.page-about {
  background: var(--bg);
  color: var(--mist);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about * {
  box-sizing: border-box;
}

.page-about .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: 28px 0 56px;
  background:
    radial-gradient(120% 90% at 82% 0%, rgba(201, 255, 61, 0.11), transparent 62%),
    radial-gradient(90% 70% at 10% 20%, rgba(77, 224, 192, 0.08), transparent 66%),
    linear-gradient(180deg, var(--pitch) 0%, var(--bg) 78%);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(22, 61, 46, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(22, 61, 46, 0.55) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: radial-gradient(120% 80% at 74% 8%, #000 0%, transparent 74%);
  mask-image: radial-gradient(120% 80% at 74% 8%, #000 0%, transparent 74%);
  pointer-events: none;
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  opacity: 0.26;
}

.page-about .about-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.05);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  max-width: 22em;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(30px, 6.4vw, 62px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 60ch;
  color: var(--mist);
  font-size: 15px;
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.page-about .hero-stats__cell {
  background: rgba(15, 42, 32, 0.72);
  padding: 15px 16px;
}

.page-about .hero-stats__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .hero-stats__value {
  margin: 6px 0 0;
  font-size: 24px;
  font-weight: 700;
  color: var(--lime);
  line-height: 1.2;
}

/* ---------- 主体双栏 ---------- */

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding: 46px 0 72px;
}

.page-about .about-index {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.page-about .about-index__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-index__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-about .about-index__link {
  flex: 0 0 auto;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease-out), border-color 0.2s var(--ease-out), background 0.2s var(--ease-out);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--white);
  border-color: var(--orange);
}

.page-about .about-index__link[aria-current="true"] {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .about-flow {
  display: grid;
  gap: 56px;
  min-width: 0;
}

.page-about .about-section {
  scroll-margin-top: 120px;
  border-top: 1px solid var(--line);
  padding-top: 26px;
}

.page-about .about-section__lede {
  margin: 12px 0 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: 15px;
}

.page-about .section-title {
  margin: 10px 0 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(23px, 4.2vw, 34px);
  line-height: 1.3;
  color: var(--white);
}

/* ---------- 起点 ---------- */

.page-about .about-split {
  display: grid;
  gap: 22px;
  margin-top: 22px;
}

.page-about .about-split__text p {
  margin: 0 0 14px;
  font-size: 15px;
  color: var(--mist);
}

.page-about .about-split__text p:last-child {
  margin-bottom: 0;
}

.page-about .about-pull {
  margin: 0;
  padding: 22px 20px;
  border-left: 2px solid var(--lime);
  background: linear-gradient(135deg, rgba(15, 42, 32, 0.92), rgba(10, 26, 20, 0.5));
  border-radius: 0 14px 14px 0;
}

.page-about .about-pull__text {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 19px;
  line-height: 1.6;
  color: var(--white);
}

.page-about .about-pull__caption {
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 使用场景 ---------- */

.page-about .scene-list {
  list-style: none;
  margin: 25px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .scene-item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .scene-item:first-child {
  border-top: 1px solid var(--line);
}

.page-about .scene-item__idx {
  font-size: 14px;
  color: var(--cyan);
  letter-spacing: 0.06em;
  padding-top: 3px;
}

.page-about .scene-item__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-about .scene-item__body p {
  margin: 0;
  font-size: 14.5px;
  color: var(--muted);
}

/* ---------- 流程 ---------- */

.page-about .flow-track {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .flow-step {
  position: relative;
  padding: 18px 16px 18px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(160deg, rgba(15, 42, 32, 0.86), rgba(6, 11, 9, 0.9));
}

.page-about .flow-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--lime), rgba(201, 255, 61, 0));
}

.page-about .flow-step__num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .flow-step__title {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--white);
}

.page-about .flow-step p {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--muted);
}

.page-about .flow-step__meta {
  margin-bottom: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  color: var(--cyan);
}

/* ---------- 版本轨道 ---------- */

.page-about .version-track {
  display: flex;
  gap: 0;
  margin-top: 30px;
  padding: 0 0 6px;
  border-top: 1px solid var(--line);
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .version-node {
  position: relative;
  flex: 0 0 auto;
  width: 132px;
  padding: 22px 12px 10px;
  border-left: 1px solid rgba(22, 61, 46, 0.7);
  transition: background 0.2s var(--ease-out), transform 0.2s var(--ease-out);
}

.page-about .version-node:last-child {
  border-right: 1px solid rgba(22, 61, 46, 0.7);
}

.page-about .version-node__dot {
  position: absolute;
  top: -5px;
  left: 12px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 10px rgba(201, 255, 61, 0.6);
}

.page-about .version-node[data-kind="nav"] .version-node__dot {
  background: var(--orange);
  box-shadow: 0 0 10px rgba(255, 158, 74, 0.55);
}

.page-about .version-node[data-kind="stats"] .version-node__dot {
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(77, 224, 192, 0.55);
}

.page-about .version-node__label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--lime);
}

.page-about .version-node[data-kind="nav"] .version-node__label {
  color: var(--orange);
}

.page-about .version-node[data-kind="stats"] .version-node__label {
  color: var(--cyan);
}

.page-about .version-node__title {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .version-node__type {
  display: inline-block;
  margin-top: 10px;
  padding: 2px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  opacity: 0.55;
  transition: opacity 0.2s var(--ease-out), color 0.2s var(--ease-out), border-color 0.2s var(--ease-out);
}

.page-about .version-node:hover,
.page-about .version-node:focus-within {
  background: rgba(15, 42, 32, 0.6);
  transform: translateY(-2px);
}

.page-about .version-node:hover .version-node__type,
.page-about .version-node:focus-within .version-node__type {
  opacity: 1;
  color: var(--white);
  border-color: var(--orange);
}

.page-about .version-figure {
  margin: 22px 0 0;
}

.page-about .version-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  object-fit: cover;
  background: var(--panel);
}

.page-about .version-figure__caption {
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--muted);
}

.page-about .about-note {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 1px solid var(--orange);
  font-size: 14px;
  color: var(--muted);
}

/* ---------- 团队 ---------- */

.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-top: 26px;
}

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

.page-about .team-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
}

.page-about .team-figure__caption {
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--muted);
}

.page-about .team-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .team-card {
  padding: 16px 16px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(15, 42, 32, 0.55);
  transition: border-color 0.2s var(--ease-out), background 0.2s var(--ease-out);
}

.page-about .team-card:hover {
  border-color: var(--lime);
  background: rgba(15, 42, 32, 0.85);
}

.page-about .team-card__icon {
  width: 22px;
  height: 22px;
  color: var(--lime);
}

.page-about .team-card__title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--white);
}

.page-about .team-card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 覆盖与联系 ---------- */

.page-about .about-section--last {
  padding-bottom: 8px;
}

.page-about .coverage-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 26px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.page-about .coverage-figure {
  background: rgba(10, 26, 20, 0.9);
  padding: 16px;
}

.page-about .coverage-figure__num {
  display: block;
  font-size: 30px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--lime);
}

.page-about .coverage-figure__label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .coverage-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-about .contact-panel {
  margin-top: 30px;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--orange);
  border-radius: 0 14px 14px 0;
  background: linear-gradient(150deg, rgba(15, 42, 32, 0.9), rgba(6, 11, 9, 0.92));
  box-shadow: var(--shadow-panel);
}

.page-about .contact-panel__title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 19px;
  color: var(--white);
}

.page-about .contact-panel__text {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.page-about .contact-panel__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .contact-panel__row {
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-about .contact-panel__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .contact-panel__label {
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-about .contact-panel__value {
  font-size: 14px;
  color: var(--mist);
  word-break: break-word;
}

.page-about .contact-panel__cta {
  margin-top: 20px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .hero-stats__value {
    font-size: 27px;
  }

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

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

@media (min-width: 860px) {
  .page-about .about-hero {
    padding: 34px 0 66px;
  }

  .page-about .about-hero__lede {
    font-size: 16.5px;
  }

  .page-about .scene-item {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 20px;
    padding: 24px 0;
  }

  .page-about .scene-item:nth-child(even) {
    padding-left: 40px;
  }

  .page-about .flow-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
    gap: 30px;
  }

  .page-about .team-grid {
    grid-template-columns: 250px minmax(0, 1fr);
    align-items: start;
    gap: 24px;
  }

  .page-about .contact-panel {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 12px 30px;
    align-items: start;
    padding: 26px 24px;
  }

  .page-about .contact-panel__list {
    margin-top: 0;
  }

  .page-about .contact-panel__cta {
    grid-column: 2;
    justify-self: start;
    margin-top: 4px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 46px;
    padding: 54px 0 84px;
  }

  .page-about .about-index {
    position: sticky;
    top: 120px;
    border-top: 1px solid var(--line);
  }

  .page-about .about-index__nav {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__link {
    border-radius: 8px;
    white-space: normal;
  }

  .page-about .about-index__link + .about-index__link {
    margin-top: 6px;
  }

  .page-about .about-flow {
    gap: 64px;
  }

  .page-about .about-section--last {
    padding-bottom: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .version-node,
  .page-about .version-node__type,
  .page-about .team-card {
    transition: none;
  }

  .page-about .version-node:hover,
  .page-about .version-node:focus-within {
    transform: none;
  }
}
<<<END>>>