.page-about {
  --about-pad: clamp(20px, 3vw, 36px);
  --about-gap: clamp(40px, 6vw, 76px);
  background:
    radial-gradient(120% 80% at 82% 0%, rgba(66, 245, 209, .07), transparent 62%),
    radial-gradient(90% 60% at 0% 42%, rgba(16, 56, 46, .55), transparent 70%),
    var(--ink-base);
  color: var(--paper);
  padding-top: var(--about-pad);
  padding-bottom: clamp(52px, 8vw, 96px);
}

.page-about [id] {
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

/* ---------- 外壳：左侧章节目录 + 右侧连续画布 ---------- */
.page-about .about-shell {
  margin-top: clamp(18px, 3vw, 30px);
}

.page-about .about-toc {
  margin: 0 0 clamp(26px, 4vw, 44px);
}

.page-about .about-toc__head {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-toc__list {
  display: flex;
  flex-wrap: nowrap;
  gap: 6px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 9px 12px;
  border: 1px solid var(--line);
  color: var(--mist);
  font-size: 12px;
  letter-spacing: .06em;
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .about-toc__link .num {
  color: var(--gold);
  font-size: 11px;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--paper);
  border-color: var(--line-strong);
  background: var(--cyan-12);
}

.page-about .about-canvas {
  min-width: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding-bottom: clamp(32px, 5vw, 56px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 16px;
  color: var(--mist);
}

.page-about .about-h1 {
  margin: 0;
  font-weight: 200;
  font-size: clamp(32px, 6.2vw, 76px);
  line-height: 1.04;
  letter-spacing: -.012em;
  color: var(--paper);
}

.page-about .about-h1 em {
  font-style: normal;
  font-weight: 800;
  color: var(--cyan);
}

.page-about .about-deck {
  max-width: 54ch;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
}

.page-about .about-hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__stat {
  padding: 15px 12px 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(21px, 2.6vw, 29px);
  font-weight: 300;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .about-hero__label {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(22px, 3vw, 30px);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-deep);
  overflow: hidden;
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .35;
  background-image:
    linear-gradient(to right, var(--cyan-12) 1px, transparent 1px),
    linear-gradient(to bottom, var(--cyan-12) 1px, transparent 1px);
  background-size: 40px 40px;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

/* ---------- 章节通用 ---------- */
.page-about .chapter {
  padding: clamp(38px, 6vw, 72px) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .chapter:last-of-type {
  border-bottom: 0;
}

.page-about .chapter__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 clamp(18px, 3vw, 28px);
}

.page-about .chapter__idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-about .chapter__title {
  margin: 0;
  font-weight: 200;
  font-size: clamp(23px, 3.5vw, 40px);
  line-height: 1.2;
  letter-spacing: -.006em;
  color: var(--paper);
}

.page-about .chapter p {
  max-width: 64ch;
  margin: 0 0 16px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
}

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

.page-about .chapter__note {
  margin-top: clamp(18px, 2.6vw, 24px);
  padding-left: 14px;
  border-left: 2px solid var(--gold-deep);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .col2 {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
}

/* ---------- 01 原则清单 ---------- */
.page-about .principles {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.page-about .principles li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  transition: background .18s var(--ease);
}

.page-about .principles__n {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .principles h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-about .principles p {
  margin: 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 02 流程条 ---------- */
.page-about .flow {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .flow li {
  padding: 20px 18px 22px;
  background: var(--ink-deep);
}

.page-about .flow__step {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-about .flow h3 {
  margin: 10px 0 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .flow p {
  margin: 0;
  max-width: none;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 03 时间线 ---------- */
.page-about .tl {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.page-about .tl__node {
  padding: 20px 0 22px;
  border-bottom: 1px solid var(--line);
  transition: background .18s var(--ease);
}

.page-about .tl__year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 300;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .tl__title {
  margin: 10px 0 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .03em;
  color: var(--paper);
}

.page-about .tl__text {
  margin: 0;
  max-width: none;
  font-size: 13px;
  line-height: 1.76;
  color: var(--mist);
}

.page-about .tl__node--now .tl__year {
  color: var(--gold);
}

.page-about .tl__node--now {
  background: linear-gradient(180deg, rgba(231, 179, 74, .07), transparent 80%);
}

/* ---------- 图片件 ---------- */
.page-about .about-figure {
  margin: clamp(24px, 3.6vw, 36px) 0 0;
  border: 1px solid var(--line);
  background: var(--ink-deep);
}

.page-about .about-figure--flush {
  margin-top: 0;
}

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

.page-about .about-figure__cap {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-about .about-figure__cap .num {
  font-family: var(--font-mono);
  color: var(--gold);
}

/* ---------- 04 覆盖范围 ---------- */
.page-about .tagcloud {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
}

.page-about .facts {
  margin: 0;
  border-top: 1px solid var(--line-strong);
}

.page-about .facts > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .facts dt {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about .facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 300;
  letter-spacing: -.01em;
  color: var(--cyan);
  white-space: nowrap;
}

/* ---------- 05 合作与认可 ---------- */
.page-about .awards {
  list-style: none;
  margin: clamp(24px, 3.2vw, 34px) 0 0;
  padding: 0;
}

.page-about .awards__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: 20px 20px 22px;
  border: 1px solid var(--gold-deep);
  background: linear-gradient(125deg, rgba(231, 179, 74, .12), transparent 62%);
}

.page-about .awards__mark {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .awards h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--gold);
}

.page-about .awards p {
  margin: 0;
  max-width: 56ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 06 团队 ---------- */
.page-about .team-layout {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .team-table {
  width: 100%;
  margin-top: clamp(22px, 3vw, 32px);
  border-collapse: collapse;
  text-align: left;
}

.page-about .team-table thead th {
  padding: 0 0 10px;
  border-bottom: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .14em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-about .team-table tbody th {
  padding: 14px 12px 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--paper);
  white-space: nowrap;
}

.page-about .team-table tbody td {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  vertical-align: top;
}

.page-about .team-table td.num {
  width: 56px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 300;
  color: var(--cyan);
}

.page-about .team-table__desc {
  display: none;
}

.page-about .team-table tbody tr:hover th,
.page-about .team-table tbody tr:hover td {
  background: var(--cyan-12);
}

.page-about .team-table .team-table__total th,
.page-about .team-table .team-table__total td {
  border-bottom: 0;
  padding-top: 16px;
  color: var(--paper);
}

.page-about .team-table .team-table__total td.num {
  color: var(--gold);
  font-size: 17px;
}

/* ---------- 收束面板 ---------- */
.page-about .about-close {
  margin-top: clamp(38px, 6vw, 72px);
  padding: clamp(22px, 4vw, 42px);
  background:
    linear-gradient(140deg, rgba(66, 245, 209, .10), transparent 58%),
    var(--ink-deep);
}

.page-about .about-close__title {
  margin: 12px 0 0;
  font-weight: 200;
  font-size: clamp(21px, 3vw, 34px);
  line-height: 1.24;
  color: var(--paper);
}

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 28px);
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-about .about-hero__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-left: 1px solid var(--line);
  }

  .page-about .about-hero__stat {
    padding: 15px 14px;
    border-left: 1px solid var(--line);
    border-bottom: 0;
  }

  .page-about .awards__item {
    grid-template-columns: 92px minmax(0, 1fr);
    align-items: start;
    gap: 18px;
  }
}

@media (min-width: 768px) {
  .page-about .team-table__desc {
    display: table-cell;
    padding-left: 16px;
  }

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

@media (min-width: 820px) {
  .page-about .col2 {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: end;
  }

  .page-about .tl {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .tl__node {
    padding: 20px 16px 24px 0;
    border-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .tl__node:first-child {
    border-left: 0;
    padding-left: 0;
  }

  .page-about .tl__node + .tl__node {
    padding-left: 16px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-shell {
    display: grid;
    grid-template-columns: minmax(176px, 208px) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 84px);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: calc(var(--bar-h) + 26px);
    margin: 0;
  }

  .page-about .about-toc__list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-toc__link {
    display: grid;
    grid-template-columns: 30px minmax(0, 1fr);
    align-items: baseline;
    gap: 10px;
    width: 100%;
    padding: 11px 0;
    border: 0;
    border-top: 1px solid var(--line);
    white-space: normal;
  }

  .page-about .about-toc__list li:last-child .about-toc__link {
    border-bottom: 1px solid var(--line);
  }

  .page-about .about-toc__link:hover,
  .page-about .about-toc__link:focus-visible {
    background: transparent;
    color: var(--cyan);
    border-color: var(--line-strong);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc__link,
  .page-about .principles li,
  .page-about .tl__node,
  .page-about .team-table tbody tr {
    transition: none;
  }
}
<<<END>>>