.page-about {
  --about-accent: var(--f6-orange);
  color: var(--f6-white);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .about-crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--f6-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--f6-mist);
  padding-top: clamp(16px, 3vw, 28px);
}
.page-about .about-crumbs a {
  color: var(--f6-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  color: var(--f6-blue);
  border-bottom-color: var(--f6-blue);
}
.page-about .about-crumbs__sep {
  color: var(--f6-line);
}
.page-about .about-crumbs [aria-current="page"] {
  color: var(--f6-lime);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(28px, 5vw, 56px) clamp(24px, 4vw, 48px);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -30% -10% auto -10%;
  height: clamp(320px, 55vw, 520px);
  background:
    radial-gradient(42% 58% at 18% 32%, rgba(255, 122, 26, .20), transparent 72%),
    radial-gradient(38% 52% at 66% 8%, rgba(139, 92, 246, .22), transparent 72%),
    radial-gradient(34% 54% at 92% 62%, rgba(47, 211, 255, .16), transparent 72%);
  pointer-events: none;
  z-index: 0;
}
.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: end;
}
.page-about .about-title {
  font-family: var(--f6-display);
  font-size: clamp(2.1rem, 6.4vw, 3.9rem);
  line-height: 1.08;
  letter-spacing: -.01em;
  margin: 14px 0 18px;
  text-wrap: balance;
  text-shadow: 0 0 32px rgba(255, 122, 26, .22);
}
.page-about .about-lead {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--f6-white);
  max-width: 62ch;
  margin: 0;
}
.page-about .about-lead--sub {
  margin-top: 14px;
  color: var(--f6-mist);
}
.page-about .about-hero__media {
  margin: 0;
  border-radius: var(--f6-r-lg);
  overflow: hidden;
  border: 1px solid var(--f6-line);
  background: var(--f6-panel);
  box-shadow: 0 24px 60px -30px rgba(0, 0, 0, .9);
}
.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-hero__cap {
  display: block;
  font-size: 11px;
  line-height: 1.6;
  color: var(--f6-mist);
  padding: 12px 18px;
  border-top: 1px solid var(--f6-line);
}

/* ---------- 数字条 ---------- */
.page-about .about-stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 5vw, 52px) 0 0;
  background: var(--f6-line);
  border: 1px solid var(--f6-line);
  border-radius: var(--f6-r-md);
  overflow: hidden;
}
.page-about .about-stat {
  background: var(--f6-ink);
  padding: 18px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-about .about-stat__label {
  font-family: var(--f6-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--f6-mist);
  order: 2;
}
.page-about .about-stat__num {
  font-family: var(--f6-display);
  font-size: clamp(1.9rem, 6vw, 2.7rem);
  line-height: 1;
  margin: 0;
  color: var(--f6-orange);
  order: 1;
}
.page-about .about-stat__num small {
  font-family: var(--f6-body);
  font-size: 12px;
  font-weight: 400;
  margin-left: 3px;
  color: var(--f6-mist);
}
.page-about .about-stat__note {
  order: 3;
  margin: 6px 0 0;
  font-size: 12px;
  line-height: 1.65;
  color: var(--f6-mist);
}
.page-about .about-stat:nth-child(2) .about-stat__num { color: var(--f6-lime); }
.page-about .about-stat:nth-child(3) .about-stat__num { color: var(--f6-blue); }
.page-about .about-stat:nth-child(4) .about-stat__num { color: var(--f6-cherry); }

/* ---------- 通用区块 ---------- */
.page-about .about-h2 {
  font-family: var(--f6-display);
  font-size: clamp(1.55rem, 4vw, 2.35rem);
  line-height: 1.2;
  margin: 10px 0 0;
  text-wrap: balance;
}
.page-about .about-split {
  display: grid;
  gap: clamp(20px, 4vw, 46px);
}
.page-about .about-split__main p,
.page-about .about-method__body p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--f6-white);
  max-width: 66ch;
}
.page-about .about-split__main p:last-child { margin-bottom: 0; }

/* ---------- 起点 ---------- */
.page-about .about-origin {
  border-top: 1px solid var(--f6-line);
  padding-top: clamp(28px, 5vw, 52px);
}

/* ---------- 整理方法 ---------- */
.page-about .about-method__media {
  margin: 0;
  border-radius: var(--f6-r-lg);
  overflow: hidden;
  border: 1px solid var(--f6-line);
  background: var(--f6-panel);
  align-self: start;
}
.page-about .about-method__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-steps {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 4px;
}
.page-about .about-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 4px;
  padding: 16px 0;
  border-top: 1px solid var(--f6-line);
}
.page-about .about-step:last-child {
  border-bottom: 1px solid var(--f6-line);
}
.page-about .about-step__idx {
  grid-row: span 2;
  font-size: 13px;
  color: var(--f6-orange);
  padding-top: 3px;
}
.page-about .about-step__title {
  font-family: var(--f6-body);
  font-size: 16px;
  font-weight: 700;
  margin: 0;
}
.page-about .about-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--f6-mist);
  max-width: 60ch;
}
.page-about .about-method__foot {
  margin-top: 20px !important;
  padding: 16px 20px;
  border-radius: var(--f6-r-md);
  border: 1px solid rgba(184, 255, 61, .28);
  background: linear-gradient(120deg, rgba(184, 255, 61, .10), rgba(47, 211, 255, .06));
  color: var(--f6-white) !important;
  font-size: 14.5px !important;
}

/* ---------- 团队 ---------- */
.page-about .about-team__intro {
  margin: 14px 0 24px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--f6-mist);
  max-width: 58ch;
}
.page-about .about-team__list {
  display: grid;
  gap: 12px;
}
.page-about .about-team__item {
  --accent: var(--f6-orange);
  border: 1px solid var(--f6-line);
  border-radius: var(--f6-r-md);
  background: var(--f6-panel);
  transition: border-color .2s var(--f6-ease), background .2s var(--f6-ease);
}
.page-about .about-team__item:nth-child(2) { --accent: var(--f6-lime); }
.page-about .about-team__item:nth-child(3) { --accent: var(--f6-blue); }
.page-about .about-team__item[open] {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--f6-line));
  background: linear-gradient(160deg, rgba(18, 26, 51, .95), rgba(10, 13, 28, .95));
}
.page-about .about-team__tag {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  cursor: pointer;
  padding: 16px 18px;
  border-radius: var(--f6-r-md);
  list-style: none;
}
.page-about .about-team__tag::-webkit-details-marker { display: none; }
.page-about .about-team__tag:focus-visible {
  outline: 2px solid var(--f6-blue);
  outline-offset: 2px;
}
.page-about .about-team__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  flex: none;
}
.page-about .about-team__name {
  font-family: var(--f6-display);
  font-size: clamp(1.05rem, 3.4vw, 1.3rem);
  color: var(--f6-white);
}
.page-about .about-team__hint {
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--f6-mist);
}
.page-about .about-team__body {
  padding: 0 18px 18px;
}
.page-about .about-team__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--f6-mist);
  max-width: 62ch;
}

/* ---------- 阶段轨道 ---------- */
.page-about .about-phases__intro {
  margin: 14px 0 26px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--f6-mist);
  max-width: 56ch;
}
.page-about .about-phases {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .about-phases::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 22px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--f6-orange), var(--f6-lime) 45%, var(--f6-grape) 75%, var(--f6-blue));
  opacity: .55;
}
.page-about .about-node {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  column-gap: 18px;
  padding-bottom: 26px;
}
.page-about .about-node:last-child { padding-bottom: 0; }
.page-about .about-node__marker {
  width: 18px;
  height: 18px;
  margin-top: 4px;
  border-radius: 50%;
  border: 2px solid var(--f6-orange);
  background: var(--f6-ink);
  box-shadow: 0 0 0 4px rgba(255, 122, 26, .10);
  position: relative;
  z-index: 1;
}
.page-about .about-node:nth-child(2) .about-node__marker { border-color: var(--f6-lime); box-shadow: 0 0 0 4px rgba(184, 255, 61, .10); }
.page-about .about-node:nth-child(3) .about-node__marker { border-color: var(--f6-blue); box-shadow: 0 0 0 4px rgba(47, 211, 255, .10); }
.page-about .about-node:nth-child(4) .about-node__marker { border-color: var(--f6-grape); box-shadow: 0 0 0 4px rgba(139, 92, 246, .12); }
.page-about .about-node:nth-child(5) .about-node__marker { border-color: var(--f6-cherry); box-shadow: 0 0 0 4px rgba(255, 61, 95, .10); }
.page-about .about-node__idx {
  margin: 0 0 6px;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--f6-mist);
}
.page-about .about-node__title {
  font-family: var(--f6-display);
  font-size: clamp(1.1rem, 3.2vw, 1.35rem);
  margin: 0 0 8px;
  line-height: 1.3;
}
.page-about .about-node__sum {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--f6-mist);
  max-width: 60ch;
}
.page-about .about-node__more {
  margin-top: 12px;
  border-left: 2px solid var(--f6-line);
  padding-left: 14px;
}
.page-about .about-node__more summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--f6-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--f6-blue);
}
.page-about .about-node__more summary::-webkit-details-marker { display: none; }
.page-about .about-node__more summary::before {
  content: "＋ ";
  color: var(--f6-orange);
}
.page-about .about-node__more[open] summary::before {
  content: "－ ";
}
.page-about .about-node__more summary:focus-visible {
  outline: 2px solid var(--f6-blue);
  outline-offset: 3px;
}
.page-about .about-node__more p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--f6-mist);
  max-width: 58ch;
}

/* ---------- 合作 ---------- */
.page-about .about-net__lead {
  margin: 14px 0 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--f6-mist);
  max-width: 52ch;
}
.page-about .about-net__list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about .about-net__node {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--f6-white);
  padding: 7px 14px;
  border-radius: var(--f6-pill);
  border: 1px dashed rgba(168, 177, 207, .45);
  background: rgba(18, 26, 51, .6);
}
.page-about .about-net__node .fs-mono {
  font-size: 11px;
  color: var(--f6-lime);
}
.page-about .about-net__note {
  margin: 0;
  padding: 14px 18px;
  border-radius: var(--f6-r-md);
  background: linear-gradient(120deg, rgba(139, 92, 246, .16), rgba(47, 211, 255, .08));
  border: 1px solid rgba(139, 92, 246, .3);
  font-size: 14px;
  line-height: 1.8;
  color: var(--f6-white);
  max-width: 54ch;
}
.page-about .about-net__media {
  margin: 0;
  align-self: start;
  border-radius: var(--f6-r-lg);
  overflow: hidden;
  border: 1px solid var(--f6-line);
  background: var(--f6-panel);
}
.page-about .about-net__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-net__cap {
  display: block;
  font-size: 11px;
  color: var(--f6-mist);
  padding: 12px 18px;
  border-top: 1px solid var(--f6-line);
}

/* ---------- 下一页入口 ---------- */
.page-about .about-next__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--f6-line);
}
.page-about .about-next__row {
  border-bottom: 1px solid var(--f6-line);
}
.page-about .about-next__link {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 22px;
  align-items: center;
  gap: 14px;
  padding: 18px 4px;
  text-decoration: none;
  color: var(--f6-white);
  transition: padding-left .2s var(--f6-ease), background .2s var(--f6-ease);
}
.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  padding-left: 12px;
  background: linear-gradient(90deg, rgba(47, 211, 255, .10), transparent 70%);
  outline: none;
}
.page-about .about-next__link:focus-visible {
  outline: 2px solid var(--f6-blue);
  outline-offset: 2px;
}
.page-about .about-next__num {
  font-size: 13px;
  color: var(--f6-orange);
}
.page-about .about-next__text {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.page-about .about-next__text strong {
  font-family: var(--f6-display);
  font-weight: 400;
  font-size: clamp(1rem, 3vw, 1.2rem);
  line-height: 1.35;
}
.page-about .about-next__text em {
  font-style: normal;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--f6-mist);
}
.page-about .about-next__arrow {
  color: var(--f6-lime);
  font-size: 18px;
  transition: transform .2s var(--f6-ease);
}
.page-about .about-next__link:hover .about-next__arrow {
  transform: translateX(4px);
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-stat {
    padding: 22px 20px 24px;
  }
  .page-about .about-team__item:nth-child(2) { margin-left: clamp(0px, 4vw, 40px); }
  .page-about .about-team__item:nth-child(3) { margin-left: clamp(0px, 8vw, 80px); }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }
  .page-about .about-split {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
  }
  .page-about .about-split--flip {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }
  .page-about .about-split__side {
    position: sticky;
    top: 32px;
  }
  .page-about .about-phases {
    padding-left: 8px;
  }
  .page-about .about-node {
    grid-template-columns: 18px minmax(0, 1fr);
    column-gap: 28px;
    padding-bottom: 34px;
  }
  .page-about .about-next__link {
    grid-template-columns: 48px minmax(0, 1fr) 28px;
    padding: 24px 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__item,
  .page-about .about-next__link,
  .page-about .about-next__arrow {
    transition: none;
  }
  .page-about .about-next__link:hover .about-next__arrow {
    transform: none;
  }
}
<<<END>>>