.about-detail-body {
  background:
    linear-gradient(rgba(255, 255, 255, 0.36), rgba(255, 255, 255, 0.08)),
    var(--bg);
}

.about-detail-main {
  padding-bottom: 60px;
}

.about-detail-hero {
  padding: 72px 0 44px;
}

.about-detail-shell {
  display: grid;
  gap: 36px;
  max-width: 900px;
  margin-inline: auto;
}

.about-detail-header {
  display: grid;
  gap: 18px;
}

.about-detail-header h1 {
  margin: 0;
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  line-height: 1.1;
  letter-spacing: -0.075em;
  color: var(--ink);
}

.about-detail-header h1 span {
  display: block;
}

.about-detail-header strong {
  font-weight: 700;
}

.about-detail-lead {
  margin: 0;
  max-width: 800px;
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  line-height: 1.7;
}

.about-detail-body-content {
  padding-top: 20px;
}

.about-content-shell {
  max-width: 880px;
  margin: 0 auto;
  padding: 0;
}

.about-article {
  display: grid;
  gap: 64px;
}

.about-section {
  display: grid;
  gap: 28px;
}

.section-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px;
  align-items: start;
}

.section-number {
  margin: 0;
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  line-height: 1;
  font-weight: 900;
  letter-spacing: -0.08em;
  color: rgba(49, 94, 219, 0.15);
  flex-shrink: 0;
  width: 60px;
  text-align: right;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  line-height: 1.25;
  letter-spacing: -0.04em;
  color: var(--ink);
  font-weight: 700;
}

.section-head h2 br {
  display: none;
}

.section-body {
  display: grid;
  gap: 14px;
}

.section-body p {
  margin: 0;
  color: var(--text);
  font-size: 1rem;
  line-height: 1.8;
  letter-spacing: 0.01em;
}

.section-body p:first-child {
  font-weight: 500;
  color: var(--ink);
}

/* 03 HOW WE THINK - Cycle */
.about-cycle {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0;
  margin-top: 16px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.5);
}

.cycle-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.cycle-label {
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue);
}

.cycle-arrow {
  font-size: 1.1rem;
  line-height: 1;
  color: rgba(49, 94, 219, 0.4);
}

.cycle-item:last-child .cycle-arrow {
  display: none;
}

/* 05 PRINCIPLES */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin-top: 12px;
}

.principle-item {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.5);
  display: grid;
  gap: 10px;
  transition: all 0.2s ease;
}

.principle-item:hover {
  border-color: var(--blue);
  background: rgba(245, 248, 255, 0.7);
}

.principle-number {
  font-size: 1.8rem;
  font-weight: 900;
  line-height: 1;
  color: rgba(49, 94, 219, 0.12);
}

.principle-item h3 {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
}

.principle-item p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text);
}

/* 06 CURRENT */
.current-status {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.status-item {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.48);
  display: grid;
  gap: 4px;
}

.status-label {
  display: block;
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.status-value {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
}

/* 07 END */
.about-section-end {
  gap: 40px;
  padding-top: 24px;
}

.section-end-text {
  display: grid;
  gap: 16px;
}

.section-end-text p {
  margin: 0;
  font-size: clamp(1.4rem, 3vw, 2rem);
  line-height: 1.4;
  letter-spacing: -0.04em;
  color: var(--ink);
  font-weight: 600;
}

.about-navigation {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 12px;
  padding-top: 16px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.5);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--blue);
  transition: all 0.2s ease;
}

.nav-item:hover {
  border-color: var(--blue);
  background: rgba(245, 248, 255, 0.7);
}

.nav-back {
  justify-content: flex-start;
  color: var(--text);
}

.nav-back:hover {
  color: var(--blue);
}

.nav-arrow {
  font-size: 1.1rem;
  line-height: 1;
}

.nav-text {
  letter-spacing: 0.01em;
}

/* Responsive */

@media (max-width: 768px) {
  .about-detail-hero {
    padding: 50px 0 36px;
  }

  .about-detail-shell {
    gap: 24px;
  }

  .section-head {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .section-number {
    width: 100%;
    text-align: left;
    margin-bottom: -8px;
  }

  .section-head h2 br {
    display: block;
  }

  .about-cycle {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    padding: 16px;
  }

  .cycle-label {
    font-size: 0.75rem;
  }

  .principles-grid {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  }

  .about-navigation {
    grid-template-columns: 1fr;
  }

  .about-navigation .nav-back {
    grid-column: 1;
  }
}

@media (max-width: 640px) {
  .about-detail-header h1 {
    font-size: clamp(1.8rem, 4vw, 2.4rem);
  }

  .about-detail-lead {
    font-size: clamp(0.95rem, 1.2vw, 1rem);
  }

  .about-article {
    gap: 48px;
  }

  .about-section {
    gap: 20px;
  }

  .section-head {
    gap: 12px;
  }

  .section-number {
    font-size: 1.8rem;
  }

  .section-head h2 {
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  }

  .about-cycle {
    grid-template-columns: repeat(2, 1fr);
  }

  .principles-grid {
    grid-template-columns: 1fr;
  }

  .principle-item {
    padding: 16px 14px;
  }

  .current-status {
    grid-template-columns: 1fr;
  }

  .section-end-text p {
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  }

  .nav-item {
    font-size: 0.9rem;
    padding: 10px 14px;
  }

  .about-content-shell {
    padding: 0 12px;
  }
}