.page-about {
  --about-edge: clamp(16px, 4vw, 40px);
  --about-block: clamp(48px, 7vw, 104px);
  --about-line: rgba(201, 162, 39, .22);
  color: var(--ivory);
  background: var(--ink-green);
  padding-bottom: 0;
}

.page-about .about-inner {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding-left: var(--about-edge);
  padding-right: var(--about-edge);
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-top: 22px;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--ivory-dim);
}
.page-about .crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .crumbs__list li {
  display: inline-flex;
  align-items: center;
}
.page-about .crumbs__list li:not(:first-child)::before {
  content: "/";
  margin: 0 9px;
  color: var(--brass-deep);
}
.page-about .crumbs__list a {
  color: var(--ivory-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.page-about .crumbs__list a:hover {
  color: var(--cyan);
  border-bottom-color: rgba(53, 214, 192, .5);
}
.page-about .crumbs__list [aria-current="page"] {
  color: var(--card);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(26px, 4vw, 48px);
  padding-bottom: clamp(30px, 4vw, 52px);
  border-bottom: 1px solid var(--about-line);
}
.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 62px);
  line-height: 1.14;
  letter-spacing: -.01em;
  margin: 14px 0 22px;
  max-width: 22ch;
  color: var(--ivory);
}
.page-about .about-hero .lead {
  max-width: 64ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--ivory-soft);
  margin: 0;
}
.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--brass-line);
  border: 1px solid var(--brass-line);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-about .about-hero__facts li {
  background: var(--ink-green);
  padding: 18px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1;
  color: var(--brass);
  letter-spacing: -.01em;
}
.page-about .about-hero__key {
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: .04em;
  color: var(--ivory-dim);
}

/* ---------- 图片容器 ---------- */
.page-about .img-frame {
  margin: 0;
}
.page-about .about-plate {
  margin: 0;
  border-bottom: 1px solid var(--about-line);
}
.page-about .img-frame__media {
  display: block;
  width: 100%;
  overflow: hidden;
  background: var(--indigo);
}
.page-about .img-frame__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-plate .img-frame__media {
  max-height: 62vh;
}
.page-about .img-frame__cap {
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--graphite);
  padding: 12px var(--about-edge) 0;
  max-width: 1180px;
  margin: 0 auto;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  padding-top: var(--about-block);
  padding-bottom: var(--about-block);
  border-bottom: 1px solid var(--about-line);
}
.page-about .about-section__head {
  max-width: 760px;
  margin-bottom: clamp(28px, 4vw, 52px);
}
.page-about .about-section h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.1vw, 36px);
  line-height: 1.24;
  letter-spacing: -.008em;
  margin: 12px 0 18px;
  color: var(--ivory);
}
.page-about .about-section h3 {
  font-size: clamp(16px, 1.9vw, 20px);
  font-weight: 600;
  line-height: 1.45;
  margin: 0 0 12px;
  color: var(--ivory);
}
.page-about .about-section p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ivory-soft);
  margin: 0 0 14px;
}
.page-about .about-section p:last-child {
  margin-bottom: 0;
}
.page-about .about-section .note {
  display: block;
  margin-top: clamp(20px, 3vw, 32px);
  padding-left: 14px;
  border-left: 2px solid var(--brass-deep);
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--graphite);
}
.page-about .about-links {
  margin-top: 18px;
}
.page-about .link {
  display: inline-block;
  color: var(--cyan);
  font-size: 15px;
  letter-spacing: .02em;
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(53, 214, 192, .45);
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}
.page-about .link:hover {
  color: var(--card);
  border-bottom-color: var(--card);
}

/* ---------- 01 规模 ---------- */
.page-about .about-scope {
  align-items: stretch;
  gap: 20px;
}
.page-about .about-scope__main {
  padding: 24px 22px;
  border-radius: var(--radius);
}
.page-about .about-scope__main h3 {
  margin-bottom: 14px;
}
.page-about .about-scope__nums {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--brass-line);
  border: 1px solid var(--brass-line);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-about .about-scope__cell {
  background: var(--felt);
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: background 160ms var(--ease);
}
.page-about .about-scope__cell:hover {
  background: #22463c;
}
.page-about .about-scope__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1;
  color: var(--brass);
}
.page-about .about-scope__label {
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: .04em;
  color: var(--ivory-dim);
}

/* ---------- 02 流程 ---------- */
.page-about .about-process__grid {
  gap: 32px;
}
.page-about .about-steps {
  margin-top: clamp(24px, 3vw, 34px);
  border-top: 1px solid var(--about-line);
  padding-top: 18px;
}
.page-about .about-steps__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--brass);
  margin: 0 0 12px;
  text-transform: uppercase;
}
.page-about .about-steps__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-steps__list li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-line);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ivory-soft);
}
.page-about .about-steps__list li:last-child {
  border-bottom: none;
}
.page-about .about-steps__list b {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 400;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--brass-deep);
  padding-top: 4px;
}

.page-about .about-flow-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 6px;
  margin-bottom: 26px;
}
.page-about .about-flow {
  display: flex;
  align-items: stretch;
  gap: 12px;
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: max-content;
}
.page-about .about-flow__step {
  position: relative;
  flex: 0 0 164px;
  padding: 18px 16px 20px;
  background: rgba(28, 59, 51, .72);
  border: 1px solid var(--brass-hair);
  border-radius: var(--radius);
  transition: border-color 160ms var(--ease), transform 160ms var(--ease);
}
.page-about .about-flow__step:hover {
  border-color: var(--brass);
  transform: translateY(-2px);
}
.page-about .about-flow__step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -12px;
  width: 12px;
  height: 1px;
  background: var(--brass-line);
}
.page-about .about-flow__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--brass);
  margin-bottom: 10px;
}
.page-about .about-flow__name {
  display: block;
  font-size: 17px;
  font-weight: 600;
  color: var(--ivory);
  margin-bottom: 6px;
  letter-spacing: .02em;
}
.page-about .about-flow__desc {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ivory-dim);
}
.page-about .about-process__fig {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--brass-hair);
}

/* ---------- 03 三片区 ---------- */
.page-about .about-districts__fig {
  margin: 0 0 clamp(24px, 3vw, 36px);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--brass-hair);
}
.page-about .about-districts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.page-about .about-district {
  display: flex;
  flex-direction: column;
  padding: 24px 22px 22px;
  background: var(--glass);
  border: 1px solid var(--brass-line);
  border-radius: var(--radius);
  transition: border-color 160ms var(--ease), transform 160ms var(--ease), background 160ms var(--ease);
}
.page-about .about-district:hover {
  transform: translateY(-2px);
  border-color: var(--brass);
  background: rgba(244, 239, 228, .09);
}
.page-about .about-district__head {
  padding-bottom: 14px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--brass-hair);
}
.page-about .about-district__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan);
  margin: 0 0 8px;
}
.page-about .about-district__head h3 {
  margin: 0;
  font-size: clamp(17px, 2vw, 20px);
}
.page-about .about-district p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ivory-soft);
  margin: 0 0 18px;
}
.page-about .about-district__meta {
  list-style: none;
  margin: 0 0 20px;
  padding: 16px 0 0;
  border-top: 1px dashed var(--brass-hair);
  display: grid;
  gap: 8px;
}
.page-about .about-district__meta li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  font-size: 13px;
}
.page-about .about-district__meta li span:first-child {
  color: var(--graphite);
  letter-spacing: .04em;
  white-space: nowrap;
}
.page-about .about-district__meta li span:last-child {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--card);
  text-align: right;
}
.page-about .about-district .link {
  margin-top: auto;
  align-self: flex-start;
  font-size: 14px;
}

/* ---------- 04 团队 ---------- */
.page-about .about-team__grid {
  gap: 32px;
}
.page-about .about-team__caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--brass);
  margin: 0 0 14px;
}
.page-about .about-team {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}
.page-about .about-team__row {
  display: grid;
  grid-template-columns: 92px 1fr 58px;
  align-items: center;
  gap: 12px;
  padding: 15px 0;
  border-bottom: 1px solid var(--about-line);
}
.page-about .about-team__name {
  font-size: 14px;
  color: var(--ivory-soft);
  letter-spacing: .02em;
}
.page-about .about-team__meter {
  position: relative;
  display: block;
  height: 6px;
  background: rgba(201, 162, 39, .12);
  border-radius: 3px;
  overflow: hidden;
}
.page-about .about-team__fill {
  display: block;
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--brass-deep), var(--brass));
}
.page-about .about-team__fill--a { width: 43%; }
.page-about .about-team__fill--b { width: 29%; }
.page-about .about-team__fill--c { width: 100%; }
.page-about .about-team__fill--d { width: 14%; }
.page-about .about-team__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  color: var(--brass);
  text-align: right;
}
.page-about .about-team__foot {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--graphite);
}

/* ---------- 05 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 92px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--brass-line) 8%, var(--brass-line) 92%, transparent);
}
.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 32px;
  padding: 14px 0 22px;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 92px;
  top: 24px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-green);
  border: 1.5px solid var(--brass);
  transform: translateX(-50%);
  transition: background 160ms var(--ease), border-color 160ms var(--ease), box-shadow 160ms var(--ease);
}
.page-about .about-timeline__item:hover::before {
  background: var(--brass);
  border-color: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 214, 192, .16);
}
.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--brass);
  padding-top: 4px;
}
.page-about .about-timeline__body {
  padding-bottom: 6px;
}
.page-about .about-timeline__body h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--ivory);
}
.page-about .about-timeline__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ivory-soft);
}

/* ---------- 06 合作生态 ---------- */
.page-about .about-eco__grid {
  gap: 32px;
}
.page-about .about-eco__nums {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--brass-line);
  border: 1px solid var(--brass-line);
  border-radius: var(--radius);
  overflow: hidden;
  align-self: start;
}
.page-about .about-eco__cell {
  background: var(--felt);
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.page-about .about-eco__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 3.6vw, 36px);
  line-height: 1;
  color: var(--brass);
}
.page-about .about-eco__label {
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: .03em;
  color: var(--ivory-dim);
}

/* ---------- 尾段导流 ---------- */
.page-about .about-next {
  padding-top: clamp(38px, 5vw, 68px);
  padding-bottom: clamp(46px, 6vw, 88px);
  background: var(--indigo);
}
.page-about .about-next h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 2.6vw, 30px);
  line-height: 1.3;
  letter-spacing: -.006em;
  color: var(--ivory);
  margin: 12px 0 clamp(20px, 3vw, 32px);
}
.page-about .about-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--brass-line);
  border: 1px solid var(--brass-line);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-about .about-next__list a {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 20px 22px;
  background: var(--indigo);
  text-decoration: none;
  transition: background 160ms var(--ease);
}
.page-about .about-next__list a:hover {
  background: #1a2340;
}
.page-about .about-next__list b {
  font-size: 16px;
  font-weight: 600;
  color: var(--ivory);
  letter-spacing: .02em;
}
.page-about .about-next__list span {
  font-size: 13px;
  line-height: 1.65;
  color: var(--ivory-dim);
}
.page-about .about-next__list a:hover b {
  color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-eco__nums {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-districts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    border: 1px solid var(--brass-line);
    border-radius: var(--radius);
    overflow: hidden;
  }
  .page-about .about-district {
    border: none;
    border-right: 1px solid var(--brass-line);
    border-radius: 0;
    background: rgba(244, 239, 228, .04);
  }
  .page-about .about-district:last-child {
    border-right: none;
  }
  .page-about .about-district:hover {
    transform: none;
    background: rgba(244, 239, 228, .09);
  }
  .page-about .about-next__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-flow {
    min-width: 0;
  }
  .page-about .about-flow__step {
    flex: 1 1 0;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero h1 {
    max-width: 20ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-district,
  .page-about .about-flow__step,
  .page-about .about-next__list a,
  .page-about .about-scope__cell,
  .page-about .link,
  .page-about .crumbs__list a {
    transition: none !important;
  }
  .page-about .about-timeline__item::before {
    transition: none !important;
  }
}
</main>