.page-about {
  --about-accent: #7B2FFF;
  --about-neon: #39FF14;
  --about-line: rgba(123, 47, 255, 0.4);
  --about-card-bg: rgba(18, 21, 28, 0.72);
  background: var(--color-primary);
  color: var(--color-text);
  overflow-x: clip;
}

.page-about .container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 40px);
}

/* 面包屑 */
.page-about .breadcrumb {
  padding-block: 24px;
  border-bottom: 1px solid var(--color-border);
}
.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .breadcrumb__link {
  color: var(--color-muted);
  text-decoration: none;
  font-family: var(--font-data);
  font-size: 0.82rem;
  transition: color 0.25s ease;
}
.page-about .breadcrumb__link:hover {
  color: var(--color-neon);
}
.page-about .breadcrumb__item:last-child {
  color: var(--color-text);
  font-family: var(--font-data);
  font-size: 0.82rem;
}
.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--color-muted);
}

/* 品牌愿景 */
.page-about .about-hero {
  position: relative;
  padding: 72px 0 88px;
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(150deg, rgba(123, 47, 255, 0.2) 0%, transparent 52%),
    radial-gradient(circle at 88% 22%, rgba(57, 255, 20, 0.08) 0%, transparent 42%);
  pointer-events: none;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(46%, 480px);
  aspect-ratio: 1 / 1.4;
  background:
    linear-gradient(120deg, transparent 60%, rgba(123, 47, 255, 0.22)),
    repeating-linear-gradient(135deg, rgba(57, 255, 20, 0.06) 0 1px, transparent 1px 10px);
  clip-path: polygon(22% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 48px;
}
.page-about .about-hero__title {
  margin: 20px 0 20px;
  font-size: clamp(2.6rem, 7vw, 5.4rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 900;
  background: linear-gradient(180deg, var(--color-text) 0%, var(--color-text) 70%, rgba(242, 239, 233, 0.6) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.page-about .about-hero__lead {
  max-width: 680px;
  margin: 0 0 16px;
  font-size: clamp(1.15rem, 2.4vw, 1.7rem);
  font-weight: 500;
  line-height: 1.5;
}
.page-about .about-hero__body {
  max-width: 620px;
  margin: 0;
  color: var(--color-muted);
  font-size: 1rem;
  line-height: 1.9;
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}
.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.page-about .about-hero__fact {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 16px;
  background: var(--about-card-bg);
  backdrop-filter: blur(6px);
}
.page-about .about-hero__num {
  color: var(--color-neon);
  font-size: clamp(1.4rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
}
.page-about .about-hero__label {
  color: var(--color-muted);
  font-size: 0.85rem;
}

/* 发展历程 */
.page-about .about-timeline {
  position: relative;
  padding: 72px 0;
  border-top: 1px solid var(--color-border);
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  height: 2px;
  width: 42%;
  background: var(--gradient-primary);
}
.page-about .about-timeline__grid {
  display: grid;
  gap: 48px;
  align-items: start;
}
.page-about .about-timeline__intro {
  max-width: 620px;
}
.page-about .about-timeline__intro .section-title,
.page-about .about-capability__head .section-title,
.page-about .about-credentials__head .section-title,
.page-about .about-ecosystem__copy .section-title {
  margin: 12px 0 12px;
  font-size: clamp(1.8rem, 3.6vw, 3rem);
  line-height: 1.2;
}
.page-about .about-timeline__intro p,
.page-about .about-ecosystem__copy p {
  margin: 0 0 16px;
  color: var(--color-muted);
  line-height: 1.9;
  font-size: 0.95rem;
}
.page-about .about-timeline__intro .btn {
  margin-top: 8px;
}
.page-about .about-timeline__deco {
  display: none;
}
.page-about .about-timeline__scroll {
  display: grid;
  gap: 40px;
}
.page-about .about-timeline__media {
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.page-about .about-timeline__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .about-timeline__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(123, 47, 255, 0.16) 0%, transparent 42%, rgba(57, 255, 20, 0.06) 100%);
  pointer-events: none;
}
.page-about .about-timeline__list {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-timeline__item {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 0 0 40px 36px;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 18px var(--about-accent);
}
.page-about .about-timeline__item:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 20px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--about-accent) 0%, var(--color-border) 85%);
}
.page-about .about-timeline__date {
  color: var(--color-neon);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.page-about .about-timeline__item h3 {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 700;
}
.page-about .about-timeline__item p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.94rem;
  line-height: 1.85;
}

/* 数据能力与团队 */
.page-about .about-capability {
  position: relative;
  padding: 72px 0;
  border-top: 1px solid var(--color-border);
}
.page-about .about-capability::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(38%, 360px);
  height: 260px;
  background: radial-gradient(circle, rgba(123, 47, 255, 0.14) 0%, transparent 68%);
  pointer-events: none;
}
.page-about .about-capability__head,
.page-about .about-credentials__head {
  display: grid;
  gap: 8px;
  margin-bottom: 44px;
}
.page-about .about-capability__head .section-sub,
.page-about .about-credentials__head .section-sub {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.95rem;
  line-height: 1.8;
  max-width: 620px;
}
.page-about .about-capability__main {
  display: grid;
  gap: 40px;
  align-items: center;
}
.page-about .about-capability__map {
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.page-about .about-capability__map img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .about-capability__map::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(123, 47, 255, 0.14) 0%, transparent 42%),
    repeating-linear-gradient(90deg, rgba(57, 255, 20, 0.08) 0 1px, transparent 1px 8px);
  mix-blend-mode: screen;
  pointer-events: none;
}
.page-about .about-capability__panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 28px;
  background: var(--about-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(6px);
}
.page-about .about-capability__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}
.page-about .tab-btn {
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 18px;
  color: var(--color-muted);
  font-family: var(--font-body);
  font-size: 0.9rem;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}
.page-about .tab-btn:hover {
  color: var(--color-text);
  border-color: var(--color-accent);
}
.page-about .tab-btn.is-active {
  color: var(--color-primary);
  background: var(--color-neon);
  border-color: var(--color-neon);
  font-weight: 700;
}
.page-about .tab-panel[hidden] {
  display: none;
}
.page-about .about-capability__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 0;
}
.page-about .about-capability__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px;
  background: rgba(10, 17, 40, 0.5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.page-about .about-capability__stat dt {
  color: var(--color-muted);
  font-size: 0.84rem;
}
.page-about .about-capability__stat dd {
  margin: 0;
  color: var(--color-neon);
  font-size: 1.9rem;
  font-weight: 800;
  line-height: 1.1;
}
.page-about .about-capability__note {
  border-left: 2px solid var(--color-accent);
  padding-left: 18px;
}
.page-about .about-capability__note h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}
.page-about .about-capability__note p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.94rem;
  line-height: 1.85;
}
.page-about .about-capability__team {
  display: grid;
  gap: 36px;
  margin-top: 48px;
  align-items: center;
}
.page-about .about-capability__team-img {
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.page-about .about-capability__team-img img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .about-capability__team-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 58%, rgba(57, 255, 20, 0.07) 100%);
  pointer-events: none;
}
.page-about .about-capability__team-copy h3 {
  margin: 0 0 14px;
  font-size: 1.5rem;
  line-height: 1.4;
}
.page-about .about-capability__team-copy p {
  margin: 0 0 16px;
  color: var(--color-muted);
  font-size: 0.96rem;
  line-height: 1.9;
}
.page-about .about-capability__team-copy .btn {
  margin-top: 8px;
}

/* 资质与荣誉 */
.page-about .about-credentials {
  padding: 72px 0;
  background: var(--color-surface);
  border-block: 1px solid var(--color-border);
}
.page-about .about-credentials__grid {
  display: grid;
  gap: 20px;
}
.page-about .about-credentials__card {
  position: relative;
  padding: 28px;
  background: rgba(10, 17, 40, 0.45);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.page-about .about-credentials__card:hover {
  border-color: var(--about-accent);
  transform: translateY(-4px);
}
.page-about .about-credentials__card::after {
  content: attr(data-index);
  position: absolute;
  right: 10px;
  bottom: -18px;
  font-family: var(--font-data);
  font-size: 6rem;
  font-weight: 800;
  color: rgba(242, 239, 233, 0.04);
  line-height: 1;
  pointer-events: none;
  user-select: none;
}
.page-about .about-credentials__card h3 {
  margin: 14px 0 8px;
  font-size: 1.4rem;
}
.page-about .about-credentials__card p {
  margin: 0;
  max-width: 480px;
  color: var(--color-muted);
  font-size: 0.95rem;
  line-height: 1.85;
}

/* 合作生态 */
.page-about .about-ecosystem {
  position: relative;
  padding: 72px 0;
  overflow: hidden;
}
.page-about .about-ecosystem::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 18% 72%, rgba(57, 255, 20, 0.09) 0%, transparent 55%),
    linear-gradient(90deg, transparent 60%, rgba(123, 47, 255, 0.12) 100%);
  pointer-events: none;
}
.page-about .about-ecosystem__inner {
  position: relative;
  display: grid;
  gap: 40px;
  align-items: center;
}
.page-about .about-ecosystem__copy {
  max-width: 680px;
}
.page-about .about-ecosystem__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}
.page-about .about-ecosystem__facts {
  display: grid;
  gap: 16px;
}
.page-about .about-ecosystem__fact {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px;
  background: var(--about-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(6px);
}
.page-about .about-ecosystem__fact span:first-child {
  color: var(--color-neon);
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1;
}
.page-about .about-ecosystem__fact span:last-child {
  color: var(--color-muted);
  font-size: 0.94rem;
}

/* 章节编号 */
.page-about .chapter__num {
  display: inline-block;
  font-family: var(--font-data);
  font-size: clamp(3rem, 6vw, 4.8rem);
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--about-accent);
  user-select: none;
}

/* 桌面端布局 */
@media (min-width: 920px) {
  .page-about .about-hero {
    padding: 96px 0 120px;
  }
  .page-about .about-hero__inner {
    grid-template-columns: 1.35fr 0.65fr;
    align-items: end;
  }
  .page-about .about-hero__facts {
    grid-template-columns: 1fr;
    gap: 1px;
  }
  .page-about .about-hero__fact {
    padding: 26px 24px;
  }
  .page-about .about-timeline__grid {
    grid-template-columns: 0.8fr 1.2fr;
    gap: 72px;
  }
  .page-about .about-timeline__intro {
    position: sticky;
    top: 32px;
  }
  .page-about .about-timeline__deco {
    display: block;
    width: min(100%, 400px);
    margin-top: 28px;
    overflow: visible;
  }
  .page-about .about-timeline__scroll {
    grid-template-columns: 0.62fr 1fr;
    gap: 48px;
    align-items: start;
  }
  .page-about .about-timeline__media {
    position: sticky;
    top: 32px;
  }
  .page-about .about-capability__main {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
  }
  .page-about .about-capability__team {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 64px;
  }
  .page-about .about-credentials__grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
  .page-about .about-ecosystem__inner {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 64px;
  }
}

@media (min-width: 1240px) {
  .page-about .about-timeline__scroll {
    grid-template-columns: 0.5fr 1fr;
    gap: 64px;
  }
  .page-about .about-timeline__media {
    min-width: 320px;
  }
  .page-about .about-capability__panel {
    padding: 36px;
  }
}