.page-about {
  --about-soft: rgba(43, 49, 56, .76);
  --about-hair: rgba(11, 59, 92, .14);
  --about-shadow: 0 14px 34px rgba(6, 42, 66, .08);
  display: block;
}

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

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  margin: 0 0 var(--space-4);
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  line-height: 20px;
  color: var(--about-soft);
}

.page-about .breadcrumbs li {
  display: flex;
  align-items: center;
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin: 0 8px;
  color: var(--gold);
}

.page-about .breadcrumbs a {
  color: var(--blue-deep);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s var(--ease);
}

.page-about .breadcrumbs a:hover {
  border-bottom-color: var(--orange);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: var(--space-5) 0 var(--space-6);
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(255, 138, 107, .20), transparent 58%),
    radial-gradient(90% 70% at 4% 100%, rgba(46, 139, 122, .14), transparent 60%),
    var(--paper);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--space-4);
}

.page-about .about-hero h1 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(32px, 7vw, 56px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--blue-deep);
}

.page-about .about-hero .lead {
  margin: 0 0 var(--space-4);
  font-size: 17px;
  line-height: 1.8;
  color: var(--graphite);
  max-width: 40em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.page-about .about-hero__side {
  position: relative;
  overflow: hidden;
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: linear-gradient(158deg, var(--blue-deep), var(--blue-ink));
  box-shadow: var(--shadow-soft);
}

.page-about .about-hero__side::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -80px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242, 106, 33, .55), transparent 68%);
  pointer-events: none;
}

.page-about .about-hero__pull {
  position: relative;
  margin: 0;
  padding-left: var(--space-3);
  border-left: 2px solid var(--gold);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.7;
  color: var(--paper);
}

.page-about .about-hero__stats {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
}

.page-about .about-hero__stats div {
  padding-top: 10px;
  border-top: 1px solid rgba(230, 195, 119, .40);
}

.page-about .about-hero__stats dt {
  font-size: 13px;
  line-height: 20px;
  color: rgba(247, 244, 238, .74);
}

.page-about .about-hero__stats dd {
  margin: 4px 0 0;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 22px;
  line-height: 1.2;
  color: var(--paper);
}

/* ---------- 通用章节头 ---------- */
.page-about .section {
  padding: var(--space-6) 0;
}

.page-about .section-heading {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.page-about .section-number {
  flex: none;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(40px, 9vw, 72px);
  line-height: .95;
  letter-spacing: -.04em;
  color: var(--orange);
}

.page-about .section-heading__body h2 {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(22px, 3.6vw, 28px);
  line-height: 1.3;
  letter-spacing: -.02em;
  color: var(--blue-deep);
}

.page-about .section-heading__body p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--about-soft);
  max-width: 46em;
}

/* ---------- 图片容器 ---------- */
.page-about .about-media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--about-hair);
  background: var(--mist-blue);
}

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

.page-about .about-media--spread img {
  aspect-ratio: 3 / 2;
}

.page-about .about-media--city img {
  aspect-ratio: 4 / 3;
}

.page-about .about-media__label {
  position: absolute;
  left: var(--space-2);
  bottom: var(--space-2);
  display: inline-block;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(6, 42, 66, .82);
  color: var(--paper);
  font-size: 12px;
  line-height: 20px;
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin__spread {
  display: grid;
  gap: var(--space-4);
}

.page-about .about-origin__p {
  margin: 0 0 var(--space-3);
  font-size: 16px;
  line-height: 1.8;
  color: var(--graphite);
  max-width: 44em;
}

.page-about .about-origin__notes {
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-2);
}

.page-about .about-origin__notes li {
  position: relative;
  padding: var(--space-2) var(--space-3) var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  background: var(--mist-blue);
  color: var(--graphite);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-origin__notes li::before {
  content: "";
  position: absolute;
  left: var(--space-2);
  top: 22px;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--orange);
}

.page-about .about-origin__notes strong {
  color: var(--blue-deep);
}

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

.page-about .about-origin__figure figcaption {
  margin-top: var(--space-2);
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-soft);
}

/* ---------- 02 时间线 ---------- */
.page-about .about-timeline__banner {
  margin: 0 0 var(--space-5);
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--blue-deep);
}

.page-about .about-timeline__banner img {
  display: block;
  width: 100%;
  object-fit: cover;
  opacity: .92;
}

.page-about .about-timeline__banner figcaption {
  position: absolute;
  left: var(--space-3);
  bottom: var(--space-3);
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(6, 42, 66, .86);
  color: var(--paper);
  font-size: 12px;
  line-height: 20px;
}

.page-about .about-timeline__list {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(230, 195, 119, .12));
}

.page-about .about-timeline__node {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-3) var(--space-2) var(--space-3) 0;
  border-radius: var(--radius-md);
  transition: background-color .18s var(--ease);
}

.page-about .about-timeline__node:hover {
  background: rgba(220, 233, 241, .60);
}

.page-about .about-timeline__index {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--orange);
  color: var(--white);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 15px;
  transition: transform .18s var(--ease), background-color .18s var(--ease);
}

.page-about .about-timeline__node:hover .about-timeline__index {
  background: var(--coral);
  transform: scale(1.08);
}

.page-about .about-timeline__body h3 {
  margin: 6px 0 6px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.4;
  color: var(--blue-deep);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--graphite);
  max-width: 60ch;
}

.page-about .about-timeline__meta {
  display: inline-block;
  margin-top: 10px;
  padding: 3px 12px;
  border: 1px solid rgba(46, 139, 122, .38);
  border-radius: 999px;
  font-size: 13px;
  line-height: 20px;
  color: var(--green-celadon);
}

.page-about .about-timeline__node--current .about-timeline__meta {
  border-color: var(--orange);
  color: var(--orange);
  background: rgba(255, 217, 194, .55);
}

/* ---------- 03 分类体系 ---------- */
.page-about .about-taxonomy {
  background:
    radial-gradient(70% 60% at 50% 0%, rgba(220, 233, 241, .85), transparent 70%),
    var(--paper);
}

.page-about .about-taxonomy__ring {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-taxonomy__cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--space-3) var(--space-2) var(--space-2);
  border: 1px solid var(--about-hair);
  border-radius: 20px 20px 20px 8px;
  background: var(--white);
  transition: transform .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-about .about-taxonomy__cell:nth-child(3n) {
  border-radius: 8px 20px 20px 20px;
}

.page-about .about-taxonomy__cell:hover {
  transform: translateY(-4px);
  border-color: var(--orange);
  box-shadow: var(--about-shadow);
}

.page-about .about-taxonomy__icon {
  color: var(--green-celadon);
  line-height: 0;
}

.page-about .about-taxonomy__cell:nth-child(4n + 1) .about-taxonomy__icon {
  color: var(--orange);
}

.page-about .about-taxonomy__name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
  color: var(--blue-deep);
}

.page-about .about-taxonomy__count {
  font-size: 13px;
  line-height: 20px;
  color: var(--about-soft);
}

.page-about .about-taxonomy__note {
  margin: var(--space-4) 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-soft);
}

.page-about .about-taxonomy__note a {
  color: var(--green-celadon);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 139, 122, .45);
}

/* ---------- 04 双端对照 ---------- */
.page-about .about-dual__layout {
  display: grid;
  gap: var(--space-4);
}

.page-about .about-dual .table-wrap {
  overflow-x: auto;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-md);
  background: var(--white);
}

.page-about .about-dual .table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 15px;
  line-height: 1.65;
}

.page-about .about-dual .table caption {
  padding: var(--space-3) var(--space-3) 0;
  text-align: left;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 16px;
  color: var(--blue-deep);
}

.page-about .about-dual .table th,
.page-about .about-dual .table td {
  padding: 14px var(--space-3);
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--about-hair);
  color: var(--graphite);
}

.page-about .about-dual .table thead th {
  background: var(--green-celadon);
  color: var(--white);
  font-family: var(--font-heading);
  font-weight: 700;
  border-bottom: 0;
}

.page-about .about-dual .table tbody th {
  font-weight: 700;
  color: var(--blue-deep);
  background: rgba(220, 233, 241, .55);
}

.page-about .about-dual .table tbody tr:nth-child(even) td {
  background: rgba(220, 233, 241, .38);
}

.page-about .about-dual .table .key-diff {
  background: rgba(46, 139, 122, .14);
  color: var(--blue-deep);
  font-weight: 700;
}

.page-about .about-dual__aside {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(255, 217, 194, .60), rgba(220, 233, 241, .70));
  border: 1px solid var(--about-hair);
}

.page-about .about-dual__aside h3 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.4;
  color: var(--blue-deep);
}

.page-about .about-dual__aside p {
  margin: 0 0 var(--space-3);
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
}

/* ---------- 05 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: var(--space-3);
}

.page-about .about-team__card {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--white);
  border: 1px solid var(--about-hair);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease);
}

.page-about .about-team__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--about-shadow);
}

.page-about .about-team__card h3 {
  margin: var(--space-2) 0 10px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.4;
  color: var(--blue-deep);
}

.page-about .about-team__card p {
  margin: 0 0 var(--space-2);
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .about-team__fact {
  margin: 0;
  padding-top: var(--space-2);
  border-top: 1px dashed rgba(11, 59, 92, .22);
  font-size: 14px;
  color: var(--green-celadon);
}

.page-about .about-team__card--editor {
  border-top: 4px solid var(--orange);
}

.page-about .about-team__card--adapt {
  border-top: 4px solid var(--green-celadon);
}

.page-about .about-team__card--support {
  border-top: 4px solid var(--gold);
}

/* ---------- 06 合作生态 ---------- */
.page-about .about-partners__grid {
  display: grid;
  gap: var(--space-3);
}

.page-about .about-partners__stat {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: linear-gradient(158deg, var(--blue-deep), var(--blue-ink));
  color: var(--paper);
}

.page-about .about-partners__stat--green {
  background: linear-gradient(158deg, var(--green-celadon), #1d5f53);
}

.page-about .about-partners__num {
  display: block;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 56px;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--gold);
}

.page-about .about-partners__stat h3 {
  margin: var(--space-2) 0 10px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-partners__stat p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(247, 244, 238, .86);
}

.page-about .about-partners__text {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-hair);
  background: rgba(220, 233, 241, .45);
}

.page-about .about-partners__text h3 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.4;
  color: var(--blue-deep);
}

.page-about .about-partners__text p {
  margin: 0 0 var(--space-3);
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .about-partners__text p:last-child {
  margin-bottom: 0;
}

.page-about .about-partners__text a {
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 106, 33, .45);
}

/* ---------- 07 服务范围 ---------- */
.page-about .about-coverage__grid {
  display: grid;
  gap: var(--space-4);
}

.page-about .about-coverage__p {
  margin: 0 0 var(--space-3);
  font-size: 16px;
  line-height: 1.8;
  color: var(--graphite);
  max-width: 44em;
}

.page-about .about-coverage__list {
  margin: 0 0 var(--space-3);
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-coverage__list li {
  padding-left: var(--space-3);
  border-left: 2px solid var(--gold);
  font-size: 15px;
  line-height: 1.75;
  color: var(--graphite);
}

.page-about .about-coverage__list strong {
  color: var(--blue-deep);
}

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

.page-about .about-coverage a {
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 106, 33, .45);
}

/* ---------- 08 后续入口 ---------- */
.page-about .about-paths {
  background: var(--paper);
}

.page-about .about-paths__grid {
  display: grid;
  gap: var(--space-3);
}

.page-about .about-path {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  text-decoration: none;
  border: 1px solid var(--about-hair);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), border-color .18s var(--ease);
}

.page-about .about-path:hover {
  transform: translateY(-4px);
  box-shadow: var(--about-shadow);
  border-color: var(--orange);
}

.page-about .about-path h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.4;
}

.page-about .about-path p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-path__go {
  margin-top: auto;
  padding-top: var(--space-2);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
}

.page-about .about-path--deep {
  background: linear-gradient(158deg, var(--blue-deep), var(--blue-ink));
  color: var(--paper);
}

.page-about .about-path--deep h3,
.page-about .about-path--deep .about-path__go {
  color: var(--paper);
}

.page-about .about-path--deep p {
  color: rgba(247, 244, 238, .86);
}

.page-about .about-path--paper {
  background: var(--white);
  color: var(--graphite);
}

.page-about .about-path--paper h3,
.page-about .about-path--paper .about-path__go {
  color: var(--green-celadon);
}

.page-about .about-path--mist {
  background: var(--mist-blue);
  color: var(--graphite);
}

.page-about .about-path--mist h3,
.page-about .about-path--mist .about-path__go {
  color: var(--blue-deep);
}

.page-about .about-paths__note {
  margin: var(--space-4) 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-soft);
}

.page-about .about-paths__note a {
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 106, 33, .45);
}

.page-about a:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 680px) {
  .page-about .about-taxonomy__ring {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: var(--space-6) 0 var(--space-7);
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: var(--space-5);
    align-items: start;
  }

  .page-about .about-origin__spread {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: var(--space-5);
    align-items: start;
  }

  .page-about .about-origin__figure {
    margin-top: var(--space-5);
  }

  .page-about .about-dual__layout {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: var(--space-4);
    align-items: start;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--space-3);
  }

  .page-about .about-partners__text {
    grid-column: 1 / -1;
  }

  .page-about .about-coverage__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: var(--space-5);
    align-items: center;
  }

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

@media (min-width: 1040px) {
  .page-about .about-taxonomy__ring {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-origin__notes li {
    padding-right: var(--space-4);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-taxonomy__cell,
  .page-about .about-team__card,
  .page-about .about-path,
  .page-about .about-timeline__index {
    transition: none;
  }

  .page-about .about-taxonomy__cell:hover,
  .page-about .about-team__card:hover,
  .page-about .about-path:hover {
    transform: none;
  }

  .page-about .about-timeline__node:hover .about-timeline__index {
    transform: none;
  }
}