.page-about {
  --about-purple-glow: rgba(108, 92, 231, 0.14);
  --about-orange-glow: rgba(255, 184, 77, 0.1);
  overflow-x: hidden;
  background: var(--bg-primary);
  color: var(--text-primary);
}

.page-about section {
  scroll-margin-top: calc(var(--header-height) + 16px);
}

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

/* ---------- 首页首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 48px 0 80px;
  overflow: hidden;
  border-bottom: 1px solid var(--border-subtle);
  background:
    radial-gradient(600px 360px at 82% 16%, var(--about-purple-glow), transparent 62%),
    radial-gradient(560px 260px at 18% 92%, var(--about-orange-glow), transparent 58%),
    linear-gradient(180deg, rgba(108, 92, 231, 0.08), rgba(11, 11, 18, 0) 100%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 40px;
}

.page-about .about-hero .breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 36px;
  font-family: var(--font-mono);
  font-size: 0.7813rem;
  color: var(--text-dim);
}

.page-about .about-hero .breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-about .about-hero .breadcrumbs a:hover {
  color: var(--accent-purple-light);
}

.page-about .about-hero__eyebrow {
  display: block;
  margin-bottom: 14px;
}

.page-about .about-hero h1 {
  margin: 0 0 12px;
  font-size: clamp(2.5rem, 6.5vw, 4.5rem);
  font-weight: var(--font-weight-black);
  letter-spacing: -0.03em;
  line-height: 1.04;
}

.page-about .about-hero__lead {
  margin: 0 0 20px;
  font-size: 1.125rem;
  font-weight: var(--font-weight-bold);
  color: var(--accent-orange);
  letter-spacing: 0.02em;
}

.page-about .about-hero__desc {
  max-width: 480px;
  margin: 0 0 32px;
  color: var(--text-muted);
  line-height: 1.8;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-hero__stat-value {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

.page-about .about-hero__stat-label {
  font-size: 0.8125rem;
  color: var(--text-dim);
}

.page-about .about-hero__frame {
  position: relative;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--bg-surface);
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(205deg, rgba(108, 92, 231, 0.22), transparent 48%, rgba(255, 184, 77, 0.06));
}

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

/* ---------- 理念区 ---------- */
.page-about .about-philosophy {
  padding: 88px 0;
}

.page-about .about-philosophy__grid {
  display: grid;
  gap: 48px;
}

.page-about .about-philosophy__aside {
  border-left: 2px solid var(--accent-purple);
  padding-left: 24px;
}

.page-about .about-philosophy__aside h2 {
  margin: 14px 0 16px;
  font-size: clamp(1.7rem, 3.8vw, 2.8rem);
  line-height: 1.2;
  font-weight: var(--font-weight-black);
}

.page-about .about-philosophy__note {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-about .about-philosophy__intro {
  margin: 0 0 48px;
  max-width: 660px;
  font-size: 1.125rem;
  line-height: 1.9;
  color: var(--text-muted);
}

.page-about .about-philosophy__principle {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 20px;
  padding: 28px 0;
  border-top: 1px solid var(--border-subtle);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.page-about .about-philosophy__principle:last-child {
  border-bottom: 1px solid var(--border-subtle);
}

.page-about .about-philosophy__num {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  letter-spacing: 0.08em;
  color: var(--accent-orange);
}

.page-about .about-philosophy__principle h3 {
  margin: 0 0 10px;
  font-size: 1.125rem;
  font-weight: var(--font-weight-bold);
}

.page-about .about-philosophy__principle p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

/* ---------- 时间线 ---------- */
.page-about .about-milestones {
  padding: 88px 0;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.page-about .about-milestones__head {
  display: grid;
  gap: 32px;
  margin-bottom: 64px;
}

.page-about .about-milestones__heading h2 {
  margin: 12px 0 12px;
  font-size: clamp(1.7rem, 3.8vw, 2.8rem);
  line-height: 1.2;
  font-weight: var(--font-weight-black);
}

.page-about .about-milestones__figure {
  margin: 0;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-primary);
}

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

.page-about .about-milestones__figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.page-about .about-milestones__track {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 48px;
}

.page-about .about-milestones__track::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 13px;
  width: 1px;
  background: var(--border-subtle);
}

.page-about .about-milestones__item {
  position: relative;
  padding-left: 48px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.page-about .about-milestones__dot {
  position: absolute;
  top: 0;
  left: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--accent-purple);
  background: var(--bg-primary);
  display: grid;
  place-items: center;
  color: var(--accent-purple);
  transition: background var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast);
}

.page-about .about-milestones__dot svg {
  width: 13px;
  height: 13px;
}

.page-about .about-milestones__item.visible .about-milestones__dot {
  background: var(--accent-purple);
  color: var(--text-primary);
  box-shadow: 0 0 0 6px rgba(108, 92, 231, 0.16);
}

.page-about .about-milestones__year {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--accent-orange);
}

.page-about .about-milestones__item h3 {
  margin: 8px 0 8px;
  font-size: 1.0625rem;
  font-weight: var(--font-weight-bold);
  line-height: 1.4;
}

.page-about .about-milestones__item p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

/* ---------- 数据区 ---------- */
.page-about .about-data {
  padding: 88px 0;
  background:
    radial-gradient(720px 360px at 18% 8%, rgba(108, 92, 231, 0.1), transparent 58%),
    var(--bg-primary);
}

.page-about .about-data__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 8px;
  padding: 20px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 88% 10%, var(--about-orange-glow), transparent 52%),
    radial-gradient(circle at 18% 0%, rgba(108, 92, 231, 0.14), transparent 55%),
    var(--bg-surface);
}

.page-about .about-data__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.page-about .about-data__value {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.02em;
  color: var(--accent-orange);
}

.page-about .about-data__label {
  font-size: 0.9375rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

.page-about .about-data__note {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-about .about-data__footer {
  margin: 24px 0 0;
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-dim);
}

.page-about .about-data__footer a {
  color: var(--accent-purple-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(139, 124, 248, 0.35);
  transition: border-color var(--transition-fast);
}

.page-about .about-data__footer a:hover {
  border-color: var(--accent-purple-light);
}

/* ---------- 资质区 ---------- */
.page-about .about-honors {
  padding: 88px 0;
}

.page-about .about-honors__list {
  display: grid;
  gap: 16px;
}

.page-about .about-honor {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 20px;
  padding: 24px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.page-about .about-honor:hover {
  transform: translateY(-4px);
  border-color: rgba(108, 92, 231, 0.55);
  box-shadow: var(--shadow-md);
}

.page-about .about-honor__icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(108, 92, 231, 0.4);
  background: rgba(108, 92, 231, 0.08);
  display: grid;
  place-items: center;
  color: var(--accent-purple-light);
}

.page-about .about-honor__icon svg {
  width: 18px;
  height: 18px;
}

.page-about .about-honor__body h3 {
  margin: 0 0 8px;
  font-size: 1.0625rem;
  font-weight: var(--font-weight-bold);
}

.page-about .about-honor__body p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9063rem;
  line-height: 1.7;
}

.page-about .about-honor__tag {
  display: none;
}

.page-about .about-honors__extra {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 24px;
  padding: 24px;
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-lg);
}

.page-about .about-honors__extra p {
  margin: 0;
  max-width: 700px;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-about .about-honors__extra strong {
  color: var(--text-primary);
}

/* ---------- 生态区 ---------- */
.page-about .about-ecosystem {
  padding: 88px 0;
  border-top: 1px solid var(--border-subtle);
  background:
    radial-gradient(640px 320px at 78% 24%, var(--about-purple-glow), transparent 60%),
    var(--bg-primary);
}

.page-about .about-ecosystem__hero {
  display: grid;
  gap: 48px;
}

.page-about .about-ecosystem__content h2 {
  margin: 12px 0 16px;
  font-size: clamp(1.7rem, 3.8vw, 2.8rem);
  line-height: 1.2;
  font-weight: var(--font-weight-black);
}

.page-about .about-ecosystem__content > p {
  margin: 0;
  max-width: 600px;
  color: var(--text-muted);
  line-height: 1.8;
}

.page-about .about-ecosystem__points {
  list-style: none;
  margin: 24px 0 32px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-ecosystem__points li {
  position: relative;
  padding-left: 24px;
  color: var(--text-muted);
  line-height: 1.7;
}

.page-about .about-ecosystem__points li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.58em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-orange);
}

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

.page-about .about-ecosystem__frame {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--bg-surface);
  box-shadow: var(--shadow-lg);
}

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

.page-about .about-ecosystem__partners {
  display: grid;
  gap: 16px;
  margin-top: 64px;
}

.page-about .partner-card {
  position: relative;
  min-height: 200px;
  padding: 28px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  overflow: hidden;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.page-about .partner-card:hover {
  transform: translateY(-6px);
  border-color: rgba(108, 92, 231, 0.6);
  box-shadow: var(--shadow-md);
}

.page-about .partner-card__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--accent-purple-light);
}

.page-about .partner-card h3 {
  margin: 12px 0 8px;
  font-size: 1.125rem;
  font-weight: var(--font-weight-bold);
}

.page-about .partner-card > p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

.page-about .partner-card__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  padding: 28px;
  background: rgba(35, 35, 48, 0.96);
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.7;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.page-about .partner-card:hover .partner-card__overlay {
  opacity: 1;
}

.page-about .partner-card__overlay p {
  margin: 0;
}

@media (hover: none) {
  .page-about .partner-card__overlay {
    display: none;
  }
}

/* ---------- 桌面端布局 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 72px 0 112px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: 5fr 7fr;
    gap: 64px;
    align-items: center;
  }

  .page-about .about-hero__desc {
    margin-bottom: 40px;
  }

  .page-about .about-philosophy {
    padding: 112px 0;
  }

  .page-about .about-philosophy__grid {
    grid-template-columns: 5fr 7fr;
    gap: 80px;
  }

  .page-about .about-milestones {
    padding: 112px 0;
  }

  .page-about .about-milestones__head {
    grid-template-columns: 1fr 400px;
    align-items: end;
    gap: 64px;
    margin-bottom: 88px;
  }

  .page-about .about-milestones__track {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .about-milestones__track::before {
    top: 13px;
    bottom: auto;
    left: 13px;
    right: 13px;
    width: auto;
  }

  .page-about .about-milestones__item {
    padding-left: 0;
    padding-top: 56px;
    text-align: center;
  }

  .page-about .about-milestones__dot {
    left: 50%;
    right: auto;
    top: 0;
    transform: translateX(-50%);
  }

  .page-about .about-milestones__item p {
    max-width: none;
  }

  .page-about .about-data {
    padding: 112px 0;
  }

  .page-about .about-data__grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
    padding: 48px 36px;
  }

  .page-about .about-data__item {
    padding: 8px 28px;
  }

  .page-about .about-data__item + .about-data__item {
    border-left: 1px solid var(--border-subtle);
  }

  .page-about .about-honors {
    padding: 112px 0;
  }

  .page-about .about-honor {
    grid-template-columns: 48px 1fr auto;
    align-items: center;
    padding: 28px 32px;
  }

  .page-about .about-honor__tag {
    display: inline-block;
  }

  .page-about .about-ecosystem {
    padding: 112px 0;
  }

  .page-about .about-ecosystem__hero {
    grid-template-columns: 5fr 7fr;
    gap: 72px;
    align-items: center;
  }

  .page-about .about-ecosystem__partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    margin-top: 88px;
  }
}