.page-about {
  --local-space: var(--c-space);
  position: relative;
  overflow-x: hidden;
  background:
    radial-gradient(rgba(0, 230, 118, 0.05) 1px, transparent 1px) 0 0 / 28px 28px,
    var(--c-space);
  color: var(--t-body);
}

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

.page-about .breadcrumb {
  padding-top: 1.25rem;
}

.page-about .section-index {
  color: var(--c-neon);
  font-family: var(--f-display);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0 0 0.6rem;
}

.page-about .section-title {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  line-height: 1.1;
  color: var(--t-heading);
  margin: 0 0 0.6rem;
}

.page-about .section-desc {
  color: var(--t-muted);
  font-size: 1.0625rem;
  line-height: 1.6;
  max-width: 620px;
  margin: 0;
}

/* ===== Hero ===== */
.page-about .about-hero {
  padding: 3rem 0 0;
}

.page-about .about-hero-layout {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-about .about-hero-copy .section-index {
  font-size: 0.8rem;
}

.page-about .about-hero-copy h1 {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  line-height: 1.06;
  color: var(--t-heading);
  margin: 0 0 1.25rem;
  text-wrap: balance;
}

.page-about .about-hero-lead {
  font-size: 1.25rem;
  line-height: 1.65;
  color: var(--t-body);
  margin: 0 0 1rem;
  max-width: 34em;
}

.page-about .about-hero-desc {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--t-muted);
  margin: 0 0 1.5rem;
  max-width: 34em;
}

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

.page-about .about-hero-map {
  position: relative;
  border-radius: var(--r-l);
  background: rgba(27, 42, 74, 0.55);
  border: var(--line-dim);
  overflow: hidden;
  min-height: 260px;
}

.page-about .about-hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 230, 118, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 230, 118, 0.07) 1px, transparent 1px);
  background-size: 28px 28px;
}

.page-about .about-hero-svg {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  min-height: 260px;
}

.page-about .about-hero-chip {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(10, 22, 40, 0.85);
  border: 1px solid rgba(0, 230, 118, 0.4);
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  color: var(--c-neon);
  font-family: var(--f-data);
  font-size: 0.75rem;
}

.page-about .about-chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-neon);
  box-shadow: 0 0 0 3px rgba(0, 230, 118, 0.2);
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-top: 2.5rem;
}

.page-about .about-stat {
  background: rgba(27, 42, 74, 0.7);
  border: var(--line-dim);
  border-radius: var(--r-m);
  padding: 1.1rem 1rem;
  transition: border-color var(--speed) var(--ease), transform var(--speed) var(--ease);
}

.page-about .about-stat:hover {
  border-color: rgba(0, 230, 118, 0.4);
  transform: translateY(-2px);
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: 2rem;
  color: var(--c-neon);
  line-height: 1.15;
}

.page-about .about-stat-label {
  font-size: 0.875rem;
  color: var(--t-muted);
}

/* ===== Concept ===== */
.page-about .about-concept,
.page-about .about-milestones,
.page-about .about-capability,
.page-about .about-team,
.page-about .about-credentials {
  padding: var(--space-section) 0;
}

.page-about .about-concept-head,
.page-about .about-milestones-head,
.page-about .about-capability-head,
.page-about .about-team-head,
.page-about .about-credentials-head {
  margin-bottom: 2.5rem;
}

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

.page-about .about-concept-card {
  background: rgba(27, 42, 74, 0.75);
  border: var(--line-dim);
  border-radius: var(--r-l);
  padding: 1.75rem 1.5rem;
  position: relative;
  overflow: hidden;
  transition: border-color var(--speed) var(--ease), transform var(--speed) var(--ease);
}

.page-about .about-concept-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  background: linear-gradient(90deg, var(--c-neon), transparent);
  opacity: 0.5;
}

.page-about .about-concept-card:hover {
  border-color: rgba(0, 230, 118, 0.45);
  transform: translateY(-3px);
}

.page-about .about-concept-main {
  background:
    linear-gradient(135deg, rgba(0, 230, 118, 0.08), transparent 50%),
    rgba(27, 42, 74, 0.85);
  border: var(--line-neon);
}

.page-about .about-concept-coord {
  display: inline-block;
  font-family: var(--f-data);
  font-size: 0.78rem;
  color: var(--c-neon);
  border: 1px solid rgba(0, 230, 118, 0.3);
  border-radius: var(--r-s);
  padding: 0.15rem 0.5rem;
  margin-bottom: 0.9rem;
  letter-spacing: 0.06em;
}

.page-about .about-concept-card h3 {
  font-family: var(--f-display);
  font-size: 1.35rem;
  color: var(--t-heading);
  margin: 0 0 0.6rem;
}

.page-about .about-concept-card p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--t-body);
  margin: 0 0 0.75rem;
}

.page-about .about-concept-card p:last-child {
  margin-bottom: 0;
}

.page-about .about-face-shape {
  display: block;
  width: 100%;
  height: 36px;
  margin-top: 2.5rem;
}

/* ===== Milestones ===== */
.page-about .about-milestones {
  background-image:
    linear-gradient(rgba(0, 230, 118, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 230, 118, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
}

.page-about .about-timeline {
  position: relative;
}

.page-about .about-timeline-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--f-data);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-slate);
  margin-bottom: 1.25rem;
}

.page-about .about-timeline-label::after {
  content: "";
  height: 1px;
  flex: 1;
  background: var(--line-dim);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0.5rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--c-neon) 60%, transparent 60%);
  background-size: 2px 8px;
}

.page-about .about-milestone {
  position: relative;
  padding-left: 2.25rem;
  margin-bottom: 1.75rem;
}

.page-about .about-milestone::after {
  content: "";
  position: absolute;
  top: 1.05rem;
  left: 0.1875rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: var(--c-space);
  border: 3px solid var(--c-neon);
  box-sizing: border-box;
  box-shadow: 0 0 0 4px rgba(0, 230, 118, 0.15);
}

.page-about .about-milestone-card {
  background: rgba(27, 42, 74, 0.8);
  border: var(--line-dim);
  border-radius: var(--r-m);
  padding: 1.25rem 1.25rem 1.5rem;
  transition: border-color var(--speed) var(--ease), transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}

.page-about .about-milestone:hover .about-milestone-card,
.page-about .about-milestone:focus-within .about-milestone-card {
  border-color: rgba(0, 230, 118, 0.55);
  transform: translateX(4px);
  box-shadow: var(--sh-card);
}

.page-about .about-milestone-coord {
  display: inline-block;
  font-family: var(--f-data);
  font-size: 0.8rem;
  color: var(--c-neon);
  background: rgba(0, 230, 118, 0.08);
  border: 1px solid rgba(0, 230, 118, 0.25);
  border-radius: var(--r-s);
  padding: 0.1rem 0.5rem;
  margin-bottom: 0.6rem;
  letter-spacing: 0.04em;
}

.page-about .about-milestone-card h3 {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--t-heading);
  margin: 0 0 0.5rem;
}

.page-about .about-milestone-card p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--t-body);
  margin: 0;
}

.page-about .about-milestone-visual {
  margin: 3rem 0 0;
  border-radius: var(--r-l);
  overflow: hidden;
  background: var(--c-night);
  border: var(--line-dim);
}

.page-about .about-milestone-visual img {
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 5 / 3;
}

.page-about .about-milestone-visual figcaption {
  padding: 0.9rem 1.25rem;
  font-size: 0.825rem;
  color: var(--t-muted);
  font-family: var(--f-data);
  border-top: 1px solid rgba(141, 153, 174, 0.18);
}

/* ===== Capability ===== */
.page-about .about-capability-grid {
  display: grid;
  gap: 1.25rem;
}

.page-about .about-capability-wide {
  background:
    linear-gradient(120deg, rgba(0, 230, 118, 0.07), transparent 40%),
    rgba(27, 42, 74, 0.9);
}

.page-about .about-capability-wide h3,
.page-about .about-capability-card h3 {
  font-family: var(--f-display);
  font-size: 1.3rem;
  color: var(--t-heading);
  margin: 0.75rem 0 0.5rem;
  line-height: 1.25;
}

.page-about .about-capability-wide p,
.page-about .about-capability-card p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--t-body);
  margin-bottom: 0.75rem;
}

.page-about .about-capability-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.25rem 0 0.5rem;
}

.page-about .about-rank-list {
  display: grid;
  gap: 0.5rem;
  margin: 1rem 0 0.25rem;
}

.page-about .about-rank-list div {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.45rem 0;
  border-bottom: 1px dashed rgba(141, 153, 174, 0.25);
  font-size: 0.9rem;
}

.page-about .about-rank-list dt {
  color: var(--c-neon);
  font-family: var(--f-data);
  font-size: 0.82rem;
  white-space: nowrap;
}

.page-about .about-rank-list dd {
  margin: 0;
  color: var(--t-body);
  text-align: right;
}

.page-about .about-league-switch {
  margin-top: 1.25rem;
  border-top: 1px solid rgba(141, 153, 174, 0.22);
  padding-top: 1rem;
}

.page-about .about-league-switch summary {
  cursor: pointer;
  color: var(--c-neon);
  font-size: 0.9rem;
  font-weight: 500;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

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

.page-about .about-league-switch summary::before {
  content: "+";
  font-family: var(--f-data);
  color: var(--c-ember);
  font-size: 1.1rem;
  line-height: 1;
}

.page-about .about-league-switch[open] summary::before {
  content: "–";
}

.page-about .about-league-panel {
  display: grid;
  gap: 0.75rem;
  margin-top: 0.75rem;
  padding: 1rem;
  background: rgba(10, 22, 40, 0.55);
  border-radius: var(--r-m);
}

.page-about .about-league-panel p {
  font-size: 0.9rem;
  color: var(--t-body);
  margin: 0;
}

/* ===== Team & Culture ===== */
.page-about .about-team-layout {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-about .about-team-copy p {
  color: var(--t-body);
  line-height: 1.75;
  margin-bottom: 1rem;
}

.page-about .about-team-copy blockquote {
  margin: 1.5rem 0;
  padding: 0.75rem 1rem 0.75rem 1.25rem;
  border-left: 3px solid var(--c-ember);
  background: rgba(255, 109, 0, 0.06);
  color: var(--t-body);
  font-size: 1rem;
}

.page-about .about-team-points {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-about .about-team-points li {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  font-size: 0.95rem;
  color: var(--t-body);
}

.page-about .about-team-figure {
  margin: 0;
  border-radius: 24px 4px 24px 4px;
  overflow: hidden;
  border: var(--line-dim);
  background: var(--c-night);
}

.page-about .about-team-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .about-team-figure figcaption {
  padding: 0.85rem 1.1rem;
  font-family: var(--f-data);
  font-size: 0.8rem;
  color: var(--t-muted);
  background: rgba(10, 22, 40, 0.85);
}

.page-about .about-culture-band {
  display: grid;
  gap: 0;
  margin-top: 2.5rem;
  border-radius: var(--r-l);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(255, 109, 0, 0.18), rgba(230, 57, 70, 0.12)), var(--c-night);
  border: var(--line-ember);
}

.page-about .about-culture-text {
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.page-about .about-culture-label {
  font-family: var(--f-data);
  color: var(--c-ember);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.page-about .about-culture-text p:last-child {
  color: var(--t-body);
  line-height: 1.75;
  margin: 0;
}

.page-about .about-culture-figure {
  margin: 0;
}

.page-about .about-culture-figure img {
  width: 100%;
  height: 100%;
  min-height: 260px;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

/* ===== Credentials ===== */
.page-about .about-cred-grid {
  display: grid;
  gap: 1.25rem;
}

.page-about .about-cred-card {
  background: rgba(27, 42, 74, 0.8);
  border: var(--line-dim);
  border-radius: var(--r-l);
  padding: 1.75rem 1.5rem;
  position: relative;
  transition: border-color var(--speed) var(--ease), transform var(--speed) var(--ease);
}

.page-about .about-cred-card:hover {
  border-color: rgba(0, 230, 118, 0.4);
  transform: translateY(-4px);
}

.page-about .about-cred-card:nth-child(2) {
  border-color: rgba(255, 109, 0, 0.35);
}

.page-about .about-cred-card:nth-child(3) {
  border-color: rgba(230, 57, 70, 0.28);
}

.page-about .about-cred-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.25rem;
  height: 3.25rem;
  border-radius: var(--r-m);
  background: rgba(0, 230, 118, 0.1);
  border: var(--line-neon);
  color: var(--c-neon);
  font-family: var(--f-display);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .about-cred-card:nth-child(2) .about-cred-icon {
  border-color: rgba(255, 109, 0, 0.4);
  color: var(--c-ember);
  background: rgba(255, 109, 0, 0.1);
}

.page-about .about-cred-card:nth-child(3) .about-cred-icon {
  border-color: rgba(230, 57, 70, 0.4);
  color: var(--c-chili);
  background: rgba(230, 57, 70, 0.1);
}

.page-about .about-cred-card h3 {
  font-family: var(--f-display);
  font-size: 1.2rem;
  color: var(--t-heading);
  margin: 1rem 0 0.5rem;
}

.page-about .about-cred-card p {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--t-body);
  margin: 0;
}

.page-about .about-cred-foot {
  margin-top: 1.25rem;
  color: var(--t-muted);
  font-size: 0.875rem;
  text-align: center;
  font-family: var(--f-data);
}

.page-about .about-cred-foot:first-of-type {
  margin-top: 2.25rem;
}

/* ===== 媒体查询 ===== */
@media (min-width: 700px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
  }

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

  .page-about .about-concept-main {
    grid-column: 1 / -1;
  }

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

  .page-about .about-capability-wide {
    grid-column: span 3;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero-layout {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 3rem;
  }

  .page-about .about-concept-grid {
    grid-template-columns: repeat(12, 1fr);
  }

  .page-about .about-concept-main {
    grid-column: span 5;
  }

  .page-about .about-concept-card:nth-of-type(2) {
    grid-column: span 3;
  }

  .page-about .about-concept-card:nth-of-type(3) {
    grid-column: span 4;
  }

  .page-about .about-timeline {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 0;
    row-gap: 2rem;
  }

  .page-about .about-timeline-label {
    grid-column: 1 / -1;
  }

  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .about-milestone {
    margin-bottom: 0;
    padding-left: 0;
  }

  .page-about .about-milestone:nth-of-type(odd) {
    grid-column: 1;
    padding-right: 2.75rem;
    text-align: right;
  }

  .page-about .about-milestone:nth-of-type(even) {
    grid-column: 2;
    padding-left: 2.75rem;
  }

  .page-about .about-milestone:nth-of-type(odd)::after {
    left: auto;
    right: -0.4375rem;
  }

  .page-about .about-milestone:nth-of-type(even)::after {
    left: -0.4375rem;
  }

  .page-about .about-milestone:hover .about-milestone-card,
  .page-about .about-milestone:focus-within .about-milestone-card {
    transform: translateY(-4px);
  }

  .page-about .about-capability-grid {
    grid-template-columns: repeat(12, 1fr);
  }

  .page-about .about-capability-wide {
    grid-column: span 12;
  }

  .page-about .about-capability-card {
    grid-column: span 4;
  }

  .page-about .about-team-layout {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }

  .page-about .about-culture-band {
    grid-template-columns: 1fr 1.2fr;
    margin-top: 3.5rem;
  }
}