.about-book {
  background: #edf9fc;
}

.about-book-panel {
  display: grid;
  grid-template-columns: minmax(14rem, .65fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 6rem);
  align-items: center;
  max-width: 66rem;
}

.about-book-cover {
  margin: 0;
  padding: 2rem;
  border-radius: 2rem;
  background: #fff;
}

.about-book-cover img {
  display: block;
  width: 100%;
  height: auto;
  box-shadow: 0 12px 30px rgba(16, 42, 59, .14);
}

.about-book-copy h2 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 3.5vw, 3rem);
  line-height: 1.1;
}

.about-book-copy p {
  color: #607482;
  line-height: 1.7;
}

.about-book-copy .about-book-subtitle {
  color: #102a3b;
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.5;
}

.about-book-facts {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  padding: 0;
  margin: 1.5rem 0;
  list-style: none;
}

.about-book-facts li {
  padding: .5rem .8rem;
  border: 1px solid #cbdfe7;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 600;
}

@media (max-width: 700px) {
  .about-book-panel { grid-template-columns: 1fr; }
  .about-book-cover { width: min(100%, 18rem); margin-inline: auto; }
}

.about-profile-card {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 1.25rem;
  align-items: center;
}

.about-profile-card > img {
  width: 7rem;
  height: 8.5rem;
  object-fit: cover;
  border-radius: 1.25rem;
}

.about-profile-card strong {
  font-size: clamp(1.45rem, 2vw, 2rem);
}

.about-profile-card p {
  margin-bottom: 0;
}

@media (max-width: 1100px) {
  .about-profile-card {
    grid-template-columns: 5rem 1fr;
    gap: 1rem;
  }

  .about-profile-card > img {
    width: 5rem;
    height: 6rem;
    border-radius: 1rem;
  }

  .about-profile-card strong {
    font-size: 1.3rem;
  }
}

.about-founder .service-media img {
  object-position: center 28%;
}

.about-principles {
  padding: clamp(6rem, 10vw, 9rem) 0;
}

.about-principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.about-principle-grid article {
  min-height: 18rem;
  padding: clamp(1.6rem, 3vw, 2.5rem);
  background: var(--service-paper);
  border: 1px solid var(--service-line);
  border-radius: 1.75rem;
}

.about-principle-grid span,
.about-milestone-list span {
  color: var(--service-cyan-deep);
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.08em;
}

.about-principle-grid h3 {
  margin: 4.5rem 0 0.65rem;
  font-size: 1.5rem;
}

.about-principle-grid p {
  margin: 0;
  color: var(--service-muted);
}

.about-timeline {
  border-top: 1px solid var(--service-line);
}

.about-timeline-row {
  display: grid;
  grid-template-columns: 9rem minmax(14rem, 0.72fr) minmax(20rem, 1.28fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: center;
  min-height: 9rem;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--service-line);
}

.about-timeline-row time {
  color: var(--service-cyan-deep);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.05em;
}

.about-timeline-row h3,
.about-timeline-row p {
  margin: 0;
}

.about-timeline-row h3 {
  font-size: 1.3rem;
}

.about-timeline-row p {
  color: var(--service-muted);
}

.about-timeline-highlight h3,
.about-timeline-highlight time {
  color: var(--service-cyan-deep);
}

.about-milestone-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(28rem, 1.2fr);
  gap: clamp(3rem, 8vw, 8rem);
  padding: clamp(2.5rem, 6vw, 6rem);
  color: #fff;
  background: var(--service-ink);
  border-radius: 2rem;
}

.about-milestone-panel h2 {
  max-width: 16ch;
  margin: 0 0 1.2rem;
  color: #fff;
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1.04;
}

.about-milestone-panel > div > p {
  color: rgba(255, 255, 255, 0.7);
}

.about-milestone-list article {
  padding: 1.25rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.about-milestone-list article:first-child {
  padding-top: 0;
}

.about-milestone-list article:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.about-milestone-list h3 {
  margin: 0.25rem 0 0.4rem;
  color: #fff;
  font-size: 1.2rem;
}

.about-milestone-list p {
  margin: 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.92rem;
}

@media (max-width: 860px) {
  .about-principle-grid,
  .about-milestone-panel {
    grid-template-columns: 1fr;
  }

  .about-timeline-row {
    grid-template-columns: 7rem 1fr;
  }

  .about-timeline-row p {
    grid-column: 2;
  }
}

@media (max-width: 560px) {
  .about-profile-card {
    grid-template-columns: 5rem 1fr;
    padding: 1rem;
  }

  .about-profile-card > img {
    width: 5rem;
    height: 6rem;
    border-radius: 1rem;
  }

  .about-principle-grid article {
    min-height: 14rem;
  }

  .about-principle-grid h3 {
    margin-top: 3rem;
  }

  .about-timeline-row {
    grid-template-columns: 1fr;
    gap: 0.45rem;
  }

  .about-timeline-row p {
    grid-column: 1;
  }

  .about-milestone-panel {
    grid-template-columns: 1fr;
    padding: 1.5rem;
    border-radius: 1.5rem;
  }

  .about-milestone-panel h2 {
    font-size: 1.7rem;
  }
}