.page-about {
  --about-space: clamp(56px, 7vw, 96px);
  --about-hair: 1px solid var(--mist);
  background: var(--white);
  color: var(--ink);
  font-size: 16px;
  overflow-x: clip;
}

@media (min-width: 900px) {
  .page-about {
    font-size: 17px;
  }
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: 24px;
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gray);
}

.page-about .breadcrumbs a {
  color: var(--gray);
  text-decoration: none;
  border-bottom: 1px solid var(--mist);
  padding-bottom: 1px;
  transition: color 0.15s var(--ease), border-color 0.15s var(--ease);
}

.page-about .breadcrumbs a:hover {
  color: var(--green-deep);
  border-bottom-color: var(--lime);
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--mist);
}

.page-about .breadcrumbs [aria-current="page"] {
  color: var(--green-deep);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(28px, 4vw, 48px) 0 var(--about-space);
  position: relative;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--mist) 18%, var(--mist) 82%, transparent);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 36px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 8vw, 4.2rem);
  line-height: 1.03;
  letter-spacing: -0.01em;
  margin: 14px 0 0;
  color: var(--green-deep);
  text-wrap: balance;
}

.page-about .hl {
  background-image: linear-gradient(to top, var(--lime) 0, var(--lime) 0.24em, transparent 0.24em);
  background-repeat: no-repeat;
  padding: 0 0.06em;
}

.page-about .about-hero__text {
  margin: 22px 0 0;
  max-width: 46ch;
  line-height: 1.78;
  color: var(--ink);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 34px;
  padding-top: 22px;
  border-top: var(--about-hair);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(1.2rem, 5.4vw, 2rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--green-deep);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.08em;
  color: var(--gray);
}

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

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  filter: saturate(0.9) contrast(1.02);
}

.page-about .about-hero__caption {
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gray);
  border-left: 2px solid var(--lime);
  padding-left: 10px;
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 0 56px;
    align-items: end;
  }

  .page-about .about-hero__figure {
    margin-bottom: 4px;
  }
}

/* ---------- 通用分栏 ---------- */
.page-about .about-section {
  padding: 0 0 var(--about-space);
}

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

.page-about .about-split__aside {
  padding-top: 2px;
}

.page-about .about-split__aside::after {
  content: "";
  display: block;
  width: 46px;
  height: 2px;
  margin-top: 18px;
  background: var(--lime);
}

.page-about .about-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 3.8vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 10px 0 0;
  color: var(--green-deep);
}

.page-about .about-title--light {
  color: var(--white);
}

.page-about .eyebrow {
  color: var(--gray);
}

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

.page-about .about-split__main p {
  margin: 0 0 1.2em;
  line-height: 1.78;
  color: var(--ink);
  max-width: 62ch;
}

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

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 0 56px;
  }
}

/* ---------- 流程条 ---------- */
.page-about .about-pipeline {
  position: relative;
  overflow: hidden;
  background: var(--green-deep);
  color: var(--white);
  padding: var(--about-space) 0;
}

.page-about .about-pipeline::before {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -55%;
  width: 70%;
  height: 420px;
  background: radial-gradient(closest-side, rgba(198, 255, 61, 0.14), transparent 72%);
  pointer-events: none;
}

.page-about .about-pipeline::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 96px;
  background: var(--lime);
}

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

.page-about .about-pipeline__head {
  max-width: 62ch;
}

.page-about .about-pipeline__intro {
  margin: 20px 0 0;
  line-height: 1.78;
  color: rgba(243, 246, 241, 0.82);
}

.page-about .about-steps {
  margin-top: 36px;
}

.page-about .about-steps__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-step {
  display: flex;
  align-items: baseline;
  gap: 10px;
  width: 100%;
  padding: 16px 14px;
  background: rgba(243, 246, 241, 0.05);
  border: 1px solid rgba(243, 246, 241, 0.18);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 15px;
  text-align: left;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: background 0.15s var(--ease), color 0.15s var(--ease), border-color 0.15s var(--ease);
}

.page-about .about-step:hover {
  background: rgba(198, 255, 61, 0.14);
  border-color: rgba(198, 255, 61, 0.5);
}

.page-about .about-step:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.page-about .about-step[aria-selected="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
}

.page-about .about-step__no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  opacity: 0.7;
}

.page-about .about-step__name {
  font-weight: 600;
  letter-spacing: 0.04em;
}

.page-about .about-step-panel {
  margin-top: 28px;
  padding: 6px 0 6px 22px;
  border-left: 2px solid var(--lime);
}

.page-about .about-step-panel__time {
  display: block;
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(1.2rem, 3.4vw, 1.7rem);
  letter-spacing: -0.01em;
  color: var(--lime);
}

.page-about .about-step-panel__text {
  margin: 12px 0 0;
  max-width: 58ch;
  line-height: 1.78;
  color: rgba(243, 246, 241, 0.86);
}

.page-about .about-step-panel__role {
  margin: 14px 0 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: rgba(243, 246, 241, 0.58);
}

@media (min-width: 760px) {
  .page-about .about-steps__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
  }
}

/* ---------- 团队矩阵 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 30px;
}

.page-about .team-cell {
  padding: 18px;
  border: var(--about-hair);
  border-left: 2px solid var(--green-pitch);
  background: #ffffff;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .team-cell:hover {
  background: var(--lime);
  border-color: var(--lime);
  border-left-color: var(--green-deep);
}

.page-about .team-cell__role {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.06rem;
  letter-spacing: 0.02em;
  color: var(--green-deep);
}

.page-about .team-cell__size {
  display: block;
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.5rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .team-cell__duty {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--gray);
}

.page-about .team-cell:hover .team-cell__size,
.page-about .team-cell:hover .team-cell__duty {
  color: var(--green-deep);
}

@media (min-width: 640px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
}

/* ---------- 合作 ---------- */
.page-about .about-partners__grid {
  display: grid;
  gap: 28px;
}

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

.page-about .about-partners__figure img {
  display: block;
  width: 100%;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 22px 100%, 0 calc(100% - 22px));
  filter: saturate(0.85);
}

.page-about .about-partners__caption {
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gray);
}

.page-about .about-partners__body p {
  margin: 0 0 1.2em;
  line-height: 1.78;
  max-width: 62ch;
}

.page-about .about-partners__body .about-title {
  margin-bottom: 20px;
}

.page-about .about-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
  font-size: 15px;
  color: var(--green-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--lime);
  padding-bottom: 3px;
  transition: color 0.15s var(--ease), border-color 0.15s var(--ease);
}

.page-about .about-link::after {
  content: "\2192";
  font-size: 0.95em;
  line-height: 1;
}

.page-about .about-link:hover {
  color: var(--ink);
  border-bottom-color: var(--green-deep);
}

.page-about .about-link--light {
  color: var(--white);
  border-bottom-color: rgba(198, 255, 61, 0.55);
}

.page-about .about-link--light:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

@media (min-width: 900px) {
  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 0 48px;
    align-items: start;
  }
}

/* ---------- 版本年表 ---------- */
.page-about .about-timeline {
  position: relative;
  overflow: hidden;
  background: var(--shade);
  color: var(--white);
  padding: var(--about-space) 0;
}

.page-about .about-timeline__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
  filter: grayscale(0.4) saturate(0.6);
}

.page-about .about-timeline__veil {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(180deg, rgba(8, 32, 24, 0.86), rgba(8, 32, 24, 0.97) 70%);
}

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

.page-about .about-timeline__head {
  max-width: 60ch;
}

.page-about .about-timeline__intro {
  margin: 20px 0 0;
  line-height: 1.78;
  color: rgba(243, 246, 241, 0.78);
}

.page-about .timeline {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
}

.page-about .timeline__item {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  column-gap: 16px;
  padding-bottom: 30px;
}

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

.page-about .timeline__rail {
  position: relative;
  grid-column: 1;
  grid-row: 1 / span 2;
}

.page-about .timeline__rail::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 6px;
  bottom: -30px;
  width: 1px;
  background: rgba(198, 255, 61, 0.26);
  transform: translateX(-50%);
}

.page-about .timeline__item:last-child .timeline__rail::before {
  bottom: 8px;
}

.page-about .timeline__rail::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 4px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--lime);
  transform: translateX(-50%);
}

.page-about .timeline__item--current .timeline__rail::after {
  background: transparent;
  border: 1.5px solid var(--lime);
  box-shadow: 0 0 0 4px rgba(198, 255, 61, 0.14);
}

.page-about .timeline__anchor {
  grid-column: 2;
  grid-row: 1;
}

.page-about .timeline__ver {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  color: var(--lime);
}

.page-about .timeline__when {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: rgba(243, 246, 241, 0.52);
}

.page-about .timeline__body {
  grid-column: 2;
  grid-row: 2;
  margin-top: 8px;
}

.page-about .timeline__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  line-height: 1.35;
  color: var(--white);
}

.page-about .timeline__text {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(243, 246, 241, 0.72);
  max-width: 58ch;
}

@media (min-width: 900px) {
  .page-about .timeline__item {
    grid-template-columns: 132px 22px minmax(0, 1fr);
    column-gap: 22px;
    padding-bottom: 34px;
  }

  .page-about .timeline__anchor {
    grid-column: 1;
    grid-row: 1;
    text-align: right;
    padding-top: 0;
  }

  .page-about .timeline__rail {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .timeline__body {
    grid-column: 3;
    grid-row: 1;
    margin-top: 0;
  }

  .page-about .timeline__ver {
    font-size: 1rem;
  }
}

/* ---------- 更正机制 ---------- */
.page-about .fix-steps {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .fix-step {
  position: relative;
  padding: 18px 4px 4px;
  border-top: 2px solid var(--green-pitch);
}

.page-about .fix-step__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--flame);
}

.page-about .fix-step__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.14rem;
  letter-spacing: 0.02em;
  color: var(--green-deep);
}

.page-about .fix-step__text {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--gray);
}

@media (min-width: 760px) {
  .page-about .fix-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  background: var(--green-deep);
  color: var(--white);
  padding: var(--about-space) 0;
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  right: -8%;
  top: -30%;
  width: 52%;
  height: 320px;
  background: radial-gradient(closest-side, rgba(63, 216, 194, 0.16), transparent 70%);
  pointer-events: none;
}

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

.page-about .about-cta__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.75rem, 5vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 12px 0 0;
  color: var(--white);
  max-width: 20ch;
}

.page-about .about-cta__text {
  margin: 20px 0 0;
  max-width: 56ch;
  line-height: 1.78;
  font-size: 16px;
  color: rgba(243, 246, 241, 0.82);
}

.page-about .about-cta__actions {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 26px;
}

@media (min-width: 900px) {
  .page-about .about-cta__actions {
    gap: 18px 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-cell,
  .page-about .about-step,
  .page-about .about-link,
  .page-about .breadcrumbs a {
    transition: none;
  }
}
<<<END>>>