.page-about {
  --ab-pad: 20px;
  --ab-measure: 34em;
  background: var(--night);
  color: var(--mist);
  font-family: var(--sans);
  overflow-x: hidden;
}

@media (min-width: 768px) {
  .page-about {
    --ab-pad: 48px;
  }
}

/* 面包屑 */
.page-about .ab-crumb {
  padding-block: 18px 4px;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-about .breadcrumb__item {
  color: var(--slate);
  text-decoration: none;
}

.page-about .breadcrumb__item[aria-current="page"] {
  color: var(--mint);
}

.page-about .breadcrumb__sep {
  color: var(--grid);
}

/* 首屏 */
.page-about .ab-hero {
  position: relative;
  padding-block: 28px 48px;
  border-bottom: 1px solid var(--grid);
  background:
    radial-gradient(680px 340px at 88% 4%, rgba(43, 224, 138, 0.12), transparent 72%),
    radial-gradient(520px 300px at 4% 96%, rgba(69, 217, 255, 0.08), transparent 70%),
    linear-gradient(to right, rgba(22, 50, 68, 0.5) 1px, transparent 1px) 0 0 / 72px 72px,
    linear-gradient(to bottom, rgba(22, 50, 68, 0.5) 1px, transparent 1px) 0 0 / 72px 72px,
    var(--night);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: 32px;
}

@media (min-width: 900px) {
  .page-about .ab-hero {
    padding-block: 40px 72px;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1fr) 268px;
    gap: 56px;
    align-items: start;
  }
}

.page-about .eyebrow {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .ab-hero__title {
  margin: 14px 0 0;
  font-size: clamp(40px, 8.4vw, 96px);
  font-weight: 900;
  line-height: 0.96;
  letter-spacing: -0.03em;
  color: var(--mist);
}

.page-about .ab-hero__intro {
  margin: 22px 0 0;
  max-width: var(--ab-measure);
  font-size: 16px;
  line-height: 1.78;
  color: var(--slate);
}

@media (min-width: 768px) {
  .page-about .ab-hero__intro {
    font-size: 18px;
  }
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-top: 28px;
}

.page-about .ab-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(69, 217, 255, 0.35);
  padding-bottom: 1px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .ab-link:hover,
.page-about .ab-link:focus-visible {
  color: var(--pass);
  border-color: var(--pass);
}

.page-about .ab-stats {
  margin: 0;
  display: grid;
  border-top: 1px solid var(--grid);
}

.page-about .ab-stats__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--grid);
}

.page-about .ab-stats dt {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-about .ab-stats dd {
  margin: 0;
  font-size: 13px;
  color: var(--slate);
}

.page-about .ab-num {
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--pass);
}

/* 通用章节 */
.page-about .ab-section {
  padding-block: 56px;
  border-top: 1px solid var(--grid);
}

@media (min-width: 768px) {
  .page-about .ab-section {
    padding-block: 88px;
  }
}

.page-about .ab-section--teal {
  background: var(--teal);
}

.page-about .ab-section--indigo {
  background: linear-gradient(180deg, var(--indigo) 0%, var(--night) 92%);
}

.page-about .ab-split {
  display: grid;
  gap: 28px;
}

@media (min-width: 900px) {
  .page-about .ab-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }
}

.page-about .ab-split__aside {
  align-self: start;
}

.page-about .ab-title {
  margin: 14px 0 0;
  font-size: clamp(26px, 4.4vw, 48px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-about .ab-lede {
  margin: 18px 0 0;
  max-width: var(--ab-measure);
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .ab-body p {
  margin: 0 0 16px;
  max-width: var(--ab-measure);
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

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

.page-about .ab-body--tight {
  margin: 24px 0 0;
  font-size: 15px;
  color: var(--slate);
}

.page-about .ab-note {
  margin: 20px 0 0;
  max-width: var(--ab-measure);
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
}

/* 小组分工 */
.page-about .ab-crew {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .ab-crew__item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  column-gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--grid);
}

.page-about .ab-crew__item:last-child {
  border-bottom: 1px solid var(--grid);
}

.page-about .ab-crew__idx {
  grid-row: span 2;
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--cyan);
}

.page-about .ab-crew__item--b .ab-crew__idx {
  color: var(--pass);
}

.page-about .ab-crew__item--c .ab-crew__idx {
  color: var(--amber);
}

.page-about .ab-crew__name {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .ab-crew__desc {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}

/* 图片 */
.page-about .ab-figure {
  margin: 36px 0 0;
}

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

.page-about .ab-figure--texture {
  margin-top: 28px;
  border: 1px solid var(--grid);
}

/* 四个维度 */
.page-about .ab-dims {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .ab-dims__item {
  padding: 18px 0;
  border-top: 1px solid var(--grid);
}

.page-about .ab-dims__item:last-child {
  border-bottom: 1px solid var(--grid);
}

.page-about .ab-dims__k {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--amber);
}

.page-about .ab-dims__item p {
  margin: 8px 0 0;
  max-width: var(--ab-measure);
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* 三级复核 */
.page-about .ab-steps {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(69, 217, 255, 0.22);
}

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

.page-about .ab-steps__item {
  padding: 22px 20px 26px;
  background: rgba(6, 18, 31, 0.55);
}

.page-about .ab-steps__idx {
  display: block;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .ab-steps__name {
  margin: 12px 0 0;
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--mint);
}

.page-about .ab-steps__item p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--slate);
}

.page-about .ab-rhythm {
  display: grid;
  gap: 1px;
  margin-top: 1px;
  background: rgba(69, 217, 255, 0.22);
}

@media (min-width: 820px) {
  .page-about .ab-rhythm {
    grid-template-columns: 200px 200px minmax(0, 1fr);
  }
}

.page-about .ab-rhythm__cell {
  padding: 22px 20px;
  background: rgba(6, 18, 31, 0.55);
}

.page-about .ab-rhythm__num {
  display: block;
  font-family: var(--mono);
  font-size: 40px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--amber);
}

.page-about .ab-rhythm__cell p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .ab-rhythm__text {
  align-self: center;
}

/* 时间线 */
.page-about .ab-timeline {
  list-style: none;
  margin: 32px 0 0;
  padding: 0 0 0 24px;
  border-left: 1px solid var(--grid);
}

.page-about .ab-timeline__item {
  position: relative;
  padding: 0 0 30px 0;
}

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

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--night);
  border: 1px solid var(--cyan);
}

.page-about .ab-timeline__year {
  display: block;
  font-family: var(--mono);
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--pass);
}

.page-about .ab-timeline__body h3 {
  margin: 8px 0 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .ab-timeline__body p {
  margin: 8px 0 0;
  max-width: var(--ab-measure);
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate);
}

@media (min-width: 768px) {
  .page-about .ab-timeline {
    margin-top: 44px;
    padding-left: 40px;
  }

  .page-about .ab-timeline__item {
    display: grid;
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 24px;
    padding-bottom: 40px;
  }

  .page-about .ab-timeline__item::before {
    left: -45px;
    top: 22px;
    width: 9px;
    height: 9px;
  }

  .page-about .ab-timeline__year {
    font-size: 48px;
    line-height: 0.9;
  }

  .page-about .ab-timeline__body h3 {
    margin-top: 0;
    font-size: 20px;
  }
}

/* 协作生态 */
.page-about .ab-eco {
  display: grid;
  gap: 1px;
  margin-top: 36px;
  background: var(--grid);
}

@media (min-width: 768px) {
  .page-about .ab-eco {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .ab-eco__cell {
  padding: 24px 20px 28px;
  background: var(--night);
}

.page-about .ab-eco__num {
  display: block;
  font-family: var(--mono);
  font-size: 44px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--pass);
}

.page-about .ab-eco__label {
  margin: 12px 0 0;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--mint);
}

.page-about .ab-eco__cell p:last-child {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

/* 联系 */
.page-about .ab-contact {
  margin: 0;
  display: grid;
}

.page-about .ab-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  padding: 16px 0;
  border-top: 1px solid var(--grid);
}

.page-about .ab-contact__row:last-child {
  border-bottom: 1px solid var(--grid);
}

.page-about .ab-contact__row dt {
  flex: 0 0 88px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-about .ab-contact__row dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.page-about .ab-contact__value {
  font-family: var(--mono);
  font-size: 15px;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.page-about .ab-copy {
  margin-left: auto;
  padding: 6px 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  background: transparent;
  border: 1px solid var(--grid);
  border-radius: 0;
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .ab-copy:hover,
.page-about .ab-copy:focus-visible {
  color: var(--mint);
  border-color: var(--cyan);
}

.page-about .ab-copy[data-copied] {
  color: var(--pass);
  border-color: var(--pass);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-link,
  .page-about .ab-copy {
    transition: none;
  }
}
<<<END>>>