.page-about {
  --ab-note-w: 104px;
  --ab-chapter-y: clamp(64px, 8vw, 128px);
  --ab-ink-soft: #33414E;
  --ab-line: rgba(16, 22, 28, .12);
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(44px, 7vw, 104px) 0 clamp(64px, 9vw, 132px);
  background:
    radial-gradient(120% 96% at 88% 0%, rgba(31, 122, 99, .30), transparent 62%),
    radial-gradient(90% 80% at 6% 108%, rgba(200, 162, 74, .22), transparent 66%),
    var(--sea);
  color: var(--on-deep);
  overflow: hidden;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 18px;
}

.page-about .about-hero__annote {
  color: var(--gold-light);
  margin: 0;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 74px);
  line-height: 1.1;
  letter-spacing: -0.012em;
  margin: 20px 0 0;
  color: var(--paper);
  max-width: 18ch;
}

.page-about .about-hero__lede {
  font-family: var(--font-body);
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.95;
  color: var(--on-deep);
  max-width: 60ch;
  margin: 26px 0 0;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 30px 0 0;
}

.page-about .about-hero__meta .tag {
  background: rgba(230, 201, 122, .12);
  color: var(--gold-light);
  border: 1px solid rgba(230, 201, 122, .34);
}

.page-about .about-hero__figure {
  max-width: var(--wrap);
  margin: -32px auto 0;
  padding: 0 var(--gutter);
  position: relative;
  z-index: 2;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 20 / 9;
  object-fit: cover;
  border-radius: var(--r-lg);
  background: var(--deck);
}

.page-about .about-hero__caption {
  margin: 14px 2px 0;
  font-size: 13px;
  line-height: 1.75;
  letter-spacing: .04em;
  color: var(--mist);
}

/* ---------- 章节骨架 ---------- */

.page-about .chapter {
  padding-top: var(--ab-chapter-y);
}

.page-about .chapter__grid {
  display: grid;
  gap: 18px;
}

.page-about .chapter__note {
  display: flex;
  align-items: center;
  gap: 16px;
}

.page-about .chapter__index {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 5vw, 68px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: transparent;
  -webkit-text-stroke: 1.4px var(--gold);
  text-decoration: none;
  transition: color var(--fast) var(--ease), -webkit-text-stroke-color var(--fast) var(--ease);
}

.page-about .chapter__index:hover,
.page-about .chapter__index:focus-visible {
  color: var(--gold);
  -webkit-text-stroke-color: var(--gold);
}

.page-about .chapter__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 3.1vw, 40px);
  line-height: 1.26;
  letter-spacing: -0.006em;
  color: var(--ink);
  margin: 0 0 22px;
  max-width: 22ch;
}

.page-about .chapter__body p {
  color: var(--ab-ink-soft);
}

/* 深色分区 */

.page-about .chapter--deep {
  background: var(--sea);
  color: var(--on-deep);
  padding-bottom: var(--ab-chapter-y);
}

.page-about .chapter--deep .chapter__title {
  color: var(--paper);
}

.page-about .chapter--deep .chapter__body p {
  color: var(--on-deep);
}

.page-about .chapter--deep .chapter__index {
  -webkit-text-stroke-color: var(--gold-light);
}

.page-about .chapter--deep .chapter__index:hover,
.page-about .chapter--deep .chapter__index:focus-visible {
  color: var(--gold-light);
}

/* ---------- 时间轴 ---------- */

.page-about .timeline {
  list-style: none;
  margin: 38px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 30px 30px;
  border-left: 1px solid rgba(200, 162, 74, .5);
}

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

.page-about .timeline__dot {
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(200, 162, 74, .16);
}

.page-about .timeline__era {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold);
  margin: 0 0 10px;
}

.page-about .timeline__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.42;
  color: var(--ink);
  margin: 0 0 10px;
}

.page-about .timeline__text {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ab-ink-soft);
  margin: 0;
}

.page-about .timeline__count {
  display: inline-block;
  margin-left: 10px;
  padding: 2px 9px;
  border-radius: var(--r-pill);
  background: var(--gold-mist);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: #7A5C18;
  transition: background-color var(--fast) var(--ease);
}

.page-about .timeline__item:hover .timeline__count,
.page-about .timeline__item:focus-within .timeline__count {
  background: #E4D2A4;
}

/* ---------- 图文并排 ---------- */

.page-about .split {
  display: grid;
  gap: 28px;
  margin-top: 26px;
}

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

.page-about .split__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--r-md);
  background: var(--gold-mist);
}

.page-about .split__media figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  letter-spacing: .03em;
}

.page-about .chapter--deep .split__media figcaption {
  color: var(--on-deep-dim);
}

.page-about .split__text p:first-child {
  margin-top: 0;
}

/* ---------- 团队分工 ---------- */

.page-about .team-list {
  margin: 34px 0 30px;
  border-top: 1px solid var(--ab-line);
}

.page-about .team-list__row {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "name count"
    "desc desc";
  gap: 6px 18px;
  padding: 18px 14px;
  border-bottom: 1px solid var(--ab-line);
  transition: background-color var(--fast) var(--ease);
}

.page-about .team-list__row:hover {
  background: var(--gold-mist);
}

.page-about .team-list__name {
  grid-area: name;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .team-list__count {
  grid-area: count;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 500;
  line-height: 1;
  color: var(--gold);
  text-align: right;
}

.page-about .team-list__desc {
  grid-area: desc;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ab-ink-soft);
}

/* ---------- 三条原则 ---------- */

.page-about .principles {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .principles__item {
  padding: 6px 0 6px 20px;
  border-left: 2px solid var(--gold);
}

.page-about .principles__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.44;
  color: var(--ink);
  margin: 0 0 10px;
}

.page-about .principles__text {
  font-size: 15px;
  line-height: 1.88;
  color: var(--ab-ink-soft);
  margin: 0;
}

/* ---------- 尾部延伸 ---------- */

.page-about .about-next {
  margin-top: var(--ab-chapter-y);
  padding: clamp(56px, 7vw, 104px) 0 clamp(56px, 7vw, 96px);
  background: var(--sand);
}

.page-about .about-next__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.3;
  color: var(--ink);
  margin: 0;
}

.page-about .about-next__note {
  font-size: 16px;
  line-height: 1.88;
  color: #4A4438;
  max-width: 58ch;
  margin: 16px 0 0;
}

.page-about .next-links {
  list-style: none;
  margin: 38px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(16, 22, 28, .16);
}

.page-about .next-links__item {
  border-bottom: 1px solid rgba(16, 22, 28, .14);
}

.page-about .next-links__link {
  display: grid;
  gap: 4px;
  padding: 20px 4px;
  text-decoration: none;
  transition: background-color var(--fast) var(--ease), padding-left var(--fast) var(--ease);
}

.page-about .next-links__link:hover,
.page-about .next-links__link:focus-visible {
  background: rgba(245, 242, 236, .72);
  padding-left: 14px;
}

.page-about .next-links__label {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.4;
  color: var(--sea);
}

.page-about .next-links__desc {
  font-size: 14px;
  line-height: 1.7;
  color: #5A5346;
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-about .team-list__row {
    grid-template-columns: 108px 76px minmax(0, 1fr);
    grid-template-areas: "name count desc";
    align-items: baseline;
    gap: 16px;
    padding: 20px 14px;
  }

  .page-about .team-list__count {
    text-align: left;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: var(--ab-note-w) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-hero__figure {
    margin-top: -56px;
  }

  .page-about .chapter__grid {
    grid-template-columns: var(--ab-note-w) minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .chapter__note {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

  .page-about .timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 30px;
    margin-top: 44px;
  }

  .page-about .timeline__item {
    padding: 28px 0 0;
    border-left: 0;
    border-top: 1px solid rgba(200, 162, 74, .5);
  }

  .page-about .timeline__item:last-child {
    border-top-color: rgba(200, 162, 74, .5);
  }

  .page-about .timeline__dot {
    left: 0;
    top: -5px;
  }

  .page-about .principles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 34px;
    margin-top: 40px;
  }

  .page-about .next-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 40px;
    border-top: 0;
  }

  .page-about .next-links__item {
    border-top: 1px solid rgba(16, 22, 28, .16);
  }
}

@media (min-width: 980px) {
  .page-about .split {
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 48px;
    align-items: start;
  }

  .page-about .split--reverse {
    grid-template-columns: 360px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .chapter__index,
  .page-about .timeline__count,
  .page-about .team-list__row,
  .page-about .next-links__link {
    transition: none;
  }
}
<<<END>>>