.page-about {
  --about-line: rgba(31, 58, 110, 0.2);
  --about-soft: rgba(255, 255, 255, 0.16);
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  margin: 0 0 clamp(1.5rem, 4vw, 2.25rem);
  padding: 0;
}
.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.5);
}
.page-about .breadcrumb-list li {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}
.page-about .breadcrumb-list li + li::before {
  content: "›";
  color: var(--orange);
  font-size: 0.875rem;
  line-height: 1;
}
.page-about .breadcrumb-list a {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease-out), border-color 0.2s var(--ease-out);
}
.page-about .breadcrumb-list a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}
.page-about .breadcrumb-list [aria-current="page"] {
  color: var(--orange-soft);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(1.25rem, 3.5vw, 2rem) 0 clamp(3.5rem, 9vw, 6rem);
  background: var(--ink);
  color: var(--white);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(120% 90% at 92% -6%, rgba(255, 107, 53, 0.3), transparent 58%),
    radial-gradient(90% 70% at 0% 104%, rgba(199, 244, 100, 0.13), transparent 62%),
    repeating-linear-gradient(90deg, rgba(31, 58, 110, 0.55) 0 1px, transparent 1px 88px);
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 48px;
  background: var(--paper);
  clip-path: polygon(0 76%, 100% 0, 100% 100%, 0 100%);
}
.page-about .about-hero-grid {
  position: relative;
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}
.page-about .about-hero h1 {
  margin: 0.55rem 0 1rem;
  font-size: clamp(1.85rem, 5.4vw, 3.35rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.025em;
}
.page-about .about-h1-hl {
  display: block;
  color: var(--orange);
}
.page-about .about-hero-lede {
  max-width: 46ch;
  margin: 0;
  font-size: clamp(0.9875rem, 1.6vw, 1.0625rem);
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.78);
}
.page-about .about-hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
  background: var(--ink-3);
  border: 1px solid var(--ink-3);
}
.page-about .about-hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
  padding: 0.8rem 0.85rem 0.95rem;
  background: var(--ink);
}
.page-about .about-fact-num {
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 3.2vw, 1.35rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--lime);
}
.page-about .about-fact-label {
  font-size: 0.75rem;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.6);
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}
.page-about .about-hero-media {
  position: relative;
  margin: 0;
  border: 3px solid var(--orange);
  background: var(--ink-2);
  box-shadow: 0 0 0 8px rgba(255, 107, 53, 0.12);
}
.page-about .about-hero-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-hero-media figcaption {
  padding: 0.6rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.07em;
  color: rgba(255, 255, 255, 0.62);
  background: var(--ink-2);
  border-top: 1px solid var(--ink-3);
}

/* ---------- 通用分区 ---------- */
.page-about .about-sec {
  padding-block: clamp(2.75rem, 7vw, 5rem);
}
.page-about .about-sec--paper {
  background: var(--paper);
  color: var(--ink);
}
.page-about .about-sec--ink {
  background: var(--ink-2);
  color: var(--white);
}
.page-about .about-sec--deep {
  background: var(--ink);
  color: var(--white);
}
.page-about .about-head {
  max-width: 48rem;
  margin-bottom: clamp(1.65rem, 4vw, 2.75rem);
}
.page-about .about-head h2 {
  margin: 0.5rem 0 0.85rem;
  font-size: clamp(1.5rem, 3.6vw, 2.35rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.018em;
}
.page-about .about-head-lede {
  margin: 0;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--muted);
}
.page-about .about-sec--ink .about-head-lede,
.page-about .about-sec--deep .about-head-lede {
  color: rgba(255, 255, 255, 0.7);
}
.page-about .about-text {
  margin: 0 0 1rem;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--ink-2);
}
.page-about .about-text:last-child {
  margin-bottom: 0;
}

/* ---------- 品牌起点 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.75rem);
}
.page-about .about-split-main h2 {
  margin: 0.5rem 0 1.1rem;
  font-size: clamp(1.5rem, 3.6vw, 2.35rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.018em;
}
.page-about .about-note {
  align-self: start;
  padding: 1.35rem 1.25rem 1.3rem;
  background: var(--white);
  border-top: 3px solid var(--orange);
  box-shadow: var(--shadow-panel);
}
.page-about .about-note-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ink-3);
}
.page-about .about-note-list {
  display: grid;
  gap: 1rem;
  margin: 1.1rem 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-note-list li {
  position: relative;
  padding-left: 1.1rem;
  border-left: 2px solid var(--about-line);
}
.page-about .about-note-list li strong {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}
.page-about .about-note-list li span {
  display: block;
  font-size: 0.875rem;
  line-height: 1.68;
  color: var(--muted);
}

/* ---------- 官方矩阵 ---------- */
.page-about .about-matrix {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-soft);
}
.page-about .about-matrix li {
  position: relative;
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: 0.3rem 0.75rem;
  padding: 1.15rem 0.5rem 1.15rem 0.85rem;
  border-bottom: 1px solid var(--about-soft);
  transition: background-color 0.22s var(--ease-out);
}
.page-about .about-matrix li::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 2px;
  background: var(--orange);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.22s var(--ease-out);
}
.page-about .about-matrix li:hover {
  background: rgba(255, 107, 53, 0.08);
}
.page-about .about-matrix li:hover::before {
  transform: scaleY(1);
}
.page-about .about-matrix-index {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--lime);
}
.page-about .about-matrix h3 {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.page-about .about-matrix p {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  font-size: 0.9125rem;
  line-height: 1.72;
  color: rgba(255, 255, 255, 0.72);
}
.page-about .about-matrix-foot {
  margin: 1.5rem 0 0;
  padding-left: 0.85rem;
  border-left: 3px solid var(--lime);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.72);
}

/* ---------- 发展历程 ---------- */
.page-about .about-track {
  position: relative;
  display: grid;
  gap: clamp(1.25rem, 3vw, 1.9rem);
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-track::before {
  content: "";
  position: absolute;
  top: 0.7rem;
  bottom: 0.7rem;
  left: 0.8rem;
  width: 2px;
  background: linear-gradient(180deg, var(--orange), var(--lime));
  opacity: 0.55;
}
.page-about .about-track-item {
  display: grid;
  grid-template-columns: 1.6rem minmax(0, 1fr);
  gap: clamp(0.75rem, 2vw, 1.35rem);
}
.page-about .about-track-dot {
  justify-self: center;
  align-self: start;
  width: 0.8rem;
  height: 0.8rem;
  margin-top: 1.05rem;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.22);
  transition: background-color 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
}
.page-about .about-track-item:hover .about-track-dot {
  background: var(--lime);
  box-shadow: 0 0 0 6px rgba(199, 244, 100, 0.22);
}
.page-about .about-track-panel {
  min-width: 0;
  padding: 1.15rem 1.15rem 1.3rem;
  background: var(--ink-2);
  border-top: 3px solid var(--ink-3);
  transition: border-color 0.22s var(--ease-out), transform 0.22s var(--ease-out);
}
.page-about .about-track-item:hover .about-track-panel {
  border-top-color: var(--orange);
  transform: translateY(-2px);
}
.page-about .about-ver {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin: 0 0 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--lime);
}
.page-about .about-ver-year {
  font-weight: 500;
  color: rgba(255, 255, 255, 0.45);
}
.page-about .about-track-panel h3 {
  margin: 0 0 0.55rem;
  font-size: clamp(1.0625rem, 2.4vw, 1.25rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
}
.page-about .about-track-panel p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.74);
}
.page-about .about-track-media {
  position: relative;
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
  border-left: 4px solid var(--orange);
  background: var(--ink-2);
}
.page-about .about-track-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-track-media figcaption {
  padding: 0.6rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.07em;
  color: rgba(255, 255, 255, 0.58);
  border-top: 1px solid var(--ink-3);
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}
.page-about .about-team-tabs {
  min-width: 0;
}
.page-about .tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 1.15rem;
  padding: 0;
}
.page-about .tab {
  appearance: none;
  cursor: pointer;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--about-line);
  border-radius: 0;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--ink-2);
  transition: background-color 0.2s var(--ease-out), color 0.2s var(--ease-out), border-color 0.2s var(--ease-out);
}
.page-about .tab:hover {
  border-color: var(--orange);
  color: var(--ink);
}
.page-about .tab[aria-selected="true"] {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--white);
}
.page-about .tab:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}
.page-about .tabpanel {
  padding: 1.35rem 1.25rem 1.4rem;
  background: var(--white);
  border-top: 3px solid var(--orange);
  box-shadow: var(--shadow-panel);
}
.page-about .tabpanel[hidden] {
  display: none;
}
.page-about .tabpanel h3 {
  margin: 0 0 0.55rem;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.page-about .tabpanel p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--muted);
}
.page-about .about-team-media {
  margin: 0;
  border: 3px solid var(--ink);
  background: var(--ink-2);
}
.page-about .about-team-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-team-media figcaption {
  padding: 0.6rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.07em;
  color: rgba(255, 255, 255, 0.66);
  background: var(--ink);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  background-color: var(--ink-2);
  background-image: radial-gradient(rgba(199, 244, 100, 0.16) 1.4px, transparent 1.5px);
  background-size: 22px 22px;
}
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 clamp(1.75rem, 4vw, 2.5rem);
  padding: 0;
  list-style: none;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.18);
}
.page-about .about-stats li {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 0;
  padding: 1rem 0.9rem 1.15rem;
  background: rgba(10, 31, 68, 0.82);
}
.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4.5vw, 2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}
.page-about .about-stat-label {
  font-size: 0.75rem;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.62);
}
.page-about .about-eco-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}
.page-about .about-eco-block h3 {
  margin: 0 0 0.6rem;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.page-about .about-eco-block p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.72);
}
.page-about .about-taglist {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 1.15rem 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-taglist li {
  padding: 0.28rem 0.65rem;
  border: 1px solid rgba(255, 255, 255, 0.24);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  color: rgba(255, 255, 255, 0.82);
}
.page-about .about-honor {
  display: grid;
  gap: 1px;
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
  background: rgba(255, 255, 255, 0.16);
}
.page-about .about-honor li {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.85rem 0.95rem;
  background: rgba(10, 31, 68, 0.82);
  border-left: 3px solid var(--orange);
}
.page-about .about-honor-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.09em;
  color: var(--orange-soft);
}
.page-about .about-honor-name {
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--white);
}

/* ---------- 服务原则 ---------- */
.page-about .about-principles {
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}
.page-about .about-principle {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: 0.3rem 0.7rem;
  padding: 1.35rem 1.15rem 1.45rem;
  background: var(--white);
  transition: background-color 0.22s var(--ease-out);
}
.page-about .about-principle:hover {
  background: #fffdfa;
}
.page-about .about-principle-num {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--orange);
}
.page-about .about-principle h3 {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.page-about .about-principle p {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  font-size: 0.9125rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding-block: clamp(2.5rem, 6vw, 4rem);
  background: var(--night);
  color: var(--white);
}
.page-about .about-cta-inner {
  display: grid;
  gap: 1.75rem;
}
.page-about .about-cta h2 {
  margin: 0.5rem 0 0.75rem;
  font-size: clamp(1.375rem, 3.4vw, 2rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.015em;
}
.page-about .about-cta-copy p:not(.eyebrow) {
  max-width: 52ch;
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.7);
}
.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}
.page-about .about-cta-link {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(199, 244, 100, 0.45);
  padding-bottom: 0.15rem;
  transition: color 0.2s var(--ease-out), border-color 0.2s var(--ease-out);
}
.page-about .about-cta-link:hover {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-matrix li {
    grid-template-columns: 3rem 12rem minmax(0, 1fr);
    align-items: baseline;
    gap: 0 1rem;
    padding: 1.2rem 0.75rem 1.2rem 1rem;
  }
  .page-about .about-matrix-index {
    grid-column: 1;
    grid-row: 1;
  }
  .page-about .about-matrix h3 {
    grid-column: 2;
    grid-row: 1;
  }
  .page-about .about-matrix p {
    grid-column: 3;
    grid-row: 1;
  }
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-principles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 920px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: clamp(2rem, 4vw, 3.5rem);
  }
  .page-about .about-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
  .page-about .about-eco-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    justify-content: space-between;
  }
  .page-about .about-cta-actions {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-matrix li,
  .page-about .about-matrix li::before,
  .page-about .about-track-dot,
  .page-about .about-track-panel,
  .page-about .tab,
  .page-about .about-principle,
  .page-about .about-cta-link {
    transition: none;
  }
  .page-about .about-track-item:hover .about-track-panel {
    transform: none;
  }
}