.about-page {
  background: #f7f5ef;
  color: var(--text-main);
}

.about-page .site-nav {
  position: absolute;
  width: 100%;
  background: rgba(24, 35, 48, 0.78);
  border-bottom-color: rgba(255, 255, 255, 0.18);
}

.about-page .nav-links {
  gap: 0.35rem;
}

.about-hero {
  position: relative;
  min-height: min(78vh, 760px);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: #243447;
}

.about-hero > img,
.about-hero-shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.about-hero > img {
  object-fit: cover;
  object-position: center 58%;
}

.about-hero-shade {
  background: linear-gradient(180deg, rgba(15, 28, 36, 0.06) 22%, rgba(15, 28, 36, 0.82) 100%);
}

.about-hero-copy {
  position: relative;
  z-index: 1;
  padding-top: 10rem;
  padding-bottom: clamp(3rem, 8vw, 6rem);
  color: #fff;
}

.about-kicker,
.about-section-no,
.about-era-label,
.about-platform-mark {
  letter-spacing: 0;
  text-transform: uppercase;
  font-family: var(--font-heading);
  font-weight: 800;
}

.about-kicker {
  margin: 0 0 0.9rem;
  color: #f4c46f;
  font-size: 0.82rem;
}

.about-hero h1 {
  max-width: 850px;
  margin: 0;
  color: #fff;
  font-family: "Noto Serif TC", serif;
  font-size: clamp(2.5rem, 6vw, 5.3rem);
  line-height: 1.14;
  letter-spacing: 0;
  text-wrap: balance;
}

.about-hero-copy > p:last-child {
  max-width: 720px;
  margin: 1.4rem 0 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.8;
}

.container-narrow {
  width: min(100% - 2.5rem, 820px);
  margin-inline: auto;
}

.about-lead {
  padding-block: clamp(4rem, 9vw, 7rem);
}

.about-lead p,
.about-chapter p,
.about-closing p {
  font-size: 1.04rem;
  line-height: 2;
}

.about-dropcap::first-letter {
  float: left;
  margin: 0.08em 0.12em 0 0;
  color: var(--accent);
  font-family: "Noto Serif TC", serif;
  font-size: 4.2rem;
  font-weight: 700;
  line-height: 0.8;
}

.about-chapter-dark {
  padding-block: clamp(4rem, 9vw, 7rem);
  background: #243447;
  color: rgba(255, 255, 255, 0.84);
}

.about-section-no {
  margin: 0 0 0.65rem;
  color: var(--accent);
  font-size: 0.76rem;
}

.about-chapter h2,
.about-closing h2 {
  margin: 0;
  color: var(--primary);
  font-family: "Noto Serif TC", serif;
  font-size: clamp(1.85rem, 4vw, 3.25rem);
  line-height: 1.35;
  letter-spacing: 0;
}

.about-chapter-dark h2 {
  color: #fff;
}

.about-pullquote {
  margin: 2.2rem 0;
  padding: 0.2rem 0 0.2rem 1.5rem;
  border-left: 4px solid var(--accent);
}

.about-pullquote p {
  margin: 0;
  color: #fff;
  font-family: "Noto Serif TC", serif;
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.65;
}

.about-chapter.container {
  padding-top: clamp(4rem, 9vw, 7rem);
  padding-bottom: clamp(4rem, 9vw, 7rem);
}

.about-chapter-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(240px, 0.6fr);
  align-items: end;
  gap: 2rem;
  margin-bottom: 3rem;
}

.about-chapter-heading > p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.7;
}

.about-era-list {
  display: grid;
  gap: clamp(3.5rem, 9vw, 7rem);
}

.about-era {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
}

.about-era-reverse figure {
  order: 2;
}

.about-era figure {
  margin: 0;
}

.about-era img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 4px;
  box-shadow: 0 14px 36px rgba(36, 52, 71, 0.16);
}

.about-era:last-child img {
  object-position: center 55%;
}

.about-era figcaption {
  margin-top: 0.65rem;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.about-era-label {
  margin: 0 0 0.45rem !important;
  color: var(--accent);
  font-size: 0.76rem !important;
}

.about-era h3,
.about-platform h3 {
  margin: 0;
  color: var(--primary);
  font-family: "Noto Serif TC", serif;
  letter-spacing: 0;
}

.about-era h3 {
  font-size: clamp(1.4rem, 2.7vw, 2rem);
  line-height: 1.45;
}

.about-era p {
  margin-bottom: 0;
  color: var(--text-sub);
  font-size: 0.96rem;
  line-height: 1.9;
}

.about-platforms {
  padding-block: clamp(4rem, 9vw, 7rem);
  background: #ebe7dc;
}

.about-platform-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.about-platform {
  min-height: 240px;
  padding: clamp(1.5rem, 4vw, 2.3rem);
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(36, 52, 71, 0.14);
  border-radius: 6px;
  background: #f9f7f2;
  color: inherit;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

a.about-platform:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(36, 52, 71, 0.12);
}

.about-platform-primary {
  background: #243447;
}

.about-platform-primary h3,
.about-platform-primary p,
.about-platform-primary .about-platform-link {
  color: #fff;
}

.about-platform-mark {
  margin-bottom: 1.8rem;
  color: var(--accent);
  font-size: 0.72rem;
}

.about-platform h3 {
  font-size: 1.35rem;
}

.about-platform p {
  margin: 0.8rem 0 1.5rem;
  color: var(--text-sub);
  font-size: 0.92rem;
  line-height: 1.75;
}

.about-platform-link,
.about-platform-note {
  margin-top: auto;
  color: var(--primary);
  font-size: 0.84rem;
  font-weight: 700;
}

.about-platform-note {
  color: var(--text-muted);
  font-weight: 500;
}

.about-closing {
  padding-block: clamp(5rem, 11vw, 9rem);
  text-align: center;
}

.about-closing .about-kicker {
  color: var(--accent);
}

.about-closing p:not(.about-kicker) {
  max-width: 720px;
  margin: 1.25rem auto 0;
  color: var(--text-sub);
}

.about-actions {
  margin-top: 2rem;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.about-actions .btn-hero-secondary {
  border-color: rgba(36, 52, 71, 0.28);
  background: transparent;
  color: var(--primary);
}

.about-actions .btn-hero-secondary:hover {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.about-footer {
  padding: 2.2rem 1.25rem calc(2.2rem + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  text-align: center;
  font-size: 0.86rem;
}

.about-footer p {
  margin: 0.35rem 0;
}

.about-footer a {
  color: var(--text-muted);
}

.about-footer span {
  margin-inline: 0.55rem;
}

.about-mobile-dock button.dock-item {
  appearance: none;
  background: transparent;
  border: 0;
  cursor: pointer;
  font-family: inherit;
}

@media (max-width: 780px) {
  .about-hero {
    min-height: 72vh;
  }

  .about-hero > img {
    object-position: 58% center;
  }

  .about-chapter-heading,
  .about-era,
  .about-platform-grid {
    grid-template-columns: 1fr;
  }

  .about-chapter-heading {
    gap: 1rem;
  }

  .about-era-reverse figure {
    order: 0;
  }

  .about-era {
    gap: 1.5rem;
  }

  .about-era img {
    aspect-ratio: 16 / 10;
  }

  .about-platform {
    min-height: 210px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .about-platform {
    transition: none;
  }
}