.page-about {
  background: var(--db-space);
  color: var(--db-mist);
  font-family: var(--db-f-display);
  overflow-x: hidden;
}

.page-about .about-crumbs {
  padding: 18px 0 0;
  font-size: 13px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--db-line);
  background:
    repeating-linear-gradient(90deg, rgba(56, 242, 210, 0.06) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(143, 166, 184, 0.05) 0 1px, transparent 1px 96px),
    radial-gradient(120% 90% at 82% 0%, rgba(27, 20, 64, 0.85), transparent 62%),
    var(--db-space);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 32px;
  padding-top: 26px;
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-size: clamp(34px, 8vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 900;
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 34em;
  color: var(--db-slate);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .about-hero__stats {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__stat {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0 12px 14px;
  border-left: 2px solid var(--db-cyan);
  background: linear-gradient(90deg, var(--db-cyan-soft), transparent 78%);
}

.page-about .about-hero__stat .db-num {
  font-size: 26px;
  color: var(--db-amber);
  letter-spacing: -0.01em;
}

.page-about .about-hero__statlabel {
  font-size: 13px;
  color: var(--db-slate);
  line-height: 1.5;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__media {
  margin: 0;
  position: relative;
  border: 1px solid var(--db-line);
  border-radius: var(--db-radius);
  padding: 10px;
  background: rgba(5, 18, 31, 0.7);
}

.page-about .about-hero__media::before {
  content: "";
  position: absolute;
  inset: -7px -7px auto auto;
  width: 46px;
  height: 46px;
  border-top: 2px solid var(--db-amber);
  border-right: 2px solid var(--db-amber);
  pointer-events: none;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 460px;
  object-fit: cover;
  border-radius: 2px;
}

.page-about .about-hero__caption {
  padding: 8px 2px 0;
  font-family: var(--db-f-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--db-slate);
}

/* ---------- 主体布局 ---------- */
.page-about .about-layout {
  display: grid;
  gap: 24px;
  padding-top: 32px;
  padding-bottom: 40px;
}

.page-about .about-toc {
  border: 1px solid var(--db-line-2);
  border-radius: var(--db-radius);
  padding: 16px;
  background: var(--db-space-deep);
}

.page-about .about-toc__title {
  margin: 0 0 10px;
  font-family: var(--db-f-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--db-cyan);
}

.page-about .about-toc__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px 10px;
}

.page-about .about-toc__list a {
  display: flex;
  gap: 8px;
  align-items: baseline;
  padding: 8px 0;
  color: var(--db-mist);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.4;
  border-bottom: 1px dashed rgba(143, 166, 184, 0.18);
}

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

.page-about .about-toc__idx {
  font-family: var(--db-f-mono);
  font-size: 11px;
  color: var(--db-amber);
}

.page-about .about-flow {
  display: grid;
  gap: 20px;
  min-width: 0;
}

/* ---------- 面板 ---------- */
.page-about .about-panel {
  position: relative;
  padding: 26px 18px;
  border: 1px solid var(--db-line-2);
  border-radius: var(--db-radius);
  background: var(--db-space-deep);
  box-shadow: 6px 6px 0 rgba(3, 11, 20, 0.55);
}

.page-about .about-panel--teal { background: var(--db-teal); }
.page-about .about-panel--indigo { background: var(--db-indigo); }
.page-about .about-panel--wine { background: var(--db-wine); }

.page-about .about-panel--mist {
  background: var(--db-mist);
  color: var(--db-space);
  border-color: rgba(3, 11, 20, 0.24);
  box-shadow: 6px 6px 0 rgba(3, 11, 20, 0.18);
}

.page-about .about-panel--mist .db-h2,
.page-about .about-panel--mist .db-h3 { color: var(--db-space); }

.page-about .about-text--dark { color: #0f2b3c; }

.page-about .about-stage {
  display: grid;
  gap: 14px;
}

.page-about .about-stage__label {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .about-stage__num {
  font-family: var(--db-f-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--db-amber);
}

.page-about .about-stage__num--dark { color: var(--db-wine); }

.page-about .about-stage__rail {
  font-family: var(--db-f-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--db-cyan);
  padding: 4px 10px;
  border: 1px solid var(--db-line);
  border-radius: 2px;
  background: var(--db-cyan-soft);
}

.page-about .about-stage__rail--dark {
  color: var(--db-space);
  border-color: rgba(3, 11, 20, 0.3);
  background: rgba(255, 181, 71, 0.28);
}

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

.page-about .about-stage__body h2 { margin-top: 4px; }

.page-about .about-stage__body .db-text {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-origin__list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-origin__list li {
  position: relative;
  padding: 10px 12px 10px 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--db-slate);
  border-left: 1px solid var(--db-line);
}

.page-about .about-origin__list strong {
  display: block;
  color: var(--db-mist);
  font-size: 14px;
  letter-spacing: 0.04em;
  margin-bottom: 2px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline__fig {
  margin: 18px 0 0;
  border: 1px solid var(--db-line);
  border-radius: var(--db-radius);
  padding: 8px;
  background: rgba(5, 18, 31, 0.6);
}

.page-about .about-timeline__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 2px;
}

.page-about .about-tabs { margin-top: 22px; }

.page-about .about-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--db-line);
}

.page-about .about-tabs__btn {
  min-height: 44px;
  padding: 10px 14px;
  font-family: var(--db-f-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--db-slate);
  background: transparent;
  border: 1px solid var(--db-line-2);
  border-radius: 2px;
  cursor: pointer;
  transition: color 180ms var(--db-ease), border-color 180ms var(--db-ease), background 180ms var(--db-ease);
}

.page-about .about-tabs__btn[aria-selected="true"] {
  color: var(--db-space);
  background: var(--db-cyan);
  border-color: var(--db-cyan);
}

.page-about .about-tabs__btn:focus-visible {
  outline: 2px solid var(--db-amber);
  outline-offset: 2px;
}

.page-about .about-tabpanel {
  padding: 18px 0 4px;
  animation: about-fade 220ms var(--db-ease);
}

.page-about .about-tabpanel[hidden] { display: none; }

.page-about .about-tabpanel__meta {
  margin: 0 0 6px;
  font-family: var(--db-f-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--db-amber);
}

.page-about .about-tabpanel h3 { margin: 0 0 8px; }

.page-about .about-tabpanel .db-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--db-slate);
}

@keyframes about-fade {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tabpanel { animation: none; }
}

/* ---------- 内容方法 ---------- */
.page-about .about-dim {
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(3, 11, 20, 0.16);
}

.page-about .about-dim__item {
  padding: 14px 0;
  border-bottom: 1px solid rgba(3, 11, 20, 0.16);
}

.page-about .about-dim dt {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--db-wine);
}

.page-about .about-dim dd {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: #16394c;
}

.page-about .about-proof {
  margin-top: 24px;
  padding: 16px;
  border: 1px solid rgba(3, 11, 20, 0.22);
  border-left: 3px solid var(--db-amber);
  background: rgba(255, 255, 255, 0.55);
  border-radius: 2px;
}

.page-about .about-proof__title { margin: 0 0 12px; }

.page-about .about-proof__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  counter-reset: proof;
}

.page-about .about-proof__list li {
  display: grid;
  gap: 4px;
  font-size: 14px;
  line-height: 1.7;
  color: #16394c;
  padding-left: 14px;
  border-left: 1px dashed rgba(3, 11, 20, 0.24);
}

.page-about .about-proof__step {
  font-family: var(--db-f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--db-space);
  background: rgba(56, 242, 210, 0.4);
  border-radius: 2px;
  padding: 2px 8px;
  justify-self: start;
}

.page-about .about-proof__note {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: #16394c;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  margin-top: 20px;
  border-top: 1px solid var(--db-line);
}

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

.page-about .about-team__row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 4px 10px;
  padding: 14px 0;
  border-bottom: 1px solid var(--db-line);
}

.page-about .about-team__idx {
  font-family: var(--db-f-mono);
  font-size: 12px;
  color: var(--db-slate);
  align-self: center;
}

.page-about .about-team__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--db-mist);
}

.page-about .about-team__count {
  font-family: var(--db-f-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--db-amber);
  line-height: 1;
}

.page-about .about-team__desc {
  grid-column: 1 / -1;
  font-size: 14px;
  line-height: 1.7;
  color: var(--db-slate);
}

/* ---------- 反馈闭环 ---------- */
.page-about .about-loop {
  display: grid;
  gap: 18px;
  margin-top: 20px;
}

.page-about .about-loop__fig {
  margin: 0;
  border: 1px solid var(--db-line);
  border-radius: var(--db-radius);
  padding: 8px;
  background: rgba(5, 18, 31, 0.5);
}

.page-about .about-loop__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 2px;
}

.page-about .about-acc {
  border-bottom: 1px solid var(--db-line);
}

.page-about .about-acc__btn {
  display: flex;
  width: 100%;
  min-height: 48px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 4px;
  font-family: var(--db-f-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--db-mist);
  background: transparent;
  border: 0;
  text-align: left;
  cursor: pointer;
}

.page-about .about-acc__btn:hover { color: var(--db-cyan); }

.page-about .about-acc__btn:focus-visible {
  outline: 2px solid var(--db-amber);
  outline-offset: -2px;
}

.page-about .about-acc__btn .db-acc__sign {
  font-family: var(--db-f-mono);
  font-size: 16px;
  color: var(--db-cyan);
}

.page-about .about-acc__panel {
  padding: 0 4px 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--db-slate);
}

.page-about .about-acc__panel p { margin: 0; }

.page-about .about-status {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-status li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  align-items: start;
  font-size: 13px;
  line-height: 1.6;
  color: var(--db-slate);
  padding: 8px 0;
  border-top: 1px dashed rgba(143, 166, 184, 0.22);
}

.page-about .about-status .db-badge { white-space: nowrap; }

.page-about .about-loop__note {
  margin: 14px 0 0;
  font-family: var(--db-f-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--db-cyan);
}

/* ---------- 规模 ---------- */
.page-about .about-scale {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 20px;
  background: rgba(234, 246, 245, 0.22);
  border: 1px solid rgba(234, 246, 245, 0.22);
}

.page-about .about-scale__cell {
  padding: 16px 12px;
  background: rgba(3, 11, 20, 0.22);
}

.page-about .about-scale__num {
  display: block;
  font-size: clamp(24px, 6vw, 34px);
  color: var(--db-amber);
  letter-spacing: -0.02em;
}

.page-about .about-scale__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.5;
  color: rgba(234, 246, 245, 0.82);
}

.page-about .about-honor {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-honor li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  align-items: start;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(234, 246, 245, 0.9);
}

.page-about .about-honor__tag {
  font-family: var(--db-f-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--db-amber);
  border: 1px solid rgba(255, 181, 71, 0.5);
  border-radius: 2px;
  padding: 2px 6px;
  white-space: nowrap;
}

/* ---------- 下一阶段 ---------- */
.page-about .about-next {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.page-about .about-next__item {
  padding: 16px;
  border: 1px solid var(--db-line-2);
  border-top: 2px solid var(--db-cyan);
  border-radius: 2px;
  background: rgba(56, 242, 210, 0.05);
}

.page-about .about-next__item h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.page-about .about-next__item .db-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--db-slate);
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  padding: 26px 18px;
  border: 1px solid var(--db-line);
  border-radius: var(--db-radius);
  background:
    radial-gradient(100% 120% at 0% 0%, rgba(56, 242, 210, 0.16), transparent 60%),
    linear-gradient(135deg, var(--db-indigo), var(--db-space-deep));
}

.page-about .about-cta__title { margin: 0; font-size: 22px; }

.page-about .about-cta__text {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--db-slate);
  max-width: 46em;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.page-about .about-totop {
  justify-self: start;
  min-height: 44px;
  padding: 10px 16px;
  font-family: var(--db-f-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--db-slate);
  background: transparent;
  border: 1px solid var(--db-line-2);
  border-radius: 2px;
  cursor: pointer;
}

.page-about .about-totop:hover { color: var(--db-cyan); border-color: var(--db-cyan); }

.page-about .about-totop:focus-visible {
  outline: 2px solid var(--db-amber);
  outline-offset: 2px;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
  }

  .page-about .about-hero__stat {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .page-about .about-panel { padding: 32px 28px; }

  .page-about .about-stage {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: 24px;
  }

  .page-about .about-stage__label {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    border-right: 1px solid var(--db-line-2);
    padding-right: 16px;
  }

  .page-about .about-stage__rail {
    writing-mode: vertical-rl;
    letter-spacing: 0.34em;
    padding: 12px 5px;
  }

  .page-about .about-stage__rail--dark { border-color: rgba(3, 11, 20, 0.26); }

  .page-about .about-dim {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 28px;
    border-top: 0;
  }

  .page-about .about-dim__item {
    border-top: 1px solid rgba(3, 11, 20, 0.16);
  }

  .page-about .about-team__head {
    display: grid;
    grid-template-columns: 44px minmax(0, 1.1fr) 56px minmax(0, 2.4fr);
    gap: 16px;
    padding: 10px 0;
    font-family: var(--db-f-mono);
    font-size: 11px;
    letter-spacing: 0.16em;
    color: var(--db-slate);
    border-bottom: 1px solid var(--db-line);
  }

  .page-about .about-team__row {
    grid-template-columns: 44px minmax(0, 1.1fr) 56px minmax(0, 2.4fr);
    gap: 16px;
    align-items: baseline;
    padding: 16px 0;
  }

  .page-about .about-team__desc { grid-column: auto; }

  .page-about .about-loop {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
    gap: 24px;
  }

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

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

  .page-about .about-toc__list { grid-template-columns: 1fr; }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
    align-items: start;
    padding-top: 40px;
  }

  .page-about .about-hero__media img { max-height: 520px; }

  .page-about .about-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 40px;
    padding-top: 44px;
  }

  .page-about .about-toc {
    position: sticky;
    top: 88px;
    align-self: start;
  }

  .page-about .about-stage {
    grid-template-columns: 156px minmax(0, 1fr);
    gap: 34px;
  }

  .page-about .about-panel { padding: 40px 36px; }

  .page-about .about-tabs__list { gap: 10px; }

  .page-about .about-tabpanel { padding: 24px 0 8px; }

  .page-about .about-cta {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 12px 32px;
    padding: 34px 36px;
  }

  .page-about .about-cta__title,
  .page-about .about-cta__text { grid-column: 1; }

  .page-about .about-cta__actions {
    grid-column: 2;
    grid-row: 1 / span 2;
    margin-top: 0;
    justify-content: flex-end;
  }
}
<<<END>>>