/* ==========================================================================
   TOPページ PURPOSE（このようなお悩みにプレハブ（軽量鉄骨）がオススメ）
   出典: サイトデザイン参照画像（PURPOSE）
   ========================================================================== */

.purpose {
  /* カード列の実寸に追従させ、可変幅で下端に空の黒背景を残さない。 */
  min-height: 0;
  background: var(--color-bg-header);
  padding-top: var(--section-space-top);
}

/* タイトル周り: 1040px中央寄せ */
.purpose__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px var(--section-content-gap);
}
.purpose__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: var(--section-title-gap);
}
.purpose__title {
  margin: 0;
  font-size: var(--section-title-size);
  font-weight: 800;
  line-height: var(--section-title-line-height);
  color: #fff;
  text-wrap: balance;
}

/* カード部分: タイトルとは別ラップでブラウザ幅にフィット（フルブリード） */
.purpose__cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.purpose-card {
  position: relative;
  display: flex;
  flex-direction: column;
  color: #fff;
  background: var(--color-bg-header);
  border-left: 1px solid rgba(255, 255, 255, .18);
}
.purpose-card:last-child { border-right: 1px solid rgba(255, 255, 255, .18); }

.purpose-card__media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 12;
  overflow: hidden;
}
.purpose-card__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.purpose-card:hover .purpose-card__img { transform: scale(1.04); }

.purpose-card__ribbon {
  position: absolute;
  top: 0;
  left: 0;
  margin: 0;
  max-width: 90%;
  padding: 12px 34px;
  border-radius: 0 0 28px 0;
  background: var(--color-green-dark);
  color: #fff;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: .02em;
}

.purpose-card__body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 280px;
  padding: 28px 34px 34px;
}
.purpose-card__heading {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
  line-height: 1.65;
  letter-spacing: .02em;
}
.purpose-card__product { margin-right: .12em; }
.purpose-card__note {
  margin-right: .45em;
  font-size: 12px;
  font-weight: 700;
  line-height: inherit;
}
.purpose-card__heading .is-accent { color: var(--color-accent-orange); }
.purpose-card__desc {
  margin: 0;
  flex: 1;
  font-size: 14px;
  line-height: 2;
  color: rgba(255, 255, 255, .9);
}
.purpose-card__link {
  position: relative;
  align-self: center;
  margin-top: auto;
  padding-bottom: 13px;
  font-family: "Inter", sans-serif;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: .08em;
  text-decoration: none;
}
.purpose-card__link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 132px;
  height: 1px;
  transform: translateX(-50%);
  background: rgba(255, 255, 255, .55);
}

/* ==========================================================================
   レスポンシブ
   ========================================================================== */
@media (max-width: 900px) {
  .purpose__cards { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .purpose { min-height: 0; }
  .purpose { padding-top: var(--section-space-top); }
  .purpose__inner { padding: 0 20px 28px; }
  .purpose__head {
    align-items: flex-start;
    flex-wrap: nowrap;
    margin-bottom: 18px;
  }
  .purpose__head .section-eyebrow {
    display: grid;
    gap: 4px;
  }
  .purpose__head .section-eyebrow__rule { display: none; }
  .purpose__head .link-arrow {
    flex: none;
    margin-top: 5px;
  }
  .purpose__cards { grid-template-columns: 1fr; }
  .purpose-card,
  .purpose-card:last-child { border-left: 0; border-right: 0; }
  .purpose-card__media { aspect-ratio: 16 / 12; }
  .purpose-card__ribbon { top: 0; max-width: 92%; padding: 10px 20px; border-radius: 0 0 22px 0; font-size: 14px; }
  .purpose-card__body { min-height: 276px; padding: 24px 24px 30px; }
  .purpose-card__heading { font-size: 19px; }
  .purpose-card__note { font-size: 12px; }
}