.page-about {
  --pa-gap: 20px;
  --pa-hair: rgba(0, 240, 200, 0.2);
  --pa-soft: rgba(221, 230, 239, 0.1);
  --pa-body: rgba(221, 230, 239, 0.82);
  --pa-body-dim: rgba(221, 230, 239, 0.7);
  background-color: var(--ink-900);
  background-image:
    repeating-linear-gradient(0deg, rgba(221, 230, 239, 0.04) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(90deg, rgba(221, 230, 239, 0.04) 0 1px, transparent 1px 72px);
  color: var(--ice);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .mono {
  font-family: var(--font-data);
}

/* ---------- 面包屑 ---------- */

.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--mist);
  padding: 0;
  margin: 0 0 30px;
}

.page-about .about-crumbs a {
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-top: calc(var(--header-h) + 26px);
  padding-bottom: 0;
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 42px;
  align-items: end;
}

.page-about .about-eyebrow {
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--cyan);
  margin: 0 0 18px;
  padding-left: 14px;
  border-left: 2px solid var(--orange);
  line-height: 1.4;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.05rem, 8.4vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.005em;
  color: var(--paper);
  margin: 0 0 22px;
}

.page-about .about-hero__lead {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--pa-body);
  margin: 0 0 30px;
  max-width: 46ch;
}

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

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  padding: 0 14px 14px 0;
}

.page-about .about-hero__figure::before {
  content: "";
  position: absolute;
  inset: 18px 0 0 18px;
  background: linear-gradient(140deg, rgba(0, 240, 200, 0.16), rgba(255, 138, 61, 0.1));
  border: 1px solid var(--pa-hair);
  z-index: 0;
}

.page-about .about-hero__figure img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid rgba(0, 240, 200, 0.34);
  filter: saturate(0.92) contrast(1.04);
}

.page-about .about-hero__caption {
  position: relative;
  z-index: 1;
  font-size: 12px;
  line-height: 1.75;
  color: var(--mist);
  margin-top: 12px;
  padding-left: 12px;
  border-left: 1px solid var(--pa-hair);
}

/* ---------- 章节索引 ---------- */

.page-about .about-index {
  margin-top: 56px;
  border-top: 1px solid var(--pa-soft);
  border-bottom: 1px solid var(--pa-soft);
  background: rgba(4, 21, 19, 0.62);
}

.page-about .about-index__list {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 12px 0;
  scrollbar-width: none;
}

.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
  white-space: nowrap;
  padding: 9px 15px;
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid transparent;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.page-about .about-index__list a .mono {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan-dim);
  transition: color 0.2s ease;
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-index__list a:hover .mono,
.page-about .about-index__list a:focus-visible .mono {
  color: var(--ink-900);
}

/* ---------- 章节骨架 ---------- */

.page-about .about-section {
  padding: 64px 0;
  border-bottom: 1px solid var(--pa-soft);
}

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

.page-about .about-aside {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-aside__num {
  display: inline-block;
  align-self: flex-start;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ink-900);
  background: var(--cyan);
  padding: 4px 10px;
  margin: 0;
}

.page-about .about-aside__label {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: var(--paper);
  margin: 0;
}

.page-about .about-aside__note {
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--mist);
  margin: 0;
  padding-left: 12px;
  border-left: 1px solid var(--pa-hair);
}

.page-about .about-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.55rem, 5.2vw, 2.6rem);
  line-height: 1.14;
  letter-spacing: 0.005em;
  color: var(--paper);
  margin: 0 0 22px;
}

.page-about .about-text {
  font-size: 1rem;
  line-height: 1.88;
  color: var(--pa-body);
  margin: 0 0 20px;
  max-width: 62ch;
}

.page-about .about-text--tight {
  margin-top: 30px;
  margin-bottom: 0;
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  list-style: none;
  margin: 34px 0 0;
  padding: 0 0 0 30px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--cyan-dim) 44%, var(--rust) 100%);
  opacity: 0.6;
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 22px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 15px;
  width: 10px;
  height: 10px;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 138, 61, 0.16);
}

.page-about .about-timeline__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
}

.page-about .about-timeline__year {
  flex: 0 0 auto;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .about-timeline__toggle {
  flex: 1 1 240px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 13px 16px;
  background: rgba(11, 42, 36, 0.68);
  border: 1px solid var(--pa-hair);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.page-about .about-timeline__toggle:hover,
.page-about .about-timeline__toggle:focus-visible {
  border-color: var(--cyan);
  background: rgba(0, 240, 200, 0.09);
  transform: translateX(3px);
}

.page-about .about-timeline__mark {
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: 15px;
  color: var(--cyan);
}

.page-about .about-timeline__panel {
  padding: 14px 16px 0 2px;
}

.page-about .about-timeline__panel p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--pa-body-dim);
  max-width: 60ch;
}

/* ---------- 数据指标 ---------- */

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 30px 0 38px;
}

.page-about .about-metric {
  border: 1px solid var(--pa-hair);
  border-top: 3px solid var(--cyan);
  background: rgba(11, 42, 36, 0.6);
  padding: 16px 14px 18px;
}

.page-about .about-metric__value {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(1.45rem, 5vw, 1.95rem);
  line-height: 1;
  color: var(--cyan);
  margin-bottom: 10px;
}

.page-about .about-metric__label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.07em;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 四条内容线 ---------- */

.page-about .about-pillars {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-pillar {
  border: 1px solid var(--pa-soft);
  border-left: 3px solid var(--cyan-dim);
  background: rgba(4, 21, 19, 0.58);
  padding: 20px 18px 22px;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.page-about .about-pillar:hover {
  transform: translate(-3px, -3px);
  border-color: var(--cyan);
  box-shadow: var(--shadow-cyan);
}

.page-about .about-pillar__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  color: var(--paper);
  margin: 0 0 12px;
}

.page-about .about-pillar__text {
  font-size: 0.93rem;
  line-height: 1.85;
  color: var(--pa-body-dim);
  margin: 0;
}

/* ---------- 图片框 ---------- */

.page-about .about-media {
  margin: 36px 0 0;
  border: 2px solid rgba(0, 240, 200, 0.22);
  background: rgba(4, 21, 19, 0.62);
  padding: 12px;
}

.page-about .about-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--pa-soft);
}

.page-about .about-media figcaption {
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--mist);
  padding-top: 12px;
}

.page-about .about-media--portrait {
  max-width: 380px;
}

.page-about .about-media--wide {
  margin-bottom: 34px;
}

/* ---------- 团队事实清单 ---------- */

.page-about .about-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--pa-soft);
}

.page-about .about-facts li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 17px 0;
  border-bottom: 1px solid var(--pa-soft);
}

.page-about .about-facts__k {
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-facts__v {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--pa-body);
}

/* ---------- 荣誉 ---------- */

.page-about .about-honors {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 30px;
}

.page-about .about-honor {
  position: relative;
  border: 2px solid rgba(0, 240, 200, 0.22);
  background: linear-gradient(158deg, rgba(11, 42, 36, 0.92), rgba(4, 21, 19, 0.92));
  padding: 24px 22px 26px;
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-honor::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s ease;
}

.page-about .about-honor:hover,
.page-about .about-honor:focus-within {
  transform: translate(-4px, -4px);
  border-color: var(--cyan);
  box-shadow: var(--shadow-orange);
}

.page-about .about-honor:hover::after,
.page-about .about-honor:focus-within::after {
  transform: scaleX(1);
}

.page-about .about-honor__year {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange);
  margin: 0 0 14px;
}

.page-about .about-honor__name {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.25rem;
  line-height: 1.3;
  letter-spacing: 0.03em;
  color: var(--paper);
  margin: 0 0 12px;
}

.page-about .about-honor__desc {
  font-size: 0.93rem;
  line-height: 1.82;
  color: var(--pa-body-dim);
  margin: 0;
}

.page-about .about-honor__meta {
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--mist);
  margin: 18px 0 0;
  transition: color 0.25s ease;
}

.page-about .about-honor:hover .about-honor__meta,
.page-about .about-honor:focus-within .about-honor__meta {
  color: var(--orange);
}

/* ---------- 结尾 ---------- */

.page-about .about-cta {
  padding: 62px 0 76px;
  background: linear-gradient(180deg, rgba(4, 21, 19, 0) 0%, rgba(0, 240, 200, 0.07) 100%);
}

.page-about .about-cta__box {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  border: 2px solid var(--cyan);
  background: var(--ink-800);
  box-shadow: var(--shadow-cyan);
  padding: 30px 22px 32px;
}

.page-about .about-cta__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.5rem, 5vw, 2.2rem);
  line-height: 1.14;
  color: var(--paper);
  margin: 0 0 14px;
}

.page-about .about-cta__text {
  font-size: 0.97rem;
  line-height: 1.85;
  color: var(--pa-body);
  margin: 0;
  max-width: 52ch;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

/* ---------- 平板与桌面 ---------- */

@media (min-width: 640px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-facts li {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 22px;
    align-items: baseline;
  }

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

@media (min-width: 920px) {
  .page-about .about-hero {
    padding-top: calc(var(--header-h) + 44px);
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 60px;
  }

  .page-about .about-hero__lead {
    font-size: 1.05rem;
  }

  .page-about .about-index {
    margin-top: 72px;
  }

  .page-about .about-section {
    padding: 88px 0;
  }

  .page-about .about-split {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 58px;
    align-items: start;
  }

  .page-about .about-aside {
    position: sticky;
    top: calc(var(--header-h) + 30px);
  }

  .page-about .about-media--portrait {
    margin-top: 44px;
  }

  .page-about .about-cta {
    padding: 80px 0 96px;
  }

  .page-about .about-cta__box {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
    gap: 44px;
    padding: 46px 42px;
  }

  .page-about .about-cta__links {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (min-width: 1180px) {
  .page-about .about-split {
    grid-template-columns: 214px minmax(0, 1fr);
    gap: 76px;
  }
}
<<<END>>>
</main>