.page-about {
  --about-rule: rgba(168, 196, 224, 0.16);
  --about-rule-strong: rgba(168, 196, 224, 0.32);
  --about-cyan-soft: rgba(43, 240, 210, 0.14);
  --about-amber-soft: rgba(255, 178, 91, 0.16);
  position: relative;
  padding-bottom: 72px;
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: 26px;
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--text-soft);
}

.page-about .breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  color: var(--about-rule-strong);
}

.page-about .breadcrumbs a {
  color: var(--text-soft);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--cyan);
}

.page-about .breadcrumbs [aria-current="page"] {
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 38px 0 56px;
  position: relative;
}

.page-about .about-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
}

.page-about .about-hero h1 {
  margin: 14px 0 22px;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 7vw, 4rem);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--text);
  max-width: 16em;
}

.page-about .about-hero h1 em {
  display: block;
  font-style: normal;
  color: var(--cyan);
  text-shadow: 0 0 32px rgba(43, 240, 210, 0.28);
}

.page-about .about-lede {
  margin: 0;
  max-width: 34em;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: var(--text-soft);
}

.page-about .about-facts {
  display: grid;
  gap: 14px;
  padding-top: 20px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-fact {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-fact-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-fact-num small {
  font-size: 0.62em;
  margin-left: 2px;
  color: var(--text-soft);
}

.page-about .about-fact-label {
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  color: var(--text-soft);
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  padding: 56px 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-section-head {
  max-width: 44em;
  margin-bottom: 30px;
}

.page-about .about-section-head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 4.2vw, 2.4rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.025em;
  color: var(--text);
}

.page-about .about-sub {
  margin: 14px 0 0;
  font-size: 0.98rem;
  line-height: 1.78;
  color: var(--text-soft);
}

/* ---------- 我们是谁 ---------- */
.page-about .about-prose {
  display: grid;
  gap: 18px;
  max-width: 42em;
}

.page-about .about-prose p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.82;
  color: var(--text-soft);
}

.page-about .about-prose p:first-of-type::first-letter {
  float: left;
  padding: 6px 10px 0 0;
  font-size: 2.9rem;
  font-weight: 900;
  line-height: 0.86;
  color: var(--amber);
}

.page-about .about-pull {
  margin: 30px 0 0;
  padding: 4px 0 4px 20px;
  max-width: 34em;
  border-left: 2px solid var(--amber);
  font-size: 1.03rem;
  line-height: 1.72;
  color: var(--text);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  padding: 56px 0 40px;
  border-top: 1px solid var(--about-rule);
  overflow: hidden;
}

.page-about .about-timeline > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-timeline-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  filter: saturate(0.4);
  pointer-events: none;
}

.page-about .tl-track {
  position: relative;
  margin: 8px 0 0;
  padding: 0 0 0 0;
  list-style: none;
}

.page-about .tl-track::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 24px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(43, 240, 210, 0.12) 100%);
}

.page-about .tl-node {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 0 0 40px 26px;
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px var(--about-amber-soft);
}

.page-about .tl-node:last-child {
  padding-bottom: 8px;
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .tl-body h3 {
  margin: 0 0 10px;
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .tl-body p {
  margin: 0;
  max-width: 40em;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--text-soft);
}

/* ---------- 六个栏目 ---------- */
.page-about .six-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .six-item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .six-item:last-child {
  border-bottom: 1px solid var(--about-rule);
}

.page-about .six-num {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.1;
  color: transparent;
  -webkit-text-stroke: 1px var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .six-body h3 {
  margin: 0 0 6px;
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--text);
}

.page-about .six-body p {
  margin: 0;
  max-width: 38em;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-soft);
}

/* ---------- 团队 ---------- */
.page-about .team-figure {
  margin: 0 0 32px;
}

.page-about .team-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-lg);
  filter: saturate(0.85) contrast(1.05);
}

.page-about .team-figure figcaption,
.page-about .ways-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--text-soft);
}

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

.page-about .team-card {
  padding-top: 18px;
  border-top: 2px solid rgba(43, 240, 210, 0.34);
}

.page-about .team-count {
  display: block;
  font-family: var(--font-mono);
  font-size: 2rem;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .team-card h3 {
  margin: 10px 0 8px;
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--text);
}

.page-about .team-card p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--text-soft);
}

/* ---------- 指标带 ---------- */
.page-about .metric-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .metric {
  padding: 18px 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .metric-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 6vw, 2.1rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.page-about .metric-num .unit {
  margin-left: 3px;
  font-size: 0.62em;
  color: var(--cyan);
}

.page-about .metric-label {
  display: block;
  margin-top: 7px;
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  color: var(--text-soft);
}

/* ---------- 做事方式 ---------- */
.page-about .ways-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
}

.page-about .ways-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 22px;
}

.page-about .ways-list li {
  position: relative;
  padding-left: 20px;
  border-left: 1px solid var(--about-rule-strong);
}

.page-about .ways-list li::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .ways-list h3 {
  margin: 0 0 7px;
  font-size: 1rem;
  font-weight: 800;
  color: var(--text);
}

.page-about .ways-list p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--text-soft);
}

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

.page-about .ways-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-rule);
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  padding: 56px 0 8px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-next-inner {
  padding: 28px 22px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(43, 240, 210, 0.1) 0%, rgba(43, 240, 210, 0) 58%),
    radial-gradient(120% 140% at 100% 100%, rgba(255, 178, 91, 0.1) 0%, rgba(255, 178, 91, 0) 60%),
    var(--ink-800);
  border: 1px solid var(--about-rule);
}

.page-about .about-next h2 {
  margin: 0 0 12px;
  font-size: clamp(1.35rem, 3.6vw, 1.9rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text);
}

.page-about .about-next p {
  margin: 0 0 22px;
  max-width: 40em;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--text-soft);
}

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

/* ---------- 窄屏保护 ---------- */
@media (max-width: 360px) {
  .page-about .about-hero h1 {
    font-size: 1.95rem;
  }

  .page-about .six-item {
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 10px;
  }

  .page-about .about-next-links .btn {
    width: 100%;
    text-align: center;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .metric-band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }

  .page-about .six-item {
    grid-template-columns: 60px minmax(0, 1fr);
    gap: 18px;
  }

  .page-about .six-num {
    font-size: 1.6rem;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about {
    padding-bottom: 96px;
  }

  .page-about .about-hero {
    padding: 56px 0 76px;
  }

  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.78fr);
    align-items: end;
    gap: 56px;
  }

  .page-about .about-facts {
    padding: 4px 0 4px 24px;
    border-top: 0;
    border-left: 1px solid var(--about-rule);
  }

  .page-about .about-section,
  .page-about .about-timeline {
    padding: 76px 0;
  }

  .page-about .tl-node {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 26px;
    padding: 0 0 48px 40px;
  }

  .page-about .tl-year {
    font-size: 1.15rem;
    padding-top: 2px;
  }

  .page-about .tl-track::before {
    left: 0;
  }

  .page-about .tl-node::before {
    left: -6px;
    top: 8px;
    width: 13px;
    height: 13px;
  }

  .page-about .six-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 56px;
  }

  .page-about .six-item:nth-last-child(2) {
    border-bottom: 1px solid var(--about-rule);
  }

  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
  }

  .page-about .ways-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 60px;
  }

  .page-about .about-next-inner {
    padding: 40px 44px;
  }
}

/* ---------- 动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .breadcrumbs a {
    transition: none;
  }
}