.page-about {
  --about-shell: min(var(--container), 100%);
  --about-rule: 1px solid rgba(70, 98, 122, .2);
  --about-rule-dark: 1px solid rgba(255, 251, 245, .14);
  background: var(--paper);
  color: var(--ink);
  display: block;
  overflow-x: clip;
}

.page-about .about-shell {
  box-sizing: border-box;
  width: var(--about-shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-block: 1.1rem .4rem;
}
.page-about .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: .84rem;
  letter-spacing: .02em;
  color: var(--steel);
}
.page-about .crumbs li + li::before {
  content: "›";
  margin-right: .55rem;
  color: var(--steel-soft);
}
.page-about .crumbs a {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--apricot-deep);
  border-bottom-color: var(--apricot);
}
.page-about .crumbs [aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background:
    radial-gradient(120% 90% at 88% 12%, rgba(246, 166, 35, .22), transparent 58%),
    linear-gradient(160deg, var(--night) 0%, var(--night-deep) 100%);
  color: var(--paper);
  padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(3rem, 8vw, 5.5rem);
  overflow: hidden;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 251, 245, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 251, 245, .07) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(2rem, 5vw, 3.25rem);
  grid-template-columns: 1fr;
  align-items: center;
}
.page-about .about-hero__title {
  margin: .75rem 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 7.4vw, 4rem);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--paper);
}
.page-about .about-hero__title::after {
  content: "";
  display: block;
  width: clamp(4rem, 22vw, 9rem);
  height: 4px;
  margin-top: 1.15rem;
  border-radius: var(--pill);
  background: linear-gradient(90deg, var(--apricot), var(--apricot-deep));
}
.page-about .about-hero__lead {
  margin: 1.35rem 0 0;
  max-width: 34em;
  font-size: clamp(1rem, 1.15vw, 1.12rem);
  line-height: 1.85;
  color: rgba(255, 251, 245, .84);
}
.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .9rem;
  margin: 2rem 0 0;
  padding: 1.25rem 0 0;
  list-style: none;
  border-top: var(--about-rule-dark);
}
.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  min-width: 0;
}
.page-about .about-stat__num {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(1.5rem, 4.4vw, 2.05rem);
  line-height: 1;
  color: var(--lamp);
  font-variant-numeric: tabular-nums;
}
.page-about .about-stat__unit {
  font-size: .55em;
  margin-left: .12em;
  color: var(--apricot);
}
.page-about .about-stat__label {
  font-size: .78rem;
  line-height: 1.5;
  color: rgba(255, 251, 245, .62);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 2rem;
}
.page-about .about-hero__figure {
  border: var(--about-rule-dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(10, 31, 27, .6);
}
.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(.92) contrast(1.06) brightness(.86);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-band {
  position: relative;
  padding-block: clamp(2.75rem, 7vw, 5rem);
}
.page-about .about-band--honey {
  background: var(--honey);
  color: var(--ink);
}
.page-about .about-band--paper {
  background: var(--paper);
  color: var(--ink);
}
.page-about .about-band--night {
  background:
    linear-gradient(180deg, var(--night) 0%, var(--night-deep) 100%);
  color: var(--paper);
}
.page-about .about-band--honey::before,
.page-about .about-band--paper::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(70, 98, 122, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(70, 98, 122, .07) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}
.page-about .about-section__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}
.page-about .about-section__index {
  display: none;
}
.page-about .about-section__head {
  max-width: 44rem;
}
.page-about .about-section__head h2 {
  margin: .6rem 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.55rem, 4.4vw, 2.5rem);
  line-height: 1.16;
  letter-spacing: -.015em;
}
.page-about .about-band--night .about-section__head h2 {
  color: var(--paper);
}
.page-about .about-section__intro {
  margin: 1rem 0 0;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--steel);
}
.page-about .about-band--night .about-section__intro {
  color: rgba(255, 251, 245, .72);
}
.page-about .about-section__body p {
  margin: 0 0 1.15rem;
  font-size: 1.02rem;
  line-height: 1.85;
}
.page-about .about-section__body p:last-child {
  margin-bottom: 0;
}

/* ---------- 处理环节标签页 ---------- */
.page-about .about-pipeline {
  margin-top: .5rem;
}
.page-about .about-pipeline__panel {
  margin-top: 1.5rem;
  padding: clamp(1.25rem, 3.5vw, 2rem);
  border-radius: var(--radius-lg);
  background: var(--honey);
  border-left: 5px solid var(--apricot);
}
.page-about .about-band--honey .about-pipeline__panel {
  background: var(--paper);
}
.page-about .about-pipeline__panel:focus-visible {
  outline: 3px solid var(--apricot);
  outline-offset: 3px;
}
.page-about .about-pipeline__title {
  margin: 0 0 .8rem;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.6vw, 1.35rem);
  font-weight: 800;
  line-height: 1.35;
}
.page-about .about-pipeline__panel > p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink);
}
.page-about .about-points {
  margin: 1.15rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .6rem;
}
.page-about .about-points li {
  position: relative;
  padding-left: 1.5rem;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--steel);
}
.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--apricot-mid);
  transform: rotate(45deg);
}
.page-about .about-pipeline__figure {
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  position: relative;
}
.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: .9rem;
  bottom: .9rem;
  width: 2px;
  border-radius: var(--pill);
  background: linear-gradient(180deg, var(--apricot) 0%, var(--apricot-deep) 48%, var(--steel-soft) 100%);
}
.page-about .timeline__item {
  position: relative;
  padding: 1.1rem 0 1.1rem 2.9rem;
  border-bottom: var(--about-rule);
  transition: transform .24s ease;
}
.page-about .timeline__item:last-child {
  border-bottom: 0;
}
.page-about .timeline__item:hover {
  transform: translateX(4px);
}
.page-about .timeline__dot {
  position: absolute;
  left: 1px;
  top: 1.45rem;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--apricot);
  box-shadow: 0 0 0 4px rgba(246, 166, 35, .18);
  transition: border-color .24s ease, box-shadow .24s ease, transform .24s ease;
}
.page-about .timeline__item:hover .timeline__dot,
.page-about .timeline__item:focus-within .timeline__dot {
  border-color: var(--apricot-deep);
  box-shadow: 0 0 0 6px rgba(198, 67, 47, .16);
  transform: scale(1.08);
}
.page-about .timeline__item--current .timeline__dot {
  background: var(--night);
  border-color: var(--mint);
  box-shadow: 0 0 0 5px rgba(53, 239, 192, .2);
}
.page-about .timeline__ver {
  display: inline-block;
  margin: 0 0 .4rem;
  padding: .18rem .6rem;
  border-radius: var(--pill);
  background: var(--apricot);
  color: var(--ink);
  font-family: var(--font-num);
  font-weight: 700;
  font-size: .76rem;
  letter-spacing: .08em;
}
.page-about .timeline__item--current .timeline__ver {
  background: var(--mint);
}
.page-about .timeline__title {
  margin: 0 0 .45rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.02rem, 2.7vw, 1.22rem);
  line-height: 1.4;
}
.page-about .timeline__text {
  margin: 0;
  font-size: .98rem;
  line-height: 1.8;
  color: var(--steel);
  max-width: 40rem;
}
.page-about .about-timeline__figure {
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
}

/* ---------- 图片容器兜底 ---------- */
.page-about .img-frame {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  background: var(--night);
}
.page-about .img-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.94) contrast(1.05) brightness(.9);
}
.page-about .img-frame--wide img {
  aspect-ratio: 7 / 5;
}
.page-about .img-frame__stamp {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  padding: .35rem .85rem;
  border-radius: var(--pill);
  background: rgba(14, 42, 37, .78);
  color: var(--lamp);
  font-family: var(--font-num);
  font-size: .74rem;
  letter-spacing: .06em;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 5vw, 3rem);
  align-items: start;
}
.page-about .about-team__ring {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
.page-about .shift-ring {
  width: min(260px, 74vw);
  height: auto;
}
.page-about .shift-ring__center {
  font-family: var(--font-num);
  font-size: 34px;
  font-weight: 700;
  fill: var(--paper);
}
.page-about .shift-ring__sub {
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: .18em;
  fill: rgba(255, 251, 245, .6);
}
.page-about .shift-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .5rem 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: .82rem;
  color: rgba(255, 251, 245, .74);
}
.page-about .shift-legend li {
  display: inline-flex;
  align-items: center;
  gap: .42rem;
}
.page-about .shift-legend__swatch {
  width: 13px;
  height: 13px;
  border-radius: 4px;
  flex: none;
}
.page-about .shift-legend__swatch--mint { background: var(--mint); }
.page-about .shift-legend__swatch--apricot { background: var(--apricot); }
.page-about .shift-legend__swatch--deep { background: var(--apricot-deep); }

.page-about .about-team__list {
  display: grid;
  gap: 1rem;
}
.page-about .team-role {
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius-md);
  background: rgba(255, 251, 245, .05);
  border: var(--about-rule-dark);
}
.page-about .team-role__tag {
  display: inline-block;
  margin: 0 0 .55rem;
  padding: .16rem .6rem;
  border-radius: var(--pill);
  background: var(--mint);
  color: var(--night-deep);
  font-family: var(--font-num);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .06em;
}
.page-about .team-role__title {
  margin: 0 0 .5rem;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--paper);
}
.page-about .team-role p:last-child {
  margin: 0;
  font-size: .96rem;
  line-height: 1.8;
  color: rgba(255, 251, 245, .76);
}

/* ---------- 数据来源 ---------- */
.page-about .about-sources {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}
.page-about .source-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: var(--about-rule);
}
.page-about .source-list__item {
  position: relative;
  padding: 1.2rem 0 1.2rem 3.2rem;
  border-bottom: var(--about-rule);
}
.page-about .source-list__idx {
  position: absolute;
  left: 0;
  top: 1.32rem;
  font-family: var(--font-num);
  font-size: .82rem;
  font-weight: 700;
  color: var(--apricot-deep);
  letter-spacing: .06em;
}
.page-about .source-list__title {
  margin: 0 0 .4rem;
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 800;
}
.page-about .source-list__item p {
  margin: 0;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--steel);
}
.page-about .about-sources__aside {
  display: grid;
  gap: .9rem;
  align-content: start;
  padding: clamp(1.2rem, 3.5vw, 1.75rem);
  border-radius: var(--radius-lg);
  background: var(--honey);
  border-left: 5px solid var(--apricot-mid);
}
.page-about .about-band--paper .about-sources__aside {
  background: var(--honey);
}
.page-about .about-sources__note {
  margin: 0;
  font-size: .95rem;
  line-height: 1.82;
  color: var(--ink);
}
.page-about .about-inline-link {
  color: var(--apricot-deep);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 2px solid var(--apricot);
  transition: color .2s ease, border-color .2s ease;
}
.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--night);
  border-bottom-color: var(--night);
}

/* ---------- 三项坚持 ---------- */
.page-about .about-section--closing .commit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: .5rem;
}
.page-about .commit {
  position: relative;
  padding: 1.4rem 1.35rem 1.5rem;
  border-radius: var(--radius-md);
  background: rgba(255, 251, 245, .05);
  border-top: 4px solid var(--apricot);
  overflow: hidden;
}
.page-about .commit:nth-child(2) { border-top-color: var(--mint); }
.page-about .commit:nth-child(3) { border-top-color: var(--apricot-deep); }
.page-about .commit__no {
  margin: 0 0 .85rem;
  font-family: var(--font-num);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  color: rgba(255, 251, 245, .28);
}
.page-about .commit__title {
  margin: 0 0 .55rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--paper);
}
.page-about .commit__text {
  margin: 0;
  font-size: .96rem;
  line-height: 1.82;
  color: rgba(255, 251, 245, .76);
}

.page-about .about-closing__links {
  display: grid;
  grid-template-columns: 1fr;
  gap: .75rem;
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
}
.page-about .about-link-card {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  padding: 1.1rem 1.25rem;
  border-radius: var(--radius-md);
  border: var(--about-rule-dark);
  text-decoration: none;
  transition: background .22s ease, transform .22s ease, border-color .22s ease;
}
.page-about .about-link-card:hover,
.page-about .about-link-card:focus-visible {
  background: rgba(246, 166, 35, .14);
  border-color: var(--apricot);
  transform: translateY(-2px);
}
.page-about .about-link-card__label {
  font-family: var(--font-num);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--lamp);
}
.page-about .about-link-card__text {
  font-size: .95rem;
  line-height: 1.7;
  color: rgba(255, 251, 245, .82);
}

/* ---------- 动效 ---------- */
.page-about [data-reveal] {
  opacity: 1;
}
.page-about [data-js="ready"] [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .24s ease, transform .24s ease;
}
.page-about [data-js="ready"] [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal],
  .page-about [data-js="ready"] [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .page-about .timeline__item,
  .page-about .about-link-card {
    transition: none;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__inner {
    grid-template-columns: 1fr;
  }
  .page-about .about-team {
    grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
    align-items: center;
  }
  .page-about .about-team__ring {
    position: sticky;
    top: calc(var(--topbar-h) + 1.5rem);
  }
  .page-about .about-sources {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }
  .page-about .about-closing__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .commit-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    gap: clamp(2.5rem, 5vw, 4.5rem);
  }
  .page-about .about-section {
    padding-block: clamp(3.5rem, 6vw, 6rem) clamp(3.5rem, 6vw, 5.5rem);
  }
  .page-about .about-section__inner {
    grid-template-columns: 3.25rem minmax(0, 1fr);
    column-gap: clamp(1.5rem, 3vw, 3rem);
  }
  .page-about .about-section__index {
    display: block;
    grid-column: 1;
    grid-row: 1 / -1;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    justify-self: start;
    font-family: var(--font-num);
    font-size: .8rem;
    font-weight: 700;
    letter-spacing: .4em;
    color: var(--steel-soft);
    padding-top: .35rem;
    user-select: none;
  }
  .page-about .about-band--night .about-section__index {
    color: rgba(255, 209, 102, .62);
  }
  .page-about .about-section__head,
  .page-about .about-section__body,
  .page-about .about-pipeline,
  .page-about .timeline,
  .page-about .about-team,
  .page-about .about-sources,
  .page-about .commit-grid,
  .page-about .about-closing__links,
  .page-about .img-frame {
    grid-column: 2;
  }
  .page-about .about-pipeline__figure,
  .page-about .about-timeline__figure {
    margin-top: clamp(2rem, 4vw, 3rem);
  }
  .page-about .img-frame--wide img {
    aspect-ratio: 16 / 9;
  }
  .page-about .timeline__item {
    padding-right: 2rem;
  }
}

/* ---------- 宽屏微调 ---------- */
@media (min-width: 1280px) {
  .page-about .about-hero__title {
    font-size: clamp(2.8rem, 3.6vw, 4.1rem);
  }
}
<<<END>>>