.installation-video-page {
  background:
    radial-gradient(circle at top left, rgba(14, 165, 233, 0.12), transparent 34%),
    radial-gradient(circle at top right, rgba(59, 130, 246, 0.1), transparent 28%),
    linear-gradient(180deg, #f8fafc 0%, #ffffff 42%, #eef4ff 100%);
}

.installation-video-page--factory {
  background:
    radial-gradient(circle at top left, rgba(238, 130, 6, 0.12), transparent 34%),
    radial-gradient(circle at top right, rgba(0, 159, 227, 0.1), transparent 28%),
    linear-gradient(180deg, #f8fafc 0%, #ffffff 42%, #eef7fb 100%);
}

.installation-video-page--factory .installation-video-kicker {
  color: #EE8206;
}

.installation-video-page--factory .installation-video-kicker::before {
  background: linear-gradient(135deg, #EE8206, #9FB153);
}

.installation-video-page--factory .installation-video-play::after {
  border-left-color: #9FB153;
}

.installation-video-hero {
  position: relative;
  padding: 72px 0 32px;
  overflow: hidden;
}

.installation-video-hero::before,
.installation-video-hero::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  pointer-events: none;
}

.installation-video-hero::before {
  width: 260px;
  height: 260px;
  right: -80px;
  top: -30px;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.2), rgba(37, 99, 235, 0.08));
}

.installation-video-hero::after {
  width: 180px;
  height: 180px;
  left: -50px;
  bottom: 10px;
  background: linear-gradient(135deg, rgba(249, 115, 22, 0.14), rgba(250, 204, 21, 0.08));
}

.installation-video-shell {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.installation-video-lead {
  max-width: 720px;
  margin-bottom: 34px;
}

.installation-video-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.06);
  color: #595757;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.installation-video-kicker::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(135deg, #9FB153, #595757);
}

.installation-video-title {
  margin: 18px 0 14px;
  font-size: clamp(34px, 5vw, 60px);
  line-height: 1.04;
  font-weight: 800;
  color: #0f172a;
  letter-spacing: -0.04em;
}

.installation-video-desc {
  margin: 0;
  max-width: 660px;
  font-size: 17px;
  line-height: 1.85;
  color: #475569;
}

.installation-video-intro {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 0 0 28px;
}

.installation-video-intro-card {
  padding: 18px 20px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(148, 163, 184, 0.18);
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.05);
}

.installation-video-intro-card strong {
  display: block;
  margin-bottom: 8px;
  color: #0f172a;
  font-size: 15px;
  font-weight: 800;
}

.installation-video-intro-card p {
  margin: 0;
  color: #64748b;
  font-size: 14px;
  line-height: 1.8;
}

.installation-video-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.installation-video-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100%;
  text-decoration: none;
  color: inherit;
  border-radius: 24px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(148, 163, 184, 0.18);
  box-shadow: 0 14px 40px rgba(15, 23, 42, 0.08);
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}

.installation-video-card:hover,
.installation-video-card:focus-visible {
  transform: translateY(-8px);
  box-shadow: 0 22px 50px rgba(15, 23, 42, 0.14);
  border-color: rgba(59, 130, 246, 0.22);
}

.installation-video-media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #dbe5f3;
}

.installation-video-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.04), rgba(15, 23, 42, 0.4));
  opacity: 0.82;
  transition: opacity 0.28s ease;
}

.installation-video-card:hover .installation-video-media::after,
.installation-video-card:focus-visible .installation-video-media::after {
  opacity: 0.92;
}

.installation-video-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transform: scale(1);
  transition: transform 0.4s ease, opacity 0.28s ease, filter 0.28s ease;
}

.installation-video-thumb[data-src] {
  opacity: 0.72;
  filter: blur(4px);
}

.installation-video-thumb.is-loaded {
  opacity: 1;
  filter: none;
}

.installation-video-card:hover .installation-video-thumb,
.installation-video-card:focus-visible .installation-video-thumb {
  transform: scale(1.06);
}

.installation-video-play {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 82px;
  height: 82px;
  transform: translate(-50%, -50%) scale(0.94);
  z-index: 2;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 16px 34px rgba(12, 23, 35, 0.22);
  transition: transform 0.28s ease;
}

.installation-video-play::after {
  content: "";
  position: absolute;
  left: 33px;
  top: 25px;
  width: 0;
  height: 0;
  border-top: 16px solid transparent;
  border-bottom: 16px solid transparent;
  border-left: 23px solid #0b7374;
}

.installation-video-card:hover .installation-video-play,
.installation-video-card:focus-visible .installation-video-play {
  transform: translate(-50%, -50%) scale(1);
}

.installation-video-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 10px;
  padding: 20px 20px 22px;
}

.installation-video-tag {
  display: inline-flex;
  width: fit-content;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(159, 177, 83, 0.12);
  color: #595757;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.installation-video-card-title {
  margin: 0;
  font-size: 20px;
  line-height: 1.35;
  color: #111827;
  font-weight: 800;
}

.installation-video-card-copy {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #64748b;
}

.installation-video-card-link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #0f172a;
  font-size: 14px;
  font-weight: 700;
}

.installation-video-card-link::after {
  content: "->";
  font-size: 16px;
}

.installation-video-faq {
  padding: 6px 0 14px;
}

.installation-video-faq-panel {
  padding: 30px;
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(239, 246, 255, 0.82));
  border: 1px solid rgba(148, 163, 184, 0.18);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.06);
}

.installation-video-faq-panel h2 {
  margin: 0 0 18px;
  font-size: clamp(28px, 3vw, 36px);
  line-height: 1.15;
  color: #0f172a;
  font-weight: 800;
}

.installation-video-faq-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.installation-video-faq-item {
  padding: 20px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(191, 219, 254, 0.72);
}

.installation-video-faq-item h3 {
  margin: 0 0 8px;
  color: #0f172a;
  font-size: 18px;
  line-height: 1.35;
  font-weight: 800;
}

.installation-video-faq-item p {
  margin: 0;
  color: #64748b;
  font-size: 14px;
  line-height: 1.85;
}

.installation-video-richtext {
  width: min(1180px, calc(100% - 40px));
  margin: 18px auto 70px;
  padding: 28px 30px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(148, 163, 184, 0.18);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.06);
  color: #334155;
  font-size: 16px;
  line-height: 1.9;
}

.installation-video-richtext:empty {
  display: none;
}

.installation-video-card.is-revealed {
  animation: installation-video-card-rise 0.5s ease both;
}

@keyframes installation-video-card-rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1024px) {
  .installation-video-intro,
  .installation-video-faq-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 767px) {
  .installation-video-hero {
    padding-top: 54px;
  }

  .installation-video-shell,
  .installation-video-richtext {
    width: min(100% - 24px, 100%);
  }

  .installation-video-grid,
  .installation-video-intro,
  .installation-video-faq-list {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .installation-video-body {
    padding: 18px;
  }

  .installation-video-play {
    width: 72px;
    height: 72px;
  }

  .installation-video-richtext {
    padding: 22px 18px;
    margin-bottom: 54px;
  }

  .installation-video-faq-panel {
    padding: 22px 18px;
    border-radius: 22px;
  }
}