/* ===== Sound Reasons (選ばれる理由) ===== */
.c-sound-reasons {
  background: var(--color-bg-white);
  padding: 120px 0 80px;
}

.c-sound-reasons .c-section-heading {
  margin-bottom: 80px;
}

.c-sound-reasons .c-section-heading__ja {
  font-size: var(--font-size-5xl);
  margin-bottom: 40px;
}

.c-sound-reasons__list {
  display: flex;
  flex-direction: column;
  gap: 80px;
}

.c-sound-reasons__item {
  position: relative;
  isolation: isolate;
  padding: 80px 0;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.c-sound-reasons__item::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  background: var(--color-bg-section);
  z-index: -1;
}

.c-sound-reasons__item:nth-child(1)::before,
.c-sound-reasons__item:nth-child(3)::before {
  left: calc(-1 * var(--edge-gap) + 80px);
  right: calc(-1 * var(--edge-gap));
  border-radius: 100px 0 0 100px;
}

.c-sound-reasons__item:nth-child(2)::before {
  left: calc(-1 * var(--edge-gap));
  right: calc(-1 * var(--edge-gap) + 80px);
  border-radius: 0 100px 100px 0;
}

/* ===== 余白 (1320px) ===== */
@media (max-width: 1320px) {
  .c-sound-reasons__item:nth-child(1)::before,
  .c-sound-reasons__item:nth-child(3)::before {
    left: 0;
  }

  .c-sound-reasons__item:nth-child(2)::before {
    right: 0;
  }
}

.c-sound-reasons__header {
  display: flex;
  align-items: center;
  gap: 24px;
}

.c-sound-reasons__number {
  font-family: var(--font-family-en);
  font-size: var(--font-size-6xl);
  font-weight: var(--font-weight-black);
  color: var(--color-accent-alt);
  line-height: var(--line-height-none);
  margin: 0;
}

.c-sound-reasons__title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-black);
  color: var(--color-text-dark);
  line-height: var(--line-height-normal);
  margin: 0;
}

.c-sound-reasons__columns {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 56px;
}

@media (max-width: 1024px) {
  .c-sound-reasons__columns {
    gap: 24px;
  }
}

.c-sound-reasons__image {
  margin-bottom: 24px;
}

.c-sound-reasons__image img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 0;
}

.c-sound-reasons__column-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-black);
  color: var(--color-text-dark);
  line-height: var(--line-height-normal);
  margin: 0 0 16px;
}

.c-sound-reasons__column-text {
  font-size: var(--font-size-base);
  color: var(--color-text);
  line-height: var(--line-height-relaxed);
  margin: 0;
  text-align: justify;
}

/* ===== Sound Reasons (03) + Partner グループ ===== */
.c-sound-reasons-partner-wrap {
  position: relative;
  isolation: isolate;
}

.c-sound-reasons-partner-wrap::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 80px;
  right: 0;
  background: var(--color-bg-section);
  border-radius: 100px 0 0 100px;
  z-index: -1;
}

/* ===== 余白 (1320px) ===== */
@media (max-width: 1320px) {
  .c-sound-reasons-partner-wrap::before {
    left: 40px;
  }
}

/* ===== 余白 (1024px) ===== */
@media (max-width: 1024px) {
  .c-sound-reasons-partner-wrap::before {
    left: 10px;
    border-radius: var(--radius-xl) 0 0 var(--radius-xl);
  }
}

/* ===== Partner ===== */
.c-partner {
  padding: 40px 0 80px;
}

.c-partner__card {
  position: relative;
  background: var(--color-primary);
  border-radius: var(--radius-xl);
  padding: 104px 80px 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

.c-partner__tag {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 160px;
  height: 160px;
  border-radius: var(--radius-full);
  border: 6px solid var(--color-primary);
  background: var(--color-bg-white);
  font-family: var(--font-family-en);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-black);
  color: var(--color-primary);
}

.c-partner__heading {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-black);
  color: var(--color-text-on-dark);
  text-align: center;
  line-height: var(--line-height-normal);
  margin: 0;
}

.c-partner__lead {
  max-width: 760px;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-on-dark);
  text-align: center;
  line-height: var(--line-height-relaxed);
  margin: 0 0 24px;
}

.c-partner__row {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 48px;
}

.c-partner__image {
  flex: 1 1 0;
  aspect-ratio: 448 / 288.37;
  overflow: hidden;
}

.c-partner__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.c-partner__content {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.c-partner__label {
  font-family: var(--font-family-base);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-black);
  color: var(--color-text-on-dark);
  letter-spacing: 0.1em;
  margin: 0;
}

.c-partner__text {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-on-dark);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

/* ===== Our Story (「Marc」に込めた想い) ===== */
.c-our-story {
  padding: 120px 0;
}

.c-our-story > .l-container {
  position: relative;
}

.c-our-story > .l-container::before {
  content: "";
  position: absolute;
  top: -120px;
  bottom: -120px;
  left: calc(50% - 50vw);
  right: calc(50% - 50vw);
  background: var(--color-bg-dark);
  border-radius: 0 100px 100px 0;
  z-index: 0;
}

.c-our-story > .l-container > * {
  position: relative;
  z-index: 1;
}

.c-our-story .c-section-heading {
  margin-bottom: 80px;
}

.c-our-story .c-section-heading__lead {
  font-size: var(--font-size-2xl);
}

.c-our-story__row {
  display: flex;
  align-items: center;
  gap: 64px;
}

.c-our-story__row:not(:last-child) {
  margin-bottom: 80px;
}

.c-our-story__image {
  flex: 1 1 0;
  aspect-ratio: 536 / 330;
  overflow: hidden;
}

.c-our-story__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.c-our-story__content {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.c-our-story__heading {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-black);
  color: var(--color-text-on-dark);
  letter-spacing: 0.05em;
  margin: 0;
}

.c-our-story__text {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-on-dark);
  line-height: var(--line-height-relaxed);
  margin: 0;
  text-align: justify;
}

/* =========================================
   余白・サイズ調整 (1024px)
   ========================================= */
@media (max-width: 1024px) {
  .p-our-sound .c-features {
    padding: 40px 0;
    margin: 40px 0;
  }

  .c-sound-reasons {
    padding: 40px 0;
  }

  .c-sound-reasons .c-section-heading {
    margin-bottom: 48px;
  }

  .c-sound-reasons__list {
    gap: 24px;
  }

  .c-sound-reasons__item {
    padding: 32px 0;
    gap: 24px;
  }

  .c-sound-reasons__item::before {
    border-radius: var(--radius-xl);
  }

  .c-sound-reasons__item:nth-child(1)::before,
  .c-sound-reasons__item:nth-child(3)::before {
    left: calc(-1 * var(--container-padding) + 10px);
    right: calc(-1 * var(--container-padding));
    border-radius: var(--radius-xl) 0 0 var(--radius-xl);
  }

  .c-sound-reasons__item:nth-child(2)::before {
    left: calc(-1 * var(--container-padding));
    right: calc(-1 * var(--container-padding) + 10px);
    border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
  }

  .c-sound-reasons__title {
    font-size: var(--font-size-2xl);
  }

  .c-sound-reasons__number {
    font-size: var(--font-size-4xl);
  }

  .c-partner {
    padding: 40px 0;
  }

  .c-partner__lead {
    text-align: justify;
  }

  .c-partner__card {
    padding: 80px 24px 40px;
    gap: 16px;
  }

  .c-partner__tag {
    width: 120px;
    height: 120px;
    border-width: 4px;
    font-size: var(--font-size-lg);
  }

  .c-partner__heading {
    font-size: var(--font-size-2xl);
  }

  .c-our-story {
    padding: 40px 0;
  }

  .c-our-story > .l-container::before {
    top: -40px;
    bottom: -40px;
  }

  .c-our-story .c-section-heading {
    margin-bottom: 48px;
  }

  .c-our-story .c-section-heading__lead {
    font-size: var(--font-size-lg-ic);
    text-align: center;
  }

  .c-our-story__row {
    flex-direction: column;
    align-items: stretch;
    gap: 24px;
  }

  .c-our-story__row:not(:last-child) {
    margin-bottom: 48px;
  }

  .c-our-story__image {
    flex: none;
    order: -1;
  }
}

/* =========================================
   モバイル (767px)
   ========================================= */
@media (max-width: 767px) {
  .c-our-story > .l-container::before {
    border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
  }

  .c-sound-reasons .c-section-heading__ja {
    margin-bottom: 8px;
  }

  .c-sound-reasons__item {
    padding: 24px 0;
  }

  .c-sound-reasons__columns {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .c-sound-reasons__header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .c-partner__card {
    padding: 80px 20px 32px;
  }

  .c-partner__heading {
    padding-bottom: 8px;
  }

  .c-partner__tag {
    padding: 6px 24px;
  }

  .c-partner__row {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }

  .c-partner__image {
    flex: none;
    order: -1;
  }

  .c-features .c-section-heading__lead {
    text-align: center;
  }

  .c-features .c-features__list {
    padding-top: 0;
  }

  .c-features__item-title {
    font-size: var(--font-size-xl);
  }

  .c-partner__content {
    gap: 8px;
    padding-bottom: 24px;
  }

  .c-partner {
    padding: 40px 0 0;
  }
}

/* ===== Features (3要素) カードスタイル ===== */
.p-our-sound .c-features {
  background: var(--color-bg-section);
  padding: 120px 0;
  margin: 120px 0;
}

@media (max-width: 1024px) {
  .p-our-sound .c-features {
    padding: 80px 0;
    margin: 0;
  }
}

.p-our-sound .c-features .c-section-heading {
  margin-bottom: 40px;
}

.p-our-sound .c-features__circle {
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  border-radius: 20px;
  border: 4px solid var(--color-primary);
  background: var(--color-bg-section);
  padding: 48px 24px 32px;
  gap: 16px;
}

.p-our-sound .c-features__circle-number {
  top: -28px;
  left: 50%;
  transform: translateX(-50%);
  width: 56px;
  height: 56px;
  font-size: var(--font-size-xl);
}

.p-our-sound .c-features__item-description {
  text-align: justify;
  align-self: stretch;
}

@media (max-width: 1142px) {
  .p-our-sound .c-features__circle {
    padding: 40px 24px 24px;
  }
}

@media (max-width: 990px) {
  .p-our-sound .c-features__item,
  .p-our-sound .c-features__item:first-child,
  .p-our-sound .c-features__item:nth-child(2),
  .p-our-sound .c-features__item:nth-child(3) {
    grid-column: auto;
    margin-top: 0;
    display: flex;
    justify-content: stretch;
  }

  .p-our-sound .c-features__circle {
    width: 100%;
    height: auto;
    padding: 40px 24px 24px;
  }

  .p-our-sound .c-features {
    padding: 64px 0 40px;
  }
}

.sp-only {
  display: none;
}

@media (min-width: 768px) {
  .p-our-sound .c-features__list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    padding-top: 16px;
  }
}

@media (max-width: 767px) {
  .sp-only {
    display: block;
  }

  .p-our-sound .c-features__list {
    grid-template-columns: 1fr;
    gap: 24px;
    justify-content: stretch;
  }

  .c-features__list {
    grid-template-columns: repeat(2, min-content);
    justify-content: center;
    gap: 0 24px;
  }

  .p-our-sound .c-features__circle-number {
    top: -24px;
    left: 50%;
    width: 48px;
    height: 48px;
    font-size: var(--font-size-base);
  }
}