.page-about {
  --about-gap: 40px;
  --about-line: 20px;
  --about-hair: rgba(36, 48, 43, .9);
  background: var(--gd-black);
  color: var(--gd-paper);
  overflow-x: clip;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 32px 0 clamp(48px, 8vw, 96px);
  background:
    radial-gradient(120% 90% at 82% 0%, rgba(31, 122, 77, .28), transparent 62%),
    linear-gradient(180deg, #0d1512 0%, var(--gd-black) 78%);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(36, 48, 43, .55) 1px, transparent 1px),
    repeating-linear-gradient(to bottom, rgba(36, 48, 43, .28) 0 1px, transparent 1px 4px);
  background-size: 96px 100%, 100% 100%;
}

.page-about .about-hero__cut {
  position: absolute;
  top: -24%;
  right: -14%;
  z-index: 0;
  width: 78%;
  height: 148%;
  background: var(--gd-field);
  opacity: .8;
  clip-path: polygon(46% 0, 100% 0, 100% 100%, 0 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
}

.page-about .about-hero .gd-breadcrumb {
  margin-bottom: 28px;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  max-width: 15em;
  font-family: var(--gd-font-body);
  font-weight: 900;
  font-size: clamp(32px, 7.2vw, 74px);
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--gd-paper);
}

.page-about .about-hero__lead {
  margin: 24px 0 0;
  max-width: 30em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--gd-gray);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: 1fr;
  margin: clamp(32px, 5vw, 48px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-hero__fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-hero__fact-num {
  font-family: var(--gd-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 22px;
  letter-spacing: .02em;
  color: var(--gd-signal);
}

.page-about .about-hero__fact-label {
  font-size: 14px;
  color: var(--gd-gray);
}

/* ============ 通用章节骨架 ============ */
.page-about .about-section {
  padding: clamp(56px, 8vw, 116px) 0;
}

.page-about .about-section + .about-section {
  border-top: 1px solid var(--about-hair);
}

.page-about .about-section__inner {
  display: grid;
  gap: 20px;
}

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

.page-about .about-section__no {
  font-family: var(--gd-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--gd-grass);
}

.page-about .about-section__tag {
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--gd-gray);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--gd-font-body);
  font-weight: 900;
  font-size: clamp(26px, 4.4vw, 44px);
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--gd-paper);
}

.page-about .about-lede {
  margin: 18px 0 0;
  max-width: 32em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--gd-gray);
}

/* ============ 团队 ============ */
.page-about .about-team {
  display: grid;
  gap: 32px;
  margin-top: clamp(32px, 5vw, 48px);
}

.page-about .about-roles {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-roles__item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  padding: 24px 0;
  border-top: 1px solid var(--about-hair);
  transition: background-color 200ms var(--gd-ease);
}

.page-about .about-roles__item:last-child {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-roles__count {
  font-family: var(--gd-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  line-height: 1;
  color: var(--gd-signal);
}

.page-about .about-roles__name {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  color: var(--gd-paper);
}

.page-about .about-roles__desc {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--gd-gray);
}

.page-about .about-roles__fields {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px dashed rgba(36, 48, 43, 1);
  font-family: var(--gd-font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  line-height: 1.7;
  color: rgba(155, 166, 160, .55);
  transition: color 220ms var(--gd-ease);
}

.page-about .about-roles__item:hover,
.page-about .about-roles__item:focus-within {
  background: rgba(16, 36, 28, .5);
}

.page-about .about-roles__item:hover .about-roles__fields,
.page-about .about-roles__item:focus-within .about-roles__fields {
  color: var(--gd-teal);
}

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-team__figure .gd-media {
  border-radius: var(--gd-radius-l);
}

/* ============ 工序 ============ */
.page-about .about-flow {
  display: grid;
  gap: 0;
  margin: clamp(32px, 5vw, 48px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-flow__step {
  padding: 26px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-flow__no {
  display: block;
  font-family: var(--gd-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--gd-grass);
}

.page-about .about-flow__title {
  margin: 10px 0 0;
  font-size: 19px;
  font-weight: 700;
  color: var(--gd-paper);
}

.page-about .about-flow__desc {
  margin: 8px 0 0;
  max-width: 30em;
  font-size: 15px;
  line-height: 1.72;
  color: var(--gd-gray);
}

.page-about .about-flow__who {
  display: inline-block;
  margin-top: 14px;
  padding: 4px 10px;
  border: 1px solid var(--about-hair);
  border-radius: 999px;
  font-family: var(--gd-font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--gd-data);
}

.page-about .about-flow__more,
.page-about .about-correct__more,
.page-about .about-partner__more {
  margin: 24px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gd-gray);
}

.page-about .about-flow__more a,
.page-about .about-correct__more a,
.page-about .about-partner__more a {
  color: var(--gd-signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 209, 102, .45);
}

.page-about .about-flow__more a:hover,
.page-about .about-correct__more a:hover,
.page-about .about-partner__more a:hover {
  border-bottom-color: var(--gd-signal);
}

/* ============ 演进时间线 ============ */
.page-about .about-history {
  position: relative;
  overflow: hidden;
}

.page-about .about-history__bg {
  position: absolute;
  top: 0;
  right: -14%;
  width: min(560px, 62%);
  height: 100%;
  opacity: .07;
  pointer-events: none;
}

.page-about .about-history__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.page-about .about-timeline-wrap {
  position: relative;
  margin-top: clamp(40px, 6vw, 72px);
  padding-left: var(--about-gap);
}

.page-about .about-timeline__rail {
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: var(--about-line);
  width: 2px;
  height: auto;
  color: var(--gd-line);
}

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

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 44px;
  scroll-margin-top: calc(var(--gd-header-h) + 28px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: 8px;
  left: calc(var(--about-line) - var(--about-gap) - 4px);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gd-signal);
  box-shadow: 0 0 0 4px rgba(255, 209, 102, .14);
}

.page-about .about-timeline__year {
  display: inline-block;
  font-family: var(--gd-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--gd-signal);
  text-decoration: none;
}

.page-about .about-timeline__year:hover {
  color: var(--gd-paper);
}

.page-about .about-timeline__name {
  margin: 10px 0 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--gd-paper);
}

.page-about .about-timeline__body p {
  margin: 10px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gd-gray);
}

/* ============ 版本对比 ============ */
.page-about .about-versions {
  margin-top: clamp(48px, 7vw, 80px);
  padding-top: 32px;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-versions__heading {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--gd-paper);
}

.page-about .about-versions__filter {
  margin-top: 18px;
}

.page-about .about-versions__list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-versions__row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px 14px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-versions__field {
  font-size: 15px;
  font-weight: 500;
  color: var(--gd-paper);
}

.page-about .about-versions__desc {
  grid-column: 2;
  font-size: 14px;
  line-height: 1.7;
  color: var(--gd-gray);
}

/* ============ 纠错 ============ */
.page-about .about-correct {
  display: grid;
  gap: 0;
  margin-top: clamp(32px, 5vw, 48px);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-correct__cell {
  padding: 26px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-correct__num {
  display: block;
  font-family: var(--gd-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 44px;
  line-height: 1;
  color: var(--gd-signal);
}

.page-about .about-correct__name {
  margin: 12px 0 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--gd-paper);
}

.page-about .about-correct__cell p {
  margin: 10px 0 0;
  max-width: 28em;
  font-size: 14px;
  line-height: 1.72;
  color: var(--gd-gray);
}

/* ============ 协作 ============ */
.page-about .about-partner {
  display: grid;
  gap: 32px;
  margin-top: clamp(32px, 5vw, 48px);
}

.page-about .about-partner__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partner__item {
  padding: 22px 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-partner__item:last-child {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-partner__item h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--gd-paper);
}

.page-about .about-partner__item p {
  margin: 10px 0 0;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.74;
  color: var(--gd-gray);
}

.page-about .about-partner__aside {
  padding: 24px;
  border: 1px solid var(--about-hair);
  border-radius: var(--gd-radius-s);
  background: var(--gd-field);
}

.page-about .about-partner__aside-text {
  margin: 12px 0 20px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--gd-gray);
}

/* ============ 收束 ============ */
.page-about .about-close {
  margin-top: clamp(56px, 8vw, 116px);
  padding: clamp(56px, 8vw, 108px) 0;
  background:
    radial-gradient(90% 70% at 12% 100%, rgba(31, 122, 77, .32), transparent 66%),
    var(--gd-field);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-close__inner {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .about-close__figure {
  max-width: 300px;
}

.page-about .about-close__title {
  margin: 12px 0 0;
  max-width: 18em;
  font-family: var(--gd-font-body);
  font-weight: 900;
  font-size: clamp(24px, 4vw, 40px);
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--gd-paper);
}

.page-about .about-close__text p {
  margin: 18px 0 0;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--gd-gray);
}

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ============ 断点 ============ */
@media (min-width: 720px) {
  .page-about {
    --about-gap: 64px;
  }

  .page-about .about-hero {
    padding-top: 40px;
  }

  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-bottom: 1px solid var(--about-hair);
  }

  .page-about .about-hero__fact {
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 10px;
    padding: 20px 20px 22px 0;
    border-bottom: 0;
    border-right: 1px solid var(--about-hair);
  }

  .page-about .about-hero__fact:last-child {
    border-right: 0;
  }

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

  .page-about .about-flow__step:nth-child(odd) {
    padding-right: 32px;
    border-right: 1px solid var(--about-hair);
  }

  .page-about .about-flow__step:nth-child(even) {
    padding-left: 32px;
  }

  .page-about .about-versions__row {
    grid-template-columns: 58px 180px minmax(0, 1fr);
    align-items: center;
  }

  .page-about .about-versions__desc {
    grid-column: 3;
  }

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

  .page-about .about-correct__cell {
    padding: 26px 26px 26px 0;
    border-bottom: 0;
    border-right: 1px solid var(--about-hair);
  }

  .page-about .about-correct__cell:last-child {
    padding-right: 0;
    border-right: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-partner {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-close__inner {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 64px;
  }
}

@media (min-width: 1040px) {
  .page-about .about-section__inner {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 48px;
  }

  .page-about .about-section__side {
    position: sticky;
    top: calc(var(--gd-header-h) + 36px);
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .page-about .about-section__no {
    font-size: 14px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-roles__item {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 24px;
  }

  .page-about .about-timeline__item:nth-child(even) {
    padding-left: 72px;
  }

  .page-about .about-timeline__item:nth-child(odd) .about-timeline__body p {
    max-width: 38em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-roles__item,
  .page-about .about-roles__fields {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>