.page-about {
  font-family: var(--font-body);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
  background: var(--color-bg);
}

.page-about__breadcrumbs {
  padding-top: 1.5rem;
}

.page-about .breadcrumbs {
  font-size: 0.85rem;
}

.about-hero {
  position: relative;
  padding: 2.5rem 0 3rem;
  overflow: hidden;
}

.about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, transparent 62%, rgba(123, 47, 190, 0.28) 62.2%, rgba(123, 47, 190, 0.08) 76%, transparent 76.2%),
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: auto, 36px 36px, 36px 36px;
  pointer-events: none;
}

.about-hero::after {
  content: "";
  position: absolute;
  width: 340px;
  height: 340px;
  right: -120px;
  top: -140px;
  background: radial-gradient(circle, var(--color-purple-glow), transparent 70%);
  pointer-events: none;
}

.about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2rem;
}

.about-hero__copy .section-label {
  margin-bottom: 1.25rem;
}

.about-hero__copy h1 {
  font-family: var(--font-heading);
  font-size: 2rem;
  line-height: 1.22;
  margin: 0 0 1.5rem;
  max-width: 680px;
  letter-spacing: 0.01em;
}

.about-hero__lead {
  color: var(--color-text-dim);
  font-size: 1.02rem;
  line-height: 1.8;
  max-width: 54ch;
  margin: 0;
  border-left: 3px solid var(--color-green);
  padding-left: 1rem;
}

.about-hero__panel {
  padding: 1.5rem;
  border: 1px solid var(--stroke-glow);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--glass-surface-strong), var(--glass-surface));
  box-shadow: 0 0 32px rgba(57, 255, 20, 0.07);
}

.about-hero__panel-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.about-hero__panel-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-dim);
}

.about-hero__snapshot {
  display: grid;
  gap: 0.75rem;
  margin: 0;
}

.about-hero__snapshot-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--grid-line);
  font-size: 0.9rem;
}

.about-hero__snapshot-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.about-hero__snapshot dt {
  color: var(--color-text-dim);
}

.about-hero__snapshot dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-green);
}

.about-who {
  padding: 3.5rem 0 2.5rem;
}

.about-who__grid {
  display: grid;
  gap: 1.75rem;
  align-items: center;
}

.about-who__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--grid-line);
  background: linear-gradient(135deg, var(--color-bg-elev), var(--color-bg));
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

.about-who__figure img {
  display: block;
  width: 100%;
  height: auto;
}

.about-who__text .section-label {
  margin-bottom: 1rem;
}

.about-who__text h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  line-height: 1.28;
  margin: 0 0 1.25rem;
}

.about-who__para {
  color: var(--color-text-dim);
  line-height: 1.8;
  margin: 0 0 1rem;
  font-size: 0.95rem;
}

.about-who__points {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.about-who__points li {
  position: relative;
  padding-left: 1.6rem;
  color: var(--color-text);
  font-size: 0.95rem;
}

.about-who__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 8px;
  height: 8px;
  background: var(--color-green);
  box-shadow: 0 0 8px var(--color-green-glow);
  transform: rotate(45deg);
  border-radius: 1px;
}

.about-spread {
  padding: 3.5rem 0;
  position: relative;
}

.about-spread::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--color-green-glow), transparent 55%);
}

.about-spread__head {
  margin-bottom: 2.5rem;
}

.about-spread__head .section-label {
  margin-bottom: 0.9rem;
}

.about-spread__head h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  line-height: 1.28;
  margin: 0 0 0.75rem;
}

.about-spread__intro {
  color: var(--color-text-dim);
  margin: 0;
  line-height: 1.7;
  max-width: 56ch;
}

.about-spread__layout {
  display: grid;
  gap: 2.5rem;
}

.about-timeline {
  display: grid;
  gap: 1rem;
}

.about-timeline__item {
  display: grid;
  grid-template-columns: 58px 22px minmax(0, 1fr);
  gap: 0.5rem;
  align-items: start;
}

.about-timeline__year {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-green);
  text-align: right;
  padding-top: 0.55rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.about-timeline__bar {
  position: relative;
  display: flex;
  justify-content: center;
  min-height: 100%;
}

.about-timeline__bar::before {
  content: "";
  width: 2px;
  min-height: 100%;
  background: linear-gradient(to bottom, var(--color-purple), var(--color-green-glow));
  opacity: 0.55;
}

.about-timeline__bar::after {
  content: "";
  position: absolute;
  top: 0.6rem;
  left: 50%;
  transform: translateX(-50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-purple);
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 12px var(--color-green-glow);
  transition: background 0.2s, box-shadow 0.2s, transform 0.2s;
}

.about-timeline__item:last-child .about-timeline__bar::before {
  opacity: 0;
}

.about-timeline__item:hover .about-timeline__bar::after,
.about-timeline__item:focus-within .about-timeline__bar::after {
  background: var(--color-green);
  box-shadow: 0 0 0 5px var(--color-green-glow), 0 0 24px var(--color-green-glow);
  transform: translateX(-50%) scale(1.1);
}

.about-timeline__card {
  margin: 0;
  padding: 0;
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-md);
  background: var(--glass-surface);
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.about-timeline__card:hover,
.about-timeline__card[open] {
  border-color: var(--stroke-glow);
  box-shadow: 0 0 18px var(--color-purple-glow);
}

.about-timeline__summary {
  list-style: none;
  cursor: pointer;
  display: block;
  padding: 1.15rem 1.25rem;
}

.about-timeline__summary::-webkit-details-marker {
  display: none;
}

.about-timeline__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-green);
  border: 1px solid var(--stroke-glow);
  border-radius: var(--radius-pill);
  padding: 0.18rem 0.65rem;
  margin-bottom: 0.6rem;
}

.about-timeline__summary h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  line-height: 1.35;
  margin: 0 0 0.35rem;
}

.about-timeline__summary p {
  color: var(--color-text-dim);
  font-size: 0.88rem;
  line-height: 1.55;
  margin: 0;
}

.about-timeline__summary::after {
  content: "展开细节 +";
  display: inline-block;
  margin-top: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-green);
}

.about-timeline__card[open] .about-timeline__summary {
  border-bottom: 1px solid var(--grid-line);
}

.about-timeline__card[open] .about-timeline__summary::after {
  content: "收起 −";
}

.about-timeline__detail {
  padding: 1rem 1.25rem 1.25rem;
  color: var(--color-text-dim);
  font-size: 0.85rem;
  line-height: 1.65;
}

.about-timeline__detail p {
  margin: 0;
}

.about-facts {
  display: grid;
  gap: 1rem;
}

.about-facts__panel {
  padding: 1.4rem 1.5rem;
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-md);
  background: var(--glass-surface);
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.about-facts__panel:hover {
  border-color: var(--stroke-glow);
  box-shadow: 0 0 20px var(--color-green-glow);
  transform: translateY(-3px);
}

.about-facts__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin: 0 0 0.5rem;
}

.about-facts__value {
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-green);
  margin: 0 0 0.4rem;
}

.about-facts__desc {
  color: var(--color-text-dim);
  font-size: 0.85rem;
  line-height: 1.5;
  margin: 0;
}

.about-data {
  padding: 3rem 0;
  border-top: 1px solid var(--grid-line);
  background: linear-gradient(180deg, transparent, rgba(123, 47, 190, 0.07), transparent);
}

.about-data__head {
  margin-bottom: 2rem;
}

.about-data__head .section-label {
  margin-bottom: 0.9rem;
}

.about-data__head h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  line-height: 1.28;
  margin: 0 0 0.7rem;
}

.about-data__intro {
  color: var(--color-text-dim);
  line-height: 1.7;
  max-width: 64ch;
  margin: 0;
}

.about-data__grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.about-data__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--grid-line);
  background: linear-gradient(135deg, var(--color-bg-elev), var(--color-bg));
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.3);
}

.about-data__figure img {
  display: block;
  width: 100%;
  height: auto;
}

.about-data__steps {
  display: grid;
  gap: 1.15rem;
}

.about-data__step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1.15rem;
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-md);
  background: var(--glass-surface);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.about-data__step:hover {
  border-color: var(--color-purple-glow);
  box-shadow: 0 0 16px var(--color-purple-glow);
}

.about-data__num {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-green);
  border: 1px solid var(--stroke-glow);
  border-radius: var(--radius-sm);
  width: 2.2rem;
  height: 2.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-data__step h3 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  line-height: 1.3;
  margin: 0 0 0.35rem;
}

.about-data__step p {
  color: var(--color-text-dim);
  font-size: 0.85rem;
  line-height: 1.6;
  margin: 0;
}

.about-cert {
  padding: 3.5rem 0;
}

.about-cert__head {
  margin-bottom: 2rem;
}

.about-cert__head .section-label {
  margin-bottom: 0.9rem;
}

.about-cert__head h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  line-height: 1.28;
  margin: 0;
}

.about-cert__grid {
  display: grid;
  gap: 1.25rem;
}

.about-cert__card {
  padding: 1.6rem 1.75rem;
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-lg);
  background: var(--glass-surface);
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.about-cert__card:hover {
  transform: translateY(-4px);
  border-color: var(--color-purple-glow);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.3);
}

.about-cert__icon {
  display: inline-flex;
  width: 2.5rem;
  height: 2.5rem;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-purple-glow);
  color: var(--color-green);
  font-size: 1.2rem;
  margin-bottom: 1.1rem;
}

.about-cert__card h3 {
  font-family: var(--font-heading);
  font-size: 1.02rem;
  line-height: 1.35;
  margin: 0 0 0.5rem;
}

.about-cert__card p {
  color: var(--color-text-dim);
  font-size: 0.88rem;
  line-height: 1.65;
  margin: 0;
}

.about-team {
  padding: 3.5rem 0;
  border-top: 1px solid var(--grid-line);
  background: linear-gradient(180deg, rgba(6, 11, 28, 0.5), transparent);
}

.about-team__grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.about-team__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--grid-line);
  background: linear-gradient(180deg, var(--color-bg-elev), var(--color-bg-deep));
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.35);
}

.about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
}

.about-team__text .section-label {
  margin-bottom: 0.9rem;
}

.about-team__text h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  line-height: 1.28;
  margin: 0 0 1rem;
}

.about-team__intro {
  color: var(--color-text-dim);
  line-height: 1.75;
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
}

.about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: 1fr;
}

.about-team__list li {
  padding: 0.9rem 1rem;
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-md);
  background: var(--glass-surface);
  transition: border-color 0.2s;
}

.about-team__list li:hover {
  border-color: var(--stroke-glow);
}

.about-team__list strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.about-team__list span {
  display: block;
  color: var(--color-text-dim);
  font-size: 0.8rem;
  line-height: 1.45;
}

.about-more {
  padding: 3rem 0 4.5rem;
}

.about-more__panel {
  display: grid;
  gap: 1.75rem;
  padding: 1.75rem;
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--glass-surface-strong), var(--glass-surface));
  align-items: center;
}

.about-more__panel .section-label {
  margin-bottom: 0.8rem;
}

.about-more__panel h2 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  line-height: 1.3;
  margin: 0 0 0.5rem;
}

.about-more__desc {
  color: var(--color-text-dim);
  margin: 0;
  line-height: 1.7;
  max-width: 52ch;
}

.about-more__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

@media (min-width: 480px) {
  .about-team__list {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 768px) {
  .about-hero {
    padding: 4rem 0 4.5rem;
  }

  .about-hero__copy h1 {
    font-size: 2.4rem;
  }

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

  .about-spread__intro {
    max-width: 64ch;
  }

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

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

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

  .about-more__panel {
    padding: 2.25rem;
  }
}

@media (min-width: 900px) {
  .about-hero__inner {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: center;
    gap: 3rem;
  }

  .about-hero__copy h1 {
    font-size: 2.75rem;
  }
}

@media (min-width: 1024px) {
  .about-spread__layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 3.5rem;
    align-items: start;
  }

  .about-data__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 3rem;
  }

  .about-more__panel {
    grid-template-columns: 1fr auto;
    gap: 2.5rem;
  }
}