.page-about {
  --about-radius: 4px;
  --about-hair: 1px solid var(--line);
  --about-hair-gold: 1px solid rgba(201, 162, 77, 0.55);
}

/* ---------- 通用小件 ---------- */
.page-about .about-num {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--gold);
}
.page-about .about-num--xl {
  display: block;
  font-size: clamp(44px, 7vw, 76px);
  line-height: 1;
}

.page-about .about-section-head {
  max-width: 62ch;
  margin-bottom: clamp(28px, 4vw, 52px);
}
.page-about .about-section-head .section-title {
  margin: 10px 0 16px;
  font-size: clamp(28px, 4.4vw, 52px);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.12;
  color: var(--char);
}
.page-about .about-section-lede {
  margin: 0;
  font-size: clamp(15px, 1.3vw, 17px);
  line-height: 1.75;
  color: #43554c;
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  background:
    radial-gradient(120% 90% at 88% 8%, rgba(201, 162, 77, 0.20), transparent 58%),
    linear-gradient(158deg, var(--ink) 0%, var(--ink-2) 52%, #0b3128 100%);
  color: var(--paper);
  padding: clamp(22px, 3.4vw, 40px) 0 clamp(42px, 6.4vw, 96px);
  overflow: hidden;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.6;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 56px);
  align-items: center;
  margin-top: clamp(20px, 3vw, 40px);
}

.page-about .about-hero__eyebrow {
  color: var(--gold-hi);
  letter-spacing: 0.18em;
}
.page-about .about-hero__title {
  margin: 14px 0 20px;
  font-size: clamp(30px, 5.4vw, 68px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: #fff;
}
.page-about .about-hero__lede {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.35vw, 17px);
  line-height: 1.85;
  color: rgba(247, 249, 245, 0.84);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  border-top: var(--about-hair-gold);
}
.page-about .about-hero__fact {
  padding: 16px 12px 16px 0;
  border-bottom: 1px solid rgba(221, 229, 223, 0.16);
}
.page-about .about-hero__fact:nth-child(even) {
  padding-left: 16px;
  border-left: 1px solid rgba(221, 229, 223, 0.16);
}
.page-about .about-hero__fact dt {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
  text-transform: uppercase;
}
.page-about .about-hero__fact dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.2;
  color: rgba(247, 249, 245, 0.92);
}
.page-about .about-hero__fact dd .about-num {
  font-size: clamp(22px, 2.6vw, 30px);
  color: var(--gold-hi);
}

.page-about .about-hero__figure {
  margin: 0;
  border: var(--about-hair-gold);
  border-radius: var(--about-radius);
}
.page-about .about-hero__figure .media__caption {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--mist);
  background: rgba(10, 42, 34, 0.7);
  border-top: var(--about-hair-gold);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline-section {
  background: var(--paper);
  border-bottom: var(--about-hair);
}

.page-about .about-timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
}

.page-about .timeline-rail {
  display: none;
}
.page-about .timeline-rail__label {
  margin: 0 0 12px;
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--mist);
}
.page-about .timeline-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line);
}
.page-about .timeline-rail__link {
  display: block;
  padding: 10px 0 10px 18px;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--mist);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition: color .3s var(--ease), border-color .3s var(--ease);
}
.page-about .timeline-rail__link:hover,
.page-about .timeline-rail__link:focus-visible {
  color: var(--char);
  border-left-color: var(--gold);
}
.page-about .timeline-rail__link.is-active {
  color: var(--gold);
  border-left-color: var(--gold);
  font-weight: 500;
}

.page-about .timeline-body {
  position: relative;
  padding-left: 22px;
}
.page-about .timeline-body::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 5px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(201, 162, 77, 0.2) 82%, transparent);
}

.page-about .timeline-node {
  position: relative;
  padding: 0 0 clamp(28px, 3.6vw, 44px);
}
.page-about .timeline-node::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 10px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--gold);
  box-sizing: border-box;
}
.page-about .timeline-node__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  margin-bottom: 10px;
}
.page-about .timeline-node__year {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 44px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--gold);
}
.page-about .timeline-node__title {
  margin: 0;
  font-size: clamp(17px, 1.9vw, 22px);
  font-weight: 700;
  color: var(--char);
  letter-spacing: -0.01em;
}
.page-about .timeline-node__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: #43554c;
}

.page-about .timeline-node--dark {
  padding: clamp(22px, 3vw, 30px) clamp(20px, 3vw, 32px) clamp(22px, 3vw, 30px);
  margin-left: -6px;
  background: linear-gradient(140deg, var(--ink) 0%, var(--ink-2) 100%);
  border-radius: var(--about-radius);
}
.page-about .timeline-node--dark::before {
  left: -16px;
  background: var(--ink);
}
.page-about .timeline-node--dark .timeline-node__title {
  color: var(--paper);
}
.page-about .timeline-node--dark .timeline-node__body p {
  color: rgba(247, 249, 245, 0.82);
}

.page-about .timeline-figure {
  margin: 0 0 clamp(28px, 3.6vw, 44px);
  border: var(--about-hair);
  border-radius: var(--about-radius);
  overflow: hidden;
}
.page-about .timeline-figure .media__caption {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--mist);
  border-top: var(--about-hair);
  background: #fff;
}

/* ---------- 关系图 ---------- */
.page-about .about-map-section {
  background: linear-gradient(180deg, #ffffff 0%, var(--paper) 100%);
  border-bottom: var(--about-hair);
}

.page-about .about-map {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 48px);
  align-items: start;
}
.page-about .about-map__figure {
  border: var(--about-hair);
  border-radius: var(--about-radius);
  background:
    linear-gradient(180deg, rgba(10, 42, 34, 0.92), rgba(16, 59, 49, 0.92));
  padding: clamp(12px, 2vw, 24px);
}
.page-about .about-map__svg {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .about-map__lines path {
  opacity: 0.55;
}
.page-about .about-map__node rect {
  fill: rgba(247, 249, 245, 0.04);
  stroke: rgba(201, 162, 77, 0.7);
  stroke-width: 1;
  transition: fill .3s var(--ease), stroke .3s var(--ease);
}
.page-about .about-map__node text {
  fill: #E6CC86;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.page-about .about-map__node .about-map__sub {
  fill: rgba(247, 249, 245, 0.6);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
}
.page-about .about-map__node--root rect {
  fill: rgba(201, 162, 77, 0.16);
  stroke: #C9A24D;
  stroke-width: 1.4;
}
.page-about .about-map__node--base rect {
  stroke: rgba(221, 229, 223, 0.4);
}
.page-about .about-map__node:hover rect {
  fill: rgba(201, 162, 77, 0.22);
  stroke: #E6CC86;
}

.page-about .about-map__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--about-hair);
}
.page-about .about-map__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding: 16px 0;
  border-bottom: var(--about-hair);
}
.page-about .about-map__key {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
  padding-top: 3px;
  letter-spacing: 0.06em;
}
.page-about .about-map__item h3 {
  margin: 0 0 5px;
  font-size: 16px;
  font-weight: 700;
  color: var(--char);
}
.page-about .about-map__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: #52645b;
}

/* ---------- 团队 ---------- */
.page-about .about-team-section {
  background: var(--paper);
  border-bottom: var(--about-hair);
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: var(--about-hair);
  margin-bottom: clamp(28px, 3.6vw, 44px);
}
.page-about .about-team__stat {
  background: #fff;
  padding: clamp(16px, 2.4vw, 26px);
}
.page-about .about-team__stat-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .about-check {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.4vw, 24px);
  counter-reset: about-check;
}
.page-about .about-check__step {
  position: relative;
  background: #fff;
  border: var(--about-hair);
  border-radius: var(--about-radius);
  padding: clamp(18px, 2.4vw, 26px);
  transition: border-color .35s var(--ease), transform .35s var(--ease);
}
.page-about .about-check__step:hover {
  border-color: var(--gold);
  transform: translateY(-2px);
}
.page-about .about-check__idx {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
  margin-bottom: 10px;
}
.page-about .about-check__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--char);
}
.page-about .about-check__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: #52645b;
}

/* ---------- 服务地区 ---------- */
.page-about .about-region-section {
  background: #fff;
  border-bottom: var(--about-hair);
}
.page-about .about-region__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.6vw, 52px);
  align-items: start;
}
.page-about .about-region__copy .section-title {
  margin: 10px 0 16px;
  font-size: clamp(28px, 4.4vw, 48px);
  font-weight: 300;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--char);
}
.page-about .about-region__list {
  list-style: none;
  margin: clamp(20px, 2.8vw, 32px) 0 0;
  padding: 0;
  border-top: var(--about-hair);
}
.page-about .about-region__list li {
  padding: 16px 0;
  border-bottom: var(--about-hair);
}
.page-about .about-region__list h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--char);
}
.page-about .about-region__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: #52645b;
}
.page-about .about-region__figure {
  margin: 0;
  border: var(--about-hair);
  border-radius: var(--about-radius);
  overflow: hidden;
}
.page-about .about-region__figure .media__caption {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--mist);
  border-top: var(--about-hair);
  background: var(--paper);
}

/* ---------- 生态 ---------- */
.page-about .about-eco-section {
  background: linear-gradient(180deg, var(--paper) 0%, #eef3ef 100%);
}
.page-about .about-eco__card {
  padding: clamp(20px, 2.6vw, 28px);
  border-radius: var(--about-radius);
  background: #fff;
}
.page-about .about-eco__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight: 300;
  line-height: 1;
  color: var(--gold);
  margin-bottom: 12px;
  letter-spacing: -0.03em;
}
.page-about .about-eco__card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--char);
}
.page-about .about-eco__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: #52645b;
}

.page-about .about-eco__cta {
  margin-top: clamp(30px, 4vw, 52px);
  padding: clamp(22px, 3vw, 34px);
  background: linear-gradient(135deg, var(--ink) 0%, var(--ink-2) 100%);
  border-radius: var(--about-radius);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px 24px;
}
.page-about .about-eco__cta p {
  margin: 0;
  max-width: 40ch;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(247, 249, 245, 0.86);
}
.page-about .about-eco__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-hero__fact {
    padding: 18px 16px 18px 0;
    border-bottom: 0;
    border-right: 1px solid rgba(221, 229, 223, 0.16);
  }
  .page-about .about-hero__fact:nth-child(even) {
    padding-left: 18px;
    border-left: 0;
  }
  .page-about .about-hero__fact:last-child {
    border-right: 0;
  }
  .page-about .about-team__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-check {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.08fr 0.92fr;
  }
  .page-about .about-timeline {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: clamp(24px, 3vw, 48px);
  }
  .page-about .timeline-rail {
    display: block;
    position: sticky;
    top: calc(var(--topbar-h) + 24px);
    align-self: start;
  }
  .page-about .timeline-body {
    padding-left: 30px;
  }
  .page-about .timeline-node::before {
    left: -30px;
  }
  .page-about .timeline-node--dark {
    margin-left: 0;
  }
  .page-about .timeline-node--dark::before {
    left: -30px;
  }
  .page-about .about-map {
    grid-template-columns: 1.05fr 0.95fr;
  }
  .page-about .about-region__grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__title {
    font-size: clamp(44px, 4.6vw, 68px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline-rail__link,
  .page-about .about-check__step,
  .page-about .about-map__node rect {
    transition: none;
  }
}
<<<END>>>