.page-about {
  --about-edge: rgba(216, 222, 228, 0.18);
  --about-edge-strong: rgba(216, 222, 228, 0.34);
  --about-ink: var(--ink-950);
  --about-panel: rgba(13, 41, 64, 0.55);
}

.page-about .about-context {
  padding-top: clamp(1.4rem, 3vw, 2.4rem);
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

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

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a[aria-current="page"] {
  color: var(--cyan);
}

.page-about .crumb-sep {
  opacity: 0.5;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(2rem, 6vw, 4.5rem) 0 clamp(2.4rem, 5vw, 4rem);
  border-bottom: 1px solid var(--about-edge);
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  top: 8%;
  width: 42vw;
  height: 42vw;
  max-width: 520px;
  max-height: 520px;
  border: 1px solid rgba(14, 124, 134, 0.35);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 900px;
}

.page-about .about-hero .eyebrow {
  color: var(--orange);
  margin: 0 0 1.1rem;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.5rem, 9.2vw, 5.6rem);
  line-height: 0.96;
  letter-spacing: -0.015em;
  margin: 0 0 1.4rem;
  max-width: 16ch;
}

.page-about .about-lead {
  font-size: clamp(1rem, 2.6vw, 1.12rem);
  line-height: 1.8;
  color: rgba(247, 242, 232, 0.82);
  max-width: 62ch;
  margin: 0 0 1.8rem;
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.page-about .about-jump {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1rem 0 0;
  border-top: 1px dashed var(--about-edge);
  max-width: 620px;
}

.page-about .about-jump-label {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--paper-gray, #d8dee4);
  color: var(--muted);
}

.page-about .about-jump a {
  color: var(--cyan);
  text-decoration: none;
  font-size: 0.95rem;
  border-bottom: 1px solid transparent;
  width: fit-content;
  padding-bottom: 1px;
}

.page-about .about-jump a:hover {
  border-bottom-color: var(--orange);
  color: var(--orange-300);
}

/* 目录 */
.page-about .about-toc {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 1.6rem 0 0.3rem;
  margin-top: 1.8rem;
  border-top: 1px solid var(--about-edge);
  scrollbar-width: thin;
}

.page-about .about-toc .toc-title {
  display: none;
}

.page-about .about-toc .toc-link {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--muted);
  border: 1px solid var(--about-edge);
  padding: 0.42rem 0.7rem;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-toc .toc-link:hover,
.page-about .about-toc .toc-link[aria-current="true"] {
  color: var(--ink-950);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: clamp(2.6rem, 6vw, 5rem) 0;
  border-bottom: 1px solid var(--about-edge);
}

.page-about .about-section--panel {
  background: linear-gradient(180deg, rgba(13, 41, 64, 0.72), rgba(4, 17, 31, 0.2));
  border-top: 1px solid var(--about-edge);
}

.page-about .about-num {
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--orange);
  margin: 0 0 0.8rem;
}

.page-about .about-sec-head {
  max-width: 62ch;
  margin-bottom: clamp(1.8rem, 4vw, 2.8rem);
}

.page-about .about-sec-head h2,
.page-about .about-body h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 5vw, 2.9rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0 0 0.9rem;
}

.page-about .about-sub {
  margin: 0;
  color: rgba(247, 242, 232, 0.7);
  line-height: 1.8;
  font-size: 0.98rem;
}

.page-about .about-body p {
  line-height: 1.85;
  color: rgba(247, 242, 232, 0.78);
  margin: 0 0 1.1rem;
  font-size: 1rem;
}

.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: start;
}

.page-about .about-body {
  min-width: 0;
}

.page-about .about-points {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  border-top: 1px solid var(--about-edge);
}

.page-about .about-points li {
  display: flex;
  gap: 0.9rem;
  align-items: baseline;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--about-edge);
  color: rgba(247, 242, 232, 0.86);
  font-size: 0.95rem;
  line-height: 1.6;
}

.page-about .about-points li .mono {
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.14em;
  flex: 0 0 auto;
}

.page-about .about-figure {
  margin: 0;
  border: 2px solid var(--about-edge-strong);
  box-shadow: var(--shadow-hard);
  background: var(--ink-900);
}

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

.page-about .about-figure figcaption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
  padding: 0.7rem 0.9rem;
  border-top: 1px solid var(--about-edge);
}

/* ---------- 流程 ---------- */
.page-about .about-method-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: start;
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  counter-reset: none;
}

.page-about .about-step {
  border-top: 3px solid var(--orange);
  padding: 1rem 0 0.4rem;
  min-width: 0;
}

.page-about .about-step-num {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--orange-300);
  display: block;
  margin-bottom: 0.5rem;
}

.page-about .about-step h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.22rem;
  letter-spacing: 0.01em;
  margin: 0 0 0.5rem;
}

.page-about .about-step p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: rgba(247, 242, 232, 0.72);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline-wrap {
  position: relative;
  padding: 1rem 0 0;
}

.page-about .about-tl-bg {
  display: none;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.5rem;
  border-left: 2px solid var(--about-edge-strong);
  position: relative;
}

.page-about .about-tl-item {
  position: relative;
  padding: 0 0 1.8rem 0;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: calc(-1.5rem - 7px);
  top: 0.45rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink-950);
  border: 2px solid var(--orange);
}

.page-about .about-tl-item:last-child {
  padding-bottom: 0;
}

.page-about .about-tl-item:last-child::before {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 26, 0.18);
}

.page-about .about-tl-year {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin-bottom: 0.4rem;
}

.page-about .about-tl-body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.24rem;
  margin: 0 0 0.4rem;
  letter-spacing: 0.01em;
}

.page-about .about-tl-body p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: rgba(247, 242, 232, 0.72);
  max-width: 48ch;
}

.page-about .about-timeline-more {
  margin: 1.8rem 0 0;
  font-size: 0.94rem;
  color: rgba(247, 242, 232, 0.66);
}

.page-about .about-timeline-more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(45, 226, 230, 0.45);
}

.page-about .about-timeline-more a:hover {
  color: var(--orange-300);
  border-bottom-color: var(--orange);
}

/* ---------- 数据 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-edge);
  border: 1px solid var(--about-edge);
  margin-bottom: clamp(1.6rem, 4vw, 2.4rem);
}

.page-about .about-stat {
  background: var(--ink-900);
  padding: 1.3rem 1.15rem 1.5rem;
  min-width: 0;
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 9vw, 3.6rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin-bottom: 0.7rem;
}

.page-about .about-stat-unit {
  font-size: 0.5em;
  margin-left: 0.15em;
  color: var(--orange);
}

.page-about .about-stat-label {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(247, 242, 232, 0.68);
}

.page-about .about-scale-foot {
  display: grid;
  gap: 1.2rem;
  align-items: start;
  border-left: 2px solid var(--cyan-700);
  padding-left: 1.1rem;
}

.page-about .about-scale-foot p {
  margin: 0;
  line-height: 1.85;
  color: rgba(247, 242, 232, 0.76);
  font-size: 0.96rem;
  max-width: 60ch;
}

.page-about .about-scale-foot .btn {
  width: fit-content;
}

/* ---------- 合作 ---------- */
.page-about .about-split--reverse {
  align-items: stretch;
}

.page-about .about-partner-list {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .about-partner-list li {
  display: flex;
  gap: 0.8rem;
  align-items: baseline;
  font-size: 0.94rem;
  line-height: 1.7;
  color: rgba(247, 242, 232, 0.8);
  border-bottom: 1px dashed var(--about-edge);
  padding-bottom: 0.7rem;
}

.page-about .about-partner-list .mono {
  flex: 0 0 auto;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-950);
  background: var(--cyan);
  padding: 0.15rem 0.45rem;
}

.page-about .about-quote-card {
  background: var(--paper);
  color: var(--ink-950);
  border: 2px solid var(--ink-950);
  box-shadow: 8px 8px 0 rgba(255, 106, 26, 0.55);
  padding: clamp(1.3rem, 4vw, 2rem);
  margin: 0;
  align-self: start;
}

.page-about .about-quote-tag {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--orange);
  margin: 0 0 0.9rem;
}

.page-about .about-quote-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.2rem, 4vw, 1.6rem);
  line-height: 1.4;
  margin: 0 0 1.1rem;
  color: var(--ink-950);
}

.page-about .about-quote-sign {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(4, 17, 31, 0.62);
  margin: 0;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 0.7rem;
  margin-bottom: clamp(1.8rem, 4vw, 2.6rem);
}

.page-about .about-team-item {
  background: var(--paper);
  color: var(--ink-950);
  border: 2px solid var(--ink-950);
  box-shadow: 5px 5px 0 rgba(45, 226, 230, 0.28);
}

.page-about .about-team-item summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.6rem 0.9rem;
  padding: 0.95rem 1.05rem;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 2.4rem;
}

.page-about .about-team-item summary::-webkit-details-marker {
  display: none;
}

.page-about .about-team-idx {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .about-team-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.01em;
}

.page-about .about-team-count {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: rgba(4, 17, 31, 0.55);
  border: 1px solid rgba(4, 17, 31, 0.25);
  padding: 0.1rem 0.4rem;
}

.page-about .about-team-item summary::after {
  content: "+";
  position: absolute;
  right: 1.05rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--ink-950);
  transition: transform 0.2s var(--ease);
}

.page-about .about-team-item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
  color: var(--orange);
}

.page-about .about-team-body {
  padding: 0 1.05rem 1.1rem;
  border-top: 1px dashed rgba(4, 17, 31, 0.22);
  margin-top: 0.2rem;
}

.page-about .about-team-body p {
  margin: 0.85rem 0 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: rgba(4, 17, 31, 0.78);
}

/* ---------- 结尾 CTA ---------- */
.page-about .about-cta {
  display: grid;
  gap: 1.2rem;
  padding: clamp(1.3rem, 4vw, 2rem);
  border: 1px solid var(--about-edge-strong);
  border-left: 4px solid var(--orange);
  background: rgba(13, 41, 64, 0.6);
}

.page-about .about-cta h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.25rem, 4vw, 1.6rem);
  margin: 0 0 0.5rem;
  letter-spacing: 0.01em;
}

.page-about .about-cta p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: rgba(247, 242, 232, 0.72);
  max-width: 46ch;
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.4rem 1.6rem;
  }

  .page-about .about-jump {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 1.4rem;
  }

  .page-about .about-jump-label {
    flex: 0 0 auto;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 880px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(2rem, 4vw, 3.4rem);
  }

  .page-about .about-split--reverse {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-about .about-method-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: clamp(2rem, 4vw, 3.2rem);
  }

  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-toc {
    flex-wrap: wrap;
    overflow-x: visible;
    padding-top: 2rem;
    margin-top: 2.4rem;
  }

  .page-about .about-toc .toc-title {
    display: block;
    flex: 0 0 auto;
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--muted);
    margin: 0 1rem 0 0;
    align-self: center;
  }

  .page-about .about-timeline-wrap {
    padding: clamp(2rem, 4vw, 3rem) clamp(1.5rem, 4vw, 3rem);
    border: 1px solid var(--about-edge);
    overflow: hidden;
  }

  .page-about .about-tl-bg {
    display: block;
    position: absolute;
    inset: 0;
    margin: 0;
    border: 0;
    box-shadow: none;
    opacity: 0.28;
    z-index: 0;
  }

  .page-about .about-tl-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .page-about .about-tl-bg figcaption {
    display: none;
  }

  .page-about .about-timeline {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.8rem 2.4rem;
    padding-left: 0;
    border-left: 0;
  }

  .page-about .about-tl-item {
    border-top: 2px solid var(--about-edge-strong);
    padding: 1.1rem 0 0;
  }

  .page-about .about-tl-item::before {
    left: 0;
    top: -7px;
    width: 12px;
    height: 12px;
    background: var(--ink-950);
    border: 2px solid var(--cyan);
  }

  .page-about .about-tl-item:last-child::before {
    background: var(--orange);
    border-color: var(--orange);
    box-shadow: 0 0 0 4px rgba(255, 106, 26, 0.2);
  }

  .page-about .about-scale-foot {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 2rem;
  }
}

@media (min-width: 1180px) {
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.8rem 2rem;
  }

  .page-about .about-hero h1 {
    font-size: clamp(3.4rem, 6.4vw, 5.6rem);
  }
}
</final_solution>

.page-about {
  --paper-gray: currentColor;
}