.page-about {
  --about-line: rgba(28, 26, 23, .14);
  --about-line-mid: rgba(28, 26, 23, .32);
  --about-gold-soft: rgba(200, 155, 60, .26);
  color: var(--char);
  padding: 28px 0 80px;
}

@media (min-width: 768px) {
  .page-about { padding: 40px 0 104px; }
}

@media (min-width: 1200px) {
  .page-about { padding: 56px 0 128px; }
}

.page-about .page-shell {
  padding-left: 20px;
  padding-right: 20px;
}

@media (min-width: 768px) {
  .page-about .page-shell {
    padding-left: 32px;
    padding-right: 32px;
  }
}

.page-about h2 {
  margin: 0;
  font-size: 26px;
  line-height: 1.24;
  font-weight: 900;
  letter-spacing: -.01em;
}

@media (min-width: 768px) {
  .page-about h2 { font-size: 34px; }
}

@media (min-width: 1200px) {
  .page-about h2 { font-size: 40px; }
}

.page-about h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
}

@media (min-width: 768px) {
  .page-about h3 { font-size: 20px; }
}

.page-about p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(28, 26, 23, .82);
}

@media (min-width: 768px) {
  .page-about p { font-size: 17px; }
}

.page-about [data-reveal] {
  transition: opacity .6s ease, transform .6s ease;
}

/* ---------- 首屏：品牌叙事 ---------- */

.page-about .about-vault {
  position: relative;
  padding-top: 22px;
  border-top: 3px solid var(--char);
  margin-bottom: 68px;
}

@media (min-width: 768px) {
  .page-about .about-vault { margin-bottom: 100px; }
}

@media (min-width: 1200px) {
  .page-about .about-vault { margin-bottom: 136px; }
}

.page-about .about-vault__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 22px;
  padding-bottom: 14px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-vault__meta span {
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--ink);
  white-space: nowrap;
}

.page-about .about-vault__grid {
  display: grid;
  gap: 36px;
}

@media (min-width: 900px) {
  .page-about .about-vault__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    column-gap: 56px;
    align-items: end;
  }
}

.page-about .about-vault__eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding-bottom: 5px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold-brown);
  border-bottom: 2px solid var(--gold);
}

.page-about .about-vault__title {
  margin: 0 0 20px;
  font-size: 32px;
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -.015em;
}

@media (min-width: 768px) {
  .page-about .about-vault__title { font-size: 46px; }
}

@media (min-width: 1200px) {
  .page-about .about-vault__title {
    font-size: 60px;
    line-height: 1.08;
  }
}

.page-about .about-vault__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-vault__figure {
  margin: 0;
}

.page-about .about-vault__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 3px solid var(--char);
  box-shadow: 8px 8px 0 rgba(28, 26, 23, .9);
  background: linear-gradient(135deg, var(--gold-light), var(--mist) 75%);
}

.page-about .about-vault__figure-cap {
  display: block;
  margin-top: 12px;
  font-size: 10.5px;
  letter-spacing: .12em;
  color: var(--gold-brown);
}

/* ---------- 使命与价值观 ---------- */

.page-about .about-mission {
  position: relative;
  padding: 52px 0 60px;
  border-top: 1px solid var(--about-line-mid);
  margin-bottom: 60px;
}

@media (min-width: 900px) {
  .page-about .about-mission {
    display: grid;
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    column-gap: 64px;
    row-gap: 22px;
    padding: 72px 0 80px;
    margin-bottom: 96px;
  }

  .page-about .about-mission__head {
    grid-row: span 2;
  }

  .page-about .about-principles {
    grid-column: 2;
  }
}

.page-about .about-mission__num,
.page-about .about-path__num,
.page-about .about-network__num,
.page-about .about-partners__num,
.page-about .about-cadence__num {
  display: inline-block;
  margin-bottom: 18px;
  padding: 3px 9px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold-brown);
  background: var(--cream);
  border: 2px solid var(--gold);
}

.page-about .about-mission__title {
  margin: 0;
}

.page-about .about-mission__copy {
  margin-bottom: 12px;
}

@media (min-width: 900px) {
  .page-about .about-mission__copy { margin-bottom: 0; }
}

.page-about .about-mission__copy p:first-child {
  font-size: 17px;
  font-weight: 500;
  color: var(--char);
}

@media (min-width: 768px) {
  .page-about .about-mission__copy p:first-child { font-size: 19px; }
}

.page-about .about-principles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-principle {
  padding: 18px 0 20px;
  border-top: 2px solid var(--char);
  transition: background .25s ease, padding-left .25s ease;
}

.page-about .about-principle:last-child {
  border-bottom: 2px solid var(--char);
}

.page-about .about-principle:hover,
.page-about .about-principle:focus-within {
  background: linear-gradient(90deg, var(--about-gold-soft), rgba(200, 155, 60, 0) 72%);
  padding-left: 14px;
}

.page-about .about-principle__num {
  display: inline-block;
  margin-bottom: 6px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-about .about-principle__name {
  margin: 0 0 6px;
}

.page-about .about-principle p {
  margin: 0;
  font-size: 15px;
}

/* ---------- 发展脉络时间线 ---------- */

.page-about .about-path {
  padding: 52px 0 60px;
  border-top: 3px solid var(--char);
  margin-bottom: 68px;
}

@media (min-width: 900px) {
  .page-about .about-path {
    padding: 72px 0 88px;
    margin-bottom: 96px;
  }
}

.page-about .about-path__head {
  margin-bottom: 38px;
}

@media (min-width: 900px) {
  .page-about .about-path__head { max-width: 640px; }
}

.page-about .about-path__title {
  margin: 0 0 14px;
}

.page-about .about-path__note {
  margin: 0;
  font-size: 14px;
  color: var(--ink);
}

.page-about .about-path__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-path__item {
  position: relative;
  padding: 0 0 30px 26px;
  border-left: 2px solid var(--ink);
}

.page-about .about-path__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-path__item::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 4px;
  width: 12px;
  height: 12px;
  box-sizing: border-box;
  background: var(--cream);
  border: 2px solid var(--ink);
  border-radius: 50%;
}

.page-about .about-path__item:last-child::before {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .about-path__stage {
  display: inline-block;
  margin-bottom: 10px;
  padding: 2px 8px;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--vault-brown);
  background: var(--gold-light);
}

.page-about .about-path__name {
  margin: 0 0 6px;
}

.page-about .about-path__body p {
  margin: 0;
  font-size: 15px;
}

@media (min-width: 900px) {
  .page-about .about-path__item {
    display: grid;
    grid-template-columns: 140px minmax(0, 1fr);
    column-gap: 32px;
    padding-left: 30px;
  }

  .page-about .about-path__stage {
    justify-self: start;
    align-self: start;
    margin: 4px 0 0;
  }
}

/* ---------- 服务网络 ---------- */

.page-about .about-network {
  padding: 52px 0 0;
  border-top: 3px solid var(--char);
  margin-bottom: 68px;
}

@media (min-width: 900px) {
  .page-about .about-network {
    padding-top: 72px;
    margin-bottom: 96px;
  }
}

.page-about .about-network__intro {
  max-width: 720px;
  margin-bottom: 34px;
}

.page-about .about-network__title {
  margin: 0 0 16px;
}

.page-about .about-network__figure {
  margin: 0 0 30px;
}

.page-about .about-network__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border: 3px solid var(--char);
  background: var(--mist);
}

.page-about .about-network__figure-cap {
  display: block;
  margin-top: 12px;
  font-size: 10.5px;
  letter-spacing: .12em;
  color: var(--gold-brown);
}

.page-about .about-network__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  border-top: 2px solid var(--char);
  border-left: 2px solid var(--char);
}

@media (min-width: 768px) {
  .page-about .about-network__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-network__stat {
  padding: 18px 14px 20px;
  border-right: 2px solid var(--char);
  border-bottom: 2px solid var(--char);
  background: var(--cream);
  transition: background .25s ease;
}

.page-about .about-network__stat:hover {
  background: var(--gold-light);
}

.page-about .about-network__stat dt {
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink);
}

.page-about .about-network__stat dd {
  margin: 0;
  line-height: 1;
}

.page-about .about-network__stat-num {
  font-size: 30px;
  font-weight: 700;
  color: var(--char);
}

@media (min-width: 768px) {
  .page-about .about-network__stat-num { font-size: 36px; }
}

.page-about .about-network__stat-unit {
  margin-left: 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--gold-brown);
}

/* ---------- 团队与协作 ---------- */

.page-about .about-partners {
  padding: 52px 0 0;
  border-top: 3px solid var(--char);
  margin-bottom: 68px;
}

@media (min-width: 900px) {
  .page-about .about-partners {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    column-gap: 64px;
    padding-top: 72px;
    margin-bottom: 96px;
    align-items: start;
  }
}

.page-about .about-partners__title {
  margin: 0 0 16px;
}

.page-about .about-partners__roles {
  margin: 26px 0 20px;
  padding: 0;
}

.page-about .about-partners__role {
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr);
  column-gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--about-line-mid);
}

.page-about .about-partners__role:last-child {
  border-bottom: 1px solid var(--about-line-mid);
}

.page-about .about-partners__role dt {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-partners__role dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(28, 26, 23, .78);
}

.page-about .about-partners__foot {
  margin: 0;
  font-size: 14px;
  color: var(--gold-brown);
}

.page-about .about-partners__figure {
  margin: 32px 0 0;
}

@media (min-width: 900px) {
  .page-about .about-partners__figure {
    margin: 0;
    position: sticky;
    top: 96px;
  }
}

.page-about .about-partners__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 3px solid var(--char);
  box-shadow: 8px 8px 0 rgba(28, 26, 23, .9);
  background: linear-gradient(135deg, var(--mist), var(--gold-light));
}

.page-about .about-partners__figure-cap {
  display: block;
  margin-top: 12px;
  font-size: 10.5px;
  letter-spacing: .12em;
  color: var(--gold-brown);
}

/* ---------- 更新节奏 ---------- */

.page-about .about-cadence {
  padding-top: 52px;
  border-top: 3px solid var(--char);
}

@media (min-width: 900px) {
  .page-about .about-cadence {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    column-gap: 72px;
    padding-top: 72px;
    align-items: start;
  }
}

.page-about .about-cadence__title {
  margin: 0 0 16px;
}

.page-about .about-cadence__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-cadence__rows {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  border-top: 2px solid var(--char);
}

@media (min-width: 900px) {
  .page-about .about-cadence__rows { margin-top: 0; }
}

.page-about .about-cadence__row {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  column-gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-line-mid);
}

@media (min-width: 600px) {
  .page-about .about-cadence__row {
    grid-template-columns: 130px minmax(0, 1fr);
  }
}

.page-about .about-cadence__key {
  padding-top: 3px;
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--gold-brown);
}

.page-about .about-cadence__val {
  font-size: 15px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--char);
}

@media (min-width: 768px) {
  .page-about .about-cadence__val { font-size: 16px; }
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal],
  .page-about .about-principle,
  .page-about .about-network__stat {
    transition: none;
  }
}