.page-about {
  padding-bottom: 88px;
  color: var(--text);
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-top: 26px;
  margin-bottom: 0;
}

/* ---------- 首屏 ---------- */
.page-about .hist-hero {
  position: relative;
  overflow: hidden;
  padding: 34px 0 52px;
  border-bottom: 1px solid var(--line);
}

.page-about .hist-hero::before {
  content: "";
  position: absolute;
  top: -170px;
  right: -140px;
  width: 86%;
  height: 230%;
  background: linear-gradient(150deg,
      rgba(215, 177, 100, 0.18),
      rgba(255, 63, 126, 0.09) 52%,
      rgba(42, 217, 168, 0.07) 74%,
      transparent 88%);
  clip-path: polygon(40% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .hist-hero__grid {
  position: relative;
  display: grid;
  gap: 30px;
}

@media (min-width: 900px) {
  .page-about .hist-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: 52px;
    align-items: end;
  }
}

.page-about .hist-hero__kicker {
  margin: 0 0 16px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .hist-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(38px, 8.4vw, 74px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--paper);
}

.page-about .hist-hero .lede {
  margin: 0 0 28px;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--dim);
}

.page-about .hist-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  max-width: 470px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .hist-hero__stats > div {
  background: var(--ink-900);
  padding: 14px 12px 16px;
}

.page-about .hist-hero__stats dt {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--dim-2);
}

.page-about .hist-hero__stats dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 27px;
  line-height: 1;
  color: var(--gold);
}

.page-about .hist-hero__media {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--ink-800);
}

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

/* ---------- 时间轴 ---------- */
.page-about .hist-timeline {
  padding: 56px 0 8px;
}

.page-about .hist-timeline .sec-head {
  margin-bottom: 18px;
}

.page-about .hist-timeline__intro {
  margin: 0 0 38px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--dim);
}

.page-about .tl {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg,
      var(--gold),
      rgba(255, 63, 126, 0.55) 55%,
      rgba(42, 217, 168, 0.6));
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 36px 30px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 11px;
  height: 11px;
  background: var(--ink-950);
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}

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

.page-about .tl__stage {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--dim-2);
}

.page-about .tl__ver {
  display: inline-block;
  padding: 3px 8px;
  border: 1px solid var(--line-strong);
  color: var(--gold);
  letter-spacing: 0.06em;
}

.page-about .tl__title {
  margin: 0 0 10px;
  font-size: 19px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--paper);
}

.page-about .tl__text {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--dim);
}

@media (min-width: 820px) {
  .page-about .tl__item {
    padding-left: 40px;
    padding-bottom: 44px;
  }

  .page-about .tl__title {
    font-size: 21px;
  }
}

/* ---------- 宽幅图带 ---------- */
.page-about .ab-band {
  margin: 48px 0 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--ink-900);
}

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

.page-about .ab-band .media__cap {
  padding: 12px 16px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--dim-2);
}

/* ---------- 三条主线 ---------- */
.page-about .ab-lanes-sec {
  padding: 60px 0 0;
}

.page-about .ab-lanes {
  display: grid;
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 780px) {
  .page-about .ab-lanes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .ab-lane {
  position: relative;
  padding: 30px 22px 30px;
  background: var(--ink-900);
}

.page-about .ab-lane::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--gold);
}

.page-about .ab-lane:nth-child(2)::before {
  background: var(--rose);
}

.page-about .ab-lane:nth-child(3)::before {
  background: var(--jade);
}

.page-about .ab-lane__no {
  display: block;
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--dim-2);
}

.page-about .ab-lane__title {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-lane__text {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--dim);
}

.page-about .ab-lane__path {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--dim-2);
}

.page-about .ab-lane__path a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(215, 177, 100, 0.42);
}

.page-about .ab-lane__path a:hover,
.page-about .ab-lane__path a:focus-visible {
  color: var(--rose);
  border-bottom-color: rgba(255, 63, 126, 0.6);
}

/* ---------- 版本记录 ---------- */
.page-about .ab-log {
  padding: 60px 0 0;
}

.page-about .ab-log__scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--ink-900);
}

.page-about .ab-log__scroll .table {
  min-width: 640px;
}

.page-about .ab-log__note {
  margin: 18px 0 0;
  max-width: 70ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--dim-2);
  padding-left: 14px;
  border-left: 2px solid var(--gold-deep);
}

/* ---------- 图表插图 ---------- */
.page-about .ab-chart {
  margin: 52px 0 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

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

.page-about .ab-chart .media__cap {
  padding: 12px 16px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--dim-2);
  border-top: 1px solid var(--line);
}

/* ---------- 后续入口 ---------- */
.page-about .ab-next {
  padding: 60px 0 0;
}

.page-about .ab-next__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 780px) {
  .page-about .ab-next__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .ab-next__item a {
  display: block;
  height: 100%;
  padding: 26px 22px 30px;
  background: var(--ink-900);
  text-decoration: none;
  transition: background 0.25s var(--ease);
}

.page-about .ab-next__item a:hover,
.page-about .ab-next__item a:focus-visible {
  background: var(--ink-800);
}

.page-about .ab-next__n {
  display: block;
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--rose);
}

.page-about .ab-next__item strong {
  display: block;
  margin-bottom: 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-next__item em {
  display: block;
  font-style: normal;
  font-size: 14px;
  line-height: 1.8;
  color: var(--dim);
}

@media (min-width: 1000px) {
  .page-about .hist-timeline,
  .page-about .ab-lanes-sec,
  .page-about .ab-log,
  .page-about .ab-next {
    padding-top: 72px;
  }

  .page-about .hist-timeline__intro {
    margin-bottom: 46px;
  }
}
<<<END>>>