.page-about {
  background: var(--bx-paper);
  color: var(--bx-on-light);
  --about-rule: 1px solid var(--bx-line-dark);
}

.page-about p {
  margin: 0 0 1rem;
  font-size: 0.98rem;
  line-height: 1.8;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--bx-ink);
  color: var(--bx-paper);
  padding: 26px 0 38px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: 42%;
  right: -12%;
  top: -30%;
  height: 380px;
  background: radial-gradient(circle at 32% 46%, rgba(14, 124, 114, 0.72), transparent 66%);
  transform: rotate(-9deg);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--bx-lime) 0 18%, var(--bx-jade) 18% 52%, var(--bx-coral) 52% 58%, transparent 58%);
}

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

.page-about .bx-crumb {
  margin-bottom: 18px;
  font-size: 0.78rem;
}

.page-about .about-hero .bx-eyebrow {
  color: var(--bx-lime);
}

.page-about .about-hero h1 {
  font-family: var(--bx-font-display);
  font-weight: 900;
  font-size: clamp(1.95rem, 6.4vw, 3.35rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0.4rem 0 0;
  max-width: 20ch;
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 52ch;
  color: var(--bx-on-dark);
  font-size: 1rem;
  line-height: 1.85;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--bx-line-light);
}

.page-about .about-hero__facts li {
  padding: 14px 0;
  border-bottom: 1px solid var(--bx-line-light);
}

.page-about .about-fact__num {
  display: block;
  font-family: var(--bx-font-mono);
  font-size: 1.55rem;
  font-weight: 600;
  line-height: 1.1;
  color: var(--bx-lime);
}

.page-about .about-fact__label {
  display: block;
  margin-top: 6px;
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--bx-on-dark-soft);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  padding-top: 34px;
  padding-bottom: 60px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

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

.page-about .about-nav .bx-toc__title {
  margin: 0 0 10px;
  font-family: var(--bx-font-sans);
  font-weight: 700;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: var(--bx-jade-deep);
  transform: skewX(-2deg);
}

.page-about .about-nav .bx-toc__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

.page-about .about-nav .bx-toc__link {
  display: block;
  white-space: nowrap;
  padding: 7px 12px;
  border: 1px solid var(--bx-line-dark);
  background: var(--bx-card);
  font-size: 0.82rem;
  color: var(--bx-ink);
  text-decoration: none;
  transition: border-color 0.2s var(--bx-ease), background-color 0.2s var(--bx-ease);
}

.page-about .about-nav .bx-toc__link:hover,
.page-about .about-nav .bx-toc__link:focus-visible,
.page-about .about-nav .bx-toc__link[aria-current="true"] {
  border-color: var(--bx-jade);
  background: var(--bx-mist);
  outline: none;
}

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

/* ---------- 章节 ---------- */
.page-about .about-sec {
  padding-bottom: 46px;
  margin-bottom: 42px;
  border-bottom: var(--about-rule);
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 20px;
  border-bottom: var(--about-rule);
}

.page-about .about-sec__no {
  font-family: var(--bx-font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--bx-jade);
  letter-spacing: 0.06em;
}

.page-about .about-sec .bx-section-title {
  margin: 0;
  font-family: var(--bx-font-display);
  font-weight: 900;
  font-size: clamp(1.35rem, 4.4vw, 2rem);
  line-height: 1.3;
  color: var(--bx-ink);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 26px 0 8px;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--bx-line-dark);
}

.page-about .about-timeline > li {
  position: relative;
  padding-bottom: 26px;
}

.page-about .about-timeline > li:last-child {
  padding-bottom: 4px;
}

.page-about .about-timeline > li::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--bx-jade);
  transition: background-color 0.2s var(--bx-ease), transform 0.2s var(--bx-ease);
}

.page-about .about-timeline > li:hover::before {
  background: var(--bx-coral);
  transform: scale(1.25);
}

.page-about .tl-year {
  display: inline-block;
  font-family: var(--bx-font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--bx-jade-deep);
  letter-spacing: 0.02em;
}

.page-about .tl-title {
  margin: 6px 0 6px;
  font-family: var(--bx-font-sans);
  font-weight: 700;
  font-size: 1rem;
  color: var(--bx-ink);
  transform: skewX(-2deg);
  transform-origin: left center;
}

.page-about .about-timeline p {
  margin: 0;
  font-size: 0.94rem;
}

/* ---------- 图 ---------- */
.page-about .about-figure {
  margin: 28px 0 0;
}

.page-about .about-figure .bx-media {
  border: 1px solid var(--bx-line-dark);
}

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

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--bx-on-dark-soft);
}

/* ---------- 引言 ---------- */
.page-about .about-quote {
  margin: 0 0 20px;
  padding: 4px 0 4px 18px;
  border-left: 4px solid var(--bx-jade);
}

.page-about .about-quote p {
  margin: 0 0 8px;
  font-family: var(--bx-font-display);
  font-weight: 900;
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--bx-ink);
}

.page-about .about-quote cite {
  font-style: normal;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--bx-jade-deep);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 22px 0 4px;
}

.page-about .team-card {
  position: relative;
  background: var(--bx-card);
  border: 1px solid var(--bx-line-dark);
  border-top: 3px solid var(--bx-jade);
  padding: 18px 18px 14px;
  transition: transform 0.2s var(--bx-ease), box-shadow 0.2s var(--bx-ease);
}

.page-about .team-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--bx-shadow);
}

.page-about .team-card__num {
  display: block;
  font-size: 2.3rem;
  color: var(--bx-jade);
  line-height: 1;
}

.page-about .team-card__title {
  margin: 8px 0 4px;
  font-family: var(--bx-font-sans);
  font-weight: 700;
  font-size: 1rem;
  color: var(--bx-ink);
  transform: skewX(-2deg);
  transform-origin: left center;
}

.page-about .team-card__hint {
  margin: 0 0 12px;
  font-size: 0.8rem;
  color: var(--bx-on-dark-soft);
}

.page-about .team-card .bx-acc {
  border-top: var(--about-rule);
  padding-top: 10px;
}

.page-about .team-card .bx-acc__trigger {
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  padding: 6px 22px 6px 0;
  position: relative;
  font-family: var(--bx-font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--bx-jade-deep);
  cursor: pointer;
}

.page-about .team-card .bx-acc__trigger::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--bx-font-mono);
  font-size: 1rem;
  color: var(--bx-jade);
}

.page-about .team-card .bx-acc__trigger[aria-expanded="true"]::after {
  content: "−";
  color: var(--bx-coral);
}

.page-about .team-card .bx-acc__trigger:focus-visible {
  outline: 2px solid var(--bx-lime);
  outline-offset: 2px;
}

.page-about .team-card .bx-acc__panel {
  display: none;
}

.page-about .team-card .bx-acc__panel:has(.bx-acc__body) {
  display: block;
  height: 0;
  overflow: hidden;
}

.page-about .team-card .bx-acc__trigger[aria-expanded="true"] + .bx-acc__panel {
  height: auto;
}

.page-about .team-card .bx-acc__body p {
  margin: 8px 0 0;
  font-size: 0.88rem;
  color: var(--bx-on-light);
}

/* ---------- 合作网络 ---------- */
.page-about .network-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-about .network-steps {
  list-style: none;
  margin: 18px 0 20px;
  padding: 0;
  border-top: var(--about-rule);
}

.page-about .network-steps li {
  padding: 14px 0;
  border-bottom: var(--about-rule);
}

.page-about .network-steps h3 {
  margin: 0 0 6px;
  font-family: var(--bx-font-sans);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--bx-jade-deep);
  transform: skewX(-2deg);
  transform-origin: left center;
}

.page-about .network-steps p {
  margin: 0;
  font-size: 0.92rem;
}

.page-about .network-note {
  font-size: 0.92rem;
}

.page-about .network-note a {
  color: var(--bx-jade-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .network-side {
  background: var(--bx-indigo);
  padding: 14px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .network-side .bx-media {
  border: 1px solid rgba(247, 243, 232, 0.28);
}

.page-about .network-side__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

/* ---------- 节奏 ---------- */
.page-about .cadence {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: var(--about-rule);
}

.page-about .cadence li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 0;
  border-bottom: var(--about-rule);
}

.page-about .cadence__time {
  font-family: var(--bx-font-mono);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--bx-coral);
  letter-spacing: 0.02em;
}

.page-about .cadence__body h3 {
  margin: 0 0 6px;
  font-family: var(--bx-font-sans);
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--bx-ink);
}

.page-about .cadence__body p {
  margin: 0;
  font-size: 0.92rem;
}

.page-about .cadence__body a {
  color: var(--bx-jade-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 安全与服务 ---------- */
.page-about .about-sec--dark {
  background: var(--bx-jade-deep);
  color: var(--bx-paper);
  border-bottom: 0;
  padding: 26px 20px 24px;
}

.page-about .about-sec--dark .about-sec__head {
  border-bottom-color: rgba(247, 243, 232, 0.24);
}

.page-about .about-sec--dark .about-sec__no {
  color: var(--bx-lime);
}

.page-about .about-sec--dark .bx-section-title {
  color: var(--bx-paper);
}

.page-about .about-sec__lead {
  color: var(--bx-on-dark);
  font-size: 0.96rem;
}

.page-about .trust-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: 22px 0 24px;
}

.page-about .trust-item {
  border-top: 1px solid rgba(247, 243, 232, 0.24);
  padding-top: 12px;
}

.page-about .trust-item .bx-num {
  display: block;
  font-size: 2rem;
  line-height: 1;
}

.page-about .trust-item p {
  margin: 8px 0 0;
  font-size: 0.9rem;
  color: var(--bx-on-dark);
}

.page-about .trust-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding-top: 20px;
  border-top: 1px solid rgba(247, 243, 232, 0.24);
}

.page-about .trust-cta__text h3 {
  margin: 0 0 8px;
  font-family: var(--bx-font-sans);
  font-weight: 700;
  font-size: 1rem;
  color: var(--bx-paper);
}

.page-about .trust-cta__text p {
  font-size: 0.9rem;
  color: var(--bx-on-dark);
}

.page-about .trust-cta .bx-copy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 10px 0 0;
  padding: 10px 12px;
  border: 1px solid rgba(247, 243, 232, 0.3);
  background: rgba(11, 31, 42, 0.28);
}

.page-about .trust-cta .bx-copy__value {
  font-family: var(--bx-font-mono);
  font-size: 0.84rem;
  color: var(--bx-paper);
  word-break: break-all;
}

.page-about .trust-cta .bx-copy__action {
  margin-left: auto;
  background: var(--bx-lime);
  color: var(--bx-ink);
  border: 0;
  padding: 6px 12px;
  font-family: var(--bx-font-sans);
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
}

.page-about .trust-cta .bx-copy__action:focus-visible {
  outline: 2px solid var(--bx-paper);
  outline-offset: 2px;
}

.page-about .trust-cta .bx-copy[data-state="copied"] .bx-copy__action {
  background: var(--bx-coral);
  color: var(--bx-paper);
}

.page-about .trust-cta > .bx-btn {
  justify-self: start;
}

/* ---------- 后续入口 ---------- */
.page-about .about-next {
  padding-top: 6px;
}

.page-about .about-next__title {
  margin: 0 0 16px;
  font-family: var(--bx-font-sans);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  color: var(--bx-jade-deep);
  transform: skewX(-2deg);
  transform-origin: left center;
}

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

.page-about .about-next__card {
  position: relative;
  display: block;
  padding: 18px 16px 16px;
  background: var(--bx-card);
  border: 1px solid var(--bx-line-dark);
  text-decoration: none;
  color: var(--bx-ink);
  transition: border-color 0.2s var(--bx-ease), transform 0.2s var(--bx-ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  border-color: var(--bx-lime);
  transform: translateY(-2px);
  outline: none;
}

.page-about .about-next__no {
  font-family: var(--bx-font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--bx-coral);
}

.page-about .about-next__card h3 {
  margin: 8px 0 6px;
  font-family: var(--bx-font-sans);
  font-weight: 700;
  font-size: 1rem;
}

.page-about .about-next__card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--bx-on-light);
}

.page-about .about-next__arrow {
  display: block;
  margin-top: 12px;
  font-family: var(--bx-font-mono);
  font-size: 1.1rem;
  color: var(--bx-jade);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero {
    padding: 34px 0 48px;
  }

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

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

  .page-about .cadence li {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 14px;
    align-items: start;
  }

  .page-about .network-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-body {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: 44px;
    padding-top: 44px;
    padding-bottom: 76px;
  }

  .page-about .about-nav {
    position: sticky;
    top: 26px;
    align-self: start;
    border-right: var(--about-rule);
    padding-right: 16px;
  }

  .page-about .about-nav .bx-toc__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-nav .bx-toc__list li {
    border-bottom: var(--about-rule);
  }

  .page-about .about-nav .bx-toc__link {
    border: 0;
    background: none;
    padding: 10px 0;
    font-size: 0.85rem;
  }

  .page-about .about-nav .bx-toc__link[aria-current="true"] {
    background: none;
    color: var(--bx-jade-deep);
    box-shadow: inset 3px 0 0 var(--bx-jade);
    padding-left: 10px;
  }

  .page-about .about-sec {
    padding-bottom: 54px;
    margin-bottom: 50px;
  }

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

  .page-about .trust-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

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

  .page-about .about-sec--dark {
    padding: 34px 32px 30px;
  }

  .page-about .about-hero__lead {
    font-size: 1.06rem;
  }
}
<<<END>>>