@font-face {
  font-family: "Noto Sans";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("../fonts/noto-sans-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212,
    U+2215, U+FEFF, U+FFFD;
}

:root {
  --text: #24242b;
  --muted: #686875;
  --link: #6650df;
  --accent: #7048f2;
  --accent-dark: #5440c8;
  --accent-blue: #1f7ff2;
  --accent-coral: #ef7a72;
  --brand-gradient: linear-gradient(90deg, #1f7ff2 0%, #7048f2 55%, #ef7a72 100%);
  --border: #dfdeeb;
  --soft: #f8f8fb;
  --soft-accent: #f5f3fc;
  --white: #ffffff;
  --container: 1120px;
  --container-wide: 1344px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family: "Noto Sans", Arial, Helvetica, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); }
button, a { -webkit-tap-highlight-color: transparent; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 8px 12px;
  color: #ffffff;
  background: #222222;
  border-radius: 4px;
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.container {
  width: min(calc(100% - 40px), var(--container));
  margin-inline: auto;
}

.container--wide {
  width: min(calc(100% - 40px), var(--container-wide));
}

.hero {
  background: linear-gradient(120deg, #f4f9ff 0%, #f7f4ff 54%, #fff6f3 100%);
}

.hero__inner {
  padding-block: 76px 30px;
  text-align: center;
}

.hero h1 {
  max-width: 1280px;
  margin: 0 auto;
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(2.15rem, 3.6vw, 3.1rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.16;
}

.title-line { display: block; }
.hero h1 .title-mark {
  color: transparent;
  background: var(--brand-gradient);
  background-clip: text;
  font-weight: 700;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.author-block {
  max-width: 1100px;
  margin: 26px auto 0;
}

.authors {
  max-width: 960px;
  margin-inline: auto;
  color: #209cee;
  font-size: 1.2rem;
  font-weight: 400;
  line-height: 1.65;
}

.author-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0 0.38em;
  margin: 0;
}

.author {
  display: inline-block;
  white-space: nowrap;
}

.author-block sup {
  position: relative;
  top: -0.18em;
  font-size: 0.64em;
  font-weight: 400;
  line-height: 0;
}

.authors sup { color: inherit; }

.affiliations {
  margin-top: 12px;
  color: #50505b;
  font-size: 1.07rem;
  font-weight: 400;
  line-height: 1.6;
}

.affiliations p { margin: 0; }

.affiliations sup {
  color: inherit;
  font-size: 0.68em;
}

.affiliation-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0 20px;
}

.affiliation-row span {
  display: inline-block;
  white-space: nowrap;
}

.institution-logos {
  display: grid;
  justify-items: center;
  gap: 16px;
  margin: 26px auto 0;
}

.institution-logo-row {
  display: flex;
  align-items: center;
  justify-content: center;
}

.institution-logo-row--primary { gap: 32px; }

.institution-logo-row--secondary { gap: 24px; }

.institution-logo {
  display: block;
  height: auto;
  mix-blend-mode: multiply;
}

.institution-logo--ustc { width: 300px; }

.institution-logo--chem-lab { width: 180px; }

.institution-logo--beihang { width: 280px; }

.institution-logo--zgca { width: 230px; }

.institution-logo--spinx { width: 260px; }

.hero__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 20px;
  border: 1px solid #363636;
  border-radius: 999px;
  font-size: 1.1rem;
  font-weight: 400;
  text-decoration: none;
  transition: background-color 150ms ease, border-color 150ms ease, transform 150ms ease;
}

.button--resource {
  color: #ffffff;
  background: #363636;
}

.button__icon {
  display: inline-grid;
  width: 1.05rem;
  place-items: center;
}

.robot-arm-icon {
  position: relative;
  display: block;
  width: 19px;
  height: 19px;
}

.robot-arm-icon::before {
  position: absolute;
  bottom: 1px;
  left: 1px;
  width: 8px;
  height: 3px;
  background: currentColor;
  border-radius: 2px 2px 1px 1px;
  content: "";
}

.robot-arm-icon::after {
  position: absolute;
  bottom: 5px;
  left: 5px;
  width: 9px;
  height: 3px;
  background: currentColor;
  border-radius: 999px;
  content: "";
  transform: rotate(-55deg);
  transform-origin: left center;
}

.robot-arm-icon > span {
  position: absolute;
  top: 3px;
  left: 10px;
  width: 7px;
  height: 3px;
  background: currentColor;
  border-radius: 999px;
  transform: rotate(28deg);
  transform-origin: left center;
}

.robot-arm-icon > span::before {
  position: absolute;
  top: -1px;
  left: -2px;
  width: 5px;
  height: 5px;
  background: currentColor;
  border: 1px solid #363636;
  border-radius: 50%;
  box-shadow: -6px 9px 0 -1px currentColor;
  content: "";
}

.robot-arm-icon > span::after {
  position: absolute;
  top: -1px;
  right: -3px;
  width: 5px;
  height: 6px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
  content: "";
  transform: rotate(20deg);
}

.button:hover {
  color: #ffffff;
  background: #4a4a4a;
  border-color: #4a4a4a;
  transform: translateY(-1px);
}

.button:focus-visible,
.carousel__button:focus-visible,
.carousel__viewport:focus-visible,
.figure-carousel__arrow:focus-visible,
.figure-carousel__viewport:focus-visible,
.figure-carousel__navigation button:focus-visible {
  outline: 3px solid rgba(112, 72, 242, 0.3);
  outline-offset: 3px;
}

.showcase,
.video-section,
.paper-section,
.overview { padding-block: 28px 32px; }

.showcase,
.video-section--tinted { background: var(--soft-accent); }

.overview { background: var(--white); }

.showcase {
  background: linear-gradient(180deg, #f5f3fc 0%, #faf9fc 100%);
}

.platform-note {
  display: flex;
  width: min(100%, 1120px);
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 0 auto 34px;
  padding: 11px 18px;
  color: #33313a;
  background:
    linear-gradient(#ffffff, #ffffff) padding-box,
    linear-gradient(90deg, #ef7a72 0%, #7048f2 45%, #1f7ff2 100%) border-box;
  border: 2px solid transparent;
  border-radius: 14px;
  box-shadow: 0 6px 18px rgba(70, 55, 135, 0.07);
}

.platform-note__title {
  flex: 0 0 auto;
  color: #e45f69;
  font-size: 1.0625rem;
  font-weight: 900;
  line-height: 1.3;
}

.platform-note__text {
  margin: 0;
  color: #36343d;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.5;
}

.platform-note__fullscreen { color: #6849d2; }

.platform-note__ubuntu { color: #d9582b; }

.platform-note__windows { color: #1676c4; }

.video-section,
.paper-section { background: var(--white); }

.section-heading {
  margin-bottom: 24px;
  text-align: center;
}

.section-heading h2,
.paper-heading h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.35rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.section-heading h2::after,
.paper-heading h2::after {
  display: block;
  width: 42px;
  height: 3px;
  margin: 14px auto 0;
  background: var(--brand-gradient);
  border-radius: 999px;
  content: "";
}

.carousel { position: relative; }

.carousel__viewport {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 6px 4px 16px;
  scrollbar-width: none;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
}

.carousel__viewport::-webkit-scrollbar { display: none; }

.carousel__viewport--resetting {
  scroll-behavior: auto !important;
  scroll-snap-type: none;
}

.carousel__track {
  --slides-visible: 3;
  --slide-gap: 18px;
  --slide-basis: calc((100% - 36px) / 3);
  display: flex;
  gap: var(--slide-gap);
}

.carousel__slide {
  flex: 0 0 var(--slide-basis);
  min-width: 0;
  margin: 0;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 5px 16px rgba(70, 55, 135, 0.08);
  scroll-snap-align: start;
}

.carousel__slide video,
.video-card video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  object-position: center;
  background: #000000;
}

.carousel__slide video {
  border: 0;
  border-radius: 0;
}

.carousel__slide p {
  display: grid;
  min-height: 46px;
  margin: 0;
  padding: 8px 12px;
  color: #333333;
  border-top: 1px solid var(--border);
  font-size: 1.04rem;
  font-weight: 600;
  line-height: 1.35;
  place-items: center;
  text-align: center;
}

.carousel__button {
  position: absolute;
  z-index: 3;
  top: calc(50% - 24px);
  display: grid;
  width: 42px;
  height: 42px;
  padding: 0;
  color: #5b5870;
  background: rgba(255, 255, 255, 0.94);
  border: 0;
  border-radius: 50%;
  cursor: pointer;
  place-items: center;
  transform: translateY(-50%);
  box-shadow: 0 5px 16px rgba(65, 53, 112, 0.18);
  font-size: 0.9rem;
  transition: color 150ms ease, transform 150ms ease, box-shadow 150ms ease;
}

.carousel__button:hover {
  color: #ffffff;
  background: var(--brand-gradient);
  box-shadow: 0 7px 20px rgba(102, 76, 205, 0.28);
  transform: translateY(-50%) scale(1.05);
}

.carousel__button--previous { left: -18px; }
.carousel__button--next { right: -18px; }

.carousel__status {
  margin: 0;
  color: #888888;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  text-align: right;
  text-transform: uppercase;
}

.task-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 20px;
  margin: -2px auto 24px;
  color: #5d5c69;
  font-size: 0.96rem;
}

.task-legend__item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.task-legend__swatch {
  width: 13px;
  height: 13px;
  background: var(--category-color);
  border-radius: 50%;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--category-color) 16%, transparent);
}

.category-rich { --category-color: #2f80ed; }
.category-light { --category-color: #ef7a72; }
.category-free { --category-color: #7a55e7; }
.category-bimanual { --category-color: #37a77a; }

.video-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px 18px;
}

.video-card {
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 0;
  box-shadow: 0 5px 16px rgba(70, 55, 135, 0.07);
  transition: border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
}

.video-card:hover {
  border-color: #c5c2d7;
  box-shadow: 0 8px 22px rgba(70, 55, 135, 0.12);
  transform: translateY(-2px);
}

.video-card__caption {
  display: flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  border-top: 1px solid #eeeeee;
  text-align: center;
}

.video-card__caption h3 {
  margin: 0;
  font-size: 1.04rem;
  font-weight: 600;
  line-height: 1.35;
}

.video-card__caption h3::before {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 9px;
  background: var(--category-color);
  border-radius: 50%;
  content: "";
  vertical-align: 0.08em;
}

.paper-heading {
  margin-bottom: 24px;
  text-align: center;
}

.text-container {
  width: min(calc(100% - 40px), 900px);
}

.abstract-copy p {
  margin: 0 0 0.35em;
  color: #333333;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.12rem;
  line-height: 1.72;
  text-align: justify;
}

.abstract-copy p:last-child { margin-bottom: 0; }

.abstract-copy {
  position: relative;
  overflow: hidden;
  padding: 28px 30px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 5px 18px rgba(70, 55, 135, 0.06);
}

.abstract-copy::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 4px;
  background: linear-gradient(180deg, #1f7ff2 0%, #7048f2 55%, #ef7a72 100%);
  content: "";
}

.figure-carousel {
  position: relative;
  width: 85%;
  margin: 0 auto;
}

.figure-carousel__stage { position: relative; }

.figure-carousel__viewport {
  overflow-x: auto;
  overflow-y: hidden;
  border: 1px solid var(--border);
  background: #ffffff;
  box-shadow: 0 6px 20px rgba(70, 55, 135, 0.08);
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
}

.figure-carousel__viewport::-webkit-scrollbar { display: none; }

.figure-carousel__track {
  display: flex;
  align-items: flex-start;
}

.figure-carousel__slide {
  flex: 0 0 100%;
  min-width: 0;
  margin: 0;
  scroll-snap-align: start;
}

.figure-carousel__media {
  display: grid;
  aspect-ratio: 2134 / 1200;
  padding: 6px;
  background: #ffffff;
  place-items: center;
}

.figure-carousel__slide img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

.figure-carousel--adaptive .figure-carousel__viewport {
  transition: height 180ms ease;
}

.figure-carousel--adaptive .figure-carousel__media { aspect-ratio: auto; }

.figure-carousel--adaptive .figure-carousel__slide img { height: auto; }

.figure-carousel__slide--compact img {
  width: 75%;
  margin-inline: auto;
}

.figure-carousel__slide figcaption {
  max-width: 1040px;
  min-height: 48px;
  margin: 0 auto;
  padding: 12px 20px;
  color: #555555;
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
  line-height: 1.5;
  text-align: center;
}

.figure-carousel__slide figcaption strong { color: var(--text); }

.figure-carousel__arrow {
  position: absolute;
  z-index: 3;
  top: 50%;
  display: grid;
  width: 42px;
  height: 42px;
  padding: 0;
  color: #5b5870;
  background: rgba(255, 255, 255, 0.94);
  border: 0;
  border-radius: 50%;
  cursor: pointer;
  place-items: center;
  box-shadow: 0 5px 16px rgba(65, 53, 112, 0.18);
  transform: translateY(-50%);
  transition: color 150ms ease, background 150ms ease, opacity 150ms ease;
}

.figure-carousel__arrow--previous { left: -21px; }

.figure-carousel__arrow--next { right: -21px; }

.figure-carousel__arrow:hover:not(:disabled) {
  color: #ffffff;
  background: #7048f2;
}

.figure-carousel__arrow:disabled {
  cursor: default;
  opacity: 0.32;
}

.figure-carousel__navigation {
  display: flex;
  width: fit-content;
  max-width: 100%;
  margin: 0 auto 12px;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.figure-carousel__navigation button {
  min-height: 36px;
  padding: 6px 12px;
  color: #3f3d48;
  background: #ffffff;
  border: 1px solid #d4d1df;
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
  font-size: 0.96rem;
  font-weight: 400;
  line-height: 1.2;
  box-shadow: 0 2px 6px rgba(45, 42, 60, 0.08);
  transition: color 150ms ease, background 150ms ease, border-color 150ms ease, box-shadow 150ms ease;
}

.figure-carousel__navigation button:not([aria-selected="true"]):hover {
  color: #5440a8;
  background: #f7f6fb;
  border-color: #8e84ba;
  box-shadow: 0 3px 8px rgba(45, 42, 60, 0.11);
}

.figure-carousel__navigation button[aria-selected="true"] {
  color: #ffffff;
  background: #6553b8;
  border-color: #6553b8;
  box-shadow: 0 3px 8px rgba(76, 59, 153, 0.18);
}

.figure-carousel__status {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.site-footer {
  padding: 48px 24px 96px;
  color: #4a4a4a;
  background: #fafafa;
}

.site-footer__inner { text-align: center; }

.site-footer p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.5;
}

.site-footer a {
  color: #3273dc;
  text-decoration: none;
}

.site-footer a:hover { color: #363636; }

/* Keep the complete 16:9 frame visible in the native fullscreen player. */
video:fullscreen,
video:-webkit-full-screen {
  width: 100vw !important;
  height: 100vh !important;
  max-width: none !important;
  max-height: none !important;
  aspect-ratio: auto !important;
  object-fit: contain !important;
  object-position: center !important;
  background: #000000 !important;
}

@media (max-width: 820px) {
  .title-line { display: inline; }

  .figure-carousel { width: 100%; }

  .task-legend { gap: 8px 14px; }

  .carousel__track {
    --slides-visible: 2;
    --slide-basis: calc((100% - 16px) / 2);
  }

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

@media (max-width: 560px) {
  .container,
  .container--wide,
  .text-container {
    width: min(calc(100% - 28px), var(--container));
  }

  .hero__inner { padding-block: 54px 48px; }

  .hero h1 { font-size: clamp(2rem, 10vw, 2.8rem); }

  .author-block { margin-top: 24px; }

  .authors {
    font-size: 1.06rem;
    line-height: 1.7;
  }

  .affiliations {
    margin-top: 11px;
    font-size: 0.98rem;
    line-height: 1.55;
  }

  .affiliation-row {
    align-items: center;
    flex-direction: column;
    gap: 2px;
  }

  .institution-logos {
    gap: 14px;
    margin-top: 22px;
  }

  .institution-logo-row {
    width: 100%;
    flex-wrap: wrap;
  }

  .institution-logo-row--primary { gap: 14px; }

  .institution-logo-row--secondary { gap: 14px 12px; }

  .institution-logo--ustc { width: min(66%, 250px); }

  .institution-logo--chem-lab { width: min(42%, 160px); }

  .institution-logo--beihang { width: min(58%, 215px); }

  .institution-logo--zgca { width: min(40%, 150px); }

  .institution-logo--spinx { width: min(48%, 180px); }

  .showcase,
  .video-section,
  .paper-section,
  .overview { padding-block: 24px 28px; }

  .platform-note {
    display: flex;
    width: 100%;
    align-items: flex-start;
    flex-direction: column;
    gap: 2px;
    padding: 11px 15px 13px;
    border-radius: 16px;
  }

  .platform-note__text { font-size: 0.96rem; }

  .carousel__track {
    --slides-visible: 1;
    --slide-gap: 12px;
    --slide-basis: 100%;
  }

  .carousel__button {
    top: auto;
    bottom: -4px;
    transform: none;
  }

  .carousel__button:hover { transform: scale(1.05); }

  .carousel__button--previous { left: 0; }

  .carousel__button--next {
    right: auto;
    left: 48px;
  }

  .carousel__status {
    min-height: 40px;
    padding-top: 10px;
  }

  .video-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .abstract-copy p,
  .figure-carousel__slide figcaption {
    font-size: 1.04rem;
    line-height: 1.7;
    text-align: left;
  }

  .figure-carousel__arrow--previous { left: 8px; }

  .figure-carousel__arrow--next { right: 8px; }

}

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

  *,
  *::before,
  *::after { transition-duration: 0.01ms !important; }
}