
  margin-top: .65rem;
}

.product-faq__answer strong {
  color: #4d535b;
}

.product-faq__message {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 8rem;
  width: min(38rem, 60%);
  height: 3.5rem;
  margin: 5rem auto 0;
  overflow: hidden;
  border-radius: 2rem;
  background: #d7d9dd;
}

.product-faq__message-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.product-faq__message input {
  min-width: 0;
  padding: 0 1.75rem;
  border: 0;
  outline: 0;
  background: transparent;
  color: #30343a;
  font: inherit;
  text-align: center;
}

.product-faq__message input::placeholder {
  color: #757a80;
  opacity: 1;
}

.product-faq__message button {
  border: 0;
  background: var(--black);
  color: var(--light);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background-color .25s ease, color .25s ease;
}

.product-faq__message button:hover {
  background: var(--orange);
  color: var(--black);
}

.product-faq__message:focus-within {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

.product-faq__success {
  position: fixed;
  inset: 0;
  width: min(30rem, calc(100% - 2rem));
  margin: auto;
  padding: 3.5rem 3rem 3rem;
  border: 0;
  border-radius: .5rem;
  background: var(--light);
  color: #30343a;
  text-align: center;
  box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, .3);
}

.product-faq__success::backdrop {
  background: rgba(0, 0, 0, .56);
}

.product-faq__success[open] {
  animation: faq-dialog-in .25s ease both;
}

.product-faq__success-close {
  position: absolute;
  top: .8rem;
  right: .8rem;
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border: 0;
  background: transparent;
  color: #757a80;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.product-faq__success-close:hover,
.product-faq__success-close:focus-visible {
  color: var(--black);
}

.product-faq__success-close:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 1px;
}

.product-faq__success-mark {
  display: grid;
  place-items: center;
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto 1.5rem;
  border: 2px solid var(--orange);
  border-radius: 50%;
  color: var(--orange);
  font-size: 1.65rem;
  font-weight: 700;
}

.product-faq__success p {
  font-size: 1.2rem;
  line-height: 1.6;
  font-weight: 600;
}

@keyframes faq-dialog-in {
  from {
    opacity: 0;
    transform: translateY(1rem) scale(.97);
  }

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

@media (max-width: 1920px) {
  .hero__content {
    top: 15%;
  }
}



@media (max-width: 900px) {
  :root {
    --safe-width: calc(100vw - 2rem);
    --content-width: var(--safe-width);
    --header-offset: 3.5rem;
  }

  .site-nav {
    display: none;
  }

  .brand {
    font-size: 1.25rem;
  }

  .buy-link {
    min-width: 5.5rem;
    height: 2rem;
    margin-left: auto;
  }

  .hero {
    min-height: 0;
  }

  .hero h1 {
    font-size: 3.6rem;
  }

  .hero p {
    font-size: 1.2rem;
  }

  .intro__scroll-copy {
    right: 0;
    top: 12vh;
    width: calc(100% - 2rem);
  }

  .intro__scroll-copy p {
    font-size: .68rem;
    line-height: 1.55;
  }

  .section-heading h2,
  .poster-copy h2 {
    font-size: 2rem;
  }

  .feature-mosaic {
    padding: 2.5rem 0 6rem;
  }

  .feature-mosaic__row {
    gap: .65rem;
  }

  .feature-mosaic__row+.feature-mosaic__row {
    margin-top: .65rem;
  }

  .mosaic-copy {
    top: .8rem;
    left: .9rem;
  }

  .mosaic-copy h2 {
    font-size: .86rem;
  }

  .mosaic-copy p {
    display: none;
  }

  .controller-subcard__label,
  .chassis-subcard__label {
    font-size: .38rem;
  }

  .joint-video-section {
    min-height: 0;
    padding: 5rem 0;
    overflow: hidden;
  }

  .joint-video-section__stage {
    position: relative;
  }

  .joint-video-section__media {
    position: relative;
    top: auto;
    left: auto;
    width: var(--safe-width);
    margin: 2.5rem auto 0;
    transform: none;
    border-radius: .4rem;
  }

  .joint-video-section__copy {
    position: relative;
    top: auto;
    left: auto;
    transform: none;
  }

  .vertical-carousel-section,
  .media-carousel,
  .static-video-section {
    padding: 6rem 0;
  }

  .vertical-carousel {
    margin-top: 2.5rem;
  }

  .vertical-carousel__nav {
    position: static;
    flex-direction: row;
    width: 100%;
    margin-bottom: 1rem;
    overflow-x: auto;
    transform: none;
  }

  .vertical-carousel__nav::before {
    display: none;
  }

  .vertical-carousel__nav button {
    flex: 0 0 auto;
    width: auto;
    height: auto;
    padding: .7rem .9rem;
    border: 1px solid rgba(255, 255, 255, .18);
    border-radius: 999px;
  }

  .vertical-carousel__nav button::before {
    display: none;
  }

  .vertical-carousel__stage {
    width: 100%;
  }

  .static-video-section__media {
    margin-top: 2.5rem;
  }

  .carousel-shell {
    margin-top: 2.5rem;
  }

  .carousel-slide {
    flex-basis: 86vw;
    width: 86vw;
  }

  .carousel-arrow {
    display: none;
  }

  .carousel-tabs {
    width: calc(100vw - 2rem);
    overflow-x: auto;
  }

  .carousel-tabs button {
    flex: 0 0 auto;
    min-width: 7rem;
    padding: 0 1rem;
  }

  .fade-feature__tabs {
    flex-wrap: nowrap;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: .5rem;
  }

  .fade-feature__tabs button {
    flex: 0 0 auto;
    min-width: 7rem;
  }

  .poster-section>img {
    min-height: 34rem;
    object-position: 62% center;
  }

  .poster-copy {
    top: 12%;
    width: calc(100% - 4rem);
  }

  .fade-feature {
    padding: 6rem 0;
  }

  .fade-feature__stage {
    margin-top: 2.5rem;
  }

  .specs {
    padding: 6rem 0 4rem;
  }

  .specs__heading {
    margin-bottom: 3rem;
  }

  .specs-row {
    grid-template-columns: 8rem 1fr;
    min-height: 4.75rem;
  }

  .specs-label {
    padding-left: .5rem;
  }

  .specs-value {
    grid-column: 2;
    padding-left: 1rem;
  }

  .specs__image {
    width: 94vw;
    margin-top: 3rem;
  }

  .product-faq {
    margin-top: 5rem;
  }

  .product-faq__heading {
    margin-bottom: 6rem;
  }

  .product-faq__item summary {
    grid-template-columns: 2.5rem minmax(0, 1fr) 1rem;
    gap: .75rem;
    min-height: 4.75rem;
  }

  .product-faq__answer {
    max-width: 100%;
    padding: 0 1rem 1.8rem 3.25rem;
  }

  .product-faq__message {
    width: min(32rem, 80%);
    margin-top: 4rem;
  }
}

@media (max-width: 620px) {

  .hero {
    min-height: 0;
  }

  .hero__content {
    top: 18%;
  }

  .hero h1 {
    font-size: 2.8rem;
  }

  .fade-feature--3d .fade-feature__slide {
    left: 11%;
    width: 78%;
  }

  .fade-feature--3d .fade-feature__stage {
    aspect-ratio: 1.65 / 1;
  }

  .feature-mosaic__row {
    flex-direction: column;
  }

  .mosaic-card {
    width: 100%;
  }

  .mosaic-copy {
    top: 1.25rem;
    left: 1.3rem;
  }

  .mosaic-copy h2 {
    font-size: 1.15rem;
  }

  .mosaic-copy p {
    display: block;
    font-size: .7rem;
  }

  .controller-subcard__label,
  .chassis-subcard__label {
    font-size: .55rem;
  }

  .section-heading p,
  .poster-copy p {
    font-size: .9rem;
  }

  .specs-row {
    grid-template-columns: 7.5rem 1fr;
  }

  .product-faq__heading h2 {
    font-size: 2rem;
  }

  .product-faq__question {
    font-size: 1rem;
  }

  .product-faq__answer {
    padding-left: 0;
    font-size: .9rem;
  }

  .product-faq__message {
    grid-template-columns: minmax(0, 1fr) 6rem;
    width: 100%;
    height: 3.25rem;
  }

  .product-faq__message input {
    padding: 0 .8rem;
    font-size: .8rem;
  }

  .product-faq__message button {
    font-size: .85rem;
  }

  .product-faq__success {
    padding: 3rem 1.5rem 2.5rem;
  }

  .product-faq__success p {
    font-size: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}

/* ArmPi Ultra page-specific components. */
.armpi-ultra-page .feature-mosaic__row--top .mosaic-card,
.armpi-ultra-page .feature-mosaic__row--bottom .mosaic-card {
  background: var(--panel);
}

.armpi-ultra-page .openclaw-subcard {
  position: absolute;
  bottom: 1.35rem;
  left: 1.55rem;
  z-index: 2;
  width: 44%;
}

.armpi-ultra-page .openclaw-subcard img {
  width: 100%;
  height: auto;
}

.armpi-ultra-page .torque-subcard {
  position: absolute;
  bottom: 6%;
  left: 7%;
  z-index: 2;
  width: 35%;
}

.armpi-ultra-page .torque-subcard img {
  display: block;
  width: 100%;
  height: auto;
}

.armpi-ultra-page .torque-subcard__label {
  position: absolute;
  right: 0;
  bottom: .45rem;
  left: 0;
  color: rgba(255, 255, 255, .68);
  font-size: clamp(.56rem, .65vw, .75rem);
  line-height: 1.2;
  text-align: center;
}

.armpi-ultra-page .mosaic-copy__title-with-icon {
  display: flex;
  align-items: flex-end;
  gap: .55rem;
}

.armpi-ultra-page .mosaic-copy__title-with-icon>img {
  flex: 0 0 auto;
  width: 1.8rem;
  height: auto;
  margin-bottom: .08rem;
}

.armpi-ultra-page .extension-subcard {
  position: absolute;
  top: 12%;
  right: 3.5%;
  z-index: 2;
  width: 47%;
}

.armpi-ultra-page .extension-subcard img {
  width: 100%;
  height: auto;
}

.armpi-ultra-page .extension-subcard__label {
  position: absolute;
  z-index: 2;
  color: rgba(255, 255, 255, .92);
  font-size: .82rem;
  line-height: 1;
  white-space: nowrap;
  transform: translateX(-50%);
}

.armpi-ultra-page .extension-subcard__label--mecanum {
  bottom: 54%;
  left: 25%;
}

.armpi-ultra-page .extension-subcard__label--rail {
  right: 25%;
  bottom: 54%;
  transform: translateX(50%);
}

.armpi-ultra-page .extension-subcard__label--conveyor {
  bottom: 6%;
  left: 50%;
}

.armpi-ultra-page .static-video-section__media--image {
  display: flex;
  align-items: center;
  justify-content: center;
}

.armpi-ultra-page .static-video-section__media--image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.armpi-ultra-page .poster-section>img {
  min-height: 0;
  object-fit: contain;
}

.armpi-ultra-page .static-video-section.sticky-cover-content {
  --control-cover-dim: 0;
}

.armpi-ultra-page .static-video-section.sticky-cover-content::after {
  position: absolute;
  z-index: 20;
  inset: 0;
  content: "";
  background: var(--black);
  opacity: var(--control-cover-dim);
  pointer-events: none;
}

.armpi-ultra-page .specs-row--package-first {
  border-bottom: 0;
}

.armpi-ultra-page .ai-model {
  display: grid;
  grid-template-columns: 34rem 1fr;
  gap: 5.5rem;
  align-items: center;
  min-height: calc(100vh - var(--header-offset));
  padding: 8vh 0 16vh 7.8%;
  border-bottom: 0;
}

.armpi-ultra-page .ai-model .section-heading {
  width: auto;
  margin: 0;
  text-align: left;
}

.armpi-ultra-page .ai-model__openclaw-title {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
}

.armpi-ultra-page .ai-model__openclaw-icon {
  display: block;
  flex: 0 0 auto;
  width: auto;
  height: 1em;
}

.armpi-ultra-page .ai-model__copy {
  min-width: 0;
}

.armpi-ultra-page .chat-row,
.armpi-ultra-page .chat-preview-row {
  display: grid;
  grid-template-columns: 2.875rem minmax(0, 17rem) 2.875rem;
  align-items: flex-end;
  column-gap: 1.75rem;
  width: 25.25rem;
}

.armpi-ultra-page .chat-row--left {
  margin-top: 9rem;
}

.armpi-ultra-page .chat-row--right,
.armpi-ultra-page .chat-preview-row {
  margin-top: 3rem;
}

.armpi-ultra-page .chat-row--compact {
  margin-top: 1.75rem;
}

.armpi-ultra-page .chat-avatar {
  width: 4rem;
  height: 4rem;
  border-radius: 50%;
  object-fit: cover;
}

.armpi-ultra-page .chat-avatar--text {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--panel);
  color: var(--light);
  font-size: .875rem;
  font-weight: 650;
}

.armpi-ultra-page .chat-row--media-left .chat-avatar {
  grid-column: 1;
  align-self: flex-start;
}

.armpi-ultra-page .chat-row--media-left .chat-bubble {
  grid-column: 2;
  justify-self: start;
}

.armpi-ultra-page .chat-row--media-right .chat-bubble,
.armpi-ultra-page .chat-row--media-right .chat-preview {
  grid-column: 2;
}

.armpi-ultra-page .chat-row--media-right .chat-bubble {
  justify-self: end;
}

.armpi-ultra-page .chat-row--media-right .chat-avatar {
  grid-column: 3;
  align-self: flex-end;
}

.armpi-ultra-page .chat-bubble {
  width: fit-content;
  max-width: 100%;
  padding: 1rem 2.5rem;
  border-radius: 1.5rem;
  font-size: 1rem;
  line-height: 1.6;
}

.armpi-ultra-page .chat-bubble--blue {
  background: #28aafa;
  border-radius: 0 1.5rem 1.5rem 1.5rem;
}

.armpi-ultra-page .chat-bubble--orange {
  background: #ff9917;
  border-radius: 1.5rem 1.5rem 0 1.5rem;
}

.armpi-ultra-page .chat-bubble--white {
  background: var(--light);
  color: #30343a;
  border-radius: 1.5rem 1.5rem 0 1.5rem;
}

.armpi-ultra-page .chat-preview {
  width: 100%;
  border-radius: .5rem;
}

.armpi-ultra-page .ai-model__visual {
  position: relative;
  min-width: 0;
  overflow: hidden;
}

.armpi-ultra-page .ai-model__visual>img:first-child {
  display: block;
  width: 100%;
  height: 60.5rem;
  object-fit: contain;
}

.armpi-ultra-page .ai-model--openclaw .chat-row--left {
  margin-top: 4rem;
}

.armpi-ultra-page .ai-model--openclaw .chat-bubble {
  font-size: 1rem;
  line-height: 1.55;
}

.armpi-ultra-page .ai-model--openclaw .chat-bubble--orange {
  border-radius: 1.25rem 1.25rem 0 1.25rem;
}

.armpi-ultra-page .ai-model--openclaw .chat-bubble--white {
  padding: 1.25rem 1.5rem;
  font-weight: 500;
}

.armpi-ultra-page .chat-avatar--openclaw {
  background: var(--light);
  color: var(--text);
}

@media (max-width: 1600px) {
  .armpi-ultra-page .chat-row--left {
    margin-top: 3rem;
  }

  .armpi-ultra-page .chat-row--right,
  .armpi-ultra-page .chat-preview-row {
    margin-top: 1rem;
  }

  .armpi-ultra-page .ai-model--openclaw .chat-row--left {
    margin-top: 1rem;
  }

  .armpi-ultra-page .ai-model--openclaw .chat-bubble--white {
    padding: 1rem 1.25rem;
  }

  .armpi-ultra-page .ai-model--openclaw .chat-bubble {
    font-size: .8333rem;
  }
}

@media (max-width: 900px) {
  .armpi-ultra-page .feature-mosaic__row {
    flex-direction: column;
  }

  .armpi-ultra-page .mosaic-card {
    flex: 0 0 auto;
    width: 100%;
  }

  .armpi-ultra-page .ai-model {
    grid-template-columns: 1fr;
    gap: 2rem;
    width: 100%;
    min-height: 0;
    padding: 6rem 1rem;
  }

  .armpi-ultra-page .ai-model__visual>img:first-child {
    height: auto;
  }

  .armpi-ultra-page .chat-row,
  .armpi-ultra-page .chat-preview-row {
    grid-template-columns: 2.875rem minmax(0, 1fr) 2.875rem;
    width: 100%;
  }

  .armpi-ultra-page .chat-bubble {
    width: fit-content;
    max-width: 100%;
  }
}

/* Scroll-driven hard-craft frame sequence. */
.arm-craft-section {
  position: relative;
  height: auto;
  overflow: visible;
  background: var(--black);
}

.arm-craft-stage {
  position: relative;
  top: auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
  height: calc(100vh - var(--header-offset));
  min-height: 560px;
  overflow: hidden;
  background: #000000;
}

.arm-craft-stage .section-heading {
  position: relative;
  z-index: 4;
}

.arm-craft-media {
  position: relative;
  width: calc(var(--safe-width) * 1.2);
  margin: 0rem auto 0;
}

.arm-craft-frame-image {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
  opacity: 0;
  transition: opacity .4s ease;
  will-change: opacity;
}

.arm-craft-frame-image[aria-hidden="true"] {
  position: absolute;
  inset: 0;
  height: 100%;
}

.arm-craft-frame-image.is-active {
  opacity: 1;
}

.arm-craft-callout-layer {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}

.arm-craft-callout {
  position: absolute;
  display: flex;
  align-items: center;
  width: auto;
  color: var(--light);
  opacity: 0;
  visibility: hidden;
  will-change: opacity, transform;
}

.arm-craft-callout--left {
  left: 0;
  justify-content: flex-end;
  text-align: right;
}

.arm-craft-callout--right {
  right: 0;
  justify-content: flex-start;
  text-align: left;
}

.arm-craft-callout__text {
  flex: 0 0 auto;
  color: rgba(255, 255, 255, .92);
  font-size: clamp(.8rem, .94vw, 1.12rem);
  line-height: 1.35;
  white-space: nowrap;
  will-change: opacity, transform;
}

.arm-craft-callout__line {
  position: relative;
  flex: 1 1 auto;
  width: auto;
  min-width: 0;
  margin: 0 .8rem;
  border-top: 1px dashed rgba(255, 255, 255, .68);
  transform: scaleX(0);
  will-change: transform;
}

.arm-craft-callout__dot {
  position: absolute;
  top: 50%;
  display: block;
  width: .55rem;
  height: .55rem;
  border: 1px solid rgba(255, 192, 91, .9);
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 .35rem rgba(238, 149, 48, .16), 0 0 1rem rgba(238, 149, 48, .48);
  opacity: 0;
  transform: translateY(-50%);
}

.arm-craft-callout--left .arm-craft-callout__line {
  margin-right: 0;
  transform-origin: right center;
}

.arm-craft-callout--left .arm-craft-callout__dot {
  left: -.25rem;
}

.arm-craft-callout--right .arm-craft-callout__line {
  margin-left: 0;
  transform-origin: left center;
}

.arm-craft-callout--right .arm-craft-callout__dot {
  right: -.25rem;
}

.arm-craft-callout--depth {
  top: 27%;
  left: 44%;
  right: 7%;
}

.arm-craft-callout--claw {
  top: 38%;
  left: 9%;
  right: 63%;
}

.arm-craft-callout--servo-hx06l {
  top: 31%;
  left: 8%;
  right: 52%;
}

.arm-craft-callout--anti-stall-servo {
  top: 45%;
  left: 8%;
  right: 57%;
}

.arm-craft-callout--servo-hts16l {
  top: 42%;
  left: 5%;
  right: 56%;
}

.arm-craft-callout--torque-25kg {
  top: 45%;
  left: 5%;
  right: 52%;
}

.arm-craft-callout--servo-lx15d {
  top: 41%;
  left: 52%;
  right: 8%;
}

.arm-craft-callout--torque-17kg {
  top: 41%;
  left: 52%;
  right: 3%;
}

.arm-craft-callout--servo-lx15d-secondary {
  top: 30%;
  left: 48%;
  right: 18%;
}

.arm-craft-callout--servo-lx15d-secondary::after {
  content: "";
  position: absolute;
  top: .15rem;
  left: 46%;
  width: 32%;
  height: 0;
  border-top: 1px dashed rgba(255, 255, 255, .68);
  transform: rotate(35deg);
  transform-origin: left center;
}

.arm-craft-callout--servo-lx15d-secondary .arm-craft-callout__dot {
  opacity: 0 !important;
}

.arm-craft-callout--servo-lx225 {
  top: 63%;
  left: 9%;
  right: 56%;
}

.arm-craft-callout--servo-hts25l {
  top: 76%;
  left: 8%;
  right: 52%;
}

.arm-craft-callout--hts-25l {
  top: 76%;
  left: 8%;
  right: 57%;
}

.arm-craft-callout--alloy {
  top: 57%;
  left: 8%;
  right: 58%;
}

.arm-craft-callout--voice {
  top: 63%;
  left: 60%;
  right: 8%;
}

.arm-craft-callout--raspberry {
  top: 76%;
  left: 61%;
  right: 8%;
}

.arm-craft-callout--stm32 {
  top: 72%;
  left: 61%;
  right: 8%;
}

.arm-craft-section.is-static {
  height: auto;
}

.arm-craft-section.is-static .arm-craft-stage {
  position: relative;
  top: auto;
}

/* Modular video layout: one wide row followed by two columns. */
.modular-video-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  width: var(--safe-width);
  margin: 4rem auto 0;
}

.modular-video-grid__row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.modular-video-card {
  position: relative;
  overflow: hidden;
  min-width: 0;
  padding: 0;
  border: 0;
  border-radius: .5rem;
  background: #141414;
  color: inherit;
  cursor: pointer;
  text-align: left;
  transition: filter .25s ease;
}

/* First card always spans full width — keep the layout static */
.modular-video-card:first-child {
  grid-column: 1 / -1;
}

.modular-video-card::after {
  content: "";
  position: absolute;
  z-index: 1;
  inset: 0;
  background: rgba(0, 0, 0, .3);
  opacity: 1;
  pointer-events: none;
  transition: opacity .25s ease;
}

.modular-video-card.is-active::after {
  opacity: 0;
}

.modular-video-card video {
  display: block;
  width: 100%;
  height: auto;
}

.modular-video-card__label {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  z-index: 3;
  padding: .45rem .75rem;
  border-radius: .25rem;
  background: rgba(0, 0, 0, .56);
  color: var(--light);
  font-size: .9rem;
  line-height: 1;
}

.modular-video-card__play {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 3;
  width: 3.25rem;
  height: 3.25rem;
  border: 1px solid rgba(255, 255, 255, .78);
  border-radius: 50%;
  background: rgba(0, 0, 0, .3);
  opacity: 1;
  pointer-events: none;
  transform: translate(-50%, -50%);
  transition: opacity .25s ease;
}

.modular-video-card__play::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 54%;
  width: 0;
  height: 0;
  border-top: .52rem solid transparent;
  border-bottom: .52rem solid transparent;
  border-left: .78rem solid var(--light);
  transform: translate(-50%, -50%);
}

.modular-video-card.is-active .modular-video-card__play {
  opacity: 0;
}

.modular-video-card:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

#algorithms .carousel-slide {
  background: #111;
}

@media (max-width: 1600px) {
  .hero h1 {
    font-size: 72px;
  }

  .hero p {
    font-size: 22px;
  }

  .hero__content {
    top: 10%;
  }

  .intro__scroll-copy {
    top: -37vh;
  }

  .arm-craft-callout--servo-lx15d-secondary::after {
    width: 9rem;
  }

  .feature-mosaic {
    padding: 12vh 0 12vh;
  }

  .arm-craft-media {
    width: calc(var(--safe-width) * .8);
  }

  #depth-kinematics .section-heading {
    width: calc(var(--safe-width) * .7);
  }

  #ros-control .section-heading {
    width: calc(var(--safe-width) * .7);
  }

  #embodied-ai .section-heading {
    width: calc(var(--safe-width) * .7);
  }

  .static-video-section__media {
    width: calc(var(--safe-width) * .7);
  }

  #modular .section-heading {
    width: calc(var(--safe-width) * .7);
  }

  #modular .modular-video-grid {
    width: calc(var(--safe-width) * .7);
  }

  .fade-feature--3d .fade-feature__slide {
    left: 22.5%;
    width: 55%;
  }

  .fade-feature__stage {
    width: calc(var(--safe-width) * .8);
    margin: 0rem auto 0;
  }

  .fade-feature--3d .fade-feature__stage {
    aspect-ratio: 1800 / 713;
  }
}

@media (max-width: 900px) {
  .arm-craft-section {
    height: auto;
  }

  .arm-craft-stage {
    position: relative;
    top: auto;
    height: auto;
    min-height: 0;
    padding: 6rem 0;
    overflow: hidden;
  }

  .arm-craft-media {
    margin-top: 2.5rem;
  }

  .arm-craft-media>img {
    height: auto;
  }

  .arm-craft-callout-layer {
    position: relative;
    inset: auto;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .65rem;
    margin-top: 1.5rem;
  }

  .arm-craft-callout,
  .arm-craft-callout--left,
  .arm-craft-callout--right {
    position: relative;
    top: auto;
    right: auto;
    left: auto;
    justify-content: center;
    width: auto;
    min-height: 2.75rem;
    padding: .6rem;
    border-radius: .35rem;
    background: var(--panel);
    text-align: center;
    opacity: 1;
    visibility: visible;
  }

  .arm-craft-callout__line {
    display: none;
  }

  .arm-craft-callout__text {
    font-size: .72rem;
    white-space: normal;
  }

  .modular-video-grid {
    grid-template-columns: 1fr;
    margin-top: 2.5rem;
  }

  .modular-video-grid__row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .fade-feature--3d .fade-feature__slide {
    left: 11%;
    width: 78%;
  }
}