.page-about {
  --hist-gap: clamp(20px, 4vw, 48px);
  --hist-line: rgba(201, 164, 92, 0.22);
  background:
    radial-gradient(120% 70% at 90% -5%, rgba(30, 74, 58, 0.55), transparent 62%),
    var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about .wrap {
  padding-inline: var(--gutter);
}

/* ---------- 首屏 ---------- */
.page-about .hist-hero {
  position: relative;
  padding: clamp(20px, 3.6vw, 36px) 0 clamp(34px, 5.5vw, 68px);
  border-bottom: 1px solid var(--hist-line);
  background:
    radial-gradient(110% 80% at 86% 0%, rgba(201, 164, 92, 0.14), transparent 58%),
    linear-gradient(165deg, rgba(8, 27, 22, 0.2) 0%, rgba(16, 42, 35, 0.85) 48%, rgba(8, 27, 22, 1) 100%);
}

.page-about .hist-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, rgba(201, 164, 92, 0.06) 0 1px, transparent 1px 84px);
  pointer-events: none;
}

.page-about .hist-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.6vw, 40px);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--cool);
}

.page-about .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--gold-lit);
  border-bottom-color: var(--gold);
}

.page-about .hist-hero .eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-about .hist-hero .eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--gold);
}

.page-about .hist-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(29px, 5.4vw, 58px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .hist-hero__lede {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--paper-soft);
}

.page-about .hist-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .hist-hero__actions .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.page-about .hist-hero__actions .btn__num {
  font-family: var(--mono);
  font-size: 11px;
  opacity: 0.7;
}

.page-about .hist-figure {
  margin: 0;
  border: 1px solid var(--hist-line);
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
}

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

.page-about .hist-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid rgba(110, 131, 120, 0.28);
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--mist);
}

.page-about .hist-hero__media {
  position: relative;
}

.page-about .hist-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(197, 59, 50, 0.16), transparent 42%);
  pointer-events: none;
}

.page-about .hist-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: rgba(110, 131, 120, 0.3);
  border: 1px solid var(--hist-line);
}

.page-about .hist-hero__stat {
  background: rgba(8, 27, 22, 0.82);
  padding: 14px 16px;
}

.page-about .hist-hero__stat dt {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .hist-hero__stat dd {
  margin: 6px 0 0;
  font-family: var(--mono);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 600;
  color: var(--gold-lit);
}

/* ---------- 通用区块 ---------- */
.page-about .hist-section {
  padding: clamp(38px, 6.5vw, 88px) 0;
  border-bottom: 1px solid rgba(110, 131, 120, 0.24);
}

.page-about .hist-section--end {
  border-bottom: 0;
}

.page-about .hist-section__head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .sec-num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(34px, 6vw, 60px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: transparent;
  -webkit-text-stroke: 1px var(--gold);
  text-stroke: 1px var(--gold);
  opacity: 0.85;
}

.page-about .hist-section h2 {
  margin: 0;
  font-size: clamp(23px, 3.4vw, 37px);
  font-weight: 900;
  line-height: 1.16;
  color: var(--paper);
}

.page-about .hist-section__lede {
  margin: 4px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .meta {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mist);
}

.page-about .hist-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--gold-lit);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid var(--hist-line);
  padding-bottom: 2px;
  transition: color 180ms ease, border-color 180ms ease;
}

.page-about .hist-link:hover,
.page-about .hist-link:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--gold-lit);
}

.page-about .notice {
  border-left: 3px solid var(--track);
  background: rgba(197, 59, 50, 0.1);
  padding: 16px 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--paper-soft);
}

/* ---------- 01 起点 ---------- */
.page-about .hist-origin {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 40px);
}

.page-about .hist-origin__body p {
  margin: 0 0 14px;
  max-width: 70ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--paper-soft);
}

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

.page-about .hist-origin__aside {
  border-top: 1px solid var(--hist-line);
  padding-top: 16px;
}

.page-about .hist-origin__quote {
  margin: 0 0 10px;
  font-size: clamp(16px, 2.2vw, 19px);
  font-weight: 700;
  line-height: 1.6;
  color: var(--gold-lit);
  padding-left: 14px;
  border-left: 2px solid var(--gold);
}

.page-about .hist-origin__links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 18px;
}

/* ---------- 02 时间轴 ---------- */
.page-about .hist-ruler {
  display: block;
  width: 100%;
  height: 18px;
  margin-bottom: 4px;
}

.page-about .hist-track {
  list-style: none;
  margin: 0 0 clamp(28px, 4vw, 48px);
  padding: 0;
}

.page-about .hist-stage {
  position: relative;
  padding: 20px 0 20px 22px;
  border-left: 1px solid var(--hist-line);
}

.page-about .hist-stage::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 28px;
  width: 7px;
  height: 7px;
  background: var(--ink);
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}

.page-about .hist-stage[data-state="now"]::before {
  background: var(--gold-lit);
  border-color: var(--gold-lit);
  box-shadow: 0 0 0 4px rgba(232, 201, 131, 0.16);
}

.page-about .hist-stage__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 12px;
}

.page-about .hist-stage__num {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .hist-stage__label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  padding: 3px 8px;
  border: 1px solid rgba(110, 131, 120, 0.34);
}

.page-about .hist-stage[data-state="now"] .hist-stage__label {
  color: var(--gold-lit);
  border-color: var(--gold);
}

.page-about .hist-card {
  background: linear-gradient(180deg, rgba(16, 42, 35, 0.92), rgba(8, 27, 22, 0.92));
  border: 1px solid rgba(201, 164, 92, 0.18);
  box-shadow: var(--shadow);
  padding: clamp(16px, 2.4vw, 26px);
}

.page-about .hist-card h3 {
  margin: 0 0 8px;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .hist-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper-soft);
}

.page-about .hist-card .fold {
  margin-top: 14px;
  border-top: 1px solid rgba(110, 131, 120, 0.26);
  padding-top: 12px;
}

.page-about .fold__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  font-size: 13.5px;
  color: var(--gold);
  list-style: none;
}

.page-about .fold__head::-webkit-details-marker {
  display: none;
}

.page-about .fold__head::after {
  content: "+";
  font-family: var(--mono);
  font-size: 15px;
  color: var(--gold);
}

.page-about details[open] > .fold__head::after {
  content: "−";
}

.page-about .fold__body {
  padding-top: 10px;
}

.page-about .fold__body p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* 轮次标签页 */
.page-about .hist-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-about .hist-tab {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  padding: 9px 14px;
  background: transparent;
  border: 1px solid rgba(110, 131, 120, 0.36);
  color: var(--mist);
  cursor: pointer;
  transition: color 200ms ease, border-color 200ms ease, background-color 200ms ease;
}

.page-about .hist-tab:hover {
  color: var(--paper);
  border-color: var(--gold);
}

.page-about .hist-tab[aria-selected="true"] {
  color: var(--gold-lit);
  border-color: var(--gold);
  background: rgba(201, 164, 92, 0.12);
}

.page-about .hist-tab:focus-visible {
  outline: 2px solid var(--gold-lit);
  outline-offset: 2px;
}

.page-about .hist-tabs__panel {
  padding: 18px 0 4px 18px;
  border-left: 2px solid rgba(201, 164, 92, 0.5);
  animation: hist-fade 220ms ease both;
}

.page-about .hist-tabs__panel[hidden] {
  display: none;
}

.page-about .hist-tabs__panel h3 {
  margin: 6px 0 8px;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 800;
  color: var(--paper);
}

.page-about .hist-tabs__panel p {
  margin: 0 0 10px;
  max-width: 66ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--paper-soft);
}

@keyframes hist-fade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 03 团队 ---------- */
.page-about .hist-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
}

.page-about .hist-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hist-line);
}

.page-about .hist-role {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(110, 131, 120, 0.26);
}

.page-about .hist-role__name {
  font-size: 16px;
  font-weight: 800;
  color: var(--gold-lit);
  letter-spacing: 0.02em;
}

.page-about .hist-role__desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper-soft);
}

.page-about .hist-team__note {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--pine);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 04 覆盖 ---------- */
.page-about .hist-coverage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  padding: 1px;
  background: rgba(110, 131, 120, 0.28);
  border: 1px solid var(--hist-line);
  margin-bottom: 20px;
}

.page-about .hist-coverage__item {
  background: rgba(16, 42, 35, 0.9);
  padding: 18px 18px 20px;
  position: relative;
}

.page-about .hist-coverage__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 18px;
  width: 34px;
  height: 2px;
  background: var(--gold);
}

.page-about .hist-coverage__num {
  display: block;
  margin-top: 8px;
  font-family: var(--mono);
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold-lit);
}

.page-about .hist-coverage__item h3 {
  margin: 8px 0 6px;
  font-size: 15.5px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .hist-coverage__item p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 05 流程 ---------- */
.page-about .hist-process {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
}

.page-about .hist-step {
  border: 1px solid rgba(110, 131, 120, 0.3);
  border-top: 1px solid var(--hist-line);
  background: rgba(16, 42, 35, 0.6);
  padding: 14px 16px;
  margin-bottom: 10px;
}

.page-about .hist-step[open] {
  border-color: rgba(201, 164, 92, 0.42);
  background: rgba(16, 42, 35, 0.9);
}

.page-about .hist-step .fold__head {
  color: var(--paper);
}

.page-about .hist-step__num {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--gold);
  margin-right: 12px;
}

.page-about .hist-step__title {
  flex: 1;
  font-size: 15.5px;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.page-about .hist-step .fold__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--paper-soft);
}

/* ---------- 结尾入口 ---------- */
.page-about .hist-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
}

.page-about .hist-next__lead h2 {
  margin: 0 0 8px;
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 900;
  line-height: 1.18;
  color: var(--paper);
}

.page-about .hist-next__lead p {
  margin: 0;
  max-width: 40ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .hist-next__links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .hist-next__card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  text-decoration: none;
  background: rgba(16, 42, 35, 0.78);
  border: 1px solid rgba(201, 164, 92, 0.2);
  transition: border-color 200ms ease, transform 200ms ease, background-color 200ms ease;
}

.page-about .hist-next__card:hover,
.page-about .hist-next__card:focus-visible {
  border-color: var(--gold-lit);
  background: rgba(30, 74, 58, 0.82);
  transform: translateY(-2px);
}

.page-about .hist-next__card .id-card__num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .hist-next__card .id-card__title {
  font-size: 15px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .hist-next__card .id-card__meta {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .hist-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
    column-gap: clamp(28px, 4vw, 56px);
  }

  .page-about .hist-hero__stats {
    grid-column: 1 / -1;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .hist-origin {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: clamp(28px, 4vw, 56px);
  }

  .page-about .hist-origin__aside {
    border-top: 0;
    border-left: 1px solid var(--hist-line);
    padding-top: 0;
    padding-left: clamp(18px, 2.4vw, 28px);
  }

  .page-about .hist-stage {
    display: grid;
    grid-template-columns: minmax(120px, 156px) minmax(0, 1fr);
    column-gap: clamp(22px, 3.4vw, 52px);
    padding: 26px 0 26px 30px;
  }

  .page-about .hist-stage::before {
    top: 34px;
  }

  .page-about .hist-stage__head {
    display: block;
    margin-bottom: 0;
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .hist-stage__num {
    display: block;
    font-size: 26px;
  }

  .page-about .hist-stage__label {
    display: inline-block;
    margin-top: 8px;
    font-size: 11.5px;
  }

  .page-about .hist-team {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
    column-gap: clamp(28px, 4vw, 52px);
  }

  .page-about .hist-coverage {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .hist-process {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
    column-gap: clamp(28px, 4vw, 52px);
  }

  .page-about .hist-step {
    margin-bottom: 12px;
  }

  .page-about .hist-next {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    column-gap: clamp(28px, 4vw, 52px);
    align-items: start;
  }

  .page-about .hist-next__links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1280px) {
  .page-about .hist-hero h1 {
    max-width: 15ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .hist-tabs__panel,
  .page-about .hist-next__card {
    animation: none;
    transition: none;
  }

  .page-about .hist-next__card:hover {
    transform: none;
  }
}
<<<END>>>