.page-about {
  --about-label-w: 172px;
  --about-gold-wash: rgba(201, 162, 39, .10);
  background-color: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(118% 88% at 90% -6%, rgba(201, 162, 39, .13), transparent 60%),
    linear-gradient(180deg, var(--paper-2) 0%, var(--paper) 78%);
  overflow: hidden;
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  padding-top: clamp(96px, 13vh, 148px);
  padding-bottom: clamp(40px, 6vw, 76px);
}

.page-about .about-eyebrow {
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cinnabar);
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-title);
  font-size: clamp(34px, 8vw, 72px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -.02em;
  max-width: 15ch;
}

.page-about .about-hero__lead {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.9;
  color: rgba(16, 17, 20, .8);
}

.page-about .about-hero__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 14px clamp(22px, 3.4vw, 46px);
  margin: clamp(26px, 3.6vw, 40px) 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .about-hero__lbl {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--slate);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  max-width: 340px;
}

.page-about .about-hero__figure::before {
  content: "";
  position: absolute;
  left: -16px;
  bottom: -12px;
  width: 92px;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), transparent);
  transform: rotate(-36deg);
  transform-origin: left center;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-paper);
}

/* ---------- 文档主体 ---------- */
.page-about .about-doc {
  padding-bottom: clamp(44px, 6vw, 84px);
}

.page-about .about-block {
  position: relative;
  padding-block: clamp(38px, 5.6vw, 76px);
  border-top: 1px solid var(--line);
}

.page-about .about-block:first-child {
  border-top: 0;
}

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

.page-about .about-label {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-label__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--cinnabar);
}

.page-about .about-label__name {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--slate);
}

.page-about .about-h2 {
  margin: 0 0 18px;
  font-family: var(--font-title);
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -.01em;
  max-width: 26ch;
}

.page-about .about-p {
  margin: 0 0 16px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.88;
  color: rgba(16, 17, 20, .86);
}

.page-about .about-p--spaced {
  margin-top: clamp(26px, 3.4vw, 40px);
}

.page-about .about-note {
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  max-width: 46em;
  padding-left: 12px;
  border-left: 1px solid var(--line-strong);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 时间轴 ---------- */
.page-about .about-nodes {
  list-style: none;
  position: relative;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
}

.page-about .about-nodes::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--slate), rgba(110, 123, 133, .18));
}

.page-about .about-node {
  position: relative;
  padding: 0 0 clamp(26px, 3.4vw, 40px) 34px;
}

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

.page-about .about-node__dot {
  position: absolute;
  left: 0;
  top: 5px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--cinnabar);
  box-shadow: 0 0 0 3px var(--paper), 0 0 0 4px rgba(200, 51, 43, .3);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-node:hover .about-node__dot {
  transform: scale(1.3);
  box-shadow: 0 0 0 3px var(--paper), 0 0 0 7px rgba(200, 51, 43, .18);
}

.page-about .about-node__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .05em;
  color: var(--ink);
  transition: color var(--dur) var(--ease);
}

.page-about .about-node:hover .about-node__year {
  color: var(--cinnabar-deep);
}

.page-about .about-node__title {
  margin: 5px 0 6px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: .01em;
}

.page-about .about-node__text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(16, 17, 20, .76);
}

/* ---------- 版本表 ---------- */
.page-about .about-versions__scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--paper);
}

.page-about .about-versions {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-versions caption {
  padding: 14px 16px 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--slate);
  border-bottom: 1px solid var(--line);
}

.page-about .about-versions th,
.page-about .about-versions td {
  padding: 13px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.page-about .about-versions thead th {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--slate);
  white-space: nowrap;
  border-bottom: 1px solid var(--line-strong);
}

.page-about .about-versions tbody tr:nth-child(even) {
  background: var(--paper-2);
}

.page-about .about-versions tbody tr:hover {
  background: var(--about-gold-wash);
}

.page-about .about-versions tbody th {
  font-weight: 500;
}

.page-about .about-ver {
  display: inline-block;
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--ink);
  border-bottom: 1px solid var(--gold);
  white-space: nowrap;
}

.page-about .about-figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  border: 1px solid var(--line-strong);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  max-width: 46em;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 流程与团队 ---------- */
.page-about .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 .about-flow__step {
  background: var(--paper);
  padding: clamp(18px, 2.4vw, 26px);
}

.page-about .about-flow__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cinnabar);
}

.page-about .about-flow__title {
  margin: 10px 0 8px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .01em;
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(16, 17, 20, .76);
}

.page-about .about-team {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-team__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: var(--paper);
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 500;
  line-height: 1;
  color: var(--ink);
}

.page-about .about-team__lbl {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--slate);
}

/* ---------- 来源与边界 ---------- */
.page-about .about-source {
  display: grid;
  gap: clamp(16px, 2.2vw, 24px);
  margin-top: clamp(6px, 1vw, 12px);
}

.page-about .about-source__panel {
  padding: clamp(20px, 2.6vw, 30px);
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow-paper);
}

.page-about .about-source__panel--limit {
  background: var(--ink);
  border-color: var(--ink);
  box-shadow: 5px 5px 0 -1px var(--ink-2), 5px 5px 0 0 var(--gold);
}

.page-about .about-source__title {
  margin: 0 0 14px;
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .01em;
}

.page-about .about-source__panel--limit .about-source__title {
  color: var(--gold-lite);
}

.page-about .about-source__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-source__list li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(16, 17, 20, .82);
}

.page-about .about-source__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 1px;
  background: var(--cinnabar);
}

.page-about .about-source__panel--limit .about-source__list li {
  color: rgba(245, 242, 234, .84);
}

.page-about .about-source__panel--limit .about-source__list li::before {
  background: var(--gold);
}

/* ---------- 地域底色 ---------- */
.page-about .about-region {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 62px);
  border: 1px solid var(--line);
  background: var(--paper-2);
}

.page-about .about-region__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: .15;
  pointer-events: none;
}

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

.page-about .about-region .about-h2 {
  max-width: 22ch;
}

/* ---------- 结尾 ---------- */
.page-about .about-block--end {
  border-top: 1px solid var(--line-strong);
}

.page-about .about-end__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 2.6vw, 30px);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-team {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

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

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

@media (min-width: 920px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(240px, .78fr);
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-hero__figure {
    max-width: none;
  }

  .page-about .about-block__inner {
    grid-template-columns: var(--about-label-w) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
  }

  .page-about .about-label {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
    padding-left: 14px;
    border-left: 2px solid var(--line-strong);
  }

  .page-about .about-block--narrow .about-block__body {
    max-width: 44em;
  }

  .page-about .about-block--narrow {
    padding-right: clamp(0px, 6vw, 96px);
  }
}

@media (min-width: 1180px) {
  .page-about .about-node {
    display: grid;
    grid-template-columns: 78px minmax(0, 1fr);
    column-gap: 20px;
    padding-left: 40px;
    align-items: start;
  }

  .page-about .about-node__year {
    padding-top: 3px;
    text-align: right;
    grid-column: 1;
  }

  .page-about .about-node__title {
    grid-column: 2;
    margin-top: 0;
  }

  .page-about .about-node__text {
    grid-column: 2;
  }

  .page-about .about-nodes::before {
    left: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node__dot,
  .page-about .about-node__year {
    transition: none;
  }

  .page-about .about-node:hover .about-node__dot {
    transform: none;
  }
}
<<<END>>>