.page-about {
  --tl-rail: 2px;
  --about-gap: clamp(1rem, 3.2vw, 2.25rem);
  background: var(--paper);
  color: var(--ink);
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  list-style: none;
  margin: 0 0 clamp(1rem, 3vw, 1.75rem);
  padding: 0;
  font-size: .8125rem;
  letter-spacing: .04em;
}

.page-about .breadcrumb__item {
  color: var(--charcoal);
}

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: .5rem;
  color: var(--gold);
  font-family: var(--mono);
}

.page-about .breadcrumb__item a {
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-line);
}

.page-about .breadcrumb__item a:hover {
  border-bottom-color: var(--gold);
}

.page-about .breadcrumb__item--current {
  color: var(--paper);
  font-weight: 700;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  border-bottom: 6px solid var(--red);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .55;
  background-image: radial-gradient(rgba(245, 240, 230, .07) 1px, transparent 1px);
  background-size: 18px 18px;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  padding-block: clamp(2.25rem, 6vw, 4.5rem);
}

.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  margin: 0 0 1rem;
  font-family: var(--mono);
  font-size: .75rem;
  letter-spacing: .28em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-about .about-hero__eyebrow::before {
  content: "";
  width: 2rem;
  height: 2px;
  background: var(--red);
}

.page-about .about-hero__title {
  margin: 0 0 1.25rem;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(2.25rem, 7.5vw, 4.5rem);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 34em;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.85;
  color: var(--on-dark-dim);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
  padding: 0;
  background: var(--on-dark-line);
  border: 1px solid var(--on-dark-line);
}

.page-about .about-hero__stat {
  background: var(--ink);
  padding: .9rem 1rem;
}

.page-about .about-hero__stat dt {
  margin: 0 0 .35rem;
  font-size: .6875rem;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .about-hero__stat dd {
  margin: 0;
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .about-hero__stat .num {
  margin-right: .15rem;
}

.page-about .about-hero__art {
  position: relative;
  align-self: start;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 3px solid var(--paper);
  box-shadow: 10px 10px 0 var(--red);
}

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

.page-about .about-hero__seal {
  position: absolute;
  right: .75rem;
  bottom: .75rem;
  display: grid;
  place-items: center;
  width: 4.25rem;
  height: 4.25rem;
  background: var(--red);
  color: var(--paper);
  font-family: var(--serif);
  font-weight: 900;
  font-size: 1.125rem;
  line-height: 1.1;
  letter-spacing: .1em;
  border: 2px solid var(--ink);
  box-shadow: 4px 4px 0 var(--gold);
}

@media (min-width: 880px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }

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

/* ---------- 品牌由来 ---------- */

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

.page-about .about-origin__main {
  max-width: 40rem;
}

.page-about .about-origin__text {
  margin: 0 0 1.1rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--charcoal);
}

.page-about .about-origin__aside {
  align-self: start;
  padding: clamp(1.1rem, 2.5vw, 1.6rem);
  background: var(--aged);
  border: 2px solid var(--ink);
  box-shadow: 6px 6px 0 var(--gold-soft);
}

.page-about .about-origin__aside-tag {
  margin: 0 0 .6rem;
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .2em;
  color: var(--red-deep);
}

.page-about .about-origin__aside-text {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--ink);
}

@media (min-width: 880px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    align-items: start;
  }
}

/* ---------- 版本时间轴 ---------- */

.page-about .about-versions {
  background: var(--paper);
}

.page-about .timeline {
  list-style: none;
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
  padding: 0;
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 1.75rem 1.5rem;
  border-left: var(--tl-rail) solid var(--gold-line);
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 1.15rem;
  width: 12px;
  height: 12px;
  box-sizing: border-box;
  background: var(--red);
  border: 2px solid var(--ink);
  box-shadow: 0 0 0 3px var(--paper);
  z-index: 1;
}

.page-about .tl-node {
  border: 0;
  background: transparent;
}

.page-about .tl-node__head {
  list-style: none;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .75rem;
  padding: .75rem 1rem;
  cursor: pointer;
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: 4px 4px 0 var(--aged);
  transition: border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
}

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

.page-about .tl-node__head:hover {
  border-color: var(--red);
  background: var(--gold-soft);
  box-shadow: 6px 6px 0 var(--gold);
}

.page-about .tl-node__head:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.page-about .tl-node__head::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--red);
}

.page-about .tl-node[open] .tl-node__head::after {
  content: "－";
}

.page-about .tl-node__year {
  font-family: var(--mono);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: .02em;
}

.page-about .tl-node__label {
  padding: .15rem .55rem;
  background: var(--red);
  color: var(--paper);
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .06em;
}

.page-about .tl-node__body {
  padding: .9rem 1rem 1.1rem;
  border: 2px solid var(--ink);
  border-top: 0;
  background: var(--paper);
}

.page-about .tl-node__body p {
  margin: 0 0 .8rem;
  max-width: 38em;
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--charcoal);
}

.page-about .tl-node__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .45rem;
}

.page-about .tl-node__list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--charcoal);
}

.page-about .tl-node__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: .45rem;
  height: .45rem;
  background: var(--gold);
}

.page-about .about-versions__figure {
  margin: clamp(2rem, 5vw, 3rem) 0 0;
}

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

/* ---------- 原料产区 ---------- */

.page-about .about-source {
  background: var(--aged);
  border-block: 2px solid var(--ink);
}

.page-about .about-source__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  align-items: start;
}

.page-about .about-source__figure {
  margin: 0;
  box-shadow: 8px 8px 0 var(--red);
}

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

.page-about .about-source__text {
  margin: 0 0 1rem;
  max-width: 36em;
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--ink);
}

@media (min-width: 880px) {
  .page-about .about-source__head {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

.page-about .region-band {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(15rem, 1fr);
  gap: 1rem;
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
  padding: 0 0 .9rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .region-band:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
}

.page-about .region-card {
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  padding: 1.1rem;
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: 6px 6px 0 var(--gold-soft);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}

.page-about .region-card:hover {
  border-color: var(--red);
  box-shadow: 8px 8px 0 var(--gold);
}

.page-about .region-card .card__title {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ink);
}

.page-about .region-card .card__summary {
  margin: 0;
  font-size: .875rem;
  line-height: 1.8;
  color: var(--charcoal);
}

@media (min-width: 900px) {
  .page-about .region-band {
    grid-auto-flow: row;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-auto-columns: auto;
    overflow-x: visible;
  }
}

.page-about .about-source__footnote {
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  padding-left: 1rem;
  border-left: 3px solid var(--red);
  font-size: .875rem;
  line-height: 1.8;
  color: var(--charcoal);
}

/* ---------- 验收与记录 ---------- */

.page-about .about-verify {
  background: var(--ink);
  color: var(--paper);
}

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

.page-about .about-verify__eyebrow {
  color: var(--gold);
}

.page-about .about-verify__title {
  color: var(--paper);
}

.page-about .about-verify__text {
  margin: 0 0 1rem;
  max-width: 36em;
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--on-dark-dim);
}

.page-about .verify-fields {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--on-dark-line);
  border: 1px solid var(--on-dark-line);
  align-self: start;
}

.page-about .verify-fields__item {
  display: grid;
  gap: .25rem;
  padding: .85rem 1rem;
  background: var(--ink);
}

.page-about .verify-fields__key {
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .18em;
  color: var(--gold);
}

.page-about .verify-fields__val {
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--paper);
}

@media (min-width: 900px) {
  .page-about .about-verify__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

/* ---------- 团队与校对 ---------- */

.page-about .about-team__grid {
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
}

.page-about .about-team__stat {
  display: grid;
  gap: .4rem;
  padding: 1.1rem;
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: 5px 5px 0 var(--aged);
}

.page-about .about-team__num {
  font-family: var(--mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--red);
}

.page-about .about-team__cap {
  font-size: .8125rem;
  line-height: 1.65;
  color: var(--charcoal);
}

.page-about .about-team__proof {
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
  padding: clamp(1.1rem, 3vw, 1.75rem);
  background: var(--gold-soft);
  border: 2px solid var(--ink);
  box-shadow: 6px 6px 0 var(--ink);
}

.page-about .about-team__proof-title {
  margin: 0 0 .7rem;
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-team__proof-text {
  margin: 0 0 .8rem;
  max-width: 42em;
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-team__proof-links {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--charcoal);
}

.page-about .about-team__proof-links a {
  color: var(--indigo);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
}

.page-about .about-team__proof-links a:hover {
  border-bottom-color: var(--red);
}

/* ---------- 服务区域 ---------- */

.page-about .about-scope {
  background: var(--red);
  color: var(--paper);
  border-block: 2px solid var(--ink);
}

.page-about .about-scope__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  align-items: center;
}

.page-about .about-scope__eyebrow {
  color: var(--gold-soft);
}

.page-about .about-scope__title {
  color: var(--paper);
}

.page-about .about-scope__text {
  margin: 0;
  max-width: 34em;
  font-size: .9375rem;
  line-height: 1.85;
  color: rgba(245, 240, 230, .86);
}

.page-about .scope-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.page-about .scope-list__item {
  padding: .5rem .9rem;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 700;
  border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--gold);
}

@media (min-width: 880px) {
  .page-about .about-scope__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }
}

/* ---------- 入口回收 ---------- */

.page-about .about-out__title {
  margin-bottom: .75rem;
}

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

.page-about .about-out__card {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  padding: 1.1rem;
  text-decoration: none;
  color: inherit;
}

.page-about .about-out__card .card__title {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-out__card .card__summary {
  margin: 0;
  font-size: .875rem;
  line-height: 1.8;
  color: var(--charcoal);
}

.page-about .about-out__card .card__more {
  margin-top: auto;
  font-family: var(--mono);
  font-size: .8125rem;
  color: var(--indigo);
}

.page-about .about-out__card .card__more::after {
  content: " →";
  color: var(--red);
}

.page-about .about-out__card:hover .card__more {
  color: var(--red-deep);
}

@media (min-width: 700px) {
  .page-about .about-out__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1060px) {
  .page-about .about-out__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 窄屏收口 ---------- */

@media (max-width: 480px) {
  .page-about .tl-node__head {
    padding: .65rem .75rem;
    gap: .5rem;
  }

  .page-about .tl-node__year {
    font-size: 1.15rem;
  }

  .page-about .tl-node__body {
    padding: .8rem .75rem .9rem;
  }

  .page-about .about-hero__seal {
    width: 3.5rem;
    height: 3.5rem;
    font-size: .9375rem;
  }

  .page-about .about-hero__figure {
    box-shadow: 6px 6px 0 var(--red);
  }
}
<<<END>>>