.page-about {
  background: var(--ink-900);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about .bx-section {
  padding-block: clamp(40px, 7vw, 88px);
}

/* ---------- 面包屑 ---------- */
.page-about .bx-breadcrumb {
  padding-top: clamp(20px, 3vw, 32px);
  font-size: 13px;
}

/* ---------- 首屏 ---------- */
.page-about .bx-about-cover {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: end;
  padding: clamp(24px, 4vw, 48px) 0 clamp(32px, 5vw, 64px);
}

.page-about .bx-about-cover__title {
  margin: 14px 0 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(34px, 6.4vw, 76px);
  line-height: 1.08;
  letter-spacing: 0.04em;
}

.page-about .bx-about-cover__lede {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .bx-about-cover__figure {
  position: relative;
  margin: 0;
  aspect-ratio: auto;
}

.page-about .bx-about-cover__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1100 / 760;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-about .bx-about-cover {
    grid-template-columns: minmax(0, 1fr) minmax(300px, 400px);
  }
}

/* ---------- 章节导读 ---------- */
.page-about .bx-about-toc {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 22px;
  padding: 16px 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.page-about .bx-about-toc__label {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-about .bx-about-toc__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  margin: 0;
  padding: 0;
}

.page-about .bx-about-toc__list a {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 14px;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .bx-about-toc__list a:hover,
.page-about .bx-about-toc__list a[aria-current="true"] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 开篇自述 ---------- */
.page-about .bx-about-origin__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-about .bx-about-origin__title {
  margin: 10px 0 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(25px, 3.2vw, 36px);
  line-height: 1.25;
  letter-spacing: 0.02em;
}

.page-about .bx-about-origin__pull {
  margin: 22px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--orange);
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.7;
  color: var(--paper);
}

.page-about .bx-about-origin__body p {
  margin: 0 0 1.1em;
  line-height: 1.9;
  color: var(--paper);
}

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

@media (min-width: 900px) {
  .page-about .bx-about-origin__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: clamp(32px, 5vw, 72px);
  }
}

/* ---------- 时间轴 ---------- */
.page-about .bx-about-path__head {
  margin-bottom: clamp(28px, 4vw, 48px);
  max-width: 44em;
}

.page-about .bx-about-path__lede {
  margin: 12px 0 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .bx-about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .bx-about-timeline::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 5px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--cyan-deep) 50%, var(--orange) 100%);
  opacity: 0.55;
}

.page-about .bx-about-tl {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 0 0 clamp(26px, 4vw, 44px) 30px;
}

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

.page-about .bx-about-tl::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  background: var(--ink-900);
  transition: background-color 0.5s var(--ease), box-shadow 0.5s var(--ease);
}

.page-about .bx-about-tl.is-visible::before {
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(31, 224, 192, 0.16);
}

.page-about .bx-about-tl__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .bx-about-tl__body h3 {
  margin: 0 0 10px;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(18px, 2.2vw, 22px);
  letter-spacing: 0.02em;
  line-height: 1.35;
}

.page-about .bx-about-tl__body p {
  margin: 0 0 10px;
  line-height: 1.85;
  font-size: 15px;
  color: var(--paper);
}

.page-about .bx-about-tl__body .bx-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .bx-about-path__figure {
  margin: clamp(28px, 5vw, 52px) 0 0;
  aspect-ratio: auto;
}

.page-about .bx-about-path__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1400 / 480;
  object-fit: cover;
}

@media (min-width: 860px) {
  .page-about .bx-about-timeline::before {
    left: 169px;
  }

  .page-about .bx-about-tl {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 40px;
    padding-left: 0;
  }

  .page-about .bx-about-tl::before {
    left: 164px;
    top: 8px;
  }

  .page-about .bx-about-tl__year {
    font-size: 18px;
    letter-spacing: 0.2em;
    text-align: right;
    padding-top: 2px;
  }
}

/* ---------- 数据条 ---------- */
.page-about .bx-about-scale__title {
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 30px);
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.page-about .bx-about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--ink-700);
  border: 2px solid var(--ink-700);
  box-shadow: var(--shadow-hard);
}

.page-about .bx-about-stats__item {
  background: var(--ink-800);
  padding: clamp(16px, 2.6vw, 28px);
}

.page-about .bx-about-stats__value {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(23px, 3.2vw, 36px);
  letter-spacing: 0.04em;
  line-height: 1.1;
  color: var(--paper);
}

.page-about .bx-about-stats__value span {
  margin-left: 4px;
  font-size: 0.45em;
  letter-spacing: 0.06em;
  color: var(--orange);
}

.page-about .bx-about-stats__label {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

@media (min-width: 820px) {
  .page-about .bx-about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 四个小组 ---------- */
.page-about .bx-about-team__head {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
  margin-bottom: clamp(26px, 4vw, 44px);
  align-items: end;
}

.page-about .bx-about-team__lede {
  margin: 12px 0 0;
  max-width: 30em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .bx-about-team__figure {
  margin: 0;
  aspect-ratio: auto;
}

.page-about .bx-about-team__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-about .bx-about-team__head {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 380px);
  }
}

.page-about .bx-about-units {
  display: grid;
  gap: 18px;
}

.page-about .bx-about-unit {
  border: 2px solid var(--ink-700);
  background: var(--ink-800);
  box-shadow: var(--shadow-hard);
  transition: box-shadow 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .bx-about-unit:hover,
.page-about .bx-about-unit:focus-within {
  box-shadow: var(--shadow-hard-lift);
  transform: translate(-2px, -2px);
}

.page-about .bx-about-unit__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: clamp(16px, 2.4vw, 22px);
  cursor: pointer;
  list-style: none;
}

.page-about .bx-about-unit__head::-webkit-details-marker {
  display: none;
}

.page-about .bx-about-unit__num {
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .bx-about-unit__name {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(18px, 2.2vw, 21px);
  letter-spacing: 0.02em;
}

.page-about .bx-about-unit__body {
  padding: 0 clamp(16px, 2.4vw, 22px) clamp(18px, 2.4vw, 24px);
}

.page-about .bx-about-unit__body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper);
}

.page-about .bx-about-unit__body .bx-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .bx-about-unit__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--hairline);
}

.page-about .bx-about-unit__body a:hover {
  border-bottom-color: var(--cyan);
}

@media (min-width: 780px) {
  .page-about .bx-about-units {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }
}

/* ---------- 合作与认可（暖白反转块） ---------- */
.page-about .bx-about-partners {
  margin-block: clamp(40px, 7vw, 88px);
  padding: clamp(24px, 4.5vw, 56px);
  background: var(--paper);
  color: var(--ink-900);
  border: 2px solid var(--ink-700);
  box-shadow: var(--shadow-hard);
}

.page-about .bx-about-partners__eyebrow {
  color: var(--cyan-deep);
}

.page-about .bx-about-partners h2 {
  margin: 10px 0 clamp(20px, 3vw, 32px);
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(23px, 3.2vw, 34px);
  letter-spacing: 0.02em;
  line-height: 1.3;
  color: var(--ink-900);
}

.page-about .bx-about-partners__grid {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
}

.page-about .bx-about-partners__item .bx-mono {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan-deep);
}

.page-about .bx-about-partners__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--ink-900);
}

.page-about .bx-about-partners__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-900);
}

.page-about .bx-about-partners__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding-top: clamp(16px, 2.4vw, 22px);
  border-top: 1px solid rgba(22, 39, 62, 0.24);
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-900);
}

.page-about .bx-about-partners__note a {
  color: var(--ink-900);
  text-decoration: none;
  border-bottom: 2px solid var(--orange);
}

.page-about .bx-about-partners__note a:hover {
  color: var(--cyan-deep);
}

@media (min-width: 820px) {
  .page-about .bx-about-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 我们的做法 ---------- */
.page-about .bx-about-principles__head {
  margin-bottom: clamp(26px, 4vw, 44px);
  max-width: 42em;
}

.page-about .bx-about-principles__lede {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .bx-about-rules {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-about .bx-about-rule {
  padding-left: clamp(16px, 2.4vw, 24px);
  border-left: 2px solid var(--ink-700);
  transition: border-color 0.24s var(--ease);
}

.page-about .bx-about-rule:hover {
  border-left-color: var(--cyan);
}

.page-about .bx-about-rule__num {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.page-about .bx-about-rule h3 {
  margin: 0 0 10px;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(17px, 2vw, 20px);
  letter-spacing: 0.02em;
  line-height: 1.4;
}

.page-about .bx-about-rule p {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--paper);
}

.page-about .bx-about-rule a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--hairline);
}

.page-about .bx-about-rule a:hover {
  border-bottom-color: var(--cyan);
}

@media (min-width: 820px) {
  .page-about .bx-about-rules {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 收尾动作 ---------- */
.page-about .bx-about-cta {
  display: grid;
  gap: 18px;
  margin-top: clamp(32px, 5vw, 56px);
  padding-top: clamp(24px, 4vw, 40px);
  border-top: 2px solid var(--ink-700);
}

.page-about .bx-about-cta__text {
  margin: 0;
  max-width: 30em;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.75;
}

.page-about .bx-about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 760px) {
  .page-about .bx-about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .bx-about-tl::before,
  .page-about .bx-about-unit,
  .page-about .bx-about-rule,
  .page-about .bx-about-toc__list a {
    transition: none;
  }

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