.page-about {
  --about-pad: clamp(56px, 8vw, 110px);
  position: relative;
  overflow-x: hidden;
  background: var(--c-abyss);
  color: var(--c-foam);
}

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

.page-about .section-title {
  margin: clamp(10px, 1.5vw, 16px) 0 clamp(16px, 2vw, 22px);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(26px, 4vw, 44px);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--c-mist);
}
.page-about .breadcrumb a {
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .12s var(--ease), border-color .12s var(--ease);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--c-orange);
  border-bottom-color: var(--c-orange);
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--c-gold);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 3.5vw, 40px) 0 clamp(48px, 7vw, 92px);
  border-bottom: 1px solid var(--line-soft);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -22% -26%;
  z-index: 0;
  background-image:
    repeating-linear-gradient(90deg, var(--line-soft) 0 1px, transparent 1px 78px),
    repeating-linear-gradient(0deg, var(--line-soft) 0 1px, transparent 1px 78px);
  opacity: .5;
  transform: rotate(-5deg);
  pointer-events: none;
  animation: about-grid-drift 40s ease-in-out infinite alternate;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: -6%;
  right: -6%;
  bottom: 0;
  height: 1.5px;
  background: linear-gradient(90deg, transparent, var(--c-orange) 30%, var(--c-gold) 68%, transparent);
  transform: rotate(-1.6deg);
  transform-origin: 0 50%;
  pointer-events: none;
}
.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}
@keyframes about-grid-drift {
  0%   { transform: rotate(-5deg) translate3d(0, 0, 0); }
  100% { transform: rotate(-5deg) translate3d(8px, -8px, 0); }
}

.page-about .about-hero__grid {
  align-items: start;
  row-gap: clamp(18px, 3vw, 26px);
}
.page-about .about-hero__rail {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 16px;
}
.page-about .about-hero__tick {
  flex: 0 0 auto;
  width: 46px;
  height: 1.5px;
  background: linear-gradient(90deg, var(--c-orange), transparent);
}
.page-about .about-hero__body {
  grid-column: 1 / -1;
}
.page-about .about-hero__title {
  margin: 0 0 clamp(18px, 2.5vw, 26px);
  max-width: 13em;
}
.page-about .about-hero__lede {
  max-width: 46ch;
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--c-mist);
}
.page-about .about-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
}
.page-about .about-hero__facts li::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--c-orange);
  transform: rotate(45deg) translateY(-1px);
}

/* ---------- 01 起点与主张 ---------- */
.page-about .about-origin {
  padding: var(--about-pad) 0;
}
.page-about .about-origin__grid {
  row-gap: clamp(24px, 3.5vw, 34px);
}
.page-about .about-origin__rail,
.page-about .about-origin__body,
.page-about .about-origin__aside {
  grid-column: 1 / -1;
}

.page-about .about-claim {
  margin: clamp(26px, 3.5vw, 38px) 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--c-orange);
  font-size: clamp(1.05rem, 1.7vw, 1.3rem);
  line-height: 1.55;
  font-weight: 700;
  color: var(--c-foam);
}

.page-about .about-origin__aside {
  position: relative;
  padding: clamp(22px, 3vw, 30px);
}
.page-about .about-origin__aside-title {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--c-gold);
}
.page-about .about-facts {
  margin: 0;
  display: grid;
  gap: 14px;
}
.page-about .about-facts > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line-soft);
}
.page-about .about-facts > div:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.page-about .about-facts dt {
  margin: 0;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-mist);
}
.page-about .about-facts dd {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--c-foam);
}

/* ---------- 02 三条坐标轴 ---------- */
.page-about .about-axes {
  padding: var(--about-pad) 0;
}
.page-about .about-axes__head {
  max-width: 64ch;
  margin-bottom: clamp(34px, 5vw, 56px);
}

.page-about .axis-tree {
  position: relative;
}
.page-about .axis-tree__root {
  display: block;
  width: fit-content;
  margin: 0 auto clamp(30px, 4.5vw, 46px);
  padding: 11px 22px;
  background: var(--c-plum);
  color: var(--c-foam);
  font-size: 13px;
  letter-spacing: .12em;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}
.page-about .axis-tree__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
  position: relative;
}
.page-about .axis-node {
  position: relative;
  padding-left: 26px;
}
.page-about .axis-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 1.5px;
  height: calc(100% - 8px);
  background: var(--c-tide);
}
.page-about .axis-node__link {
  display: block;
  height: 100%;
  padding: clamp(20px, 2.6vw, 28px);
  background: var(--c-stand);
  border: 1px solid var(--line-soft);
  color: inherit;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
  transition: transform .12s var(--ease), background-color .18s var(--ease), border-color .12s var(--ease);
}
.page-about .axis-node__link:hover,
.page-about .axis-node__link:focus-visible {
  transform: translateY(-2px);
  background: var(--c-tide);
  border-color: var(--c-orange);
}
.page-about .axis-node__link:focus-visible {
  outline: none;
  filter: drop-shadow(0 0 10px rgba(255, 106, 44, .75));
}
.page-about .axis-node__dot {
  display: block;
  width: 10px;
  height: 10px;
  margin-bottom: 16px;
  background: var(--c-orange);
  transform: rotate(45deg);
}
.page-about .axis-node__index {
  display: block;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--c-gold);
}
.page-about .axis-node__title {
  margin: 6px 0 10px;
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  font-weight: 700;
  line-height: 1.2;
}
.page-about .axis-node__text {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-mist);
}
.page-about .axis-node__cta {
  display: inline-block;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-orange-soft);
}

/* ---------- 03 版本演进 ---------- */
.page-about .about-versions {
  position: relative;
  padding: var(--about-pad) 0;
  background: linear-gradient(180deg, var(--c-abyss) 0%, var(--c-plum-deep) 100%);
}
.page-about .about-versions__head {
  max-width: 62ch;
  margin-bottom: clamp(28px, 4vw, 44px);
}
.page-about .about-versions__media {
  margin: 0 0 clamp(34px, 5vw, 56px);
}
.page-about .about-versions__media img {
  width: 100%;
  opacity: .85;
}

.page-about .ver-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}
.page-about .ver-node {
  position: relative;
  padding-top: 24px;
}
.page-about .ver-node::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 6px;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--c-tide) 0 6px, transparent 6px 12px);
}
.page-about .ver-node::after {
  content: "";
  position: absolute;
  left: 0;
  top: 1px;
  width: 10px;
  height: 10px;
  background: var(--c-gold);
  transform: rotate(45deg);
}
.page-about .ver-node__tag {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-gold);
}
.page-about .ver-node__title {
  margin: 0 0 10px;
  font-size: clamp(1.02rem, 1.4vw, 1.18rem);
  font-weight: 700;
  line-height: 1.25;
}
.page-about .ver-node__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-mist);
}

/* ---------- 04 内容小组与流程 ---------- */
.page-about .about-team {
  padding: var(--about-pad) 0;
}
.page-about .about-team__media {
  margin: 0 0 clamp(32px, 4.5vw, 52px);
}
.page-about .about-team__grid {
  row-gap: clamp(26px, 3.5vw, 36px);
}
.page-about .about-team__body,
.page-about .about-team__aside {
  grid-column: 1 / -1;
}

.page-about .team-list {
  list-style: none;
  margin: clamp(26px, 3.5vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--c-tide);
}
.page-about .team-item {
  background: var(--c-abyss);
  padding: clamp(18px, 2.4vw, 24px);
}
.page-about .team-item h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  letter-spacing: .04em;
  color: var(--c-foam);
}
.page-about .team-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-about .about-team__aside-title {
  margin: 0 0 20px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--c-gold);
}
.page-about .about-team__aside .timeline__item strong {
  display: block;
  margin-bottom: 6px;
  font-size: .98rem;
  color: var(--c-foam);
}
.page-about .about-team__aside .timeline__item span {
  display: block;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-mist);
}

/* ---------- 05 本地服务版图 ---------- */
.page-about .about-local {
  padding: var(--about-pad) 0;
}
.page-about .about-local__grid {
  row-gap: clamp(26px, 3.5vw, 36px);
  align-items: start;
}
.page-about .about-local__media,
.page-about .about-local__panel {
  grid-column: 1 / -1;
  margin: 0;
}
.page-about .about-local__panel {
  position: relative;
}
.page-about .about-local__panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--c-tide) 1.2px, transparent 1.2px);
  background-size: 20px 20px;
  opacity: .55;
  pointer-events: none;
}
.page-about .about-local__panel > * {
  position: relative;
}
.page-about .about-local__panel .annotation {
  margin: clamp(18px, 2.4vw, 24px) 0 0;
}

.page-about .region-grid {
  list-style: none;
  margin: clamp(22px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.page-about .region-grid a {
  display: block;
  padding: 12px 14px;
  background: rgba(27, 84, 96, .38);
  border: 1px solid var(--line-soft);
  color: var(--c-foam);
  text-decoration: none;
  font-size: 14.5px;
  letter-spacing: .06em;
  transition: background-color .12s var(--ease), border-color .12s var(--ease), color .12s var(--ease);
}
.page-about .region-grid a:hover,
.page-about .region-grid a:focus-visible {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-abyss);
}
.page-about .region-grid a:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 2px;
}

/* ---------- 06 内容准则 ---------- */
.page-about .about-rules {
  padding: var(--about-pad) 0;
  background: var(--c-stand);
}
.page-about .rule-list {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.2vw, 22px);
}
.page-about .rule-item {
  padding: clamp(20px, 2.8vw, 30px);
  background: var(--c-abyss);
  border-left: 2px solid var(--c-tide);
  transition: border-color .12s var(--ease);
}
.page-about .rule-item:hover,
.page-about .rule-item:focus-within {
  border-left-color: var(--c-orange);
}
.page-about .rule-item__index {
  display: block;
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--c-gold);
}
.page-about .rule-item h3 {
  margin: 0 0 10px;
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  line-height: 1.25;
}
.page-about .rule-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-mist);
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  padding: 0 0 clamp(56px, 8vw, 100px);
  background: var(--c-stand);
}
.page-about .about-next__inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: clamp(26px, 4vw, 44px);
  background: linear-gradient(105deg, var(--c-plum-deep), var(--c-abyss) 72%);
  border: 1px solid var(--line-plum);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}
.page-about .about-next__kicker {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--c-gold);
}
.page-about .about-next__text {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-mist);
}
.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__rail {
    grid-column: 1 / span 1;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    align-self: stretch;
    gap: 22px;
    padding-top: 4px;
  }
  .page-about .about-hero__tick {
    width: 1.5px;
    height: 64px;
    background: linear-gradient(180deg, var(--c-orange), transparent);
  }
  .page-about .about-hero__body {
    grid-column: 3 / span 9;
  }

  .page-about .about-origin__rail {
    grid-column: 1 / span 1;
  }
  .page-about .about-origin__body {
    grid-column: 3 / span 6;
  }
  .page-about .about-origin__aside {
    grid-column: 9 / span 4;
  }

  .page-about .about-team__body {
    grid-column: 1 / span 7;
  }
  .page-about .about-team__aside {
    grid-column: 9 / span 4;
  }

  .page-about .about-local__media {
    grid-column: 1 / span 6;
  }
  .page-about .about-local__panel {
    grid-column: 8 / span 5;
  }

  .page-about .about-next__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
  }
  .page-about .about-next__actions {
    flex: 0 0 auto;
  }
}

@media (min-width: 820px) {
  .page-about .axis-tree__list {
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
  }
  .page-about .axis-tree__list::before {
    content: "";
    position: absolute;
    left: 16.6%;
    right: 16.6%;
    top: 0;
    height: 1.5px;
    background: repeating-linear-gradient(90deg, var(--c-tide) 0 7px, transparent 7px 14px);
  }
  .page-about .axis-node {
    padding-left: 0;
    padding-top: 30px;
  }
  .page-about .axis-node::before {
    left: 50%;
    top: 0;
    width: 1.5px;
    height: 30px;
    transform: translateX(-50%);
  }
}

@media (min-width: 640px) {
  .page-about .team-list {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .region-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 760px) {
  .page-about .rule-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .ver-track {
    grid-template-columns: repeat(12, 1fr);
    gap: clamp(16px, 2vw, 24px);
    align-items: start;
  }
  .page-about .ver-node:nth-child(1) {
    grid-column: 1 / span 3;
  }
  .page-about .ver-node:nth-child(2) {
    grid-column: 4 / span 3;
    margin-top: 28px;
  }
  .page-about .ver-node:nth-child(3) {
    grid-column: 7 / span 3;
    margin-top: 56px;
  }
  .page-about .ver-node:nth-child(4) {
    grid-column: 10 / span 3;
    margin-top: 84px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero::before {
    animation: none;
  }
  .page-about .axis-node__link,
  .page-about .region-grid a,
  .page-about .rule-item {
    transition: none;
  }
  .page-about .axis-node__link:hover,
  .page-about .axis-node__link:focus-visible {
    transform: none;
  }
}
<<<END>>>