.page-about {
  --about-aside-w: 200px;
  background-color: var(--deep-space);
  background-image:
    radial-gradient(1100px 520px at 88% -6%, rgba(107, 75, 214, 0.22), transparent 62%),
    radial-gradient(760px 460px at -10% 38%, rgba(53, 224, 224, 0.08), transparent 60%);
  background-repeat: no-repeat;
  color: var(--star-white);
}

.page-about .breadcrumbs {
  padding-block: clamp(0.85rem, 2vw, 1.35rem) 0;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-block: clamp(1.75rem, 5vw, 3.5rem) clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 5vw, 3.5rem);
  align-items: start;
}

.page-about .about-hero__title {
  margin: 0.45em 0 0.55em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 5.6vw, 4.25rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  text-shadow: 0 0 1px rgba(53, 224, 224, 0.28);
}

.page-about .about-hero__lede {
  max-width: 46ch;
  color: var(--mist-gray);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2.75rem;
  margin: 2rem 0 0;
  padding: 1.5rem 0 0;
  list-style: none;
  border-top: 1.5px solid var(--line-soft);
}

.page-about .about-hero__facts li {
  min-width: 5.25rem;
}

.page-about .about-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.6rem, 4vw, 2.35rem);
  letter-spacing: 0.02em;
  color: var(--aurora-cyan);
  text-shadow: 0 0 18px rgba(53, 224, 224, 0.32);
}

.page-about .about-hero__label {
  display: block;
  margin-top: 0.35rem;
  font-size: var(--step-14);
  letter-spacing: 0.08em;
  color: var(--mist-gray);
}

.page-about .about-hero__media {
  margin: 0;
}

.page-about .about-hero__media .media-frame__inner img,
.page-about .about-guide__figure .media-frame__inner img,
.page-about .about-team__figure .media-frame__inner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 通用双栏骨架 ---------- */

.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-split__aside {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding-bottom: 1.25rem;
  border-bottom: 1.5px solid var(--line-soft);
}

.page-about .about-note {
  margin: 0;
  font-size: var(--step-12);
  letter-spacing: 0.08em;
  color: var(--mist-gray);
}

.page-about .about-note__mono {
  display: block;
  margin-top: 0.3rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--step-22);
  letter-spacing: 0.02em;
  color: var(--dark-gold);
}

.page-about .section-title {
  margin-top: 0.35em;
}

.page-about .about-split__body > .lede {
  max-width: 56ch;
}

/* ---------- 六栏服务介绍 ---------- */

.page-about .about-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
  margin-top: 2rem;
}

.page-about .about-col {
  border: 1.5px solid var(--line-purple);
  border-radius: var(--radius);
  background: var(--orbit-slate);
  overflow: hidden;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .about-col:hover {
  transform: translateY(-4px);
  border-color: var(--aurora-cyan);
}

.page-about .about-col--focus {
  border-color: var(--dark-gold);
  box-shadow: 6px 6px 0 rgba(201, 162, 75, 0.2);
}

.page-about .about-col__trigger {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  width: 100%;
  padding: 0.95rem 1.05rem 0.55rem;
  background: transparent;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .about-col__trigger:focus-visible {
  outline: 2px solid var(--aurora-cyan);
  outline-offset: -3px;
}

.page-about .about-col__index {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--step-14);
  letter-spacing: 0.06em;
  color: var(--dark-gold);
}

.page-about .about-col--focus .about-col__index {
  color: var(--aurora-cyan);
}

.page-about .about-col__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-18);
  letter-spacing: -0.01em;
}

.page-about .about-col__body {
  padding: 0 1.05rem 1rem;
}

.page-about .about-col__body p {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.75;
  color: var(--mist-gray);
}

.page-about .about-col[data-open="false"] .about-col__body {
  display: none;
}

.page-about .about-guide__figure {
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
}

/* ---------- 九大分类 ---------- */

.page-about .about-cats-section .lede {
  max-width: 62ch;
}

.page-about .about-cats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.85rem;
  margin: 2.25rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cat {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.15rem 1.15rem 1.25rem;
  border: 1.5px solid var(--line-soft);
  border-left: 3px solid var(--galaxy-purple);
  border-radius: var(--radius);
  background: rgba(20, 28, 51, 0.62);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .about-cat:hover {
  transform: translateY(-4px);
  border-left-color: var(--aurora-cyan);
}

.page-about .about-cat__index {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--step-12);
  letter-spacing: 0.1em;
  color: var(--mist-gray);
}

.page-about .about-cat__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-22);
  letter-spacing: -0.01em;
}

.page-about .about-cat__text {
  margin: 0;
  font-size: var(--step-16);
  line-height: 1.8;
  color: var(--mist-gray);
}

.page-about .about-cat__meta {
  margin: auto 0 0;
  padding-top: 0.6rem;
  font-size: var(--step-12);
  letter-spacing: 0.08em;
  color: var(--aurora-cyan);
}

.page-about .about-cats__foot {
  margin: 2rem 0 0;
  max-width: 56ch;
  font-size: var(--step-16);
  line-height: 1.9;
  color: var(--mist-gray);
}

.page-about .about-inline-link {
  color: var(--aurora-cyan);
  text-decoration: none;
  border-bottom: 1.5px solid rgba(53, 224, 224, 0.5);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--dark-gold);
  border-bottom-color: var(--dark-gold);
}

/* ---------- 团队四象限 ---------- */

.page-about .about-quad {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.85rem;
  margin-top: 2rem;
}

.page-about .about-quad__cell {
  position: relative;
  padding: 1.2rem 1.15rem 1.3rem 1.15rem;
  border: 1.5px solid var(--line-purple);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(107, 75, 214, 0.14), rgba(11, 18, 38, 0.72));
}

.page-about .about-quad__axis {
  margin: 0 0 0.55rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--step-14);
  letter-spacing: 0.06em;
  color: var(--star-white);
}

.page-about .about-quad__axis::before {
  content: "";
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  margin-right: 0.5rem;
  border-radius: 50%;
  background: var(--galaxy-purple);
  box-shadow: 0 0 12px rgba(107, 75, 214, 0.8);
  vertical-align: middle;
}

.page-about .about-quad__text {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.8;
  color: var(--mist-gray);
}

.page-about .about-team__figure {
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
}

.page-about .about-team__prose {
  margin-top: clamp(1.5rem, 3vw, 2rem);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline-section .lede {
  max-width: 60ch;
}

.page-about .about-timeline {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 78%;
  gap: 1rem;
  margin: 2.5rem 0 0;
  padding: 0 0 1.25rem;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-color: var(--galaxy-purple) transparent;
  scrollbar-width: thin;
}

.page-about .about-timeline__item {
  position: relative;
  scroll-snap-align: start;
  padding: 2rem 1.15rem 1.4rem;
  border: 1.5px solid var(--line-purple);
  border-radius: var(--radius);
  background: var(--orbit-slate);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: 1.2rem;
  left: 1.15rem;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--dark-gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 75, 0.16);
}

.page-about .about-timeline__ver {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--step-12);
  letter-spacing: 0.1em;
  color: var(--dark-gold);
}

.page-about .about-timeline__title {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-18);
  line-height: 1.4;
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.8;
  color: var(--mist-gray);
}

/* ---------- 为什么选我们 ---------- */

.page-about .about-reasons-section .lede {
  max-width: 58ch;
}

.page-about .about-reasons {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
  margin-top: 2.5rem;
}

.page-about .about-reason {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.4rem 1.2rem 1.5rem;
  border: 1.5px solid var(--line-purple);
  border-radius: var(--radius);
  background: var(--orbit-slate);
}

.page-about .about-reason .stat-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--step-28);
  letter-spacing: 0.02em;
  color: var(--aurora-cyan);
  text-shadow: 0 0 16px rgba(53, 224, 224, 0.28);
}

.page-about .about-reason .stat-card__label {
  margin: 0;
  font-size: var(--step-14);
  letter-spacing: 0.06em;
  color: var(--star-white);
}

.page-about .about-reason__text {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.8;
  color: var(--mist-gray);
}

.page-about .about-reasons__foot {
  margin: 2rem 0 0;
  max-width: 60ch;
  font-size: var(--step-16);
  line-height: 1.9;
  color: var(--mist-gray);
}

/* ---------- 认证与备案 ---------- */

.page-about .about-cert {
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border: 1.5px solid var(--dark-gold);
  border-radius: var(--radius);
  background: linear-gradient(140deg, rgba(201, 162, 75, 0.11), rgba(11, 18, 38, 0.78) 62%);
}

.page-about .about-cert__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.1rem;
  margin: 1.75rem 0 0;
  padding-bottom: 1.5rem;
  border-bottom: 1.5px solid rgba(201, 162, 75, 0.28);
}

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

.page-about .about-cert__key {
  margin: 0 0 0.4rem;
  font-size: var(--step-12);
  letter-spacing: 0.08em;
  color: var(--mist-gray);
}

.page-about .about-cert__val {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--step-22);
  letter-spacing: 0.02em;
  color: var(--dark-gold);
  word-break: break-word;
}

.page-about .about-cert__text {
  margin: 1.25rem 0 0;
  max-width: 62ch;
  font-size: var(--step-16);
  line-height: 1.9;
  color: var(--mist-gray);
}

.page-about .about-cert__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.9rem;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-reasons {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-cert__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-split {
    grid-template-columns: var(--about-aside-w) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4.5rem);
  }

  .page-about .about-split__aside {
    position: sticky;
    top: 6.5rem;
    align-self: start;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-about .about-quad {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-timeline {
    grid-auto-flow: row;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-timeline__item {
    padding: 2rem 1.1rem 1.5rem;
  }
}

@media (min-width: 1100px) {
  .page-about {
    --about-aside-w: 220px;
  }

  .page-about .about-cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-cats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-reasons {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-col,
  .page-about .about-cat {
    transition: none;
  }

  .page-about .about-col:hover,
  .page-about .about-cat:hover {
    transform: none;
  }
}