/* business.html — 事業内容詳細 ============================================ */

.biz-intro {
  padding: 100px 48px 60px;
  background: var(--paper);
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: end;
}
.biz-intro h2 {
  font-family: var(--serif);
  font-size: clamp(36px, 4.4vw, 60px);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin: 24px 0 0;
  color: var(--navy-deep);
}
.biz-intro h2 em { color: var(--accent); font-style: italic; font-weight: 400; }
.biz-intro p {
  font-family: var(--sans);
  font-size: 14.5px;
  line-height: 2.1;
  font-weight: 300;
  color: var(--navy);
  max-width: 540px;
  margin: 0;
}

/* TOC -------------------------------------------------------------------- */

.biz-toc {
  padding: 24px 48px 48px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.biz-toc-list {
  list-style: none; padding: 0; margin: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
}
.biz-toc-list a {
  display: block;
  padding: 28px 24px;
  text-decoration: none;
  border-left: 1px solid var(--line);
  color: var(--navy-deep);
  position: relative;
  transition: background .25s;
}
.biz-toc-list a:hover { background: rgba(201,169,110,0.06); }
.biz-toc-list li:last-child a {
  border-right: 1px solid var(--line);
}
.biz-toc-num {
  font-family: var(--sans);
  font-size: 11px; letter-spacing: 0.3em;
  color: var(--accent); font-weight: 600;
  margin-bottom: 12px;
}
.biz-toc-name {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.4;
}
.biz-toc-en {
  font-family: var(--sans);
  font-size: 9px; letter-spacing: 0.3em;
  color: var(--navy); opacity: 0.5;
  margin-top: 6px;
  text-transform: uppercase;
}

/* SECTION -------------------------------------------------------------- */

.biz-section {
  padding: 120px 48px;
  position: relative;
  border-bottom: 1px solid var(--line);
}
.biz-section:nth-child(odd of .biz-section) { background: var(--paper); }
.biz-section:nth-child(even of .biz-section) { background: var(--paper-deep); }

.biz-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.biz-row.reverse .biz-text { order: 2; }
.biz-row.reverse .biz-photo { order: 1; }

.biz-num-big {
  font-family: var(--serif);
  font-size: clamp(120px, 16vw, 220px);
  font-weight: 500;
  color: var(--accent);
  opacity: 0.18;
  letter-spacing: -0.05em;
  line-height: 0.85;
  margin: 0 0 -32px;
}

.biz-eyebrow {
  font-family: var(--sans);
  font-size: 11px; letter-spacing: 0.4em;
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  display: block;
  margin-bottom: 16px;
}
.biz-name {
  font-family: var(--serif);
  font-size: clamp(36px, 4.5vw, 60px);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin: 0;
  color: var(--navy-deep);
}
.biz-name em {
  color: var(--accent); font-style: italic; font-weight: 400;
}
.biz-text-body {
  margin-top: 28px;
  font-family: var(--sans);
  font-size: 14.5px;
  line-height: 2;
  font-weight: 300;
  color: var(--navy);
  max-width: 520px;
}

.biz-bullets {
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 32px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 400;
  color: var(--navy-deep);
  list-style: none;
  margin-left: 0;
  padding-left: 0;
}
.biz-bullets li {
  position: relative;
  padding-left: 22px;
  line-height: 1.6;
}
.biz-bullets li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 12px; height: 1px;
  background: var(--accent);
}

/* photo column */
.biz-photo {
  position: relative;
  aspect-ratio: 4 / 5;
  background: var(--navy-deep);
  overflow: hidden;
}
.biz-photo image-slot {
  position: absolute; inset: 0; width: 100%; height: 100%;
  --slot-bg: rgba(10,31,61,0.5);
}
.biz-photo .img {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  filter: saturate(0.78) contrast(1.05);
  transform: scale(1.02);
  transition: transform 1.5s cubic-bezier(.2,.7,.3,1);
}
.biz-photo:hover .img { transform: scale(1.08); }
.biz-photo .photo-meta {
  position: absolute;
  bottom: 16px; left: 16px; right: 16px;
  display: flex; justify-content: space-between;
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--paper);
  opacity: 0.85;
  text-transform: uppercase;
}
.biz-photo .photo-meta .num { color: var(--accent); }

.biz-photo::after {
  content: "";
  position: absolute;
  top: 12px; left: 12px;
  width: 14px; height: 14px;
  border-top: 1px solid var(--paper);
  border-left: 1px solid var(--paper);
  opacity: 0.8;
}

/* RESPONSIVE */
@media (max-width: 960px) {
  .biz-intro {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 48px 20px;
  }
  .biz-toc { padding: 0 20px 32px; }
  .biz-toc-list {
    grid-template-columns: 1fr 1fr;
  }
  .biz-toc-list a {
    border-left: none;
    border-bottom: 1px solid var(--line);
    padding: 20px 12px;
  }
  .biz-toc-list li:last-child a {
    border-right: none;
  }
  .biz-section { padding: 64px 20px; }
  .biz-row {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .biz-row.reverse .biz-text { order: 1; }
  .biz-row.reverse .biz-photo { order: 2; }
  .biz-bullets {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .biz-num-big { font-size: 100px; margin-bottom: -16px; }
  .biz-photo { aspect-ratio: 4/3; }
}