@charset "UTF-8";

/* ====================================================
  Fluid Design System - 変数定義
  ==================================================== */
:root {
  /* タイポグラフィ */
  --fs-xs:   clamp(0.625rem, 1vw,    0.75rem);
  --fs-sm:   clamp(0.75rem,  1.5vw,  0.875rem);
  --fs-base: clamp(0.875rem, 2vw,    1rem);
  --fs-md:   clamp(1rem,     2.5vw,  1.25rem);
  --fs-lg:   clamp(1.25rem,  3vw,    1.75rem);
  --fs-xl:   clamp(1.5rem,   4vw,    2.5rem);
  --fs-2xl:  clamp(2rem,     6vw,    4rem);

  /* スペーシング */
  --sp-xs:  clamp(0.25rem, 1vw,  0.5rem);
  --sp-sm:  clamp(0.5rem,  2vw,  1rem);
  --sp-md:  clamp(1rem,    4vw,  2rem);
  --sp-lg:  clamp(2rem,    6vw,  4rem);
  --sp-xl:  clamp(3rem,    8vw,  6rem);

  /* カラー */
  --color-bg:        #000000;
  --color-bg-light:  #f2f2f2;
  --color-primary:   #2ec27e;
  --color-accent:    #00c8a0;
  --color-text:      #ffffff;
  --color-text-sub:  rgba(255, 255, 255, 0.7);
  --color-btn-bg:    rgba(0, 180, 120, 0.25);
  --color-btn-border:#2ec27e;
  --color-gold:      #ffd12f;
  --color-dark-green:#0d2a1e;
}

#globalHeader, #pageTop {
  background-color: #fff;
}

.sp {
  display: none;
}

/* ====================================================
  スモークエフェクト
  【目的】article::beforeをposition: fixedで固定する
  【なぜarticleか】ヘッダー・フッターに影響させないため
  ==================================================== */
article::before {
  content: '';
  background: #000000 url('../img/img--bg--effect.png') center top no-repeat;
  background-size: cover;
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: -1;
  pointer-events: none;
}

/* ====================================================
  main・article共通
  ==================================================== */
#main {
  position: relative;
  background-color: transparent;
  overflow: hidden;
}

article {
  position: relative;
}

/* ====================================================
  Section共通スタイル
  ==================================================== */
section {
  position: relative;
  z-index: 1;
  width: 100%;
  margin-bottom: 80px;
}

/* ====================================================
  .content コンテナ 共通スタイル
  ==================================================== */
.content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--sp-md);
}

/* ====================================================
  セクションタイトル 共通スタイル
  ==================================================== */
.section-title {
  text-align: center;
  padding: var(--sp-lg) var(--sp-md);
}

.section-title__main {
  font-family: 'Zen Old Mincho', serif;
  font-size: clamp(1.5rem, 4vw, 40px);
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1.4;
}

.section-title__inner {
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: 40px;
}

.section-title__texts {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-sm);
}

.section-title__inner::before,
.section-title__inner::after {
  content: '';
  display: block;
  width: 14px;
  align-self: stretch;
  flex-shrink: 0;
  border-color: var(--color-gold);
  border-style: solid;
}

.section-title__inner::before {
  border-width: 2px 0 2px 2px;
}

.section-title__inner::after {
  border-width: 2px 2px 2px 0;
}

.section-title__sub {
  display: inline-block;
  background-color: var(--color-gold);
  color: var(--color-dark-green);
  font-size: clamp(0.75rem, 2vw, 18px);
  font-weight: 700;
  padding: 0px 24px;
  letter-spacing: 0.05em;
}

/* ------------------------------
  本文テキスト 共通スタイル
  ------------------------------ */
.section-body-copy p {
  font-size: clamp(0.75rem, 2vw, 20px);
  color: var(--color-text);
  text-align: center;
  line-height: 2;
  letter-spacing: 2px;
}

/* ====================================================
  動画サムネイル・モーダル 共通スタイル
  ==================================================== */
.section-movie {
  width: 100%;
  max-width: 1000px;
  margin: 60px auto;
}

.section-movie__thumb {
  position: relative;
  width: 100%;
  cursor: pointer;
}

.section-movie__thumb-img {
  width: 100%;
  height: auto;
  display: block;
}

.section-movie__play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: clamp(40px, 8vw, 120px);
  height: clamp(40px, 8vw, 120px);
  transition: transform 0.3s ease;
}

.section-movie__thumb:hover .section-movie__play-btn {
  transform: translate(-50%, -50%) scale(1.1);
}

.section-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.section-modal.is-open {
  opacity: 1;
  visibility: visible;
}

.section-modal__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.85);
  cursor: pointer;
}

.section-modal__content {
  position: relative;
  width: 90%;
  max-width: 900px;
  z-index: 1;
}

.section-modal__close {
  position: absolute;
  top: -40px;
  right: 0;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
  padding: 0;
  transition: opacity 0.2s ease;
}

.section-modal__close:hover {
  opacity: 0.7;
}

.section-modal__video {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 16 / 9;
}

.section-modal__replay-wrap {
  text-align: center;
  margin-top: var(--sp-sm);
}

.section-modal__replay {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  background: none;
  border: 1px solid #ffffff;
  color: #ffffff;
  font-size: var(--fs-sm);
  padding: 8px 20px;
  cursor: pointer;
  border-radius: 4px;
  transition: background-color 0.2s ease;
}

.section-modal__replay:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

/* もう一度見るボタン アイコンくるりん */
@keyframes rotate360 {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.section-modal__replay.is-spinning svg {
  animation: rotate360 0.5s ease forwards;
}

/* ====================================================
  before/afterスライダー 共通スタイル
  ==================================================== */
.ba-slider {
  position: relative;
  width: 100%;
  overflow: hidden;
  cursor: ew-resize;
  user-select: none;
}

.ba-slider__before {
  position: relative;
  width: 100%;
}

.ba-slider__before img {
  width: 100%;
  height: auto;
  display: block;
}

/* after画像：clip-pathで右側を隠してbeforeを左に表示する */
.ba-slider__after {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  clip-path: inset(0 50% 0 0);
}

.ba-slider__after img {
  width: 100%;
  height: auto;
  display: block;
  position: absolute;
  top: 0;
  left: 0;
}

.ba-slider__label {
  display: none;
}

.ba-slider__label--before {
  left: var(--sp-sm);
}

.ba-slider__label--after {
  right: var(--sp-sm);
}

.ba-slider__divider {
  position: absolute;
  top: 0;
  width: 2px;
  height: 100%;
  background-color: #ffffff;
  transform: translateX(-50%);
  pointer-events: none;
}

.ba-slider__handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: clamp(32px, 5vw, 48px);
  height: clamp(32px, 5vw, 48px);
  pointer-events: none;
}

.ba-slider__handle svg {
  width: 100%;
  height: 100%;
}

/* ====================================================
  Section 1 - ヒーロー
  ==================================================== */
#section1 {
  background-color: transparent;
  padding-bottom: var(--sp-xl);
  overflow: hidden;
}

.hero-mainvisual {
  width: 100%;
  max-width: 2400px;
  margin: 0 auto;
}

.hero-mainvisual img {
  width: 100%;
  height: auto;
  display: block;
}

.hero-subcopy {
  text-align: center;
  padding: var(--sp-md) var(--sp-md) 0;
  color: var(--color-text);
}

.hero-subcopy__heading {
  font-size: var(--fs-xl);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
  margin-bottom: var(--sp-sm);
}

.hero-subcopy__heading em {
  font-style: normal;
  color: var(--color-primary);
}

.hero-subcopy__text {
  font-size: var(--fs-base);
  color: var(--color-text-sub);
  line-height: 1.8;
  max-width: 600px;
  margin: 0 auto;
  margin-bottom: var(--sp-md);
}

/* ------------------------------
  CTA（Call To Action）ボタンエリア
  ------------------------------ */
.hero-cta {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: var(--sp-sm);
  padding: 0 var(--sp-md);
  max-width: 900px;
  margin: 130px auto var(--sp-lg);
  flex-wrap: wrap;
}

.hero-cta__btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  background-color: #0d2a1e;
  border: none;
  border-radius: 4px;
  padding-top: var(--sp-xs);
  flex: 1;
  min-width: 220px;
  transition: background-color 0.3s ease;
  text-align: center;
}

.hero-cta__btn:hover {
  background-color: rgb(13,42,30,0.6);
  text-decoration: none;
}

.hero-cta__btn-sub {
  font-size: 1.5rem;
  color: #fff;
  line-height: 1.6;
  margin-bottom: var(--sp-sm);
}

.hero-cta__btn-main {
  display: block;
  width: 100%;
  max-width: 250px;
  background-color: #ffd12f;
  color: #0d2a1e;
  font-size: var(--fs-md);
  font-weight: 700;
  line-height: 1.3;
  padding: 20px var(--sp-sm);
  border-radius: 0;
  margin-bottom: var(--sp-sm);
}

.hero-cta__btn-arrow {
  display: block;
  width: 30px;
  height: 20px;
  margin: 0 auto;
}

/* ------------------------------
  ロゴエリア
  ------------------------------ */
.hero-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--sp-lg);
  padding: 0 var(--sp-md);
  margin-bottom: var(--sp-lg);
}

.hero-logos__item img {
  height: clamp(24px, 4vw, 40px);
  width: auto;
  display: block;
}

.hero-logos__divider {
  width: 1px;
  height: clamp(24px, 4vw, 40px);
  background-color: rgba(255, 255, 255, 0.3);
}

/* ------------------------------
  コラボムービーエリア
  ------------------------------ */
.hero-movie {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--sp-md);
}

.hero-movie__inner {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
}

.hero-movie__inner p {
  color: var(--color-text);
  text-align: center;
  margin-top: 30px;
}

.hero-movie__placeholder {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-movie .hero-movie__inner p {
  font-size: clamp(0.75rem, 3.75vw, 20px);
}

.hero-movie__inner .hero-movie__video-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
}

.hero-movie__inner .hero-movie__video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* ====================================================
  Section 2
  ==================================================== */
.section-content {
  margin: 80px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.section-content h3 {
  font-size: clamp(1.125rem, 3vw, 24px);
  display: inline-block;
  background-color: #026360;
  border-radius: 50px;
  padding: 5px 60px;
  font-weight: 500;
  color: var(--color-text);
  text-align: center;
  line-height: 1.5;
  letter-spacing: 0.075em;
}

.section2-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 70px;
  row-gap: 50px;
  margin-top: var(--sp-md);
}

.section2-item {
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
}

.section2-item__title {
  font-size: clamp(0.875rem, 2vw, 18px);
  font-weight: 700;
  color: #86d18d;
  line-height: 1.4;
}

.section2-item__desc {
  font-size: clamp(0.6rem, 1.6vw, 14px);
  color: var(--color-text);
  line-height: 1.7;
}

.section2-item__media {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.section2-item__img {
  width: 100%;
  height: auto;
  display: block;
}

.section2-item__media--hover {
  position: relative;
}

.section2-item__img--hover {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.section2-item__media--hover:hover .section2-item__img--hover {
  opacity: 1;
}

.section2-item__caption {
  font-size: clamp(0.5rem, 1vw, 11px);
  color: var(--color-text);
  line-height: 1.6;
}

/* ====================================================
  Section 3
  ==================================================== */
#section3 {
  background-color: transparent;
}

.section3-speakers {
  display: flex;
  gap: var(--sp-lg);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 40px;
}

.section3-speakers__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-sm);
  flex: 1;
  min-width: 200px;
}

.section3-speakers__img {
  width: 100%;
  height: auto;
  display: block;
}

.section3-speakers__label {
  font-size: clamp(0.875rem, 2vw, 18px);
  font-weight: 700;
  color: #86d18d;
  line-height: 1.4;
}

.section3-notes {
  list-style: none;
  padding: 0;
  margin: var(--sp-md) 0 0;
}

.section3-notes__item {
  position: relative;
  padding-left: 1.5em;
  font-size: clamp(0.5rem, 1vw, 12px);
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 0.5em;
}

.section3-notes__item::before {
  content: '※';
  position: absolute;
  left: 0;
  top: 0;
}

.section-title.dolby {
  padding-bottom: 0;
}

.section-title.dolby h3.dolby {
  color: var(--color-text);
  font-size: 3.2rem;
  letter-spacing: 0.075em;
  margin-bottom: 2.5rem;
}

.section3-dolby {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-md);
  margin-bottom: var(--sp-lg);
  text-align: center;
  background-color: var(--color-text);
  padding-bottom: 50px;
  padding-top: 50px;
}

.section3-dolby__logo {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.section3-dolby__logo img {
  max-width: 400px;
  margin-top: 60px;
  margin-bottom: 60px;
  display: block;
}

.section3-dolby__logo p {
  font-size: 2rem;
  letter-spacing: 0.075em;
  line-height: 2;
}

.section3-notes__item::before {
  color: #0090ff;
}

.section3-dolby .section3-notes .section3-notes__item {
  color: #000;
}

.section3-dolby__text {
  font-size: clamp(0.6rem, 1.6vw, 16px);
  color: var(--color-text);
  line-height: 1.8;
  max-width: 700px;
}

/* ====================================================
  Section 4
  ==================================================== */
.section4-steps__heading {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 0.1em;
  margin: 30px auto;
  color: #ffd72f;
  line-height: 1;
  letter-spacing: 0.075em;
}

.section4-steps__heading-text {
  font-size: clamp(1.5rem, 8vw, 50px);
  font-weight: 700;
}

.section4-steps__heading-num {
  font-size: clamp(3rem, 16vw, 100px);
  font-weight: 700;
  line-height: 1;
  margin-bottom: -10px;
}

.section4-steps__list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-md);
  margin-bottom: var(--sp-md);
}

.section4-steps__item {
  flex: 1;
  background-color: #000000;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.section4-steps__item.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.section4-steps__item:nth-child(1) { transition-delay: 0s; }
.section4-steps__item:nth-child(3) { transition-delay: 0.2s; }
.section4-steps__item:nth-child(5) { transition-delay: 0.4s; }

.section4-steps__img-wrap {
  overflow: hidden;
  width: 100%;
}

.section4-steps__img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.4s ease;
}

.section4-steps__img-wrap:hover .section4-steps__img {
  transform: scale(1.1);
}

.section4-steps__arrow {
  flex-shrink: 0;
  width: clamp(16px, 3vw, 30px);
}

.section4-steps__arrow svg {
  width: 100%;
  height: auto;
  display: block;
}

.section4-notes {
  list-style: none;
  padding: 0;
  margin: var(--sp-md) 0 0;
}

.section4-notes__item {
  position: relative;
  padding-left: 1.5em;
  font-size: clamp(0.5rem, 1vw, 12px);
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 0.5em;
}

.section4-notes__item::before {
  content: '※';
  position: absolute;
  left: 0;
  top: 0;
}

/* ====================================================
  Section 5
  ==================================================== */
#section5 {
  position: relative;
  background-color: #f2f2f2;
  z-index: 2;
  margin-bottom: 0;
}

.section5-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 300px;
  background-image: url('../img/img--section5--bg--lineup.png');
  background-size: contain;
  background-position: center top;
  background-repeat: no-repeat;
  pointer-events: none;
  z-index: 0;
}

.section5-title {
  position: relative;
  z-index: 1;
  font-size: clamp(1.5rem, 4vw, 50px);
  font-weight: 700;
  color: #203620;
  text-align: center;
  padding-top: 140px;
  padding-bottom: 70px;
  letter-spacing: 0.1em;
}

.section5-grid {
  position: relative;
  width: 100%;
  max-width: 930px;
  margin: 0 auto;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 120px;
  row-gap: 80px;
  padding-bottom: var(--sp-xl);
}

.section5-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-md);
}

.section5-item__img-wrap {
  width: 100%;
}

.section5-item__img {
  width: 100%;
  height: auto;
  display: block;
}

.section5-item__btn {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 300px;
  background-color: #000000;
  color: #ffffff;
  text-align: center;
  text-decoration: none;
  border-radius: 50px;
  padding: 12px 24px;
  overflow: hidden;
  transition: background-color 0.3s ease;
}

.section5-item__btn:hover {
  background-color: #222222;
  text-decoration: none;
  color: #ffffff;
}

.section5-item__btn-text {
  font-size: clamp(0.75rem, 1.5vw, 14px);
  font-weight: 700;
  line-height: 1.6;
  color: #ffffff;
  text-align: center;
}

.section5-item__btn::after {
  content: '';
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
  width: 16px;
  height: 16px;
  border-top: 2.5px solid #ffffff;
  border-right: 2.5px solid #ffffff;
  transition: right 0.3s ease;
}

.section5-item__btn:hover::after {
  right: 16px;
}

/* ====================================================
  Section 6
  ==================================================== */
#section6 {
  background: linear-gradient(to bottom, #1a1a1a 0%, #000000 20%);
  margin-bottom: 0;
}

#section6 .section-title__inner::before,
#section6 .section-title__inner::after {
  display: none;
}

.section6-title__main {
  font-family: 'Noto Sans JP', sans-serif;
  color: #ffffff;
  font-size: clamp(1.5rem, 4vw, 50px);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: var(--sp-sm);
}

.section6-title__sub {
  font-size: clamp(0.54rem, 1.44vw, 18px);
  color: #ffffff;
  line-height: 1.8;
  text-align: center;
}

.section6-title__sub.dameoshicopy span {
  display: inline;
  background: linear-gradient(transparent 70%, #0080d5 70%);
  line-height: 1.8;
  padding: 5px 0;
  max-width: 12em;
}

.section6-logo {
  display: flex;
  justify-content: center;
  margin: var(--sp-lg) auto;
}

.section6-logo__img {
  width: 19vw;
  max-width: 300px;
  height: auto;
  display: block;
}

#section6 .section-content {
  flex-direction: column;
  margin-bottom: 0;
}

#section6 .section6-h3 {
  display: flex;
  align-items: center;
  gap: 0;
  background-color: #fff;
  color: #000;
  border-radius: 0;
  font-size: clamp(1.125rem, 3vw, 30px);
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: var(--sp-md);
  padding-top: 10px;
  padding-bottom: 10px;
}

.section6-h3__unext {
  color: #0080d5;
  font-size: clamp(1.5rem, 4vw, 50px);
  font-weight: 700;
  line-height: 1;
  margin-right: 0.1em;
  margin-top: -6px;
}

.section6-perspective {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  overflow: hidden;
  margin-bottom: var(--sp-lg);
  perspective: 1200px;
}

.section6-perspective__img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.1s ease-out;
  transform-style: preserve-3d;
  will-change: transform;
}

.section6-devices {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 70px;
  margin: var(--sp-lg) auto;
}

.section6-devices__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-sm);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1.2s ease, transform 1.2s ease;
}

.section6-devices__item.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.section6-devices__item:nth-child(1) { transition-delay: 0s; }
.section6-devices__item:nth-child(2) { transition-delay: 0.3s; }
.section6-devices__item:nth-child(3) { transition-delay: 0.6s; }
.section6-devices__item:nth-child(4) { transition-delay: 0.9s; }
.section6-devices__item:nth-child(5) { transition-delay: 1.2s; }

.section6-devices__img {
  width: auto;
  height: clamp(60px, 8vw, 100px);
  display: block;
}

.section6-devices__label {
  font-size: clamp(0.75rem, 1.5vw, 14px);
  color: #ffffff;
  text-align: center;
}

.section6-point-table {
  max-width: 800px;
  margin: var(--sp-lg) auto;
  width: 100%;
}

.section6-point-table__img {
  width: 100%;
  height: auto;
  display: block;
}

.section6-cta {
  text-align: center;
  margin: var(--sp-lg) auto var(--sp-xl);
}

.section6-cta__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background-color: #0080d5;
  color: #ffffff;
  text-decoration: none;
  font-size: clamp(1rem, 2vw, 20px);
  font-weight: 700;
  padding: 20px 60px;
  border-radius: 25px;
  transition: background-color 0.3s ease, transform 0.3s ease;
  letter-spacing: 0.05em;
}

.section6-cta__btn:hover {
  background-color: #0066aa;
  transform: translateY(-2px);
  color: #ffffff;
  text-decoration: none;
}

.section6-cta__icon {
  width: clamp(16px, 2vw, 22px);
  height: clamp(16px, 2vw, 22px);
  flex-shrink: 0;
}

/* =======================================================================================================
  SP（SmartPhone）向けレスポンシブ
  ブレイクポイント：max-width: 768px
  ======================================================================================================== */
@media screen and (max-width: 768px) {

  .sp {
    display: block;
  }

  section {
    margin-bottom: 60px;
  }

  .content {
    padding: 0 var(--sp-sm);
  }

  /* セクションタイトル */
  .section-title {
    padding: var(--sp-md) var(--sp-sm);
  }

  .section-title__inner {
    gap: 20px;
  }

  .section-title__inner::before,
  .section-title__inner::after {
    width: 10px;
  }

  .section-title__main {
    font-size: clamp(1.5rem, 5.5vw, 40px);
  }

  .section-title__sub {
    font-size: clamp(0.75rem, 4.5vw, 18px);
  }

  /* 本文テキスト */
  .section-body-copy p {
    letter-spacing: 1px;
    font-size: clamp(0.75rem, 3.75vw, 20px);
    padding-left: 40px;
    padding-right: 40px;
    margin-bottom: 20px;
  }

  .section-body-copy br {
    display: none;
  }

  /* 動画・モーダル */
  .section-movie {
    margin: 40px auto;
  }

  .section-modal__content {
    width: 95%;
  }

  .section-modal__close {
    top: -36px;
    font-size: 1.75rem;
  }

  /* CTA（Call To Action）ボタン */
  .hero-cta {
    margin: 40px auto var(--sp-md);
    gap: 12px;
    padding: 0 var(--sp-md);
    flex-direction: column;
  }

  .hero-cta__btn {
    min-width: auto;
    width: 100%;
    border-radius: 4px;
    padding: var(--sp-sm);
  }

  .hero-cta__btn-sub {
    font-size: 1.5rem;
    margin-bottom: var(--sp-xs);
  }

  .hero-cta__btn-main {
    max-width: 100%;
    padding: 12px var(--sp-sm);
    font-size: 1.5rem;
  }

  /* ロゴ */
  .hero-logos {
    gap: var(--sp-md);
    flex-direction: column;
  }

  .hero-logos__item img {
    height: clamp(24px, 10vw, 40px);
  }

  .hero-movie {
    padding: 0 var(--sp-sm);
  }

  /* Section 2 */
  .section-content {
    margin: 40px 0;
  }

  .section-content h3 {
    font-size: 1.8rem;
  }

  .section2-grid {
    grid-template-columns: 1fr;
    column-gap: 0;
    row-gap: 70px;
  }

  .section2-item {
    gap: 2rem;
  }

  .section2-item__title {
    font-size: 2rem;
  }

  .section2-item__desc {
    font-size: 1.5rem;
  }

  .section2-item__caption {
    font-size: 1rem;
  }

  /* Section 3 */
  .section3-speakers {
    flex-direction: column;
    gap: var(--sp-md);
    margin-top: 20px;
  }

  .section3-speakers__item {
    min-width: 100%;
  }

  .section3-dolby__logo img {
    width: 100%;
  }

  .section3-notes__item {
    font-size: clamp(0.5rem, 2.5vw, 12px);
  }

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

  /* Section 4 */
  .section4-steps__list {
    flex-direction: column;
    gap: var(--sp-sm);
  }

  .section4-steps__arrow {
    width: 30px;
    transform: rotate(90deg);
    margin: 0 auto;
  }

  .section4-steps__item {
    width: 100%;
  }

  .section4-steps__item:nth-child(1) { transition-delay: 0s; }
  .section4-steps__item:nth-child(3) { transition-delay: 0.15s; }
  .section4-steps__item:nth-child(5) { transition-delay: 0.3s; }

  .section4-notes__item {
    font-size: 1rem;
  }

  /* Section 5 */
  .section5-title {
    padding-top: 40px;
    padding-bottom: 20px;
    font-size: 4rem;
  }

  .section5-grid {
    grid-template-columns: 1fr;
    column-gap: 0;
    row-gap: 80px;
    max-width: 100%;
    padding-left: 50px;
    padding-right: 50px;
    justify-content: center;
  }

  .section5-item__btn-text {
    font-size: 1.5rem;
  }

  /* Section 6 */
  .section6-title__sub {
    font-size: 1.6rem;
    text-align: left;
  }

  .section6-title__sub.sp-center {
    text-align: center;
  }

  .section6-devices {
    gap: 30px;
    flex-wrap: wrap;
  }

  .section6-devices__item {
    flex: 0 0 calc(33% - 20px);
  }

  .section6-h3__unext {
    font-size: clamp(1.25rem, 6vw, 30px);
  }

  #section6 .section6-h3 {
    font-size: clamp(0.875rem, 3vw, 18px);
    flex-wrap: wrap;
    flex-direction: column;
  }

  .section6-perspective {
    margin-bottom: var(--sp-md);
  }

  .section6-cta__btn {
    padding: 16px 45px;
    font-size: 1.8rem;
    border-radius: 30px;
  }

  .section6-title__sub.dameoshicopy {
    text-align: center;
    font-size: 2rem;
  }

  .section6-logo__img {
    width: 55vw;
  }

  .section3-speakers__label {
    font-size: 2rem;
    margin-top: 30px;
  }

  .section3-speakers__label:last-child {
    margin-bottom: 30px;
  }

  .section-movie__play-btn {
    width: 80px;
    height: 80px;
  }

  .section3-dolby__logo img {
    max-width: 100%;
    margin-top: 30px;
    margin-bottom: 30px;
    padding-left: 30px;
    padding-right: 30px;
  }

  .section3-notes .section3-notes__item {
    font-size: 1rem;
  }

  .sptitle {
    font-size: 0.8rem;
  }

  .section-title.dolby h3.dolby {
    font-size: 2.5rem;
  }

  .section6-title__sub.dameoshicopy span {
    max-width: 6em;
  }
}

/* ====================================================
  さらに小さいSP（SmartPhone）向け（375px以下）
  ==================================================== */
@media screen and (max-width: 375px) {

  .hero-cta__btn-sub {
    font-size: 0.9rem;
  }

  .section5-title {
    padding-top: 80px;
    padding-bottom: 40px;
  }

  .section-title__inner {
    gap: 12px;
  }
}