.icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  display: inline-block;
  vertical-align: middle;
}
[data-icon] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.icon-slot {
  flex-shrink: 0;
}
.button {
  border-radius: 15px;
  gap: 12px;
  transition:
    transform 0.3s var(--ease-out),
    background 0.3s,
    box-shadow 0.3s;
}
.button.primary {
  box-shadow:
    0 5px 0 -2px #12547b26,
    0 10px 25px -12px #1575b86b,
    inset 0 1px 0 #ffffff35;
}
.button.primary:hover {
  box-shadow:
    0 8px 0 -5px #12547b26,
    0 16px 30px -12px #1575b87a,
    inset 0 1px 0 #ffffff50;
}
.button .icon,
.nav-download .icon,
.text-link .icon {
  transition: transform 0.35s var(--ease-out);
}
.button:hover .icon,
.nav-download:hover .icon,
.text-link:hover .icon {
  transform: translateX(3px);
}
.button [data-icon='download'] .icon {
  padding: 2px;
}
.button:hover [data-icon='download'] .icon {
  transform: translateY(3px);
}
.nav-download .icon {
  width: 18px;
  height: 18px;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.text-link .icon {
  width: 17px;
  height: 17px;
}
.quiet-note {
  letter-spacing: 0.3px;
}
.hero .lead {
  max-width: 580px;
  font-family: 'APB Hero Lead', 'Kaiti SC', 'STKaiti', KaiTi, serif;
  font-size: 20px;
  font-weight: 300;
  letter-spacing: 0.02em;
}
.float-note [data-icon] {
  width: 25px;
}
.questions summary .icon {
  width: 19px;
  height: 19px;
}
.privacy-icon .icon {
  width: 42px;
  height: 42px;
}
.platform-pill {
  display: inline-flex;
  gap: 8px;
  align-items: center;
}
.platform-pill .icon {
  width: 18px;
  height: 18px;
}

/* 背景光层不拦截操作或遮住正文 */
.light-surface {
  position: relative;
  isolation: isolate;
}
.section-light {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
  opacity: 0.5;
  transition: opacity 0.7s;
  background: radial-gradient(
    500px circle at var(--light-x, 65%) var(--light-y, 30%),
    #6fbefc1f,
    transparent 70%
  );
}
.light-surface:hover > .section-light {
  opacity: 1;
}
.light-surface > .section-light::after {
  content: '';
  position: absolute;
  width: 65%;
  height: 70%;
  left: 20%;
  top: 10%;
  background: radial-gradient(ellipse, #8dc9ff0e, transparent 65%);
  animation: ambient-light 14s ease-in-out infinite alternate;
}
@keyframes ambient-light {
  to {
    transform: translate(18%, 12%) scale(1.2);
  }
}

.demo-phone {
  padding: 26px 20px;
  gap: 16px;
  overflow: hidden;
}
.phone-label {
  letter-spacing: 0.3px;
  text-align: center;
}
.app-preview {
  position: relative;
  width: 100%;
  height: 374px;
  outline-offset: 4px;
  touch-action: pan-y;
  cursor: grab;
  user-select: none;
}
.preview-stack {
  position: absolute;
  inset: 0;
  perspective: 900px;
  transform: translateX(var(--drag-x, 0px));
  transition: transform 0.45s var(--ease-out);
}
.preview-card {
  position: absolute;
  width: 169px;
  top: 10px;
  left: calc(50% - 84.5px);
  margin: 0;
  border: 5px solid #fff;
  border-radius: 25px;
  overflow: hidden;
  background: #eff7fc;
  box-shadow: 0 18px 30px -15px #1d577552;
  opacity: 0;
  transform: translateX(40px) rotateY(-14deg) scale(0.84);
  transition:
    transform 0.65s var(--ease-out),
    opacity 0.5s,
    filter 0.6s;
  pointer-events: none;
}
.preview-card img {
  width: 100%;
  aspect-ratio: 1080 / 2400;
  object-fit: cover;
  object-position: top;
  pointer-events: none;
}
.preview-card.is-current {
  z-index: 3;
  opacity: 1;
  transform: translateX(0) rotateY(0) scale(1);
  filter: none;
}
.preview-card.is-next {
  z-index: 2;
  opacity: 0.5;
  transform: translateX(27px) translateY(10px) rotateY(-12deg) rotate(5deg) scale(0.9);
  filter: saturate(0.6);
}
.preview-card.is-previous {
  z-index: 1;
  opacity: 0.45;
  transform: translateX(-25px) translateY(10px) rotateY(12deg) rotate(-5deg) scale(0.9);
  filter: saturate(0.6);
}
.preview-meta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  text-align: center;
}
.preview-meta strong {
  font-size: 12px;
  font-weight: 550;
}
.preview-meta > span {
  color: var(--muted);
  font-size: 10px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 2px;
}
.preview-dots {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
}
.preview-dots button {
  position: relative;
  min-width: 24px;
  min-height: 32px;
  padding: 0;
  background: transparent;
}
.preview-dots button::after {
  content: '';
  position: absolute;
  width: 5px;
  height: 5px;
  border-radius: 9px;
  background: var(--muted);
  opacity: 0.35;
  inset: calc(50% - 2.5px) auto auto calc(50% - 2.5px);
  transition:
    width 0.35s,
    background 0.35s;
}
.preview-dots button[aria-pressed='true']::after {
  width: 16px;
  left: calc(50% - 8px);
  background: var(--blue);
  opacity: 1;
}
.phone-caption {
  text-align: center;
}

.scene-label-compact {
  display: none;
}
.feature-tabs {
  gap: 8px;
}
.feature-tabs button {
  padding: 11px 22px;
  transition:
    background 0.3s,
    color 0.3s,
    box-shadow 0.3s,
    transform 0.3s;
}
.feature-tabs button:hover {
  transform: translateY(-2px);
  color: var(--blue);
}
.feature-tabs [aria-selected='true'] {
  box-shadow: 0 6px 15px #1736521a;
}
.feature-tabs [aria-selected='true']:hover {
  color: var(--bg);
}
.feature-stage {
  position: relative;
}
.feature-panel {
  border: 1px solid color-mix(in srgb, var(--line) 55%, transparent);
  background: linear-gradient(
    115deg,
    var(--surface),
    color-mix(in srgb, var(--pale) 75%, var(--bg))
  );
  min-height: 620px;
  touch-action: pan-y;
  cursor: grab;
}
.feature-copy {
  padding: 52px 52px 52px 58px;
}
.feature-copy h3 {
  font-size: clamp(29px, 2.7vw, 37px);
  font-weight: 650;
  letter-spacing: -1.2px;
}
.feature-copy li::before {
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--blue) 8%, transparent);
  margin-left: 4px;
  margin-right: 15px;
}
.feature-visual {
  justify-content: center;
  padding: 75px 30px 32px;
  perspective: 1000px;
}
.feature-visual::before {
  width: 360px;
  height: 360px;
  top: 20%;
}
.feature-phone {
  width: 224px;
  margin: 0;
  border-radius: 29px;
  border-width: 6px;
  transform: rotate(4deg);
  box-shadow:
    20px 25px 55px -20px #3f73935e,
    3px 4px 0 #b4d3e55e;
}
.feature-phone img {
  aspect-ratio: 1080 / 2400;
  width: 100%;
  object-fit: cover;
  object-position: top;
}
.feature-copy,
.feature-visual {
  translate: var(--drag-x, 0px) 0;
  transition: translate 0.45s var(--ease-out);
}
.feature-visual:hover .feature-phone {
  transform: rotate(0) translateY(-5px);
}
.visual-caption {
  top: 25px;
  width: 78%;
}
.visual-caption > span:last-child {
  font-size: 28px;
}
.visual-sticker {
  bottom: 70px;
  left: 0;
  padding: 11px 17px;
  font-size: 12px;
  box-shadow: 0 12px 34px #326f9620;
}
.scene-arrow {
  position: absolute;
  top: 50%;
  z-index: 5;
  transform: translateY(-50%);
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 95%, transparent);
  box-shadow: 0 6px 16px #25466614;
  width: 50px;
  height: 50px;
  padding: 0;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--blue);
  transition:
    background 0.25s,
    box-shadow 0.25s,
    scale 0.25s;
}
.scene-prev {
  left: -25px;
}
.scene-next {
  right: -25px;
}
.scene-arrow:hover {
  background: var(--pale);
  box-shadow: 0 8px 24px #25466624;
  scale: 1.07;
}
.scene-arrow:active {
  scale: 0.95;
}
.scene-arrow .icon {
  stroke-width: 2.3;
  width: 21px;
  height: 21px;
}
.is-dragging {
  cursor: grabbing;
  user-select: none;
}
.is-dragging .preview-stack,
.is-dragging .feature-copy,
.is-dragging .feature-visual {
  transition: none;
}
.carousel-controls {
  justify-content: space-between;
  gap: 25px;
  padding-inline: 2px;
}
.carousel-controls #slide-count {
  letter-spacing: 2px;
  font-variant-numeric: tabular-nums;
}
.scene-progress {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.scene-progress i {
  display: block;
  height: 3px;
  width: 26px;
  border-radius: 5px;
  background: var(--line);
  transition:
    width 0.4s,
    background 0.4s;
}
.scene-progress i.active {
  background: var(--blue);
  width: 55px;
}
.swipe-note {
  font-size: 11px;
}
.learning-route {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
  margin: 60px auto 0;
  max-width: 860px;
}
.learning-route > div {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 0 12px;
  align-items: center;
}
.learning-route [data-icon] {
  grid-row: 1/3;
  color: var(--blue);
}
.learning-route .icon {
  width: 30px;
  height: 30px;
}
.learning-route strong {
  font-size: 15px;
  font-weight: 600;
}
.learning-route small {
  color: var(--muted);
  font-size: 11px;
}
.route-line {
  flex: 1;
  height: 1px;
  max-width: 70px;
  background: linear-gradient(90deg, var(--line), var(--blue), var(--line));
  opacity: 0.6;
}

/* 倾斜每帧只处理一次指针更新，圆环位于不同三维平面 */
.goal-demo {
  display: none;
  width: min(320px, 100%);
  background: linear-gradient(145deg, var(--panel), var(--surface));
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 26px;
  position: relative;
  box-shadow: 0 18px 40px -16px #3a759d38;
  transform: rotate(3deg);
}
[data-scene='3'] .feature-phone,
[data-scene='3'] .visual-sticker {
  display: none;
}
[data-scene='3'] .goal-demo {
  display: block;
}
.goal-demo-label {
  position: absolute;
  top: 17px;
  right: 18px;
  font-size: 9px;
  color: var(--muted);
}
.goal-medallion {
  width: 76px;
  height: 76px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, #fff3d9, #f2d791);
  border: 4px solid #ffeac0;
  border-radius: 24px;
  box-shadow:
    0 5px 0 #dbc389,
    0 13px 24px #aa87421c;
  color: #927035;
  margin: 12px auto 28px;
  position: relative;
  transform: rotate(-8deg);
}
.goal-medallion > span > .icon {
  width: 39px;
  height: 39px;
}
.goal-star {
  position: absolute;
  color: #c6a565;
}
.goal-star.star-a {
  top: -10px;
  right: -35px;
}
.goal-star.star-b {
  left: -25px;
  bottom: -10px;
}
.goal-medallion .goal-star .icon {
  width: 18px;
  height: 18px;
}
.goal-kicker {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--muted);
  text-align: center;
}
.goal-demo h4 {
  font-size: 22px;
  line-height: 1.5;
  text-align: center;
  margin: 10px 0 18px;
}
.goal-reward {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 11px;
  text-align: center;
  font-size: 11px;
  color: var(--blue);
  background: var(--pale);
}
.goal-reward .icon {
  width: 15px;
  height: 15px;
  margin-right: 7px;
}
.goal-demo-progress {
  margin-top: 23px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
}
.goal-demo-progress b {
  font-size: 24px;
  font-variant-numeric: tabular-nums;
}
.goal-demo-progress small {
  color: var(--muted);
  font-size: 10px;
}
#goal-progress {
  display: block;
  width: 100%;
  height: 38px;
  margin: 3px 0;
  accent-color: var(--blue);
  cursor: ew-resize;
}
#goal-reward-state {
  font-size: 11px;
  color: var(--blue);
}
.goal-help {
  color: var(--muted);
  font-size: 9px;
}
.goal-complete .goal-medallion {
  animation: reward-pop 0.7s var(--ease-out);
  box-shadow:
    0 5px 0 #dbc389,
    0 0 45px #e8c46965;
}
@keyframes reward-pop {
  50% {
    transform: rotate(8deg) scale(1.15);
  }
}
.ecosystem-section {
  overflow: hidden;
  padding-block: 85px 72px;
}
.orbit-stage {
  position: relative;
  perspective: 1100px;
  padding: 30px 0 42px;
}
.orbit-aura {
  position: absolute;
  inset: -30px 0;
  background: radial-gradient(
    ellipse at calc(50% + var(--orbit-x, 0px)) calc(50% + var(--orbit-y, 0px)),
    #92cffa33,
    transparent 65%
  );
  pointer-events: none;
}
.learning-orbit {
  height: 470px;
  transform-style: preserve-3d;
  transform: rotateX(var(--orbit-rx, 7deg)) rotateY(var(--orbit-ry, -5deg));
  transition: transform 0.9s var(--ease-out);
}
.learning-orbit::before,
.learning-orbit::after {
  display: none;
}
.orbital-ring {
  position: absolute;
  inset: 36px 90px;
  border: 1px solid #69a9d33d;
  border-radius: 50%;
  transform-style: preserve-3d;
  box-shadow:
    inset 0 0 20px #8bc4ed08,
    0 0 30px #8bc4ed0a;
  pointer-events: none;
}
.ring-one {
  transform: rotateX(58deg) rotateZ(-22deg);
  animation: ring-precess-one 28s ease-in-out infinite alternate;
}
.ring-two {
  inset: 28px 70px;
  transform: rotateX(-40deg) rotateY(18deg) rotateZ(22deg);
  animation: ring-precess-two 32s ease-in-out infinite alternate;
}
.ring-three {
  inset: 0 235px;
  transform: rotateY(58deg) rotateZ(-20deg);
  border-color: #89c1e32e;
}
.orbital-ring i {
  position: absolute;
  width: 11px;
  height: 11px;
  top: calc(50% - 5px);
  left: -5px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #c8f1ff, #5ba4d6 70%);
  box-shadow: 0 0 16px #6bb9ef75;
}
.ring-two i {
  left: auto;
  right: -6px;
  width: 15px;
  height: 15px;
}
.orbit-center {
  transform: translate(-50%, -50%) translateZ(80px);
  padding: 32px 26px;
  min-width: 172px;
  background: linear-gradient(130deg, var(--panel) 50%, var(--pale));
  border-color: color-mix(in srgb, var(--panel) 80%, var(--blue));
  box-shadow:
    0 4px 0 var(--line),
    0 10px 0 -3px color-mix(in srgb, var(--line) 60%, transparent),
    10px 30px 55px -16px #3d759344,
    inset 0 1px 0 #ffffff70;
  transform-style: preserve-3d;
}
.orbit-center img {
  transform: translateZ(18px);
  filter: drop-shadow(0 7px 8px #21679420);
}
.orbit-center strong {
  font-size: 20px;
}
.orbit-center::after {
  inset: -14px;
  border-radius: 38px;
  transform: translateZ(-12px);
}
.orbit-item {
  text-align: left;
  min-width: 202px;
  border-radius: 19px;
  padding: 17px 19px;
  gap: 1px 12px;
  grid-template-columns: 40px 1fr;
  background: linear-gradient(
    135deg,
    var(--panel),
    color-mix(in srgb, var(--panel) 87%, var(--pale))
  );
  box-shadow:
    0 3px 0 var(--line),
    8px 20px 35px -20px #31678038,
    inset 0 1px 0 #fff8;
  transform: translateZ(var(--depth, 20px));
  animation: satellite-drift 7s ease-in-out infinite alternate;
  transition:
    box-shadow 0.4s,
    border-color 0.4s;
}
.orbit-item:hover {
  border-color: var(--blue);
  box-shadow:
    0 3px 0 color-mix(in srgb, var(--line) 70%, var(--blue)),
    8px 24px 40px -15px #3167804d;
}
.orbit-item > .orbit-icon {
  grid-row: 1/3;
  display: grid;
  place-items: center;
  width: 40px;
  height: 43px;
  border-radius: 12px;
  background: var(--pale);
  animation: none;
}
.orbit-icon .icon {
  width: 24px;
  height: 24px;
}
.oi-1 {
  --depth: 35px;
  top: 0;
  left: 30%;
  animation-delay: -1s;
}
.oi-2 {
  --depth: 65px;
  right: -5px;
  top: 120px;
  animation-delay: -3s;
}
.oi-3 {
  --depth: 20px;
  right: 4%;
  bottom: 38px;
  animation-delay: -5s;
}
.oi-4 {
  --depth: 60px;
  left: 31%;
  bottom: 0;
  animation-delay: -2s;
}
.oi-5 {
  --depth: 25px;
  left: -10px;
  bottom: 75px;
  animation-delay: -4s;
}
.oi-6 {
  --depth: 50px;
  left: 0;
  top: 105px;
  animation-delay: -6s;
}
.knowledge-paths {
  transform: translateZ(-10px);
  opacity: 0.55;
}
.orbit-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
  margin: 18px 0 0;
}
.orbit-hint .icon {
  width: 17px;
  height: 17px;
}
@keyframes ring-precess-one {
  to {
    transform: rotateX(68deg) rotateY(8deg) rotateZ(13deg);
  }
}
@keyframes ring-precess-two {
  to {
    transform: rotateX(-55deg) rotateY(-12deg) rotateZ(-12deg);
  }
}
@keyframes satellite-drift {
  from {
    translate: 0 -5px;
  }
  to {
    translate: 0 7px;
  }
}
.download-card {
  border-color: color-mix(in srgb, var(--blue) 20%, var(--line));
  box-shadow: 0 20px 60px -20px #376d9726;
}
.questions details {
  transition: background 0.3s;
  border-radius: 8px;
}
.questions details[open] {
  background: color-mix(in srgb, var(--pale) 28%, transparent);
}
.questions summary {
  gap: 20px;
}
.questions summary > span {
  flex-shrink: 0;
}
.questions p {
  max-width: 65ch;
}
.faq-question {
  display: flex;
  align-items: baseline;
  gap: 20px;
}
.questions summary > .faq-question {
  flex-shrink: 1;
}
.faq-question small {
  color: var(--blue);
  font-size: 10px;
  letter-spacing: 1px;
  font-variant-numeric: tabular-nums;
}
.benefit-pagination {
  display: none;
}
.benefit-card {
  min-width: 0;
}
.plan-art {
  position: absolute;
  width: 62px;
  height: 62px;
  top: 27px;
  right: 24px;
  object-fit: contain;
  filter: drop-shadow(0 7px 10px #41675215);
  transition: transform 0.5s var(--ease-out);
}
.plan-art-basic {
  width: 43px;
  height: 43px;
  top: 36px;
  right: 32px;
}
.benefit-card:hover .plan-art {
  transform: translateY(-3px) rotate(-5deg);
}
.benefit-card .plan-label {
  max-width: calc(100% - 55px);
}
.benefit-card .plan-value {
  font-size: clamp(24px, 2.1vw, 30px);
}

@media (max-width: 960px) {
  .benefit-grid {
    display: flex;
    position: relative;
    gap: 18px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    overscroll-behavior-x: contain;
    scroll-padding-inline: 0;
    scrollbar-width: none;
    padding: 8px 2px 24px;
    margin-block: -8px 0;
    touch-action: pan-y pinch-zoom;
    cursor: grab;
    user-select: none;
    -webkit-user-select: none;
  }
  .benefit-grid.is-plan-dragging {
    scroll-snap-type: none;
    scroll-behavior: auto;
    cursor: grabbing;
  }
  .benefit-grid::-webkit-scrollbar {
    display: none;
  }
  .benefit-card {
    flex: 0 0 55%;
    scroll-snap-align: start;
    scroll-snap-stop: always;
    padding: 30px 27px;
    margin: 0;
  }
  .benefit-card:hover {
    translate: none;
  }
  .benefit-pagination {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    margin-top: 7px;
  }
  .benefit-pagination button {
    border: 1px solid var(--line);
    border-radius: 99px;
    padding: 10px 17px;
    min-height: 44px;
    color: var(--muted);
    background: var(--panel);
    font-size: 12px;
    transition:
      background 0.25s,
      color 0.25s;
  }
  .benefit-pagination button[aria-pressed='true'] {
    color: var(--bg);
    background: var(--ink);
    border-color: var(--ink);
  }
  .benefit-pagination > span {
    font-size: 11px;
    color: var(--muted);
    margin-left: auto;
  }
}

@media (prefers-color-scheme: dark) {
  .preview-card {
    border-color: #345165;
  }
  .section-light {
    background: radial-gradient(
      500px circle at var(--light-x, 65%) var(--light-y, 30%),
      #4b9bd71a,
      transparent 70%
    );
  }
  .orbit-item,
  .orbit-center {
    box-shadow:
      0 3px 0 #234258,
      8px 24px 40px -15px #0006,
      inset 0 1px 0 #ffffff0a;
  }
}
@media (max-width: 1100px) {
  .demo-phone {
    display: grid;
    grid-column: 1/-1;
    grid-template-columns: 215px minmax(0, 1fr);
    grid-template-rows: 1fr auto auto 1fr;
    justify-items: center;
    column-gap: 25px;
    padding: 25px 45px;
  }
  .demo-phone .app-preview {
    grid-column: 1;
    grid-row: 1/5;
    height: 347px;
  }
  .preview-card {
    width: 155px;
    left: calc(50% - 77.5px);
  }
  .phone-label {
    align-self: end;
  }
  .phone-caption {
    align-self: start;
  }
  .feature-copy {
    padding: 38px;
  }
  .feature-phone {
    width: 204px;
  }
  .feature-panel {
    min-height: 590px;
  }
  .orbit-item {
    min-width: 180px;
    padding: 14px;
  }
}
@media (max-width: 960px) and (min-width: 641px) {
  .feature-copy {
    padding: 35px 28px;
  }
  .feature-copy h3 {
    font-size: 29px;
  }
  .feature-copy > p:not(.eyebrow) {
    font-size: 14px;
  }
  .learning-orbit {
    width: 100%;
    transform: rotateX(var(--orbit-rx, 7deg)) rotateY(var(--orbit-ry, -5deg)) scale(0.92);
  }
  .orbit-item {
    min-width: 164px;
    grid-template-columns: 32px 1fr;
    gap: 5px;
  }
  .orbit-item > .orbit-icon {
    width: 30px;
    height: 36px;
  }
  .orbit-item strong {
    font-size: 12px;
  }
  .orbit-item small {
    font-size: 9px;
  }
}
@media (max-width: 640px) {
  .benefit-card {
    flex-basis: 90%;
    padding: 28px 24px;
  }
  .benefit-card .plan-value {
    font-size: 25px;
  }
  .benefit-card ul {
    font-size: 12px;
    margin-top: 20px;
    padding-top: 16px;
  }
  .benefit-card li {
    margin-block: 11px;
  }
  .benefit-pagination button {
    font-size: 11px;
    padding: 9px 14px;
  }
  .benefit-pagination > span {
    flex-basis: 100%;
    margin: 4px 0 0;
    font-size: 10px;
  }
  .benefit-note {
    text-align: left;
    line-height: 1.85;
    margin-top: 18px;
  }
  .faq-question {
    gap: 12px;
  }
  .questions summary {
    line-height: 1.8;
    padding-block: 20px;
  }
  .hero .lead {
    font-size: 16px;
  }
  .demo-phone {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 10px;
    padding: 24px 16px;
    border-top: 1px solid var(--line);
  }
  .demo-phone .app-preview {
    height: 286px;
  }
  .preview-card {
    width: 128px;
    left: calc(50% - 64px);
    border-width: 4px;
    border-radius: 21px;
  }
  .preview-card.is-next {
    transform: translateX(13px) translateY(7px) rotate(4deg) scale(0.92);
  }
  .preview-card.is-previous {
    transform: translateX(-11px) translateY(7px) rotate(-4deg) scale(0.92);
  }
  .phone-label {
    font-size: 12px;
  }
  .preview-meta strong {
    font-size: 11px;
  }
  .phone-caption {
    font-size: 10px;
  }
  .preview-dots {
    max-width: 112px;
  }
  .preview-dots button {
    min-width: 24px;
  }
  .feature-tabs {
    gap: 6px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-auto-rows: 1fr;
  }
  .feature-tabs button {
    min-width: 0;
    min-height: 56px;
    font-size: 0.875rem;
    line-height: 1.5;
    padding: 8px 3px;
    border-radius: 16px;
    overflow-wrap: anywhere;
  }
  .scene-label-full {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }
  .scene-label-compact {
    display: inline;
  }
  .scene-label-compact > span {
    display: block;
  }
  .feature-panel {
    min-height: 0;
  }
  .feature-copy {
    padding: 30px 25px 20px;
  }
  .feature-copy h3 {
    font-size: 28px;
    line-height: 1.4;
  }
  .feature-copy > p:not(.eyebrow) {
    font-size: 13px;
  }
  .feature-visual {
    height: 475px;
    padding: 50px 25px 20px;
  }
  [data-scene='3'] .feature-visual {
    height: auto;
    min-height: 530px;
    padding: 52px 25px 35px;
  }
  .goal-demo {
    padding: 22px;
    transform: rotate(1deg);
  }
  .goal-medallion {
    width: 64px;
    height: 64px;
    margin-bottom: 22px;
  }
  .feature-phone {
    width: 172px;
    margin: 0;
    border-radius: 25px;
  }
  .feature-visual::before {
    width: 270px;
    height: 270px;
  }
  .visual-caption {
    top: 8px;
  }
  .visual-sticker {
    left: 13px;
    bottom: 45px;
    font-size: 10px;
    padding: 9px 12px;
  }
  .scene-arrow {
    width: 42px;
    height: 42px;
    top: auto;
    bottom: 195px;
  }
  .scene-prev {
    left: -12px;
  }
  .scene-next {
    right: -12px;
  }
  .carousel-controls {
    gap: 12px;
    flex-wrap: wrap;
    font-size: 10px;
  }
  .scene-progress i {
    width: 17px;
  }
  .scene-progress i.active {
    width: 30px;
  }
  .swipe-note {
    font-size: 10px;
  }
  .learning-route {
    gap: 14px;
    margin-top: 36px;
    align-items: start;
  }
  .learning-route > div {
    display: flex;
    flex-direction: column;
    text-align: center;
    flex: 1;
    gap: 5px;
  }
  .learning-route .icon {
    width: 25px;
    height: 25px;
  }
  .learning-route strong {
    font-size: 13px;
    white-space: nowrap;
  }
  .learning-route small {
    font-size: 10px;
  }
  .route-line {
    display: none;
  }
  .ecosystem-section {
    padding-block: 50px;
  }
  .orbit-stage {
    padding: 10px 0 20px;
    perspective: none;
  }
  .learning-orbit {
    height: auto;
    transform: none;
    transform-style: flat;
    gap: 13px;
  }
  .orbital-ring {
    display: none;
  }
  .orbit-center {
    transform: none;
    min-width: 0;
    padding: 24px 20px;
    border-radius: 24px;
  }
  .orbit-center img {
    transform: none;
  }
  .orbit-item {
    transform: none;
    min-width: 0;
    grid-template-columns: 30px 1fr;
    padding: 15px 10px;
    gap: 3px 8px;
    border-radius: 15px;
    animation: none;
  }
  .orbit-item > .orbit-icon {
    width: 30px;
    height: 35px;
    border-radius: 9px;
  }
  .orbit-icon .icon {
    width: 19px;
    height: 19px;
  }
  .orbit-item strong {
    font-size: 12px;
  }
  .orbit-item small {
    font-size: 9px;
  }
  .orbit-hint {
    font-size: 10px;
    gap: 7px;
  }
  .section-light {
    background-size: 100% 100%;
  }
}
@media (max-width: 359px) {
  .demo-phone {
    grid-template-columns: 135px minmax(0, 1fr);
    padding-inline: 12px;
    gap: 5px;
  }
  .phone-label {
    font-size: 11px;
  }
  .preview-meta strong {
    font-size: 10px;
  }
  .carousel-controls .swipe-note {
    width: 100%;
    text-align: right;
  }
  .orbit-item {
    gap: 3px 5px;
    padding-inline: 8px;
  }
}
@media (hover: none) {
  .feature-visual:hover .feature-phone {
    transform: rotate(4deg);
  }
  .orbit-item:hover {
    translate: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  .learning-orbit {
    transform: none;
  }
  .section-light {
    opacity: 0.4;
  }
}

.scene-measure {
  position: fixed;
  left: -10000px;
  top: 0;
  visibility: hidden;
  pointer-events: none;
}
.scene-measure .feature-copy,
.scene-measure .feature-visual {
  min-height: 0 !important;
}
@media (max-width: 960px) {
  .feature-copy {
    min-height: var(--scene-copy-height, 0px);
  }
  .feature-visual {
    min-height: var(--scene-visual-height, 0px);
  }
}
.download-layout {
  grid-template-columns: minmax(250px, 0.8fr) minmax(0, 1.7fr);
  gap: clamp(24px, 3.4vw, 64px);
}
.download-options {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  align-items: stretch;
  border: 1px solid var(--line, #d3e3ef);
  border-radius: 28px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 20px 50px rgba(44, 96, 127, 0.06);
}
.download-options.single-option {
  grid-template-columns: 1fr;
}
.download-options .download-card {
  min-width: 0;
  width: auto;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  padding: clamp(22px, 2.2vw, 36px);
  background: transparent;
}
.download-options .mini-entry {
  border-left: 1px solid #d3e3ef;
  background: linear-gradient(150deg, rgba(235, 247, 242, 0.6), rgba(244, 250, 255, 0.6));
  display: flex;
  flex-direction: column;
}
.download-options .download-card-top {
  align-items: flex-start;
  gap: 12px;
}
.download-options .download-card h3 {
  font-size: 19px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}
.download-options .download-card-top img {
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
}
.download-options .download-intro,
#mini-description {
  font-size: 15px;
  line-height: 1.8;
}
.download-options .button {
  padding-inline: 12px;
  font-size: 15px;
}
.mini-qr-box {
  display: grid;
  place-items: center;
  flex: 1;
  padding-top: 16px;
  min-height: 260px;
}
.mini-qr-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: min(100%, 224px);
  min-height: 224px;
  padding: 24px 12px;
  gap: 12px;
  border: 1px dashed #abc5d3;
  border-radius: 20px;
  color: #536f80;
  text-align: center;
  background: rgba(255, 255, 255, 0.65);
}
.qr-placeholder-symbol {
  font-size: 44px;
  color: #608e8d;
  line-height: 1;
}
.mini-qr-placeholder small {
  font-size: 12px;
  line-height: 1.6;
}
.mini-qr-zoom {
  display: flex;
  align-items: center;
  flex-direction: column;
  gap: 14px;
  padding: 10px;
  border: 0;
  background: transparent;
  border-radius: 14px;
  color: #426173;
  cursor: zoom-in;
}
.mini-qr-zoom img {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: contain;
  background: white;
  border-radius: 10px;
}
.mini-qr-zoom span {
  font-size: 13px;
}
.mini-qr-zoom:focus-visible {
  outline: 3px solid #2673a0;
  outline-offset: 4px;
}
.download-options [hidden],
#mini-entry[hidden] {
  display: none !important;
}
.mini-qr-dialog {
  border: 1px solid #d3e3ef;
  border-radius: 24px;
  padding: 24px;
  width: min(92vw, 560px);
  max-height: 90dvh;
  color: #1b3445;
  background: #f8fcff;
}
.mini-qr-dialog::backdrop {
  background: rgba(17, 39, 51, 0.6);
  backdrop-filter: blur(5px);
}
.mini-qr-dialog-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}
.mini-qr-dialog-content h2 {
  font-size: 22px;
  margin: 0;
}
.mini-qr-dialog-content p {
  font-size: 14px;
  text-align: center;
  margin: 0;
}
.mini-qr-dialog-content img {
  max-width: 100%;
  height: auto;
  background: white;
}
#mini-qr-close {
  align-self: flex-end;
  border: 1px solid #bfd5e4;
  border-radius: 999px;
  background: white;
  color: #1b3445;
  padding: 9px 18px;
  cursor: pointer;
}
.hero-copy .lead,
#download-heading,
#download-description,
.download-intro,
#installation-note,
#mini-description,
#faq details > p {
  white-space: pre-line;
}
.faq-plus {
  font-size: 25px;
  color: #7992a6;
}
#faq details[open] .faq-plus {
  transform: rotate(45deg);
}
@media (max-width: 1100px) {
  .download-layout {
    grid-template-columns: minmax(0, 1fr);
  }
  .download-options {
    width: 100%;
  }
}
@media (max-width: 640px) {
  .download-options {
    grid-template-columns: minmax(0, 1fr);
    border-radius: 24px;
  }
  .download-options .mini-entry {
    border-left: 0;
    border-top: 1px solid #d3e3ef;
  }
  .download-options .download-card {
    padding: 28px 24px;
  }
  .download-options .download-card h3 {
    font-size: clamp(18px, 5vw, 20px);
  }
  .mini-qr-box {
    min-height: 250px;
  }
}

.download-options {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.download-options .download-card {
  display: flex;
  flex-direction: column;
  gap: 24px;
  min-height: 590px;
}
.download-options .download-card-top {
  min-height: 62px;
  align-items: center;
}
.download-story {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
}
.download-story .download-slogan,
.download-story .download-intro {
  margin: 0;
  text-wrap: pretty;
}
.download-story .download-slogan {
  font-size: 18px;
  line-height: 1.65;
}
.download-options .download-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.download-options .download-actions #release-message {
  margin: 0 0 2px;
  font-size: 13px;
  line-height: 1.5;
}
.download-options .download-actions .text-button {
  align-self: flex-start;
  text-align: left;
  font-size: 12px;
  line-height: 1.4;
}
.download-options .download-actions .button {
  order: 2;
}
.download-options #release-details {
  margin: 0;
  font-size: 11px;
  line-height: 1.4;
}
.download-options #release-details summary {
  font-size: 12px;
  line-height: 1.4;
  cursor: pointer;
}
.download-options #release-details p {
  margin: 7px 0;
  font-size: 11px;
  line-height: 1.45;
}
.download-options #release-details code {
  font-size: 10px;
  line-height: 1.4;
  margin: 3px 0 5px;
}
.download-options #release-details .text-button,
.download-options #copy-status {
  font-size: 11px;
  line-height: 1.4;
}
.download-options #mini-description {
  margin: 0;
}
.download-options .mini-qr-box {
  padding: 0;
  min-height: 240px;
}
.download-options .mini-qr-zoom {
  gap: 12px;
  padding: 0;
  width: min(100%, 224px);
}
.download-options .mini-qr-zoom img {
  width: 100%;
}
.mini-entry-status {
  order: 3;
  margin: 0;
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}
.mini-entry-status:empty {
  display: none;
}
#open-mini-program {
  order: 4;
}

.language-picker {
  position: relative;
  flex: 0 0 auto;
  margin-left: -20px;
}
.language-toggle {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid transparent;
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}
.language-toggle .icon {
  display: block;
  width: 23px;
  height: 23px;
}
.language-toggle:hover,
.language-toggle[aria-expanded='true'] {
  background: var(--pale-blue, #e8f4fc);
  border-color: var(--line);
  color: var(--blue);
}
.language-toggle:focus-visible,
.language-menu button:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}
.language-menu {
  position: absolute;
  top: calc(100% + 14px);
  right: 0;
  padding: 8px;
  width: 166px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: 0 12px 40px #173b5524;
}
.language-menu[hidden] {
  display: none;
}
.language-menu button {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 12px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  text-align: left;
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}
.language-menu button:hover,
.language-menu button[aria-checked='true'] {
  background: var(--pale-blue, #e8f4fc);
  color: var(--blue);
}
.language-menu button[aria-checked='true']::after {
  content: '✓';
  margin-left: 12px;
}
html[lang='en'] .hero-copy h1 {
  font-family: 'Inter', 'Segoe UI', sans-serif;
  font-size: clamp(40px, 4.7vw, 68px);
  letter-spacing: -0.045em;
  line-height: 1.13;
}
html[lang='en'] .hero-line {
  display: block;
  font-size: 0.7em;
  letter-spacing: -0.025em;
  margin-top: 0.26em;
}
html[lang='en'] .hero-copy h1 > .mobile-break {
  display: block;
}
html[lang='en'] #hero-word {
  margin-left: 0.18em;
}
html[lang='en'] .hero-copy .lead {
  font-family: inherit;
  font-size: clamp(16px, 1.5vw, 20px);
  line-height: 1.8;
}
html[lang='en'] .brand-wordmark > span {
  font-size: 17px;
}
html[lang='en'] .brand-wordmark small {
  font-size: 9px;
}
html[lang='en'] .feature-tabs button {
  white-space: normal;
}
html[lang='en'] .feature-title {
  letter-spacing: -0.025em;
}
html[lang='en'] .download-options .download-card h3 {
  font-size: 18px;
  line-height: 1.4;
}
html[lang='en'] .scene-label-compact {
  display: none;
}
html[lang='en'] .scene-label-full {
  display: inline;
  position: static;
  width: auto;
  height: auto;
  overflow: visible;
  clip-path: none;
  white-space: normal;
}
@media (max-width: 1100px) {
  .language-picker {
    margin-left: -12px;
  }
  .download-options .download-card {
    min-height: 560px;
  }
}
@media (max-width: 640px) {
  .download-options {
    grid-template-columns: minmax(0, 1fr);
  }
  .download-options .download-card {
    min-height: 0;
    padding: 28px 24px;
    gap: 24px;
  }
  .download-options .download-card-top {
    min-height: 0;
  }
  .download-story {
    padding: 4px 0 8px;
  }
  .download-options .mini-qr-box {
    padding: 4px 0;
  }
  .download-options .mini-entry-status {
    min-height: 0;
  }
  .mini-entry-status:empty {
    display: none;
  }
  .language-picker {
    margin-left: 0;
  }
  .language-toggle {
    width: 38px;
    height: 38px;
  }
  .nav-wrap {
    gap: 12px;
  }
  .nav-download {
    margin-left: auto;
  }
  html[lang='en'] .hero-copy h1 {
    font-size: clamp(37px, 9.5vw, 52px);
  }
  html[lang='en'] .hero-line {
    font-size: 0.59em;
  }
  html[lang='en'] .feature-tabs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  html[lang='en'] .feature-tabs button {
    font-size: 11px;
    line-height: 1.4;
    padding-inline: 4px;
  }
  html[lang='en'] .hero-art .book-cover > span {
    font-size: 18px;
  }
}
@media (max-width: 360px) {
  .nav-wrap {
    gap: 8px;
    padding-inline: 16px;
  }
  .brand {
    font-size: 17px;
    gap: 6px;
  }
  .brand img {
    width: 28px;
    height: 28px;
  }
  .nav-download {
    padding-inline: 12px;
    gap: 6px;
  }
  .download-options .download-card {
    padding: 26px 20px;
  }
  html[lang='en'] .brand-wordmark > span {
    font-size: 14px;
    white-space: normal;
    line-height: 1.1;
  }
  html[lang='en'] .brand-wordmark {
    width: 80px;
  }
  html[lang='en'] .brand-wordmark small {
    display: none;
  }
  html[lang='en'] .nav-wrap {
    gap: 6px;
  }
  html[lang='en'] .nav-download {
    font-size: 10px;
    padding: 7px 9px;
    gap: 4px;
  }
}

.download-platforms,
.download-dialog:not([open]) {
  display: none;
}
.download-dialog[open] {
  display: block;
  width: min(520px, calc(100vw - 28px));
  max-height: calc(100dvh - 28px);
  max-height: min(90dvh, 820px);
  margin: auto;
  padding: 0;
  overflow: auto;
  overscroll-behavior: contain;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 24px 80px #102d4b40;
  animation: download-dialog-in 240ms var(--ease-out);
}
.download-dialog::backdrop {
  background: #132b3e80;
  backdrop-filter: blur(6px);
}
.download-dialog-bar {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px 8px 22px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}
#download-dialog-close {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: var(--surface);
  border-radius: 50%;
  color: var(--ink);
}
.download-dialog .download-card {
  min-height: 0;
  padding: 22px;
  gap: 20px;
}
.download-dialog .download-card-top {
  min-height: 0;
}
.download-dialog .mini-entry {
  border: 0;
}
.download-dialog .download-story {
  padding: 0;
  gap: 10px;
}
.download-dialog .download-intro,
.download-dialog #mini-description {
  font-size: 14px;
  line-height: 1.75;
}
.download-dialog .download-slogan {
  font-size: 16px;
}
.download-dialog .mini-qr-box {
  min-height: 0;
}
.download-dialog .mini-qr-zoom {
  width: min(100%, 190px);
}
.download-dialog .button {
  min-height: 48px;
  padding: 12px;
}
.download-dialog .download-actions .text-button {
  padding-block: 10px;
}
@keyframes download-dialog-in {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}
@media (max-width: 640px), (max-width: 960px) and (pointer: coarse) {
  .has-download-platforms .download-layout {
    display: block;
  }
  .has-download-platforms #download-description {
    margin: 18px 0 0;
    font-size: 13px;
    line-height: 1.8;
    color: var(--muted);
    white-space: normal;
  }
  .has-download-platforms .download-desktop-options {
    display: none;
  }
  .has-download-platforms .download-platforms {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: stretch;
    gap: 12px;
    margin-top: 24px;
  }
  .download-platform {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-width: 0;
    min-height: 132px;
    padding: 22px 12px;
    border: 1px solid #e8edef;
    border-radius: 22px;
    color: #202522;
    background: #fbfcfc;
    font-size: 15px;
    font-weight: 500;
    transition:
      transform 180ms var(--ease-out),
      border-color 180ms;
  }
  .download-platform[hidden] {
    display: none;
  }
  .download-platform:active {
    transform: scale(0.97);
  }
  .download-platform:focus-visible {
    outline-offset: 3px;
  }
  .platform-symbol {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
  }
  .platform-symbol .icon {
    width: 30px;
    height: 30px;
  }
  .platform-android {
    color: #3ddc84;
  }
  .platform-mini {
    color: #07c160;
  }
}
@media (max-width: 960px) {
  .benefit-grid.is-plan-moving {
    scroll-snap-type: none;
    scroll-behavior: auto;
  }
}
@media (prefers-reduced-motion: reduce) {
  .download-dialog[open] {
    animation: none;
  }
  .download-platform {
    transition: none;
  }
}

/* 产品视频 */
#intro-film-desktop-slot {
  flex: 1 1 0;
  min-height: 0;
  display: grid;
  place-items: center;
}
#intro-film-desktop-slot:empty { display: none; }
.demo-sidebar .sidebar-bottom { margin: 0 10px; }
.intro-film { width: min(100%, 190px); margin: 0 auto; }
.intro-film-card {
  position: relative;
  width: min(100%, 190px);
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid rgb(151 187 211 / 80%);
  border-radius: 12px;
  background: #e9f4fc url('/assets/intro-video-poster.jpg') center / cover no-repeat;
  box-shadow: 0 0 0 3px rgb(232 244 252 / 75%), 0 8px 18px rgb(33 81 118 / 15%);
}
.intro-film-preview {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 240ms ease;
}
.intro-film-preview.has-frame { opacity: 1; }
.intro-film-controls {
  position: absolute;
  inset: auto 0 0;
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 16px 7px 6px;
  color: #fff;
  background: linear-gradient(transparent, rgb(12 35 53 / 72%));
}
.intro-film-play, .intro-film-open {
  display: grid;
  place-items: center;
  flex: none;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid rgb(255 255 255 / 60%);
  border-radius: 50%;
  color: #fff;
  background: rgb(17 47 67 / 68%);
  cursor: pointer;
}
.intro-film-play[hidden] { display: none; }
.intro-film-play svg, .intro-film-open svg { width: 16px; height: 16px; }
.intro-film-play svg[hidden] { display: none; }
.intro-film-play:focus-visible, .intro-film-open:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }
.intro-film-duration { font-size: 10px; font-variant-numeric: tabular-nums; text-shadow: 0 1px 5px rgb(0 0 0 / 55%); }
.intro-film-open { margin-left: auto; text-decoration: none; }
.intro-film-dialog:not([open]) { display: none; }
.intro-film-dialog[open] {
  width: min(960px, calc(100% - 32px));
  max-width: none;
  max-height: calc(100dvh - 32px);
  overflow: auto;
  padding: 12px;
  border: 1px solid #d5e5f1;
  border-radius: 18px;
  background: #f7fbfe;
  color: #182e40;
  box-shadow: 0 20px 60px rgb(12 34 51 / 28%);
}
.intro-film-dialog::backdrop { background: rgb(12 30 44 / 72%); }
.intro-film-dialog-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 2px 10px 6px;
}
.intro-film-dialog-bar h2 { margin: 0; font-size: 16px; }
#intro-film-close {
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  background: #e5f0f7;
  color: #1a4059;
  font-size: 26px;
  cursor: pointer;
}
.intro-film-dialog video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  max-height: calc(100dvh - 108px);
  border-radius: 10px;
  background: #0f202d;
}
.intro-film-error { margin: 12px 4px 4px; color: #253f52; font-size: 14px; }
.intro-film-error button {
  border: 0;
  padding: 4px;
  background: transparent;
  color: #176ea8;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
@media (prefers-reduced-motion: reduce) {
  .intro-film-preview { transition: none; }
}
@media (max-width: 640px) {
  #intro-film-mobile-slot { display: flex; justify-content: center; margin-top: 20px; }
  .scene-progress { flex-wrap: wrap; }
  #intro-film-mobile-slot .intro-film { width: min(100%, 420px); }
  #intro-film-mobile-slot .intro-film-card { width: 100%; }
  #intro-film-mobile-slot .intro-film-play,
  #intro-film-mobile-slot .intro-film-open { width: 44px; height: 44px; }
  #intro-film-mobile-slot .intro-film-duration { font-size: 12px; }
  .intro-film-dialog[open] { width: calc(100% - 24px); padding: 8px; }
}