.page-about {
  --about-grid: 48px;
  --about-card-bg: rgba(26, 43, 74, 0.82);
  --about-glow: rgba(0, 255, 156, 0.14);
  background-color: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
}

.page-about a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about a:hover,
.page-about a:focus-visible {
  color: var(--color-accent);
  text-decoration: underline;
  outline: none;
}

.page-about .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-top: 1.25rem;
  font-family: var(--font-body);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--color-grid);
}

.page-about .breadcrumbs a {
  color: var(--color-text);
}

.page-about .breadcrumbs__sep {
  color: var(--color-border);
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  margin-top: 1rem;
  padding: 3rem 0 0;
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.page-about .about-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 15, 31, 0.55) 0%, rgba(10, 27, 51, 0.35) 50%, rgba(10, 27, 51, 0.96) 100%);
}

.page-about .about-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  object-position: center;
}

.page-about .about-hero__grid-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(58, 95, 143, 0.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(58, 95, 143, 0.16) 1px, transparent 1px);
  background-size: var(--about-grid) var(--about-grid);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding-top: 2.5rem;
  padding-bottom: 3.5rem;
}

.page-about .about-eyebrow {
  margin: 0 0 1rem;
  font-family: var(--font-data);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.page-about .about-hero h1 {
  margin: 0 0 1.25rem;
  font-family: var(--font-head);
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.page-about .about-hero__lead {
  max-width: 46rem;
  margin: 0 0 1.5rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(245, 240, 232, 0.86);
}

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

.page-about .about-hero__panel {
  position: relative;
  align-self: stretch;
  padding: 1.25rem 1.25rem 2rem;
  background: var(--about-card-bg);
  border: 1px solid var(--color-border);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  backdrop-filter: blur(4px);
}

.page-about .about-hero__panel::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 2.5rem;
  height: 3px;
  background: var(--color-accent);
}

.page-about .about-hero__panel-label {
  margin: 0 0 0.75rem;
  font-family: var(--font-data);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-grid);
}

.page-about .about-hero__panel dl {
  margin: 0;
}

.page-about .about-hero__panel-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(58, 95, 143, 0.5);
}

.page-about .about-hero__panel-row dt {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--color-grid);
}

.page-about .about-hero__panel-row dd {
  margin: 0;
  font-family: var(--font-data);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-text);
}

.page-about .about-status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 0.4rem;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 10px rgba(124, 138, 90, 0.7);
}

.page-about .about-hero__panel-coord {
  position: absolute;
  right: 0.75rem;
  bottom: 0.5rem;
  margin: 0;
  font-family: var(--font-data);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--color-border);
}

.page-about .about-hero__ticker {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.65rem 1.25rem;
  border-top: 1px solid var(--color-border);
  background: rgba(6, 15, 31, 0.78);
  font-family: var(--font-data);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-text);
  white-space: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-hero__ticker::-webkit-scrollbar {
  display: none;
}

.page-about .about-hero__ticker i {
  flex: 1 0 auto;
  width: 1.5rem;
  max-width: 2rem;
  height: 1px;
  background: var(--color-accent);
  opacity: 0.6;
}

.page-about .about-hero__ticker span:first-child {
  color: var(--color-accent);
}

/* ===== Section 通用 ===== */
.page-about .about-section {
  position: relative;
  padding: 3.5rem 0;
  border-bottom: 1px solid rgba(58, 95, 143, 0.4);
}

.page-about .about-section--alt {
  background:
    linear-gradient(135deg, rgba(6, 15, 31, 0.72) 0%, rgba(6, 15, 31, 0.2) 60%, rgba(6, 15, 31, 0.7) 100%),
    repeating-linear-gradient(0deg, rgba(58, 95, 143, 0.06) 0, rgba(58, 95, 143, 0.06) 1px, transparent 1px, transparent var(--about-grid));
}

.page-about .about-section__layout {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.page-about .about-section__aside {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.page-about .about-section__num {
  font-family: var(--font-data);
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--color-accent);
  text-shadow: 0 0 24px var(--about-glow);
}

.page-about .about-section__label {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-grid);
}

.page-about .about-section__body {
  flex: 1;
  min-width: 0;
}

.page-about .about-kicker {
  margin: 0 0 0.5rem;
  font-family: var(--font-data);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-warn);
  text-transform: uppercase;
}

.page-about .about-section__body h2 {
  margin: 0 0 1.5rem;
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3.4vw, 2.25rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.page-about .about-section__body p {
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(245, 240, 232, 0.84);
}

/* ===== 品牌故事 ===== */
.page-about .about-story__cols {
  display: grid;
  gap: 1rem;
  margin-bottom: 2rem;
}

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

.page-about .about-story__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.page-about .about-story__stat {
  position: relative;
  padding: 1rem 0.9rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.page-about .about-story__stat-num {
  display: block;
  font-family: var(--font-data);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  margin-bottom: 0.25rem;
}

.page-about .about-story__stat-label {
  display: block;
  font-family: var(--font-body);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--color-grid);
}

/* ===== 发展历程 ===== */
.page-about .about-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin: 2rem 0 1.5rem;
  padding-left: 1.4rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-border) 70%);
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1rem;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -1.4rem;
  top: 0.65rem;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 255, 156, 0.18), 0 0 12px rgba(0, 255, 156, 0.5);
}

.page-about .about-timeline__marker {
  font-family: var(--font-data);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text);
  padding-top: 0.35rem;
}

.page-about .about-timeline__card {
  padding: 1rem 1.1rem;
  background: var(--color-bg-card);
  border: 1px solid rgba(58, 95, 143, 0.7);
  border-left: 3px solid var(--color-accent);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-about .about-timeline__card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.page-about .about-timeline__card h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 0.82rem;
}

.page-about .about-milestones__media {
  margin-top: 1.5rem;
  border: 1px solid var(--color-border);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

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

/* ===== 资质认证 ===== */
.page-about .about-cert__grid {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.page-about .about-cert__card {
  position: relative;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .about-cert__card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 24px rgba(0, 255, 156, 0.1);
}

.page-about .about-cert__card summary {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-cert__glyph {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 4.5rem;
  height: 2.75rem;
  font-family: var(--font-data);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  background: rgba(0, 255, 156, 0.08);
  border: 1px solid rgba(0, 255, 156, 0.4);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}

.page-about .about-cert__summary-text {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.page-about .about-cert__summary-text strong {
  font-family: var(--font-head);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--color-text);
}

.page-about .about-cert__summary-text em {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-style: normal;
  color: var(--color-grid);
}

.page-about .about-cert__card > p {
  margin: 0;
  padding: 0 1.25rem 1.25rem;
  font-size: 0.84rem;
  border-top: 1px solid rgba(58, 95, 143, 0.5);
}

.page-about .about-cert__note {
  margin: 0;
  font-size: 0.8rem;
  color: var(--color-grid);
}

/* ===== 合作生态 ===== */
.page-about .about-eco__lead {
  max-width: 46rem;
  margin: 0 0 1.25rem;
}

.page-about .about-eco__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.75rem;
}

.page-about .about-eco__tags .tag {
  font-family: var(--font-data);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.45rem 0.85rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.page-about .about-eco__tags .tag--accent {
  color: var(--color-accent);
  border-color: rgba(0, 255, 156, 0.5);
}

.page-about .about-eco__chart-wrap {
  position: relative;
  margin-bottom: 1.75rem;
  padding: 1rem;
  background: rgba(6, 15, 31, 0.6);
  border: 1px solid rgba(58, 95, 143, 0.5);
}

.page-about .about-eco__chart-wrap::before {
  content: "DATA FLOW / 数据流架构";
  display: block;
  margin-bottom: 0.5rem;
  font-family: var(--font-data);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-grid);
}

.page-about .about-eco__chart {
  display: block;
  width: 100%;
  height: auto;
  max-height: 160px;
}

.page-about .about-eco__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid rgba(58, 95, 143, 0.5);
}

.page-about .about-eco__bottom p {
  flex: 1;
  min-width: 240px;
  margin: 0;
  font-size: 0.84rem;
}

/* ===== 团队画像 ===== */
.page-about .about-team__layout {
  display: grid;
  gap: 1.5rem;
}

.page-about .about-team__text > p {
  margin: 0 0 1rem;
}

.page-about .about-team__list {
  margin: 1.25rem 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__list li {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.65rem 0;
  font-family: var(--font-body);
  font-size: 0.84rem;
  color: rgba(245, 240, 232, 0.82);
  border-bottom: 1px dashed rgba(58, 95, 143, 0.55);
}

.page-about .about-team__list li span {
  flex: 0 0 6.5rem;
  font-family: var(--font-data);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-accent);
}

.page-about .about-team__contact {
  margin-top: 1.25rem;
  font-size: 0.82rem;
  color: var(--color-grid);
}

.page-about .about-team__media {
  border: 1px solid rgba(58, 95, 143, 0.6);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

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

/* ===== CTA ===== */
.page-about .about-cta {
  padding: 4rem 0;
  background:
    linear-gradient(180deg, rgba(0, 255, 156, 0.06) 0%, rgba(0, 255, 156, 0) 60%),
    var(--color-bg-deep);
}

.page-about .about-cta__inner {
  text-align: center;
}

.page-about .about-cta__inner h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-head);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-text);
}

.page-about .about-cta__inner p {
  max-width: 44rem;
  margin: 0 auto 1.5rem;
  font-size: 0.9rem;
  color: rgba(245, 240, 232, 0.78);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

/* ===== 桌面端 ===== */
@media (min-width: 900px) {
  .page-about .breadcrumbs {
    padding-top: 1.75rem;
  }

  .page-about .about-hero {
    padding-top: 2rem;
  }

  .page-about .about-hero__inner {
    display: grid;
    grid-template-columns: minmax(0, 3fr) minmax(260px, 2fr);
    gap: 3rem;
    align-items: end;
    padding-top: 4rem;
    padding-bottom: 5rem;
  }

  .page-about .about-hero h1 {
    font-size: clamp(2.6rem, 5vw, 4rem);
  }

  .page-about .about-hero__lead {
    font-size: 1.05rem;
  }

  .page-about .about-hero__panel {
    margin-bottom: 1rem;
  }

  .page-about .about-hero__ticker {
    gap: 1.5rem;
    padding: 0.75rem 0;
  }

  .page-about .about-hero__ticker i {
    width: 2.5rem;
  }

  .page-about .about-section {
    padding: 5rem 0;
  }

  .page-about .about-section__layout {
    display: grid;
    grid-template-columns: minmax(90px, 170px) minmax(0, 1fr);
    gap: 2.5rem;
  }

  .page-about .about-section__aside {
    position: sticky;
    top: calc(var(--header-total) + 2rem);
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .page-about .about-section__num {
    font-size: 3.4rem;
  }

  .page-about .about-section__label {
    font-size: 0.82rem;
  }

  .page-about .about-story__cols {
    grid-template-columns: 1fr 1fr;
    gap: 1.75rem;
    max-width: 52rem;
  }

  .page-about .about-story__stats {
    max-width: 42rem;
  }

  .page-about .about-timeline {
    gap: 1.5rem;
    margin-bottom: 2rem;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 4.5rem 1fr;
    gap: 1.5rem;
    max-width: 46rem;
  }

  .page-about .about-timeline__card {
    transition: transform 0.25s ease, border-color 0.25s ease;
  }

  .page-about .about-cert__grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    max-width: 52rem;
  }

  .page-about .about-cert__card summary {
    padding: 1.5rem;
  }

  .page-about .about-eco__chart-wrap {
    padding: 1.25rem;
  }

  .page-about .about-eco__chart {
    max-height: 180px;
  }

  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(260px, 0.9fr);
    gap: 2.5rem;
    align-items: start;
  }

  .page-about .about-team__media {
    margin-top: 0.5rem;
  }

  .page-about .about-cta {
    padding: 5rem 0;
  }
}

@media (min-width: 1200px) {
  .page-about .about-section__layout {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 3.5rem;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 5rem 1fr;
  }

  .page-about .about-story__cols {
    font-size: 0.95rem;
  }
}