.service_bg {
  background-color: rgba(255, 255, 255, 0.35);
}

/* スクロール量を生む */
.service_process {
  height: 1250vh;
  width: 75vw;
  margin: 0 auto;
  position: relative;
}

/* 固定表示 */
.sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
}

/* ===============================
   テキスト
=============================== */
.service_text_area {
  width: 34.72vw;
  position: relative;
}

.service_text {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translate3d(0, calc(-50% + 2rem), 0);
  opacity: 0;
  font-weight: 700;
  transition:
    opacity 0.45s ease,
    transform 0.8s cubic-bezier(.16, 1, .3, 1);
}

.service_text.is-active {
  opacity: 1;
  transform: translate3d(0, -50%, 0);
}

.service_text>* {
  opacity: 0;
  transform: translateY(1.6rem);
  transition:
    opacity 0.7s cubic-bezier(.16, 1, .3, 1),
    transform 0.7s cubic-bezier(.16, 1, .3, 1);
}

.service_text.is-active>* {
  opacity: 1;
  transform: translateY(0);
}

.service_text.is-active> :nth-child(1) {
  transition-delay: 0.06s;
}

.service_text.is-active> :nth-child(2) {
  transition-delay: 0.14s;
}

.service_text.is-active> :nth-child(3) {
  transition-delay: 0.22s;
}

.service_text h2 {
  font-size: 2.43vw;
}

.service_text h3 {
  font-size: 1.6vw;
  margin-top: 2.08vw;
}

.service_text p {
  font-size: 1.11vw;
  margin-top: 1.04vw;
}

/* ===============================
   画像（紙芝居）
=============================== */
.panel {
  position: absolute;
  opacity: 0;
  transition:
    opacity 0.45s ease,
    transform 0.95s cubic-bezier(.16, 1, .3, 1);
  top: 50%;
  transform: translate3d(0, calc(-50% + 2rem), 0) scale(0.96);
  left: 30%;
  overflow: hidden;
}

.panel.is-active {
  opacity: 1;
  transform: translate3d(0, -50%, 0) scale(1);
}

.panel video {
  object-fit: cover;
  display: block;
  width: 25.35vw;
  transition:
    transform 0.95s cubic-bezier(.16, 1, .3, 1),
    opacity 0.95s cubic-bezier(.16, 1, .3, 1);
  transform: scale(1.03);
  opacity: 0.94;
}

.panel.is-active video {
  transform: scale(1);
  opacity: 1;
}

.service_image_area {
  position: relative;
  width: 62.5vw;
}

/* ===============================
   右端ライン
=============================== */
.service_progress_line {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  height: 90%;
  width: .2rem;
}

.line-bg {
  position: absolute;
  inset: 0;
  background: rgba(255, 140, 0, 0.25);
}

.line-active {
  position: absolute;
  top: 0;
  width: 100%;
  height: 0%;
  background: orange;
  transition: height 0.2s linear;
}

/* ドット */
.dots {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  margin: 0;
  padding: 0;
  list-style: none;
}

.dots li {
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: rgba(255, 140, 0, 0.3);
  transform: translateX(-.4rem);
  transition: background 0.3s ease;
}

.dots li.is-active {
  background: orange;
  transform: translateX(-.4rem) scale(1.15);
}

@media (max-width: 48rem) {
  .service_bg {
    background-color: rgba(255, 255, 255, 0.35);
  }

  .service_process {
    position: relative;
    height: auto;
    width: 100%;
    margin: 0;
    padding: 4.8rem 4.4rem 6.4rem 2rem;
  }

  .sticky {
    position: static;
    height: auto;
    display: grid;
    grid-template-columns: 1fr;
    row-gap: 1.8rem;
    padding: 0;
  }

  .service_image_area {
    display: contents;
  }

  .panel {
    position: relative;
    top: auto;
    left: 50%;
    width: min(62vw, 24rem);
    height: auto;
    aspect-ratio: 4 / 5;
    opacity: 0;
    transform: translate(-50%, 2rem) scale(0.98);
    transition:
      opacity 0.6s ease,
      transform 0.8s cubic-bezier(.16, 1, .3, 1);
  }

  .panel.is-active {
    opacity: 1;
    transform: translate(-50%, 0) scale(1);
  }

  .service_image_area .panel:nth-child(1) {
    grid-row: 1;
  }

  .service_image_area .panel:nth-child(2) {
    grid-row: 3;
  }

  .service_image_area .panel:nth-child(3) {
    grid-row: 5;
  }

  .service_image_area .panel:nth-child(4) {
    grid-row: 7;
  }

  .service_image_area .panel:nth-child(5) {
    grid-row: 9;
  }

  .panel video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 1.2rem;
    box-shadow: 0 1.2rem 3rem rgba(0, 0, 0, 0.16);
    transform: scale(1.02);
    opacity: 0.96;
  }

  .service_text_area {
    display: contents;
  }

  .service_text {
    position: relative;
    top: 0;
    left: 0;
    transform: translateY(1.8rem);
    width: 100%;
    max-width: 40rem;
    margin: 0 auto 5.2rem;
    opacity: 0;
    transition:
      opacity 0.6s ease,
      transform 0.8s cubic-bezier(.16, 1, .3, 1);
  }

  .service_text.is-active {
    opacity: 1;
    transform: translateY(0);
  }

  .service_text_area .service_text:nth-child(1) {
    grid-row: 2;
  }

  .service_text_area .service_text:nth-child(2) {
    grid-row: 4;
  }

  .service_text_area .service_text:nth-child(3) {
    grid-row: 6;
  }

  .service_text_area .service_text:nth-child(4) {
    grid-row: 8;
  }

  .service_text_area .service_text:nth-child(5) {
    grid-row: 10;
    margin-bottom: 0;
  }

  .service_text h2 {
    font-size: 2.2rem;
    line-height: 1.35;
  }

  .service_text h3 {
    font-size: 1.5rem;
    line-height: 1.55;
    margin-top: 1.2rem;
  }

  .service_text p {
    font-size: 1.3rem;
    line-height: 1.75;
    margin-top: 1.2rem;
  }

  .service_progress_line {
    display: block;
    right: 2rem;
    top: 4.8rem;
    bottom: 6.4rem;
    height: auto;
    transform: none;
  }

  .dots li {
    width: 0.9rem;
    height: 0.9rem;
    transform: translateX(-0.35rem);
  }
}