.page-about {
  --about-shadow: 0 24px 50px -36px rgba(11, 31, 51, 0.5);
  background: var(--surface);
  color: var(--text-body);
  overflow-x: hidden;
}

.page-about .about-crumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-block: 22px 4px;
  font-size: 13px;
}

.page-about .about-crumbs__sep {
  color: var(--ink-500);
}

/* ---------- 首屏 ---------- */

.page-about .about-lede {
  position: relative;
  padding-block: 28px 56px;
}

.page-about .about-lede::before {
  content: "";
  position: absolute;
  inset: -60px -20% auto auto;
  width: 62%;
  height: 340px;
  background: radial-gradient(60% 60% at 70% 30%, rgba(235, 217, 160, 0.55), rgba(248, 244, 236, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-lede__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 40px;
}

.page-about .about-kicker {
  margin: 0 0 18px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ink-500);
}

.page-about .about-lede__title {
  margin: 0 0 24px;
  font-size: clamp(34px, 7.4vw, 62px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text-strong);
}

.page-about .about-lede__text {
  margin: 0 0 16px;
  max-width: 60ch;
  font-size: 17px;
  line-height: 1.8;
}

.page-about .about-figures {
  display: grid;
  gap: 14px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-figure {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 18px;
  background: var(--white-0);
  border: 1px solid var(--line);
  border-radius: 20px 20px 20px 6px;
}

.page-about .about-figure__label {
  font-size: 14px;
  color: var(--ink-500);
}

.page-about .about-lede__aside {
  padding: 24px 22px 20px;
  background: linear-gradient(150deg, var(--ink-700) 0%, var(--ink-900) 100%);
  border-radius: 26px 26px 26px 8px;
  color: var(--ink-100);
  box-shadow: var(--about-shadow);
}

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

.page-about .about-path__line {
  stroke: var(--ink-500);
  stroke-linecap: round;
}

.page-about .about-path__line--gold {
  stroke: var(--gold-500);
}

.page-about .about-path__node circle {
  fill: var(--ink-900);
  stroke: var(--gold-500);
  stroke-width: 2;
}

.page-about .about-path__node text {
  font-family: var(--font-mono);
  font-size: 13px;
  fill: var(--gold-200);
}

.page-about .about-lede__caption {
  margin: 14px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--gold-500);
  font-size: 13px;
  line-height: 1.7;
  color: var(--gold-200);
}

/* ---------- 章节头 ---------- */

.page-about .about-head {
  position: relative;
  margin-bottom: 30px;
  padding-left: 26px;
}

.page-about .about-head__note {
  position: absolute;
  left: -6px;
  top: 6px;
}

.page-about .about-head h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 5.4vw, 34px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-strong);
}

.page-about .about-head__lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
}

/* ---------- 发展历程 ---------- */

.page-about .about-track {
  padding-block: 56px 64px;
}

.page-about .about-track__figure {
  margin: 0 0 44px;
  border-radius: 24px;
  overflow: hidden;
  background: var(--ink-900);
}

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

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

.page-about .about-step {
  position: relative;
  margin-left: 12px;
  padding: 22px 0 26px 30px;
  border-left: 2px solid var(--ink-100);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

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

.page-about .about-step__no {
  position: absolute;
  left: -14px;
  top: 20px;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  font-size: 12px;
  color: var(--ink-700);
  background: var(--white-0);
  border: 2px solid var(--gold-500);
  border-radius: 50%;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-step__title {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 600;
  color: var(--text-strong);
}

.page-about .about-step__text {
  margin: 0 0 10px;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-step__tip {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--ink-500);
}

.page-about .about-step:hover,
.page-about .about-step:focus-within {
  border-left-color: var(--gold-500);
}

.page-about .about-step:hover .about-step__no,
.page-about .about-step:focus-within .about-step__no {
  background: var(--gold-500);
  color: var(--white-0);
}

.page-about .about-step:hover .about-step__tip,
.page-about .about-step:focus-within .about-step__tip {
  color: var(--celadon-500);
}

/* ---------- 服务版图 ---------- */

.page-about .about-map {
  padding-block: 56px 60px;
  background: var(--ink-100);
  border-radius: 40px 40px 40px 12px;
}

.page-about .about-map__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-map__intro h2 {
  margin: 0 0 16px;
  font-size: clamp(24px, 5.4vw, 34px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-strong);
}

.page-about .about-map__intro p {
  margin: 0 0 22px;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-map__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-map__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  font-size: 15px;
  color: var(--ink-700);
}

.page-about .about-map__figure {
  margin: 0;
  border-radius: 24px;
  overflow: hidden;
  background: var(--white-0);
}

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

.page-about .about-regions {
  display: grid;
  gap: 14px;
  margin-top: 36px;
}

.page-about .about-region {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 20px;
  text-align: left;
  font: inherit;
  color: inherit;
  background: var(--white-0);
  border: 1px solid rgba(42, 94, 138, 0.28);
  border-radius: 22px 22px 22px 6px;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-region__name {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-900);
}

.page-about .about-region__tag {
  align-self: flex-start;
  padding: 3px 10px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--white-0);
  background: var(--celadon-500);
  border-radius: 999px;
}

.page-about .about-region__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-body);
}

.page-about .about-region:hover,
.page-about .about-region:focus-visible {
  background: var(--ink-700);
  border-color: var(--gold-500);
  transform: translateY(-2px);
}

.page-about .about-region:hover .about-region__name,
.page-about .about-region:focus-visible .about-region__name {
  color: var(--white-0);
}

.page-about .about-region:hover .about-region__desc,
.page-about .about-region:focus-visible .about-region__desc {
  color: var(--ink-100);
}

.page-about .about-region:hover .about-region__tag,
.page-about .about-region:focus-visible .about-region__tag {
  background: var(--gold-500);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding-block: 60px 56px;
}

.page-about .about-team__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-team__roles {
  display: grid;
  gap: 12px;
}

.page-about .about-role {
  background: var(--white-0);
  border: 1px solid var(--line);
  border-radius: 20px 20px 20px 6px;
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-role:nth-child(2) {
  border-radius: 20px 6px 20px 20px;
}

.page-about .about-role:nth-child(3) {
  border-radius: 6px 20px 20px 20px;
}

.page-about .about-role[open] {
  border-color: var(--ink-500);
}

.page-about .about-role__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-role__summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--gold-500);
}

.page-about .about-role[open] .about-role__summary::after {
  content: "–";
}

.page-about .about-role__name {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-900);
}

.page-about .about-role__duty {
  font-size: 13px;
  color: var(--ink-500);
}

.page-about .about-role__body {
  padding: 0 18px 18px;
}

.page-about .about-role__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-body);
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 24px;
  object-fit: cover;
}

.page-about .about-team__figure .figure__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-500);
}

/* ---------- 做事方式 ---------- */

.page-about .about-way {
  padding-block: 56px 60px;
  background: linear-gradient(160deg, var(--ink-700) 0%, var(--ink-900) 88%);
  border-radius: 40px 40px 12px 40px;
  color: var(--ink-100);
}

.page-about .about-way__title {
  margin: 0 0 16px;
  font-size: clamp(24px, 5.4vw, 34px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--white-0);
}

.page-about .about-way__lede {
  margin: 0 0 32px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-100);
}

.page-about .about-way__grid {
  display: grid;
  gap: 16px;
}

.page-about .about-way__item {
  padding: 20px;
  background: rgba(255, 255, 255, 0.06);
  border-left: 3px solid var(--gold-500);
  border-radius: 4px 18px 18px 4px;
}

.page-about .about-way__item h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 600;
  color: var(--gold-200);
}

.page-about .about-way__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-100);
}

.page-about .about-way__note {
  margin: 32px 0 0;
  padding-top: 20px;
  border-top: 1px solid rgba(221, 231, 240, 0.25);
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gold-200);
}

/* ---------- 合作生态 ---------- */

.page-about .about-eco {
  padding-block: 60px 56px;
}

.page-about .about-eco__list {
  display: grid;
  gap: 24px;
}

.page-about .about-eco__item {
  padding-left: 20px;
  border-left: 2px solid var(--ink-100);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-eco__item:hover {
  border-left-color: var(--celadon-500);
}

.page-about .about-eco__item h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-strong);
}

.page-about .about-eco__item p {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
}

/* ---------- 下一步 ---------- */

.page-about .about-next {
  padding-block: 56px 72px;
}

.page-about .about-next__inner {
  padding-top: 40px;
  border-top: 2px solid var(--ink-900);
}

.page-about .about-next__title {
  margin: 0 0 14px;
  font-size: clamp(24px, 5.4vw, 34px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-strong);
}

.page-about .about-next__lede {
  margin: 0 0 32px;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-next__cards {
  display: grid;
  gap: 14px;
}

.page-about .about-next__card {
  display: block;
  padding: 22px 20px;
  background: var(--white-0);
  border: 1px solid var(--line);
  border-radius: 24px 24px 24px 8px;
  text-decoration: none;
  color: inherit;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  border-color: var(--gold-500);
  transform: translateY(-2px);
  box-shadow: var(--about-shadow);
}

.page-about .about-next__idx {
  display: block;
  margin-bottom: 10px;
  font-size: 13px;
  color: var(--gold-500);
}

.page-about .about-next__card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-strong);
}

.page-about .about-next__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-next__foot {
  margin: 28px 0 0;
  font-size: 15px;
  line-height: 1.9;
}

.page-about .about-next__foot a {
  color: var(--ink-700);
  text-decoration: underline;
  text-decoration-color: var(--gold-500);
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}

.page-about .about-next__foot a:hover,
.page-about .about-next__foot a:focus-visible {
  color: var(--coral-500);
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-about .about-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-regions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-way__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-next__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-about .about-lede {
    padding-block: 40px 80px;
  }

  .page-about .about-lede__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 5%;
    align-items: start;
  }

  .page-about .about-lede__aside {
    position: sticky;
    top: 108px;
  }

  .page-about .about-track {
    padding-block: 80px 88px;
  }

  .page-about .about-track__figure {
    margin-bottom: 56px;
  }

  .page-about .about-step {
    padding-left: 44px;
    padding-right: 8%;
  }

  .page-about .about-map {
    padding-block: 76px 80px;
  }

  .page-about .about-map__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 6%;
    align-items: center;
  }

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

  .page-about .about-team {
    padding-block: 84px 80px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 5%;
    align-items: start;
  }

  .page-about .about-team__figure {
    position: sticky;
    top: 108px;
  }

  .page-about .about-way {
    padding-block: 76px 80px;
  }

  .page-about .about-eco {
    padding-block: 84px 72px;
  }

  .page-about .about-eco__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
  }

  .page-about .about-next {
    padding-block: 72px 96px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-step__text {
    font-size: 16.5px;
  }

  .page-about .about-way__item {
    padding: 26px 24px;
  }
}