.page-about {
  --about-radius: 14px;
  --about-rule: rgba(231, 206, 147, .16);
  display: block;
  background: var(--ink);
  color: var(--text-ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-head);
  letter-spacing: -0.01em;
  margin: 0;
}

.page-about p {
  margin: 0;
}

.page-about .breadcrumb {
  padding-top: clamp(1rem, 3vw, 1.75rem);
  padding-bottom: clamp(1rem, 3vw, 1.75rem);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: clamp(1rem, 3vw, 2rem);
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -10% -5% 0;
  background:
    radial-gradient(58% 52% at 84% 10%, rgba(201, 162, 77, .17), transparent 70%),
    radial-gradient(46% 46% at 4% 84%, rgba(95, 143, 124, .13), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 4vw, 3rem);
  align-items: start;
}

.page-about .about-hero__rail {
  display: flex;
  align-items: center;
  gap: .9rem;
  padding-bottom: .9rem;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-hero__since {
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--gold);
  white-space: nowrap;
}

.page-about .v-note {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(231, 206, 147, .72);
}

.page-about .about-hero__lead {
  display: flex;
  flex-direction: column;
  gap: clamp(1rem, 2.4vw, 1.5rem);
}

.page-about .about-hero h1 {
  font-size: clamp(2rem, 6.6vw, 3.5rem);
  line-height: 1.18;
  font-weight: 800;
  color: var(--white);
  max-width: 22ch;
}

.page-about .about-hero .lede {
  max-width: 46ch;
  color: var(--text-ink);
  font-size: var(--step-1);
  line-height: 1.75;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: .5rem 0 0;
  padding: 0;
  list-style: none;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .about-hero__fact {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding: .9rem 1rem;
  background: var(--ink-2);
}

.page-about .about-hero__fact-num {
  font-size: 1.35rem;
  color: var(--gold);
  font-weight: 600;
}

.page-about .about-hero__fact-label {
  font-size: var(--step--1);
  color: var(--steel);
}

/* ---------- 由来与定位 ---------- */
.page-about .about-origin {
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-origin h2 {
  font-size: clamp(1.6rem, 4.4vw, 2.5rem);
  line-height: 1.25;
  color: var(--white);
  margin-top: .8rem;
}

.page-about .about-origin__body {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.page-about .about-origin__body .prose {
  max-width: 62ch;
  color: var(--text-ink);
  font-size: var(--step-0);
  line-height: 1.85;
}

.page-about .about-origin__links {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: .4rem;
}

/* ---------- 通用图片框 ---------- */
.page-about .about-figure {
  margin: 0;
  position: relative;
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid var(--about-rule);
  background: var(--ink);
}

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

.page-about .about-figure .media-caption {
  margin: 0;
  padding: .75rem 1rem;
  font-size: var(--step--1);
  color: var(--steel);
  background: rgba(14, 17, 20, .72);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-figure--wide {
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .about-figure--band {
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .about-figure--square {
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
  max-width: 420px;
}

/* ---------- 编目团队 ---------- */
.page-about .about-crew {
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-crew__head h2 {
  font-size: clamp(1.6rem, 4.4vw, 2.5rem);
  line-height: 1.25;
  color: var(--white);
  margin-top: .8rem;
}

.page-about .about-crew__head .lede {
  margin-top: .9rem;
  max-width: 54ch;
  color: var(--text-ink);
  font-size: var(--step-0);
  line-height: 1.8;
}

.page-about .about-crew__tabs {
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
}

.page-about .about-crew__tabs .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  border-bottom: 1px solid var(--about-rule);
  padding-bottom: .6rem;
}

.page-about .about-crew__tabs .tabs__tab {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  padding: .55rem .95rem;
  border: 1px solid var(--about-rule);
  border-radius: 999px;
  background: transparent;
  color: var(--text-ink);
  cursor: pointer;
  transition: color .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
}

.page-about .about-crew__tabs .tabs__tab:hover {
  border-color: var(--line-strong);
  color: var(--gold-soft);
}

.page-about .about-crew__tabs .tabs__tab[aria-selected="true"] {
  background: rgba(201, 162, 77, .14);
  border-color: var(--gold);
  color: var(--gold);
}

.page-about .about-crew__panel {
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border: 1px solid var(--about-rule);
  border-left: 3px solid var(--gold);
  border-radius: var(--about-radius);
  background: var(--glass);
}

.page-about .about-crew__panel + .about-crew__panel {
  margin-top: 1rem;
}

.page-about .about-crew__name {
  font-size: var(--step-2);
  color: var(--white);
}

.page-about .about-crew__badge {
  display: inline-block;
  margin-top: .5rem;
  padding: .25rem .6rem;
  border-radius: 4px;
  background: rgba(95, 143, 124, .16);
  color: var(--celadon);
  font-size: 12px;
  letter-spacing: .1em;
}

.page-about .about-crew__panel p {
  margin-top: .9rem;
  max-width: 62ch;
  line-height: 1.8;
  color: var(--text-ink);
}

.page-about .about-crew__duties {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .5rem;
}

.page-about .about-crew__duties li {
  position: relative;
  padding-left: 1.1rem;
  font-size: var(--step--1);
  color: var(--steel);
  line-height: 1.7;
}

.page-about .about-crew__duties li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}

/* ---------- 时间线 ---------- */
.page-about .about-tl-section {
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-tl__head h2 {
  font-size: clamp(1.6rem, 4.4vw, 2.5rem);
  line-height: 1.25;
  color: var(--white);
  margin-top: .8rem;
}

.page-about .about-tl__head .lede {
  margin-top: .9rem;
  max-width: 58ch;
  color: var(--text-ink);
  font-size: var(--step-0);
  line-height: 1.8;
}

.page-about .about-timeline {
  list-style: none;
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding: 0 0 0 2.25rem;
  position: relative;
  display: grid;
  gap: clamp(.9rem, 2vw, 1.25rem);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(201, 162, 77, .28) 60%, rgba(201, 162, 77, .06) 100%);
}

.page-about .about-timeline__node {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: .5rem;
  padding: 1.05rem 1.15rem;
  border: 1px solid var(--about-rule);
  border-radius: var(--about-radius);
  background: var(--glass);
  transition: border-color .3s var(--ease), transform .3s var(--ease), background .3s var(--ease);
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  top: 1.5rem;
  left: -34px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 77, .1);
}

.page-about .about-timeline__node--current {
  border-color: rgba(192, 57, 43, .5);
  background: rgba(192, 57, 43, .07);
}

.page-about .about-timeline__node--current::before {
  border-color: var(--cinnabar);
  box-shadow: 0 0 0 4px rgba(192, 57, 43, .16);
}

.page-about .about-timeline__node:hover,
.page-about .about-timeline__node:focus-within {
  border-color: var(--line-strong);
  transform: translateX(3px);
}

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

.page-about .about-timeline__year {
  font-size: var(--step--1);
  letter-spacing: .06em;
  color: var(--celadon);
}

.page-about .about-timeline__node--current .about-timeline__year {
  color: var(--cinnabar);
}

.page-about .about-timeline__title {
  margin-top: .35rem;
  font-size: var(--step-1);
  color: var(--white);
  font-family: var(--font-body);
  font-weight: 600;
}

.page-about .about-timeline__text {
  margin-top: .45rem;
  max-width: 60ch;
  font-size: var(--step-0);
  line-height: 1.75;
  color: var(--text-ink);
}

.page-about .about-timeline__extra {
  margin-top: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: var(--step--1);
  line-height: 1.7;
  color: var(--gold-soft);
  transition: max-height .35s var(--ease), opacity .35s var(--ease), margin-top .35s var(--ease);
}

.page-about .about-timeline__node:hover .about-timeline__extra,
.page-about .about-timeline__node:focus-within .about-timeline__extra {
  max-height: 6rem;
  opacity: 1;
  margin-top: .55rem;
}

.page-about .about-tl__foot {
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
  font-size: var(--step--1);
  color: var(--steel);
  line-height: 1.8;
}

.page-about .about-tl__foot a {
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(231, 206, 147, .38);
}

.page-about .about-tl__foot a:hover {
  color: var(--gold);
}

/* ---------- 流程（宣纸米底） ---------- */
.page-about .section--paper {
  background: var(--paper);
  color: var(--graphite);
}

.page-about .about-flow-section {
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-flow-section h2,
.page-about .about-flow-section h3 {
  color: var(--ink);
}

.page-about .about-flow-section .eyebrow {
  color: #8a6d21;
}

.page-about .about-flow__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-flow__aside h2 {
  font-size: clamp(1.6rem, 4.4vw, 2.4rem);
  line-height: 1.25;
  margin-top: .8rem;
}

.page-about .about-flow__lead {
  margin-top: .9rem;
  max-width: 46ch;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .about-flow__aside .about-figure {
  border-color: rgba(14, 17, 20, .16);
  background: var(--white);
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(14, 17, 20, .16);
}

.page-about .about-flow__step {
  border-bottom: 1px solid rgba(14, 17, 20, .16);
}

.page-about .about-flow__step details > summary {
  display: flex;
  align-items: baseline;
  gap: .9rem;
  padding: 1.05rem 0;
  cursor: pointer;
  list-style: none;
}

.page-about .about-flow__step details > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-flow__step details > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  color: #8a6d21;
  line-height: 1;
}

.page-about .about-flow__step details[open] > summary::after {
  content: "–";
}

.page-about .about-flow__num {
  flex: none;
  font-size: 12px;
  letter-spacing: .14em;
  color: #8a6d21;
}

.page-about .about-flow__name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--step-1);
  color: var(--ink);
}

.page-about .about-flow__detail {
  padding: 0 0 1.2rem;
  max-width: 62ch;
}

.page-about .about-flow__detail p {
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .about-flow__detail ul {
  margin: .8rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .45rem;
}

.page-about .about-flow__detail li {
  position: relative;
  padding-left: 1.15rem;
  font-size: var(--step--1);
  line-height: 1.7;
  color: #5b6169;
}

.page-about .about-flow__detail li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .6em;
  width: 7px;
  height: 2px;
  background: var(--gold);
}

/* ---------- 巡检 ---------- */
.page-about .about-sweep-section {
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-sweep__head h2 {
  font-size: clamp(1.6rem, 4.4vw, 2.5rem);
  line-height: 1.25;
  color: var(--white);
  margin-top: .8rem;
}

.page-about .about-sweep__head .lede {
  margin-top: .9rem;
  max-width: 56ch;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--text-ink);
}

.page-about .about-sweep {
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border: 1px solid var(--about-rule);
  border-radius: var(--about-radius);
  background: var(--glass);
}

.page-about .about-sweep__scale {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 6px;
  padding-bottom: 1.25rem;
  border-bottom: 1px dashed rgba(231, 206, 147, .22);
}

.page-about .about-sweep__tick {
  display: block;
  height: 34px;
  border-radius: 3px;
  background: linear-gradient(180deg, rgba(201, 162, 77, .85), rgba(201, 162, 77, .18));
}

.page-about .about-sweep__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 1.35rem 0 0;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
  border-radius: 10px;
  overflow: hidden;
}

.page-about .about-sweep__stat {
  padding: 1rem;
  background: var(--ink-2);
}

.page-about .about-sweep__stat dt {
  font-size: 1.2rem;
  color: var(--gold);
  font-weight: 600;
  letter-spacing: .02em;
}

.page-about .about-sweep__stat dd {
  margin: .4rem 0 0;
  font-size: var(--step--1);
  line-height: 1.65;
  color: var(--steel);
}

.page-about .about-sweep__note {
  margin-top: 1.25rem;
  max-width: 66ch;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--text-ink);
}

/* ---------- 兼容性 ---------- */
.page-about .about-compat {
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-compat__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-compat__head h2 {
  font-size: clamp(1.6rem, 4.4vw, 2.5rem);
  line-height: 1.25;
  color: var(--white);
  margin-top: .8rem;
}

.page-about .about-compat__head .lede {
  margin-top: .9rem;
  max-width: 50ch;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--text-ink);
}

.page-about .about-compat__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .about-compat__item {
  padding: 1.05rem 1.15rem;
  background: var(--ink);
  border-left: 3px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}

.page-about .about-compat__item:hover {
  border-left-color: var(--gold);
  background: var(--ink-3);
}

.page-about .about-compat__key {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--celadon);
}

.page-about .about-compat__item p {
  margin-top: .45rem;
  font-size: var(--step-0);
  line-height: 1.75;
  color: var(--text-ink);
}

/* ---------- 联系 ---------- */
.page-about .about-contact-section {
  padding-top: clamp(2rem, 5vw, 3.5rem);
  padding-bottom: clamp(3rem, 7vw, 5rem);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-contact {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border: 1px solid var(--about-rule);
  border-radius: 18px;
  background:
    linear-gradient(150deg, rgba(201, 162, 77, .12), transparent 55%),
    var(--ink-2);
}

.page-about .about-contact__lead h2 {
  font-size: clamp(1.5rem, 4vw, 2.15rem);
  line-height: 1.28;
  color: var(--white);
  margin-top: .8rem;
}

.page-about .about-contact__lead p {
  margin-top: .9rem;
  max-width: 46ch;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--text-ink);
}

.page-about .about-contact__lead .btn {
  margin-top: 1.25rem;
}

.page-about .about-contact__dl {
  margin: 0;
  display: grid;
  gap: 1rem;
}

.page-about .about-contact__row {
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--about-rule);
}

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

.page-about .about-contact__row dt {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-about .about-contact__row dd {
  margin: .4rem 0 0;
  font-size: var(--step-0);
  line-height: 1.75;
  color: var(--white);
  word-break: break-word;
}

.page-about .about-contact__hint {
  display: inline-block;
  margin-top: .35rem;
  font-size: var(--step--1);
  color: var(--steel);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: clamp(2rem, 4vw, 3.25rem);
  }

  .page-about .about-hero__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.1rem;
    padding-bottom: 0;
    padding-left: 1.1rem;
    border-bottom: 0;
    border-left: 1px solid var(--about-rule);
    align-self: stretch;
  }

  .page-about .v-note {
    writing-mode: vertical-rl;
    letter-spacing: .22em;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-about .about-origin__head {
    position: sticky;
    top: 7rem;
    align-self: start;
  }

  .page-about .about-crew__tabs .tabs__list {
    gap: .75rem;
  }

  .page-about .about-timeline__node {
    grid-template-columns: 3.5rem minmax(0, 1fr);
    gap: 1.1rem;
    align-items: start;
  }

  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-about .about-flow__aside {
    position: sticky;
    top: 7rem;
    align-self: start;
  }

  .page-about .about-flow__aside .about-figure--square {
    max-width: 320px;
  }

  .page-about .about-compat__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-about .about-contact {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }
}

@media (max-width: 559px) {
  .page-about .about-sweep__scale {
    gap: 4px;
  }

  .page-about .about-sweep__tick {
    height: 26px;
  }

  .page-about .about-timeline {
    padding-left: 1.75rem;
  }

  .page-about .about-timeline::before {
    left: 4px;
  }

  .page-about .about-timeline__node::before {
    left: -26px;
  }

  .page-about .about-crew__tabs .tabs__tab,
  .page-about .about-flow__name {
    font-size: var(--step-0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__node,
  .page-about .about-timeline__extra,
  .page-about .about-compat__item,
  .page-about .about-crew__tabs .tabs__tab {
    transition: none;
  }
}
<<<END>>>