.section--fv {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  background: var(--color-bg-black);
}

.section--fv__media,
.section--fv__video,
.section--fv__overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.section--fv__video {
  object-fit: cover;
  object-position: 54% center;
}

.section--fv__overlay {
  background:
    linear-gradient(90deg, rgba(var(--color-black-rgb), 0.34), rgba(var(--color-black-rgb), 0.16)),
    rgba(var(--color-black-rgb), 0.15);
}

/* 動画上に軽量ノイズテクスチャ（職人感UP） */
.section--fv__media::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    radial-gradient(rgba(0, 0, 0, 0.04) 1px, transparent 1px);
  background-size: 3px 3px, 4px 4px;
  background-position: 0 0, 1px 1px;
  pointer-events: none;
  z-index: 1;
  mix-blend-mode: overlay;
  opacity: 0.7;
}

.section--fv__content {
  position: relative;
  z-index: 1;
  min-height: 100svh;
  padding: calc(var(--header-height) + 32px) var(--space-side) 44px;
}

.section--fv__headline {
  position: absolute;
  top: clamp(118px, 15vh, 160px);
  right: var(--space-side);
  display: flex;
  align-items: flex-start;
  gap: 22px;
}

.section--fv__title {
  display: flex;
  flex-direction: row-reverse;
  gap: 16px;
  color: rgba(var(--color-white-warm), 0.95);
  font-size: 32px;
  font-weight: 400;
  line-height: 2;
  letter-spacing: 0.08em;
}

.section--fv__title-line {
  writing-mode: vertical-rl;
  opacity: 0;
  transform: translateY(-24px);
  animation: fvTitleReveal 1100ms var(--ease-standard) forwards;
}

.section--fv__title-line:nth-child(1) {
  animation-delay: 600ms;
}

.section--fv__title-line:nth-child(2) {
  animation-delay: 900ms;
}

@keyframes fvTitleReveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .section--fv__title-line {
    opacity: 1;
    transform: none;
    animation: none;
  }
}

.section--fv__headline-rule {
  order: -1;
  display: block;
  width: 1px;
  height: min(240px, 38vh);
  margin-top: 18px;
  background: rgba(var(--color-gold-matte-rgba), 0.8);
}

.section--fv__scroll {
  position: absolute;
  right: var(--space-side);
  bottom: 96px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: rgba(var(--color-silver), 0.65);
  font-size: 10px;
  letter-spacing: 0.2em;
  writing-mode: vertical-rl;
}

.section--fv__scroll-rule {
  width: 1px;
  height: 42px;
  background: rgba(var(--color-silver), 0.65);
}

@media (min-width: 768px) {
  .section--fv__content {
    padding-bottom: 64px;
  }

  .section--fv__headline {
    top: clamp(132px, 16vh, 180px);
    right: clamp(120px, 14vw, 200px);
    gap: 32px;
  }

  .section--fv__title {
    gap: 24px;
    font-size: 44px;
  }

  .section--fv__headline-rule {
    margin-top: 24px;
  }

  .section--fv__scroll {
    right: 24px;
    bottom: 48px;
    font-size: 11px;
  }
}