.page-about {
  --about-gold-soft: rgba(212, 175, 55, 0.2);
  --about-red-soft: rgba(200, 16, 46, 0.1);
  background-color: var(--c-cream);
  color: var(--c-blue);
  background-image:
    linear-gradient(rgba(212, 175, 55, 0.065) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 175, 55, 0.065) 1px, transparent 1px);
  background-size: 30px 30px;
}

.page-about .breadcrumb {
  max-width: var(--content-width);
  margin-inline: auto;
  padding: 20px 20px 0;
  font-size: 0.82rem;
  color: var(--c-greyblue);
}

.page-about .breadcrumb a {
  color: var(--c-red);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s;
}

.page-about .breadcrumb a:hover {
  border-color: var(--c-red);
}

.page-about .breadcrumb__sep {
  margin: 0 8px;
  color: var(--c-gold);
}

.page-about .about-hero {
  position: relative;
  max-width: var(--content-width);
  margin-inline: auto;
  padding: 40px 20px 48px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "發";
  position: absolute;
  right: -14px;
  top: 24px;
  font-family: var(--font-heading);
  font-size: 150px;
  line-height: 1;
  color: rgba(200, 16, 46, 0.05);
  transform: rotate(14deg);
  pointer-events: none;
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  position: relative;
}

.page-about .about-hero__kicker {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-accent);
  font-size: 0.82rem;
  color: var(--c-red);
  letter-spacing: 0.24em;
  margin-bottom: 14px;
}

.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-size: 2.1rem;
  line-height: 1.3;
  color: var(--c-green);
  margin: 0 0 16px;
}

.page-about .about-hero__accent {
  display: block;
  font-size: 1.12em;
  color: var(--c-red);
}

.page-about .about-hero__lead {
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(13, 27, 42, 0.82);
  margin: 0 0 12px;
}

.page-about .about-hero__intent {
  font-size: 0.92rem;
  line-height: 1.75;
  color: rgba(30, 58, 58, 0.78);
  background: rgba(247, 243, 232, 0.72);
  border-left: 3px solid var(--c-gold);
  padding: 12px 16px;
  margin: 0 0 20px;
}

.page-about .about-hero__intent strong {
  color: var(--c-red);
  font-weight: 600;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  background: var(--c-white);
  border: 1px solid var(--about-gold-soft);
  padding: 10px;
}

.page-about .about-hero__figure::before {
  content: "";
  position: absolute;
  top: -8px;
  left: -8px;
  right: 8px;
  bottom: 8px;
  border: 2px solid var(--c-red);
  z-index: 0;
  pointer-events: none;
}

.page-about .about-hero__figure img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-hero__figure figcaption {
  position: relative;
  z-index: 1;
  font-size: 0.78rem;
  color: var(--c-greyblue);
  padding-top: 8px;
  letter-spacing: 0.05em;
}

.page-about .about-layout {
  max-width: var(--content-width);
  margin-inline: auto;
  padding: 8px 20px 64px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-sidebar {
  background: var(--c-green);
  color: var(--c-cream);
  padding: 22px;
  border: 1px solid rgba(212, 175, 55, 0.35);
  box-shadow: var(--shadow-sm);
  align-self: start;
}

.page-about .about-sidebar__module {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.3);
  padding-bottom: 10px;
  margin-bottom: 14px;
}

.page-about .about-sidebar__label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-accent);
  font-size: 0.88rem;
  color: var(--c-gold);
  letter-spacing: 0.22em;
}

.page-about .about-sidebar__coords {
  font-size: 0.7rem;
  color: var(--c-greyblue);
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.page-about .about-sidebar__title {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--c-gold);
  margin: 0 0 10px;
}

.page-about .about-sidebar__list {
  list-style: none;
  margin: 0 0 8px;
  padding: 0;
  border-bottom: 1px solid rgba(162, 185, 188, 0.18);
}

.page-about .about-sidebar__list li {
  margin-bottom: 2px;
}

.page-about .about-sidebar__list a {
  display: block;
  padding: 7px 0;
  color: var(--c-cream);
  text-decoration: none;
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(162, 185, 188, 0.12);
  transition: color 0.25s, padding-left 0.25s, border-color 0.25s;
}

.page-about .about-sidebar__list a:hover {
  color: var(--c-yellow);
  padding-left: 6px;
  border-color: var(--c-gold);
}

.page-about .about-sidebar__stats {
  margin: 18px 0 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.page-about .about-sidebar__stat {
  display: flex;
  flex-direction: column;
}

.page-about .about-sidebar__stat dt {
  font-size: 0.72rem;
  color: var(--c-greyblue);
  letter-spacing: 0.06em;
  margin-bottom: 4px;
  line-height: 1.4;
}

.page-about .about-sidebar__num {
  font-family: var(--font-heading);
  font-size: 1.28rem;
  font-weight: 700;
  color: var(--c-yellow);
  line-height: 1.3;
  display: inline-block;
}

.page-about .about-sidebar__link {
  margin-top: 18px;
}

.page-about .about-sidebar__link a {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid rgba(212, 175, 55, 0.45);
  color: var(--c-gold);
  font-size: 0.85rem;
  text-decoration: none;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}

.page-about .about-sidebar__link a:hover {
  background: var(--c-gold);
  color: var(--c-green);
  border-color: var(--c-gold);
}

.page-about .about-content {
  min-width: 0;
}

.page-about .about-section {
  scroll-margin-top: 20px;
  margin-bottom: 56px;
}

.page-about .about-section__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-bottom: 2px solid var(--c-gold);
  padding-bottom: 10px;
  margin-bottom: 22px;
}

.page-about .about-section__num {
  font-family: var(--font-accent);
  font-size: 0.88rem;
  color: var(--c-red);
  letter-spacing: 0.15em;
}

.page-about .about-section__head h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--c-green);
  margin: 0;
}

.page-about .about-section__body p {
  font-size: 0.98rem;
  line-height: 1.85;
  margin: 0 0 14px;
  color: rgba(13, 27, 42, 0.84);
}

.page-about .about-timeline__list {
  position: relative;
  margin: 0;
  padding: 4px 0 0 32px;
  list-style: none;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(to bottom, var(--c-red), var(--c-gold));
}

.page-about .about-timeline__item {
  position: relative;
  margin-bottom: 22px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 14px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--c-gold);
  border: 3px solid var(--c-cream);
  box-shadow: 0 0 0 2px var(--c-red);
  box-sizing: border-box;
}

.page-about .about-timeline__item:last-child {
  margin-bottom: 0;
}

.page-about .about-timeline__node {
  display: block;
}

.page-about .about-timeline__node summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 14px;
  background: rgba(247, 243, 232, 0.86);
  border: 1px solid var(--about-gold-soft);
  transition: background 0.25s, border-color 0.25s;
  user-select: none;
}

.page-about .about-timeline__node summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline__node[open] summary {
  background: var(--c-white);
  border-color: var(--c-red);
}

.page-about .about-timeline__node summary:hover {
  background: var(--c-white);
  border-color: var(--c-gold);
}

.page-about .about-timeline__year {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--c-red);
  line-height: 1;
}

.page-about .about-timeline__title {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--c-green);
  line-height: 1.3;
}

.page-about .about-timeline__tag {
  margin-left: auto;
  flex-shrink: 0;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border: 1px solid var(--c-gold);
  border-radius: 999px;
  color: var(--c-gold);
  opacity: 0;
  transition: opacity 0.25s, background 0.25s, color 0.25s;
}

.page-about .about-timeline__item:hover .about-timeline__tag,
.page-about .about-timeline__node[open] .about-timeline__tag {
  opacity: 1;
  background: var(--c-gold);
  color: var(--c-green);
}

.page-about .about-timeline__detail {
  padding: 14px;
  background: rgba(13, 27, 42, 0.02);
  border-left: 2px solid var(--c-gold);
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(13, 27, 42, 0.8);
}

.page-about .about-timeline__detail p {
  margin: 0;
}

.page-about .about-timeline__figure {
  margin: 14px 0 0;
  border: 1px solid var(--about-gold-soft);
  background: var(--c-white);
  padding: 8px;
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-qualifications {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-qualifications__card {
  background: var(--c-white);
  border: 1px solid rgba(200, 16, 46, 0.18);
  border-left-width: 4px;
  padding: 18px 20px;
  transition: box-shadow 0.25s, transform 0.25s;
}

.page-about .about-qualifications__card:nth-child(2) {
  border-left-color: var(--c-gold);
}

.page-about .about-qualifications__card:nth-child(3) {
  border-left-color: var(--c-blue);
}

.page-about .about-qualifications__card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.page-about .about-qualifications__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--c-red);
  color: var(--c-cream);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 10px;
}

.page-about .about-qualifications__card:nth-child(2) .about-qualifications__icon {
  background: var(--c-gold);
  color: var(--c-blue);
}

.page-about .about-qualifications__card:nth-child(3) .about-qualifications__icon {
  background: var(--c-blue);
  color: var(--c-cream);
}

.page-about .about-qualifications h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--c-green);
  margin: 0 0 6px;
}

.page-about .about-qualifications p {
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(13, 27, 42, 0.76);
  margin: 0;
}

.page-about .about-ecosystem {
  background: rgba(30, 58, 58, 0.06);
  border: 1px solid var(--about-gold-soft);
  padding: 22px;
}

.page-about .about-ecosystem > p {
  font-size: 0.96rem;
  line-height: 1.8;
  color: rgba(13, 27, 42, 0.82);
  margin: 0 0 18px;
}

.page-about .about-ecosystem__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-ecosystem__list a {
  display: block;
  padding: 10px 14px;
  background: var(--c-cream);
  border: 1px solid rgba(212, 175, 55, 0.35);
  color: var(--c-green);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}

.page-about .about-ecosystem__list a:hover {
  background: var(--c-green);
  color: var(--c-yellow);
  border-color: var(--c-green);
}

.page-about .about-ecosystem__figure {
  margin: 0;
  background: var(--c-white);
  border: 1px solid var(--about-gold-soft);
  padding: 8px;
}

.page-about .about-ecosystem__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

@media (min-width: 640px) {
  .page-about .about-hero::before {
    font-size: 240px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
    gap: 40px;
    align-items: center;
  }

  .page-about .about-hero h1 {
    font-size: 2.3rem;
  }

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

  .page-about .about-qualifications__card:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: 56px;
  }

  .page-about .about-hero h1 {
    font-size: 2.6rem;
  }

  .page-about .about-layout {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 48px;
  }

  .page-about .about-sidebar {
    position: sticky;
    top: 20px;
  }

  .page-about .about-qualifications {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-qualifications__card:last-child {
    grid-column: auto;
  }

  .page-about .about-ecosystem__list {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-timeline__item:has(.about-timeline__figure) {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 0 20px;
    align-items: start;
  }
}